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
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
|
# 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.
from __future__ import absolute_import, division, print_function
import datetime
import itertools
import os
import subprocess
import sys
import textwrap
import pytest
from cryptography import utils, x509
from cryptography.exceptions import InternalError, _Reasons
from cryptography.hazmat.backends.interfaces import RSABackend
from cryptography.hazmat.backends.openssl.backend import (
Backend, backend
)
from cryptography.hazmat.backends.openssl.ec import _sn_to_elliptic_curve
from cryptography.hazmat.primitives import hashes, serialization
from cryptography.hazmat.primitives.asymmetric import dsa, ec, padding
from cryptography.hazmat.primitives.ciphers import Cipher
from cryptography.hazmat.primitives.ciphers.algorithms import AES
from cryptography.hazmat.primitives.ciphers.modes import CBC, CTR
from ..primitives.fixtures_dsa import DSA_KEY_2048
from ..primitives.fixtures_rsa import RSA_KEY_2048, RSA_KEY_512
from ..primitives.test_ec import _skip_curve_unsupported
from ...doubles import (
DummyAsymmetricPadding, DummyCipherAlgorithm, DummyHashAlgorithm, DummyMode
)
from ...test_x509 import _load_cert
from ...utils import load_vectors_from_file, raises_unsupported_algorithm
def skip_if_libre_ssl(openssl_version):
if u'LibreSSL' in openssl_version:
pytest.skip("LibreSSL hard-codes RAND_bytes to use arc4random.")
class TestLibreSkip(object):
def test_skip_no(self):
assert skip_if_libre_ssl(u"OpenSSL 0.9.8zf 19 Mar 2015") is None
def test_skip_yes(self):
with pytest.raises(pytest.skip.Exception):
skip_if_libre_ssl(u"LibreSSL 2.1.6")
class DummyMGF(object):
_salt_length = 0
class TestOpenSSL(object):
def test_backend_exists(self):
assert backend
def test_openssl_version_text(self):
"""
This test checks the value of OPENSSL_VERSION_TEXT.
Unfortunately, this define does not appear to have a
formal content definition, so for now we'll test to see
if it starts with OpenSSL or LibreSSL as that appears
to be true for every OpenSSL-alike.
"""
assert (
backend.openssl_version_text().startswith("OpenSSL") or
backend.openssl_version_text().startswith("LibreSSL")
)
def test_supports_cipher(self):
assert backend.cipher_supported(None, None) is False
def test_aes_ctr_always_available(self):
# AES CTR should always be available, even in 1.0.0.
assert backend.cipher_supported(AES(b"\x00" * 16),
CTR(b"\x00" * 16)) is True
def test_register_duplicate_cipher_adapter(self):
with pytest.raises(ValueError):
backend.register_cipher_adapter(AES, CBC, None)
@pytest.mark.parametrize("mode", [DummyMode(), None])
def test_nonexistent_cipher(self, mode):
b = Backend()
b.register_cipher_adapter(
DummyCipherAlgorithm,
type(mode),
lambda backend, cipher, mode: backend._ffi.NULL
)
cipher = Cipher(
DummyCipherAlgorithm(), mode, backend=b,
)
with raises_unsupported_algorithm(_Reasons.UNSUPPORTED_CIPHER):
cipher.encryptor()
def test_openssl_assert(self):
backend.openssl_assert(True)
with pytest.raises(InternalError):
backend.openssl_assert(False)
def test_consume_errors(self):
for i in range(10):
backend._lib.ERR_put_error(backend._lib.ERR_LIB_EVP, 0, 0,
b"test_openssl.py", -1)
assert backend._lib.ERR_peek_error() != 0
errors = backend._consume_errors()
assert backend._lib.ERR_peek_error() == 0
assert len(errors) == 10
def test_ssl_ciphers_registered(self):
meth = backend._lib.TLSv1_method()
ctx = backend._lib.SSL_CTX_new(meth)
assert ctx != backend._ffi.NULL
backend._lib.SSL_CTX_free(ctx)
def test_evp_ciphers_registered(self):
cipher = backend._lib.EVP_get_cipherbyname(b"aes-256-cbc")
assert cipher != backend._ffi.NULL
def test_error_strings_loaded(self):
