- gpg interop things for Ed25519
- gpg22: T5120: Accept cleartext signing key for Ed25519 generated by 2.3, which may have leading zeros for private part.
- gpg23: T5331: don't emit signatures with Ed25519 having leading zeros, to be compatible to 2.2
- Note that
- 2.3 still generate Ed25519 key with private part having leading zeros.
- Both of 2.2 and 2.3 accept signatures having leading zeros.
- Both of 2.2 and 2.3 accept signatures removing leading zeros (recover leading zeros).