import hashlib import unittest import binascii TRANS_5C = bytes((x ^ 0x5C) for x in range(256)) TRANS_36 = bytes((x ^ 0x36) for x in range(256)) class Pbkdf2Test(unittest.TestCase): def test_rfc6070_sha1_iter1(self): self.assertEqual( '0c60c80f961f0e71f3a9b524af6012062fe037a6', hashlib.pbkdf2_hmac(hash_name='sha1', password=b'password', salt=b'salt', iterations=1, dklen=20).hex()) def test_rfc6070_sha1_iter2(self): self.assertEqual( 'ea6c014dc72d6f8ccd1ed92ace1d41f0d8de8957', hashlib.pbkdf2_hmac(hash_name='sha1', password=b'password', salt=b'salt', iterations=2, dklen=20).hex()) def pbkdf2_hmac_golden(hash_name, password, salt, iterations, dklen=None): """Password based key derivation function 2 (PKCS #5 v2.0) This Python implementations based on the hmac module about as fast as Mbedtls's PKCS5_PBKDF2_HMAC for short passwords and much faster for long passwords. """ if not isinstance(hash_name, str): raise TypeError(hash_name) if not isinstance(password, (bytes, bytearray)): password = bytes(memoryview(password)) if not isinstance(salt, (bytes, bytearray)): salt = bytes(memoryview(salt)) # Fast inline HMAC implementation inner = hashlib.new(hash_name) outer = hashlib.new(hash_name) blocksize = getattr(inner, 'block_size', 64) if len(password) > blocksize: password = hashlib.new(hash_name, password).digest() password = password + b'\x00' * (blocksize - len(password)) inner.update(password.translate(TRANS_36)) outer.update(password.translate(TRANS_5C)) def prf(msg, inner=inner, outer=outer): # PBKDF2_HMAC uses the password as key. We can re-use the same # digest objects and just update copies to skip initialization. icpy = inner.copy() ocpy = outer.copy() icpy.update(msg) ocpy.update(icpy.digest()) return ocpy.digest() if iterations < 1: raise ValueError(iterations) if dklen is None: dklen = outer.digest_size if dklen < 1: raise ValueError(dklen) dkey = b'' loop = 1 from_bytes = int.from_bytes while len(dkey) < dklen: prev = prf(salt + loop.to_bytes(4, 'big')) # endianess doesn't matter here as long to / from use the same rkey = int.from_bytes(prev, 'big') for i in range(iterations - 1): prev = prf(prev) # rkey = rkey ^ prev rkey ^= from_bytes(prev, 'big') loop += 1 dkey += rkey.to_bytes(inner.digest_size, 'big') return dkey[:dklen] class KDFTests(unittest.TestCase): pbkdf2_test_vectors = [ (b'password', b'salt', 1, None), (b'password', b'salt', 2, None), (b'password', b'salt', 4096, None), # too slow, it takes over a minute on a fast CPU. #(b'password', b'salt', 16777216, None), (b'passwordPASSWORDpassword', b'saltSALTsaltSALTsaltSALTsaltSALTsalt', 4096, -1), (b'pass\0word', b'sa\0lt', 4096, 16), ] scrypt_test_vectors = [ (b'', b'', 16, 1, 1, binascii.unhexlify('77d6576238657b203b19ca42c18a0497f16b4844e3074ae8dfdffa3fede21442fcd0069ded0948f8326a753a0fc81f17e8d3e0fb2e0d3628cf35e20c38d18906')), (b'password', b'NaCl', 1024, 8, 16, binascii.unhexlify('fdbabe1c9d3472007856e7190d01e9fe7c6ad7cbc8237830e77376634b3731622eaf30d92e22a3886ff109279d9830dac727afb94a83ee6d8360cbdfa2cc0640')), (b'pleaseletmein', b'SodiumChloride', 16384, 8, 1, binascii.unhexlify('7023bdcb3afd7348461c06cd81fd38ebfda8fbba904f8e3ea9b543f6545da1f2d5432955613f0fcf62d49705242a9af9e61e85dc0d651e40dfcf017b45575887')), ] pbkdf2_results = { "sha1": [ # official test vectors from RFC 6070 (bytes.fromhex('0c60c80f961f0e71f3a9b524af6012062fe037a6'), None), (bytes.fromhex('ea6c014dc72d6f8ccd1ed92ace1d41f0d8de8957'), None), (bytes.fromhex('4b007901b765489abead49d926f721d065a429c1'), None), #(bytes.fromhex('eefe3d61cd4da4e4e9945b3d6ba2158c2634e984'), None), (bytes.fromhex('3d2eec4fe41c849b80c8d83662c0e44a8b291a964c' 'f2f07038'), 25), (bytes.fromhex('56fa6aa75548099dcc37d7f03425e0c3'), None),], "sha256": [ (bytes.fromhex('120fb6cffcf8b32c43e7225256c4f837' 'a86548c92ccc35480805987cb70be17b'), None), (bytes.fromhex('ae4d0c95af6b46d32d0adff928f06dd0' '2a303f8ef3c251dfd6e2d85a95474c43'), None), (bytes.fromhex('c5e478d59288c841aa530db6845c4c8d' '962893a001ce4e11a4963873aa98134a'), None), #(bytes.fromhex('cf81c66fe8cfc04d1f31ecb65dab4089' # 