Chacha.xor_bytes: def of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/spec/crypto/chacha.bend as Chacha
Lines 152-156 of bend-collections-laws-crypto@1.0.0.0/spec/crypto/chacha.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/spec/crypto/chacha.bend&start_line=152&end_line=156

import Base

# Byte-wise XOR of a block with the keystream (as long as the block).
def xor_bytes(xs: List<&2, U32>, ks: List<&2, U32>) -> List<&2, U32>:
  match xs ks:
    case x <> xt k <> kt: U32.xor(x, k) <> xor_bytes(xt, kt)
    case _ _: Nil{}

Uses (3):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.xor