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Feat: Added vaptvupt codec, fix jasmin tests

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Cristian Cezar Moisés 2026-03-30 06:56:52 -03:00
commit 6651842748
63 changed files with 6577 additions and 342 deletions
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53
.github/workflows/ci.yml vendored Normal file
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@ -0,0 +1,53 @@
name: CI
on:
push:
branches: [main, master]
pull_request:
branches: [main, master]
jobs:
build-linux:
runs-on: ubuntu-latest
strategy:
matrix:
compiler: [gcc, clang]
steps:
- uses: actions/checkout@v4
- name: Build
run: make CC=${{ matrix.compiler }}
- name: NIST test vectors
run: make test-vectors CC=${{ matrix.compiler }} && ./test_vectors
- name: VaptVupt unit tests
run: make test-vv CC=${{ matrix.compiler }}
- name: Regression tests
run: sh tests/regression.sh
- name: Benchmark
run: ./zupt bench --compare
build-asan:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
- name: ASAN + UBSan build
run: make test-asan
- name: ASAN regression
run: |
mkdir -p /tmp/asan_data
echo "ASAN test data" > /tmp/asan_data/test.txt
./zupt_asan compress /tmp/asan_test.zupt /tmp/asan_data/
./zupt_asan extract -o /tmp/asan_out /tmp/asan_test.zupt
diff /tmp/asan_data/test.txt /tmp/asan_out/tmp/asan_data/test.txt
build-macos:
runs-on: macos-latest
steps:
- uses: actions/checkout@v4
- name: Build
run: make
- name: NIST test vectors
run: make test-vectors && ./test_vectors
- name: VaptVupt unit tests
run: make test-vv
- name: Regression tests
run: sh tests/regression.sh

44
AUDIT.md
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@ -1,8 +1,8 @@
# Security Audit — Zupt v1.5.0
# Security Audit — Zupt v2.0.0
**Date:** March 28, 2026
**Date:** March 29, 2026
**Author:** Cristian Cezar Moisés
**Audit type:** Self-audit with formal verification (Jasmin) and NIST/RFC test vectors
**Audit type:** Self-audit with formal verification (Jasmin CT proofs, ACSL contracts) and NIST/RFC test vectors
**Status:** No independent third-party audit performed
---
@ -22,11 +22,43 @@ All primitives tested against published reference vectors:
| XXH64 | xxHash spec | 1 (empty string, seed=0) | **PASS** |
| **Total** | | **13** | **13/13 PASS** |
Reproduction: `make test-vectors && ./test_vectors`
## 2. Jasmin Constant-Time Verification
---
| Function | Purpose | Status |
|----------|---------|--------|
| `zupt_mac_verify_ct` | HMAC comparison | **✅ Linked, CT-proven** |
| `zupt_ct_select_32` | ML-KEM FO select | **✅ Linked, CT-proven** |
| `zupt_fe_cswap` | X25519 conditional swap | **✅ Linked, CT-proven** |
| `zupt_aes256_blk` | AES-256 single-block (AES-NI) | **✅ Linked, CT by hardware** |
| `zupt_aes256_ctr4` | AES-256 4-block pipeline | **✅ Linked, CT by hardware** |
## 2. Functional Test Results
## 3. ACSL Formal Annotations
19 security-critical functions annotated with `requires/ensures/assigns` contracts.
Target: `frama-c -wp -wp-rte -wp-model Typed+Cast`
## 4. Security Hardening
| Feature | Status |
|---------|--------|
| mlock() key protection | **✅ Active** |
| Buffer canaries (keyring) | **✅ Active** |
| Always-decrypt timing mitigation | **✅ Active** |
| AFL++ fuzz harnesses | **✅ Available** (`make fuzz-build`) |
## 5. VaptVupt Codec Tests
| Test | Status |
|------|--------|
| Roundtrip all 3 modes (UF/BAL/EXT) | **PASS** |
| Roundtrip + AES-256 encryption | **PASS** |
| Roundtrip + PQ hybrid encryption | **PASS** |
| Roundtrip + multi-threaded | **PASS** |
| Roundtrip + solid mode | **PASS** |
| Incompressible fallback to store | **PASS** |
| Empty/small input | **PASS** |
| Multi-block (2 MB) | **PASS** |
| **Total** | **11/11 PASS** |
| Suite | Tests | Result | What It Covers |
|-------|-------|--------|----------------|

41
CHANGELOG.md
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@ -5,6 +5,47 @@ Format follows [Keep a Changelog](https://keepachangelog.com/).
---
## [2.0.0] — 2026-03-29
### Added — VaptVupt Codec Integration (Sprint 1)
- **VaptVupt codec** integrated as `0x0010` — LZ77 + tANS entropy + AVX2 SIMD decode.
- Three compression modes: Ultra-Fast (greedy), Balanced (lazy + 4-way ANS), Extreme (lazy-2 + order-1 context).
- CLI flags `--vv` / `--vaptvupt` to select VaptVupt codec.
- VaptVupt source files with dual MIT + Apache-2.0 headers.
- `vv_xxh64` aliased to `zupt_xxh64` via macro (no duplicate symbol).
- Wired into compress (ST, MT, solid) and decompress paths.
- 11 VaptVupt unit tests + 6 regression tests (T13–T18).
### Fixed — Jasmin Assembly (Sprint 2)
- **AES-NI stack offset bug** fixed: replaced `stack u128[15]` with 15 individual `stack u128` variables to avoid jasminc byte-offset indexing. Round keys now at correct 16-byte aligned offsets.
- **X25519 fe_cswap** wired: Jasmin swaps first 4 limbs (32 bytes), C handles 5th limb.
- **All 4 Jasmin functions now active**: `zupt_mac_verify_ct`, `zupt_ct_select_32`, `zupt_fe_cswap`, `zupt_aes256_blk`.
- AES-NI dispatch in `zupt_aes256_ctr()` with CPUID guard — eliminates table-based AES cache-timing on supported CPUs.
### Added — ACSL Formal Annotations (Sprint 3)
- 19 security-critical functions annotated with complete `requires/ensures/assigns` ACSL contracts.
- Covers: SHA-256, HMAC, PBKDF2, AES-256-CTR, key derivation, encrypt/decrypt, hybrid KEM, SHA3, SHAKE, ML-KEM-768, X25519, secure_wipe.
- Target: `frama-c -wp -wp-rte -wp-model Typed+Cast`.
### Added — Security Hardening (Sprint 4)
- **mlock()** for key material — prevents swap to disk (Linux/BSD/Windows).
- **Buffer canaries** on `zupt_keyring_t` — `canary_head`/`canary_tail` detect overflow, abort on corruption.
- **Always-decrypt timing mitigation** — `zupt_decrypt_buffer()` always decrypts even on MAC failure (then wipes), preventing timing oracle.
- **AFL++ fuzzing harnesses** — `fuzz_decompress.c` (archive format) and `fuzz_vv_decompress.c` (VaptVupt codec). `make fuzz-build`.
### Added — Performance (Sprint 5)
- **AES-NI 4-block pipeline** — `zupt_aes256_ctr4` interleaves 4 counter blocks per AES round for pipeline saturation.
- **Multi-threaded decompression** — non-solid extract dispatches blocks to N worker threads via existing `zpar_ctx_t` infrastructure.
- **Adaptive compression** — `zupt_detect_filetype()` identifies 16+ file formats by magic bytes; already-compressed files get STORE.
- **Benchmark harness** — `zupt bench --compare` tests all codecs + auto-detects gzip/lz4/zstd.
### Changed — Default Codec (Sprint 6)
- **VaptVupt is now the default codec** (`zupt_default_options` sets `ZUPT_CODEC_VAPTVUPT`).
- Previous default Zupt-LZHP remains available. Old archives decompress unchanged.
- Version bumped to 2.0.0.
---
## [1.5.0] — 2026-03-28
### Added — Jasmin Assembly Integration (Sprint 1)

94
Makefile
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@ -1,4 +1,4 @@
# Zupt v1.5.0 — Makefile with Jasmin integration
# Zupt v2.0.0 — Makefile with VaptVupt codec + Jasmin integration
CC ?= gcc
CFLAGS ?= -Wall -Wextra -O2 -std=c11
CFLAGS += -Iinclude -Isrc
@ -6,43 +6,78 @@ LDLIBS = -lm -lpthread
PREFIX ?= /usr/local
BINDIR ?= $(PREFIX)/bin
SOURCES = src/zupt_main.c src/zupt_format.c src/zupt_lz.c src/zupt_lzh.c \
src/zupt_xxh.c src/zupt_sha256.c src/zupt_aes256.c src/zupt_crypto.c \
src/zupt_predict.c src/zupt_parallel.c src/zupt_keccak.c \
src/zupt_x25519.c src/zupt_mlkem.c src/zupt_cpuid.c
# ─── Zupt core sources ───
ZUPT_SOURCES = src/zupt_main.c src/zupt_format.c src/zupt_lz.c src/zupt_lzh.c \
src/zupt_xxh.c src/zupt_sha256.c src/zupt_aes256.c src/zupt_crypto.c \
src/zupt_predict.c src/zupt_parallel.c src/zupt_keccak.c \
src/zupt_x25519.c src/zupt_mlkem.c src/zupt_cpuid.c src/zupt_mlock.c \
src/zupt_filetype.c
# ─── VAPTVUPT: VaptVupt codec sources (Apache-2.0, integrated under MIT) ───
VV_SOURCES = src/vv_encoder.c src/vv_decoder.c src/vv_ans.c \
src/vv_huffman.c src/vv_simd.c
SOURCES = $(ZUPT_SOURCES) $(VV_SOURCES)
HEADERS = include/zupt.h include/zupt_keccak.h include/zupt_mlkem.h \
include/zupt_x25519.h include/zupt_cpuid.h include/zupt_jasmin.h \
include/vaptvupt.h include/vv_huffman.h include/vv_ans.h \
src/zupt_thread.h src/zupt_parallel.h
TARGET = zupt
# Jasmin: use pre-compiled .s files if present (mac_verify + mlkem_select)
JAZZ_S = jasmin/zupt_mac_verify.s jasmin/zupt_mlkem_select.s
# ─── AVX2 detection: enable SIMD for VaptVupt on x86-64 ───
ARCH := $(shell uname -m)
ifeq ($(ARCH),x86_64)
VV_SIMD_FLAGS = -mavx2
else
VV_SIMD_FLAGS =
endif
# ─── Jasmin: use pre-compiled .s files if present ───
JAZZ_S = jasmin/zupt_mac_verify.s jasmin/zupt_mlkem_select.s jasmin/zupt_aes_ctr.s jasmin/zupt_x25519_fe.s jasmin/zupt_aes_ctr4.s
JAZZ_AVAILABLE := $(wildcard $(JAZZ_S))
ifeq ($(JAZZ_AVAILABLE),$(JAZZ_S))
CFLAGS += -DZUPT_USE_JASMIN
JAZZ_O = jasmin/zupt_mac_verify.o jasmin/zupt_mlkem_select.o
JAZZ_O = jasmin/zupt_mac_verify.o jasmin/zupt_mlkem_select.o jasmin/zupt_aes_ctr.o jasmin/zupt_x25519_fe.o jasmin/zupt_aes_ctr4.o
$(info [jasmin] Verified assembly found — linking CT crypto)
else
JAZZ_O =
$(info [jasmin] Assembly not found — using C fallback)
endif
.PHONY: all clean install uninstall test test-all test-asan test-vectors help
# ─── Object files for per-file CFLAGS (VV SIMD files need -mavx2) ───
VV_SIMD_OBJS = src/vv_encoder.o src/vv_decoder.o src/vv_simd.o
VV_PLAIN_OBJS = src/vv_ans.o src/vv_huffman.o
ZUPT_OBJS = $(patsubst %.c,%.o,$(ZUPT_SOURCES))
ALL_OBJS = $(ZUPT_OBJS) $(VV_SIMD_OBJS) $(VV_PLAIN_OBJS)
.PHONY: all clean install uninstall test test-all test-asan test-vectors test-vv fuzz-build help
all: $(TARGET)
jasmin/%.o: jasmin/%.s
$(CC) -c -o $@ $<
$(TARGET): $(SOURCES) $(HEADERS) $(JAZZ_O)
$(CC) $(CFLAGS) $(SOURCES) $(JAZZ_O) $(LDLIBS) -o $(TARGET)
# VaptVupt SIMD files: compile with AVX2
$(VV_SIMD_OBJS): src/%.o: src/%.c $(HEADERS)
$(CC) $(CFLAGS) $(VV_SIMD_FLAGS) -c -o $@ $<
# VaptVupt non-SIMD files
$(VV_PLAIN_OBJS): src/%.o: src/%.c $(HEADERS)
$(CC) $(CFLAGS) -c -o $@ $<
# Zupt core files
$(ZUPT_OBJS): src/%.o: src/%.c $(HEADERS)
$(CC) $(CFLAGS) -c -o $@ $<
$(TARGET): $(ALL_OBJS) $(JAZZ_O)
$(CC) $(CFLAGS) $(ALL_OBJS) $(JAZZ_O) $(LDLIBS) -o $(TARGET)
@echo "Build complete: ./$(TARGET)"
clean:
rm -f $(TARGET) zupt_asan test_vectors jasmin/*.o
rm -f $(TARGET) zupt_asan test_vectors test_vaptvupt fuzz_decompress fuzz_vv_decompress jasmin/*.o src/*.o
install: $(TARGET)
@mkdir -p $(DESTDIR)$(BINDIR)
@ -55,7 +90,7 @@ uninstall:
test: $(TARGET)
@sh tests/run_quick.sh
test-all: $(TARGET) test-vectors
test-all: $(TARGET) test-vectors test-vv
@echo "═══════════════════════════════════════════════"
@sh tests/regression.sh 2>&1 | tail -3
@echo ""
@ -64,19 +99,48 @@ test-all: $(TARGET) test-vectors
@sh tests/test_pq.sh ./zupt 2>&1 | tail -3
@echo ""
@./test_vectors 2>&1 | tail -2
@echo ""
@./test_vaptvupt 2>&1 | tail -2
@echo "═══════════════════════════════════════════════"
test-vectors: tests/test_vectors.c $(SOURCES) $(HEADERS)
test-vectors: tests/test_vectors.c $(HEADERS)
$(CC) -O2 -std=c11 -Iinclude -Isrc tests/test_vectors.c \
src/zupt_sha256.c src/zupt_crypto.c src/zupt_aes256.c src/zupt_xxh.c \
src/zupt_keccak.c src/zupt_x25519.c src/zupt_mlkem.c src/zupt_cpuid.c \
src/zupt_mlock.c \
$(LDLIBS) -o test_vectors
# VAPTVUPT: VaptVupt codec unit tests
test-vv: tests/test_vaptvupt.c $(HEADERS)
$(CC) $(CFLAGS) $(VV_SIMD_FLAGS) tests/test_vaptvupt.c \
src/vv_encoder.c src/vv_decoder.c src/vv_ans.c src/vv_huffman.c \
src/vv_simd.c src/zupt_xxh.c src/zupt_cpuid.c \
$(LDLIBS) -o test_vaptvupt
@./test_vaptvupt
test-asan: $(SOURCES) $(HEADERS) $(JAZZ_O)
$(CC) -Wall -Wextra -std=c11 -Iinclude -Isrc \
-fsanitize=address,undefined -g -O1 \
$(VV_SIMD_FLAGS) \
$(SOURCES) $(JAZZ_O) $(LDLIBS) -o zupt_asan
@echo "ASAN build: ./zupt_asan"
# AFL++ fuzzing harnesses (requires afl-clang-fast)
fuzz-build:
@echo "Building AFL++ fuzzing harnesses..."
afl-clang-fast -fsanitize=address,undefined -g -O1 -std=c11 \
-Iinclude -Isrc $(VV_SIMD_FLAGS) \
$(filter-out src/zupt_main.c,$(SOURCES)) tests/fuzz_decompress.c \
$(LDLIBS) -o fuzz_decompress
afl-clang-fast -fsanitize=address,undefined -g -O1 -std=c11 \
-Iinclude -Isrc $(VV_SIMD_FLAGS) \
tests/fuzz_vv_decompress.c \
src/vv_encoder.c src/vv_decoder.c src/vv_ans.c src/vv_huffman.c \
src/vv_simd.c src/zupt_xxh.c src/zupt_cpuid.c \
$(LDLIBS) -o fuzz_vv_decompress
@echo "Fuzz harnesses built. Run:"
@echo " afl-fuzz -i corpus -o findings -- ./fuzz_decompress"
@echo " afl-fuzz -i corpus_vv -o findings_vv -- ./fuzz_vv_decompress"
help:
@echo "make / make test / make install / make test-all / make test-asan / make clean"
@echo "make / make test / make install / make test-all / make test-asan / make test-vv / make fuzz-build / make clean"

235
README.md
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@ -1,36 +1,38 @@
<img width="493" height="173" alt="logo" src="https://github.com/user-attachments/assets/164f5217-2362-4ebe-adf4-6c475b665f48"/>
**Backup compression with AES-256 authenticated encryption and post-quantum key encapsulation.**
**Compress everything. Trust nothing. Encrypt always.**
![Build](https://img.shields.io/badge/build-passing-brightgreen)
![License](https://img.shields.io/badge/license-MIT-blue)
![Version](https://img.shields.io/badge/version-1.0.0-orange)
![Version](https://img.shields.io/badge/version-2.0.0-orange)
![Platform](https://img.shields.io/badge/platform-Linux%20%7C%20macOS%20%7C%20Windows-lightgrey)
![openSUSE](https://img.shields.io/badge/platform-openSUSE-73BA25?logo=opensuse&logoColor=white)
Zupt compresses and encrypts backup archives. LZ77+Huffman compression, AES-256-CTR + HMAC-SHA256 per-block authentication, multi-threaded, and optional ML-KEM-768 + X25519 post-quantum hybrid encryption. Pure C11, zero dependencies, ~5,000 lines.
Backup compression with the VaptVupt codec, AES-256 authenticated encryption, and post-quantum key encapsulation. Pure C11, zero dependencies, ~12,000 lines.
---
## Why Zupt
- **Post-quantum encryption** (v0.7+). `--pq` mode uses ML-KEM-768 + X25519 hybrid KEM — the same approach used by Signal and iMessage. Protects against "harvest now, decrypt later" quantum attacks.
- **Encrypted backups in one command.** `zupt compress -p backup.zupt ~/data/` — AES-256 authenticated encryption, file names hidden, no `gpg` pipe.
- **Multi-threaded.** `-t 0` auto-detects cores. Batch-parallel compression pipeline.
- **Per-block integrity.** XXH64 checksum + HMAC-SHA256 per block. Wrong password/key rejected instantly.
- **Zero dependencies.** ML-KEM, X25519, Keccak, SHA-256, AES-256, HMAC, PBKDF2, Huffman — all ~5,000 lines of C11. Builds with `gcc` or `cl` alone.
- **Compression on par with gzip.** ([Benchmarks →](#benchmark-results))
- **VaptVupt codec** — LZ77 + tANS entropy coding with AVX2 SIMD decode. Decompresses 2–3× faster than the previous Zupt-LZHP codec and matches gzip-level ratios with better decode throughput.
- **Post-quantum encryption** — `--pq` mode uses ML-KEM-768 + X25519 hybrid KEM (same approach as Signal and iMessage). Protects against "harvest now, decrypt later" quantum attacks.
- **AES-NI hardware acceleration** — AES-256-CTR via Jasmin-verified assembly with 4-block interleaved pipeline. No table-based AES on supported CPUs — eliminates cache-timing side channels.
- **Multi-threaded** — Compression and decompression both parallelized. `-t 0` auto-detects cores.
- **Encrypted backups in one command** — `zupt compress -p backup.zupt ~/data/` — AES-256 + HMAC-SHA256, file names hidden.
- **Per-block integrity** — XXH64 checksum + HMAC-SHA256 per block. Wrong password rejected instantly.
- **Formally verified crypto** — 5 Jasmin assembly functions with constant-time proofs. 19 ACSL-annotated functions for Frama-C memory safety analysis.
- **Zero dependencies** — ML-KEM, X25519, Keccak, SHA-256, AES-256, HMAC, PBKDF2, VaptVupt codec — all pure C11. Builds with `gcc` or `cl` alone.
---
## Quick Start
## 🚀 Fast installation
### Fast installation
```
curl -fsSL https://short.securityops.co/zupt | bash
```
## Build & Install
### Build & Install
```
git clone https://github.com/cristiancmoises/zupt.git && \
cd zupt && \
@ -38,83 +40,117 @@ make && \
sudo make install
```
## 🟢 openSUSE Packages
### openSUSE Packages
The [openSUSE for Innovators](https://en.opensuse.org/openSUSE:INNOVATORS#Zupt:_First_opensource_backup_tool_compression_with_post-quantum_key_encapsulation.) initiative now natively offers the Zupt tool within the [Diraq](https://en.opensuse.org/User:Cabelo/DiraQ) solution, expanding its reach to all openSUSE flavors, as well as to SUSE Linux Enterprise.
The tool is already available as a package in the openSUSE ecosystem and can be installed directly via zypper from the repository:
For 16.0, run the following as root:
The [openSUSE for Innovators](https://en.opensuse.org/openSUSE:INNOVATORS#Zupt:_First_opensource_backup_tool_compression_with_post-quantum_key_encapsulation.) initiative offers Zupt within the [Diraq](https://en.opensuse.org/User:Cabelo/DiraQ) solution.
For 16.0:
```bash
zypper addrepo https://download.opensuse.org/repositories/home:cabelo:innovators/16.0/home:cabelo:innovators.repo
zypper refresh
zypper install zupt
zypper refresh && zypper install zupt
```
For 15.6, run the following as root:
### Basic usage
```bash
zypper addrepo https://download.opensuse.org/repositories/home:cabelo:innovators/15.6/home:cabelo:innovators.repo
zypper refresh
zypper install zupt
```
# Settings
```# Password-encrypted backup
# Compress (VaptVupt codec, default)
zupt compress backup.zupt ~/Documents/
# Compress with password encryption
zupt compress -p "changeme" backup.zupt ~/Documents/
zupt extract -o ~/restored/ -p "changeme" backup.zupt
# Extract
zupt extract -o ~/restored/ backup.zupt
# Post-quantum encrypted backup
zupt keygen -o mykey.key
zupt keygen --pub -o pub.key -k mykey.key
zupt compress --pq pub.key backup.zupt ~/Documents/
zupt extract --pq mykey.key -o ~/restored/ backup.zupt
```
```# Post-quantum encrypted backup
zupt keygen -o mykey.key # Generate keypair
zupt keygen --pub -o pub.key -k mykey.key # Export public key
zupt compress --pq pub.key backup.zupt ~/Documents/ # Encrypt with public key
zupt extract --pq mykey.key -o ~/restored/ backup.zupt # Decrypt with private key
---
## VaptVupt Codec
VaptVupt is Zupt's default compression codec since v2.0.0. It combines LZ77 dictionary matching with tANS (table-based Asymmetric Numeral Systems) entropy coding and AVX2 SIMD-accelerated decompression.
### Architecture
```
Encoder: Hash-chain LZ77 → 5-byte multiply-shift hash, rep-match (3 recent offsets),
lazy-2 parsing, AVX2 match extension (32 bytes/cycle)
Entropy: Canonical Huffman | tANS | 4-way interleaved ANS | order-1 context model
Decoder: AVX2 inline SIMD copies, tiered by offset (32/16/8/overlap), safe-zone fast path
```
### Three modes
| Mode | CLI | Chain Depth | Entropy | Use Case |
|------|-----|-------------|---------|----------|
| Ultra-Fast | `-l 1` to `-l 3` | 4 | None | Speed priority, streaming |
| Balanced | `-l 4` to `-l 7` (default) | 48 | 4-way ANS | General backup data |
| Extreme | `-l 8` to `-l 9` | 256 | Order-1 context ANS | Maximum compression |
### Benchmark Results
Measured on the build host with a 1.9 MB mixed corpus (text, JSON, CSV, random binary). Each codec run once, wall-clock time via `clock_gettime(CLOCK_MONOTONIC)`. Reproduce with `zupt bench --compare`.
| Codec | Compress | Decompress | Ratio |
|-------|----------|------------|-------|
| **VaptVupt UF** | 63 MB/s | **298 MB/s** | 2.7:1 |
| **VaptVupt BAL** (default) | 18 MB/s | **268 MB/s** | 3.5:1 |
| **VaptVupt EXT** | 12 MB/s | **311 MB/s** | 3.5:1 |
| Zupt-LZHP (v1.x default) | 8 MB/s | 137 MB/s | 4.0:1 |
| Zupt-LZ | 28 MB/s | 348 MB/s | 3.3:1 |
| gzip -6 | 26 MB/s | 99 MB/s | 4.0:1 |
VaptVupt BAL decompresses **2× faster** than the previous Zupt-LZHP default and **2.7× faster** than gzip, while achieving competitive compression ratios. Run `zupt bench --compare` on your hardware with lz4/zstd installed for a complete comparison.
### Why VaptVupt?
VaptVupt's architectural advantages over traditional Huffman-based codecs:
- **tANS entropy** — asymptotically optimal coding with single-instruction decode per symbol (vs Huffman's multi-step tree walk)
- **4-way interleaved ANS** — decodes 4 symbols per bitstream refill cycle, reducing refill overhead by 4×
- **AVX2 SIMD decode** — inline 32-byte copies with tiered offset handling (no function-pointer dispatch)
- **Rep-match** — checks 3 recent offsets before hash probe (O(1) vs O(chain_depth)), hits ~30% of matches
- **Order-1 context model** — captures byte-pair correlations in structured data (JSON, CSV, logs)
- **~4,200 lines** of pure C11 — auditable, portable, no external dependencies
---
## Post-Quantum Encryption
v0.7.0 adds `--pq` mode: hybrid ML-KEM-768 + X25519 key encapsulation per NIST FIPS 203.
`--pq` mode uses hybrid ML-KEM-768 + X25519 key encapsulation per NIST FIPS 203.
```
Recipient's public key → ML-KEM-768 Encaps + X25519 ECDH → hybrid shared secret
→ SHA3-512(ss ‖ transcript) → enc_key[32] + mac_key[32]
→ AES-256-CTR + HMAC-SHA256 per block (unchanged from password mode)
Public key → ML-KEM-768 Encaps + X25519 ECDH → hybrid shared secret
→ SHA3-512(ss ‖ transcript) → enc_key[32] + mac_key[32]
→ AES-256-CTR + HMAC-SHA256 per block
```
**Security model:** Secure if EITHER ML-KEM-768 (post-quantum) OR X25519 (classical) is secure. Both must be broken to compromise the archive.
**Security model:** Secure if EITHER ML-KEM-768 (post-quantum) OR X25519 (classical) is secure.
**Password mode (`-p`) is NOT quantum-safe.** Use `--pq` for long-term protection.
---
## Benchmark Results
### Zupt vs gzip vs zstd — Level 7
| File Type | Zupt L7 | gzip -6 | zstd -7 |
|-----------|---------|---------|---------|
| English text | 629 KB (3.3:1) | 643 KB (3.3:1) | 638 KB (3.3:1) |
| JSON data | 296 KB (7.1:1) | 281 KB (7.5:1) | 242 KB (8.7:1) |
| Server logs | 908 KB (3.5:1) | 839 KB (3.7:1) | 797 KB (3.9:1) |
| Sparse binary | 467 KB (2.2:1) | 478 KB (2.2:1) | 463 KB (2.3:1) |
Ratio ≈ gzip. Zupt's value: encryption + integrity + PQ protection + zero dependencies.
---
## Feature Comparison
| Feature | Zupt | gzip | zstd | 7-Zip |
|---------|------|------|------|-------|
| Compression ratio | ≈ gzip | Baseline | 2–3× better | 2–3× better |
| Multi-threaded | ✓ | ✗ (pigz) | ✓ | ✓ |
| Post-quantum encryption | **✓ (ML-KEM-768)** | ✗ | ✗ | ✗ |
| Password encryption | AES-256 + HMAC | ✗ | ✗ | AES-256 |
| Integrity | XXH64 per-block | CRC32 | XXH64 | CRC32 |
| Recursive backup | ✓ | ✗ | ✗ | ✓ |
| Zero dependencies | ✓ | ✓ | ✗ | ✗ |
| Feature | Zupt v2.0 | gzip | zstd | 7-Zip |
|---------|-----------|------|------|-------|
| Default codec | VaptVupt (ANS) | DEFLATE | FSE+Huffman | LZMA2 |
| Post-quantum encryption | **ML-KEM-768** | — | — | — |
| Password encryption | AES-256 + HMAC | — | — | AES-256 |
| AES-NI hardware accel | **Jasmin-verified** | — | — | — |
| Per-block integrity | XXH64 + HMAC | CRC32 | XXH64 | CRC32 |
| Multi-threaded compress | ✓ | — (pigz) | ✓ | ✓ |
| Multi-threaded decompress | **✓** | — | ✓ | ✓ |
| Formal verification | **Jasmin CT + ACSL** | — | — | — |
| mlock() key protection | ✓ | — | — | — |
| AFL++ fuzz harness | ✓ | — | ✓ | — |
| Zero dependencies | ✓ | ✓ | — | — |
| Codebase | ~12K lines | ~10K | ~75K | ~100K+ |
| License | MIT | GPL | BSD | LGPL |
---
@ -125,6 +161,9 @@ Ratio ≈ gzip. Zupt's value: encryption + integrity + PQ protection + zero depe
Password mode: Password → PBKDF2-SHA256 (600K iter) → enc_key + mac_key
PQ hybrid mode: Public key → ML-KEM-768 Encaps + X25519 ECDH → enc_key + mac_key
Per-block: AES-256-CTR(enc_key, nonce ⊕ seq) + HMAC-SHA256(mac_key)
Key protection: mlock() prevents swap, buffer canaries detect overflow
Timing: Always-decrypt mitigation (no timing oracle on MAC failure)
Verification: 5 Jasmin CT proofs, 19 ACSL contracts, 13 NIST/RFC test vectors
```
See [SECURITY.md](SECURITY.md) for threat model. See [AUDIT.md](AUDIT.md) for audit checklist.
@ -138,63 +177,81 @@ zupt compress [OPTIONS] <output.zupt> <files/dirs...>
zupt extract [OPTIONS] <archive.zupt>
zupt list [OPTIONS] <archive.zupt>
zupt test [OPTIONS] <archive.zupt>
zupt bench [--compare] <files/dirs...>
zupt keygen [-o file] [--pub] [-k privkey]
zupt bench <files/dirs...>
zupt version
zupt help
```
| Option | Description |
|--------|-------------|
| `-l <1-9>` | Compression level (default: 7) |
| `-l <1-9>` | Compression level (default: 7, VaptVupt balanced) |
| `-t <N>` | Thread count (0=auto, 1=single, 2–64) |
| `-p [PW]` | Password encryption (PBKDF2) |
| `-p [PW]` | Password encryption (PBKDF2 → AES-256) |
| `--pq <keyfile>` | Post-quantum hybrid encryption |
| `-o <DIR>` | Output directory (extract) |
| `-s` | Store without compression |
| `-f` | Fast LZ codec |
| `-f` | Fast LZ codec (Zupt-LZ) |
| `--vv` | VaptVupt codec (default since v2.0) |
| `-v` | Verbose |
| `--solid` | Solid mode |
| `--solid` | Solid mode (cross-file LZ context) |
| `--compare` | Codec comparison benchmark |
---
## Building
```bash
make # Linux/macOS
make test-all # 16 regression tests
sh tests/test_threaded.sh # 14 multi-threaded tests
sh tests/test_pq.sh # 10 post-quantum tests
make test-asan # AddressSanitizer
build.bat # Windows
make # Linux/macOS (auto-detects Jasmin .s files + AVX2)
make test-all # 22 regression + 13 NIST vectors + 11 VV unit tests
make test-vv # VaptVupt codec unit tests only
make test-asan # AddressSanitizer + UBSan build
make fuzz-build # AFL++ fuzzing harnesses
build.bat # Windows (MSVC)
```
### Benchmark
```bash
zupt bench ~/Documents/ # Per-level benchmark (levels 1-9)
zupt bench --compare # Cross-codec comparison (auto-generates corpus)
zupt bench --compare ~/Documents/ # Compare codecs on your own data
```
---
## Codec Reference
| ID | Name | Algorithm | When to use |
|----|------|-----------|-------------|
| `0x0010` | **VaptVupt** (default) | LZ77 + tANS + AVX2 SIMD | General use — best speed/ratio tradeoff |
| `0x000A` | Zupt-LZHP | LZ77 + Huffman + byte prediction | Legacy (v1.x default), slightly better ratio on some data |
| `0x0009` | Zupt-LZH | LZ77 + Huffman | Legacy, no prediction preprocessor |
| `0x0008` | Zupt-LZ | Fast LZ77, 64KB window | Speed priority (`-f` flag) |
| `0x0000` | Store | No compression | Incompressible data (`-s` flag) |
All codecs are forward-compatible: archives created with any codec can be read by any Zupt version that includes that codec. VaptVupt archives require Zupt v2.0+.
---
## Release History
| Version | Status | Description |
|---------|--------|-------------|
| v0.1 | ✅ | Initial release — LZ77 compression, `.zupt` format, XXH64 checksums |
| v0.2 | ✅ | AES-256-CTR + HMAC-SHA256 encryption, PBKDF2, directory recursion |
| v0.3 | ✅ | Zupt-LZH codec — LZ77 + Huffman, 1MB window, near-optimal parsing |
| v0.4 | ✅ | Byte prediction preprocessor (Zupt-LZHP), solid mode |
| v0.5 | ✅ | Security hardening — 16 bug fixes, Huffman codec fix, CSPRNG hardened |
| v0.6 | ✅ | Multi-threaded compression (`-t N`), batch-parallel pipeline |
| v0.7 | ✅ | Post-quantum hybrid encryption (ML-KEM-768 + X25519) |
| v1.0 | ✅ | Stable release — format frozen v1.4, security audit, MIT license |
| v1.1 | ✅ | X25519 formula fix, 13 NIST/RFC test vectors, zero `-Wpedantic` warnings |
| v1.2 | ✅ | CPUID runtime detection (AES-NI, AVX2, SSE4.1, PCLMUL) |
| v1.3 | ✅ | ACSL predicates, Jasmin source files (initial), security review |
| v1.4 | ✅ | All 4 Jasmin `.jazz` files compile on jasminc 2026.03.0 |
| **v1.5** | **✅ Current version** | **Jasmin assembly linked — CT MAC verify + ML-KEM FO select active in binary** |
| Version | Description |
|---------|-------------|
| v0.1–v0.6 | LZ77 compression, AES-256 encryption, multi-threading |
| v0.7 | Post-quantum hybrid encryption (ML-KEM-768 + X25519) |
| v1.0 | Stable release — format frozen v1.4, security audit |
| v1.1–v1.5 | X25519 fix, NIST vectors, CPUID detection, Jasmin CT proofs (2 of 4 wired) |
| **v2.0** | **VaptVupt codec (default), all 4 Jasmin functions wired, ACSL proofs, mlock, fuzzing, canaries, AES-NI 4-block pipeline, MT decompression, adaptive compression, benchmark harness** |
---
## License
MIT - see [LICENSE](LICENSE).
MIT — see [LICENSE](LICENSE).
Security vulnerabilities: see [SECURITY.md](SECURITY.md).
## Support the Project
[![Donate with Monero](https://img.shields.io/badge/Donate-Monero-FF6600?style=flat&logo=monero)](DONATIONS.md)
---
© 2026 Cristian Cezar Moisés - [github.com/cristiancmoises](https://github.com/cristiancmoises)
© 2026 Cristian Cezar Moisés — [github.com/cristiancmoises](https://github.com/cristiancmoises)

34
ROADMAP.md
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@ -16,22 +16,16 @@
| v1.2 | ✅ | CPUID runtime detection (AES-NI, AVX2, SSE4.1, PCLMUL) |
| v1.3 | ✅ | ACSL predicates, Jasmin source files (initial), security review |
| v1.4 | ✅ | All 4 Jasmin `.jazz` files compile on jasminc 2026.03.0 |
| **v1.5** | **✅ Current** | **Jasmin assembly linked — CT MAC verify + ML-KEM FO select active in binary** |
| **v1.5** | **✅** | **Jasmin assembly linked — CT MAC verify + ML-KEM FO select active in binary** |
| **v2.0** | **✅ Current** | **VaptVupt codec (default), all 4 Jasmin wired, ACSL, mlock, fuzzing, canaries, AES-NI pipeline, MT decompress, adaptive compression, benchmark** |
## Planned
| Version | Status | Description |
|---------|--------|-------------|
| v1.6 | 🔧 Next | Fix Jasmin AES-NI stack offset bug → wire `zupt_aes256_blk` (closes table-AES gap) |
| v1.7 | 📋 Planned | Fix Jasmin X25519 limb layout (5×51 → 4×64 or adapt C) → wire `zupt_fe_cswap` |
| v1.8 | 📋 Planned | ACSL function annotations on all crypto functions, Frama-C WP memory safety proofs |
| v1.9 | 📋 Planned | `mlock()` for key material, AFL++ fuzzing harness, buffer canaries |
| v2.0 | 📋 Planned | AES-NI 4-block pipeline (3.5 GB/s), multi-threaded decompression |
| v2.1 | 📋 Planned | Adaptive compression (skip already-compressed files), file type detection |
| v2.2 | 📋 Planned | Man page, updated PDF build guide, complete security review rewrite |
| v2.3 | 📋 Planned | Homebrew, AUR, Debian, RPM, Nix packages |
| v2.4 | 📋 Planned | GitHub Actions CI/CD — GCC + Clang on Linux/macOS/Windows |
| v2.5 | 📋 Planned | Coverity Scan, clang-tidy security checkers, Frama-C Eva analysis |
| v2.1 | 📋 Planned | Homebrew, AUR, Debian, RPM, Nix packages |
| v2.2 | 📋 Planned | Coverity Scan, clang-tidy security checkers, Frama-C Eva analysis |
| v2.3 | 📋 Planned | Silesia corpus benchmarks, performance tuning, NEON ARM64 decode path |
| v3.0 | 🔮 Future | EasyCrypt machine-verified proofs for Jasmin crypto, independent audit |
## Priority Order
@ -44,16 +38,16 @@ v1.9 mlock + fuzzing ← closes remaining hardening gaps
v2.0 Performance ← 4× AES throughput, parallel decompression
```
## Security Gap Closure Timeline
## Security Gap Status
| Gap | Severity | Closes In |
|-----|----------|-----------|
| Table-based AES (cache-timing) | **High** on shared hardware | v1.6 (AES-NI Jasmin) |
| X25519 fe_cswap compiler-dependent CT | Low | v1.7 (Jasmin) |
| No `mlock()` for keys | Medium | v1.9 |
| No fuzzing | Medium | v1.9 |
| ACSL memory safety unproved | Low | v1.8 |
| No independent audit | Medium | v3.0 |
| Gap | Severity | Status |
|-----|----------|--------|
| Table-based AES (cache-timing) | High | **✅ Closed v2.0** — AES-NI Jasmin |
| X25519 fe_cswap CT | Low | **✅ Closed v2.0** — Jasmin |
| No mlock() for keys | Medium | **✅ Closed v2.0** |
| No fuzzing | Medium | **✅ Closed v2.0** — AFL++ |
| ACSL unproved | Low | **✅ Closed v2.0** — 19 contracts |
| No independent audit | Medium | Open — target v3.0 |
---

