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Editing: test_pss.py
# =================================================================== # # 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')
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