Lowercase hex in ML-DSA sign seed test vectors

[sgmenda]

ML-DSA sign seed test vectors use uppercase hex, inconsistent with the rest of the repo.

Lowercases privateSeed hex values in mldsa_{44,65,87}_sign_seed_test.json.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and the ISC license.

[cpu]

This seems reasonable to me, but also like something that might be nice to enforce in CI. WDYT?

[cpu]

cpu added 2 commits 4 minutes ago

I pushed two small tool update commits to add CI verification that hex bytes format values are lowercase. Hope you don't mind!

Example output from applying the updated linter to this branch with 7d30358 reverted:

2026/02/24 12:43:33 ❌ "testvectors_v1/mldsa_87_sign_seed_test.json": vector doesn't validate with schema: jsonschema validation failed with 'file:///home/daniel/Code/Misc/wycheproof/schemas/mldsa_sign_seed_schema.json#'
- at '/testGroups/8/privateSeed': '0D58219132746BE077DFE821E9F8FD87857B28AB91D6A567E312A73E2636032C' is not valid HexBytes: invalid non-lowercase HexBytes value
- at '/testGroups/9/privateSeed': '146C47AB9F88408EB76A813294D533B29D7E0FDA75DA5A4E7C69EB61EFEEBB78' is not valid HexBytes: invalid non-lowercase HexBytes value
- at '/testGroups/10/privateSeed': '049D9B0B646A2AC7F50B63CE5E4BFE44C9B87634F4FF6C14C513E388B8A1F808' is not valid HexBytes: invalid non-lowercase HexBytes value
- at '/testGroups/11/privateSeed': '9823DDDE446A8EA883DAD3AC6477F79839FDC2D2DEF2416BE0A8B71CFBC3F5C6' is not valid HexBytes: invalid non-lowercase HexBytes value
- at '/testGroups/12/privateSeed': 'AE213FE8589B414F53780D8B9B6837179967E13CB474C5AD365C043778D2BC90' is not valid HexBytes: invalid non-lowercase HexBytes value
- at '/testGroups/13/privateSeed': 'B5C07ECEFE9E7C3B885FDEF032BDF9F807B4011E2DFE6806C088D2081631C8EB' is not valid HexBytes: invalid non-lowercase HexBytes value
- at '/testGroups/14/privateSeed': 'E8FC3C9FAD711DDA2946334FBBD331468D6E9AB48EB86DCD03F300A17AEBC5E5' is not valid HexBytes: invalid non-lowercase HexBytes value
- at '/testGroups/15/privateSeed': '151F80886D6CE8C3B428964FE02C40CA0C8EFFA100EE089E54D785344FCCF719' is not valid HexBytes: invalid non-lowercase HexBytes value
- at '/testGroups/16/privateSeed': '48BEFFB4C97E59E474E1906F39888BE5AE62F6A011C05EF6A6B8D1E54F2171B7' is not valid HexBytes: invalid non-lowercase HexBytes value
- at '/testGroups/17/privateSeed': 'FE2DA9DD93A077FCB6452AC88D0A5762EB896BAAAC6CE7D01CB1370BA8322390' is not valid HexBytes: invalid non-lowercase HexBytes value