# returns a value in a static buffer
err = backend._lib.ERR_error_string(101183626, backend._ffi.NULL)
assert backend._ffi.string(err) == (
b"error:0607F08A:digital envelope routines:EVP_EncryptFinal_ex:"
b"data not multiple of block length"
)
def test_unknown_error_in_cipher_finalize(self):
cipher = Cipher(AES(b"\0" * 16), CBC(b"\0" * 16), backend=backend)
enc = cipher.encryptor()
enc.update(b"\0")
backend._lib.ERR_put_error(0, 0, 1,
b"test_openssl.py", -1)
with pytest.raises(InternalError):
enc.finalize()
def test_large_key_size_on_new_openssl(self):
parameters = dsa.generate_parameters(2048, backend)
param_num = parameters.parameter_numbers()
assert utils.bit_length(param_num.p) == 2048
parameters = dsa.generate_parameters(3072, backend)
param_num = parameters.parameter_numbers()
assert utils.bit_length(param_num.p) == 3072
def test_int_to_bn(self):
value = (2 ** 4242) - 4242
bn = backend._int_to_bn(value)
assert bn != backend._ffi.NULL
bn = backend._ffi.gc(bn, backend._lib.BN_free)
assert bn
assert backend._bn_to_int(bn) == value
def test_int_to_bn_inplace(self):
value = (2 ** 4242) - 4242
bn_ptr = backend._lib.BN_new()
assert bn_ptr != backend._ffi.NULL
bn_ptr = backend._ffi.gc(bn_ptr, backend._lib.BN_free)
bn = backend._int_to_bn(value, bn_ptr)
assert bn == bn_ptr
assert backend._bn_to_int(bn_ptr) == value
def test_bn_to_int(self):
bn = backend._int_to_bn(0)
assert backend._bn_to_int(bn) == 0
def test_actual_osrandom_bytes(self, monkeypatch):
skip_if_libre_ssl(backend.openssl_version_text())
sample_data = (b"\x01\x02\x03\x04" * 4)
length = len(sample_data)
def notrandom(size):
assert size == length
return sample_data
monkeypatch.setattr(os, "urandom", notrandom)
buf = backend._ffi.new("char[]", length)
backend._lib.RAND_bytes(buf, length)
assert backend._ffi.buffer(buf)[0:length] == sample_data
class TestOpenSSLRandomEngine(object):
def setup(self):
# The default RAND engine is global and shared between
# tests. We make sure that the default engine is osrandom
# before we start each test and restore the global state to
# that engine in teardown.
current_default = backend._lib.ENGINE_get_default_RAND()
name = backend._lib.ENGINE_get_name(current_default)
assert name == backend._binding._osrandom_engine_name
def teardown(self):
# we need to reset state to being default. backend is a shared global
# for all these tests.
backend.activate_osrandom_engine()
current_default = backend._lib.ENGINE_get_default_RAND()
name = backend._lib.ENGINE_get_name(current_default)
assert name == backend._binding._osrandom_engine_name
@pytest.mark.skipif(sys.executable is None,
reason="No Python interpreter available.")
def test_osrandom_engine_is_default(self, tmpdir):
engine_printer = textwrap.dedent(
"""
import sys
from cryptography.hazmat.backends.openssl.backend import backend
e = backend._lib.ENGINE_get_default_RAND()
name = backend._lib.ENGINE_get_name(e)
sys.stdout.write(backend._ffi.string(name).decode('ascii'))
res = backend._lib.ENGINE_free(e)
assert res == 1
"""
)
engine_name = tmpdir.join('engine_name')
# If we're running tests via ``python setup.py test`` in a clean
# environment then all of our dependencies are going to be installed
# into either the current directory or the .eggs directory. However the
# subprocess won't know to activate these dependencies, so we'll get it
# to do so by passing our entire sys.path into the subprocess via the
# PYTHONPATH environment variable.
env = os.environ.copy()
env["PYTHONPATH"] = os.pathsep.join(sys.path)
with engine_name.open('w') as out:
subprocess.check_call(
[sys.executable, "-c", engine_printer],
env=env,
stdout=out,
stderr=subprocess.PIPE,
)
osrandom_engine_name = backend._ffi.string(
backend._binding._osrandom_engine_name
)
assert engine_name.read().encode('ascii') == osrandom_engine_name
def test_osrandom_sanity_check(self):
