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v4.2.1: info correctly reports --pq-only vs hybrid post-quantum mode

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`vaptvupt info` mislabelled full post-quantum (--pq-only, enc_type 0x06)
archives as "PQ Hybrid: YES (ML-KEM-768 + X25519)". Full-PQ archives set
the generic ZUPT_FLAG_PQ_HYBRID header flag (the enc_type byte is what
distinguishes hybrid 0x02 from pure 0x06), but info only checked the flag.

info now seeks to hdr.encryption_header_off, reads the real enc_type from
the encryption-header block, and reports the actual mode: "ML-KEM-768
only, no classical layer" for --pq-only, and hybrid / SDK-v2 / sealed-box
for the others. Reader-side only — no wire-format change; existing 4.2.0
archives are relabelled correctly with no re-encryption.
This commit is contained in:
Cristian Cezar Moisés 2026-07-10 00:20:49 -03:00
commit 9800530d2e
4 changed files with 52 additions and 4 deletions
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2
include/zupt.h
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@ -50,7 +50,7 @@
#define ZUPT_PRODUCT_EXTENSION ".zupt" /* on-disk archive extension (kept stable) */
#define ZUPT_PRODUCT_TAGLINE "Post-quantum backup compression"
#define ZUPT_VERSION_STRING "4.2.0"
#define ZUPT_VERSION_STRING "4.2.1"
/* Vendored codec release (upstream tag) — single source for display strings.
* The codec's own VV_VERSION_* is its internal API version, not the release. */
#define ZUPT_CODEC_RELEASE "2.60.4"