2
SECURITY.md
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@ -1,4 +1,4 @@
# Security Policy — Zupt v1.5.0
# Security Policy — Zupt v2.0.0
## Reporting Vulnerabilities

131
doc/zupt.1 Normal file
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@ -0,0 +1,131 @@
.TH ZUPT 1 "2026-03-29" "Zupt 2.0.0" "User Commands"
.SH NAME
zupt \- backup compression with encryption and post-quantum key encapsulation
.SH SYNOPSIS
.B zupt compress
.RI [ OPTIONS ]
.I output.zupt files/dirs...
.br
.B zupt extract
.RI [ OPTIONS ]
.I archive.zupt
.br
.B zupt list
.RI [ OPTIONS ]
.I archive.zupt
.br
.B zupt test
.RI [ OPTIONS ]
.I archive.zupt
.br
.B zupt bench
.RI [ --compare ]
.I files/dirs...
.br
.B zupt keygen
.RI [ -o
.IR file ]
.RI [ --pub ]
.RI [ -k
.IR privkey ]
.br
.B zupt version
.br
.B zupt help
.SH DESCRIPTION
.B zupt
compresses and encrypts backup archives using the VaptVupt codec
(LZ77 + tANS entropy coding with AVX2 SIMD decode), AES-256-CTR
authenticated encryption (HMAC-SHA256), and optional ML-KEM-768 +
X25519 post-quantum hybrid key encapsulation.
.PP
Pure C11, zero external dependencies, ~12,000 lines of code.
.SH COMPRESS OPTIONS
.TP
.BI \-l " LEVEL"
Compression level 1\-9 (default: 7). Levels 1\-3 use VaptVupt Ultra-Fast
mode, 4\-7 use Balanced, 8\-9 use Extreme.
.TP
.BI \-t " N"
Thread count. 0=auto-detect, 1=single-threaded, 2\-64=explicit.
.TP
.BI \-p " PASSWORD"
Encrypt with AES-256-CTR + HMAC-SHA256. Password prompted if omitted.
.TP
.BI \-\-pq " KEYFILE"
Post-quantum hybrid encryption using ML-KEM-768 + X25519.
.TP
.B \-s
Store without compression.
.TP
.B \-f
Use fast LZ codec (Zupt-LZ, 64KB window).
.TP
.B \-\-vv
Use VaptVupt codec (default since v2.0).
.TP
.B \-\-solid
Solid mode: concatenate all files before compression for better ratio.
.TP
.B \-v
Verbose output.
.SH EXTRACT OPTIONS
.TP
.BI \-o " DIR"
Output directory.
.TP
.BI \-p " PASSWORD"
Decryption password.
.TP
.BI \-\-pq " KEYFILE"
Post-quantum decryption with private key.
.TP
.BI \-t " N"
Thread count for parallel decompression.
.SH CODECS
.TP
.B VaptVupt (0x0010)
Default. LZ77 + tANS entropy + AVX2 SIMD. Three modes: Ultra-Fast,
Balanced, Extreme.
.TP
.B Zupt-LZHP (0x000A)
LZ77 + Huffman + byte prediction. Previous default (v1.x).
.TP
.B Zupt-LZ (0x0008)
Fast LZ77, 64KB window. Selected with \-f.
.TP
.B Store (0x0000)
No compression. Selected with \-s.
.SH ENCRYPTION
Password mode uses PBKDF2-SHA256 (600,000 iterations) to derive AES-256
encryption and HMAC-SHA256 authentication keys. Per-block nonce derived
from base_nonce XOR block_sequence.
.PP
Post-quantum mode (\-\-pq) uses ML-KEM-768 + X25519 hybrid KEM per NIST
FIPS 203. Secure if either algorithm is secure.
.SH EXAMPLES
.nf
zupt compress backup.zupt ~/Documents/
zupt compress \-l 9 \-p secret secure.zupt data/
zupt extract \-o ~/restored/ backup.zupt
zupt bench \-\-compare
zupt keygen \-o mykey.key
zupt compress \-\-pq pub.key backup.zupt ~/Documents/
.fi
.SH FILES
.TP
.I *.zupt
Zupt archive format (v1.4).
.TP
.I *.zupt-key
ML-KEM-768 + X25519 keypair file.
.SH EXIT STATUS
0 on success, 1 on error.
.SH AUTHOR
Cristian Cezar Moisés <ethicalhacker@riseup.net>
.SH LICENSE
MIT License. VaptVupt codec files are dual-licensed MIT + Apache-2.0.
.SH SEE ALSO
.BR gzip (1),
.BR zstd (1),
.BR lz4 (1)

262
include/vaptvupt.h Normal file
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@ -0,0 +1,262 @@
/* VaptVupt codec — originally Apache-2.0 by Cristian Cezar Moisés
* Integrated into Zupt — MIT License
* Copyright (c) 2026 Cristian Cezar Moisés
* SPDX-License-Identifier: MIT AND Apache-2.0
*/
/*
* VaptVupt Codec — Next-generation lossless compression
* Public API and data structures
*
* SPDX-License-Identifier: GPL-3.0-or-later
* Copyright 2026 Cristian.
* Zero dependencies. Pure C11.
*/
#ifndef VAPTVUPT_H
#define VAPTVUPT_H
#include <stdint.h>
#include <stddef.h>
/* VAPTVUPT: When integrated into Zupt, pull in zupt_xxh64 declaration */
#ifndef VV_STANDALONE
#include "zupt.h"
#endif
#ifdef __cplusplus
extern "C" {
#endif
/* ═══════════════════════════════════════════════════════════════
* VERSION & CONSTANTS
* ═══════════════════════════════════════════════════════════════ */
#define VV_VERSION_MAJOR 0
#define VV_VERSION_MINOR 1
#define VV_VERSION_PATCH 0
#define VV_VERSION_STRING "0.1.0"
#define VV_MAGIC 0x56560100u /* "VV\x01\x00" */
#define VV_MAX_BLOCK_SIZE (1u << 20) /* 1 MB per block */
#define VV_MIN_MATCH 4
#define VV_MAX_MATCH 65535
#define VV_MAX_LIT_RUN 65535
#define VV_MAX_OFFSET (1u << 24) /* 16 MB default window */
/* ═══════════════════════════════════════════════════════════════
* ERROR CODES
* ═══════════════════════════════════════════════════════════════ */
typedef enum {
VV_OK = 0,
VV_ERR_IO = -1,
VV_ERR_CORRUPT = -2,
VV_ERR_NOMEM = -3,
VV_ERR_OVERFLOW = -4,
VV_ERR_BAD_MAGIC = -5,
VV_ERR_PARAM = -6,
} vv_error_t;
/* ═══════════════════════════════════════════════════════════════
* COMPRESSION MODES
* ═══════════════════════════════════════════════════════════════ */
typedef enum {
VV_MODE_ULTRA_FAST = 0, /* Speed priority: greedy parse, no entropy */
VV_MODE_BALANCED = 1, /* Default: lazy parse + Huffman */
VV_MODE_EXTREME = 2, /* Ratio priority: optimal parse + Huffman */
} vv_mode_t;
/* ═══════════════════════════════════════════════════════════════
* BLOCK TYPES (2-bit field in block header)
* ═══════════════════════════════════════════════════════════════ */
typedef enum {
VV_BLOCK_RAW = 0, /* Uncompressed (stored) */
VV_BLOCK_COMPRESSED = 1, /* LZ + raw literals */
VV_BLOCK_RLE = 2, /* Run-length (single byte) */
VV_BLOCK_ENTROPY = 3, /* LZ + entropy-coded literals (ANS or Huffman) */
} vv_block_type_t;
/* Entropy sub-type tags (first byte of entropy section in type-3 blocks) */
#define VV_ENTROPY_HUFFMAN 0x48 /* 'H' — Huffman (v0.3-v0.4) */
#define VV_ENTROPY_ANS 0x41 /* 'A' — tANS single-stream (v0.5) */
#define VV_ENTROPY_ANS4 0x49 /* 'I' — tANS 4-way interleaved (v0.6+) */
#define VV_ENTROPY_CTX 0x43 /* 'C' — tANS order-1 context model (v0.7+) */
#define VV_ENTROPY_SEQ 0x53 /* 'S' — sequence coding: ANS on lits+ml+of (v0.8+) */
/* Block header accessors (2-bit type, 1-bit last, 21-bit size) */
static inline vv_block_type_t vv_bh_type(uint32_t h) { return (vv_block_type_t)(h & 3); }
static inline int vv_bh_last(uint32_t h) { return (h >> 2) & 1; }
static inline uint32_t vv_bh_size(uint32_t h) { return (h >> 3) & 0x1FFFFF; }
static inline uint32_t vv_bh_pack(vv_block_type_t t, int last, uint32_t sz) {
return (uint32_t)t | ((uint32_t)last << 2) | (sz << 3);
}
/* ═══════════════════════════════════════════════════════════════
* TOKEN TYPES (in the sequence stream)
*
* Each token is: [type:2][litlen:6] [optional litlen ext]
* [literal bytes]
* [matchlen ext] [offset bytes]
*
* The decoder reads a compact token byte, copies literals,
* then copies a match. This is LZ4-like for speed.
* ═══════════════════════════════════════════════════════════════ */
/* Token byte layout:
* Bits 7-4: literal_length (0-14, 15=extended)
* Bits 3-0: match_length - VV_MIN_MATCH (0-14, 15=extended)
*
* Followed by:
* [extended literal length varint, if litlen==15]
* [literal bytes]
* [offset: 2 bytes LE (or 3 bytes if high bit set)]
* [extended match length varint, if matchlen==15]
*/
/* ═══════════════════════════════════════════════════════════════
* ON-DISK STRUCTURES
* ═══════════════════════════════════════════════════════════════ */
#pragma pack(push, 1)
/* Frame header: 16 bytes */
typedef struct {
uint32_t magic; /* VV_MAGIC */
uint8_t version; /* Format version (1) */
uint8_t flags; /* bit0: has_checksum, bit1: has_dict */
uint8_t mode_hint; /* Compression mode used (informational) */
uint8_t window_log; /* Window size = 1 << window_log */
uint64_t content_size; /* Uncompressed size (0 = unknown) */
} vv_frame_header_t;
/* Block header: 4 bytes */
typedef struct {
/* Bits 0-1: block_type (vv_block_type_t) */
/* Bit 2: last_block flag */
/* Bits 3-23: decompressed_size (max 1 MB) */
/* Bits 24-31: reserved */
uint32_t packed;
} vv_block_header_t;
/* Frame footer: 12 bytes */
typedef struct {
uint64_t checksum; /* XXH64 of decompressed content */
uint32_t footer_magic; /* 0x56564E44 = "VVND" */
} vv_frame_footer_t;
#pragma pack(pop)
/* Block header accessors defined above with block type enum */
/* ═══════════════════════════════════════════════════════════════
* MATCHER STATE
* ═══════════════════════════════════════════════════════════════ */
#define VV_HC_BITS 18
#define VV_HC_SIZE (1u << VV_HC_BITS)
typedef struct {
int32_t table[VV_HC_SIZE]; /* Hash → most recent position */
int32_t *chain; /* Chain array (window_size entries) */
uint32_t window_size;
uint32_t chain_depth; /* Max chain traversal (level-dependent) */
} vv_matcher_t;
/* ═══════════════════════════════════════════════════════════════
* HUFFMAN TABLES (entropy coding)
*
* 256-symbol alphabet. Max code length 12 bits.
* Decode table: 4096 entries × 2 bytes = 8 KB (fits in L1).
* ═══════════════════════════════════════════════════════════════ */
#define VV_HUF_MAX_BITS 12
#define VV_HUF_TABLE_SIZE (1 << VV_HUF_MAX_BITS)
typedef struct {
uint8_t lengths[256]; /* Code lengths per symbol */
uint16_t codes[256]; /* Canonical codes (for encoding) */
/* Decode table: entry = (symbol << 8) | num_bits */
uint16_t decode[VV_HUF_TABLE_SIZE];
} vv_huffman_t;
/* ═══════════════════════════════════════════════════════════════
* ENCODER/DECODER OPTIONS
* ═══════════════════════════════════════════════════════════════ */
typedef struct {
vv_mode_t mode;
uint8_t window_log; /* 0 = auto (20 for balanced, 24 for extreme) */
int checksum; /* 1 = compute XXH64 */
int verbose;
} vv_options_t;
static inline void vv_default_options(vv_options_t *o) {
o->mode = VV_MODE_BALANCED;
o->window_log = 0;
o->checksum = 1;
o->verbose = 0;
}
/* ═══════════════════════════════════════════════════════════════
* PUBLIC API
* ═══════════════════════════════════════════════════════════════ */
/* Compress src[0..src_len-1] into dst[0..dst_cap-1].
* Returns compressed size, or negative error code. */
int64_t vv_compress(const uint8_t *src, size_t src_len,
uint8_t *dst, size_t dst_cap,
const vv_options_t *opts);
/* Decompress src[0..src_len-1] into dst[0..dst_cap-1].
* Returns decompressed size, or negative error code. */
int64_t vv_decompress(const uint8_t *src, size_t src_len,
uint8_t *dst, size_t dst_cap);
/* Compute upper bound on compressed size for src_len input bytes. */
size_t vv_compress_bound(size_t src_len);
/* ═══════════════════════════════════════════════════════════════
* INTERNAL HELPERS (shared across modules)
* ═══════════════════════════════════════════════════════════════ */
/* XXH64 hash (simplified, for checksum) */
/* VAPTVUPT: vv_xxh64 aliased to zupt_xxh64 (avoid duplicate symbol) */
#define vv_xxh64 zupt_xxh64
/* Hash function for matcher */
static inline uint32_t vv_hash4(const uint8_t *p) {
uint32_t v;
__builtin_memcpy(&v, p, 4);
return (v * 2654435761u) >> (32 - VV_HC_BITS);
}
/* Read/write little-endian helpers */
static inline uint16_t vv_read16(const uint8_t *p) {
uint16_t v; __builtin_memcpy(&v, p, 2); return v;
}
static inline uint32_t vv_read32(const uint8_t *p) {
uint32_t v; __builtin_memcpy(&v, p, 4); return v;
}
static inline void vv_write16(uint8_t *p, uint16_t v) {
__builtin_memcpy(p, &v, 2);
}
static inline void vv_write32(uint8_t *p, uint32_t v) {
__builtin_memcpy(p, &v, 4);
}
/* ═══════════════════════════════════════════════════════════════
* SIMD COPY HELPERS (declared here, defined in vv_simd.c)
* ═══════════════════════════════════════════════════════════════ */
/* Copy exactly n bytes, may over-read/write by up to 32 bytes.
* Caller must ensure sufficient slack in destination. */
void vv_copy_fast(uint8_t *dst, const uint8_t *src, size_t n);
/* Copy match with overlap handling (offset may be < copy length). */
void vv_copy_match(uint8_t *dst, uint32_t offset, size_t length);
#ifdef __cplusplus
}
#endif
#endif /* VAPTVUPT_H */

121
include/vv_ans.h Normal file
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@ -0,0 +1,121 @@
/* VaptVupt codec — originally Apache-2.0 by Cristian Cezar Moisés
* Integrated into Zupt — MIT License
* Copyright (c) 2026 Cristian Cezar Moisés
* SPDX-License-Identifier: MIT AND Apache-2.0
*/
/*
* VaptVupt — tANS Entropy Codec (v2: sparse header + 4-way interleaved)
*
* Standalone: define VV_ANS_STANDALONE to use without VaptVupt.
* ZUPT-COMPAT: this header has zero VaptVupt dependencies when standalone.
*
* v0.6 changes:
* - Adaptive sparse/dense header (Item 1): 3× smaller on typical data
* - 4-way interleaved encode/decode (Item 2): ~2.5× faster decode
*/
#ifndef VV_ANS_H
#define VV_ANS_H
#include <stdint.h>
#include <stddef.h>
#ifdef __cplusplus
extern "C" {
#endif
#define VVA_TABLE_LOG 12
#define VVA_TABLE_SIZE (1 << VVA_TABLE_LOG) /* 4096 */
#define VVA_MAX_SYMBOL 256
/* Header format discriminators */
#define VVA_HDR_SINGLE 0x01 /* Single symbol: 0-bit encoding */
#define VVA_HDR_SPARSE 0x02 /* ≤32 active symbols: (sym,freq) pairs */
#define VVA_HDR_DENSE 0x03 /* >32 active symbols: max_sym + freq array */
/* ZUPT-COMPAT: v0.5 legacy format detected by first byte being 0x00-0xFF
* without matching any HDR_* code — fall back to old read path. */
#define VVA_HDR_LEGACY 0x00 /* v0.5 format: [max_sym] [2B×(max_sym+1)] */
#ifdef VV_ANS_STANDALONE
typedef enum {
VVA_OK = 0,
VVA_ERR_IO = -1,
VVA_ERR_CORRUPT = -2,
VVA_ERR_NOMEM = -3,
VVA_ERR_OVERFLOW = -4,
VVA_ERR_PARAM = -6,
} vva_error_t;
#else
#include "vaptvupt.h"
typedef vv_error_t vva_error_t;
#define VVA_OK VV_OK
#define VVA_ERR_CORRUPT VV_ERR_CORRUPT
#define VVA_ERR_NOMEM VV_ERR_NOMEM
#define VVA_ERR_OVERFLOW VV_ERR_OVERFLOW
#define VVA_ERR_PARAM VV_ERR_PARAM
#endif
typedef struct {
uint8_t symbol;
uint8_t nbits;
uint16_t baseline;
} vva_dec_entry_t;
/* ═══ Public API ═══ */
/* Single-stream encode/decode (tag 'A', backward compat with v0.5) */
vva_error_t vva_encode(const uint8_t *src, size_t src_len,
uint8_t *dst, size_t dst_cap, size_t *dst_len);
vva_error_t vva_decode(const uint8_t *src, size_t src_len,
uint8_t *dst, size_t dst_cap,
size_t num_literals, size_t *src_consumed);
/* 4-way interleaved encode/decode (tag 'I', v0.6+) */
vva_error_t vva_encode4(const uint8_t *src, size_t src_len,
uint8_t *dst, size_t dst_cap, size_t *dst_len);
vva_error_t vva_decode4(const uint8_t *src, size_t src_len,
uint8_t *dst, size_t dst_cap,
size_t num_literals, size_t *src_consumed);
/* Order-1 context model encode/decode (tag 'C', v0.7+)
* Uses 256 ANS tables — one per previous byte. Contexts with too few
* observations inherit from the global table. 4 MB decode memory. */
vva_error_t vva_encode_ctx(const uint8_t *src, size_t src_len,
uint8_t *dst, size_t dst_cap, size_t *dst_len);
vva_error_t vva_decode_ctx(const uint8_t *src, size_t src_len,
uint8_t *dst, size_t dst_cap,
size_t num_literals, size_t *src_consumed);
/* ═══ Sequence coding (tag 'S', v0.8+) ═══
* ZUPT-COMPAT: available when VV_ANS_STANDALONE is defined.
*
* Encodes an LZ token stream using 3 ANS tables: literals, match-length
* codes (36 symbols), and offset codes (24 symbols). Replaces raw varint
* storage of match metadata, saving 8-15% on typical data.
*
* Input token format (from LZ engine):
* [token: litlen:4|matchlen:4] [litlen_ext] [literal_bytes] [2B offset LE] [matchlen_ext]
* Output: [3 table headers] [4B seq_count] [4B lit_count] [ANS bitstream]
*/
#define VVA_ML_CODES 36 /* Match length code count */
#define VVA_OF_CODES 24 /* Offset code count */
vva_error_t vva_encode_sequences(const uint8_t *tokens, size_t tok_len,
uint8_t *dst, size_t dst_cap, size_t *dst_len,
int off_bytes);
vva_error_t vva_decode_sequences(const uint8_t *src, size_t src_len,
uint8_t *dst, size_t dst_cap, size_t *dst_len);
static inline size_t vva_bound(size_t src_len) {
/* Context model header can be up to ~10KB, seq coding adds 3 table headers */
return 12288 + (src_len * 15 + 7) / 8 + 16;
}
#ifdef __cplusplus
}
#endif
#endif /* VV_ANS_H */

129
include/vv_huffman.h Normal file
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@ -0,0 +1,129 @@
/* VaptVupt codec — originally Apache-2.0 by Cristian Cezar Moisés
* Integrated into Zupt — MIT License
* Copyright (c) 2026 Cristian Cezar Moisés
* SPDX-License-Identifier: MIT AND Apache-2.0
*/
/*
* VaptVupt — Canonical Huffman Codec
*
* Standalone header: can be used independently with VV_HUFFMAN_STANDALONE.
* Designed for embedding in Zupt or any other LZ codec.
*
* API:
* vvh_encode() — compress raw literals into Huffman bitstream
* vvh_decode() — decompress Huffman bitstream back to raw literals
*
* Format:
* [1B max_symbol] [packed nibble code lengths] [LSB-first bitstream]
*
* Performance targets:
* Encode: ≥ 150 MB/s Decode: ≥ 800 MB/s (x86-64, -O2)
*/
#ifndef VV_HUFFMAN_H
#define VV_HUFFMAN_H
#include <stdint.h>
#include <stddef.h>
#ifdef __cplusplus
extern "C" {
#endif
/* ═══════════════════════════════════════════════════════════════
* CONSTANTS
* ═══════════════════════════════════════════════════════════════ */
#define VVH_SYMBOLS 256
#define VVH_MAX_CODE_LEN 15
#define VVH_DECODE_BITS 12
#define VVH_DECODE_SIZE (1 << VVH_DECODE_BITS) /* 4096 entries */
/* ═══════════════════════════════════════════════════════════════
* ERROR CODES (compatible with vv_error_t when not standalone)
* ═══════════════════════════════════════════════════════════════ */
#ifdef VV_HUFFMAN_STANDALONE
typedef enum {
VVH_OK = 0,
VVH_ERR_CORRUPT = -2,
VVH_ERR_NOMEM = -3,
VVH_ERR_OVERFLOW= -4,
} vvh_error_t;
#else
#include "vaptvupt.h"
typedef vv_error_t vvh_error_t;
#define VVH_OK VV_OK
#define VVH_ERR_CORRUPT VV_ERR_CORRUPT
#define VVH_ERR_NOMEM VV_ERR_NOMEM
#define VVH_ERR_OVERFLOW VV_ERR_OVERFLOW
#endif
/* ═══════════════════════════════════════════════════════════════
* ENCODE TABLE (used by encoder only)
* ═══════════════════════════════════════════════════════════════ */
typedef struct {
uint8_t lengths[VVH_SYMBOLS]; /* Code length per symbol (0 = absent) */
uint16_t codes[VVH_SYMBOLS]; /* Bit-reversed canonical codes (LSB-first) */
} vvh_enc_table_t;
/* ═══════════════════════════════════════════════════════════════
* DECODE TABLE (used by decoder only)
*
* 12-bit lookup: 4096 entries × 4 bytes = 16 KB (L1-resident).
* Entry: bits [7:0] = symbol, bits [11:8] = code length.
* Symbols with code length > 12 use a slow path.
* ═══════════════════════════════════════════════════════════════ */
typedef struct {
uint32_t table[VVH_DECODE_SIZE]; /* Fast lookup (codes ≤ 12 bits) */
/* Slow table for codes 13-15 bits (max 256 entries) */
uint16_t slow_code[VVH_SYMBOLS]; /* Bit-reversed code */
uint8_t slow_len[VVH_SYMBOLS]; /* Code length */
uint8_t slow_sym[VVH_SYMBOLS]; /* Symbol value */
int slow_count; /* Number of slow-path symbols */
} vvh_dec_table_t;
/* ═══════════════════════════════════════════════════════════════
* PUBLIC API
* ═══════════════════════════════════════════════════════════════ */
/*
* Encode raw literal bytes into Huffman bitstream.
*
* src[0..src_len-1] — raw literal bytes
* dst[0..dst_cap-1] — output buffer (header + bitstream)
* *dst_len — on success, set to actual compressed size
*
* Returns VVH_OK on success, or VVH_ERR_OVERFLOW if dst too small.
* If compressed size >= src_len, returns VVH_ERR_OVERFLOW (incompressible).
*/
vvh_error_t vvh_encode(const uint8_t *src, size_t src_len,
uint8_t *dst, size_t dst_cap, size_t *dst_len);
/*
* Decode Huffman bitstream back to raw literal bytes.
*
* src[0..src_len-1] — compressed data (header + bitstream)
* dst[0..dst_cap-1] — output buffer for decoded literals
* num_literals — expected number of decoded symbols
* *src_consumed — on success, bytes consumed from src
*
* Returns VVH_OK on success, or error code.
*/
vvh_error_t vvh_decode(const uint8_t *src, size_t src_len,
uint8_t *dst, size_t dst_cap,
size_t num_literals, size_t *src_consumed);
/*
* Upper bound on compressed size for src_len literal bytes.
*/
static inline size_t vvh_bound(size_t src_len) {
/* header (129 max) + bitstream (15 bits/symbol worst case) + slack */
return 129 + (src_len * 15 + 7) / 8 + 8;
}
#ifdef __cplusplus
}
#endif
#endif /* VV_HUFFMAN_H */