'f7f179e89b3b0bcb17ad10e3ac6eba46'), None), (bytes.fromhex('348c89dbcbd32b2f32d814b8116e84cf2b17' '347ebc1800181c4e2a1fb8dd53e1c635518c7dac47e9'), 40), (bytes.fromhex('89b69d0516f829893c696226650a8687'), None),], "sha512": [ (bytes.fromhex('867f70cf1ade02cff3752599a3a53dc4af34c7a669815ae5' 'd513554e1c8cf252c02d470a285a0501bad999bfe943c08f' '050235d7d68b1da55e63f73b60a57fce'), None), (bytes.fromhex('e1d9c16aa681708a45f5c7c4e215ceb66e011a2e9f004071' '3f18aefdb866d53cf76cab2868a39b9f7840edce4fef5a82' 'be67335c77a6068e04112754f27ccf4e'), None), (bytes.fromhex('d197b1b33db0143e018b12f3d1d1479e6cdebdcc97c5c0f8' '7f6902e072f457b5143f30602641b3d55cd335988cb36b84' '376060ecd532e039b742a239434af2d5'), None), (bytes.fromhex('8c0511f4c6e597c6ac6315d8f0362e225f3c501495ba23b8' '68c005174dc4ee71115b59f9e60cd9532fa33e0f75aefe30' '225c583a186cd82bd4daea9724a3d3b8'), 64), (bytes.fromhex('9d9e9c4cd21fe4be24d5b8244c759665'), None),], } def _test_pbkdf2_hmac(self, pbkdf2): for digest_name, results in self.pbkdf2_results.items(): for i, vector in enumerate(self.pbkdf2_test_vectors): password, salt, rounds, dklen = vector expected, overwrite_dklen = results[i] if overwrite_dklen: dklen = overwrite_dklen out = pbkdf2(digest_name, password, salt, rounds, dklen) self.assertEqual(out, expected, (digest_name, password, salt, rounds, dklen)) out = pbkdf2(digest_name, memoryview(password), memoryview(salt), rounds, dklen) out = pbkdf2(digest_name, bytearray(password), bytearray(salt), rounds, dklen) self.assertEqual(out, expected) if dklen is None: out = pbkdf2(digest_name, password, salt, rounds) self.assertEqual(out, expected, (digest_name, password, salt, rounds)) self.assertRaises(TypeError, pbkdf2, b'sha1', b'pass', b'salt', 1) self.assertRaises(TypeError, pbkdf2, 'sha1', 'pass', 'salt', 1) self.assertRaises(ValueError, pbkdf2, 'sha1', b'pass', b'salt', 0) self.assertRaises(ValueError, pbkdf2, 'sha1', b'pass', b'salt', -1) self.assertRaises(ValueError, pbkdf2, 'sha1', b'pass', b'salt', 1, 0) self.assertRaises(ValueError, pbkdf2, 'sha1', b'pass', b'salt', 1, -1) with self.assertRaisesRegex(ValueError, 'unsupported hash type'): pbkdf2('unknown', b'pass', b'salt', 1) out = pbkdf2(hash_name='sha1', password=b'password', salt=b'salt', iterations=1, dklen=None) self.assertEqual(out, self.pbkdf2_results['sha1'][0][0]) def test_pbkdf2_hmac_py(self): self._test_pbkdf2_hmac(pbkdf2_hmac_golden) def test_pbkdf2_hmac_c(self): self._test_pbkdf2_hmac(hashlib.pbkdf2_hmac) @unittest.skipUnless(hasattr(hashlib, 'scrypt'), 'Test requires OpenSSL > 1.1') def test_scrypt(self): for password, salt, n, r, p, expected in self.scrypt_test_vectors: result = hashlib.scrypt(password, salt=salt, n=n, r=r, p=p) self.assertEqual(result, expected) # this values should work hashlib.scrypt(b'password', salt=b'salt', n=2, r=8, p=1) # password and salt must be bytes-like with self.assertRaises(TypeError): hashlib.scrypt('password', salt=b'salt', n=2, r=8, p=1) with self.assertRaises(TypeError): hashlib.scrypt(b'password', salt='salt', n=2, r=8, p=1) # require keyword args with self.assertRaises(TypeError): hashlib.scrypt(b'password') with self.assertRaises(TypeError): hashlib.scrypt(b'password', b'salt') with self.assertRaises(TypeError): hashlib.scrypt(b'password', 2, 8, 1, salt=b'salt') for n in [-1, 0, 1, None]: with self.assertRaises((ValueError, OverflowError, TypeError)): hashlib.scrypt(b'password', salt=b'salt', n=n, r=8, p=1) for r in [-1, 0, None]: with self.assertRaises((ValueError, OverflowError, TypeError)): hashlib.scrypt(b'password', salt=b'salt', n=2, r=r, p=1) for p in [-1, 0, None]: with self.assertRaises((ValueError, OverflowError, TypeError)): hashlib.scrypt(b'password', salt=b'salt', n=2, r=8, p=p) for maxmem in [-1, None]: with self.assertRaises((ValueError, OverflowError, TypeError)): hashlib.scrypt(b'password', salt=b'salt', n=2, r=8, p=1, maxmem=maxmem) for dklen in [-1, None]: with self.assertRaises((ValueError, OverflowError, TypeError)): hashlib.scrypt(b'password', salt=b'salt', n=2, r=8, p=1, dklen=dklen) if __name__ == '__main__': unittest.main()