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
|
// Copyright 2012 Aaron Jacobs. All Rights Reserved.
// Author: aaronjjacobs@gmail.com (Aaron Jacobs)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package common_test
import (
"testing"
"github.com/jacobsa/crypto/common"
. "github.com/jacobsa/oglematchers"
. "github.com/jacobsa/ogletest"
)
func TestXor(t *testing.T) { RunTests(t) }
////////////////////////////////////////////////////////////////////////
// Helpers
////////////////////////////////////////////////////////////////////////
type XorTest struct{}
func init() { RegisterTestSuite(&XorTest{}) }
func xorWithResult(a []byte, b []byte) (result []byte) {
result = make([]byte, len(a))
common.Xor(result, a, b)
return
}
////////////////////////////////////////////////////////////////////////
// Tests
////////////////////////////////////////////////////////////////////////
func (t *XorTest) LengthsNotEqual() {
a := []byte{0x00}
b := []byte{0x00, 0x11}
f := func() { xorWithResult(a, b) }
ExpectThat(f, Panics(HasSubstr("length")))
}
func (t *XorTest) NilBuffers() {
a := []byte(nil)
b := []byte(nil)
result := xorWithResult(a, b)
AssertNe(nil, result)
ExpectThat(result, DeepEquals([]byte{}))
}
func (t *XorTest) EmptyBuffers() {
a := []byte{}
b := []byte{}
result := xorWithResult(a, b)
AssertNe(nil, result)
ExpectThat(result, DeepEquals([]byte{}))
}
func (t *XorTest) OneByteBuffers() {
var a, b, expected []byte
a = []byte{fromBinary("00000000")}
b = []byte{fromBinary("00000000")}
expected = []byte{fromBinary("00000000")}
ExpectThat(xorWithResult(a, b), DeepEquals(expected))
a = []byte{fromBinary("11111111")}
b = []byte{fromBinary("11111111")}
expected = []byte{fromBinary("00000000")}
ExpectThat(xorWithResult(a, b), DeepEquals(expected))
a = []byte{fromBinary("11111111")}
b = []byte{fromBinary("00000000")}
expected = []byte{fromBinary("11111111")}
ExpectThat(xorWithResult(a, b), DeepEquals(expected))
a = []byte{fromBinary("00000000")}
b = []byte{fromBinary("11111111")}
expected = []byte{fromBinary("11111111")}
ExpectThat(xorWithResult(a, b), DeepEquals(expected))
a = []byte{fromBinary("10100100")}
b = []byte{fromBinary("11111111")}
expected = []byte{fromBinary("01011011")}
ExpectThat(xorWithResult(a, b), DeepEquals(expected))
}
func (t *XorTest) MultiByteBuffers() {
var a, b, expected []byte
a = []byte{fromBinary("00000000"), fromBinary("00000000")}
b = []byte{fromBinary("00000000"), fromBinary("00000000")}
expected = []byte{fromBinary("00000000"), fromBinary("00000000")}
ExpectThat(xorWithResult(a, b), DeepEquals(expected))
a = []byte{fromBinary("11111111"), fromBinary("11111111")}
b = []byte{fromBinary("11111111"), fromBinary("11111111")}
expected = []byte{fromBinary("00000000"), fromBinary("00000000")}
ExpectThat(xorWithResult(a, b), DeepEquals(expected))
a = []byte{fromBinary("00000000"), fromBinary("11111111")}
b = []byte{fromBinary("11111111"), fromBinary("00000000")}
expected = []byte{fromBinary("11111111"), fromBinary("11111111")}
ExpectThat(xorWithResult(a, b), DeepEquals(expected))
}
|