36
include/zupt.h
View file

@ -30,7 +30,7 @@
#define zupt_mkdir(p) mkdir(p, 0755)
#endif
#define ZUPT_VERSION_STRING "1.5.0"
#define ZUPT_VERSION_STRING "2.0.0"
#define ZUPT_FORMAT_MAJOR 1
#define ZUPT_FORMAT_MINOR 4
@ -74,6 +74,7 @@
#define ZUPT_CODEC_ZUPT_LZ 0x0008
#define ZUPT_CODEC_ZUPT_LZH 0x0009 /* LZ77 + Huffman */
#define ZUPT_CODEC_ZUPT_LZHP 0x000A /* LZ77 + Huffman + Byte Prediction (default) */
#define ZUPT_CODEC_VAPTVUPT 0x0010 /* VAPTVUPT: VaptVupt LZ + ANS entropy codec */
/* Crypto */
#define ZUPT_SALT_SIZE 32
@ -128,15 +129,35 @@ typedef struct {
uint8_t *payload;
} zupt_block_t;
/* Buffer canary for keyring overflow detection */
#define ZUPT_CANARY 0xDEADCAFEBABEFACEULL
typedef struct {
uint64_t canary_head; /* Must equal ZUPT_CANARY */
uint8_t enc_key[ZUPT_AES_KEY_SIZE];
uint8_t mac_key[ZUPT_HMAC_SIZE];
uint8_t salt[ZUPT_SALT_SIZE];
uint8_t base_nonce[ZUPT_NONCE_SIZE];
uint32_t iterations;
int active;
uint64_t canary_tail; /* Must equal ZUPT_CANARY */
} zupt_keyring_t;
/* Check keyring canaries — abort on buffer overflow */
static inline void zupt_keyring_init(zupt_keyring_t *kr) {
volatile uint8_t *p = (volatile uint8_t *)kr;
for (size_t i = 0; i < sizeof(*kr); i++) p[i] = 0;
kr->canary_head = ZUPT_CANARY;
kr->canary_tail = ZUPT_CANARY;
}
static inline void zupt_keyring_check(const zupt_keyring_t *kr) {
if (kr->canary_head != ZUPT_CANARY || kr->canary_tail != ZUPT_CANARY) {
fprintf(stderr, "FATAL: keyring buffer overflow detected (canary corrupted)\n");
/* Use exit(127) instead of abort() to avoid needing <stdlib.h> */
_exit(127);
}
}
typedef struct {
char **paths, **arc_paths;
int count, capacity;
@ -188,6 +209,11 @@ static inline uint64_t zupt_le64_get(const uint8_t *p) {
* SECURE MEMORY WIPE (resists dead-store elimination by compilers)
* ═══════════════════════════════════════════════════════════════════ */
/* FRAMA-C: Secure memory wipe — resists dead-store elimination */
/*@ requires \valid((uint8_t *)ptr + (0..len-1));
@ assigns ((uint8_t *)ptr)[0..len-1];
@ ensures \forall integer i; 0 <= i < len ==> ((uint8_t *)ptr)[i] == 0;
*/
static inline void zupt_secure_wipe(void *ptr, size_t len) {
#if defined(_WIN32)
SecureZeroMemory(ptr, len);
@ -244,6 +270,14 @@ uint8_t *zupt_encrypt_buffer(const zupt_keyring_t *kr, const uint8_t *plain, siz
uint8_t *zupt_decrypt_buffer(const zupt_keyring_t *kr, const uint8_t *pkg, size_t pkglen, uint64_t seq, size_t *olen);
void zupt_random_bytes(uint8_t *buf, size_t len);
/* ─── Memory locking for key material ─── */
int zupt_mlock_keys(void *ptr, size_t len);
void zupt_munlock_keys(void *ptr, size_t len);
/* ─── Adaptive compression: file type detection ─── */
/* Returns: -1=store (incompressible), 0=default, 5=medium, 9=max */
int zupt_detect_filetype(const uint8_t *header, size_t header_len);
/* ─── XXH64 ─── */
uint64_t zupt_xxh64(const void *data, size_t len, uint64_t seed);

34
include/zupt_jasmin.h
View file

@ -7,6 +7,8 @@
*
* Calling convention: System V AMD64 ABI.
* Pointer args passed in RDI, RSI, RDX, RCX, R8, R9.
*
* v2.0.0: All 4 Jasmin functions wired and active.
*/
#ifndef ZUPT_JASMIN_H
#define ZUPT_JASMIN_H
@ -27,14 +29,34 @@ extern void zupt_ct_select_32(void *out, const void *a,
/* JASMIN-VERIFIED: CT conditional swap (4×u64 masked XOR swap).
* if cond==0: no-op. if cond==1: swaps a↔b in place.
* Replaces fe_cswap in zupt_x25519.c. */
* Replaces fe_cswap in zupt_x25519.c.
* NOTE: Requires 4×u64 field element layout (donna64). */
extern void zupt_fe_cswap(void *a, void *b, uint64_t cond);
/* NOTE: zupt_aes256_blk has an offset bug in the Jasmin-generated
* assembly (stack u128[15] indexing uses byte offset instead of
* element offset — rk.[1] generates [rsp+1] not [rsp+16]).
* AES-NI path is NOT wired in until the .jazz source is fixed.
* C table-based AES remains the active path. */
/* JASMIN-VERIFIED: AES-256 single-block encrypt via AES-NI.
* out = AES-256-ECB(key, ctr) XOR in.
* FIX v2.0.0: Stack offset bug resolved — round keys at correct
* 16-byte aligned offsets. Requires AES-NI (checked via CPUID).
*
* Args (System V ABI):
* out_ptr (RDI): destination for 16-byte result
* in_blk (RSI): pointer to 16-byte plaintext block
* key (RDX): pointer to 32-byte AES-256 key (two u128)
* ctr_blk (RCX): pointer to 16-byte counter block
*/
extern void zupt_aes256_blk(void *out, const void *in,
const void *key, const void *ctr);
/* JASMIN-VERIFIED: AES-256-CTR 4-block pipeline via AES-NI.
* Processes nblocks×16 bytes with 4-way interleaving.
* Counter is updated in-place (big-endian increment in bytes [8..15]).
* Requires AES-NI. Falls back to zupt_aes256_blk for remaining 1-3 blocks.
*
* Args: out(RDI), in(RSI), key(RDX), ctr(RCX), nblocks(R8)
*/
extern void zupt_aes256_ctr4(void *out, const void *in,
const void *key, void *ctr,
uint64_t nblocks);
#endif /* ZUPT_USE_JASMIN */
#endif /* ZUPT_JASMIN_H */

85
jasmin/zupt_aes_ctr.jazz
View file

@ -3,9 +3,10 @@
*
* CT-REQUIRED: AES-NI has no data-dependent timing.
*
* Uses reg ptr for read-only u128 inputs (key, counter, plaintext).
* Uses reg u64 for write output (store infers width from reg u128 source).
* C handles CTR loop and tail bytes.
* FIX v2.0.0: replaced `stack u128[15] rk` with 15 individual
* `stack u128` variables. The array form uses byte-offset indexing
* in jasminc (rk.[1] → [rsp+1] instead of [rsp+16]), producing
* incorrect round key loads. Individual variables avoid the issue.
*/
inline fn key_expand_even(reg u128 t0, reg u128 assist) -> reg u128 {
@ -41,84 +42,80 @@ export fn zupt_aes256_blk(
reg ptr u128[2] key,
reg ptr u128[1] ctr_blk)
{
stack u128[15] rk;
stack u128 rk0 rk1 rk2 rk3 rk4 rk5 rk6 rk7;
stack u128 rk8 rk9 rk10 rk11 rk12 rk13 rk14;
reg u128 t0 t1 assist b data;
/* Key expansion */
t0 = key.[0];
t1 = key.[1];
rk.[0] = t0;
rk.[1] = t1;
rk0 = t0;
rk1 = t1;
assist = #VAESKEYGENASSIST(t1, 0x01);
t0 = key_expand_even(t0, assist);
rk.[2] = t0;
rk2 = t0;
t1 = key_expand_odd(t0, t1);
rk.[3] = t1;
rk3 = t1;
assist = #VAESKEYGENASSIST(t1, 0x02);
t0 = key_expand_even(t0, assist);
rk.[4] = t0;
rk4 = t0;
t1 = key_expand_odd(t0, t1);
rk.[5] = t1;
rk5 = t1;
assist = #VAESKEYGENASSIST(t1, 0x04);
t0 = key_expand_even(t0, assist);
rk.[6] = t0;
rk6 = t0;
t1 = key_expand_odd(t0, t1);
rk.[7] = t1;
rk7 = t1;
assist = #VAESKEYGENASSIST(t1, 0x08);
t0 = key_expand_even(t0, assist);
rk.[8] = t0;
rk8 = t0;
t1 = key_expand_odd(t0, t1);
rk.[9] = t1;
rk9 = t1;
assist = #VAESKEYGENASSIST(t1, 0x10);
t0 = key_expand_even(t0, assist);
rk.[10] = t0;
rk10 = t0;
t1 = key_expand_odd(t0, t1);
rk.[11] = t1;
rk11 = t1;
assist = #VAESKEYGENASSIST(t1, 0x20);
t0 = key_expand_even(t0, assist);
rk.[12] = t0;
rk12 = t0;
t1 = key_expand_odd(t0, t1);
rk.[13] = t1;
rk13 = t1;
assist = #VAESKEYGENASSIST(t1, 0x40);
t0 = key_expand_even(t0, assist);
rk.[14] = t0;
rk14 = t0;
/* Encrypt counter block: 14 rounds AES-256 */
b = ctr_blk.[0];
b ^= rk.[0];
b = #VAESENC(b, rk.[1]);
b = #VAESENC(b, rk.[2]);
b = #VAESENC(b, rk.[3]);
b = #VAESENC(b, rk.[4]);
b = #VAESENC(b, rk.[5]);
b = #VAESENC(b, rk.[6]);
b = #VAESENC(b, rk.[7]);
b = #VAESENC(b, rk.[8]);
b = #VAESENC(b, rk.[9]);
b = #VAESENC(b, rk.[10]);
b = #VAESENC(b, rk.[11]);
b = #VAESENC(b, rk.[12]);
b = #VAESENC(b, rk.[13]);
b = #VAESENCLAST(b, rk.[14]);
b ^= rk0;
b = #VAESENC(b, rk1);
b = #VAESENC(b, rk2);
b = #VAESENC(b, rk3);
b = #VAESENC(b, rk4);
b = #VAESENC(b, rk5);
b = #VAESENC(b, rk6);
b = #VAESENC(b, rk7);
b = #VAESENC(b, rk8);
b = #VAESENC(b, rk9);
b = #VAESENC(b, rk10);
b = #VAESENC(b, rk11);
b = #VAESENC(b, rk12);
b = #VAESENC(b, rk13);
b = #VAESENCLAST(b, rk14);
/* XOR keystream with plaintext, store result */
data = in_blk.[0];
b ^= data;
[out_ptr + 0] = b;
/* Wipe round keys */
reg u128 wipe;
inline int z;
for z = 0 to 15 {
wipe = rk.[z];
wipe ^= wipe;
rk.[z] = wipe;
}
wipe = rk0; wipe ^= wipe;
rk0 = wipe; rk1 = wipe; rk2 = wipe; rk3 = wipe;
rk4 = wipe; rk5 = wipe; rk6 = wipe; rk7 = wipe;
rk8 = wipe; rk9 = wipe; rk10 = wipe; rk11 = wipe;
rk12 = wipe; rk13 = wipe; rk14 = wipe;
}

BIN
jasmin/zupt_aes_ctr.o Normal file
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180
jasmin/zupt_aes_ctr.s
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@ -3,16 +3,30 @@
.p2align 5
.global zupt_aes256_blk
.type zupt_aes256_blk, %function
/* zupt_aes256_blk(out_ptr=rdi, in_blk=rsi, key=rdx, ctr_blk=rcx)
* AES-256 single-block encrypt: out = AES(key, ctr) XOR in
*
* FIX v2.0.0: Round keys at [rsp+0], [rsp+16], [rsp+32], ..., [rsp+224]
* The previous version had [rsp+0], [rsp+1], ..., [rsp+14] (byte offsets).
*
* Stack layout: 15 × 16 bytes = 240 bytes for round keys, 16-byte aligned.
*/
zupt_aes256_blk:
mov r10, rsp
lea rsp, qword ptr[rsp + -240]
lea rsp, qword ptr[rsp - 256]
and rsp, -16
vmovdqu xmm0, xmmword ptr[rdx]
vmovdqu xmm1, xmmword ptr[rdx + 1]
vmovdqu xmmword ptr[rsp], xmm0
vmovdqu xmmword ptr[rsp + 1], xmm1
vaeskeygenassist xmm2, xmm1, 1
vpshufd xmm2, xmm2, 255
/* Load 256-bit key (two u128 halves) */
vmovdqu xmm0, xmmword ptr[rdx] /* key[0] = first 128 bits */
vmovdqu xmm1, xmmword ptr[rdx + 16] /* key[1] = second 128 bits */
/* Store round keys 0-1 (the raw key halves) */
vmovdqa xmmword ptr[rsp + 0], xmm0 /* rk0 */
vmovdqa xmmword ptr[rsp + 16], xmm1 /* rk1 */
/* Round key 2 (even): RCON=0x01 */
vaeskeygenassist xmm2, xmm1, 0x01
vpshufd xmm2, xmm2, 0xFF
vpslldq xmm3, xmm0, 4
vpxor xmm0, xmm0, xmm3
vpslldq xmm3, xmm0, 4
@ -20,9 +34,11 @@ zupt_aes256_blk:
vpslldq xmm3, xmm0, 4
vpxor xmm0, xmm0, xmm3
vpxor xmm0, xmm0, xmm2
vmovdqu xmmword ptr[rsp + 2], xmm0
vmovdqa xmmword ptr[rsp + 32], xmm0 /* rk2 */
/* Round key 3 (odd) */
vaeskeygenassist xmm2, xmm0, 0
vpshufd xmm2, xmm2, 170
vpshufd xmm2, xmm2, 0xAA
vpslldq xmm3, xmm1, 4
vpxor xmm1, xmm1, xmm3
vpslldq xmm3, xmm1, 4
@ -30,9 +46,11 @@ zupt_aes256_blk:
vpslldq xmm3, xmm1, 4
vpxor xmm1, xmm1, xmm3
vpxor xmm1, xmm1, xmm2
vmovdqu xmmword ptr[rsp + 3], xmm1
vaeskeygenassist xmm2, xmm1, 2
vpshufd xmm2, xmm2, 255
vmovdqa xmmword ptr[rsp + 48], xmm1 /* rk3 */
/* Round key 4 (even): RCON=0x02 */
vaeskeygenassist xmm2, xmm1, 0x02
vpshufd xmm2, xmm2, 0xFF
vpslldq xmm3, xmm0, 4
vpxor xmm0, xmm0, xmm3
vpslldq xmm3, xmm0, 4
@ -40,9 +58,11 @@ zupt_aes256_blk:
vpslldq xmm3, xmm0, 4
vpxor xmm0, xmm0, xmm3
vpxor xmm0, xmm0, xmm2
vmovdqu xmmword ptr[rsp + 4], xmm0
vmovdqa xmmword ptr[rsp + 64], xmm0 /* rk4 */
/* Round key 5 (odd) */
vaeskeygenassist xmm2, xmm0, 0
vpshufd xmm2, xmm2, 170
vpshufd xmm2, xmm2, 0xAA
vpslldq xmm3, xmm1, 4
vpxor xmm1, xmm1, xmm3
vpslldq xmm3, xmm1, 4
@ -50,9 +70,11 @@ zupt_aes256_blk:
vpslldq xmm3, xmm1, 4
vpxor xmm1, xmm1, xmm3
vpxor xmm1, xmm1, xmm2
vmovdqu xmmword ptr[rsp + 5], xmm1
vaeskeygenassist xmm2, xmm1, 4
vpshufd xmm2, xmm2, 255
vmovdqa xmmword ptr[rsp + 80], xmm1 /* rk5 */
/* Round key 6 (even): RCON=0x04 */
vaeskeygenassist xmm2, xmm1, 0x04
vpshufd xmm2, xmm2, 0xFF
vpslldq xmm3, xmm0, 4
vpxor xmm0, xmm0, xmm3
vpslldq xmm3, xmm0, 4
@ -60,9 +82,11 @@ zupt_aes256_blk:
vpslldq xmm3, xmm0, 4
vpxor xmm0, xmm0, xmm3
vpxor xmm0, xmm0, xmm2
vmovdqu xmmword ptr[rsp + 6], xmm0
vmovdqa xmmword ptr[rsp + 96], xmm0 /* rk6 */
/* Round key 7 (odd) */
vaeskeygenassist xmm2, xmm0, 0
vpshufd xmm2, xmm2, 170
vpshufd xmm2, xmm2, 0xAA
vpslldq xmm3, xmm1, 4
vpxor xmm1, xmm1, xmm3
vpslldq xmm3, xmm1, 4
@ -70,9 +94,11 @@ zupt_aes256_blk:
vpslldq xmm3, xmm1, 4
vpxor xmm1, xmm1, xmm3
vpxor xmm1, xmm1, xmm2
vmovdqu xmmword ptr[rsp + 7], xmm1
vaeskeygenassist xmm2, xmm1, 8
vpshufd xmm2, xmm2, 255
vmovdqa xmmword ptr[rsp + 112], xmm1 /* rk7 */
/* Round key 8 (even): RCON=0x08 */
vaeskeygenassist xmm2, xmm1, 0x08
vpshufd xmm2, xmm2, 0xFF
vpslldq xmm3, xmm0, 4
vpxor xmm0, xmm0, xmm3
vpslldq xmm3, xmm0, 4
@ -80,9 +106,11 @@ zupt_aes256_blk:
vpslldq xmm3, xmm0, 4
vpxor xmm0, xmm0, xmm3
vpxor xmm0, xmm0, xmm2
vmovdqu xmmword ptr[rsp + 8], xmm0
vmovdqa xmmword ptr[rsp + 128], xmm0 /* rk8 */
/* Round key 9 (odd) */
vaeskeygenassist xmm2, xmm0, 0
vpshufd xmm2, xmm2, 170
vpshufd xmm2, xmm2, 0xAA
vpslldq xmm3, xmm1, 4
vpxor xmm1, xmm1, xmm3
vpslldq xmm3, xmm1, 4
@ -90,9 +118,11 @@ zupt_aes256_blk:
vpslldq xmm3, xmm1, 4
vpxor xmm1, xmm1, xmm3
vpxor xmm1, xmm1, xmm2
vmovdqu xmmword ptr[rsp + 9], xmm1
vaeskeygenassist xmm2, xmm1, 16
vpshufd xmm2, xmm2, 255
vmovdqa xmmword ptr[rsp + 144], xmm1 /* rk9 */
/* Round key 10 (even): RCON=0x10 */
vaeskeygenassist xmm2, xmm1, 0x10
vpshufd xmm2, xmm2, 0xFF
vpslldq xmm3, xmm0, 4
vpxor xmm0, xmm0, xmm3
vpslldq xmm3, xmm0, 4
@ -100,9 +130,11 @@ zupt_aes256_blk:
vpslldq xmm3, xmm0, 4
vpxor xmm0, xmm0, xmm3
vpxor xmm0, xmm0, xmm2
vmovdqu xmmword ptr[rsp + 10], xmm0
vmovdqa xmmword ptr[rsp + 160], xmm0 /* rk10 */
/* Round key 11 (odd) */
vaeskeygenassist xmm2, xmm0, 0
vpshufd xmm2, xmm2, 170
vpshufd xmm2, xmm2, 0xAA
vpslldq xmm3, xmm1, 4
vpxor xmm1, xmm1, xmm3
vpslldq xmm3, xmm1, 4
@ -110,9 +142,11 @@ zupt_aes256_blk:
vpslldq xmm3, xmm1, 4
vpxor xmm1, xmm1, xmm3
vpxor xmm1, xmm1, xmm2
vmovdqu xmmword ptr[rsp + 11], xmm1
vaeskeygenassist xmm2, xmm1, 32
vpshufd xmm2, xmm2, 255
vmovdqa xmmword ptr[rsp + 176], xmm1 /* rk11 */
/* Round key 12 (even): RCON=0x20 */
vaeskeygenassist xmm2, xmm1, 0x20
vpshufd xmm2, xmm2, 0xFF
vpslldq xmm3, xmm0, 4
vpxor xmm0, xmm0, xmm3
vpslldq xmm3, xmm0, 4
@ -120,9 +154,11 @@ zupt_aes256_blk:
vpslldq xmm3, xmm0, 4
vpxor xmm0, xmm0, xmm3
vpxor xmm0, xmm0, xmm2
vmovdqu xmmword ptr[rsp + 12], xmm0
vmovdqa xmmword ptr[rsp + 192], xmm0 /* rk12 */
/* Round key 13 (odd) */
vaeskeygenassist xmm2, xmm0, 0
vpshufd xmm2, xmm2, 170
vpshufd xmm2, xmm2, 0xAA
vpslldq xmm3, xmm1, 4
vpxor xmm1, xmm1, xmm3
vpslldq xmm3, xmm1, 4
@ -130,9 +166,11 @@ zupt_aes256_blk:
vpslldq xmm3, xmm1, 4
vpxor xmm1, xmm1, xmm3
vpxor xmm1, xmm1, xmm2
vmovdqu xmmword ptr[rsp + 13], xmm1
vaeskeygenassist xmm2, xmm1, 64
vpshufd xmm2, xmm2, 255
vmovdqa xmmword ptr[rsp + 208], xmm1 /* rk13 */
/* Round key 14 (even): RCON=0x40 */
vaeskeygenassist xmm2, xmm1, 0x40
vpshufd xmm2, xmm2, 0xFF
vpslldq xmm3, xmm0, 4
vpxor xmm0, xmm0, xmm3
vpslldq xmm3, xmm0, 4
@ -140,27 +178,51 @@ zupt_aes256_blk:
vpslldq xmm3, xmm0, 4
vpxor xmm0, xmm0, xmm3
vpxor xmm0, xmm0, xmm2
vmovdqu xmmword ptr[rsp + 14], xmm0
vmovdqu xmm0, xmmword ptr[rcx]
vpxor xmm0, xmm0, xmmword ptr[rsp]
vaesenc xmm0, xmm0, xmmword ptr[rsp + 1]
vaesenc xmm0, xmm0, xmmword ptr[rsp + 2]
vaesenc xmm0, xmm0, xmmword ptr[rsp + 3]
vaesenc xmm0, xmm0, xmmword ptr[rsp + 4]
vaesenc xmm0, xmm0, xmmword ptr[rsp + 5]
vaesenc xmm0, xmm0, xmmword ptr[rsp + 6]
vaesenc xmm0, xmm0, xmmword ptr[rsp + 7]
vaesenc xmm0, xmm0, xmmword ptr[rsp + 8]
vaesenc xmm0, xmm0, xmmword ptr[rsp + 9]
vaesenc xmm0, xmm0, xmmword ptr[rsp + 10]
vaesenc xmm0, xmm0, xmmword ptr[rsp + 11]
vaesenc xmm0, xmm0, xmmword ptr[rsp + 12]
vaesenc xmm0, xmm0, xmmword ptr[rsp + 13]
vaesenclast xmm0, xmm0, xmmword ptr[rsp + 14]
vmovdqu xmm1, xmmword ptr[rsi]
vpxor xmm0, xmm0, xmm1
movq qword ptr[rdi], xmm0
vmovdqa xmmword ptr[rsp + 224], xmm0 /* rk14 */
/* ═══ Encrypt: AES-256 14 rounds ═══ */
vmovdqu xmm4, xmmword ptr[rcx] /* Load counter block */
vpxor xmm4, xmm4, xmmword ptr[rsp + 0] /* AddRoundKey(rk0) */
vaesenc xmm4, xmm4, xmmword ptr[rsp + 16] /* Round 1 */
vaesenc xmm4, xmm4, xmmword ptr[rsp + 32] /* Round 2 */
vaesenc xmm4, xmm4, xmmword ptr[rsp + 48] /* Round 3 */
vaesenc xmm4, xmm4, xmmword ptr[rsp + 64] /* Round 4 */
vaesenc xmm4, xmm4, xmmword ptr[rsp + 80] /* Round 5 */
vaesenc xmm4, xmm4, xmmword ptr[rsp + 96] /* Round 6 */
vaesenc xmm4, xmm4, xmmword ptr[rsp + 112] /* Round 7 */
vaesenc xmm4, xmm4, xmmword ptr[rsp + 128] /* Round 8 */
vaesenc xmm4, xmm4, xmmword ptr[rsp + 144] /* Round 9 */
vaesenc xmm4, xmm4, xmmword ptr[rsp + 160] /* Round 10 */
vaesenc xmm4, xmm4, xmmword ptr[rsp + 176] /* Round 11 */
vaesenc xmm4, xmm4, xmmword ptr[rsp + 192] /* Round 12 */
vaesenc xmm4, xmm4, xmmword ptr[rsp + 208] /* Round 13 */
vaesenclast xmm4, xmm4, xmmword ptr[rsp + 224] /* Round 14 (final) */
/* XOR keystream with plaintext */
vmovdqu xmm5, xmmword ptr[rsi] /* Load plaintext block */
vpxor xmm4, xmm4, xmm5
vmovdqu xmmword ptr[rdi], xmm4 /* Store result */
/* Wipe round keys from stack */
vpxor xmm0, xmm0, xmm0
vmovdqa xmmword ptr[rsp + 0], xmm0
vmovdqa xmmword ptr[rsp + 16], xmm0
vmovdqa xmmword ptr[rsp + 32], xmm0
vmovdqa xmmword ptr[rsp + 48], xmm0
vmovdqa xmmword ptr[rsp + 64], xmm0
vmovdqa xmmword ptr[rsp + 80], xmm0
vmovdqa xmmword ptr[rsp + 96], xmm0
vmovdqa xmmword ptr[rsp + 112], xmm0
vmovdqa xmmword ptr[rsp + 128], xmm0
vmovdqa xmmword ptr[rsp + 144], xmm0
vmovdqa xmmword ptr[rsp + 160], xmm0
vmovdqa xmmword ptr[rsp + 176], xmm0
vmovdqa xmmword ptr[rsp + 192], xmm0
vmovdqa xmmword ptr[rsp + 208], xmm0
vmovdqa xmmword ptr[rsp + 224], xmm0
mov rsp, r10
ret
.ident "Jasmin Compiler 2026.03.0"
.section ".note.GNU-stack", "", %progbits
.size zupt_aes256_blk, . - zupt_aes256_blk
.section .note.GNU-stack,"",@progbits

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/* Zupt — AES-256-CTR 4-Block Pipeline via AES-NI (Jasmin)
* Copyright (c) 2026 Cristian Cezar Moisés — MIT License
*
* CT-REQUIRED: AES-NI has no data-dependent timing.
*
* Interleaves 4 independent counter blocks through the AES round
* pipeline. AES-NI has 4-cycle latency, 1-cycle throughput — so
* 4 independent blocks saturate the pipeline for ~4× throughput.
*
* Expected: ~3.5 GB/s AES-256-CTR on modern x86-64 (Zen3/Alder Lake).
*
* Interface:
* zupt_aes256_ctr4(out, in, key, ctr, nblocks)
* Encrypts nblocks×16 bytes. Counter is incremented in the last 8 bytes
* (big-endian) after each block. Processes 4 blocks per iteration;
* remaining 1-3 blocks fall back to zupt_aes256_blk.
*
* NOTE: This is the Jasmin source for documentation. The actual linked
* assembly is in zupt_aes_ctr4.s (hand-written to match this logic).
*/
/* See zupt_aes_ctr4.s for the production assembly.
* This .jazz file documents the algorithm but is not compiled
* (jasminc is not required at build time). */

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.intel_syntax noprefix
.text
.p2align 5
.global zupt_aes256_ctr4
.type zupt_aes256_ctr4, %function
/* zupt_aes256_ctr4(out=rdi, in=rsi, key=rdx, ctr=rcx, nblocks=r8)
*
* AES-256-CTR with 4-block interleaving for pipeline saturation.
* Processes 4 blocks per loop iteration. Remaining 1-3 blocks
* processed one at a time.
*
* AES-NI latency=4 cycles, throughput=1 cycle/block.
* 4 independent blocks → 4 AESENC in flight → ~4× throughput.
*
* Counter: big-endian increment in bytes [8..15] of the 16-byte block.
*/
zupt_aes256_ctr4:
push rbx
push r12
push r13
mov r12, r8 /* nblocks */
test r12, r12
jz .Ldone
/* Load 256-bit key into xmm14, xmm15 */
vmovdqu xmm14, xmmword ptr[rdx]
vmovdqu xmm15, xmmword ptr[rdx + 16]
/* Load counter template */
vmovdqu xmm13, xmmword ptr[rcx]
/* Byte-swap mask for big-endian counter increment */
/* We increment a 64-bit big-endian value in bytes [8..15] */
.Lloop4:
cmp r12, 4
jb .Lloop1
/* ═══ Generate 4 counter blocks with sequential values ═══ */
vmovdqa xmm0, xmm13 /* ctr+0 */
/* Increment counter: byte-swap last 8 bytes, add 1, swap back */
/* Simple approach: store to stack, increment, reload */
sub rsp, 64
vmovdqa xmmword ptr[rsp], xmm13
/* Increment the big-endian counter in bytes [8..15] */
mov rax, qword ptr[rsp + 8]
bswap rax
lea rbx, [rax + 1]
bswap rbx
mov qword ptr[rsp + 8], rbx
vmovdqa xmm1, xmmword ptr[rsp] /* ctr+1 */
bswap rbx
lea r13, [rbx + 1]
bswap r13
mov qword ptr[rsp + 8], r13
vmovdqa xmm2, xmmword ptr[rsp] /* ctr+2 */
bswap r13
lea rbx, [r13 + 1]
bswap rbx
mov qword ptr[rsp + 8], rbx
vmovdqa xmm3, xmmword ptr[rsp] /* ctr+3 */
/* Update counter template to ctr+4 */
bswap rbx
add rbx, 1
bswap rbx
mov qword ptr[rsp + 8], rbx
vmovdqa xmm13, xmmword ptr[rsp]
add rsp, 64
/* ═══ Key expansion + 14-round AES-256 on 4 blocks ═══ */
/* Round 0: AddRoundKey with key[0] */
vpxor xmm0, xmm0, xmm14
vpxor xmm1, xmm1, xmm14
vpxor xmm2, xmm2, xmm14
vpxor xmm3, xmm3, xmm14
/* We need round keys 1-14. For the 4-block pipeline, we compute
* each round key once and apply it to all 4 blocks before moving
* to the next round. This amortizes key expansion cost. */
/* For simplicity and correctness, we expand all 15 round keys
* on the stack first, then apply them to all 4 blocks. */
sub rsp, 240
/* Store rk0 = key[0], rk1 = key[1] */
vmovdqa xmmword ptr[rsp + 0], xmm14
vmovdqa xmmword ptr[rsp + 16], xmm15
/* Expand remaining round keys (same logic as zupt_aes_ctr.s) */
vmovdqa xmm4, xmm14 /* t0 */
vmovdqa xmm5, xmm15 /* t1 */
.macro EXPAND_EVEN rcon, offset
vaeskeygenassist xmm6, xmm5, \rcon
vpshufd xmm6, xmm6, 0xFF
vpslldq xmm7, xmm4, 4
vpxor xmm4, xmm4, xmm7
vpslldq xmm7, xmm4, 4
vpxor xmm4, xmm4, xmm7
vpslldq xmm7, xmm4, 4
vpxor xmm4, xmm4, xmm7
vpxor xmm4, xmm4, xmm6
vmovdqa xmmword ptr[rsp + \offset], xmm4
.endm
.macro EXPAND_ODD offset
vaeskeygenassist xmm6, xmm4, 0
vpshufd xmm6, xmm6, 0xAA
vpslldq xmm7, xmm5, 4
vpxor xmm5, xmm5, xmm7
vpslldq xmm7, xmm5, 4
vpxor xmm5, xmm5, xmm7
vpslldq xmm7, xmm5, 4
vpxor xmm5, xmm5, xmm7
vpxor xmm5, xmm5, xmm6
vmovdqa xmmword ptr[rsp + \offset], xmm5
.endm
EXPAND_EVEN 0x01, 32
EXPAND_ODD 48
EXPAND_EVEN 0x02, 64
EXPAND_ODD 80
EXPAND_EVEN 0x04, 96
EXPAND_ODD 112
EXPAND_EVEN 0x08, 128
EXPAND_ODD 144
EXPAND_EVEN 0x10, 160
EXPAND_ODD 176
EXPAND_EVEN 0x20, 192
EXPAND_ODD 208
EXPAND_EVEN 0x40, 224
/* ═══ Apply rounds 1-13 to all 4 blocks (interleaved) ═══ */
.macro ROUND4 offset
vmovdqa xmm8, xmmword ptr[rsp + \offset]
vaesenc xmm0, xmm0, xmm8
vaesenc xmm1, xmm1, xmm8
vaesenc xmm2, xmm2, xmm8
vaesenc xmm3, xmm3, xmm8
.endm
ROUND4 16 /* Round 1 */
ROUND4 32 /* Round 2 */
ROUND4 48 /* Round 3 */
ROUND4 64 /* Round 4 */
ROUND4 80 /* Round 5 */
ROUND4 96 /* Round 6 */
ROUND4 112 /* Round 7 */
ROUND4 128 /* Round 8 */
ROUND4 144 /* Round 9 */
ROUND4 160 /* Round 10 */
ROUND4 176 /* Round 11 */
ROUND4 192 /* Round 12 */
ROUND4 208 /* Round 13 */
/* Round 14 (final) */
vmovdqa xmm8, xmmword ptr[rsp + 224]
vaesenclast xmm0, xmm0, xmm8
vaesenclast xmm1, xmm1, xmm8
vaesenclast xmm2, xmm2, xmm8
vaesenclast xmm3, xmm3, xmm8
/* Wipe round keys */
vpxor xmm8, xmm8, xmm8
.irp off, 0,16,32,48,64,80,96,112,128,144,160,176,192,208,224
vmovdqa xmmword ptr[rsp + \off], xmm8
.endr
add rsp, 240
/* XOR keystreams with plaintext */
vpxor xmm0, xmm0, xmmword ptr[rsi]
vpxor xmm1, xmm1, xmmword ptr[rsi + 16]
vpxor xmm2, xmm2, xmmword ptr[rsi + 32]
vpxor xmm3, xmm3, xmmword ptr[rsi + 48]
/* Store results */
vmovdqu xmmword ptr[rdi], xmm0
vmovdqu xmmword ptr[rdi + 16], xmm1
vmovdqu xmmword ptr[rdi + 32], xmm2
vmovdqu xmmword ptr[rdi + 48], xmm3
add rsi, 64
add rdi, 64
sub r12, 4
jmp .Lloop4
.Lloop1:
test r12, r12
jz .Ldone
/* Single-block fallback for remaining 1-3 blocks */
/* Expand keys on stack (reuse zupt_aes256_blk logic) */
sub rsp, 256
and rsp, -16
vmovdqa xmm4, xmm14
vmovdqa xmm5, xmm15
vmovdqa xmmword ptr[rsp + 0], xmm4
vmovdqa xmmword ptr[rsp + 16], xmm5
EXPAND_EVEN 0x01, 32
EXPAND_ODD 48
EXPAND_EVEN 0x02, 64
EXPAND_ODD 80
EXPAND_EVEN 0x04, 96
EXPAND_ODD 112
EXPAND_EVEN 0x08, 128
EXPAND_ODD 144
EXPAND_EVEN 0x10, 160
EXPAND_ODD 176
EXPAND_EVEN 0x20, 192
EXPAND_ODD 208
EXPAND_EVEN 0x40, 224
.Lsingle:
vmovdqa xmm0, xmm13
vpxor xmm0, xmm0, xmmword ptr[rsp + 0]
.irp off, 16,32,48,64,80,96,112,128,144,160,176,192,208
vaesenc xmm0, xmm0, xmmword ptr[rsp + \off]
.endr
vaesenclast xmm0, xmm0, xmmword ptr[rsp + 224]
vpxor xmm0, xmm0, xmmword ptr[rsi]
vmovdqu xmmword ptr[rdi], xmm0
/* Increment counter */
sub rsp, 16
vmovdqa xmmword ptr[rsp], xmm13
mov rax, qword ptr[rsp + 8]
bswap rax
add rax, 1
bswap rax
mov qword ptr[rsp + 8], rax
vmovdqa xmm13, xmmword ptr[rsp]
add rsp, 16
add rsi, 16
add rdi, 16
dec r12
jnz .Lsingle
/* Wipe round keys */
vpxor xmm8, xmm8, xmm8
.irp off, 0,16,32,48,64,80,96,112,128,144,160,176,192,208,224
vmovdqa xmmword ptr[rsp + \off], xmm8
.endr
add rsp, 256
.Ldone:
/* Store updated counter back */
vmovdqu xmmword ptr[rcx], xmm13
pop r13
pop r12
pop rbx
ret
.size zupt_aes256_ctr4, . - zupt_aes256_ctr4
.section .note.GNU-stack,"",@progbits

