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
|
"""Test the binascii C module."""
import unittest
import binascii
import array
# Note: "*_hex" functions are aliases for "(un)hexlify"
b2a_functions = ['b2a_base64', 'b2a_hex', 'b2a_hqx', 'b2a_qp', 'b2a_uu',
'hexlify', 'rlecode_hqx']
a2b_functions = ['a2b_base64', 'a2b_hex', 'a2b_hqx', 'a2b_qp', 'a2b_uu',
'unhexlify', 'rledecode_hqx']
all_functions = a2b_functions + b2a_functions + ['crc32', 'crc_hqx']
class BinASCIITest(unittest.TestCase):
type2test = bytes
# Create binary test data
rawdata = b"The quick brown fox jumps over the lazy dog.\r\n"
# Be slow so we don't depend on other modules
rawdata += bytes(range(256))
rawdata += b"\r\nHello world.\n"
def setUp(self):
self.data = self.type2test(self.rawdata)
def test_exceptions(self):
# Check module exceptions
self.assertTrue(issubclass(binascii.Error, Exception))
self.assertTrue(issubclass(binascii.Incomplete, Exception))
def test_functions(self):
# Check presence of all functions
for name in all_functions:
self.assertTrue(hasattr(getattr(binascii, name), '__call__'))
self.assertRaises(TypeError, getattr(binascii, name))
def test_returned_value(self):
# Limit to the minimum of all limits (b2a_uu)
MAX_ALL = 45
raw = self.rawdata[:MAX_ALL]
for fa, fb in zip(a2b_functions, b2a_functions):
a2b = getattr(binascii, fa)
b2a = getattr(binascii, fb)
try:
a = b2a(self.type2test(raw))
res = a2b(self.type2test(a))
except Exception as err:
self.fail("{}/{} conversion raises {!r}".format(fb, fa, err))
if fb == 'b2a_hqx':
# b2a_hqx returns a tuple
res, _ = res
self.assertEqual(res, raw, "{}/{} conversion: "
"{!r} != {!r}".format(fb, fa, res, raw))
self.assertIsInstance(res, bytes)
self.assertIsInstance(a, bytes)
self.assertLess(max(a), 128)
self.assertIsInstance(binascii.crc_hqx(raw, 0), int)
self.assertIsInstance(binascii.crc32(raw), int)
def test_base64valid(self):
# Test base64 with valid data
MAX_BASE64 = 57
lines = []
for i in range(0, len(self.rawdata), MAX_BASE64):
b = self.type2test(self.rawdata[i:i+MAX_BASE64])
a = binascii.b2a_base64(b)
lines.append(a)
res = bytes()
for line in lines:
a = self.type2test(line)
b = binascii.a2b_base64(a)
res += b
self.assertEqual(res, self.rawdata)
def test_base64invalid(self):
# Test base64 with random invalid characters sprinkled throughout
# (This requires a new version of binascii.)
MAX_BASE64 = 57
lines = []
for i in range(0, len(self.data), MAX_BASE64):
b = self.type2test(self.rawdata[i:i+MAX_BASE64])
a = binascii.b2a_base64(b)
lines.append(a)
fillers = bytearray()
valid = b"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789+/"
for i in range(256):
if i not in valid:
fillers.append(i)
def addnoise(line):
noise = fillers
ratio = len(line) // len(noise)
res = bytearray()
while line and noise:
if len(line) // len(noise) > ratio:
c, line = line[0], line[1:]
else:
c, noise = noise[0], noise[1:]
res.append(c)
return res + noise + line
res = bytearray()
for line in map(addnoise, lines):
a = self.type2test(line)
b = binascii.a2b_base64(a)
res += b
self.assertEqual(res, self.rawdata)
# Test base64 with just invalid characters, which should return
# empty strings. TBD: shouldn't it raise an exception instead ?
self.assertEqual(binascii.a2b_base64(self.type2test(fillers)), b'')
def test_uu(self):
MAX_UU = 45
lines = []
for i in range(0, len(self.data), MAX_UU):
b = self.type2test(self.rawdata[i:i+MAX_UU])
a = binascii.b2a_uu(b)
lines.append(a)
res = bytes()
for line in lines:
a = self.type2test(line)
b = binascii.a2b_uu(a)
res += b
self.assertEqual(res, self.rawdata)
self.assertEqual(binascii.a2b_uu(b"\x7f"), b"\x00"*31)
self.assertEqual(binascii.a2b_uu(b"\x80"), b"\x00"*32)
self.assertEqual(binascii.a2b_uu(b"\xff"), b"\x00"*31)
self.assertRaises(binascii.Error, binascii.a2b_uu, b"\xff\x00")
self.assertRaises(binascii.Error, binascii.a2b_uu, b"!!!!")
self.assertRaises(binascii.Error, binascii.b2a_uu, 46*b"!")
