
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

# 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 binascii
import os

import pytest

from cryptography.hazmat.backends.interfaces import CipherBackend
from cryptography.hazmat.primitives.ciphers import algorithms, modes

from .utils import generate_encrypt_test
from ...utils import load_nist_vectors


@pytest.mark.supported(
    only_if=lambda backend: backend.cipher_supported(
        algorithms.CAST5("\x00" * 16), modes.ECB()
    ),
    skip_message="Does not support CAST5 ECB",
)
@pytest.mark.requires_backend_interface(interface=CipherBackend)
class TestCAST5ModeECB(object):
    test_ECB = generate_encrypt_test(
        load_nist_vectors,
        os.path.join("ciphers", "CAST5"),
        ["cast5-ecb.txt"],
        lambda key, **kwargs: algorithms.CAST5(binascii.unhexlify((key))),
        lambda **kwargs: modes.ECB(),
    )


@pytest.mark.supported(
    only_if=lambda backend: backend.cipher_supported(
        algorithms.CAST5("\x00" * 16), modes.CBC("\x00" * 8)
    ),
    skip_message="Does not support CAST5 CBC",
)
@pytest.mark.requires_backend_interface(interface=CipherBackend)
class TestCAST5ModeCBC(object):
    test_CBC = generate_encrypt_test(
        load_nist_vectors,
        os.path.join("ciphers", "CAST5"),
        ["cast5-cbc.txt"],
        lambda key, **kwargs: algorithms.CAST5(binascii.unhexlify((key))),
        lambda iv, **kwargs: modes.CBC(binascii.unhexlify(iv))
    )


@pytest.mark.supported(
    only_if=lambda backend: backend.cipher_supported(
        algorithms.CAST5("\x00" * 16), modes.OFB("\x00" * 8)
    ),
    skip_message="Does not support CAST5 OFB",
)
@pytest.mark.requires_backend_interface(interface=CipherBackend)
class TestCAST5ModeOFB(object):
    test_OFB = generate_encrypt_test(
        load_nist_vectors,
        os.path.join("ciphers", "CAST5"),
        ["cast5-ofb.txt"],
        lambda key, **kwargs: algorithms.CAST5(binascii.unhexlify((key))),
        lambda iv, **kwargs: modes.OFB(binascii.unhexlify(iv))
    )


@pytest.mark.supported(
    only_if=lambda backend: backend.cipher_supported(
        algorithms.CAST5("\x00" * 16), modes.CFB("\x00" * 8)
    ),
    skip_message="Does not support CAST5 CFB",
)
@pytest.mark.requires_backend_interface(interface=CipherBackend)
class TestCAST5ModeCFB(object):
    test_CFB = generate_encrypt_test(
        load_nist_vectors,
        os.path.join("ciphers", "CAST5"),
        ["cast5-cfb.txt"],
        lambda key, **kwargs: algorithms.CAST5(binascii.unhexlify((key))),
        lambda iv, **kwargs: modes.CFB(binascii.unhexlify(iv))
    )


@pytest.mark.supported(
    only_if=lambda backend: backend.cipher_supported(
        algorithms.CAST5("\x00" * 16), modes.CTR("\x00" * 8)
    ),
    skip_message="Does not support CAST5 CTR",
)
@pytest.mark.requires_backend_interface(interface=CipherBackend)
class TestCAST5ModeCTR(object):
    test_CTR = generate_encrypt_test(
        load_nist_vectors,
        os.path.join("ciphers", "CAST5"),
        ["cast5-ctr.txt"],
        lambda key, **kwargs: algorithms.CAST5(binascii.unhexlify((key))),
        lambda iv, **kwargs: modes.CTR(binascii.unhexlify(iv))
    )