# This test serves as a check against catastrophic failure.
buf = backend._ffi.new("char[]", 500)
res = backend._lib.RAND_bytes(buf, 500)
assert res == 1
assert backend._ffi.buffer(buf)[:] != "\x00" * 500
def test_activate_osrandom_no_default(self):
backend.activate_builtin_random()
e = backend._lib.ENGINE_get_default_RAND()
assert e == backend._ffi.NULL
backend.activate_osrandom_engine()
e = backend._lib.ENGINE_get_default_RAND()
name = backend._lib.ENGINE_get_name(e)
assert name == backend._binding._osrandom_engine_name
res = backend._lib.ENGINE_free(e)
assert res == 1
def test_activate_builtin_random(self):
e = backend._lib.ENGINE_get_default_RAND()
assert e != backend._ffi.NULL
name = backend._lib.ENGINE_get_name(e)
assert name == backend._binding._osrandom_engine_name
res = backend._lib.ENGINE_free(e)
assert res == 1
backend.activate_builtin_random()
e = backend._lib.ENGINE_get_default_RAND()
assert e == backend._ffi.NULL
def test_activate_builtin_random_already_active(self):
backend.activate_builtin_random()
e = backend._lib.ENGINE_get_default_RAND()
assert e == backend._ffi.NULL
backend.activate_builtin_random()
e = backend._lib.ENGINE_get_default_RAND()
assert e == backend._ffi.NULL
def test_activate_osrandom_already_default(self):
e = backend._lib.ENGINE_get_default_RAND()
name = backend._lib.ENGINE_get_name(e)
assert name == backend._binding._osrandom_engine_name
res = backend._lib.ENGINE_free(e)
assert res == 1
backend.activate_osrandom_engine()
e = backend._lib.ENGINE_get_default_RAND()
name = backend._lib.ENGINE_get_name(e)
assert name == backend._binding._osrandom_engine_name
res = backend._lib.ENGINE_free(e)
assert res == 1
class TestOpenSSLRSA(object):
def test_generate_rsa_parameters_supported(self):
assert backend.generate_rsa_parameters_supported(1, 1024) is False
assert backend.generate_rsa_parameters_supported(4, 1024) is False
assert backend.generate_rsa_parameters_supported(3, 1024) is True
assert backend.generate_rsa_parameters_supported(3, 511) is False
def test_generate_bad_public_exponent(self):
with pytest.raises(ValueError):
backend.generate_rsa_private_key(public_exponent=1, key_size=2048)
with pytest.raises(ValueError):
backend.generate_rsa_private_key(public_exponent=4, key_size=2048)
def test_cant_generate_insecure_tiny_key(self):
with pytest.raises(ValueError):
backend.generate_rsa_private_key(public_exponent=65537,
key_size=511)
with pytest.raises(ValueError):
backend.generate_rsa_private_key(public_exponent=65537,
key_size=256)
@pytest.mark.skipif(
backend._lib.OPENSSL_VERSION_NUMBER >= 0x1000100f,
reason="Requires an older OpenSSL. Must be < 1.0.1"
)
def test_non_sha1_pss_mgf1_hash_algorithm_on_old_openssl(self):
private_key = RSA_KEY_512.private_key(backend)
with raises_unsupported_algorithm(_Reasons.UNSUPPORTED_HASH):
private_key.signer(
padding.PSS(
mgf=padding.MGF1(
algorithm=hashes.SHA256(),
),
salt_length=padding.PSS.MAX_LENGTH
),
hashes.SHA1()
)
public_key = private_key.public_key()
with raises_unsupported_algorithm(_Reasons.UNSUPPORTED_HASH):
public_key.verifier(
b"sig",
padding.PSS(
mgf=padding.MGF1(
algorithm=hashes.SHA256(),
),
salt_length=padding.PSS.MAX_LENGTH
),
hashes.SHA1()
)
def test_rsa_padding_unsupported_pss_mgf1_hash(self):
assert backend.rsa_padding_supported(
padding.PSS(mgf=padding.MGF1(DummyHashAlgorithm()), salt_length=0)
) is False
def test_rsa_padding_unsupported(self):
assert backend.rsa_padding_supported(DummyAsymmetricPadding()) is False
def test_rsa_padding_supported_pkcs1v15(self):
