openpgp: generate X25519 keys according to spec.
Previously we just used a random 32 byte value. Correct X25519 keys require bits 0 to 2 of the first byte and bit 7 of the last byte to be 0.
Closes #162 (closed)
Previously we just used a random 32 byte value. Correct X25519 keys require bits 0 to 2 of the first byte and bit 7 of the last byte to be 0.
Closes #162 (closed)