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
|
/*
* Copyright (C) 2005-2007, 2010-2026 Free Software Foundation, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Simon Josefsson. */
#include <config.h>
#include "crc.h"
#include <stdio.h>
#include <string.h>
#include "macros.h"
#define MAX_ALIGNMENT 32
uint32_t trailing_unaligned_byte_hashes[32] = {
0xDFDD19BE, 0xD2D258E4, 0x3F67D485, 0xFF300DA4, 0xFC46B871,
0x6B97174C, 0x3C6873C6, 0x3DE4FDA4, 0x783A2D5F, 0x2ECC37AC,
0xFEFAD741, 0x5FFB72DF, 0xF6E6DD29, 0xCD21E04E, 0x78CAE842,
0xCFC25F71, 0x7DC85CEE, 0xC971E8DA, 0x541726C1, 0xB15FFE02,
0xFABE629D, 0x4F254C30, 0x444B083F, 0x049F6D1D, 0x2D0670E0,
0x719C83F9, 0xEB7FAABC, 0xF0E4ECEE, 0x80958327, 0xD3566178,
0xD1683190, 0x7ABB3299
};
uint32_t leading_unaligned_byte_hashes[32] = {
0xA6C6EC55, 0x10BA5C53, 0xE991A1AB, 0xD9279D86, 0xEF21C396,
0x78A4387C, 0x2F865A77, 0xAEA7587C, 0x9779C9D0, 0x914DD47A,
0xB42B53CB, 0x47D39201, 0xE53E891F, 0xB4501BA1, 0xE946965F,
0xF092BC6F, 0xA4D33D75, 0xD602ECA6, 0x107142FB, 0xD83B4AFD,
0x9B9CE2B9, 0xCF2C3E17, 0xCDE401A1, 0xE686DFE7, 0x5137E14F,
0xB309A32D, 0x2E1BB47F, 0xECA84001, 0x1F5B5472, 0x5BA21753,
0x203ACDCA, 0x48B56C22
};
uint32_t variable_alignment_variable_length_hashes[] = {
0x00000000, 0xB40BBE37, 0x98662B02, 0x062ED334, 0xFD64D7A9, 0xCA47A65D,
0x70A0B329, 0x191C96C2, 0xFECD07E0, 0x5120CD3D, 0xC886714D, 0x5416D158,
0xA9E8B882, 0x7B18C316, 0x0A7BB6E4, 0x19664DC7, 0x71A8E3C4, 0xDD7CD42A,
0x95623656, 0x2C4CFCBD, 0x7046B873, 0x7777762E, 0xAD10FF30, 0x15773DB6,
0x0515202E, 0xE0D0FC3E, 0x2F8FAC7B, 0x3A9ADE62, 0x13560288, 0x8BADEEE8,
0x4B8F79A9, 0xBDF67D65
};
int
main (void)
{
uint32_t p;
char data[MAX_ALIGNMENT * 3];
p = crc32_update_no_xor (42, "foo", 3);
if (p != 0x46e87f05)
{
printf ("cunx got %lx\n", (unsigned long) p);
return 1;
}
p = crc32_no_xor ("foo", 3);
if (p != 0x7332bc33)
{
printf ("cnx got %lx\n", (unsigned long) p);
return 1;
}
p = crc32_update (42, "foo", 3);
if (p != 0xb9a9a617)
{
printf ("cu got %lx\n", (unsigned long) p);
return 1;
}
p = crc32 ("foo", 3);
if (p != 0x8c736521)
{
printf ("c got %lx\n", (unsigned long) p);
return 1;
}
/*
* Tests for new CRC32 implementation
* The original implementation works on a byte-by-byte basis
* but new implementations may work on longer alignments.
* This test will confirm correct operation with non-aligned
* data.
*/
/* Test for trailing unaligned bytes */
for (size_t i = 0; i < MAX_ALIGNMENT; i++)
{
p = crc32_update_no_xor (0, randomb, MAX_ALIGNMENT + i);
if (p != trailing_unaligned_byte_hashes[i])
{
printf ("aligned c at %lu length %lu got %lx\n", (size_t) 0,
MAX_ALIGNMENT + i, (unsigned long) p);
return 1;
}
}
/* Test for leading unaligned bytes */
for (size_t i = 0; i < MAX_ALIGNMENT; i++)
{
p = crc32_update_no_xor (0, randomb + i, (MAX_ALIGNMENT * 2) - i);
if (p != leading_unaligned_byte_hashes[i])
{
printf ("aligned c at %lu length %lu got %lx\n", i,
(MAX_ALIGNMENT * 2) - i, (unsigned long) p);
return 1;
}
}
/* Combined test of multiple lengths at multiple alignments */
for (size_t i = 0; i < MAX_ALIGNMENT; i++)
for (size_t j = 0; j < MAX_ALIGNMENT; j++)
{
memcpy (data + i, randomb, MAX_ALIGNMENT * 2);
p = crc32_update_no_xor (0, data + i, j);
if (p != variable_alignment_variable_length_hashes[j])
{
printf ("aligned c at %lu length %lu got %lx\n", i, j,
(unsigned long) p);
return 1;
}
}
return 0;
}
|