assert backend.rsa_padding_supported(padding.PKCS1v15()) is True
def test_rsa_padding_supported_pss(self):
assert backend.rsa_padding_supported(
padding.PSS(mgf=padding.MGF1(hashes.SHA1()), salt_length=0)
) is True
def test_rsa_padding_supported_oaep(self):
assert backend.rsa_padding_supported(
padding.OAEP(
mgf=padding.MGF1(algorithm=hashes.SHA1()),
algorithm=hashes.SHA1(),
label=None
),
) is True
@pytest.mark.skipif(
backend._lib.Cryptography_HAS_RSA_OAEP_MD == 0,
reason="Requires OpenSSL with rsa_oaep_md (1.0.2+)"
)
def test_rsa_padding_supported_oaep_sha2_combinations(self):
hashalgs = [
hashes.SHA1(),
hashes.SHA224(),
hashes.SHA256(),
hashes.SHA384(),
hashes.SHA512(),
]
for mgf1alg, oaepalg in itertools.product(hashalgs, hashalgs):
assert backend.rsa_padding_supported(
padding.OAEP(
mgf=padding.MGF1(algorithm=mgf1alg),
algorithm=oaepalg,
label=None
),
) is True
def test_rsa_padding_unsupported_oaep_ripemd160_sha1(self):
assert backend.rsa_padding_supported(
padding.OAEP(
mgf=padding.MGF1(algorithm=hashes.RIPEMD160()),
algorithm=hashes.SHA1(),
label=None
),
) is False
def test_rsa_padding_unsupported_oaep_sha1_ripemd160(self):
assert backend.rsa_padding_supported(
padding.OAEP(
mgf=padding.MGF1(algorithm=hashes.SHA1()),
algorithm=hashes.RIPEMD160(),
label=None
),
) is False
def test_rsa_padding_unsupported_mgf(self):
assert backend.rsa_padding_supported(
padding.OAEP(
mgf=DummyMGF(),
algorithm=hashes.SHA1(),
label=None
),
) is False
assert backend.rsa_padding_supported(
padding.PSS(mgf=DummyMGF(), salt_length=0)
) is False
@pytest.mark.skipif(
backend._lib.Cryptography_HAS_RSA_OAEP_MD == 1,
reason="Requires OpenSSL without rsa_oaep_md (< 1.0.2)"
)
def test_unsupported_mgf1_hash_algorithm_decrypt(self):
private_key = RSA_KEY_512.private_key(backend)
with raises_unsupported_algorithm(_Reasons.UNSUPPORTED_PADDING):
private_key.decrypt(
b"0" * 64,
padding.OAEP(
mgf=padding.MGF1(algorithm=hashes.SHA256()),
algorithm=hashes.SHA1(),
label=None
)
)
@pytest.mark.skipif(
backend._lib.Cryptography_HAS_RSA_OAEP_MD == 1,
reason="Requires OpenSSL without rsa_oaep_md (< 1.0.2)"
)
def test_unsupported_oaep_hash_algorithm_decrypt(self):
private_key = RSA_KEY_512.private_key(backend)
with raises_unsupported_algorithm(_Reasons.UNSUPPORTED_PADDING):
private_key.decrypt(
b"0" * 64,
padding.OAEP(
mgf=padding.MGF1(algorithm=hashes.SHA1()),
algorithm=hashes.SHA256(),
label=None
)
)
def test_unsupported_mgf1_hash_algorithm_ripemd160_decrypt(self):
private_key = RSA_KEY_512.private_key(backend)
with raises_unsupported_algorithm(_Reasons.UNSUPPORTED_PADDING):
private_key.decrypt(
b"0" * 64,
padding.OAEP(
mgf=padding.MGF1(algorithm=hashes.RIPEMD160()),
algorithm=hashes.RIPEMD160(),
label=None
)
)
def test_unsupported_mgf1_hash_algorithm_whirlpool_decrypt(self):
private_key = RSA_KEY_512.private_key(backend)
with raises_unsupported_algorithm(_Reasons.UNSUPPORTED_PADDING):
private_key.decrypt(
b"0" * 64,
padding.OAEP(
mgf=padding.MGF1(algorithm=hashes.Whirlpool()),
algorithm=hashes.Whirlpool(),
label=None
)
)
def test_unsupported_oaep_label_decrypt(self):
private_key = RSA_KEY_512.private_key(backend)
with pytest.raises(ValueError):
private_key.decrypt(
b"0" * 64,
padding.OAEP(
mgf=padding.MGF1(algorithm=hashes.SHA1()),
algorithm=hashes.SHA1(),
label=b"label"
)
)
@pytest.mark.skipif(
backend._lib.OPENSSL_VERSION_NUMBER <= 0x10001000,
reason="Requires an OpenSSL version >= 1.0.1"
)
class TestOpenSSLCMAC(object):
def test_unsupported_cipher(self):
with raises_unsupported_algorithm(_Reasons.UNSUPPORTED_CIPHER):
