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

    https://github.com/C2SP/wycheproof/tree/master/testvectors_v1
    (commit 7a325932231bd7a724c791c8b0d65ea4d6d2f435, 12 October 2026)

The files are unmodified copies.
