Check.ccm: def of bend-osdev-crypto@0.1.0.0
Import: import bend-osdev-crypto@0.1.0.0/check.bend as Check
Lines 233-240 of bend-osdev-crypto@0.1.0.0/check.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-crypto@0.1.0.0/check.bend&start_line=233&end_line=240

import Base
import bend-osdev-bytes@0.1.0.0/bytes.bend as B
import bend-osdev-cipher-modes@0.1.0.0/aes.bend as X
import bend-osdev-crypto@0.1.0.0/crypto.bend as Cr
import bend-osdev-crypto@0.1.0.0/aead.bend as Ae
import bend-osdev-crypto@0.1.0.0/inst_aes.bend as A
import bend-osdev-crypto@0.1.0.0/inst_ccm.bend as CC

# CCM-AES through the AEAD interface, an m-byte tag: the sealed message, the
# plaintext opened again, and the result of opening it with the tag's last
# byte changed
def ccm(~tlen: Nat, +k: B.Octets, +n: B.Octets, +a: B.Octets, +p: B.Octets) -> String:
  +c = Ae.CrAead.seal_with(~X.CmAesKey, ~A.CrAes.key_enc, ~CC.CrCcm.seal(~X.CmAesKey, ~X.CmAes.encrypt, ~tlen), k, n, a, p)
  +o = Result.bind(&2, &2, Cr.CrError, B.Octets, B.Octets, c, x => Ae.CrAead.open_with(~X.CmAesKey, ~A.CrAes.key_enc, ~CC.CrCcm.open(~X.CmAesKey, ~X.CmAes.encrypt, ~tlen), k, n, a, x))
  +bad = Result.bind(&2, &2, Cr.CrError, B.Octets, B.Octets, c, x => Ae.CrAead.open_with(~X.CmAesKey, ~A.CrAes.key_enc, ~CC.CrCcm.open(~X.CmAesKey, ~X.CmAes.encrypt, ~tlen), k, n, a, flip_last(x)))
  cat(show(c), cat(" ", cat(show(o), cat(" ", show(bad)))))

Uses (15):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result.bind
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  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-cipher-modes@0.1.0.0/aes.bend&name=CmAes.encrypt
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-cipher-modes@0.1.0.0/aes.bend&name=CmAesKey
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/aead.bend&name=CrAead.open_with
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/aead.bend&name=CrAead.seal_with
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/check.bend&name=cat
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/check.bend&name=flip_last
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/check.bend&name=show
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/crypto.bend&name=CrError
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/inst_aes.bend&name=CrAes.key_enc
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/inst_ccm.bend&name=CrCcm.open
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/inst_ccm.bend&name=CrCcm.seal