backend.create_cmac_ctx(DummyCipherAlgorithm())
class TestOpenSSLCreateX509CSR(object):
@pytest.mark.skipif(
backend._lib.OPENSSL_VERSION_NUMBER >= 0x10001000,
reason="Requires an older OpenSSL. Must be < 1.0.1"
)
def test_unsupported_dsa_keys(self):
private_key = DSA_KEY_2048.private_key(backend)
with pytest.raises(NotImplementedError):
backend.create_x509_csr(object(), private_key, hashes.SHA1())
@pytest.mark.skipif(
backend._lib.OPENSSL_VERSION_NUMBER >= 0x10001000,
reason="Requires an older OpenSSL. Must be < 1.0.1"
)
def test_unsupported_ec_keys(self):
_skip_curve_unsupported(backend, ec.SECP256R1())
private_key = ec.generate_private_key(ec.SECP256R1(), backend)
with pytest.raises(NotImplementedError):
backend.create_x509_csr(object(), private_key, hashes.SHA1())
class TestOpenSSLSignX509Certificate(object):
def test_requires_certificate_builder(self):
private_key = RSA_KEY_2048.private_key(backend)
with pytest.raises(TypeError):
backend.create_x509_certificate(
object(), private_key, DummyHashAlgorithm()
)
@pytest.mark.skipif(
backend._lib.OPENSSL_VERSION_NUMBER >= 0x10001000,
reason="Requires an older OpenSSL. Must be < 1.0.1"
)
def test_sign_with_dsa_private_key_is_unsupported(self):
private_key = DSA_KEY_2048.private_key(backend)
builder = x509.CertificateBuilder()
builder = builder.subject_name(
x509.Name([x509.NameAttribute(x509.NameOID.COUNTRY_NAME, u'US')])
).issuer_name(
x509.Name([x509.NameAttribute(x509.NameOID.COUNTRY_NAME, u'US')])
).serial_number(
1
).public_key(
private_key.public_key()
).not_valid_before(
datetime.datetime(2002, 1, 1, 12, 1)
).not_valid_after(
datetime.datetime(2032, 1, 1, 12, 1)
)
with pytest.raises(NotImplementedError):
builder.sign(private_key, hashes.SHA512(), backend)
@pytest.mark.skipif(
backend._lib.OPENSSL_VERSION_NUMBER >= 0x10001000,
reason="Requires an older OpenSSL. Must be < 1.0.1"
)
def test_sign_with_ec_private_key_is_unsupported(self):
_skip_curve_unsupported(backend, ec.SECP256R1())
private_key = ec.generate_private_key(ec.SECP256R1(), backend)
builder = x509.CertificateBuilder()
builder = builder.subject_name(
x509.Name([x509.NameAttribute(x509.NameOID.COUNTRY_NAME, u'US')])
).issuer_name(
x509.Name([x509.NameAttribute(x509.NameOID.COUNTRY_NAME, u'US')])
).serial_number(
1
).public_key(
private_key.public_key()
).not_valid_before(
datetime.datetime(2002, 1, 1, 12, 1)
).not_valid_after(
datetime.datetime(2032, 1, 1, 12, 1)
)
with pytest.raises(NotImplementedError):
builder.sign(private_key, hashes.SHA512(), backend)
class TestOpenSSLSignX509CertificateRevocationList(object):
def test_invalid_builder(self):
private_key = RSA_KEY_2048.private_key(backend)
with pytest.raises(TypeError):
backend.create_x509_crl(object(), private_key, hashes.SHA256())
@pytest.mark.skipif(
backend._lib.OPENSSL_VERSION_NUMBER >= 0x10001000,
reason="Requires an older OpenSSL. Must be < 1.0.1"
)
def test_sign_with_dsa_private_key_is_unsupported(self):
private_key = DSA_KEY_2048.private_key(backend)
builder = x509.CertificateRevocationListBuilder()
builder = builder.issuer_name(
x509.Name([x509.NameAttribute(x509.NameOID.COUNTRY_NAME, u'US')])
).last_update(
datetime.datetime(2002, 1, 1, 12, 1)
).next_update(
datetime.datetime(2032, 1, 1, 12, 1)
)
with pytest.raises(NotImplementedError):
builder.sign(private_key, hashes.SHA1(), backend)
@pytest.mark.skipif(
backend._lib.OPENSSL_VERSION_NUMBER >= 0x10001000,
reason="Requires an older OpenSSL. Must be < 1.0.1"
)
def test_sign_with_ec_private_key_is_unsupported(self):
