Hkdf.CrHkdf.extract: def of bend-osdev-crypto@0.1.0.0
Import: import bend-osdev-crypto@0.1.0.0/hkdf.bend as Hkdf
Lines 20-22 of bend-osdev-crypto@0.1.0.0/hkdf.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-crypto@0.1.0.0/hkdf.bend&start_line=20&end_line=22

import Base
import bend-osdev-bytes@0.1.0.0/bytes.bend as B
import bend-osdev-crypto@0.1.0.0/hmac.bend as Hm

# Extract: the pseudorandom key of the input keying material ikm
def CrHkdf.extract(~bsize: Nat, ~dsize: Nat, ~digest: B.Octets -> B.Octets, +salt: B.Octets, ikm: B.Octets) -> B.Octets:
  Hm.CrHmac.mac(~digest, Hm.CrHmac.key(~bsize, ~digest, cr.hkdf.salt(Nat.is_eq(B.Octets.len(salt), 0n), dsize, salt)), ikm)

Uses (7):
  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_eq
  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.len
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/hkdf.bend&name=cr.hkdf.salt
  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