1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
|
# 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
import pytest
from cryptography.exceptions import InvalidSignature
from cryptography.hazmat.primitives import hashes, serialization
from cryptography.hazmat.primitives.asymmetric import padding, rsa
from .utils import wycheproof_tests
_DIGESTS = {
"SHA-1": hashes.SHA1(),
"SHA-224": hashes.SHA224(),
"SHA-256": hashes.SHA256(),
"SHA-384": hashes.SHA384(),
"SHA-512": hashes.SHA512(),
# Not supported by OpenSSL<3 for RSA signing.
# Enable these when we require CRYPTOGRAPHY_OPENSSL_300_OR_GREATER
"SHA-512/224": None,
"SHA-512/256": None,
"SHA3-224": hashes.SHA3_224(),
"SHA3-256": hashes.SHA3_256(),
"SHA3-384": hashes.SHA3_384(),
"SHA3-512": hashes.SHA3_512(),
}
def should_verify(backend, wycheproof):
if wycheproof.valid:
return True
if wycheproof.acceptable:
return not wycheproof.has_flag("MissingNull")
return False
@wycheproof_tests(
"rsa_signature_test.json",
"rsa_signature_2048_sha224_test.json",
"rsa_signature_2048_sha256_test.json",
"rsa_signature_2048_sha384_test.json",
"rsa_signature_2048_sha512_test.json",
"rsa_signature_2048_sha512_224_test.json",
"rsa_signature_2048_sha512_256_test.json",
"rsa_signature_2048_sha3_224_test.json",
"rsa_signature_2048_sha3_256_test.json",
"rsa_signature_2048_sha3_384_test.json",
"rsa_signature_2048_sha3_512_test.json",
"rsa_signature_3072_sha256_test.json",
"rsa_signature_3072_sha384_test.json",
"rsa_signature_3072_sha512_test.json",
"rsa_signature_3072_sha512_256_test.json",
"rsa_signature_3072_sha3_256_test.json",
"rsa_signature_3072_sha3_384_test.json",
"rsa_signature_3072_sha3_512_test.json",
"rsa_signature_4096_sha384_test.json",
"rsa_signature_4096_sha512_test.json",
"rsa_signature_4096_sha512_256_test.json",
)
def test_rsa_pkcs1v15_signature(backend, wycheproof):
key = wycheproof.cache_value_to_group(
"cached_key",
lambda: serialization.load_der_public_key(
binascii.unhexlify(wycheproof.testgroup["keyDer"]),
),
)
assert isinstance(key, rsa.RSAPublicKey)
digest = _DIGESTS[wycheproof.testgroup["sha"]]
if digest is None or not backend.hash_supported(digest):
pytest.skip(
"Hash {} not supported".format(wycheproof.testgroup["sha"])
)
if should_verify(backend, wycheproof):
key.verify(
binascii.unhexlify(wycheproof.testcase["sig"]),
binascii.unhexlify(wycheproof.testcase["msg"]),
padding.PKCS1v15(),
digest,
)
else:
with pytest.raises(InvalidSignature):
key.verify(
binascii.unhexlify(wycheproof.testcase["sig"]),
binascii.unhexlify(wycheproof.testcase["msg"]),
padding.PKCS1v15(),
digest,
)
@wycheproof_tests("rsa_sig_gen_misc_test.json")
def test_rsa_pkcs1v15_signature_generation(backend, wycheproof):
key = wycheproof.cache_value_to_group(
"cached_key",
lambda: serialization.load_pem_private_key(
wycheproof.testgroup["privateKeyPem"].encode("ascii"),
password=None,
unsafe_skip_rsa_key_validation=True,
),
)
assert isinstance(key, rsa.RSAPrivateKey)
digest = _DIGESTS[wycheproof.testgroup["sha"]]
assert digest is not None
if backend._fips_enabled:
if key.key_size < backend._fips_rsa_min_key_size or isinstance(
digest, hashes.SHA1
):
pytest.skip(
f"Invalid params for FIPS. key: {key.key_size} bits, "
f"digest: {digest.name}"
)
sig = key.sign(
binascii.unhexlify(wycheproof.testcase["msg"]),
padding.PKCS1v15(),
digest,
)
assert sig == binascii.unhexlify(wycheproof.testcase["sig"])
@wycheproof_tests(
"rsa_pss_2048_sha1_mgf1_20_test.json",
"rsa_pss_2048_sha256_mgf1_0_test.json",
"rsa_pss_2048_sha256_mgf1_32_test.json",
"rsa_pss_2048_sha512_256_mgf1_28_test.json",
"rsa_pss_2048_sha512_256_mgf1_32_test.json",
"rsa_pss_3072_sha256_mgf1_32_test.json",
"rsa_pss_4096_sha256_mgf1_32_test.json",
"rsa_pss_4096_sha512_mgf1_32_test.json",
"rsa_pss_misc_test.json",
)
def test_rsa_pss_signature(backend, wycheproof):
digest = _DIGESTS[wycheproof.testgroup["sha"]]
if backend._fips_enabled and isinstance(digest, hashes.SHA1):
pytest.skip("Invalid params for FIPS. SHA1 is disallowed")
key = wycheproof.cache_value_to_group(