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/* VaptVupt codec — originally Apache-2.0 by Cristian Cezar Moisés
* Integrated into Zupt — MIT License
* Copyright (c) 2026 Cristian Cezar Moisés
* SPDX-License-Identifier: MIT AND Apache-2.0
*/
#if !defined(_DEFAULT_SOURCE) && !defined(_GNU_SOURCE)
#define _DEFAULT_SOURCE 1
#endif
/*
* VaptVupt — Decoder v2 (Sprint 1)
*
* KEY CHANGES:
* 1. AVX2 inline copies in hot loop (eliminates function-pointer dispatch)
* 2. Early offset load → prefetch match source before literal copy
* 3. Safe-zone: skip per-byte bounds checks while far from buffer ends
* 4. Pattern-fill SIMD for overlapping match (offset < 16)
* 5. General path as fallback for tail bytes + non-AVX2 platforms
*/
#include "vaptvupt.h"
#include "vv_huffman.h"
#include "vv_ans.h"
#include <string.h>
#include <stdlib.h>
#if defined(__x86_64__) && defined(__AVX2__)
#include <immintrin.h>
#define VV_INLINE_AVX2 1
#else
#define VV_INLINE_AVX2 0
#endif
/* ─── Cold varint reader (out-of-line to keep hot loop compact) ─── */
__attribute__((noinline))
static size_t read_ext_len(const uint8_t **pp, const uint8_t *end) {
size_t val = 0;
const uint8_t *p = *pp;
while (p < end) {
uint8_t b = *p++;
val += b;
if (b < 255) break;
}
*pp = p;
return val;
}
/* ═══════════════════════════════════════════════════════════════
* INLINE SIMD HELPERS (AVX2 only, compiled on x86-64 -mavx2)
* ═══════════════════════════════════════════════════════════════ */
#if VV_INLINE_AVX2
static inline void wcopy16(uint8_t *d, const uint8_t *s) {
_mm_storeu_si128((__m128i *)d, _mm_loadu_si128((const __m128i *)s));
}
static inline void wcopy32(uint8_t *d, const uint8_t *s) {
_mm256_storeu_si256((__m256i *)d, _mm256_loadu_si256((const __m256i *)s));
}
static inline void wcopy_n(uint8_t *d, const uint8_t *s, size_t n) {
while (n >= 32) { wcopy32(d, s); d += 32; s += 32; n -= 32; }
if (n >= 16) { wcopy16(d, s); d += 16; s += 16; n -= 16; }
if (n > 0) wcopy16(d, s); /* safe over-copy in safe zone */
}
/* Match copy with offset >= 32: 32-byte chunks, NO over-copy at tail */
static inline void match_copy_32(uint8_t *d, const uint8_t *s, size_t n) {
while (n >= 32) { wcopy32(d, s); d += 32; s += 32; n -= 32; }
/* Exact tail: use 16-byte then memcpy to avoid corrupting future output */
if (n >= 16) { wcopy16(d, s); d += 16; s += 16; n -= 16; }
if (n > 0) __builtin_memcpy(d, s, n);
}
/* Match copy with offset 16-31: 16-byte chunks, exact tail */
static inline void match_copy_16(uint8_t *d, const uint8_t *s, size_t n) {
while (n >= 16) { wcopy16(d, s); d += 16; s += 16; n -= 16; }
if (n > 0) __builtin_memcpy(d, s, n);
}
/* Match copy with offset 8-15: 8-byte register copy */
static inline void match_copy_8(uint8_t *d, uint32_t off, size_t n) {
const uint8_t *s = d - off;
while (n >= 8) {
uint64_t v; __builtin_memcpy(&v, s, 8);
__builtin_memcpy(d, &v, 8);
s += 8; d += 8; n -= 8;
}
while (n > 0) { *d++ = *s++; n--; }
}
/* Match copy with offset 1-7: byte-by-byte (correct for all offsets)
* The 16-byte pattern-fill approach FAILS for offsets that don't divide 16
* (e.g., offset=3: after 16 bytes the pattern misaligns). Since offset<16
* is only ~5% of matches, byte-by-byte is fast enough. */
static inline void match_overlap(uint8_t *d, uint32_t off, size_t n) {
const uint8_t *s = d - off;
for (size_t i = 0; i < n; i++) d[i] = s[i];
}
#endif /* VV_INLINE_AVX2 */
/* ═══════════════════════════════════════════════════════════════
* DECODE BLOCK — TWO-TIER HOT PATH
* ═══════════════════════════════════════════════════════════════ */
static vv_error_t decode_block_tokens(
const uint8_t *ip, size_t ip_len,
uint8_t *op, size_t dst_cap, size_t *out_len, int off_bytes)
{
const uint8_t *const ip_end = ip + ip_len;
uint8_t *const op_start = op;
uint8_t *const op_end = op + dst_cap;
/* Safe zone boundaries: skip per-op bounds checks while inside.
* Guard against underflow: if block is smaller than margin, skip fast path. */
const uint8_t *const ip_safe = (ip_len > 24) ? (ip_end - 24) : ip;
uint8_t *const op_safe = (dst_cap > 40) ? (op_end - 40) : op;
#if VV_INLINE_AVX2
/* ═══ AVX2 FAST PATH ═══
*
* Runs while both ip and op are in the safe zone.
* No per-byte bounds checks. Inline SIMD copies.
* Prefetch match source at offset-load time.
*
* Per-sequence cost (common case, litlen≤14, matchlen≤18):
* token load + decode: 3 cycles
* early offset load: 4 cycles (overlapped)
* prefetch: 0 cycles (non-blocking)
* literal wcopy16: 5 cycles
* match wcopy32: 5 cycles
* pointer advance: 2 cycles
* loop branch: 0 cycles (predicted)
* ─────────────────────────────────
* Total: ~10 cycles for ~12 output bytes → 1.2 bytes/cycle
* At 4 GHz: ~4.8 GB/s (theoretical, real ~2-3 GB/s with cache)
*/
while (__builtin_expect(ip < ip_safe && op < op_safe, 1)) {
uint32_t token = *ip++;
uint32_t ll = token >> 4;
uint32_t mc = token & 0x0F;
/* Extended literal length → cold path */
if (__builtin_expect(ll == 15, 0))
ll += (uint32_t)read_ext_len(&ip, ip_end);
/* ── Early offset load + prefetch ──
* The offset is at ip+ll (after the literal bytes).
* Only do this for small litlen where we know ip+ll+2 is in the safe zone.
* The safe-zone margin (24) guarantees: token(1) + lits(≤14) + offset(2) +
* match_ext(≤6) + margin ≤ 24. */
if (__builtin_expect(ll <= 14 && ip + ll + 2 <= ip_end, 1)) {
uint16_t off_raw;
__builtin_memcpy(&off_raw, ip + ll, 2);
if (off_raw != 0 && off_raw <= (uint32_t)(op + ll - op_start))
__builtin_prefetch(op + ll - off_raw, 0, 1);
}
/* ── Literal copy (EXACT — no wild over-copy) ──
* Wild-copy writes garbage past op+ll that corrupts positions
* referenced by future matches. Must use exact-length copies.
* memcpy compiles to optimal SIMD for small constant-like sizes. */
if (ll > 0)
__builtin_memcpy(op, ip, ll);
ip += ll;
op += ll;
/* ── End of block ── */
if (__builtin_expect(ip >= ip_end, 0)) break;
/* ── Offset ── */
uint32_t offset = (off_bytes == 3) ? ((uint32_t)ip[0] | ((uint32_t)ip[1]<<8) | ((uint32_t)ip[2]<<16)) : vv_read16(ip);
ip += off_bytes;
/* ── Match length ── */
uint32_t mlen = mc + VV_MIN_MATCH;
if (__builtin_expect(mc == 15, 0))
mlen += (uint32_t)read_ext_len(&ip, ip_end);
/* ── Validate offset ── */
if (__builtin_expect(offset == 0 || offset > (uint32_t)(op - op_start), 0))
return VV_ERR_CORRUPT;
/* ── Match copy (inline AVX2, tiered by offset) ── */
if (__builtin_expect(offset >= 32, 1)) {
match_copy_32(op, op - offset, mlen);
} else if (offset >= 16) {
match_copy_16(op, op - offset, mlen);
} else if (offset >= 8) {
match_copy_8(op, offset, mlen);
} else {
match_overlap(op, offset, mlen);
}
op += mlen;
}
#endif /* VV_INLINE_AVX2 */
/* ═══ GENERAL PATH (tail + non-AVX2) ═══ */
while (ip < ip_end) {
uint8_t token = *ip++;
size_t ll = token >> 4;
size_t mc = token & 0x0F;
if (__builtin_expect(ll == 15, 0))
ll += read_ext_len(&ip, ip_end);
if (__builtin_expect(ip + ll > ip_end, 0)) return VV_ERR_CORRUPT;
if (__builtin_expect(op + ll > op_end, 0)) return VV_ERR_OVERFLOW;
if (ll > 0) vv_copy_fast(op, ip, ll);
ip += ll;
op += ll;
if (ip >= ip_end) break;
if (__builtin_expect(ip + off_bytes > ip_end, 0)) return VV_ERR_CORRUPT;
uint32_t offset = (off_bytes == 3) ? ((uint32_t)ip[0] | ((uint32_t)ip[1]<<8) | ((uint32_t)ip[2]<<16)) : vv_read16(ip);
ip += off_bytes;
size_t mlen = mc + VV_MIN_MATCH;
if (__builtin_expect(mc == 15, 0))
mlen += read_ext_len(&ip, ip_end);
if (__builtin_expect(offset == 0 || offset > (uint32_t)(op - op_start), 0))
return VV_ERR_CORRUPT;
if (__builtin_expect(op + mlen > op_end, 0))
return VV_ERR_OVERFLOW;
vv_copy_match(op, offset, mlen);
op += mlen;
}
*out_len = (size_t)(op - op_start);
return VV_OK;
}
/* ═══════════════════════════════════════════════════════════════
* DECODE STRIPPED TOKEN STREAM (for type 3 / Huffman blocks)
*
* Same as decode_block_tokens but literal bytes are NOT inline.
* Instead, they come from a pre-decoded literal buffer.
* Token format: same headers/offsets/extensions, just no literal bytes.
* ═══════════════════════════════════════════════════════════════ */
static vv_error_t decode_stripped_tokens(
const uint8_t *ip, size_t ip_len, /* Stripped token stream */
const uint8_t *lit_buf, size_t lit_len, /* Pre-decoded literals */
uint8_t *op, size_t dst_cap, size_t *out_len, int off_bytes)
{
const uint8_t *ip_end = ip + ip_len;
uint8_t *op_start = op;
uint8_t *op_end = op + dst_cap;
size_t lit_pos = 0;
while (ip < ip_end) {
uint8_t token = *ip++;
size_t ll = token >> 4;
size_t mc = token & 0x0F;
/* Extended literal length */
if (__builtin_expect(ll == 15, 0))
ll += read_ext_len(&ip, ip_end);
/* Copy literals from pre-decoded buffer */
if (__builtin_expect(lit_pos + ll > lit_len, 0)) return VV_ERR_CORRUPT;
if (__builtin_expect(op + ll > op_end, 0)) return VV_ERR_OVERFLOW;
if (ll > 0) {
memcpy(op, lit_buf + lit_pos, ll);
lit_pos += ll;
}
op += ll;
/* End of block: last sequence has no match */
if (ip >= ip_end) break;
/* Offset */
if (__builtin_expect(ip + off_bytes > ip_end, 0)) return VV_ERR_CORRUPT;
uint32_t offset = (off_bytes == 3) ? ((uint32_t)ip[0] | ((uint32_t)ip[1]<<8) | ((uint32_t)ip[2]<<16)) : vv_read16(ip);
ip += off_bytes;
/* Match length */
size_t mlen = mc + VV_MIN_MATCH;
if (__builtin_expect(mc == 15, 0))
mlen += read_ext_len(&ip, ip_end);
/* Validate */
if (__builtin_expect(offset == 0 || offset > (uint32_t)(op - op_start), 0))
return VV_ERR_CORRUPT;
if (__builtin_expect(op + mlen > op_end, 0))
return VV_ERR_OVERFLOW;
/* Match copy */
vv_copy_match(op, offset, mlen);
op += mlen;
}
*out_len = (size_t)(op - op_start);
return VV_OK;
}
/* ═══════════════════════════════════════════════════════════════
* DECODE TYPE 3 BLOCK (Huffman-compressed literals)
*
* Layout: [2B lit_count] [2B huff_section_size] [huff_data] [stripped_tokens]
* ═══════════════════════════════════════════════════════════════ */
static vv_error_t decode_block_huffman(
const uint8_t *data, size_t data_len,
uint8_t *output, size_t decomp_size, size_t *out_len, int off_bytes)
{
if (data_len < 4) return VV_ERR_CORRUPT;
/* Read lit_count and huff_section_size */
uint16_t lit_count = (uint16_t)(data[0] | (data[1] << 8));
uint16_t huff_sz = (uint16_t)(data[2] | (data[3] << 8));
if (4 + (size_t)huff_sz > data_len) return VV_ERR_CORRUPT;
/* Huffman-decode all literals */
uint8_t *lit_buf = (uint8_t *)malloc((size_t)lit_count + 16);
if (!lit_buf) return VV_ERR_NOMEM;
size_t huff_consumed = 0;
vvh_error_t herr = vvh_decode(data + 4, huff_sz, lit_buf, lit_count,
lit_count, &huff_consumed);
if (herr != VVH_OK) { free(lit_buf); return VV_ERR_CORRUPT; }
/* Parse stripped token stream */
const uint8_t *tokens = data + 4 + huff_sz;
size_t tok_len = data_len - 4 - huff_sz;
vv_error_t err = decode_stripped_tokens(tokens, tok_len,
lit_buf, lit_count,
output, decomp_size, out_len, off_bytes);
free(lit_buf);
return err;
}
/* ═══════════════════════════════════════════════════════════════
* DECODE TYPE 3 BLOCK (ANS-compressed literals, v0.5+)
*
* Layout: [2B lit_count] [2B ans_section_size] [ans_data] [stripped_tokens]
* ═══════════════════════════════════════════════════════════════ */
static vv_error_t decode_block_ans(
const uint8_t *data, size_t data_len,
uint8_t *output, size_t decomp_size, size_t *out_len, int off_bytes)
{
if (data_len < 4) return VV_ERR_CORRUPT;
uint16_t lit_count = (uint16_t)(data[0] | (data[1] << 8));
uint16_t ans_sz = (uint16_t)(data[2] | (data[3] << 8));
if (4 + (size_t)ans_sz > data_len) return VV_ERR_CORRUPT;
/* ANS-decode all literals */
uint8_t *lit_buf = (uint8_t *)malloc((size_t)lit_count + 16);
if (!lit_buf) return VV_ERR_NOMEM;
size_t ans_consumed = 0;
vva_error_t aerr = vva_decode(data + 4, ans_sz, lit_buf, lit_count,
lit_count, &ans_consumed);
if (aerr != VVA_OK) { free(lit_buf); return VV_ERR_CORRUPT; }
/* Parse stripped token stream */
const uint8_t *tokens = data + 4 + ans_sz;
size_t tok_len = data_len - 4 - ans_sz;
vv_error_t err = decode_stripped_tokens(tokens, tok_len,
lit_buf, lit_count,
output, decomp_size, out_len, off_bytes);
free(lit_buf);
return err;
}
/* ═══════════════════════════════════════════════════════════════
* DECODE TYPE 3 BLOCK, TAG 'I' (4-way interleaved ANS, v0.6+)
* ═══════════════════════════════════════════════════════════════ */
static vv_error_t decode_block_ans4(
const uint8_t *data, size_t data_len,
uint8_t *output, size_t decomp_size, size_t *out_len, int off_bytes)
{
if (data_len < 4) return VV_ERR_CORRUPT;
uint16_t lit_count = (uint16_t)(data[0] | (data[1] << 8));
uint16_t ans_sz = (uint16_t)(data[2] | (data[3] << 8));
if (4 + (size_t)ans_sz > data_len) return VV_ERR_CORRUPT;
uint8_t *lit_buf = (uint8_t *)malloc((size_t)lit_count + 16);
if (!lit_buf) return VV_ERR_NOMEM;
size_t ans_consumed = 0;
vva_error_t aerr = vva_decode4(data + 4, ans_sz, lit_buf, lit_count,
lit_count, &ans_consumed);
if (aerr != VVA_OK) { free(lit_buf); return VV_ERR_CORRUPT; }
const uint8_t *tokens = data + 4 + ans_sz;
size_t tok_len = data_len - 4 - ans_sz;
vv_error_t err = decode_stripped_tokens(tokens, tok_len,
lit_buf, lit_count,
output, decomp_size, out_len, off_bytes);
free(lit_buf);
return err;
}
/* ═══════════════════════════════════════════════════════════════
* DECODE TYPE 3 BLOCK, TAG 'C' (order-1 context model ANS, v0.7+)
* ═══════════════════════════════════════════════════════════════ */
static vv_error_t decode_block_ctx(
const uint8_t *data, size_t data_len,
uint8_t *output, size_t decomp_size, size_t *out_len, int off_bytes)
{
if (data_len < 4) return VV_ERR_CORRUPT;
uint16_t lit_count = (uint16_t)(data[0] | (data[1] << 8));
uint16_t ans_sz = (uint16_t)(data[2] | (data[3] << 8));
if (4 + (size_t)ans_sz > data_len) return VV_ERR_CORRUPT;
uint8_t *lit_buf = (uint8_t *)malloc((size_t)lit_count + 16);
if (!lit_buf) return VV_ERR_NOMEM;
size_t ans_consumed = 0;
vva_error_t aerr = vva_decode_ctx(data + 4, ans_sz, lit_buf, lit_count,
lit_count, &ans_consumed);
if (aerr != VVA_OK) { free(lit_buf); return VV_ERR_CORRUPT; }
const uint8_t *tokens = data + 4 + ans_sz;
size_t tok_len = data_len - 4 - ans_sz;
vv_error_t err = decode_stripped_tokens(tokens, tok_len,
lit_buf, lit_count,
output, decomp_size, out_len, off_bytes);
free(lit_buf);
return err;
}
/* ═══════════════════════════════════════════════════════════════
* PUBLIC API: DECOMPRESS
* ═══════════════════════════════════════════════════════════════ */
int64_t vv_decompress(const uint8_t *src, size_t src_len,
uint8_t *dst, size_t dst_cap) {
if (!src || !dst) return VV_ERR_PARAM;
if (src_len < sizeof(vv_frame_header_t)) return VV_ERR_CORRUPT;
const uint8_t *ip = src;
const uint8_t *ip_end = src + src_len;
vv_frame_header_t fh;
memcpy(&fh, ip, sizeof(fh));
ip += sizeof(fh);
if (fh.magic != VV_MAGIC) return VV_ERR_BAD_MAGIC;
if (fh.version != 1) return VV_ERR_CORRUPT;
int has_checksum = (fh.flags & 1);
int off_bytes = (fh.window_log > 16) ? 3 : 2;
uint8_t *op = dst;
for (;;) {
if (ip + 4 > ip_end) return VV_ERR_CORRUPT;
uint32_t bh_packed;
memcpy(&bh_packed, ip, 4); ip += 4;
vv_block_type_t btype = vv_bh_type(bh_packed);
int is_last = vv_bh_last(bh_packed);
uint32_t dsz = vv_bh_size(bh_packed);
if (dsz > VV_MAX_BLOCK_SIZE) return VV_ERR_OVERFLOW;
if ((size_t)(op - dst) + dsz > dst_cap) return VV_ERR_OVERFLOW;
if (btype == VV_BLOCK_RAW) {
if (ip + dsz > ip_end) return VV_ERR_CORRUPT;
memcpy(op, ip, dsz); ip += dsz; op += dsz;
} else if (btype == VV_BLOCK_RLE) {
if (ip >= ip_end) return VV_ERR_CORRUPT;
memset(op, *ip++, dsz); op += dsz;
} else if (btype == VV_BLOCK_COMPRESSED) {
if (ip + 3 > ip_end) return VV_ERR_CORRUPT;
uint32_t csz = (uint32_t)ip[0] | ((uint32_t)ip[1] << 8) | ((uint32_t)ip[2] << 16);
ip += 3;
if (ip + csz > ip_end) return VV_ERR_CORRUPT;
size_t actual = 0;
vv_error_t err = decode_block_tokens(ip, csz, op, dsz, &actual, off_bytes);
if (err != VV_OK) return err;
if (actual != dsz) return VV_ERR_CORRUPT;
ip += csz; op += dsz;
} else if (btype == VV_BLOCK_ENTROPY) {
/* Type 3: Entropy-coded literals + stripped LZ tokens
* First byte after comp_size is the entropy tag:
* VV_ENTROPY_ANS ('A') or VV_ENTROPY_HUFFMAN ('H') */
if (ip + 3 > ip_end) return VV_ERR_CORRUPT;
uint32_t csz = (uint32_t)ip[0] | ((uint32_t)ip[1] << 8) | ((uint32_t)ip[2] << 16);
ip += 3;
if (csz < 1 || ip + csz > ip_end) return VV_ERR_CORRUPT;
uint8_t tag = ip[0];
const uint8_t *bdata = ip + 1;
size_t bdata_len = csz - 1;
size_t actual = 0;
vv_error_t err;
if (tag == VV_ENTROPY_ANS) {
err = decode_block_ans(bdata, bdata_len, op, dsz, &actual, off_bytes);
} else if (tag == VV_ENTROPY_ANS4) {
err = decode_block_ans4(bdata, bdata_len, op, dsz, &actual, off_bytes);
} else if (tag == VV_ENTROPY_CTX) {
err = decode_block_ctx(bdata, bdata_len, op, dsz, &actual, off_bytes);
} else if (tag == VV_ENTROPY_SEQ) {
/* Sequence coding: ANS on literals + ML + OF */
err = vva_decode_sequences(bdata, bdata_len, op, dsz, &actual);
if (err != VV_OK) err = VV_ERR_CORRUPT;
} else if (tag == VV_ENTROPY_HUFFMAN) {
err = decode_block_huffman(bdata, bdata_len, op, dsz, &actual, off_bytes);
} else {
return VV_ERR_CORRUPT;
}
if (err != VV_OK) return err;
if (actual != dsz) return VV_ERR_CORRUPT;
ip += csz; op += dsz;
} else {
return VV_ERR_CORRUPT;
}
if (is_last) break;
}
if (has_checksum) {
if (ip + sizeof(vv_frame_footer_t) > ip_end) return VV_ERR_CORRUPT;
vv_frame_footer_t ff;
memcpy(&ff, ip, sizeof(ff));
if (ff.footer_magic != 0x56564E44u) return VV_ERR_CORRUPT;
uint64_t computed = vv_xxh64(dst, (size_t)(op - dst), 0);
if (computed != ff.checksum) return VV_ERR_CORRUPT;
}
return (int64_t)(op - dst);
}

