Test vectors from Wycheproof (Apache 2.0 license), in the v1 format:

    https://github.com/C2SP/wycheproof/tree/master/testvectors_v1
    (commit d17cc89fa5c8f4f4d378b5385ebf75da5d0926c9, 23 October 2026)

The files are unmodified copies.
