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
|
/*
* Copyright (C) 2003 Glenn L. McGrath
* Copyright (C) 2003-2004 Erik Andersen
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "busybox.h"
#define FLAG_SILENT 1
#define FLAG_CHECK 2
#define FLAG_WARN 4
/* This might be useful elsewhere */
static unsigned char *hash_bin_to_hex(unsigned char *hash_value,
unsigned char hash_length)
{
int x, len, max;
unsigned char *hex_value;
max = (hash_length * 2) + 2;
hex_value = xmalloc(max);
for (x = len = 0; x < hash_length; x++) {
len += snprintf(hex_value + len, max - len, "%02x", hash_value[x]);
}
return (hex_value);
}
static uint8_t *hash_file(const char *filename, uint8_t hash_algo)
{
uint8_t *hash_value_bin;
uint8_t *hash_value = NULL;
uint8_t hash_length;
int src_fd;
if (strcmp(filename, "-") == 0) {
src_fd = STDIN_FILENO;
} else {
src_fd = open(filename, O_RDONLY);
}
if (hash_algo == HASH_MD5) {
hash_length = 16;
} else {
hash_length = 20;
}
hash_value_bin = xmalloc(hash_length);
if ((src_fd != -1) && (hash_fd(src_fd, -1, hash_algo, hash_value_bin) != -2)) {
hash_value = hash_bin_to_hex(hash_value_bin, hash_length);
} else {
bb_perror_msg("%s", filename);
}
close(src_fd);
return(hash_value);
}
/* This could become a common function for md5 as well, by using md5_stream */
extern int hash_files(int argc, char **argv, const uint8_t hash_algo)
{
int return_value = EXIT_SUCCESS;
uint8_t *hash_value;
#ifdef CONFIG_FEATURE_MD5_SHA1_SUM_CHECK
unsigned int flags;
flags = bb_getopt_ulflags(argc, argv, "scw");
#endif
#ifdef CONFIG_FEATURE_MD5_SHA1_SUM_CHECK
if (!(flags & FLAG_CHECK)) {
if (flags & FLAG_SILENT) {
bb_error_msg_and_die
("the -s option is meaningful only when verifying checksums");
} else if (flags & FLAG_WARN) {
bb_error_msg_and_die
("the -w option is meaningful only when verifying checksums");
}
}
#endif
if (argc == optind) {
argv[argc++] = "-";
}
#ifdef CONFIG_FEATURE_MD5_SHA1_SUM_CHECK
if (flags & FLAG_CHECK) {
FILE *pre_computed_stream;
int count_total = 0;
int count_failed = 0;
unsigned char *file_ptr = argv[optind];
char *line;
if (optind + 1 != argc) {
bb_error_msg_and_die
("only one argument may be specified when using -c");
}
if (strcmp(file_ptr, "-") == 0) {
pre_computed_stream = stdin;
} else {
pre_computed_stream = bb_xfopen(file_ptr, "r");
}
while ((line = bb_get_chomped_line_from_file(pre_computed_stream)) != NULL) {
char *filename_ptr;
count_total++;
filename_ptr = strstr(line, " ");
if (filename_ptr == NULL) {
if (flags & FLAG_WARN) {
bb_error_msg("Invalid format");
}
free(line);
continue;
}
*filename_ptr = '\0';
filename_ptr += 2;
hash_value = hash_file(filename_ptr, hash_algo);
if (hash_value && (strcmp(hash_value, line) == 0)) {
if (!(flags & FLAG_SILENT))
printf("%s: OK\n", filename_ptr);
} else {
if (!(flags & FLAG_SILENT))
printf("%s: FAILED\n", filename_ptr);
count_failed++;
return_value = EXIT_FAILURE;
}
/* possible free(NULL) */
free(hash_value);
free(line);
}
if (count_failed && !(flags & FLAG_SILENT)) {
bb_error_msg("WARNING: %d of %d computed checksums did NOT match",
count_failed, count_total);
}
if (bb_fclose_nonstdin(pre_computed_stream) == EOF) {
bb_perror_msg_and_die("Couldnt close file %s", file_ptr);
}
} else
#endif
{
uint8_t hash_length;
if (hash_algo == HASH_MD5) {
hash_length = 16;
} else {
hash_length = 20;
}
hash_value = xmalloc(hash_length);
while (optind < argc) {
unsigned char *file_ptr = argv[optind++];
hash_value = hash_file(file_ptr, hash_algo);
if (hash_value == NULL) {
return_value = EXIT_FAILURE;
} else {
printf("%s %s\n", hash_value, file_ptr);
free(hash_value);
}
}
}
return (return_value);
}
#ifdef CONFIG_MD5SUM
extern int md5sum_main(int argc, char **argv)
{
return(hash_files(argc, argv, HASH_MD5));
}
#endif
#ifdef CONFIG_SHA1SUM
extern int sha1sum_main(int argc, char **argv)
{
return(hash_files(argc, argv, HASH_SHA1));
}
#endif
|
