Ccm.Ccm.decrypt: def of bend-osdev-cipher-modes@0.1.0.0
Import: import bend-osdev-cipher-modes@0.1.0.0/ccm.bend as Ccm
Lines 265-270 of bend-osdev-cipher-modes@0.1.0.0/ccm.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-cipher-modes@0.1.0.0/ccm.bend&start_line=265&end_line=270

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

# the plaintext of c (the ciphertext, then the m-byte tag), or CmTagMismatch
# when the tag does not match; no plaintext is released from a message that
# fails
def Ccm.decrypt(~K: Data, ~enc: K -> M.CmBlock -> M.CmBlock, +k: K, +m: Nat, nonce: B.Octets, aad: B.Octets, c: B.Octets) -> Result<&2, &2, M.CmError, B.Octets>:
  +cv = B.Octets.to_list(c)
  ccm.d2.fast(~K, ~enc, Nat.is_le(m, B.len.fast(cv)), k, m, B.Octets.to_list(nonce), B.Octets.to_list(aad), cv)

Uses (9):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_le
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=Octets
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=Octets.to_list
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=len.fast
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-cipher-modes@0.1.0.0/ccm.bend&name=ccm.d2.fast
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-cipher-modes@0.1.0.0/cipher_modes.bend&name=CmBlock
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-cipher-modes@0.1.0.0/cipher_modes.bend&name=CmError