def xchacha20

bend-collections-laws-crypto@1.0.0.0 · src/crypto/chacha/chacha20.bend:159

import Base

159# XChaCha20 with a 24-byte nonce.
160def xchacha20(+key_bytes: List<&2, U32>, counter: U32, +nonce_bytes: List<&2, U32>, +plaintext: List<&2, U32>) -> Maybe<&2, List<&2, U32>>:
161  when(valid(key_bytes, nonce_bytes, 24n), xencrypt_unchecked(key_bytes, counter, nonce_bytes, plaintext))