Check.hmac_crc32: def of bend-osdev-crypto@0.1.0.0
Import: import bend-osdev-crypto@0.1.0.0/check.bend as Check
Lines 246-252 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=246&end_line=252

import Base
import bend-osdev-bytes@0.1.0.0/bytes.bend as B
import bend-osdev-crc@0.1.0.0/crc.bend as C
import bend-osdev-crypto@0.1.0.0/hmac.bend as Hm
import bend-osdev-crypto@0.1.0.0/inst_crc.bend as CR

# HMAC over CRC-32: one-shot, in two pieces, and verify
def hmac_crc32(+k: B.Octets, +a: B.Octets, +b: B.Octets) -> String:
  +kk = Hm.CrHmac.key(~64n, ~CR.CrCrc32.digest(~C.crc32.spec()), k)
  +t = Hm.CrHmac.mac(~CR.CrCrc32.digest(~C.crc32.spec()), kk, B.Octets.append(a, b))
  +s = Hm.CrHmac.start(~U32, ~CR.CrCrc32.init(~C.crc32.spec()), ~CR.CrCrc32.update(~C.crc32.spec()), kk)
  +t2 = Hm.CrHmac.finish(~U32, ~CR.CrCrc32.init(~C.crc32.spec()), ~CR.CrCrc32.update(~C.crc32.spec()), ~CR.CrCrc32.final(~C.crc32.spec()), Hm.CrHmac.update(~U32, ~CR.CrCrc32.update(~C.crc32.spec()), Hm.CrHmac.update(~U32, ~CR.CrCrc32.update(~C.crc32.spec()), s, a), b))
  cat(B.Octets.hex(t), cat(" ", cat(B.Octets.hex(t2), cat(" ", yes_no(Hm.CrHmac.verify(~CR.CrCrc32.digest(~C.crc32.spec()), kk, B.Octets.append(a, b), t))))))

Uses (18):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  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.append
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=Octets.hex
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crc@0.1.0.0/crc.bend&name=crc32.spec
  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=yes_no
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/hmac.bend&name=CrHmac.finish
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/hmac.bend&name=CrHmac.key
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/hmac.bend&name=CrHmac.mac
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/hmac.bend&name=CrHmac.start
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/hmac.bend&name=CrHmac.update
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/hmac.bend&name=CrHmac.verify
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/inst_crc.bend&name=CrCrc32.digest
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/inst_crc.bend&name=CrCrc32.final
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/inst_crc.bend&name=CrCrc32.init
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/inst_crc.bend&name=CrCrc32.update