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# ===================================================================
#
# Copyright (c) 2014, Legrandin <helderijs@gmail.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
# ===================================================================
import unittest
from Crypto.Util.py3compat import b, bchr
from Crypto.Util.number import bytes_to_long
from Crypto.Util.strxor import strxor
from Crypto.SelfTest.st_common import list_test_cases
from Crypto.SelfTest.loader import load_test_vectors, load_test_vectors_wycheproof
from Crypto.Hash import SHA1, SHA224, SHA256, SHA384, SHA512
from Crypto.PublicKey import RSA
from Crypto.Signature import pss
from Crypto.Signature import PKCS1_PSS
from Crypto.Signature.pss import MGF1
def load_hash_by_name(hash_name):
return __import__("Crypto.Hash." + hash_name, globals(), locals(), ["new"])
class PRNG(object):
def __init__(self, stream):
self.stream = stream
self.idx = 0
def __call__(self, rnd_size):
result = self.stream[self.idx:self.idx + rnd_size]
self.idx += rnd_size
return result
class PSS_Tests(unittest.TestCase):
rsa_key = b'-----BEGIN RSA PRIVATE KEY-----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\nD+NmPL/N4uE57e40tbiU/H7KdyZaDt+5QiTmdhuyAe6CBjKsF2jy\n-----END RSA PRIVATE KEY-----'
msg = b'AAA'
tag = b'\x00[c5\xd8\xb0\x8b!D\x81\x83\x07\xc0\xdd\xb9\xb4\xb2`\x92\xe7\x02\xf1\xe1P\xea\xc3\xf0\xe3>\xddX5\xdd\x8e\xc5\x89\xef\xf3\xc2\xdc\xfeP\x02\x7f\x12+\xc9\xaf\xbb\xec\xfe\xb0\xa5\xb9\x08\x11P\x8fL\xee5\x9b\xb0k{=_\xd2\x14\xfb\x01R\xb7\xfe\x14}b\x03\x8d5Y\x89~}\xfc\xf2l\xd01-\xbd\xeb\x11\xcdV\x11\xe9l\x19k/o5\xa2\x0f\x15\xe7Q$\t=\xec\x1dAB\x19\xa5P\x9a\xaf\xa3G\x86"\xd6~\xf0<p5\x00\x86\xe0\xf3\x99\xc7+\xcfc,\\\x13)v\xcd\xff\x08o\x90\xc5\xd1\xca\x869\xf45\x1e\xfd\xa2\xf1n\xa3\xa6e\xc5\x11Q\xe4@\xbd\x17\x83x\xc9\x9b\xb5\xc7\xea\x03U\x9b\xa0\xccC\x17\xc9T\x86/\x05\x1c\xc7\x95hC\xf9b1\xbb\x05\xc3\xf0\x9a>j\xfcqkbs\x13\x84b\xe4\xbdm(\xed`\xa4F\xfb\x8f.\xe1\x8c)/_\x9eS\x98\xa4v\xb8\xdc\xfe\xf7/D\x18\x19\xb3T\x97:\xe2\x96s\xe8<\xa2\xb4\xb9\xf8/'
def test_positive_1(self):
key = RSA.import_key(self.rsa_key)
h = SHA256.new(self.msg)
verifier = pss.new(key)
verifier.verify(h, self.tag)
def test_negative_1(self):
key = RSA.import_key(self.rsa_key)
h = SHA256.new(self.msg + b'A')
verifier = pss.new(key)
tag = bytearray(self.tag)
self.assertRaises(ValueError, verifier.verify, h, tag)
def test_negative_2(self):
key = RSA.import_key(self.rsa_key)
h = SHA256.new(self.msg)
verifier = pss.new(key, salt_bytes=1000)
tag = bytearray(self.tag)
self.assertRaises(ValueError, verifier.verify, h, tag)
class FIPS_PKCS1_Verify_Tests(unittest.TestCase):
def shortDescription(self):
return "FIPS PKCS1 Tests (Verify)"
def verify_positive(self, hashmod, message, public_key, salt, signature):
prng = PRNG(salt)
hashed = hashmod.new(message)
verifier = pss.new(public_key, salt_bytes=len(salt), rand_func=prng)
verifier.verify(hashed, signature)
def verify_negative(self, hashmod, message, public_key, salt, signature):
prng = PRNG(salt)