_skip_curve_unsupported(backend, ec.SECP256R1())
private_key = ec.generate_private_key(ec.SECP256R1(), backend)
builder = x509.CertificateRevocationListBuilder()
builder = builder.issuer_name(
x509.Name([x509.NameAttribute(x509.NameOID.COUNTRY_NAME, u'US')])
).last_update(
datetime.datetime(2002, 1, 1, 12, 1)
).next_update(
datetime.datetime(2032, 1, 1, 12, 1)
)
with pytest.raises(NotImplementedError):
builder.sign(private_key, hashes.SHA512(), backend)
class TestOpenSSLCreateRevokedCertificate(object):
def test_invalid_builder(self):
with pytest.raises(TypeError):
backend.create_x509_revoked_certificate(object())
class TestOpenSSLSerializationWithOpenSSL(object):
def test_pem_password_cb_buffer_too_small(self):
ffi_cb, userdata = backend._pem_password_cb(b"aa")
handle = backend._ffi.new_handle(userdata)
buf = backend._ffi.new('char *')
assert ffi_cb(buf, 1, False, handle) == 0
assert userdata.called == 1
assert isinstance(userdata.exception, ValueError)
def test_pem_password_cb(self):
password = b'abcdefg'
buf_size = len(password) + 1
ffi_cb, userdata = backend._pem_password_cb(password)
handle = backend._ffi.new_handle(userdata)
buf = backend._ffi.new('char[]', buf_size)
assert ffi_cb(buf, buf_size, False, handle) == len(password)
assert userdata.called == 1
assert backend._ffi.string(buf, len(password)) == password
def test_unsupported_evp_pkey_type(self):
key = backend._create_evp_pkey_gc()
with raises_unsupported_algorithm(None):
backend._evp_pkey_to_private_key(key)
with raises_unsupported_algorithm(None):
backend._evp_pkey_to_public_key(key)
def test_very_long_pem_serialization_password(self):
password = "x" * 1024
with pytest.raises(ValueError):
load_vectors_from_file(
os.path.join(
"asymmetric", "Traditional_OpenSSL_Serialization",
"key1.pem"
),
lambda pemfile: (
backend.load_pem_private_key(
pemfile.read().encode(), password
)
)
)
class DummyLibrary(object):
Cryptography_HAS_EC = 0
class TestOpenSSLEllipticCurve(object):
def test_elliptic_curve_supported(self, monkeypatch):
monkeypatch.setattr(backend, "_lib", DummyLibrary())
assert backend.elliptic_curve_supported(None) is False
def test_elliptic_curve_signature_algorithm_supported(self, monkeypatch):
monkeypatch.setattr(backend, "_lib", DummyLibrary())
assert backend.elliptic_curve_signature_algorithm_supported(
None, None
) is False
def test_sn_to_elliptic_curve_not_supported(self):
with raises_unsupported_algorithm(_Reasons.UNSUPPORTED_ELLIPTIC_CURVE):
_sn_to_elliptic_curve(backend, b"fake")
def test_elliptic_curve_exchange_algorithm_supported(self, monkeypatch):
monkeypatch.setattr(backend, "_lib", DummyLibrary())
assert not backend.elliptic_curve_exchange_algorithm_supported(
ec.ECDH(), ec.SECP256R1()
)
@pytest.mark.requires_backend_interface(interface=RSABackend)
class TestRSAPEMSerialization(object):
def test_password_length_limit(self):
password = b"x" * 1024
key = RSA_KEY_2048.private_key(backend)
with pytest.raises(ValueError):
key.private_bytes(
serialization.Encoding.PEM,
serialization.PrivateFormat.PKCS8,
serialization.BestAvailableEncryption(password)
)
class TestGOSTCertificate(object):
def test_numeric_string_x509_name_entry(self):
cert = _load_cert(
os.path.join("x509", "e-trust.ru.der"),
x509.load_der_x509_certificate,
backend
)
with pytest.raises(ValueError) as exc:
cert.subject
# We assert on the message in this case because if the certificate
# fails to load it will also raise a ValueError and this test could
# erroneously pass.
assert str(exc.value) == "Unsupported ASN1 string type. Type: 18"
|