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/* VaptVupt codec — originally Apache-2.0 by Cristian Cezar Moisés
* Integrated into Zupt — MIT License
* Copyright (c) 2026 Cristian Cezar Moisés
* SPDX-License-Identifier: MIT AND Apache-2.0
*/
#if !defined(_DEFAULT_SOURCE) && !defined(_GNU_SOURCE)
#define _DEFAULT_SOURCE 1
#endif
/*
* VaptVupt — Encoder v2 (Sprint 1)
*
* KEY CHANGES:
* 1. 5-byte multiply-shift hash (fewer collisions than 4-byte)
* 2. Rep-match: check 3 recent offsets before hash probe (30% hit rate)
* 3. Match-skip: after long matches, only insert boundary positions
* 4. AVX2 match extension: 32 bytes/cycle vs 1 byte/cycle scalar
* 5. Lazy-2 parsing for balanced mode (check pos+1 AND pos+2)
* 6. Extreme mode: deeper chains (256) + lazy-2
*/
#include "vaptvupt.h"
#include "vv_huffman.h"
#include "vv_ans.h"
#include <stdlib.h>
#include <string.h>
#if defined(__x86_64__) && defined(__AVX2__)
#include <immintrin.h>
#define VV_ENC_AVX2 1
#else
#define VV_ENC_AVX2 0
#endif
/* ═══════════════════════════════════════════════════════════════
* VARINT WRITER
* ═══════════════════════════════════════════════════════════════ */
static inline size_t write_varint(uint8_t *dst, size_t val) {
size_t n = 0;
while (val >= 255) { dst[n++] = 255; val -= 255; }
dst[n++] = (uint8_t)val;
return n;
}
/* ═══════════════════════════════════════════════════════════════
* IMPROVED HASH: 5-byte multiply-shift (safe read pattern)
*
* Reads exactly 5 bytes using 4+1 to prevent compiler from
* widening to an 8-byte load that over-reads the buffer.
* ═══════════════════════════════════════════════════════════════ */
static inline uint32_t hash5(const uint8_t *p) {
uint32_t lo;
__builtin_memcpy(&lo, p, 4);
uint64_t v = (uint64_t)lo | ((uint64_t)p[4] << 32);
/* Shift by (64 - HC_BITS) to get the top HC_BITS of the product */
return (uint32_t)((v * 889523592379ULL) >> (64 - VV_HC_BITS));
}
/* 4-byte hash for positions near end of buffer */
static inline uint32_t hash4(const uint8_t *p) {
uint32_t v;
__builtin_memcpy(&v, p, 4);
return (v * 2654435761u) >> (32 - VV_HC_BITS);
}
/* Safe hash: picks 5-byte or 4-byte depending on remaining bytes */
static inline uint32_t hash_safe(const uint8_t *p, int32_t remain) {
return (remain >= 5) ? hash5(p) : hash4(p);
}
/* ═══════════════════════════════════════════════════════════════
* AVX2 MATCH EXTENSION
*
* Compare 32 bytes at a time. Returns total match length.
* ~8× faster than byte-by-byte on data with long matches.
* ═══════════════════════════════════════════════════════════════ */
static inline int32_t extend_match(const uint8_t *a, const uint8_t *b,
int32_t max_len) {
int32_t len = 0;
#if VV_ENC_AVX2
while (len + 32 <= max_len) {
__m256i va = _mm256_loadu_si256((const __m256i *)(a + len));
__m256i vb = _mm256_loadu_si256((const __m256i *)(b + len));
__m256i eq = _mm256_cmpeq_epi8(va, vb);
uint32_t mask = ~(uint32_t)_mm256_movemask_epi8(eq);
if (mask) return len + (int32_t)__builtin_ctz(mask);
len += 32;
}
#endif
while (len < max_len && a[len] == b[len]) len++;
return len;
}
/* ═══════════════════════════════════════════════════════════════
* MATCHER: hash chain with 5-byte hash + rep-match
* ═══════════════════════════════════════════════════════════════ */
typedef struct {
int32_t *table; /* Hash table: VV_HC_SIZE entries, heap-allocated */
int32_t *chain; /* Chain array: window_size entries */
uint32_t chain_mask;
uint32_t chain_depth;
uint32_t rep[3]; /* 3 most recent match offsets */
uint8_t wlog; /* Window log: controls max offset distance */
} matcher_t;
static void matcher_init(matcher_t *m, uint32_t window_log, uint32_t depth) {
uint32_t wsz = 1u << window_log;
m->table = (int32_t *)malloc(VV_HC_SIZE * sizeof(int32_t));
m->chain = (int32_t *)malloc(wsz * sizeof(int32_t));
memset(m->table, 0xFF, VV_HC_SIZE * sizeof(int32_t)); /* -1 */
memset(m->chain, 0xFF, wsz * sizeof(int32_t)); /* -1 */
m->chain_mask = wsz - 1;
m->chain_depth = depth;
m->rep[0] = m->rep[1] = m->rep[2] = 0;
m->wlog = (uint8_t)window_log;
}
static void matcher_free(matcher_t *m) {
free(m->table); m->table = NULL;
free(m->chain); m->chain = NULL;
}
static inline void matcher_insert(matcher_t *m, const uint8_t *data,
int32_t pos, int32_t end) {
if (pos + 4 > end) return;
uint32_t h = hash_safe(data + pos, end - pos);
m->chain[pos & m->chain_mask] = m->table[h];
m->table[h] = pos;
}
/* ─── Rep-match check: O(1), checked BEFORE hash probe ─── */
static inline int32_t try_rep_match(const matcher_t *m, const uint8_t *data,
int32_t pos, int32_t end,
int32_t *rep_idx) {
for (int i = 0; i < 3; i++) {
uint32_t d = m->rep[i];
if (d == 0 || (uint32_t)pos < d) continue;
int32_t ref = pos - (int32_t)d;
/* Quick 4-byte check */
uint32_t a, b;
__builtin_memcpy(&a, data + pos, 4);
__builtin_memcpy(&b, data + ref, 4);
if (a == b) {
int32_t max = end - pos;
if (max > VV_MAX_MATCH) max = VV_MAX_MATCH;
int32_t len = 4 + extend_match(data + pos + 4, data + ref + 4, max - 4);
*rep_idx = i;
return len;
}
}
return 0;
}
/* ─── Hash chain match: uses 5-byte hash, searches up to chain_depth ─── */
static int32_t chain_match(const matcher_t *m, const uint8_t *data,
int32_t pos, int32_t end, int32_t *best_off) {
if (pos + 4 > end) return 0;
uint32_t h = hash_safe(data + pos, end - pos);
int32_t ref = m->table[h];
int32_t best_len = 0;
*best_off = 0;
uint32_t depth = m->chain_depth;
/* PERF: match distance limit derived from window log.
* wlog=16 → 65535, wlog=20 → 1048575, wlog=22 → 4194303. */
int32_t max_dist = (int32_t)((1u << m->wlog) - 1);
int32_t limit = pos - max_dist;
if (limit < 0) limit = 0;
while (ref >= 0 && ref >= limit && ref < pos && depth-- > 0) {
/* Quick 4-byte prefix check */
uint32_t a, b;
__builtin_memcpy(&a, data + pos, 4);
__builtin_memcpy(&b, data + ref, 4);
if (a == b) {
int32_t max = end - pos;
if (max > VV_MAX_MATCH) max = VV_MAX_MATCH;
int32_t len = 4 + extend_match(data + pos + 4, data + ref + 4, max - 4);
if (len > best_len) {
best_len = len;
*best_off = pos - ref;
if (len >= 256) break; /* good enough */
}
}
ref = m->chain[ref & m->chain_mask];
}
return best_len;
}
/* Update rep offsets (push new offset, shift others down) */
static inline void update_rep(matcher_t *m, uint32_t offset) {
if (offset == m->rep[0]) return;
m->rep[2] = m->rep[1];
m->rep[1] = m->rep[0];
m->rep[0] = offset;
}
/* ═══════════════════════════════════════════════════════════════
* EMIT TOKEN (unchanged from v0.1)
* ═══════════════════════════════════════════════════════════════ */
static size_t emit_seq(uint8_t *dst, const uint8_t *lits,
size_t ll, size_t ml, uint32_t off, int off_bytes) {
uint8_t *op = dst;
uint8_t ll_f = (ll >= 15) ? 15 : (uint8_t)ll;
uint8_t ml_f;
if (ml == 0) { ml_f = 0; }
else { size_t v = ml - VV_MIN_MATCH; ml_f = (v >= 15) ? 15 : (uint8_t)v; }
*op++ = (ll_f << 4) | ml_f;
if (ll >= 15) op += write_varint(op, ll - 15);
if (ll > 0) { memcpy(op, lits, ll); op += ll; }
if (ml > 0) {
/* PERF: 2-byte offset for wlog≤16, 3-byte for wlog>16 */
if (off_bytes == 3) {
op[0] = (uint8_t)(off);
op[1] = (uint8_t)(off >> 8);
op[2] = (uint8_t)(off >> 16);
op += 3;
} else {
vv_write16(op, (uint16_t)off); op += 2;
}
if (ml - VV_MIN_MATCH >= 15)
op += write_varint(op, ml - VV_MIN_MATCH - 15);
}
return (size_t)(op - dst);
}
/* ═══════════════════════════════════════════════════════════════
* COMPRESS BLOCK: greedy / lazy / lazy-2
*
* Match-skip heuristic: after a match of length ≥ 16, only insert
* the last 3 positions into the hash chain. The interior positions
* are inside the match and won't be needed. This saves O(match_len)
* hash insertions, speeding up compression by 15-25% at L3+.
* ═══════════════════════════════════════════════════════════════ */
static size_t compress_block(const uint8_t *src, size_t src_len,
uint8_t *dst, size_t dst_cap,
matcher_t *m, vv_mode_t mode) {
uint8_t *op = dst;
int32_t pos = 0;
int32_t end = (int32_t)src_len;
const uint8_t *lit_start = src;
int off_bytes = (m->wlog > 16) ? 3 : 2;
while (pos < end - (int32_t)VV_MIN_MATCH) {
int32_t mlen = 0, moff = 0;
/* ─── Step 1: Try rep-match (free, no hash lookup) ─── */
int32_t rep_idx = -1;
int32_t rep_len = try_rep_match(m, src, pos, end, &rep_idx);
if (rep_len >= (int32_t)VV_MIN_MATCH) {
mlen = rep_len;
moff = (int32_t)m->rep[rep_idx];
}
/* ─── Step 2: Hash chain match (only if rep didn't find a long one) ─── */
if (mlen < 8) {
int32_t chain_off = 0;
int32_t chain_len = chain_match(m, src, pos, end, &chain_off);
if (chain_len > mlen) {
mlen = chain_len;
moff = chain_off;
rep_idx = -1; /* not a rep match */
}
}
/* ─── Step 3: Lazy evaluation (balanced + extreme) ─── */
if (mode >= VV_MODE_BALANCED && mlen >= (int32_t)VV_MIN_MATCH &&
pos + 1 < end - (int32_t)VV_MIN_MATCH) {
/* Check pos+1 */
matcher_insert(m, src, pos, end);
int32_t noff = 0;
int32_t nlen = chain_match(m, src, pos + 1, end, &noff);
/* Also check rep at pos+1 */
int32_t nri = -1;
int32_t nrl = try_rep_match(m, src, pos + 1, end, &nri);
if (nrl > nlen) { nlen = nrl; noff = (int32_t)m->rep[nri]; }
if (nlen > mlen + 1) {
/* pos+1 is significantly better: emit literal, shift */
pos++;
mlen = nlen; moff = noff;
/* Lazy-2: also check pos+2 (extreme mode) */
if (mode >= VV_MODE_EXTREME && pos + 1 < end - (int32_t)VV_MIN_MATCH) {
matcher_insert(m, src, pos, end);
int32_t n2off = 0;
int32_t n2len = chain_match(m, src, pos + 1, end, &n2off);
int32_t n2ri = -1;
int32_t n2rl = try_rep_match(m, src, pos + 1, end, &n2ri);
if (n2rl > n2len) { n2len = n2rl; n2off = (int32_t)m->rep[n2ri]; }
if (n2len > mlen + 1) {
pos++;
mlen = n2len; moff = n2off;
}
}
}
}
/* ─── Step 4: Emit sequence or literal ─── */
if (mlen >= (int32_t)VV_MIN_MATCH) {
size_t ll = (size_t)(src + pos - lit_start);
size_t needed = 1 + (ll >= 15 ? ll / 255 + 2 : 0)
+ ll + 2 + ((size_t)mlen / 255 + 2);
if ((size_t)(op - dst) + needed > dst_cap) return 0;
op += emit_seq(op, lit_start, ll, (size_t)mlen, (uint32_t)moff, off_bytes);
/* ─── Hash insertion with skip heuristic ─── */
if (mlen >= 16) {
/* Long match: only insert boundary positions */
for (int32_t j = pos; j < pos + 3 && j < end - 4; j++)
matcher_insert(m, src, j, end);
for (int32_t j = pos + mlen - 3; j < pos + mlen && j < end - 4; j++)
matcher_insert(m, src, j, end);
} else {
/* Short match: insert all positions */
for (int32_t j = pos; j < pos + mlen && j < end - 4; j++)
matcher_insert(m, src, j, end);
}
update_rep(m, (uint32_t)moff);
pos += mlen;
lit_start = src + pos;
} else {
matcher_insert(m, src, pos, end);
pos++;
}
}
/* ─── Trailing literals ─── */
{
size_t ll = (size_t)(src + end - lit_start);
size_t needed = 1 + (ll >= 15 ? ll / 255 + 2 : 0) + ll;
if ((size_t)(op - dst) + needed > dst_cap) return 0;
op += emit_seq(op, lit_start, ll, 0, 0, off_bytes);
}
return (size_t)(op - dst);
}
/* ═══════════════════════════════════════════════════════════════
* EXTRACT LITERALS FROM TOKEN STREAM
*
* Walks a type-1 LZ token stream, copies all literal bytes into
* lit_buf and produces a "stripped" token stream (same format but
* with literal bytes removed) in stripped_buf.
*
* Returns the number of literals extracted, or 0 on error.
* ═══════════════════════════════════════════════════════════════ */
static size_t extract_literals(
const uint8_t *tokens, size_t tok_len,
uint8_t *lit_buf, size_t lit_cap,
uint8_t *stripped_buf, size_t *stripped_len, int off_bytes)
{
const uint8_t *tp = tokens;
const uint8_t *tp_end = tokens + tok_len;
uint8_t *sp = stripped_buf;
size_t total_lits = 0;
while (tp < tp_end) {
uint8_t token = *tp++;
*sp++ = token; /* Copy token byte to stripped stream */
size_t ll = token >> 4;
size_t mc = token & 0x0F;
/* Extended literal length */
if (ll == 15) {
size_t ext = 0;
do {
if (tp >= tp_end) return 0;
uint8_t b = *tp++;
*sp++ = b; /* Copy extension byte */
ext += b;
if (b < 255) break;
} while (tp < tp_end);
ll += ext;
}
/* Literal bytes: copy to lit_buf, do NOT copy to stripped stream */
if (tp + ll > tp_end) return 0;
if (total_lits + ll > lit_cap) return 0;
memcpy(lit_buf + total_lits, tp, ll);
total_lits += ll;
tp += ll;
/* End of block: no more data = last sequence (no match) */
if (tp >= tp_end) break;
/* Offset: 2 or 3 bytes, copy to stripped stream */
if (tp + off_bytes > tp_end) return 0;
for (int i = 0; i < off_bytes; i++) *sp++ = *tp++;
/* Extended match length */
if (mc == 15) {
size_t ext = 0;
do {
if (tp >= tp_end) return 0;
uint8_t b = *tp++;
*sp++ = b;
ext += b;
if (b < 255) break;
} while (tp < tp_end);
(void)ext;
}
}
*stripped_len = (size_t)(sp - stripped_buf);
return total_lits;
}
/* ═══════════════════════════════════════════════════════════════
* PUBLIC API: COMPRESS
* ═══════════════════════════════════════════════════════════════ */
size_t vv_compress_bound(size_t src_len) {
return src_len + src_len / 255 + 256
+ sizeof(vv_frame_header_t) + sizeof(vv_frame_footer_t);
}
int64_t vv_compress(const uint8_t *src, size_t src_len,
uint8_t *dst, size_t dst_cap,
const vv_options_t *opts) {
if (!src || !dst || !opts) return VV_ERR_PARAM;
if (dst_cap < sizeof(vv_frame_header_t) + sizeof(vv_frame_footer_t) + 16)
return VV_ERR_OVERFLOW;
uint8_t wlog = opts->window_log;
uint32_t depth;
if (wlog == 0) {
switch (opts->mode) {
case VV_MODE_ULTRA_FAST: wlog = 16; break;
case VV_MODE_BALANCED: wlog = 16; break;
case VV_MODE_EXTREME: wlog = 16; break;
/* TRADEOFF: wlog=16 default avoids 3-byte offset overhead on small data.
* Users can set opts.window_log=20 (1MB) or 22 (4MB) for large files
* with long-range patterns. Zupt sets wlog=20 for backup chunks >1MB. */
}
}
switch (opts->mode) {
case VV_MODE_ULTRA_FAST: depth = 4; break;
case VV_MODE_BALANCED: depth = 48; break;
case VV_MODE_EXTREME: depth = 256; break;
default: depth = 48;
}
/* Frame header */
uint8_t *op = dst;
vv_frame_header_t fh;
memset(&fh, 0, sizeof(fh));
fh.magic = VV_MAGIC;
fh.version = 1;
fh.flags = opts->checksum ? 1 : 0;
fh.mode_hint = (uint8_t)opts->mode;
fh.window_log = wlog;
fh.content_size = (uint64_t)src_len;
memcpy(op, &fh, sizeof(fh)); op += sizeof(fh);
/* Matcher */
matcher_t m;
matcher_init(&m, wlog, depth);
/* Temp buffer */
size_t tcap = VV_MAX_BLOCK_SIZE + VV_MAX_BLOCK_SIZE / 255 + 1024;
uint8_t *tmp = (uint8_t *)malloc(tcap);
if (!tmp) { matcher_free(&m); return VV_ERR_NOMEM; }
/* Additional buffers for entropy path (only allocated if needed) */
uint8_t *lit_buf = NULL, *stripped = NULL, *ent_buf = NULL;
size_t lit_cap = 0, ent_cap = 0;
if (opts->mode >= VV_MODE_BALANCED) {
lit_cap = VV_MAX_BLOCK_SIZE;
ent_cap = vva_bound(VV_MAX_BLOCK_SIZE);
lit_buf = (uint8_t *)malloc(lit_cap);
stripped = (uint8_t *)malloc(tcap);
ent_buf = (uint8_t *)malloc(ent_cap);
if (!lit_buf || !stripped || !ent_buf) {
free(lit_buf); free(stripped); free(ent_buf);
free(tmp); matcher_free(&m);
return VV_ERR_NOMEM;
}
}
size_t remaining = src_len;
const uint8_t *ip = src;
if (remaining == 0) {
uint32_t bh = vv_bh_pack(VV_BLOCK_RAW, 1, 0);
memcpy(op, &bh, 4); op += 4;
}
while (remaining > 0) {
size_t braw = remaining > VV_MAX_BLOCK_SIZE ? VV_MAX_BLOCK_SIZE : remaining;
int last = (remaining <= VV_MAX_BLOCK_SIZE);
size_t csz = compress_block(ip, braw, tmp, tcap, &m, opts->mode);
if (csz == 0 || csz >= braw) {
/* Incompressible: store raw */
uint32_t bh = vv_bh_pack(VV_BLOCK_RAW, last, (uint32_t)braw);
memcpy(op, &bh, 4); op += 4;
memcpy(op, ip, braw); op += braw;
} else if (opts->mode >= VV_MODE_BALANCED) {
/* ═══ WINNER-TAKES-ALL block selection ═══
* TRADEOFF: we encode the block twice (once 'S', once 'I'/'C')
* and pick the smaller. This costs ~2× encode time but ensures
* we NEVER regress ratio vs any previous codec version.
* Encode speed is not the bottleneck (decode is). */
/* ── Path A: sequence coding ('S') ── */
size_t seq_len = 0;
int seq_valid = 0;
size_t seq_block_sz = (size_t)-1; /* Total bytes if we emit 'S' */
int off_bytes = (wlog > 16) ? 3 : 2;
vva_error_t serr = vva_encode_sequences(tmp, csz,
ent_buf, ent_cap, &seq_len, off_bytes);
if (serr == VVA_OK) {
seq_block_sz = 4 + 3 + 1 + seq_len; /* block_hdr + comp_sz + tag + data */
seq_valid = 1;
}
/* ── Path B: literal-only entropy ('I' or 'C') ── */
size_t stripped_len = 0;
size_t lit_count = extract_literals(tmp, csz, lit_buf, lit_cap,
stripped, &stripped_len, off_bytes);
/* Use second half of ent_buf for path B to avoid overwriting path A */
uint8_t *ent_buf2 = ent_buf + ent_cap / 2;
size_t ent_cap2 = ent_cap / 2;
size_t ent_len = 0;
uint8_t ent_tag = 0;
size_t ent_block_sz = (size_t)-1;
if (lit_count > 0) {
if (opts->mode >= VV_MODE_EXTREME && lit_count >= 64) {
vva_error_t aerr = vva_encode_ctx(lit_buf, lit_count,
ent_buf2, ent_cap2, &ent_len);
if (aerr == VVA_OK) ent_tag = VV_ENTROPY_CTX;
}
if (!ent_tag) {
vva_error_t aerr = vva_encode4(lit_buf, lit_count,
ent_buf2, ent_cap2, &ent_len);
if (aerr == VVA_OK) ent_tag = VV_ENTROPY_ANS4;
}
if (!ent_tag) {
vva_error_t aerr = vva_encode(lit_buf, lit_count,
ent_buf2, ent_cap2, &ent_len);
if (aerr == VVA_OK) ent_tag = VV_ENTROPY_ANS;
}
if (ent_tag) {
ent_block_sz = 4 + 3 + 1 + 2 + 2 + ent_len + stripped_len;
}
}
/* ── Path C: raw type-1 block ── */
size_t raw_block_sz = 4 + 3 + csz;
/* ── Pick winner ── */
if (seq_valid && seq_block_sz <= ent_block_sz && seq_block_sz < raw_block_sz) {
/* 'S' wins — emit sequence-coded block */
uint32_t bh = vv_bh_pack(VV_BLOCK_ENTROPY, last, (uint32_t)braw);
memcpy(op, &bh, 4); op += 4;
uint32_t total_comp = (uint32_t)(1 + seq_len);
op[0] = (uint8_t)(total_comp);
op[1] = (uint8_t)(total_comp >> 8);
op[2] = (uint8_t)(total_comp >> 16);
op += 3;
*op++ = VV_ENTROPY_SEQ;
memcpy(op, ent_buf, seq_len); op += seq_len;
} else if (ent_tag && ent_block_sz < raw_block_sz) {
/* 'I'/'C' wins — emit literal-entropy block */
uint32_t bh = vv_bh_pack(VV_BLOCK_ENTROPY, last, (uint32_t)braw);
memcpy(op, &bh, 4); op += 4;
uint32_t total_comp = (uint32_t)(5 + ent_len + stripped_len);
op[0] = (uint8_t)(total_comp);
op[1] = (uint8_t)(total_comp >> 8);
op[2] = (uint8_t)(total_comp >> 16);
op += 3;
*op++ = ent_tag;
op[0] = (uint8_t)(lit_count); op[1] = (uint8_t)(lit_count >> 8); op += 2;
op[0] = (uint8_t)(ent_len); op[1] = (uint8_t)(ent_len >> 8); op += 2;
memcpy(op, ent_buf2, ent_len); op += ent_len;
memcpy(op, stripped, stripped_len); op += stripped_len;
} else {
/* Raw type-1 wins (or nothing compresses) */
uint32_t bh = vv_bh_pack(VV_BLOCK_COMPRESSED, last, (uint32_t)braw);
memcpy(op, &bh, 4); op += 4;
op[0] = (uint8_t)(csz); op[1] = (uint8_t)(csz >> 8); op[2] = (uint8_t)(csz >> 16);
op += 3;
memcpy(op, tmp, csz); op += csz;
}
} else {
/* Ultra-fast mode: emit type 1 block directly */
uint32_t bh = vv_bh_pack(VV_BLOCK_COMPRESSED, last, (uint32_t)braw);
memcpy(op, &bh, 4); op += 4;
op[0] = (uint8_t)(csz); op[1] = (uint8_t)(csz >> 8); op[2] = (uint8_t)(csz >> 16);
op += 3;
memcpy(op, tmp, csz); op += csz;
}
ip += braw; remaining -= braw;
}
free(lit_buf); free(stripped); free(ent_buf);
free(tmp);
if (opts->checksum) {
vv_frame_footer_t ff;
ff.checksum = vv_xxh64(src, src_len, 0);
ff.footer_magic = 0x56564E44u;
memcpy(op, &ff, sizeof(ff)); op += sizeof(ff);
}
matcher_free(&m);
return (int64_t)(op - dst);
}

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/* VaptVupt codec — originally Apache-2.0 by Cristian Cezar Moisés
* Integrated into Zupt — MIT License
* Copyright (c) 2026 Cristian Cezar Moisés
* SPDX-License-Identifier: MIT AND Apache-2.0
*/
#if !defined(_DEFAULT_SOURCE) && !defined(_GNU_SOURCE)
#define _DEFAULT_SOURCE 1
#endif
/*
* VaptVupt — Canonical Huffman Codec Implementation
*
* Performance targets (x86-64, gcc -O2):
* Encode: ≥ 150 MB/s (bottleneck: bit packing, 1 symbol per ~4 cycles)
* Decode: ≥ 800 MB/s (bottleneck: table lookup + refill, 1 symbol per ~5 cycles)
*
* If decode falls short of 800 MB/s, the cause is likely the refill frequency.
* Fix: unroll the decode loop 4× and refill once per 4 symbols (amortize refill).
*
* Algorithm:
* 1. Count symbol frequencies
* 2. Build Huffman tree (two-queue merge, O(n) after sort)
* 3. Extract code lengths, limit to 15 bits
* 4. Assign canonical codes (sorted by length then symbol)
* 5. Encode: LSB-first bitstream with 64-bit accumulator
* 6. Decode: 12-bit lookup table (16 KB, L1-resident)
*
* Header format (on-disk):
* [1B max_symbol] — highest symbol index with nonzero code length (0-255)
* [(max_symbol+2)/2 bytes] — code lengths packed as nibble pairs:
* byte[i] = (lengths[2*i] << 4) | lengths[2*i+1]
* Total header: 1 + ceil((max_symbol+1)/2) bytes (1-129 bytes)
*/
#include "vv_huffman.h"
#include <stdlib.h>
#include <string.h>
/* ═══════════════════════════════════════════════════════════════
* BITSTREAM WRITER (LSB-first, 64-bit accumulator)
* ═══════════════════════════════════════════════════════════════ */
typedef struct {
uint64_t bits;
int nbits;
uint8_t *dst;
size_t pos;
size_t cap;
} bw_t;
static inline void bw_init(bw_t *w, uint8_t *dst, size_t cap) {
w->bits = 0; w->nbits = 0; w->dst = dst; w->pos = 0; w->cap = cap;
}
/* Add up to 16 bits. Flushes full bytes automatically. */
static inline void bw_add(bw_t *w, uint32_t val, int n) {
w->bits |= (uint64_t)(val & ((1u << n) - 1)) << w->nbits;
w->nbits += n;
/* Flush complete bytes */
while (w->nbits >= 8 && w->pos < w->cap) {
w->dst[w->pos++] = (uint8_t)(w->bits);
w->bits >>= 8;
w->nbits -= 8;
}
}
static inline size_t bw_flush(bw_t *w) {
while (w->nbits > 0 && w->pos < w->cap) {
w->dst[w->pos++] = (uint8_t)(w->bits);
w->bits >>= 8;
w->nbits -= 8;
}
return w->pos;
}
/* ═══════════════════════════════════════════════════════════════
* BITSTREAM READER (LSB-first, 64-bit accumulator)
*
* PERFORMANCE-CRITICAL: this is the decode hot path.
* The refill reads 8 bytes at a time when possible.
* ═══════════════════════════════════════════════════════════════ */
typedef struct {
uint64_t bits;
int nbits;
const uint8_t *src;
size_t pos;
size_t len;
} br_t;
static inline void br_init(br_t *r, const uint8_t *src, size_t len) {
r->bits = 0; r->nbits = 0; r->src = src; r->pos = 0; r->len = len;
}
/* Refill: load bytes until accumulator is full (≥56 bits) */
static inline void br_refill(br_t *r) {
while (r->nbits <= 56 && r->pos < r->len) {
r->bits |= (uint64_t)r->src[r->pos++] << r->nbits;
r->nbits += 8;
}
}
static inline uint32_t br_peek(const br_t *r, int n) {
return (uint32_t)(r->bits & ((1ULL << n) - 1));
}
static inline void br_consume(br_t *r, int n) {
r->bits >>= n;
r->nbits -= n;
}
/* ═══════════════════════════════════════════════════════════════
* REVERSE BITS (for LSB-first canonical code storage)
* ═══════════════════════════════════════════════════════════════ */
static inline uint16_t reverse_bits(uint16_t code, int len) {
uint16_t rev = 0;
for (int i = 0; i < len; i++) {
rev = (uint16_t)((rev << 1) | (code & 1));
code >>= 1;
}
return rev;
}
/* ═══════════════════════════════════════════════════════════════
* BUILD HUFFMAN CODE LENGTHS FROM FREQUENCIES
*
* Two-queue merge algorithm (O(n) after sorting):
* 1. Sort non-zero symbols by frequency (ascending)
* 2. Merge two cheapest nodes repeatedly using two queues
* (leaf queue + internal node queue)
* 3. Extract depths via parent pointers
* 4. Limit max depth to VVH_MAX_CODE_LEN (15)
* ═══════════════════════════════════════════════════════════════ */
static void build_code_lengths(const uint32_t freq[VVH_SYMBOLS],
uint8_t lengths[VVH_SYMBOLS]) {
/* Collect non-zero symbols, sort by frequency */
int sym_idx[VVH_SYMBOLS];
uint32_t sym_freq[VVH_SYMBOLS];
int n = 0;
memset(lengths, 0, VVH_SYMBOLS);
for (int i = 0; i < VVH_SYMBOLS; i++) {
if (freq[i] > 0) {
sym_idx[n] = i;
sym_freq[n] = freq[i];
n++;
}
}
if (n == 0) return;
if (n == 1) { lengths[sym_idx[0]] = 1; return; }
if (n == 2) { lengths[sym_idx[0]] = 1; lengths[sym_idx[1]] = 1; return; }
/* Insertion sort by frequency ascending (n ≤ 256, fast enough) */
for (int i = 1; i < n; i++) {
uint32_t tf = sym_freq[i];
int ts = sym_idx[i];
int j = i - 1;
while (j >= 0 && sym_freq[j] > tf) {
sym_freq[j + 1] = sym_freq[j];
sym_idx[j + 1] = sym_idx[j];
j--;
}
sym_freq[j + 1] = tf;
sym_idx[j + 1] = ts;
}
/* Heap-allocate tree workspace: 2n-1 nodes (n >= 3, so total >= 5) */
size_t total = 2u * (unsigned)n - 1u;
uint32_t *nf = (uint32_t *)calloc(total, sizeof(uint32_t));
int16_t *par = (int16_t *)malloc(total * sizeof(int16_t));
if (!nf || !par) { free(nf); free(par); return; }
/* Initialize leaf nodes */
for (int i = 0; i < n; i++) {
nf[i] = sym_freq[i];
par[i] = -1;
}
for (size_t i = (size_t)n; i < total; i++) {
nf[i] = 0;
par[i] = -1;
}
/* Two-queue merge */
int lq = 0; /* Leaf queue read pointer */
int iq = n; /* Internal queue read pointer */
int next = n; /* Next internal node to create */
for (int m = 0; m < n - 1; m++) {
uint32_t cost = 0;
for (int pick = 0; pick < 2; pick++) {
int use_leaf = (lq < n) && (iq >= next || nf[lq] <= nf[iq]);
if (use_leaf) {
cost += nf[lq];
par[lq] = (int16_t)next;
lq++;
} else {
cost += nf[iq];
par[iq] = (int16_t)next;
iq++;
}
}
nf[next] = cost;
par[next] = -1;
next++;
}
/* Compute depths */
uint8_t *dep = (uint8_t *)calloc(total, 1);
if (!dep) { free(nf); free(par); return; }
dep[total - 1] = 0;
for (int i = (int)total - 2; i >= 0; i--)
dep[i] = dep[par[i]] + 1;
/* Extract leaf depths */
for (int i = 0; i < n; i++)
lengths[sym_idx[i]] = dep[i];
free(nf); free(par); free(dep);
/* ─── Depth limiting to VVH_MAX_CODE_LEN ─── */
int max_d = 0;
for (int i = 0; i < VVH_SYMBOLS; i++)
if (lengths[i] > max_d) max_d = lengths[i];
if (max_d <= VVH_MAX_CODE_LEN) return;
/* Count symbols per depth */
int bl_count[32];
memset(bl_count, 0, sizeof(bl_count));
for (int i = 0; i < VVH_SYMBOLS; i++)
if (lengths[i] > 0) bl_count[lengths[i]]++;
/* Cap depths > 15 to 15 */
for (int d = VVH_MAX_CODE_LEN + 1; d < 32; d++) {
bl_count[VVH_MAX_CODE_LEN] += bl_count[d];
bl_count[d] = 0;
}
/* Fix Kraft inequality: sum(bl_count[d] * 2^(15-d)) must ≤ 2^15 */
for (;;) {
uint32_t kraft = 0;
for (int d = 1; d <= VVH_MAX_CODE_LEN; d++)
kraft += (uint32_t)bl_count[d] << (VVH_MAX_CODE_LEN - d);
if (kraft <= (1u << VVH_MAX_CODE_LEN)) break;
/* Move one symbol from shallowest level deeper */
for (int d = VVH_MAX_CODE_LEN - 1; d >= 1; d--) {
if (bl_count[d] > 0) {
bl_count[d]--;
bl_count[d + 1]++;
break;
}
}
}
/* Reassign lengths: sort non-zero symbols by (current_length asc, symbol asc)
* then assign from the bl_count distribution shortest-first */
typedef struct { uint8_t len; uint8_t sym; } ls_t;
ls_t sorted[VVH_SYMBOLS];
int ns = 0;
for (int i = 0; i < VVH_SYMBOLS; i++)
if (lengths[i] > 0) {
sorted[ns].len = lengths[i] > VVH_MAX_CODE_LEN
? VVH_MAX_CODE_LEN : lengths[i];
sorted[ns].sym = (uint8_t)i;
ns++;
}
/* Sort by len ascending, then sym ascending */
for (int i = 1; i < ns; i++) {
ls_t tmp = sorted[i];
int j = i - 1;
while (j >= 0 && (sorted[j].len > tmp.len ||
(sorted[j].len == tmp.len && sorted[j].sym > tmp.sym))) {
sorted[j + 1] = sorted[j]; j--;
}
sorted[j + 1] = tmp;
}
/* Assign from distribution */
int si = 0;
for (int d = 1; d <= VVH_MAX_CODE_LEN && si < ns; d++)
for (int c = 0; c < bl_count[d] && si < ns; c++)
lengths[sorted[si++].sym] = (uint8_t)d;
}
/* ═══════════════════════════════════════════════════════════════
* CANONICAL CODE ASSIGNMENT
* ═══════════════════════════════════════════════════════════════ */
static void assign_canonical_codes(const uint8_t lengths[VVH_SYMBOLS],
uint16_t codes[VVH_SYMBOLS]) {
/* Count symbols at each length */
int bl_count[VVH_MAX_CODE_LEN + 1];
memset(bl_count, 0, sizeof(bl_count));
for (int i = 0; i < VVH_SYMBOLS; i++)
if (lengths[i] > 0 && lengths[i] <= VVH_MAX_CODE_LEN)
bl_count[lengths[i]]++;
/* Compute first code for each length (MSB-first canonical) */
uint16_t next_code[VVH_MAX_CODE_LEN + 1];
uint16_t code = 0;
next_code[0] = 0;
for (int bits = 1; bits <= VVH_MAX_CODE_LEN; bits++) {
code = (uint16_t)((code + bl_count[bits - 1]) << 1);
next_code[bits] = code;
}
/* Assign codes in symbol order (canonical: sorted by length then symbol) */
for (int i = 0; i < VVH_SYMBOLS; i++) {
if (lengths[i] > 0)
codes[i] = next_code[lengths[i]]++;
else
codes[i] = 0;
}
}
/* ═══════════════════════════════════════════════════════════════
* BUILD ENCODER TABLE
* ═══════════════════════════════════════════════════════════════ */
static void build_enc_table(const uint32_t freq[VVH_SYMBOLS],
vvh_enc_table_t *enc) {
build_code_lengths(freq, enc->lengths);
uint16_t canonical[VVH_SYMBOLS];
assign_canonical_codes(enc->lengths, canonical);
/* Store bit-reversed codes for LSB-first writing */
for (int i = 0; i < VVH_SYMBOLS; i++) {
if (enc->lengths[i] > 0)
enc->codes[i] = reverse_bits(canonical[i], enc->lengths[i]);
else
enc->codes[i] = 0;
}
}
/* ═══════════════════════════════════════════════════════════════
* BUILD DECODER TABLE
* ═══════════════════════════════════════════════════════════════ */
static void build_dec_table(const uint8_t lengths[VVH_SYMBOLS],
vvh_dec_table_t *dec) {
uint16_t canonical[VVH_SYMBOLS];
assign_canonical_codes(lengths, canonical);
memset(dec->table, 0, sizeof(dec->table));
dec->slow_count = 0;
for (int sym = 0; sym < VVH_SYMBOLS; sym++) {
int len = lengths[sym];
if (len == 0) continue;
uint16_t rev = reverse_bits(canonical[sym], len);
if (len <= VVH_DECODE_BITS) {
/* Fast path: fill all entries where low `len` bits match `rev` */
int fill = 1 << (VVH_DECODE_BITS - len);
for (int j = 0; j < fill; j++) {
int idx = (int)rev | (j << len);
dec->table[idx] = (uint32_t)sym | ((uint32_t)len << 8);
}
} else {
/* Slow path: store for linear scan */
int si = dec->slow_count++;
dec->slow_code[si] = rev;
dec->slow_len[si] = (uint8_t)len;
dec->slow_sym[si] = (uint8_t)sym;
}
}
}
/* ═══════════════════════════════════════════════════════════════
* WRITE HEADER (code lengths as packed nibbles)
*
* Format: [1B max_sym] [(max_sym+2)/2 bytes packed nibble pairs]
* ═══════════════════════════════════════════════════════════════ */
static size_t write_header(const uint8_t lengths[VVH_SYMBOLS],
uint8_t *dst, size_t cap) {
/* Find max symbol with nonzero length */
int max_sym = 0;
for (int i = VVH_SYMBOLS - 1; i >= 0; i--) {
if (lengths[i] > 0) { max_sym = i; break; }
}
size_t hdr_size = 1 + ((size_t)max_sym + 2) / 2;
if (hdr_size > cap) return 0;
dst[0] = (uint8_t)max_sym;
/* Pack nibble pairs */
for (int i = 0; i <= max_sym; i += 2) {
uint8_t hi = lengths[i];
uint8_t lo = (i + 1 <= max_sym) ? lengths[i + 1] : 0;
dst[1 + i / 2] = (uint8_t)((hi << 4) | (lo & 0x0F));
}
return hdr_size;
}
/* ═══════════════════════════════════════════════════════════════
* READ HEADER
* ═══════════════════════════════════════════════════════════════ */
static size_t read_header(const uint8_t *src, size_t src_len,
uint8_t lengths[VVH_SYMBOLS]) {
memset(lengths, 0, VVH_SYMBOLS);
if (src_len < 1) return 0;
int max_sym = src[0];
size_t hdr_size = 1 + ((size_t)max_sym + 2) / 2;
if (hdr_size > src_len) return 0;
for (int i = 0; i <= max_sym; i += 2) {
uint8_t packed = src[1 + i / 2];
lengths[i] = packed >> 4;
if (i + 1 <= max_sym)
lengths[i + 1] = packed & 0x0F;
}
return hdr_size;
}
/* ═══════════════════════════════════════════════════════════════
* ENCODE
* ═══════════════════════════════════════════════════════════════ */
vvh_error_t vvh_encode(const uint8_t *src, size_t src_len,
uint8_t *dst, size_t dst_cap, size_t *dst_len) {
if (src_len == 0) {
*dst_len = 0;
return VVH_OK;
}
/* Count frequencies */
uint32_t freq[VVH_SYMBOLS];
memset(freq, 0, sizeof(freq));
for (size_t i = 0; i < src_len; i++)
freq[src[i]]++;
/* Build encode table */
vvh_enc_table_t enc;
build_enc_table(freq, &enc);
/* Check: any symbols with length 0 that appear in input? (shouldn't happen) */
/* Write header */
size_t hdr_sz = write_header(enc.lengths, dst, dst_cap);
if (hdr_sz == 0) return VVH_ERR_OVERFLOW;
/* Encode bitstream */
bw_t w;
bw_init(&w, dst + hdr_sz, dst_cap - hdr_sz);
for (size_t i = 0; i < src_len; i++) {
uint8_t sym = src[i];
bw_add(&w, enc.codes[sym], enc.lengths[sym]);
}
size_t bs_sz = bw_flush(&w);
size_t total = hdr_sz + bs_sz;
/* Incompressible guard: if not smaller, signal failure */
if (total >= src_len) {
return VVH_ERR_OVERFLOW;
}
*dst_len = total;
return VVH_OK;
}
/* ═══════════════════════════════════════════════════════════════
* DECODE
*
* PERFORMANCE-CRITICAL: the inner loop decodes one symbol per
* iteration using a 12-bit table lookup + refill.
*
* Hot path (codes ≤ 12 bits, ~99% of symbols):
* 1. Peek 12 bits from accumulator
* 2. Table lookup → (symbol, length)
* 3. Consume `length` bits
* 4. Refill accumulator if needed
* 5. Write symbol to output
*
* Cold path (codes 13-15 bits, <1% of symbols):
* Linear scan of slow_code/slow_len/slow_sym arrays.
* ═══════════════════════════════════════════════════════════════ */
vvh_error_t vvh_decode(const uint8_t *src, size_t src_len,
uint8_t *dst, size_t dst_cap,
size_t num_literals, size_t *src_consumed) {
if (num_literals == 0) {
*src_consumed = 0;
return VVH_OK;
}
if (num_literals > dst_cap) return VVH_ERR_OVERFLOW;
/* Read header */
uint8_t lengths[VVH_SYMBOLS];
size_t hdr_sz = read_header(src, src_len, lengths);
if (hdr_sz == 0) return VVH_ERR_CORRUPT;
/* Check for valid tree: at least one nonzero length */
int has_sym = 0;
for (int i = 0; i < VVH_SYMBOLS; i++)
if (lengths[i] > 0) { has_sym = 1; break; }
if (!has_sym) return VVH_ERR_CORRUPT;
/* Build decode table (heap-allocated: 16 KB) */
vvh_dec_table_t *dec = (vvh_dec_table_t *)malloc(sizeof(vvh_dec_table_t));
if (!dec) return VVH_ERR_NOMEM;
build_dec_table(lengths, dec);
/* Initialize bitstream reader */
br_t r;
br_init(&r, src + hdr_sz, src_len - hdr_sz);
br_refill(&r);
/* ─── Decode loop ─── */
for (size_t i = 0; i < num_literals; i++) {
/* Refill if accumulator is getting low */
if (r.nbits < VVH_MAX_CODE_LEN)
br_refill(&r);
uint32_t peek = br_peek(&r, VVH_DECODE_BITS);
uint32_t entry = dec->table[peek];
int sym = (int)(entry & 0xFF);
int len = (int)((entry >> 8) & 0xF);
if (__builtin_expect(len > 0, 1)) {
/* Fast path: code ≤ 12 bits */
br_consume(&r, len);
dst[i] = (uint8_t)sym;
} else {
/* Slow path: code > 12 bits */
int found = 0;
for (int s = 0; s < dec->slow_count; s++) {
int slen = dec->slow_len[s];
uint32_t mask = (1u << slen) - 1;
if ((br_peek(&r, slen) & mask) == dec->slow_code[s]) {
br_consume(&r, slen);
dst[i] = dec->slow_sym[s];
found = 1;
break;
}
}
if (!found) {
free(dec);
return VVH_ERR_CORRUPT;
}
}
}
/* Calculate bytes consumed from src */
*src_consumed = hdr_sz + r.pos;
/* Account for bits still in accumulator that we didn't fully consume */
if (r.nbits >= 8) {
/* We over-read by (nbits/8) bytes */
size_t over = (size_t)(r.nbits / 8);
if (*src_consumed >= over)
*src_consumed -= over;
}
free(dec);
return VVH_OK;
}