hashed = hashmod.new(message)
verifier = pss.new(public_key, salt_bytes=len(salt), rand_func=prng)
self.assertRaises(ValueError, verifier.verify, hashed, signature)
def test_can_sign(self):
test_public_key = RSA.generate(1024).public_key()
verifier = pss.new(test_public_key)
self.assertEqual(verifier.can_sign(), False)
class FIPS_PKCS1_Verify_Tests_KAT(unittest.TestCase):
pass
test_vectors_verify = load_test_vectors(("Signature", "PKCS1-PSS"),
"SigVerPSS_186-3.rsp",
"Signature Verification 186-3",
{'shaalg': lambda x: x,
'result': lambda x: x}) or []
for count, tv in enumerate(test_vectors_verify):
if isinstance(tv, str):
continue
if hasattr(tv, "n"):
modulus = tv.n
continue
if hasattr(tv, "p"):
continue
hash_module = load_hash_by_name(tv.shaalg.upper())
hash_obj = hash_module.new(tv.msg)
public_key = RSA.construct([bytes_to_long(x) for x in (modulus, tv.e)]) # type: ignore
if tv.saltval != b("\x00"):
prng = PRNG(tv.saltval)
verifier = pss.new(public_key, salt_bytes=len(tv.saltval), rand_func=prng)
else:
verifier = pss.new(public_key, salt_bytes=0)
def positive_test(self, hash_obj=hash_obj, verifier=verifier, signature=tv.s):
verifier.verify(hash_obj, signature)
def negative_test(self, hash_obj=hash_obj, verifier=verifier, signature=tv.s):
self.assertRaises(ValueError, verifier.verify, hash_obj, signature)
if tv.result == 'p':
setattr(FIPS_PKCS1_Verify_Tests_KAT, "test_positive_%d" % count, positive_test)
else:
setattr(FIPS_PKCS1_Verify_Tests_KAT, "test_negative_%d" % count, negative_test)
class FIPS_PKCS1_Sign_Tests(unittest.TestCase):
def shortDescription(self):
return "FIPS PKCS1 Tests (Sign)"
def test_can_sign(self):
test_private_key = RSA.generate(1024)
signer = pss.new(test_private_key)
self.assertEqual(signer.can_sign(), True)
class FIPS_PKCS1_Sign_Tests_KAT(unittest.TestCase):
pass
test_vectors_sign = load_test_vectors(("Signature", "PKCS1-PSS"),
"SigGenPSS_186-2.txt",
"Signature Generation 186-2",
{'shaalg': lambda x: x}) or []
test_vectors_sign += load_test_vectors(("Signature", "PKCS1-PSS"),
"SigGenPSS_186-3.txt",
"Signature Generation 186-3",
{'shaalg': lambda x: x}) or []
for count, tv in enumerate(test_vectors_sign):
if isinstance(tv, str):
continue
if hasattr(tv, "n"):
modulus = tv.n
continue
if hasattr(tv, "e"):
private_key = RSA.construct([bytes_to_long(x) for x in (modulus, tv.e, tv.d)]) # type: ignore
continue
hash_module = load_hash_by_name(tv.shaalg.upper())
hash_obj = hash_module.new(tv.msg)
if tv.saltval != b("\x00"):
prng = PRNG(tv.saltval)
signer = pss.new(private_key, salt_bytes=len(tv.saltval), rand_func=prng)
else:
signer = pss.new(private_key, salt_bytes=0)
def new_test(self, hash_obj=hash_obj, signer=signer, result=tv.s):
signature = signer.sign(hash_obj)
self.assertEqual(signature, result)
setattr(FIPS_PKCS1_Sign_Tests_KAT, "test_%d" % count, new_test)
class PKCS1_Legacy_Module_Tests(unittest.TestCase):
"""Verify that the legacy module Crypto.Signature.PKCS1_PSS
behaves as expected. The only difference is that the verify()
method returns True/False and does not raise exceptions."""
