2 Commits (main)

Author	SHA1	Message	Date
dev	f24a280c28	Implement capsule format 2 of spec v0.9 ... The reference moves to the DateKeys Protocol Specification v0.9, approved by its author on 29 September 2026. Encrypt writes capsule format 2 only; Open and Inspect read formats 1 and 2, and a format 1 capsule keeps the verdict v0.8.2 gave it. Format 2 (spec §22, §29.1, §31, §39): - VERSION in the PRELUDE is the capsule format, capsule.Format; any other value is ERR_UNSUPPORTED_VERSION at step 2. - CONTROL_CBOR has the schema version of its format. Version 2 adds key 6, payload_length (8 bytes, big-endian, at most L_MAX = 2^53 - 2^46), and key 7, padding (1 bloque256, 2 reforzado); it is 103 bytes without extensions, whatever L. - The payload is the content padded with zeros to P = rule(L). Step 17 checks the length and the zeros, and Open writes only the first L bytes. - INNER_ACCESS_AGE holds exactly 16 X25519 stanzas: 1 to 16 credentials, and a dummy in each slot left, in a uniformly random order. Writer rules (spec §62.1): EncryptOptions.Length is required and the source must deliver exactly that many bytes; recipients that are not canonical or of low order are rejected (agewrap.CheckX25519Recipient); self-checks of the header, the control, INNER_ACCESS_AGE and PAYLOAD_AGE. The CLI measures its input, takes -padding and reports the format. Test data: seven format 2 fixtures, padding vectors checked against math/big, format 2 CBOR vectors, and the mutation corpus in both formats with the 22 cases of the third list of spec §64, built without randomness by sealing the fixtures again with their known keys and nonces. The format 1 fixtures are kept byte for byte and never regenerated; the differential corpus keeps its 1825 cases and adds a block per format 2 fixture. The spec copy loses its "to be implemented" markers, and the READMEs, CHANGELOG, traceability and testdata/README.md follow v0.9. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	1 week ago
dev	9cbcab10b2	Hand-written CBOR codec and shared test vectors (plan steps 2b and 3) ... Step 2b: package codec is rewritten without reflection or struct tags. A strict Decoder accepts only the spec §58 profile, Unmarshal decodes, re-encodes and compares, Peek reads the type tag and version, and Walk is a bounded iterative helper for vectors and fuzzing. Every schema has its own hand-written encoder and decoder that checks all CDDL rules before the fields with their own error codes. github.com/fxamacker/cbor/v2 and github.com/x448/float16 are gone; nothing replaces them. Valid objects encode and decode exactly as before (1.34 million differential verdicts); the invalid-input differences are documented in CHANGELOG and traceability decision 12. A review found and fixed an access_policy check that truncated to uint8. Step 3: testdata gains vectors/cbor.json (generic and per-schema CBOR vectors), vectors/mutations.json (the 55-case mutation corpus, replayable offline), vectors/inspect_differential.json (1,825 fixed-seed mutations with the Go verdict) and one inspect -json golden per fixture, all regenerated byte-identically by genfixtures and documented in testdata/README.md for second implementations. Gate green with 90 s of fuzzing per target on all 15 targets; codec at 100 % coverage; pre-existing testdata byte-identical. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2 weeks ago