def ccm.ebody.fast

bend-osdev-cipher-modes@0.1.0.0 · ccm.bend:215

import Base
import bend-osdev-bytes@0.1.0.0/bytes.bend as B
import bend-osdev-cipher-modes@0.1.0.0/cipher_modes.bend as M

215def ccm.ebody.fast(~K: Data, ~enc: K -> M.CmBlock -> M.CmBlock, +k: K, +m: Nat, +nv: List<&2, U32>, +av: List<&2, U32>, +pv: List<&2, U32>) -> List<&2, U32>:
216  +l = Nat.sub(15n, B.len(nv))
217  +a0 = ccm.a0(l, nv)
218  B.append.fast(ccm.xcrypt.fast(~K, ~enc, k, a0, M.cm.split.fast(pv)), M.cm.xor_bytes(ccm.tag.fast(~K, ~enc, k, m, l, nv, av, pv), M.cm.bytes_of(enc(k, a0))))