def shortDescription(self):
return "Test legacy Crypto.Signature.PKCS1_PSS"
def runTest(self):
key = RSA.generate(1024)
hashed = SHA1.new(b("Test"))
good_signature = PKCS1_PSS.new(key).sign(hashed)
verifier = PKCS1_PSS.new(key.public_key())
self.assertEqual(verifier.verify(hashed, good_signature), True)
# Flip a few bits in the signature
bad_signature = strxor(good_signature, bchr(1) * len(good_signature))
self.assertEqual(verifier.verify(hashed, bad_signature), False)
class PKCS1_All_Hashes_Tests(unittest.TestCase):
def shortDescription(self):
return "Test PKCS#1 PSS signature in combination with all hashes"
def runTest(self):
key = RSA.generate(1280)
signer = pss.new(key)
hash_names = ("MD2", "MD4", "MD5", "RIPEMD160", "SHA1",
"SHA224", "SHA256", "SHA384", "SHA512",
"SHA3_224", "SHA3_256", "SHA3_384", "SHA3_512")
for name in hash_names:
hashed = load_hash_by_name(name).new(b("Test"))
signer.sign(hashed)
from Crypto.Hash import BLAKE2b, BLAKE2s
for hash_size in (20, 32, 48, 64):
hashed_b = BLAKE2b.new(digest_bytes=hash_size, data=b("Test"))
signer.sign(hashed_b)
for hash_size in (16, 20, 28, 32):
hashed_s = BLAKE2s.new(digest_bytes=hash_size, data=b("Test"))
signer.sign(hashed_s)
def get_hash_module(hash_name):
if hash_name == "SHA-512":
hash_module = SHA512
elif hash_name == "SHA-512/224":
hash_module = SHA512.new(truncate="224")
elif hash_name == "SHA-512/256":
hash_module = SHA512.new(truncate="256")
elif hash_name == "SHA-384":
hash_module = SHA384
elif hash_name == "SHA-256":
hash_module = SHA256
elif hash_name == "SHA-224":
hash_module = SHA224
elif hash_name == "SHA-1":
hash_module = SHA1
else:
raise ValueError("Unknown hash algorithm: " + hash_name)
return hash_module
class TestVectorsPSSWycheproof(unittest.TestCase):
def __init__(self, wycheproof_warnings):
unittest.TestCase.__init__(self)
self._wycheproof_warnings = wycheproof_warnings
self._id = "None"
def add_tests(self, filename):
def filter_rsa(group):
return RSA.import_key(group['keyPem'])
def filter_sha(group):
return get_hash_module(group['sha'])
def filter_type(group):
type_name = group['type']
if type_name not in ("RsassaPssVerify", ):
raise ValueError("Unknown type name " + type_name)
def filter_slen(group):
return group['sLen']
def filter_mgf(group):
mgf = group['mgf']
if mgf not in ("MGF1", ):
raise ValueError("Unknown MGF " + mgf)
mgf1_hash = get_hash_module(group['mgfSha'])
def mgf(x, y, mh=mgf1_hash):
return MGF1(x, y, mh)
return mgf
result = load_test_vectors_wycheproof(("Signature", "wycheproof"),
filename,
"Wycheproof PSS signature (%s)" % filename,
group_tag={'key': filter_rsa,
'hash_module': filter_sha,
'sLen': filter_slen,
'mgf': filter_mgf,
'type': filter_type})
return result
def setUp(self):
self.tv = []
self.add_tests("rsa_pss_2048_sha1_mgf1_20_test.json")
self.add_tests("rsa_pss_2048_sha256_mgf1_0_test.json")
self.add_tests("rsa_pss_2048_sha256_mgf1_32_test.json")
self.add_tests("rsa_pss_2048_sha512_256_mgf1_28_test.json")
self.add_tests("rsa_pss_2048_sha512_256_mgf1_32_test.json")
self.add_tests("rsa_pss_3072_sha256_mgf1_32_test.json")
self.add_tests("rsa_pss_4096_sha256_mgf1_32_test.json")
self.add_tests("rsa_pss_4096_sha512_mgf1_32_test.json")
self.add_tests("rsa_pss_misc_test.json")
def shortDescription(self):
return self._id
def warn(self, tv):
if tv.warning and self._wycheproof_warnings:
import warnings
warnings.warn("Wycheproof warning: %s (%s)" % (self._id, tv.comment))
def test_verify(self, tv):
self._id = "Wycheproof RSA PSS Test #%d (%s)" % (tv.id, tv.comment)
hashed_msg = tv.hash_module.new(tv.msg)
signer = pss.new(tv.key, mask_func=tv.mgf, salt_bytes=tv.sLen)
try:
signature = signer.verify(hashed_msg, tv.sig)
except ValueError as e:
if tv.warning:
return
assert not tv.valid
else:
assert tv.valid
self.warn(tv)
def runTest(self):
for tv in self.tv:
self.test_verify(tv)
def get_tests(config={}):
wycheproof_warnings = config.get('wycheproof_warnings')
tests = []
tests += list_test_cases(PSS_Tests)
tests += list_test_cases(FIPS_PKCS1_Verify_Tests)
tests += list_test_cases(FIPS_PKCS1_Sign_Tests)
tests += list_test_cases(PKCS1_Legacy_Module_Tests)
tests += list_test_cases(PKCS1_All_Hashes_Tests)
if config.get('slow_tests'):
tests += list_test_cases(FIPS_PKCS1_Verify_Tests_KAT)
tests += list_test_cases(FIPS_PKCS1_Sign_Tests_KAT)
tests += [TestVectorsPSSWycheproof(wycheproof_warnings)]
return tests
if __name__ == '__main__':
def suite():
return unittest.TestSuite(get_tests())
unittest.main(defaultTest='suite')