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
|
/* See LICENSE file for copyright and license details. */
#include <fcntl.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "../crypt.h"
#include "../text.h"
#include "../util.h"
static int
hexdec(int c)
{
if (c >= '0' && c <= '9')
return c - '0';
else if (c >= 'A' && c <= 'F')
return c - 'A' + 10;
else if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
return -1; /* unknown character */
}
static int
mdcheckline(const char *s, uint8_t *md, size_t sz)
{
size_t i;
int b1, b2;
for (i = 0; i < sz; i++) {
if (!*s || (b1 = hexdec(*s++)) < 0)
return -1; /* invalid format */
if (!*s || (b2 = hexdec(*s++)) < 0)
return -1; /* invalid format */
if ((uint8_t)((b1 << 4) | b2) != md[i])
return 0; /* value mismatch */
}
return (i == sz) ? 1 : 0;
}
static void
mdchecklist(FILE *listfp, struct crypt_ops *ops, uint8_t *md, size_t sz,
int *formatsucks, int *noread, int *nonmatch)
{
int fd;
size_t bufsiz = 0;
int r;
char *line = NULL, *file, *p;
while (getline(&line, &bufsiz, listfp) > 0) {
if (!(file = strstr(line, " "))) {
(*formatsucks)++;
continue;
}
if ((file - line) / 2 != sz) {
(*formatsucks)++; /* checksum length mismatch */
continue;
}
*file = '\0';
file += 2;
for (p = file; *p && *p != '\n' && *p != '\r'; p++); /* strip newline */
*p = '\0';
if ((fd = open(file, O_RDONLY)) < 0) {
weprintf("open %s:", file);
(*noread)++;
continue;
}
if (cryptsum(ops, fd, file, md)) {
(*noread)++;
continue;
}
r = mdcheckline(line, md, sz);
if (r == 1) {
printf("%s: OK\n", file);
} else if (r == 0) {
printf("%s: FAILED\n", file);
(*nonmatch)++;
} else {
(*formatsucks)++;
}
close(fd);
}
free(line);
}
int
cryptcheck(int argc, char *argv[], struct crypt_ops *ops, uint8_t *md, size_t sz)
{
FILE *fp;
int formatsucks = 0, noread = 0, nonmatch = 0, ret = 0;
if (argc == 0) {
mdchecklist(stdin, ops, md, sz, &formatsucks, &noread, &nonmatch);
} else {
for (; *argv; argc--, argv++) {
if ((*argv)[0] == '-' && !(*argv)[1]) {
fp = stdin;
} else if (!(fp = fopen(*argv, "r"))) {
weprintf("fopen %s:", *argv);
ret = 1;
continue;
}
mdchecklist(fp, ops, md, sz, &formatsucks, &noread, &nonmatch);
if (fp != stdin)
fclose(fp);
}
}
if (formatsucks) {
weprintf("%d lines are improperly formatted\n", formatsucks);
ret = 1;
}
if (noread) {
weprintf("%d listed file could not be read\n", noread);
ret = 1;
}
if (nonmatch) {
weprintf("%d computed checksums did NOT match\n", nonmatch);
ret = 1;
}
return ret;
}
int
cryptmain(int argc, char *argv[], struct crypt_ops *ops, uint8_t *md, size_t sz)
{
int fd;
int ret = 0;
if (argc == 0) {
if (cryptsum(ops, 0, "<stdin>", md))
ret = 1;
else
mdprint(md, "<stdin>", sz);
} else {
for (; *argv; argc--, argv++) {
if ((*argv)[0] == '-' && !(*argv)[1]) {
*argv = "<stdin>";
fd = 0;
} else if ((fd = open(*argv, O_RDONLY)) < 0) {
weprintf("open %s:", *argv);
ret = 1;
continue;
}
if (cryptsum(ops, fd, *argv, md))
ret = 1;
else
mdprint(md, *argv, sz);
if (fd != 0)
close(fd);
}
}
return ret;
}
int
cryptsum(struct crypt_ops *ops, int fd, const char *f, uint8_t *md)
{
uint8_t buf[BUFSIZ];
ssize_t n;
ops->init(ops->s);
while ((n = read(fd, buf, sizeof(buf))) > 0)
ops->update(ops->s, buf, n);
if (n < 0) {
weprintf("%s: read error:", f);
return 1;
}
ops->sum(ops->s, md);
return 0;
}
void
mdprint(const uint8_t *md, const char *f, size_t len)
{
size_t i;
for (i = 0; i < len; i++)
printf("%02x", md[i]);
printf(" %s\n", f);
}
|