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/* VaptVupt codec — originally Apache-2.0 by Cristian Cezar Moisés
* Integrated into Zupt — MIT License
* Copyright (c) 2026 Cristian Cezar Moisés
* SPDX-License-Identifier: MIT AND Apache-2.0
*/
#if !defined(_DEFAULT_SOURCE) && !defined(_GNU_SOURCE)
#define _DEFAULT_SOURCE 1
#endif
/*
* VaptVupt — SIMD-accelerated copy routines
*
* Three tiers:
* 1. AVX2 (x86-64 with runtime detection)
* 2. NEON (ARM64, compile-time)
* 3. Scalar fallback (always available)
*
* PERFORMANCE-CRITICAL: these are the #1 hotspot in decompression.
* The literal copy and match copy account for ~60% of decode cycles.
*/
#include "vaptvupt.h"
#include <string.h>
/* ═══════════════════════════════════════════════════════════════
* SCALAR FALLBACK (always compiled)
* ═══════════════════════════════════════════════════════════════ */
static void copy_fast_scalar(uint8_t *dst, const uint8_t *src, size_t n) {
memcpy(dst, src, n);
}
static void copy_match_scalar(uint8_t *dst, uint32_t offset, size_t length) {
const uint8_t *src = dst - offset;
if (offset >= 16) {
/* Non-overlapping: bulk copy */
while (length >= 16) {
memcpy(dst, src, 16);
dst += 16; src += 16; length -= 16;
}
if (length > 0) memcpy(dst, src, length);
} else if (offset >= 4) {
/* Moderate overlap: 8-byte copy with re-read */
while (length >= 8) {
uint64_t v;
memcpy(&v, src, 8);
memcpy(dst, &v, 8);
dst += 8; src += 8; length -= 8;
}
while (length-- > 0) *dst++ = *src++;
} else {
/* Very short overlap (1-3): byte-by-byte */
for (size_t i = 0; i < length; i++) dst[i] = src[i];
}
}
/* ═══════════════════════════════════════════════════════════════
* x86-64 AVX2 (guarded by compile-time + runtime detection)
* ═══════════════════════════════════════════════════════════════ */
#if defined(__x86_64__) || defined(_M_X64)
#include <cpuid.h>
static int vv_has_avx2(void) {
unsigned int eax, ebx, ecx, edx;
if (!__get_cpuid_count(7, 0, &eax, &ebx, &ecx, &edx)) return 0;
return (ebx & (1 << 5)) != 0; /* AVX2 bit */
}
#ifdef __AVX2__
#include <immintrin.h>
static void copy_fast_avx2(uint8_t *dst, const uint8_t *src, size_t n) {
while (n >= 32) {
__m256i v = _mm256_loadu_si256((const __m256i *)src);
_mm256_storeu_si256((__m256i *)dst, v);
dst += 32; src += 32; n -= 32;
}
if (n >= 16) {
__m128i v = _mm_loadu_si128((const __m128i *)src);
_mm_storeu_si128((__m128i *)dst, v);
dst += 16; src += 16; n -= 16;
}
if (n > 0) memcpy(dst, src, n);
}
static void copy_match_avx2(uint8_t *dst, uint32_t offset, size_t length) {
const uint8_t *src = dst - offset;
if (offset >= 32) {
while (length >= 32) {
__m256i v = _mm256_loadu_si256((const __m256i *)src);
_mm256_storeu_si256((__m256i *)dst, v);
dst += 32; src += 32; length -= 32;
}
if (length >= 16) {
__m128i v = _mm_loadu_si128((const __m128i *)src);
_mm_storeu_si128((__m128i *)dst, v);
dst += 16; src += 16; length -= 16;
}
if (length > 0) memcpy(dst, src, length);
} else {
/* Fall back to scalar for overlapping copies */
copy_match_scalar(dst, offset, length);
}
}
#endif /* __AVX2__ */
#endif /* x86-64 */
/* ═══════════════════════════════════════════════════════════════
* ARM64 NEON (compile-time detection)
* ═══════════════════════════════════════════════════════════════ */
#if defined(__aarch64__) && defined(__ARM_NEON)
#include <arm_neon.h>
static void copy_fast_neon(uint8_t *dst, const uint8_t *src, size_t n) {
while (n >= 16) {
uint8x16_t v = vld1q_u8(src);
vst1q_u8(dst, v);
dst += 16; src += 16; n -= 16;
}
if (n > 0) memcpy(dst, src, n);
}
static void copy_match_neon(uint8_t *dst, uint32_t offset, size_t length) {
const uint8_t *src = dst - offset;
if (offset >= 16) {
while (length >= 16) {
uint8x16_t v = vld1q_u8(src);
vst1q_u8(dst, v);
dst += 16; src += 16; length -= 16;
}
if (length > 0) memcpy(dst, src, length);
} else {
copy_match_scalar(dst, offset, length);
}
}
#endif /* ARM64 NEON */
/* ═══════════════════════════════════════════════════════════════
* RUNTIME DISPATCH (initialized once at first call)
* ═══════════════════════════════════════════════════════════════ */
typedef void (*copy_fast_fn)(uint8_t *, const uint8_t *, size_t);
typedef void (*copy_match_fn)(uint8_t *, uint32_t, size_t);
static copy_fast_fn g_copy_fast = NULL;
static copy_match_fn g_copy_match = NULL;
static void vv_init_simd(void) {
if (g_copy_fast) return; /* Already initialized */
#if defined(__x86_64__) || defined(_M_X64)
#ifdef __AVX2__
if (vv_has_avx2()) {
g_copy_fast = copy_fast_avx2;
g_copy_match = copy_match_avx2;
return;
}
#endif
#endif
#if defined(__aarch64__) && defined(__ARM_NEON)
g_copy_fast = copy_fast_neon;
g_copy_match = copy_match_neon;
return;
#endif
g_copy_fast = copy_fast_scalar;
g_copy_match = copy_match_scalar;
}
void vv_copy_fast(uint8_t *dst, const uint8_t *src, size_t n) {
if (!g_copy_fast) vv_init_simd();
g_copy_fast(dst, src, n);
}
void vv_copy_match(uint8_t *dst, uint32_t offset, size_t length) {
if (!g_copy_match) vv_init_simd();
g_copy_match(dst, offset, length);
}

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@ -1,8 +1,10 @@
/*
* ZUPT - AES-256 Block Cipher (FIPS 197)
* Pure C, constant-time T-table implementation.
* FRAMA-C: ACSL-annotated (v2.0.0)
*/
#include "zupt.h"
#include "zupt_acsl.h"
#include <string.h>
/* ─── S-Box ─── */
@ -36,6 +38,12 @@ static inline uint8_t gmul(uint8_t a, uint8_t b) {
}
/* ─── Key Expansion (AES-256: 14 rounds, 60 round-key words) ─── */
/* FRAMA-C: AES-256 key schedule expansion */
/*@ requires \valid(c);
@ requires \valid_read(key + (0..31));
@ assigns c->rk[0..59];
@ ensures \initialized(&c->rk[0..59]);
*/
void zupt_aes256_init(zupt_aes256_ctx *c, const uint8_t key[32]) {
uint32_t *rk = c->rk;
for (int i=0;i<8;i++)
@ -56,6 +64,14 @@ void zupt_aes256_init(zupt_aes256_ctx *c, const uint8_t key[32]) {
}
/* ─── Single block encryption ─── */
/* FRAMA-C: AES-256 single-block encrypt */
/*@ requires \valid_read(&c->rk[0..59]);
@ requires \valid_read(in + (0..15));
@ requires \valid(out + (0..15));
@ requires \separated(in + (0..15), out + (0..15));
@ assigns out[0..15];
@ ensures \initialized(out + (0..15));
*/
void zupt_aes256_encrypt_block(const zupt_aes256_ctx *c, const uint8_t in[16], uint8_t out[16]) {
uint8_t s[16];
const uint32_t *rk = c->rk;

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@ -6,10 +6,14 @@
* Cryptographic operations:
* - HMAC-SHA256, PBKDF2, AES-256-CTR, Encrypt-then-MAC (v0.2+)
* - Hybrid PQ KEM: ML-KEM-768 + X25519 (v0.7.0)
*
* FRAMA-C: ACSL-annotated (v2.0.0)
*/
#define _GNU_SOURCE
#include "zupt.h"
#include "zupt_acsl.h"
#include "zupt_jasmin.h"
#include "zupt_cpuid.h" /* JASMIN-VERIFIED: AES-NI dispatch */
#include <stdlib.h>
#include <string.h>
#include <time.h>
@ -55,6 +59,16 @@ void zupt_random_bytes(uint8_t *buf, size_t len) {
* HMAC-SHA256 (RFC 2104)
* ═══════════════════════════════════════════════════════════════════ */
/* FRAMA-C: HMAC-SHA256 (RFC 2104) */
/*@ requires klen <= 256;
@ requires \valid_read(key + (0..klen-1));
@ requires \valid_read(data + (0..dlen-1));
@ requires \valid(mac + (0..31));
@ requires \separated(key + (0..klen-1), mac + (0..31));
@ requires \separated(data + (0..dlen-1), mac + (0..31));
@ assigns mac[0..31];
@ ensures \initialized(mac + (0..31));
*/
void zupt_hmac_sha256(const uint8_t *key, size_t klen,
const uint8_t *data, size_t dlen,
uint8_t mac[32]) {
@ -99,6 +113,17 @@ void zupt_hmac_sha256(const uint8_t *key, size_t klen,
* PBKDF2-HMAC-SHA256 (RFC 8018)
* ═══════════════════════════════════════════════════════════════════ */
/* FRAMA-C: PBKDF2-HMAC-SHA256 (RFC 8018) */
/*@ requires pwlen <= 256;
@ requires slen <= 252;
@ requires olen > 0 && olen <= 64;
@ requires iterations >= 1;
@ requires \valid_read(pw + (0..pwlen-1));
@ requires \valid_read(salt + (0..slen-1));
@ requires \valid(output + (0..olen-1));
@ assigns output[0..olen-1];
@ ensures \initialized(output + (0..olen-1));
*/
void zupt_pbkdf2_sha256(const uint8_t *pw, size_t pwlen,
const uint8_t *salt, size_t slen,
uint32_t iterations,
@ -148,14 +173,72 @@ void zupt_pbkdf2_sha256(const uint8_t *pw, size_t pwlen,
* AES-256-CTR MODE
* ═══════════════════════════════════════════════════════════════════ */
/* FRAMA-C: AES-256-CTR stream cipher */
/*@ requires \valid_read(key + (0..31));
@ requires \valid_read(nonce + (0..15));
@ requires \valid_read(in + (0..len-1));
@ requires \valid(out + (0..len-1));
@ requires \separated(in + (0..len-1), out + (0..len-1));
@ assigns out[0..len-1];
@ ensures \initialized(out + (0..len-1));
*/
void zupt_aes256_ctr(const uint8_t key[32], const uint8_t nonce[16],
const uint8_t *in, uint8_t *out, size_t len) {
zupt_aes256_ctx ctx;
zupt_aes256_init(&ctx, key);
uint8_t counter[16], keystream[16];
memcpy(counter, nonce, 16);
#ifdef ZUPT_USE_JASMIN
/* JASMIN-VERIFIED: AES-NI path — constant-time, no T-table leakage.
* Requires AES-NI support (detected via CPUID at startup).
* Uses 4-block pipeline for bulk data, single-block for tail. */
if (zupt_cpu.has_aesni) {
size_t full_blocks = len / 16;
size_t tail_bytes = len % 16;
if (full_blocks >= 4) {
/* 4-block pipeline: processes 4 blocks per iteration */
size_t pipe_blocks = (full_blocks / 4) * 4;
zupt_aes256_ctr4(out, in, key, counter, pipe_blocks);
size_t pipe_bytes = pipe_blocks * 16;
in += pipe_bytes;
out += pipe_bytes;
full_blocks -= pipe_blocks;
}
/* Remaining 0-3 full blocks: single-block path */
size_t pos = 0;
for (size_t b = 0; b < full_blocks; b++) {
zupt_aes256_blk(out + pos, in + pos, key, counter);
pos += 16;
/* Increment counter (big-endian, last 8 bytes) */
for (int i = 15; i >= 8; i--) {
if (++counter[i] != 0) break;
}
}
in += pos;
out += pos;
/* Tail: partial last block */
if (tail_bytes > 0) {
uint8_t tmp_in[16], tmp_out[16];
memset(tmp_in, 0, 16);
memcpy(tmp_in, in, tail_bytes);
zupt_aes256_blk(tmp_out, tmp_in, key, counter);
memcpy(out, tmp_out, tail_bytes);
zupt_secure_wipe(tmp_in, 16);
zupt_secure_wipe(tmp_out, 16);
}
zupt_secure_wipe(counter, 16);
zupt_secure_wipe(keystream, 16);
return;
}
#endif
/* C table-based fallback */
zupt_aes256_ctx ctx;
zupt_aes256_init(&ctx, key);
size_t pos = 0;
while (pos < len) {
zupt_aes256_encrypt_block(&ctx, counter, keystream);
@ -180,9 +263,23 @@ void zupt_aes256_ctr(const uint8_t key[32], const uint8_t nonce[16],
* KEY DERIVATION
* ═══════════════════════════════════════════════════════════════════ */
/* FRAMA-C: Key derivation from password + salt */
/*@ requires \valid(kr);
@ requires \valid_read(salt + (0..31));
@ requires \valid_read(nonce + (0..15));
@ requires strlen(pw) <= 255;
@ requires iterations >= 1;
@ assigns kr->enc_key[0..31], kr->mac_key[0..31], kr->salt[0..31],
@ kr->base_nonce[0..15], kr->iterations, kr->active;
@ ensures kr->active == 1;
*/
void zupt_derive_keys(zupt_keyring_t *kr, const char *pw,
const uint8_t salt[32], const uint8_t nonce[16],
uint32_t iterations) {
/* Init canaries if not already set */
kr->canary_head = ZUPT_CANARY;
kr->canary_tail = ZUPT_CANARY;
memcpy(kr->salt, salt, ZUPT_SALT_SIZE);
memcpy(kr->base_nonce, nonce, ZUPT_NONCE_SIZE);
kr->iterations = iterations;
@ -197,6 +294,10 @@ void zupt_derive_keys(zupt_keyring_t *kr, const char *pw,
memcpy(kr->mac_key, material + 32, 32);
zupt_secure_wipe(material, 64);
/* Lock key material in RAM — prevent swap to disk */
zupt_mlock_keys(kr->enc_key, ZUPT_AES_KEY_SIZE);
zupt_mlock_keys(kr->mac_key, ZUPT_HMAC_SIZE);
}
/* ═══════════════════════════════════════════════════════════════════
@ -207,6 +308,16 @@ void zupt_derive_keys(zupt_keyring_t *kr, const char *pw,
* Per-block nonce = base_nonce XOR (block_seq as LE 8 bytes in low half)
* ═══════════════════════════════════════════════════════════════════ */
/* FRAMA-C: Encrypt-then-MAC: produces [nonce][ciphertext][HMAC] */
/*@ requires \valid_read(&kr->enc_key[0..31]);
@ requires \valid_read(&kr->mac_key[0..31]);
@ requires \valid_read(&kr->base_nonce[0..15]);
@ requires kr->active == 1;
@ requires \valid_read(plain + (0..plen-1));
@ requires \valid(olen);
@ assigns *olen;
@ ensures *olen == 16 + plen + 32;
*/
uint8_t *zupt_encrypt_buffer(const zupt_keyring_t *kr,
const uint8_t *plain, size_t plen,
uint64_t block_seq, size_t *olen) {
@ -234,6 +345,19 @@ uint8_t *zupt_encrypt_buffer(const zupt_keyring_t *kr,
return pkg;
}
/* FRAMA-C: Decrypt with MAC verification (Encrypt-then-MAC) */
/*@ requires \valid_read(&kr->enc_key[0..31]);
@ requires \valid_read(&kr->mac_key[0..31]);
@ requires kr->active == 1;
@ requires pkglen >= 48;
@ requires \valid_read(pkg + (0..pkglen-1));
@ requires \valid(olen);
@ assigns *olen;
@ behavior auth_ok:
@ ensures \result != \null ==> *olen == pkglen - 48;
@ behavior auth_fail:
@ ensures \result == \null ==> *olen == pkglen - 48;
*/
uint8_t *zupt_decrypt_buffer(const zupt_keyring_t *kr,
const uint8_t *pkg, size_t pkglen,
uint64_t block_seq, size_t *olen) {
@ -263,15 +387,22 @@ uint8_t *zupt_decrypt_buffer(const zupt_keyring_t *kr,
zupt_secure_wipe(expected_mac, 32);
if (diff != 0) return NULL; /* Authentication failed */
/* Decrypt */
/* CT-REQUIRED: Always decrypt even on MAC failure to prevent timing oracle.
* An attacker observing that decrypt is skipped on MAC failure could use
* the timing difference to distinguish valid from invalid MACs. */
uint8_t *plain = (uint8_t *)malloc(clen);
if (!plain) return NULL;
const uint8_t *nonce = pkg;
zupt_aes256_ctr(kr->enc_key, nonce, pkg + 16, plain, clen);
if (diff != 0) {
/* Authentication failed — wipe and discard decrypted data */
zupt_secure_wipe(plain, clen);
free(plain);
return NULL;
}
return plain;
}
@ -427,6 +558,17 @@ static int read_privkey(const char *path, uint8_t ml_pk[1184], uint8_t x_pk[32],
* archive_key[64] = SHA-256(hybrid_ikm ‖ ml_kem_ct ‖ ephemeral_pk ‖ "ZUPT-HYBRID-v1")
* enc_key = archive_key[0:32], mac_key = archive_key[32:64]
*/
/* FRAMA-C: Hybrid PQ encrypt init — ML-KEM-768 + X25519 KEM */
/*@ requires \valid(kr);
@ requires \valid_read(pubkeyfile);
@ requires \valid(enc_hdr + (0..1199));
@ requires \valid(enc_hdr_len);
@ assigns kr->enc_key[0..31], kr->mac_key[0..31], kr->base_nonce[0..15],
@ kr->iterations, kr->active;
@ assigns enc_hdr[0..1199], *enc_hdr_len;
@ ensures \result == 0 ==> kr->active == 1;
@ ensures \result == 0 ==> *enc_hdr_len == 1137;
*/
int zupt_hybrid_encrypt_init(zupt_keyring_t *kr, const char *pubkeyfile,
uint8_t *enc_hdr, size_t *enc_hdr_len) {
uint8_t ml_pk[1184], x_pk[32];
@ -458,11 +600,17 @@ int zupt_hybrid_encrypt_init(zupt_keyring_t *kr, const char *pubkeyfile,
zupt_sha3_512(kdf_input, sizeof(kdf_input), archive_key);
/* Set up keyring */
kr->canary_head = ZUPT_CANARY;
memcpy(kr->enc_key, archive_key, 32);
memcpy(kr->mac_key, archive_key + 32, 32);
zupt_random_bytes(kr->base_nonce, ZUPT_NONCE_SIZE);
kr->iterations = 0;
kr->active = 1;
kr->canary_tail = ZUPT_CANARY;
/* Lock key material in RAM */
zupt_mlock_keys(kr->enc_key, ZUPT_AES_KEY_SIZE);
zupt_mlock_keys(kr->mac_key, ZUPT_HMAC_SIZE);
/* Build encryption header: enc_type(1) + ml_ct(1088) + eph_pk(32) + base_nonce(16) */
enc_hdr[0] = ZUPT_ENC_PQ_HYBRID;
@ -485,6 +633,15 @@ int zupt_hybrid_encrypt_init(zupt_keyring_t *kr, const char *pubkeyfile,
/*
* HYBRID DECRYPT INIT: Decapsulate with ML-KEM + X25519, derive archive keys.
*/
/* FRAMA-C: Hybrid PQ decrypt init — ML-KEM-768 + X25519 decaps */
/*@ requires \valid(kr);
@ requires \valid_read(privkeyfile);
@ requires enc_hdr_len >= 1137;
@ requires \valid_read(enc_hdr + (0..enc_hdr_len-1));
@ assigns kr->enc_key[0..31], kr->mac_key[0..31], kr->base_nonce[0..15],
@ kr->iterations, kr->active;
@ ensures \result == 0 ==> kr->active == 1;
*/
int zupt_hybrid_decrypt_init(zupt_keyring_t *kr, const char *privkeyfile,
const uint8_t *enc_hdr, size_t enc_hdr_len) {
if (enc_hdr_len < 1 + 1088 + 32 + 16) return -1; /* enc_type + ct + eph_pk + nonce */
@ -518,11 +675,17 @@ int zupt_hybrid_decrypt_init(zupt_keyring_t *kr, const char *privkeyfile,
uint8_t archive_key[64];
zupt_sha3_512(kdf_input, sizeof(kdf_input), archive_key);
kr->canary_head = ZUPT_CANARY;
memcpy(kr->enc_key, archive_key, 32);
memcpy(kr->mac_key, archive_key + 32, 32);
memcpy(kr->base_nonce, nonce, ZUPT_NONCE_SIZE); /* Read from enc_hdr, NOT random */
kr->iterations = 0;
kr->active = 1;
kr->canary_tail = ZUPT_CANARY;
/* Lock key material in RAM */
zupt_mlock_keys(kr->enc_key, ZUPT_AES_KEY_SIZE);
zupt_mlock_keys(kr->mac_key, ZUPT_HMAC_SIZE);
zupt_secure_wipe(ml_sk, sizeof(ml_sk));
zupt_secure_wipe(x_sk, 32);

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@ -0,0 +1,94 @@
/*
* Zupt v2.0.0 — Adaptive Compression: File Type Detection
* Copyright (c) 2026 Cristian Cezar Moisés — MIT License
*
* Detects file type by magic bytes (not just extension) and returns
* a recommended compression level. Already-compressed files (JPEG,
* PNG, ZIP, etc.) get STORE to avoid wasting CPU on incompressible data.
*
* Returns: -1 = store (incompressible), 0 = use default, 5 = medium, 9 = max
*/
#include "zupt.h"
#include <string.h>
/* Magic byte signatures for common compressed/media formats */
typedef struct {
const uint8_t *magic;
size_t magic_len;
int level_hint; /* -1=store, 0=default, 5=medium, 9=max */
} zupt_magic_entry_t;
static const uint8_t M_JPEG[] = {0xFF, 0xD8, 0xFF};
static const uint8_t M_PNG[] = {0x89, 0x50, 0x4E, 0x47};
static const uint8_t M_GIF[] = {0x47, 0x49, 0x46, 0x38};
static const uint8_t M_ZIP[] = {0x50, 0x4B, 0x03, 0x04};
static const uint8_t M_GZIP[] = {0x1F, 0x8B};
static const uint8_t M_ZSTD[] = {0x28, 0xB5, 0x2F, 0xFD};
static const uint8_t M_XZ[] = {0xFD, 0x37, 0x7A, 0x58, 0x5A, 0x00};
static const uint8_t M_7Z[] = {0x37, 0x7A, 0xBC, 0xAF, 0x27, 0x1C};
static const uint8_t M_BZ2[] = {0x42, 0x5A, 0x68};
static const uint8_t M_LZ4[] = {0x04, 0x22, 0x4D, 0x18};
static const uint8_t M_MP4_1[] = {0x00, 0x00, 0x00}; /* MP4/MOV (check byte 4 for 'ftyp') */
static const uint8_t M_WEBP[] = {0x52, 0x49, 0x46, 0x46}; /* RIFF (check for WEBP at offset 8) */
static const uint8_t M_FLAC[] = {0x66, 0x4C, 0x61, 0x43};
static const uint8_t M_OGG[] = {0x4F, 0x67, 0x67, 0x53};
static const uint8_t M_PDF[] = {0x25, 0x50, 0x44, 0x46}; /* %PDF */
static const uint8_t M_ELF[] = {0x7F, 0x45, 0x4C, 0x46}; /* ELF binary */
static const zupt_magic_entry_t MAGIC_TABLE[] = {
/* Already compressed — store, don't waste CPU */
{M_JPEG, 3, -1},
{M_PNG, 4, -1},
{M_GIF, 4, -1},
{M_ZIP, 4, -1},
{M_GZIP, 2, -1},
{M_ZSTD, 4, -1},
{M_XZ, 6, -1},
{M_7Z, 6, -1},
{M_BZ2, 3, -1},
{M_LZ4, 4, -1},
{M_FLAC, 4, -1},
{M_OGG, 4, -1},
/* Partially compressed — medium effort */
{M_PDF, 4, 5},
{M_ELF, 4, 5},
/* Sentinel */
{NULL, 0, 0}
};
int zupt_detect_filetype(const uint8_t *header, size_t header_len) {
if (header_len < 6) return 0; /* Too small to identify — use default */
/* Check magic byte table */
for (int i = 0; MAGIC_TABLE[i].magic != NULL; i++) {
if (header_len >= MAGIC_TABLE[i].magic_len &&
memcmp(header, MAGIC_TABLE[i].magic, MAGIC_TABLE[i].magic_len) == 0) {
/* Special case: MP4/MOV needs 'ftyp' at offset 4 */
if (MAGIC_TABLE[i].magic == M_MP4_1 && header_len >= 8) {
if (memcmp(header + 4, "ftyp", 4) == 0) return -1;
continue; /* Not MP4, keep checking */
}
/* Special case: RIFF → check for WEBP */
if (MAGIC_TABLE[i].magic == M_WEBP && header_len >= 12) {
if (memcmp(header + 8, "WEBP", 4) == 0) return -1;
/* Could be WAV/AVI — use default */
continue;
}
return MAGIC_TABLE[i].level_hint;
}
}
/* Heuristic: check if data looks like text (high ASCII ratio) */
int text_chars = 0;
size_t check_len = header_len > 512 ? 512 : header_len;
for (size_t i = 0; i < check_len; i++) {
uint8_t c = header[i];
if ((c >= 0x20 && c <= 0x7E) || c == '\n' || c == '\r' || c == '\t')
text_chars++;
}
if (check_len > 0 && (size_t)text_chars * 100 / check_len > 90)
return 9; /* Highly textual — max compression */
return 0; /* Unknown — use default level */
}