"cached_key",
lambda: serialization.load_der_public_key(
binascii.unhexlify(wycheproof.testgroup["keyDer"]),
),
)
assert isinstance(key, rsa.RSAPublicKey)
mgf_digest = _DIGESTS[wycheproof.testgroup["mgfSha"]]
if digest is None or mgf_digest is None:
pytest.skip(
"PSS with digest={} and MGF digest={} not supported".format(
wycheproof.testgroup["sha"],
wycheproof.testgroup["mgfSha"],
)
)
if wycheproof.valid or wycheproof.acceptable:
key.verify(
binascii.unhexlify(wycheproof.testcase["sig"]),
binascii.unhexlify(wycheproof.testcase["msg"]),
padding.PSS(
mgf=padding.MGF1(mgf_digest),
salt_length=wycheproof.testgroup["sLen"],
),
digest,
)
else:
with pytest.raises(InvalidSignature):
key.verify(
binascii.unhexlify(wycheproof.testcase["sig"]),
binascii.unhexlify(wycheproof.testcase["msg"]),
padding.PSS(
mgf=padding.MGF1(mgf_digest),
salt_length=wycheproof.testgroup["sLen"],
),
digest,
)
@wycheproof_tests(
"rsa_oaep_2048_sha1_mgf1sha1_test.json",
"rsa_oaep_2048_sha224_mgf1sha1_test.json",
"rsa_oaep_2048_sha224_mgf1sha224_test.json",
"rsa_oaep_2048_sha256_mgf1sha1_test.json",
"rsa_oaep_2048_sha256_mgf1sha256_test.json",
"rsa_oaep_2048_sha384_mgf1sha1_test.json",
"rsa_oaep_2048_sha384_mgf1sha384_test.json",
"rsa_oaep_2048_sha512_mgf1sha1_test.json",
"rsa_oaep_2048_sha512_mgf1sha512_test.json",
"rsa_oaep_3072_sha256_mgf1sha1_test.json",
"rsa_oaep_3072_sha256_mgf1sha256_test.json",
"rsa_oaep_3072_sha512_mgf1sha1_test.json",
"rsa_oaep_3072_sha512_mgf1sha512_test.json",
"rsa_oaep_4096_sha256_mgf1sha1_test.json",
"rsa_oaep_4096_sha256_mgf1sha256_test.json",
"rsa_oaep_4096_sha512_mgf1sha1_test.json",
"rsa_oaep_4096_sha512_mgf1sha512_test.json",
"rsa_oaep_misc_test.json",
)
def test_rsa_oaep_encryption(backend, wycheproof):
digest = _DIGESTS[wycheproof.testgroup["sha"]]
mgf_digest = _DIGESTS[wycheproof.testgroup["mgfSha"]]
assert digest is not None
assert mgf_digest is not None
padding_algo = padding.OAEP(
mgf=padding.MGF1(algorithm=mgf_digest),
algorithm=digest,
label=binascii.unhexlify(wycheproof.testcase["label"]),
)
if not backend.rsa_encryption_supported(padding_algo):
pytest.skip(
f"Does not support OAEP using {mgf_digest.name} MGF1 "
f"or {digest.name} hash."
)
key = wycheproof.cache_value_to_group(
"cached_key",
lambda: serialization.load_pem_private_key(
wycheproof.testgroup["privateKeyPem"].encode("ascii"),
password=None,
unsafe_skip_rsa_key_validation=True,
),
)
assert isinstance(key, rsa.RSAPrivateKey)
if backend._fips_enabled and key.key_size < backend._fips_rsa_min_key_size:
pytest.skip("Invalid params for FIPS. <2048 bit keys are disallowed")
if wycheproof.valid or wycheproof.acceptable:
pt = key.decrypt(
binascii.unhexlify(wycheproof.testcase["ct"]), padding_algo
)
assert pt == binascii.unhexlify(wycheproof.testcase["msg"])
else:
with pytest.raises(ValueError):
key.decrypt(
binascii.unhexlify(wycheproof.testcase["ct"]), padding_algo
)
@pytest.mark.supported(
only_if=lambda backend: backend.rsa_encryption_supported(
padding.PKCS1v15()
),
skip_message="Does not support PKCS1v1.5 for encryption.",
)
@wycheproof_tests(
"rsa_pkcs1_2048_test.json",
"rsa_pkcs1_3072_test.json",
"rsa_pkcs1_4096_test.json",
)
def test_rsa_pkcs1_encryption(backend, wycheproof):
key = wycheproof.cache_value_to_group(
"cached_key",
lambda: serialization.load_pem_private_key(
wycheproof.testgroup["privateKeyPem"].encode("ascii"),
password=None,
unsafe_skip_rsa_key_validation=True,
),
)
assert isinstance(key, rsa.RSAPrivateKey)
if wycheproof.valid:
pt = key.decrypt(
binascii.unhexlify(wycheproof.testcase["ct"]), padding.PKCS1v15()
)
assert pt == binascii.unhexlify(wycheproof.testcase["msg"])
else:
if backend._lib.Cryptography_HAS_IMPLICIT_RSA_REJECTION:
try:
assert key.decrypt(
binascii.unhexlify(wycheproof.testcase["ct"]),
padding.PKCS1v15(),
) != binascii.unhexlify(wycheproof.testcase["ct"])
except ValueError:
# Some raise ValueError due to length mismatch.
pass
else:
with pytest.raises(ValueError):
key.decrypt(
binascii.unhexlify(wycheproof.testcase["ct"]),
padding.PKCS1v15(),
)
|
