-
Notifications
You must be signed in to change notification settings - Fork 143
/
test_asn1.py
197 lines (154 loc) · 8.44 KB
/
test_asn1.py
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
# Copyright (c) 2015-2018 by Ron Frederick <ronf@timeheart.net> and others.
#
# This program and the accompanying materials are made available under
# the terms of the Eclipse Public License v2.0 which accompanies this
# distribution and is available at:
#
# http://www.eclipse.org/legal/epl-2.0/
#
# This program may also be made available under the following secondary
# licenses when the conditions for such availability set forth in the
# Eclipse Public License v2.0 are satisfied:
#
# GNU General Public License, Version 2.0, or any later versions of
# that license
#
# SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
#
# Contributors:
# Ron Frederick - initial implementation, API, and documentation
"""Unit tests for ASN.1 encoding and decoding"""
import codecs
import unittest
from asyncssh.asn1 import der_encode, der_decode
from asyncssh.asn1 import ASN1EncodeError, ASN1DecodeError
from asyncssh.asn1 import BitString, IA5String, ObjectIdentifier
from asyncssh.asn1 import RawDERObject, TaggedDERObject, PRIVATE
class _TestASN1(unittest.TestCase):
"""Unit tests for ASN.1 module"""
# pylint: disable=bad-whitespace
tests = [
(None, '0500'),
(False, '010100'),
(True, '0101ff'),
(0, '020100'),
(127, '02017f'),
(128, '02020080'),
(256, '02020100'),
(-128, '020180'),
(-129, '0202ff7f'),
(-256, '0202ff00'),
(b'', '0400'),
(b'\0', '040100'),
(b'abc', '0403616263'),
(127*b'\0', '047f' + 127*'00'),
(128*b'\0', '048180' + 128*'00'),
('', '0c00'),
('\0', '0c0100'),
('abc', '0c03616263'),
((), '3000'),
((1,), '3003020101'),
((1, 2), '3006020101020102'),
(frozenset(), '3100'),
(frozenset({1}), '3103020101'),
(frozenset({1, 2}), '3106020101020102'),
(frozenset({-128, 127}), '310602017f020180'),
(BitString(b''), '030100'),
(BitString(b'\0', 7), '03020700'),
(BitString(b'\x80', 7), '03020780'),
(BitString(b'\x80', named=True), '03020780'),
(BitString(b'\x81', named=True), '03020081'),
(BitString(b'\x81\x00', named=True), '03020081'),
(BitString(b'\x80', 6), '03020680'),
(BitString(b'\x80'), '03020080'),
(BitString(b'\x80\x00', 7), '0303078000'),
(BitString(''), '030100'),
(BitString('0'), '03020700'),
(BitString('1'), '03020780'),
(BitString('10'), '03020680'),
(BitString('10000000'), '03020080'),
(BitString('10000001'), '03020081'),
(BitString('100000000'), '0303078000'),
(IA5String(b''), '1600'),
(IA5String(b'\0'), '160100'),
(IA5String(b'abc'), '1603616263'),
(ObjectIdentifier('0.0'), '060100'),
(ObjectIdentifier('1.2'), '06012a'),
(ObjectIdentifier('1.2.840'), '06032a8648'),
(ObjectIdentifier('2.5'), '060155'),
(ObjectIdentifier('2.40'), '060178'),
(TaggedDERObject(0, None), 'a0020500'),
(TaggedDERObject(1, None), 'a1020500'),
(TaggedDERObject(32, None), 'bf20020500'),
(TaggedDERObject(128, None), 'bf8100020500'),
(TaggedDERObject(0, None, PRIVATE), 'e0020500'),
(RawDERObject(0, b'', PRIVATE), 'c000')
]
encode_errors = [
(range, [1]), # Unsupported type
(BitString, [b'', 1]), # Bit count with empty value
(BitString, [b'', -1]), # Invalid unused bit count
(BitString, [b'', 8]), # Invalid unused bit count
(BitString, [b'0c0', 7]), # Unused bits not zero
(BitString, ['', 1]), # Unused bits with string
(BitString, [0]), # Invalid type
(ObjectIdentifier, ['']), # Too few components
(ObjectIdentifier, ['1']), # Too few components
(ObjectIdentifier, ['-1.1']), # First component out of range
(ObjectIdentifier, ['3.1']), # First component out of range
(ObjectIdentifier, ['0.-1']), # Second component out of range
(ObjectIdentifier, ['0.40']), # Second component out of range
(ObjectIdentifier, ['1.-1']), # Second component out of range
(ObjectIdentifier, ['1.40']), # Second component out of range
(ObjectIdentifier, ['1.1.-1']), # Later component out of range
(TaggedDERObject, [0, None, 99]), # Invalid ASN.1 class
(RawDERObject, [0, None, 99]), # Invalid ASN.1 class
]
decode_errors = [
'', # Incomplete data
'01', # Incomplete data
'0101', # Incomplete data
'1f00', # Incomplete data
'1f8000', # Incomplete data
'1f0001', # Incomplete data
'1f80', # Incomplete tag
'0180', # Indefinite length
'050001', # Unexpected bytes at end
'2500', # Constructed null
'050100', # Null with content
'2100', # Constructed boolean
'010102', # Boolean value not 0x00/0xff
'2200', # Constructed integer
'2400', # Constructed octet string
'2c00', # Constructed UTF-8 string
'1000', # Non-constructed sequence
'1100', # Non-constructed set
'2300', # Constructed bit string
'03020800', # Invalid unused bit count
'3600', # Constructed IA5 string
'2600', # Constructed object identifier
'0600', # Empty object identifier
'06020080', # Invalid component
'06020081' # Incomplete component
]
# pylint: enable=bad-whitespace
def test_asn1(self):
"""Unit test ASN.1 module"""
for value, data in self.tests:
data = codecs.decode(data, 'hex')
with self.subTest(msg='encode', value=value):
self.assertEqual(der_encode(value), data)
with self.subTest(msg='decode', data=data):
decoded_value = der_decode(data)
self.assertEqual(decoded_value, value)
self.assertEqual(hash(decoded_value), hash(value))
self.assertEqual(repr(decoded_value), repr(value))
self.assertEqual(str(decoded_value), str(value))
for cls, args in self.encode_errors:
with self.subTest(msg='encode error', cls=cls.__name__, args=args):
with self.assertRaises(ASN1EncodeError):
der_encode(cls(*args))
for data in self.decode_errors:
with self.subTest(msg='decode error', data=data):
with self.assertRaises(ASN1DecodeError):
der_decode(codecs.decode(data, 'hex'))