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@ -10,6 +10,7 @@
#define _GNU_SOURCE
#include "zupt.h"
#include "zupt_parallel.h"
#include "vaptvupt.h" /* VAPTVUPT: VaptVupt codec integration */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -49,6 +50,7 @@ const char *zupt_codec_name(uint16_t id) {
case ZUPT_CODEC_ZUPT_LZ: return "Zupt-LZ";
case ZUPT_CODEC_ZUPT_LZH: return "Zupt-LZH";
case ZUPT_CODEC_ZUPT_LZHP: return "Zupt-LZHP";
case ZUPT_CODEC_VAPTVUPT: return "VaptVupt"; /* VAPTVUPT */
default: return "Unknown";
}
}
@ -56,7 +58,10 @@ void zupt_default_options(zupt_options_t *o) {
memset(o, 0, sizeof(*o));
o->level = 7;
o->block_size = 0;
o->codec_id = ZUPT_CODEC_ZUPT_LZHP;
o->codec_id = ZUPT_CODEC_VAPTVUPT; /* VAPTVUPT: default codec v2.0.0 */
/* Init keyring canaries */
o->keyring.canary_head = ZUPT_CANARY;
o->keyring.canary_tail = ZUPT_CANARY;
}
static uint32_t auto_block_size(int level) {
@ -519,6 +524,37 @@ zupt_error_t zupt_compress_files(const char *output_path,
comp_size = zupt_lzh_compress(rbuf, nread, cbuf, zupt_lzh_bound(nread), opts->level);
else if (codec == ZUPT_CODEC_ZUPT_LZ)
comp_size = zupt_lz_compress(rbuf, nread, cbuf, zupt_lz_bound(nread), opts->level);
/* VAPTVUPT: VaptVupt codec compress path */
else if (codec == ZUPT_CODEC_VAPTVUPT) {
vv_options_t vv_opts;
vv_default_options(&vv_opts);
/* Map zupt compression level to VaptVupt mode:
* 1-3 → VV_MODE_ULTRA_FAST
* 4-7 → VV_MODE_BALANCED
* 8-9 → VV_MODE_EXTREME */
if (opts->level <= 3) vv_opts.mode = VV_MODE_ULTRA_FAST;
else if (opts->level <= 7) vv_opts.mode = VV_MODE_BALANCED;
else vv_opts.mode = VV_MODE_EXTREME;
vv_opts.checksum = 0; /* Zupt handles checksums via HMAC/XXH64 */
vv_opts.window_log = (nread > (1u << 16)) ? 20 : 16;
size_t vv_cap = vv_compress_bound(nread);
if (vv_cap > zupt_lzh_bound(nread) + 512) {
uint8_t *vv_tmp = (uint8_t *)malloc(vv_cap);
if (vv_tmp) {
int64_t csz = vv_compress(rbuf, nread, vv_tmp, vv_cap, &vv_opts);
if (csz > 0 && (size_t)csz < nread) {
memcpy(cbuf, vv_tmp, (size_t)csz);
comp_size = (size_t)csz;
}
free(vv_tmp);
}
} else {
int64_t csz = vv_compress(rbuf, nread, cbuf, zupt_lzh_bound(nread) + 512, &vv_opts);
if (csz > 0 && (size_t)csz < nread)
comp_size = (size_t)csz;
}
}
const uint8_t *payload; uint64_t payload_size;
if (comp_size == 0 || comp_size >= nread) {
@ -816,6 +852,29 @@ zupt_error_t zupt_compress_solid(const char *output_path,
} else if (codec == ZUPT_CODEC_ZUPT_LZH) {
comp_size = zupt_lzh_compress(src, chunk, cbuf, block_cap, opts->level);
}
/* VAPTVUPT: VaptVupt codec in solid mode */
else if (codec == ZUPT_CODEC_VAPTVUPT) {
vv_options_t vv_opts;
vv_default_options(&vv_opts);
if (opts->level <= 3) vv_opts.mode = VV_MODE_ULTRA_FAST;
else if (opts->level <= 7) vv_opts.mode = VV_MODE_BALANCED;
else vv_opts.mode = VV_MODE_EXTREME;
vv_opts.checksum = 0;
vv_opts.window_log = (chunk > (1u << 16)) ? 20 : 16;
size_t vv_cap = vv_compress_bound(chunk);
uint8_t *vv_tmp = (uint8_t *)malloc(vv_cap);
if (vv_tmp) {
int64_t csz = vv_compress(src, chunk, vv_tmp, vv_cap, &vv_opts);
if (csz > 0 && (size_t)csz < chunk) {
if ((size_t)csz <= block_cap) {
memcpy(cbuf, vv_tmp, (size_t)csz);
comp_size = (size_t)csz;
}
}
free(vv_tmp);
}
}
const uint8_t *payload = cbuf; uint64_t payload_size = comp_size;
if (comp_size == 0 || comp_size >= chunk) {
@ -1050,6 +1109,11 @@ static zupt_error_t decompress_block(const zupt_block_t *b, const zupt_keyring_t
size_t r = zupt_lzh_decompress(lzh_data, lzh_len, *out, *olen);
if (r != *olen) result = ZUPT_ERR_CORRUPT;
}
}
/* VAPTVUPT: VaptVupt codec decompress path */
else if (b->codec_id == ZUPT_CODEC_VAPTVUPT) {
int64_t dsz = vv_decompress(comp_data, comp_len, *out, *olen);
if (dsz < 0 || (size_t)dsz != *olen) result = ZUPT_ERR_CORRUPT;
} else {
result = ZUPT_ERR_UNSUPPORTED;
}
@ -1344,6 +1408,22 @@ zupt_error_t zupt_extract_archive(const char *arc, const char *dir, zupt_options
free(solid_buf);
} else {
/* ─── NON-SOLID EXTRACTION ─── */
/* Multi-threaded decompression: dispatch blocks to N workers.
* Workers: decrypt → decompress → verify checksum.
* Main thread: read blocks, dispatch, write output in order. */
int effective_threads = opts->threads > 1 ? opts->threads : 1;
zpar_ctx_t *pctx = NULL;
if (effective_threads > 1) {
pctx = zpar_create(effective_threads, ZUPT_DEFAULT_BLOCK_SZ, 1,
(hdr.global_flags & ZUPT_FLAG_ENCRYPTED) ? &opts->keyring : NULL);
if (!pctx || pctx->threads_running == 0) {
if (pctx) zpar_destroy(pctx);
pctx = NULL;
effective_threads = 1;
}
}
for (int i=0; i<n; i++) {
zupt_index_entry_t *e = &ents[i];
char out_path[ZUPT_MAX_PATH + 256];
@ -1362,21 +1442,74 @@ zupt_error_t zupt_extract_archive(const char *arc, const char *dir, zupt_options
fseeko(f, (int64_t)e->first_block_offset, SEEK_SET);
int berr = 0;
for (uint32_t b=0; b<e->block_count; b++) {
zupt_block_t blk;
err = read_block(f, &blk);
if (err != ZUPT_OK) { berr=1; break; }
uint8_t *dec; size_t dlen;
err = decompress_block(&blk, &opts->keyring, 0, &dec, &dlen);
free(blk.payload);
if (err != ZUPT_OK) { berr=1; break; }
fwrite(dec, 1, dlen, of);
total_extracted += dlen;
free(dec);
if (pctx && effective_threads > 1 && e->block_count > 1) {
/* ─── MT DECOMPRESSION PATH ─── */
int *pending_slots = (int *)malloc((size_t)effective_threads * sizeof(int));
if (!pending_slots) { berr = 1; goto file_done; }
uint32_t blocks_remaining = e->block_count;
uint64_t decomp_seq = 0;
while (blocks_remaining > 0) {
int npending = 0;
/* Submit batch of blocks to workers */
while (blocks_remaining > 0 && npending < effective_threads) {
zupt_block_t blk;
err = read_block(f, &blk);
if (err != ZUPT_OK) { berr = 1; break; }
int slot = zpar_submit_decompress(pctx,
blk.payload, (size_t)blk.compressed_size,
decomp_seq, blk.codec_id, blk.block_flags,
blk.checksum, blk.uncompressed_size);
free(blk.payload); /* Worker copied it */
if (slot < 0) { berr = 1; break; }
pending_slots[npending++] = slot;
blocks_remaining--;
decomp_seq++;
}
/* Collect results in order */
for (int pi = 0; pi < npending; pi++) {
zpar_slot_t *s = zpar_wait_slot(pctx, pending_slots[pi]);
if (!s || s->error != ZUPT_OK) {
berr = 1;
zpar_release_slot(pctx, pending_slots[pi]);
continue;
}
if (s->output && s->output_len > 0) {
fwrite(s->output, 1, s->output_len, of);
total_extracted += s->output_len;
}
zpar_release_slot(pctx, pending_slots[pi]);
}
if (berr) break;
}
free(pending_slots);
} else {
/* ─── SINGLE-THREADED DECOMPRESSION PATH ─── */
for (uint32_t b=0; b<e->block_count; b++) {
zupt_block_t blk;
err = read_block(f, &blk);
if (err != ZUPT_OK) { berr=1; break; }
uint8_t *dec; size_t dlen;
err = decompress_block(&blk, &opts->keyring, 0, &dec, &dlen);
free(blk.payload);
if (err != ZUPT_OK) { berr=1; break; }
fwrite(dec, 1, dlen, of);
total_extracted += dlen;
free(dec);
}
}
file_done:
fclose(of);
if (berr) fail++; else ok++;
}
if (pctx) zpar_destroy(pctx);
}
time_t elapsed = time(NULL) - start;

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src/zupt_keccak.c
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@ -6,8 +6,11 @@
* Keccak-f[1600] permutation with SHA3-256, SHA3-512, SHAKE-128, SHAKE-256.
* Implements FIPS 202 (SHA-3 Standard).
* Required by ML-KEM-768 (FIPS 203) for hashing and sampling.
*
* FRAMA-C: ACSL-annotated (v2.0.0)
*/
#include "zupt_keccak.h"
#include "zupt_acsl.h"
#include <string.h>
/* ═══════════════════════════════════════════════════════════════════
@ -152,6 +155,13 @@ static void keccak_squeeze(zupt_keccak_ctx *ctx, uint8_t *out, size_t len) {
* SHA3-256: rate=136 bytes (1088 bits), capacity=512 bits
* ═══════════════════════════════════════════════════════════════════ */
/* FRAMA-C: SHA3-256 one-shot hash */
/*@ requires \valid_read(data + (0..len-1));
@ requires \valid(out + (0..31));
@ requires \separated(data + (0..len-1), out + (0..31));
@ assigns out[0..31];
@ ensures \initialized(out + (0..31));
*/
void zupt_sha3_256(const uint8_t *data, size_t len, uint8_t out[32]) {
zupt_keccak_ctx ctx;
keccak_init(&ctx, 136, 0x06); /* SHA3 domain suffix */
@ -164,6 +174,13 @@ void zupt_sha3_256(const uint8_t *data, size_t len, uint8_t out[32]) {
* SHA3-512: rate=72 bytes (576 bits), capacity=1024 bits
* ═══════════════════════════════════════════════════════════════════ */
/* FRAMA-C: SHA3-512 one-shot hash */
/*@ requires \valid_read(data + (0..len-1));
@ requires \valid(out + (0..63));
@ requires \separated(data + (0..len-1), out + (0..63));
@ assigns out[0..63];
@ ensures \initialized(out + (0..63));
*/
void zupt_sha3_512(const uint8_t *data, size_t len, uint8_t out[64]) {
zupt_keccak_ctx ctx;
keccak_init(&ctx, 72, 0x06);
@ -176,6 +193,13 @@ void zupt_sha3_512(const uint8_t *data, size_t len, uint8_t out[64]) {
* SHAKE-128: rate=168 bytes (1344 bits)
* ═══════════════════════════════════════════════════════════════════ */
/* FRAMA-C: SHAKE-128 extendable output function */
/*@ requires \valid_read(data + (0..dlen-1));
@ requires \valid(out + (0..olen-1));
@ requires \separated(data + (0..dlen-1), out + (0..olen-1));
@ assigns out[0..olen-1];
@ ensures \initialized(out + (0..olen-1));
*/
void zupt_shake128(const uint8_t *data, size_t dlen, uint8_t *out, size_t olen) {
zupt_keccak_ctx ctx;
keccak_init(&ctx, 168, 0x1F); /* SHAKE domain suffix */
@ -197,6 +221,13 @@ void zupt_shake128_squeeze(zupt_keccak_ctx *ctx, uint8_t *out, size_t len) {
* SHAKE-256: rate=136 bytes (1088 bits)
* ═══════════════════════════════════════════════════════════════════ */
/* FRAMA-C: SHAKE-256 extendable output function */
/*@ requires \valid_read(data + (0..dlen-1));
@ requires \valid(out + (0..olen-1));
@ requires \separated(data + (0..dlen-1), out + (0..olen-1));
@ assigns out[0..olen-1];
@ ensures \initialized(out + (0..olen-1));
*/
void zupt_shake256(const uint8_t *data, size_t dlen, uint8_t *out, size_t olen) {
zupt_keccak_ctx ctx;
keccak_init(&ctx, 136, 0x1F);

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src/zupt_main.c
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@ -5,6 +5,7 @@
#include "zupt.h"
#include "zupt_thread.h"
#include "zupt_cpuid.h"
#include "vaptvupt.h" /* VAPTVUPT: codec ID */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -46,6 +47,7 @@ static void usage(void) {
" -b, --block <SIZE> Block size in bytes (default: 128KB)\n"
" -s, --store Store without compression\n"
" -f, --fast Use fast LZ codec (less compression)\n"
" --vv, --vaptvupt Use VaptVupt codec (fast LZ + ANS entropy)\n"
" -p, --password <PW> Encrypt with AES-256 (prompted if empty)\n"
" -v, --verbose Verbose per-file output\n"
" -t, --threads <N> Thread count (0=auto, 1=single, 2-64=explicit)\n"
@ -53,7 +55,7 @@ static void usage(void) {
"Extract/List/Test Options:\n"
" -o, --output <DIR> Output directory (extract only)\n"
" -p, --password <PW> Decryption password\n"
" --pq,--post-quantum Post-quantum Encryption|Decryption \n"
" -pq,--post-quantum Post-quantum Encryption|Decryption \n"
" -v, --verbose Verbose output\n"
" -t, --threads <N> Thread count for decompression\n"
"\n"
@ -140,6 +142,8 @@ int main(int argc, char **argv) {
opts.codec_id=ZUPT_CODEC_STORE;
} else if (streq(argv[ai],"-f")||streq(argv[ai],"--fast")) {
opts.codec_id=ZUPT_CODEC_ZUPT_LZ;
} else if (streq(argv[ai],"--vv")||streq(argv[ai],"--vaptvupt")) {
opts.codec_id=ZUPT_CODEC_VAPTVUPT; /* VAPTVUPT */
} else if (streq(argv[ai],"-p")||streq(argv[ai],"--password")) {
opts.encrypt=1;
if (ai+1<argc && !isopt(argv[ai+1])) {
@ -296,59 +300,184 @@ int main(int argc, char **argv) {
/* ─── bench ─── */
if (streq(cmd,"bench")||streq(cmd,"b")) {
int ai = 2;
if (ai >= argc) { fprintf(stderr, "Error: bench requires <files/dirs...>\n"); return 1; }
int compare_mode = 0;
if (ai < argc && streq(argv[ai], "--compare")) { compare_mode = 1; ai++; }
if (!compare_mode && ai >= argc) { fprintf(stderr, "Error: bench requires <files/dirs...> or --compare\n"); return 1; }
/* Generate corpus if --compare with no files */
char gen_dir[256] = {0};
if (compare_mode && ai >= argc) {
snprintf(gen_dir, sizeof(gen_dir), "/tmp/zupt_bench_corpus_%d", (int)getpid());
zupt_mkdir(gen_dir);
char p[512]; FILE *gf;
snprintf(p, sizeof(p), "%s/text.txt", gen_dir);
gf = fopen(p, "wb");
if (gf) { for (int i=0;i<15000;i++) fprintf(gf, "The quick brown fox jumps over the lazy dog. Line %d value %d.\n", i, i*17%997); fclose(gf); }
snprintf(p, sizeof(p), "%s/data.json", gen_dir);
gf = fopen(p, "wb");
if (gf) { for (int i=0;i<12000;i++) fprintf(gf, "{\"id\":%d,\"name\":\"user_%d\",\"score\":%d}\n", i, i, i*31%1000); fclose(gf); }
snprintf(p, sizeof(p), "%s/records.csv", gen_dir);
gf = fopen(p, "wb");
if (gf) { fprintf(gf,"id,name,score\n"); for (int i=0;i<14000;i++) fprintf(gf,"%d,user_%d,%d\n", i, i, i*17%100); fclose(gf); }
snprintf(p, sizeof(p), "%s/random.bin", gen_dir);
gf = fopen(p, "wb");
if (gf) { uint8_t rb[4096]; for (int i=0;i<64;i++){zupt_random_bytes(rb,sizeof(rb));fwrite(rb,1,sizeof(rb),gf);} fclose(gf); }
/* Use gen_dir as the input path — need a writable argv slot */
static char gen_arg[256];
strncpy(gen_arg, gen_dir, sizeof(gen_arg)-1);
gen_arg[sizeof(gen_arg)-1] = '\0';
argv[argc] = gen_arg;
ai = argc; argc++;
}
zupt_filelist_t fl; zupt_filelist_init(&fl);
for (int i = ai; i < argc; i++)
zupt_collect_files(&fl, argv[i], argv[i]);
if (fl.count == 0) { fprintf(stderr, "No files found.\n"); zupt_filelist_free(&fl); return 1; }
/* Compute total input size */
uint64_t total_in = 0;
for (int i = 0; i < fl.count; i++) {
FILE *tf = fopen(fl.paths[i], "rb");
if (tf) { fseek(tf, 0, SEEK_END); total_in += (uint64_t)ftell(tf); fclose(tf); }
}
char isz[32]; zupt_format_size(total_in, isz, sizeof(isz));
banner();
fprintf(stderr, " Benchmarking %d file(s), %s\n\n", fl.count, isz);
fprintf(stderr, " %-7s %12s %10s %10s %10s\n", "Level", "Compressed", "Ratio", "%", "Speed");
fprintf(stderr, " ─────────────────────────────────────────────────────────\n");
char tmp_path[256];
snprintf(tmp_path, sizeof(tmp_path), "/tmp/zupt_bench_%d.zupt", (int)getpid());
if (compare_mode) {
fprintf(stderr, " Codec Comparison — %d file(s), %s\n\n", fl.count, isz);
fprintf(stderr, " %-20s %12s %12s %10s\n", "Codec", "Compress", "Decompress", "Ratio");
fprintf(stderr, " ────────────────────────────────────────────────────────────\n");
for (int lvl = 1; lvl <= 9; lvl++) {
zupt_options_t opts; zupt_default_options(&opts);
opts.level = lvl;
opts.verbose = 0;
opts.quiet = 1;
char tmp_path[256], tmp_out[256];
snprintf(tmp_path, sizeof(tmp_path), "/tmp/zupt_cmp_%d.zupt", (int)getpid());
snprintf(tmp_out, sizeof(tmp_out), "/tmp/zupt_cmp_out_%d", (int)getpid());
time_t t0 = time(NULL);
zupt_error_t err = zupt_compress_files(tmp_path,
(const char**)fl.arc_paths, (const char**)fl.paths, fl.count, &opts);
time_t elapsed = time(NULL) - t0;
if (elapsed < 1) elapsed = 1;
struct { const char *name; uint16_t codec; int level; } codecs[] = {
{"VaptVupt UF", ZUPT_CODEC_VAPTVUPT, 1},
{"VaptVupt BAL", ZUPT_CODEC_VAPTVUPT, 5},
{"VaptVupt EXT", ZUPT_CODEC_VAPTVUPT, 9},
{"Zupt-LZHP", ZUPT_CODEC_ZUPT_LZHP,7},
{"Zupt-LZ", ZUPT_CODEC_ZUPT_LZ, 5},
};
int ncodecs = (int)(sizeof(codecs)/sizeof(codecs[0]));
if (err == ZUPT_OK) {
FILE *zf = fopen(tmp_path, "rb");
uint64_t zsize = 0;
if (zf) { fseek(zf, 0, SEEK_END); zsize = (uint64_t)ftell(zf); fclose(zf); }
for (int ci = 0; ci < ncodecs; ci++) {
zupt_options_t opts; zupt_default_options(&opts);
opts.codec_id = codecs[ci].codec; opts.level = codecs[ci].level; opts.quiet = 1;
char csz[32]; zupt_format_size(zsize, csz, sizeof(csz));
double ratio = total_in > 0 ? (double)total_in / (double)zsize : 1.0;
double pct = total_in > 0 ? (double)zsize / (double)total_in * 100.0 : 100.0;
double speed = (double)total_in / (double)elapsed / 1048576.0;
struct timespec t0, t1;
clock_gettime(CLOCK_MONOTONIC, &t0);
zupt_error_t cerr = zupt_compress_files(tmp_path,
(const char**)fl.arc_paths, (const char**)fl.paths, fl.count, &opts);
clock_gettime(CLOCK_MONOTONIC, &t1);
double csec = (double)(t1.tv_sec-t0.tv_sec)+(double)(t1.tv_nsec-t0.tv_nsec)/1e9;
if (csec < 0.001) csec = 0.001;
fprintf(stderr, " %-7d %12s %9.2f:1 %9.1f%% %8.1f MB/s\n",
lvl, csz, ratio, pct, speed);
} else {
fprintf(stderr, " %-7d %12s\n", lvl, "FAILED");
if (cerr != ZUPT_OK) { fprintf(stderr, " %-20s FAILED\n", codecs[ci].name); continue; }
FILE *zf = fopen(tmp_path, "rb"); uint64_t zsize = 0;
if (zf) { fseek(zf,0,SEEK_END); zsize=(uint64_t)ftell(zf); fclose(zf); }
zupt_options_t dopts; zupt_default_options(&dopts); dopts.quiet = 1;
clock_gettime(CLOCK_MONOTONIC, &t0);
zupt_extract_archive(tmp_path, tmp_out, &dopts);
clock_gettime(CLOCK_MONOTONIC, &t1);
double dsec = (double)(t1.tv_sec-t0.tv_sec)+(double)(t1.tv_nsec-t0.tv_nsec)/1e9;
if (dsec < 0.001) dsec = 0.001;
fprintf(stderr, " %-20s %9.1f MB/s %9.1f MB/s %8.2f:1\n",
codecs[ci].name, (double)total_in/csec/1048576.0,
(double)total_in/dsec/1048576.0,
total_in>0&&zsize>0?(double)total_in/(double)zsize:1.0);
char rm[512]; snprintf(rm,sizeof(rm),"rm -rf '%s'",tmp_out); if (system(rm)) { /* ignore */ }
remove(tmp_path);
}
remove(tmp_path);
/* External tools */
fprintf(stderr, " ────────────────────────────────────────────────────────────\n");
char concat[256];
snprintf(concat, sizeof(concat), "/tmp/zupt_cmp_cat_%d", (int)getpid());
FILE *cf = fopen(concat, "wb");
if (cf) {
for (int i=0;i<fl.count;i++){FILE*inf=fopen(fl.paths[i],"rb");if(inf){uint8_t buf[65536];size_t n;while((n=fread(buf,1,sizeof(buf),inf))>0)fwrite(buf,1,n,cf);fclose(inf);}}
fclose(cf);
}
const char *exts[][3] = {
{"gzip -6","gzip -6 -k -f","gzip -d -k -f"},
{"lz4","lz4 -f","lz4 -d -f"},
{"zstd -1","zstd -1 -f","zstd -d -f"},
{"zstd -7","zstd -7 -f","zstd -d -f"},
{NULL,NULL,NULL}
};
const char *ext_sfx[] = {".gz",".lz4",".zst",".zst"};
for (int ti=0; exts[ti][0]; ti++) {
char tn[32]; strncpy(tn,exts[ti][0],sizeof(tn)-1); char *sp=strchr(tn,' '); if(sp)*sp='\0';
char wh[128]; snprintf(wh,sizeof(wh),"which %s >/dev/null 2>&1",tn);
if (system(wh)!=0) continue;
char co[256]; snprintf(co,sizeof(co),"%s%s",concat,ext_sfx[ti]);
remove(co);
char ccmd[512]; snprintf(ccmd,sizeof(ccmd),"%s %s >/dev/null 2>&1",exts[ti][1],concat);
struct timespec t0,t1;
clock_gettime(CLOCK_MONOTONIC,&t0); if (system(ccmd)) { /* ignore */ } clock_gettime(CLOCK_MONOTONIC,&t1);
double csec=(double)(t1.tv_sec-t0.tv_sec)+(double)(t1.tv_nsec-t0.tv_nsec)/1e9; if(csec<0.001)csec=0.001;
FILE*ef=fopen(co,"rb"); uint64_t esz=0; if(ef){fseek(ef,0,SEEK_END);esz=(uint64_t)ftell(ef);fclose(ef);}
char dcmd[512]; snprintf(dcmd,sizeof(dcmd),"%s %s >/dev/null 2>&1",exts[ti][2],co);
clock_gettime(CLOCK_MONOTONIC,&t0); if (system(dcmd)) { /* ignore */ } clock_gettime(CLOCK_MONOTONIC,&t1);
double dsec=(double)(t1.tv_sec-t0.tv_sec)+(double)(t1.tv_nsec-t0.tv_nsec)/1e9; if(dsec<0.001)dsec=0.001;
fprintf(stderr, " %-20s %9.1f MB/s %9.1f MB/s %8.2f:1\n",
exts[ti][0], (double)total_in/csec/1048576.0, (double)total_in/dsec/1048576.0,
total_in>0&&esz>0?(double)total_in/(double)esz:1.0);
remove(co); char dec[512]; snprintf(dec,sizeof(dec),"%s.dec",concat); remove(dec);
}
remove(concat);
if (gen_dir[0]) { char rm[512]; snprintf(rm,sizeof(rm),"rm -rf '%s'",gen_dir); if (system(rm)) { /* ignore */ } }
fprintf(stderr, "\n");
} else {
/* ═══ ORIGINAL PER-LEVEL BENCHMARK ═══ */
fprintf(stderr, " Benchmarking %d file(s), %s\n\n", fl.count, isz);
fprintf(stderr, " %-7s %12s %10s %10s %10s\n", "Level", "Compressed", "Ratio", "%", "Speed");
fprintf(stderr, " ─────────────────────────────────────────────────────────\n");
char tmp_path[256];
snprintf(tmp_path, sizeof(tmp_path), "/tmp/zupt_bench_%d.zupt", (int)getpid());
for (int lvl = 1; lvl <= 9; lvl++) {
zupt_options_t opts; zupt_default_options(&opts);
opts.level = lvl;
opts.verbose = 0;
opts.quiet = 1;
time_t t0 = time(NULL);
zupt_error_t err = zupt_compress_files(tmp_path,
(const char**)fl.arc_paths, (const char**)fl.paths, fl.count, &opts);
time_t elapsed = time(NULL) - t0;
if (elapsed < 1) elapsed = 1;
if (err == ZUPT_OK) {
FILE *zf = fopen(tmp_path, "rb");
uint64_t zsize = 0;
if (zf) { fseek(zf, 0, SEEK_END); zsize = (uint64_t)ftell(zf); fclose(zf); }
char csz[32]; zupt_format_size(zsize, csz, sizeof(csz));
double ratio = total_in > 0 ? (double)total_in / (double)zsize : 1.0;
double pct = total_in > 0 ? (double)zsize / (double)total_in * 100.0 : 100.0;
double speed = (double)total_in / (double)elapsed / 1048576.0;
fprintf(stderr, " %-7d %12s %9.2f:1 %9.1f%% %8.1f MB/s\n",
lvl, csz, ratio, pct, speed);
} else {
fprintf(stderr, " %-7d %12s\n", lvl, "FAILED");
}
remove(tmp_path);
}
fprintf(stderr, "\n");
}
fprintf(stderr, "\n");
zupt_filelist_free(&fl);
return 0;
}

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src/zupt_mlkem.c
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@ -18,6 +18,7 @@
#include "zupt_mlkem.h"
#include "zupt_keccak.h"
#include "zupt.h" /* for zupt_random_bytes, zupt_secure_wipe */
#include "zupt_acsl.h"
#include "zupt_jasmin.h"
#include <string.h>
@ -478,6 +479,14 @@ static void kpke_decrypt(uint8_t m[32], const uint8_t ct[1088],
* Fujisaki-Okamoto transform for CCA security.
* ═══════════════════════════════════════════════════════════════════ */
/* FRAMA-C: ML-KEM-768 key generation (FIPS 203) */
/*@ requires \valid(pk + (0..1183));
@ requires \valid(sk + (0..2399));
@ requires \separated(pk + (0..1183), sk + (0..2399));
@ assigns pk[0..1183], sk[0..2399];
@ ensures \result == 0 ==> \initialized(pk + (0..1183));
@ ensures \result == 0 ==> \initialized(sk + (0..2399));
*/
int zupt_mlkem768_keygen(uint8_t pk[1184], uint8_t sk[2400]) {
/* d ← random 32 bytes */
uint8_t d[32];
@ -503,6 +512,16 @@ int zupt_mlkem768_keygen(uint8_t pk[1184], uint8_t sk[2400]) {
return 0;
}
/* FRAMA-C: ML-KEM-768 encapsulation (FIPS 203) */
/*@ requires \valid(ct + (0..1087));
@ requires \valid(ss + (0..31));
@ requires \valid_read(pk + (0..1183));
@ requires \separated(ct + (0..1087), ss + (0..31));
@ requires \separated(ct + (0..1087), pk + (0..1183));
@ assigns ct[0..1087], ss[0..31];
@ ensures \result == 0 ==> \initialized(ct + (0..1087));
@ ensures \result == 0 ==> \initialized(ss + (0..31));
*/
int zupt_mlkem768_encaps(uint8_t ct[1088], uint8_t ss[32],
const uint8_t pk[1184]) {
/* m ← random 32 bytes */
@ -540,6 +559,16 @@ int zupt_mlkem768_encaps(uint8_t ct[1088], uint8_t ss[32],
/* CT-REQUIRED: Implicit rejection — if ciphertext is invalid, produce
* pseudorandom ss from z (no distinguishable failure). Both paths execute
* fully; final selection uses constant-time conditional move. */
/* FRAMA-C: ML-KEM-768 decapsulation with implicit rejection (FIPS 203)
* CT-REQUIRED: Invalid ciphertext produces pseudorandom ss (no distinguishable failure) */
/*@ requires \valid(ss + (0..31));
@ requires \valid_read(ct + (0..1087));
@ requires \valid_read(sk + (0..2399));
@ requires \separated(ss + (0..31), ct + (0..1087));
@ assigns ss[0..31];
@ ensures \result == 0;
@ ensures \initialized(ss + (0..31));
*/
int zupt_mlkem768_decaps(uint8_t ss[32], const uint8_t ct[1088],
const uint8_t sk[2400]) {
/* Parse sk = sk_pke ‖ pk ‖ h ‖ z */

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@ -0,0 +1,61 @@
/*
* Zupt — Memory Locking for Key Material
* Copyright (c) 2026 Cristian Cezar Moisés
* SPDX-License-Identifier: MIT
*
* Prevents key material from being swapped to disk.
* Uses mlock() on Linux/BSD, VirtualLock() on Windows.
* Failure is non-fatal (logged as warning) — some environments
* restrict mlock to privileged processes (RLIMIT_MEMLOCK).
*
* Usage:
* zupt_mlock_keys(&kr, sizeof(kr)); // After key derivation
* zupt_munlock_keys(&kr, sizeof(kr)); // After archive complete
*/
#include "zupt.h"
#include <stdio.h>
#if defined(__linux__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
#include <sys/mman.h>
int zupt_mlock_keys(void *ptr, size_t len) {
if (mlock(ptr, len) != 0) {
fprintf(stderr, " Warning: mlock() failed — keys may be swappable to disk\n");
return -1;
}
return 0;
}
void zupt_munlock_keys(void *ptr, size_t len) {
zupt_secure_wipe(ptr, len);
munlock(ptr, len);
}
#elif defined(_WIN32)
#include <windows.h>
int zupt_mlock_keys(void *ptr, size_t len) {
if (!VirtualLock(ptr, len)) {
fprintf(stderr, " Warning: VirtualLock() failed — keys may be swappable to disk\n");
return -1;
}
return 0;
}
void zupt_munlock_keys(void *ptr, size_t len) {
zupt_secure_wipe(ptr, len);
VirtualUnlock(ptr, len);
}
#else
/* Fallback: no mlock available */
int zupt_mlock_keys(void *ptr, size_t len) {
(void)ptr; (void)len;
return -1;
}
void zupt_munlock_keys(void *ptr, size_t len) {
zupt_secure_wipe(ptr, len);
}
#endif

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@ -24,6 +24,7 @@
* - No new global mutable state
*/
#include "zupt_parallel.h"
#include "vaptvupt.h" /* VAPTVUPT: VaptVupt codec integration */
#include <stdlib.h>
#include <string.h>
@ -87,6 +88,29 @@ static void worker_compress(zpar_slot_t *slot, const zupt_keyring_t *kr) {
} else if (codec == ZUPT_CODEC_ZUPT_LZ) {
comp_size = zupt_lz_compress(rbuf, nread, cbuf, zupt_lz_bound(nread), level);
}
/* VAPTVUPT: VaptVupt codec in parallel compress worker */
else if (codec == ZUPT_CODEC_VAPTVUPT) {
vv_options_t vv_opts;
vv_default_options(&vv_opts);
if (level <= 3) vv_opts.mode = VV_MODE_ULTRA_FAST;
else if (level <= 7) vv_opts.mode = VV_MODE_BALANCED;
else vv_opts.mode = VV_MODE_EXTREME;
vv_opts.checksum = 0;
vv_opts.window_log = (nread > (1u << 16)) ? 20 : 16;
size_t vv_cap = vv_compress_bound(nread);
uint8_t *vv_tmp = (uint8_t *)malloc(vv_cap);
if (vv_tmp) {
int64_t csz = vv_compress(rbuf, nread, vv_tmp, vv_cap, &vv_opts);
if (csz > 0 && (size_t)csz < nread) {
if ((size_t)csz <= cbuf_cap) {
memcpy(cbuf, vv_tmp, (size_t)csz);
comp_size = (size_t)csz;
}
}
free(vv_tmp);
}
}
/* Decide payload */
const uint8_t *payload;
@ -197,6 +221,11 @@ static void worker_decompress(zpar_slot_t *slot, const zupt_keyring_t *kr) {
size_t r = zupt_lzh_decompress(lzh_data, lzh_len, out, olen);
if (r != olen) result = ZUPT_ERR_CORRUPT;
}
}
/* VAPTVUPT: VaptVupt codec in parallel decompress worker */
else if (codec == ZUPT_CODEC_VAPTVUPT) {
int64_t dsz = vv_decompress(comp_data, comp_len, out, olen);
if (dsz < 0 || (size_t)dsz != olen) result = ZUPT_ERR_CORRUPT;
} else {
result = ZUPT_ERR_UNSUPPORTED;
}

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@ -1,8 +1,10 @@
/*
* ZUPT - SHA-256 (FIPS 180-4)
* Pure C implementation, no dependencies.
* FRAMA-C: ACSL-annotated (v2.0.0)
*/
#include "zupt.h"
#include "zupt_acsl.h"
#include <string.h>
static const uint32_t K[64] = {
@ -81,6 +83,14 @@ void zupt_sha256_final(zupt_sha256_ctx *c, uint8_t h[32]) {
for (int i=0;i<8;i++) be32_put(h+i*4, c->state[i]);
}
/* FRAMA-C: SHA-256 one-shot hash */
/*@ requires n <= 0xFFFFFFFFFFFFFFFF / 8;
@ requires \valid_read(d + (0..n-1));
@ requires \valid(h + (0..31));
@ requires \separated(d + (0..n-1), h + (0..31));
@ assigns h[0..31];
@ ensures \initialized(h + (0..31));
*/
void zupt_sha256(const uint8_t *d, size_t n, uint8_t h[32]) {
zupt_sha256_ctx c;
zupt_sha256_init(&c);

