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Editing: generate_hkdf.py
# This file is dual licensed under the terms of the Apache License, Version # 2.0, and the BSD License. See the LICENSE file in the root of this repository # for complete details. import binascii from cryptography.hazmat.primitives import hashes from cryptography.hazmat.primitives.kdf.hkdf import HKDF IKM = binascii.unhexlify(b"0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b") L = 1200 OKM = HKDF( algorithm=hashes.SHA256(), length=L, salt=None, info=None, ).derive(IKM) def _build_vectors(): output = [ "COUNT = 0", "Hash = SHA-256", "IKM = " + binascii.hexlify(IKM).decode("ascii"), "salt = ", "info = ", f"L = {L}", "OKM = " + binascii.hexlify(OKM).decode("ascii"), ] return "\n".join(output) def _write_file(data, filename): with open(filename, "w") as f: f.write(data) if __name__ == "__main__": _write_file(_build_vectors(), "hkdf.txt")
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