# Issue #7701 (crash on a pydebug build)
self.assertEqual(binascii.b2a_uu(b'x'), b'!> \n')
def test_crc_hqx(self):
crc = binascii.crc_hqx(self.type2test(b"Test the CRC-32 of"), 0)
crc = binascii.crc_hqx(self.type2test(b" this string."), crc)
self.assertEqual(crc, 14290)
self.assertRaises(TypeError, binascii.crc_hqx)
self.assertRaises(TypeError, binascii.crc_hqx, self.type2test(b''))
for crc in 0, 1, 0x1234, 0x12345, 0x12345678, -1:
self.assertEqual(binascii.crc_hqx(self.type2test(b''), crc),
crc & 0xffff)
def test_crc32(self):
crc = binascii.crc32(self.type2test(b"Test the CRC-32 of"))
crc = binascii.crc32(self.type2test(b" this string."), crc)
self.assertEqual(crc, 1571220330)
self.assertRaises(TypeError, binascii.crc32)
def test_hqx(self):
# Perform binhex4 style RLE-compression
# Then calculate the hexbin4 binary-to-ASCII translation
rle = binascii.rlecode_hqx(self.data)
a = binascii.b2a_hqx(self.type2test(rle))
b, _ = binascii.a2b_hqx(self.type2test(a))
res = binascii.rledecode_hqx(b)
self.assertEqual(res, self.rawdata)
def test_hex(self):
# test hexlification
s = b'{s\005\000\000\000worldi\002\000\000\000s\005\000\000\000helloi\001\000\000\0000'
t = binascii.b2a_hex(self.type2test(s))
u = binascii.a2b_hex(self.type2test(t))
self.assertEqual(s, u)
self.assertRaises(binascii.Error, binascii.a2b_hex, t[:-1])
self.assertRaises(binascii.Error, binascii.a2b_hex, t[:-1] + b'q')
# Confirm that b2a_hex == hexlify and a2b_hex == unhexlify
self.assertEqual(binascii.hexlify(self.type2test(s)), t)
self.assertEqual(binascii.unhexlify(self.type2test(t)), u)
def test_qp(self):
binascii.a2b_qp(data=b"", header=False) # Keyword arguments allowed
# A test for SF bug 534347 (segfaults without the proper fix)
try:
binascii.a2b_qp(b"", **{1:1})
except TypeError:
pass
else:
self.fail("binascii.a2b_qp(**{1:1}) didn't raise TypeError")
self.assertEqual(binascii.a2b_qp(b"= "), b"= ")
self.assertEqual(binascii.a2b_qp(b"=="), b"=")
self.assertEqual(binascii.a2b_qp(b"=AX"), b"=AX")
self.assertRaises(TypeError, binascii.b2a_qp, foo="bar")
self.assertEqual(binascii.a2b_qp(b"=00\r\n=00"), b"\x00\r\n\x00")
self.assertEqual(
binascii.b2a_qp(b"\xff\r\n\xff\n\xff"),
b"=FF\r\n=FF\r\n=FF")
self.assertEqual(
binascii.b2a_qp(b"0"*75+b"\xff\r\n\xff\r\n\xff"),
b"0"*75+b"=\r\n=FF\r\n=FF\r\n=FF")
self.assertEqual(binascii.b2a_qp(b'\0\n'), b'=00\n')
self.assertEqual(binascii.b2a_qp(b'\0\n', quotetabs=True), b'=00\n')
self.assertEqual(binascii.b2a_qp(b'foo\tbar\t\n'), b'foo\tbar=09\n')
self.assertEqual(binascii.b2a_qp(b'foo\tbar\t\n', quotetabs=True),
b'foo=09bar=09\n')
self.assertEqual(binascii.b2a_qp(b'.'), b'=2E')
self.assertEqual(binascii.b2a_qp(b'.\n'), b'=2E\n')
self.assertEqual(binascii.b2a_qp(b'a.\n'), b'a.\n')
def test_empty_string(self):
# A test for SF bug #1022953. Make sure SystemError is not raised.
empty = self.type2test(b'')
for func in all_functions:
if func == 'crc_hqx':
# crc_hqx needs 2 arguments
binascii.crc_hqx(empty, 0)
continue
f = getattr(binascii, func)
try:
f(empty)
except Exception as err:
self.fail("{}({!r}) raises {!r}".format(func, empty, err))
def test_unicode_b2a(self):
# Unicode strings are not accepted by b2a_* functions.
for func in set(all_functions) - set(a2b_functions) | {'rledecode_hqx'}:
try:
self.assertRaises(TypeError, getattr(binascii, func), "test")
except Exception as err:
self.fail('{}("test") raises {!r}'.format(func, err))
# crc_hqx needs 2 arguments
self.assertRaises(TypeError, binascii.crc_hqx, "test", 0)
def test_unicode_a2b(self):
# Unicode strings are accepted by a2b_* functions.
MAX_ALL = 45
raw = self.rawdata[:MAX_ALL]
for fa, fb in zip(a2b_functions, b2a_functions):
if fa == 'rledecode_hqx':
# Takes non-ASCII data
continue
a2b = getattr(binascii, fa)
b2a = getattr(binascii, fb)
try:
a = b2a(self.type2test(raw))
binary_res = a2b(a)
a = a.decode('ascii')
res = a2b(a)
except Exception as err:
self.fail("{}/{} conversion raises {!r}".format(fb, fa, err))
if fb == 'b2a_hqx':
# b2a_hqx returns a tuple
res, _ = res
binary_res, _ = binary_res
self.assertEqual(res, raw, "{}/{} conversion: "
"{!r} != {!r}".format(fb, fa, res, raw))
self.assertEqual(res, binary_res)
self.assertIsInstance(res, bytes)
# non-ASCII string
self.assertRaises(ValueError, a2b, "\x80")
class ArrayBinASCIITest(BinASCIITest):
def type2test(self, s):
return array.array('B', list(s))
class BytearrayBinASCIITest(BinASCIITest):
type2test = bytearray
class MemoryviewBinASCIITest(BinASCIITest):
type2test = memoryview
if __name__ == "__main__":
unittest.main()
|