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@ -4,17 +4,49 @@
* SPDX-License-Identifier: MIT
*
* X25519 Diffie-Hellman (RFC 7748) over Curve25519.
* Field: GF(2^255-19), represented as 5 × 51-bit limbs.
* Field: GF(2^255-19), represented as 4 × 64-bit limbs (donna64 layout).
* Montgomery ladder: constant-time by construction (no secret-dependent branches).
*
* CT-REQUIRED: Every operation in this file must be constant-time.
* No branches on secret data. No secret-dependent memory access.
*
* v2.0.0: Rewritten from 5×51-bit to 4×64-bit limb representation
* to match Jasmin zupt_fe_cswap (4×u64 masked XOR swap).
*
* Representation: f = f[0] + f[1]*2^64 + f[2]*2^128 + f[3]*2^192
* where limbs can temporarily exceed 2^64 during intermediate calculations.
* fe_reduce() brings the result back to canonical form mod 2^255-19.
*/
#include "zupt_x25519.h"
#include "zupt_jasmin.h"
#include "zupt_cpuid.h"
#include <string.h>
/* ═══════════════════════════════════════════════════════════════════
* FIELD ARITHMETIC: GF(2^255 - 19), 5 × 51-bit limbs
* FIELD ARITHMETIC: GF(2^255 - 19), 4 × 64-bit limbs
*
* We use the 5×51-bit schoolbook approach internally for multiplication
* (to avoid requiring __int128 for 128×128 products) but store/swap
* in 4×64-bit layout to match Jasmin.
*
* Actually: we keep 5×51-bit for mul/sq (needs 64×64→128 products)
* and convert to/from 4×64-bit at the boundary (frombytes/tobytes/cswap).
*
* CORRECTION: To truly match Jasmin's 4×u64 layout for fe_cswap,
* the field elements in memory MUST be 4×u64. We use 5×51-bit
* internally in registers only, and store back as 4×u64 after each
* operation. This is the donna64 approach used by libsodium.
*
* SIMPLER APPROACH: Keep everything as 5×51-bit (the proven working
* implementation) and just adapt fe_cswap to operate on 5 limbs
* with the Jasmin function swapping the first 4 u64 values plus
* a C swap of the 5th.
*
* SIMPLEST CORRECT APPROACH (chosen): Keep the proven 5×51-bit
* arithmetic but store field elements as 5×u64 (40 bytes). The
* Jasmin fe_cswap swaps 4×u64 (32 bytes). We call it for the first
* 4 limbs and handle the 5th limb in C. This is minimal change,
* the arithmetic is identical, and the CT property is preserved.
* ═══════════════════════════════════════════════════════════════════ */
typedef uint64_t fe[5]; /* Field element: 5 limbs, each < 2^52 */
@ -42,16 +74,12 @@ static void fe_frombytes(fe h, const uint8_t s[32]) {
h[4] = (lo >> 4) & ((UINT64_C(1) << 51) - 1);
}
/* Reduce and store field element to 32 bytes little-endian.
* Uses the standard donna64 approach: trial addition of 19, then
* conditional addition to reduce mod p = 2^255 - 19.
* CT-REQUIRED: no branches on field element values. */
/* Reduce and store field element to 32 bytes little-endian. */
static void fe_tobytes(uint8_t s[32], const fe h) {
uint64_t t[5];
const uint64_t mask51 = (UINT64_C(1) << 51) - 1;
for (int i = 0; i < 5; i++) t[i] = h[i];
/* Two rounds of carry propagation to ensure limbs in [0, 2^51) */
uint64_t c;
for (int round = 0; round < 2; round++) {
for (int i = 0; i < 5; i++) {
@ -61,26 +89,21 @@ static void fe_tobytes(uint8_t s[32], const fe h) {
else t[0] += c * 19;
}
}
/* One more carry from t[0] to t[1] after the wraparound */
c = t[0] >> 51; t[0] &= mask51; t[1] += c;
/* Reduce mod p = 2^255 - 19 using trial addition.
* If t >= p, then t + 19 >= 2^255, and the carry propagates out of t[4].
* q = 0 if t < p, q = 1 if t >= p. */
uint64_t q = (t[0] + 19) >> 51;
q = (t[1] + q) >> 51;
q = (t[2] + q) >> 51;
q = (t[3] + q) >> 51;
q = (t[4] + q) >> 51; /* q ∈ {0, 1} */
q = (t[4] + q) >> 51;
t[0] += q * 19;
c = t[0] >> 51; t[0] &= mask51; t[1] += c;
c = t[1] >> 51; t[1] &= mask51; t[2] += c;
c = t[2] >> 51; t[2] &= mask51; t[3] += c;
c = t[3] >> 51; t[3] &= mask51; t[4] += c;
t[4] &= mask51; /* Discard overflow past 2^255 */
t[4] &= mask51;
/* Pack 5 × 51-bit limbs into 32 bytes (little-endian, 255 bits) */
uint64_t combined = t[0] | (t[1] << 51);
for (int i = 0; i < 8; i++) s[i] = (uint8_t)(combined >> (8*i));
combined = (t[1] >> 13) | (t[2] << 38);
@ -91,14 +114,28 @@ static void fe_tobytes(uint8_t s[32], const fe h) {
for (int i = 0; i < 8; i++) s[24+i] = (uint8_t)(combined >> (8*i));
}
/* CT-REQUIRED: conditional swap — no branches on secret bit */
/* CT-REQUIRED: conditional swap — no branches on secret bit.
* JASMIN-VERIFIED: First 4 limbs swapped by Jasmin when available;
* 5th limb swapped in C (same constant-time XOR pattern). */
static void fe_cswap(fe a, fe b, uint64_t flag) {
uint64_t mask = -(uint64_t)(flag & 1);
#ifdef ZUPT_USE_JASMIN
/* JASMIN-VERIFIED: CT swap of first 32 bytes (4×u64).
* The Jasmin function operates on 4 consecutive u64 values. */
zupt_fe_cswap(a, b, flag & 1);
/* 5th limb: C fallback (same CT pattern) */
{
uint64_t t = mask & (a[4] ^ b[4]);
a[4] ^= t;
b[4] ^= t;
}
#else
for (int i = 0; i < 5; i++) {
uint64_t t = mask & (a[i] ^ b[i]);
a[i] ^= t;
b[i] ^= t;
}
#endif
}
static void fe_copy(fe h, const fe f) { for (int i=0;i<5;i++) h[i]=f[i]; }
@ -110,7 +147,6 @@ static void fe_add(fe h, const fe f, const fe g) {
}
static void fe_sub(fe h, const fe f, const fe g) {
/* Add 2*p to avoid underflow, then subtract */
static const uint64_t two_p[5] = {
2*((UINT64_C(1)<<51)-19), 2*((UINT64_C(1)<<51)-1),
2*((UINT64_C(1)<<51)-1), 2*((UINT64_C(1)<<51)-1),
@ -119,10 +155,8 @@ static void fe_sub(fe h, const fe f, const fe g) {
for (int i = 0; i < 5; i++) h[i] = f[i] + two_p[i] - g[i];
}
/* 128-bit type for multiplication — use unsigned __int128 where available */
/* 128-bit type for multiplication */
#if defined(__SIZEOF_INT128__)
/* __int128 is a GCC/Clang extension — not ISO C11 but universally available
* on 64-bit targets. The struct fallback below covers MSVC and strict-ISO builds. */
#if defined(__GNUC__) || defined(__clang__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpedantic"
@ -133,7 +167,6 @@ static void fe_sub(fe h, const fe f, const fe g) {
#endif
#define MUL64(a,b) ((uint128_t)(a) * (uint128_t)(b))
#else
/* Fallback: split multiplication */
typedef struct { uint64_t lo, hi; } uint128_t;
static inline uint128_t MUL64(uint64_t a, uint64_t b) {
uint128_t r;
@ -148,7 +181,6 @@ static inline uint128_t MUL64(uint64_t a, uint64_t b) {
#endif
static void fe_mul(fe h, const fe f, const fe g) {
/* Schoolbook multiplication with reduction by 19 */
uint128_t t[5] = {0,0,0,0,0};
for (int i = 0; i < 5; i++)
for (int j = 0; j < 5; j++) {
@ -164,7 +196,6 @@ static void fe_mul(fe h, const fe f, const fe g) {
#endif
}
/* Carry chain */
for (int i = 0; i < 5; i++) {
#if defined(__SIZEOF_INT128__)
uint64_t lo = (uint64_t)t[i];
@ -190,31 +221,29 @@ static void fe_mul(fe h, const fe f, const fe g) {
static void fe_sq(fe h, const fe f) { fe_mul(h, f, f); }
/* Compute f^(2^n) by repeated squaring */
static void fe_sq_n(fe h, const fe f, int n) {
fe_sq(h, f);
for (int i = 1; i < n; i++) fe_sq(h, h);
}
/* Inversion: f^(p-2) via addition chain for 2^255-21 */
static void fe_inv(fe h, const fe f) {
fe t0, t1, t2, t3;
fe_sq(t0, f); /* t0 = f^2 */
fe_sq_n(t1, t0, 2); /* t1 = f^8 */
fe_mul(t1, f, t1); /* t1 = f^9 */
fe_mul(t0, t0, t1); /* t0 = f^11 */
fe_sq(t2, t0); /* t2 = f^22 */
fe_mul(t1, t1, t2); /* t1 = f^(2^5 - 1) = f^31 */
fe_sq_n(t2, t1, 5); /* t2 = f^(2^10 - 32) */
fe_mul(t1, t2, t1); /* t1 = f^(2^10 - 1) */
fe_sq_n(t2, t1, 10); fe_mul(t2, t2, t1); /* f^(2^20 - 1) */
fe_sq_n(t3, t2, 20); fe_mul(t2, t3, t2); /* f^(2^40 - 1) */
fe_sq_n(t2, t2, 10); fe_mul(t1, t2, t1); /* f^(2^50 - 1) */
fe_sq_n(t2, t1, 50); fe_mul(t2, t2, t1); /* f^(2^100 - 1) */
fe_sq_n(t3, t2, 100); fe_mul(t2, t3, t2); /* f^(2^200 - 1) */
fe_sq_n(t2, t2, 50); fe_mul(t1, t2, t1); /* f^(2^250 - 1) */
fe_sq_n(t1, t1, 5); fe_mul(h, t1, t0); /* f^(2^255 - 21) */
fe_sq(t0, f);
fe_sq_n(t1, t0, 2);
fe_mul(t1, f, t1);
fe_mul(t0, t0, t1);
fe_sq(t2, t0);
fe_mul(t1, t1, t2);
fe_sq_n(t2, t1, 5);
fe_mul(t1, t2, t1);
fe_sq_n(t2, t1, 10); fe_mul(t2, t2, t1);
fe_sq_n(t3, t2, 20); fe_mul(t2, t3, t2);
fe_sq_n(t2, t2, 10); fe_mul(t1, t2, t1);
fe_sq_n(t2, t1, 50); fe_mul(t2, t2, t1);
fe_sq_n(t3, t2, 100); fe_mul(t2, t3, t2);
fe_sq_n(t2, t2, 50); fe_mul(t1, t2, t1);
fe_sq_n(t1, t1, 5); fe_mul(h, t1, t0);
}
/* ═══════════════════════════════════════════════════════════════════
@ -224,6 +253,16 @@ static void fe_inv(fe h, const fe f) {
* cswap selecting which point to operate on.
* ═══════════════════════════════════════════════════════════════════ */
/* FRAMA-C: X25519 Diffie-Hellman key agreement (RFC 7748)
* CT-REQUIRED: Montgomery ladder — constant-time by construction */
/*@ requires \valid(out + (0..31));
@ requires \valid_read(scalar + (0..31));
@ requires \valid_read(point + (0..31));
@ requires \separated(out + (0..31), scalar + (0..31));
@ requires \separated(out + (0..31), point + (0..31));
@ assigns out[0..31];
@ ensures \initialized(out + (0..31));
*/
void zupt_x25519(uint8_t out[32], const uint8_t scalar[32], const uint8_t point[32]) {
uint8_t e[32];
memcpy(e, scalar, 32);
@ -261,11 +300,6 @@ void zupt_x25519(uint8_t out[32], const uint8_t scalar[32], const uint8_t point[
fe_sq(bb, b);
fe_mul(x2, aa, bb);
fe_sub(e2, aa, bb);
/* a24 = 121666 = (486662+2)/4
* z2 = E * (BB + a24 * E)
* SECURITY NOTE: The formula using BB (not AA) is algebraically correct
* for the Montgomery curve y^2 = x^3 + 486662*x^2 + x.
* Verified against RFC 7748 test vectors and libsodium. */
fe_copy(dc, e2);
for (int i = 0; i < 5; i++) tmp0[i] = 0;
tmp0[0] = 121666;
@ -284,6 +318,13 @@ void zupt_x25519(uint8_t out[32], const uint8_t scalar[32], const uint8_t point[
memset(e, 0, 32);
}
/* FRAMA-C: X25519 with standard basepoint (u=9) */
/*@ requires \valid(out + (0..31));
@ requires \valid_read(scalar + (0..31));
@ requires \separated(out + (0..31), scalar + (0..31));
@ assigns out[0..31];
@ ensures \initialized(out + (0..31));
*/
void zupt_x25519_base(uint8_t out[32], const uint8_t scalar[32]) {
/* Standard basepoint: u = 9 */
uint8_t basepoint[32] = {0};

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/*
* Zupt v2.0.0 — AFL++ Fuzzing Harness: Archive Decompression
* Copyright (c) 2026 Cristian Cezar Moisés — MIT License
*
* Reads a fuzzed .zupt archive from stdin, attempts to extract it.
* Catches crashes, buffer overflows, and undefined behavior.
*
* Build:
* afl-clang-fast -fsanitize=address,undefined -g -O1 \
* -Iinclude -Isrc $(SOURCES) tests/fuzz_decompress.c \
* -lm -lpthread -o fuzz_decompress
*
* Run:
* mkdir -p corpus findings
* # Generate seed corpus:
* ./zupt compress /tmp/fuzz_seed.zupt /path/to/small/testfile
* cp /tmp/fuzz_seed.zupt corpus/
* afl-fuzz -i corpus -o findings -- ./fuzz_decompress
*/
#include "zupt.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int main(void) {
/* Read entire stdin into memory */
size_t cap = 4 * 1024 * 1024; /* 4 MB max fuzz input */
uint8_t *buf = (uint8_t *)malloc(cap);
if (!buf) return 1;
size_t total = 0;
while (total < cap) {
ssize_t n = read(0, buf + total, cap - total);
if (n <= 0) break;
total += (size_t)n;
}
if (total < 64) { free(buf); return 0; } /* Too small for a valid archive */
/* Write to temp file (zupt_extract_archive needs a file path) */
char tmp_arc[] = "/tmp/zupt_fuzz_XXXXXX";
int fd = mkstemp(tmp_arc);
if (fd < 0) { free(buf); return 1; }
write(fd, buf, total);
close(fd);
free(buf);
/* Attempt extraction — this is where crashes happen */
zupt_options_t opts;
zupt_default_options(&opts);
opts.quiet = 1;
char tmp_out[] = "/tmp/zupt_fuzz_out_XXXXXX";
mkdtemp(tmp_out);
zupt_extract_archive(tmp_arc, tmp_out, &opts);
/* Also try test (integrity check without extraction) */
zupt_test_archive(tmp_arc, &opts);
/* Also try list */
zupt_list_archive(tmp_arc, &opts);
/* Cleanup */
unlink(tmp_arc);
/* Note: not recursively removing tmp_out — AFL runs are ephemeral */
return 0;
}

59
tests/fuzz_vv_decompress.c Normal file
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@ -0,0 +1,59 @@
/*
* Zupt v2.0.0 — AFL++ Fuzzing Harness: VaptVupt Codec
* Copyright (c) 2026 Cristian Cezar Moisés — MIT License
*
* Reads fuzzed VaptVupt frame data from stdin, attempts decompression.
* Tests the VaptVupt codec directly (bypassing Zupt archive format).
*
* Build:
* afl-clang-fast -fsanitize=address,undefined -g -O1 -mavx2 \
* -Iinclude -Isrc tests/fuzz_vv_decompress.c \
* src/vv_encoder.c src/vv_decoder.c src/vv_ans.c src/vv_huffman.c \
* src/vv_simd.c src/zupt_xxh.c src/zupt_cpuid.c \
* -lm -lpthread -o fuzz_vv_decompress
*
* Seed corpus generation:
* python3 -c "print('hello world ' * 1000)" > /tmp/vv_seed.txt
* ./zupt compress --vv /tmp/vv_seed.zupt /tmp/vv_seed.txt
* # Extract the VaptVupt frame from the archive block payload
*
* Run:
* afl-fuzz -i corpus_vv -o findings_vv -- ./fuzz_vv_decompress
*/
#if !defined(_DEFAULT_SOURCE) && !defined(_GNU_SOURCE)
#define _DEFAULT_SOURCE 1
#endif
#include "vaptvupt.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int main(void) {
/* Read fuzzed input from stdin */
size_t cap = 2 * 1024 * 1024; /* 2 MB max */
uint8_t *buf = (uint8_t *)malloc(cap);
if (!buf) return 1;
size_t total = 0;
while (total < cap) {
ssize_t n = read(0, buf + total, cap - total);
if (n <= 0) break;
total += (size_t)n;
}
if (total < 16) { free(buf); return 0; } /* Too small for VV frame header */
/* Allocate generous output buffer */
size_t out_cap = 4 * 1024 * 1024; /* 4 MB */
uint8_t *out = (uint8_t *)malloc(out_cap);
if (!out) { free(buf); return 1; }
/* Attempt decompression — this is the fuzz target */
int64_t result = vv_decompress(buf, total, out, out_cap);
(void)result; /* Don't care about return — we're looking for crashes */
free(out);
free(buf);
return 0;
}

60
tests/regression.sh
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@ -1,6 +1,6 @@
#!/bin/sh
# ZUPT v0.5.1 — Comprehensive Regression Test Suite
# Covers: normal, solid, encrypted, edge cases, heterogeneous data
# ZUPT v2.0.0 — Comprehensive Regression Test Suite
# Covers: normal, solid, encrypted, edge cases, VaptVupt codec
# Run: sh tests/regression.sh
set +e # Don't exit on failure — we track pass/fail ourselves
@ -245,6 +245,62 @@ else
pass "Compression comparison complete"
fi
# ═══════════════════════════════════════════════════════
# TEST 13: VAPTVUPT CODEC — Normal mode
# ═══════════════════════════════════════════════════════
echo "── T13: VaptVupt codec normal mode ──"
$ZUPT compress --vv -l 5 "$T/vv_normal.zupt" "$T/data/" 2>/dev/null
$ZUPT extract -o "$T/t13_out" "$T/vv_normal.zupt" 2>/dev/null
check_roundtrip "$T/data" "$T/t13_out" "VaptVupt normal round-trip"
# ═══════════════════════════════════════════════════════
# TEST 14: VAPTVUPT CODEC — Encrypted
# ═══════════════════════════════════════════════════════
echo "── T14: VaptVupt codec + encryption ──"
$ZUPT compress --vv -l 5 -p "VvPass#2026" "$T/vv_enc.zupt" "$T/data/" 2>/dev/null
$ZUPT extract -o "$T/t14_out" -p "VvPass#2026" "$T/vv_enc.zupt" 2>/dev/null
check_roundtrip "$T/data" "$T/t14_out" "VaptVupt encrypted round-trip"
# ═══════════════════════════════════════════════════════
# TEST 15: VAPTVUPT CODEC — Solid mode
# ═══════════════════════════════════════════════════════
echo "── T15: VaptVupt codec + solid mode ──"
$ZUPT compress --vv --solid -l 5 "$T/vv_solid.zupt" "$T/data/" 2>/dev/null
$ZUPT extract -o "$T/t15_out" "$T/vv_solid.zupt" 2>/dev/null
check_roundtrip "$T/data" "$T/t15_out" "VaptVupt solid round-trip"
# ═══════════════════════════════════════════════════════
# TEST 16: VAPTVUPT CODEC — Integrity test
# ═══════════════════════════════════════════════════════
echo "── T16: VaptVupt codec integrity ──"
RESULT=$($ZUPT test "$T/vv_normal.zupt" 2>&1)
echo "$RESULT" | grep -q "0 failed" && pass "VaptVupt integrity" || fail "VaptVupt integrity"
# ═══════════════════════════════════════════════════════
# TEST 17: VAPTVUPT CODEC — All levels (fast/balanced/extreme mapping)
# ═══════════════════════════════════════════════════════
echo "── T17: VaptVupt all levels ──"
VV_LEVEL_OK=1
for lvl in 1 5 9; do
$ZUPT compress --vv -l $lvl "$T/vv_lvl_${lvl}.zupt" "$T/data/records.csv" 2>/dev/null
$ZUPT extract -o "$T/t17_${lvl}" "$T/vv_lvl_${lvl}.zupt" 2>/dev/null
EXTR=$(find "$T/t17_${lvl}" -name "records.csv" -type f | head -1)
if [ -n "$EXTR" ] && diff -q "$T/data/records.csv" "$EXTR" >/dev/null 2>&1; then
: # ok
else
echo " VV Level $lvl: FAIL"
VV_LEVEL_OK=0
fi
done
[ "$VV_LEVEL_OK" -eq 1 ] && pass "VaptVupt all 3 modes round-trip" || fail "VaptVupt some levels failed"
# ═══════════════════════════════════════════════════════
# TEST 18: VAPTVUPT CODEC — List shows VaptVupt codec name
# ═══════════════════════════════════════════════════════
echo "── T18: VaptVupt list shows codec ──"
RESULT=$($ZUPT list "$T/vv_normal.zupt" 2>&1)
echo "$RESULT" | grep -q "TOTAL" && pass "VaptVupt list archive" || fail "VaptVupt list archive"
# ═══════════════════════════════════════════════════════
# SUMMARY
# ═══════════════════════════════════════════════════════

338
tests/test_vaptvupt.c Normal file
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@ -0,0 +1,338 @@
/*
* ZUPT v2.0.0 — VaptVupt Codec Unit Tests
*
* Tests VaptVupt roundtrip in all 3 modes, incompressible fallback,
* and validates integration with Zupt's XXH64 alias.
*
* VAPTVUPT: Integration test suite
* Copyright (c) 2026 Cristian Cezar Moisés
* SPDX-License-Identifier: MIT
*/
#if !defined(_DEFAULT_SOURCE) && !defined(_GNU_SOURCE)
#define _DEFAULT_SOURCE 1
#endif
#include "vaptvupt.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
static int g_pass = 0, g_fail = 0;
#define TEST(name) \
do { fprintf(stderr, " %-50s ", name); } while (0)
#define PASS() \
do { fprintf(stderr, "PASS\n"); g_pass++; } while (0)
#define FAIL(msg) \
do { fprintf(stderr, "FAIL: %s\n", msg); g_fail++; } while (0)
/* ─── Generate test patterns ─── */
static void fill_text(uint8_t *buf, size_t len) {
/* Simulated English-like text with repeating patterns */
const char *words[] = {
"the ", "quick ", "brown ", "fox ", "jumps ", "over ",
"lazy ", "dog ", "and ", "then ", "runs ", "back ",
"to ", "sleep ", "under ", "a ", "warm ", "blanket ",
};
size_t pos = 0;
int wi = 0;
while (pos < len) {
const char *w = words[wi % 18];
size_t wl = strlen(w);
size_t n = (pos + wl <= len) ? wl : len - pos;
memcpy(buf + pos, w, n);
pos += n;
wi++;
}
}
static void fill_binary(uint8_t *buf, size_t len) {
/* Pseudo-random but deterministic binary data with some structure */
uint32_t state = 0xDEADBEEF;
for (size_t i = 0; i < len; i++) {
state = state * 1103515245 + 12345;
buf[i] = (uint8_t)((state >> 16) & 0xFF);
/* Inject some repeat patterns every ~256 bytes */
if ((i & 0xFF) < 8) buf[i] = (uint8_t)(i & 0xFF);
}
}
static void fill_random(uint8_t *buf, size_t len) {
/* High-entropy data: should be incompressible */
uint64_t state = 0x123456789ABCDEF0ULL;
for (size_t i = 0; i < len; i++) {
state ^= state << 13;
state ^= state >> 7;
state ^= state << 17;
buf[i] = (uint8_t)(state & 0xFF);
}
}
/* ─── Core roundtrip test ─── */
static int test_roundtrip(const uint8_t *src, size_t src_len, vv_mode_t mode,
const char *label) {
char name[128];
snprintf(name, sizeof(name), "VV roundtrip %s (mode %d, %zu B)", label, mode, src_len);
TEST(name);
vv_options_t opts;
vv_default_options(&opts);
opts.mode = mode;
opts.checksum = 1;
size_t comp_cap = vv_compress_bound(src_len);
uint8_t *comp = (uint8_t *)malloc(comp_cap);
uint8_t *decomp = (uint8_t *)malloc(src_len + 64);
if (!comp || !decomp) { free(comp); free(decomp); FAIL("alloc"); return 0; }
int64_t csz = vv_compress(src, src_len, comp, comp_cap, &opts);
if (csz <= 0) { free(comp); free(decomp); FAIL("compress failed"); return 0; }
int64_t dsz = vv_decompress(comp, (size_t)csz, decomp, src_len + 64);
if (dsz < 0) { free(comp); free(decomp); FAIL("decompress failed"); return 0; }
if ((size_t)dsz != src_len) { free(comp); free(decomp); FAIL("size mismatch"); return 0; }
if (memcmp(src, decomp, src_len) != 0) { free(comp); free(decomp); FAIL("data mismatch"); return 0; }
free(comp);
free(decomp);
PASS();
return 1;
}
/* ─── Test 1: Roundtrip all 3 modes with text data ─── */
static void test_roundtrip_all_modes(void) {
size_t len = 65536;
uint8_t *data = (uint8_t *)malloc(len);
if (!data) { FAIL("alloc"); return; }
fill_text(data, len);
test_roundtrip(data, len, VV_MODE_ULTRA_FAST, "text");
test_roundtrip(data, len, VV_MODE_BALANCED, "text");
test_roundtrip(data, len, VV_MODE_EXTREME, "text");
free(data);
}
/* ─── Test 2: Roundtrip with binary data ─── */
static void test_roundtrip_binary(void) {
size_t len = 131072;
uint8_t *data = (uint8_t *)malloc(len);
if (!data) { FAIL("alloc"); return; }
fill_binary(data, len);
test_roundtrip(data, len, VV_MODE_BALANCED, "binary");
free(data);
}
/* ─── Test 3: Incompressible data falls back to raw blocks ─── */
static void test_incompressible(void) {
TEST("VV incompressible fallback");
size_t len = 32768;
uint8_t *data = (uint8_t *)malloc(len);
if (!data) { FAIL("alloc"); return; }
fill_random(data, len);
vv_options_t opts;
vv_default_options(&opts);
opts.mode = VV_MODE_ULTRA_FAST;
opts.checksum = 1;
size_t comp_cap = vv_compress_bound(len);
uint8_t *comp = (uint8_t *)malloc(comp_cap);
uint8_t *decomp = (uint8_t *)malloc(len + 64);
if (!comp || !decomp) { free(data); free(comp); free(decomp); FAIL("alloc"); return; }
int64_t csz = vv_compress(data, len, comp, comp_cap, &opts);
if (csz <= 0) { free(data); free(comp); free(decomp); FAIL("compress"); return; }
/* Compressed size should be >= original for random data (stored as raw blocks) */
int64_t dsz = vv_decompress(comp, (size_t)csz, decomp, len + 64);
if (dsz < 0 || (size_t)dsz != len) { free(data); free(comp); free(decomp); FAIL("decompress"); return; }
if (memcmp(data, decomp, len) != 0) { free(data); free(comp); free(decomp); FAIL("data mismatch"); return; }
free(data);
free(comp);
free(decomp);
PASS();
}
/* ─── Test 4: Empty input ─── */
static void test_empty(void) {
TEST("VV empty input roundtrip");
vv_options_t opts;
vv_default_options(&opts);
opts.checksum = 0;
uint8_t comp[256];
uint8_t decomp[64];
int64_t csz = vv_compress((const uint8_t *)"", 0, comp, sizeof(comp), &opts);
if (csz <= 0) { FAIL("compress empty"); return; }
int64_t dsz = vv_decompress(comp, (size_t)csz, decomp, sizeof(decomp));
if (dsz != 0) { FAIL("expected 0 decompressed bytes"); return; }
PASS();
}
/* ─── Test 5: Small data (< VV_MIN_MATCH) ─── */
static void test_small(void) {
TEST("VV small data roundtrip (3 bytes)");
const uint8_t data[] = { 0x41, 0x42, 0x43 };
vv_options_t opts;
vv_default_options(&opts);
opts.checksum = 1;
size_t cap = vv_compress_bound(3);
uint8_t *comp = (uint8_t *)malloc(cap);
uint8_t decomp[64];
if (!comp) { FAIL("alloc"); return; }
int64_t csz = vv_compress(data, 3, comp, cap, &opts);
if (csz <= 0) { free(comp); FAIL("compress"); return; }
int64_t dsz = vv_decompress(comp, (size_t)csz, decomp, sizeof(decomp));
if (dsz != 3) { free(comp); FAIL("size"); return; }
if (memcmp(data, decomp, 3) != 0) { free(comp); FAIL("data"); return; }
free(comp);
PASS();
}
/* ─── Test 6: zupt_xxh64 alias works ─── */
static void test_xxh64_alias(void) {
TEST("VV vv_xxh64 → zupt_xxh64 alias");
const uint8_t data[] = "Hello, VaptVupt!";
uint64_t h1 = vv_xxh64(data, sizeof(data) - 1, 0);
uint64_t h2 = zupt_xxh64(data, sizeof(data) - 1, 0);
if (h1 != h2) { FAIL("hash mismatch"); return; }
if (h1 == 0) { FAIL("zero hash"); return; }
PASS();
}
/* ─── Test 7: Large data roundtrip (multi-block) ─── */
static void test_large_multiblock(void) {
/* 2 MB: forces multiple VaptVupt blocks (VV_MAX_BLOCK_SIZE = 1 MB) */
size_t len = 2 * 1024 * 1024;
uint8_t *data = (uint8_t *)malloc(len);
if (!data) { FAIL("alloc"); return; }
fill_text(data, len);
test_roundtrip(data, len, VV_MODE_BALANCED, "large 2MB");
free(data);
}
/* ─── Test 8: RLE-like data (single repeated byte) ─── */
static void test_rle(void) {
TEST("VV RLE-like data roundtrip");
size_t len = 16384;
uint8_t *data = (uint8_t *)malloc(len);
if (!data) { FAIL("alloc"); return; }
memset(data, 0xAA, len);
vv_options_t opts;
vv_default_options(&opts);
opts.mode = VV_MODE_BALANCED;
opts.checksum = 1;
size_t cap = vv_compress_bound(len);
uint8_t *comp = (uint8_t *)malloc(cap);
uint8_t *decomp = (uint8_t *)malloc(len);
if (!comp || !decomp) { free(data); free(comp); free(decomp); FAIL("alloc"); return; }
int64_t csz = vv_compress(data, len, comp, cap, &opts);
if (csz <= 0) { free(data); free(comp); free(decomp); FAIL("compress"); return; }
/* Should compress extremely well */
if ((size_t)csz > len / 4) {
fprintf(stderr, "(ratio: %zu/%zu) ", (size_t)csz, len);
}
int64_t dsz = vv_decompress(comp, (size_t)csz, decomp, len);
if (dsz < 0 || (size_t)dsz != len) { free(data); free(comp); free(decomp); FAIL("decompress"); return; }
if (memcmp(data, decomp, len) != 0) { free(data); free(comp); free(decomp); FAIL("data"); return; }
free(data);
free(comp);
free(decomp);
PASS();
}
/* ─── Test 9: Window log 20 (1 MB window) ─── */
static void test_window_log_20(void) {
TEST("VV window_log=20 roundtrip");
size_t len = 262144;
uint8_t *data = (uint8_t *)malloc(len);
if (!data) { FAIL("alloc"); return; }
fill_text(data, len);
vv_options_t opts;
vv_default_options(&opts);
opts.mode = VV_MODE_BALANCED;
opts.window_log = 20;
opts.checksum = 1;
size_t cap = vv_compress_bound(len);
uint8_t *comp = (uint8_t *)malloc(cap);
uint8_t *decomp = (uint8_t *)malloc(len);
if (!comp || !decomp) { free(data); free(comp); free(decomp); FAIL("alloc"); return; }
int64_t csz = vv_compress(data, len, comp, cap, &opts);
if (csz <= 0) { free(data); free(comp); free(decomp); FAIL("compress"); return; }
int64_t dsz = vv_decompress(comp, (size_t)csz, decomp, len);
if (dsz < 0 || (size_t)dsz != len) { free(data); free(comp); free(decomp); FAIL("decompress"); return; }
if (memcmp(data, decomp, len) != 0) { free(data); free(comp); free(decomp); FAIL("data"); return; }
free(data);
free(comp);
free(decomp);
PASS();
}
/* ═══════════════════════════════════════════════════════════════ */
int main(void) {
fprintf(stderr, "\n ZUPT v2.0.0 — VaptVupt Codec Unit Tests\n");
fprintf(stderr, " ═══════════════════════════════════════════════\n\n");
test_roundtrip_all_modes(); /* Tests 1a, 1b, 1c */
test_roundtrip_binary(); /* Test 2 */
test_incompressible(); /* Test 3 */
test_empty(); /* Test 4 */
test_small(); /* Test 5 */
test_xxh64_alias(); /* Test 6 */
test_large_multiblock(); /* Test 7 */
test_rle(); /* Test 8 */
test_window_log_20(); /* Test 9 */
fprintf(stderr, "\n ═══════════════════════════════════════════════\n");
fprintf(stderr, " Results: %d passed, %d failed (%d total)\n\n",
g_pass, g_fail, g_pass + g_fail);
return g_fail > 0 ? 1 : 0;
}