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
|
/* $OpenBSD: keynote-sign.c,v 1.13 2002/05/27 06:29:14 deraadt Exp $ */
/*
* The author of this code is Angelos D. Keromytis (angelos@dsl.cis.upenn.edu)
*
* This code was written by Angelos D. Keromytis in Philadelphia, PA, USA,
* in April-May 1998
*
* Copyright (C) 1998, 1999 by Angelos D. Keromytis.
*
* Permission to use, copy, and modify this software with or without fee
* is hereby granted, provided that this entire notice is included in
* all copies of any software which is or includes a copy or
* modification of this software.
*
* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTY. IN PARTICULAR, THE AUTHORS MAKES NO
* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
* MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
* PURPOSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#if STDC_HEADERS
#include <string.h>
#endif /* STDC_HEADERS */
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif /* HAVE_FCNTL_H */
#if HAVE_IO_H
#include <io.h>
#elif HAVE_UNISTD_H
#include <unistd.h>
#endif /* HAVE_IO_H */
#include "header.h"
#include "keynote.h"
void
signusage(void)
{
fprintf(stderr, "Arguments:\n");
fprintf(stderr, "\t[-v] <AlgorithmName> <AssertionFile> "
"<PrivateKeyFile> [<print-offset>] [<print-length>]\n");
}
void
keynote_sign(int argc, char *argv[])
{
int begin = SIG_PRINT_OFFSET, prlen = SIG_PRINT_LENGTH;
char *buf, *buf2, *sig, *algname;
int fd, flg = 0, buflen;
struct stat sb;
if ((argc != 4) &&
(argc != 5) &&
(argc != 6) &&
(argc != 7))
{
signusage();
exit(1);
}
if (!strcmp("-v", argv[1]))
flg = 1;
if (argc > 4 + flg)
{
begin = atoi(argv[4 + flg]);
if (begin <= -1)
{
fprintf(stderr, "Erroneous value for print-offset parameter.\n");
exit(1);
}
}
if (argc > 5 + flg)
{
prlen = atoi(argv[5 + flg]);
if (prlen <= 0)
{
fprintf(stderr, "Erroneous value for print-length parameter.\n");
exit(1);
}
}
/* Fix algorithm name */
if (argv[1 + flg][strlen(argv[1 + flg]) - 1] != ':')
{
int len = strlen(argv[1 + flg]) + 2;
fprintf(stderr, "Algorithm name [%s] should be terminated with a "
"colon, fixing.\n", argv[1 + flg]);
algname = (char *) calloc(len, sizeof(char));
if (algname == (char *) NULL)
{
perror("calloc()");
exit(1);
}
strlcpy(algname, argv[1 + flg], len);
algname[strlen(algname)] = ':';
}
else
algname = argv[1 + flg];
/* Read assertion */
fd = open(argv[2 + flg], O_RDONLY, 0);
if (fd < 0)
{
perror(argv[2 + flg]);
exit(1);
}
if (fstat(fd, &sb) < 0)
{
perror("fstat()");
exit(1);
}
if (sb.st_size == 0) /* Paranoid */
{
fprintf(stderr, "Error: zero-sized assertion-file.\n");
exit(1);
}
buflen = sb.st_size + 1;
buf = (char *) calloc(buflen, sizeof(char));
if (buf == (char *) NULL)
{
perror("calloc()");
exit(1);
}
if (read(fd, buf, buflen - 1) < 0)
{
perror("read()");
exit(1);
}
close(fd);
/* Read private key file */
fd = open(argv[3 + flg], O_RDONLY, 0);
if (fd < 0)
{
perror(argv[3 + flg]);
exit(1);
}
if (fstat(fd, &sb) < 0)
{
perror("fstat()");
exit(1);
}
if (sb.st_size == 0) /* Paranoid */
{
fprintf(stderr, "Illegal key-file size 0\n");
exit(1);
}
buf2 = (char *) calloc(sb.st_size + 1, sizeof(char));
if (buf2 == (char *) NULL)
{
perror("calloc()");
exit(1);
}
if (read(fd, buf2, sb.st_size) < 0)
{
perror("read()");
exit(1);
}
close(fd);
sig = kn_sign_assertion(buf, buflen, buf2, algname, flg);
/* Free buffers */
free(buf);
free(buf2);
if (sig == (char *) NULL)
{
switch (keynote_errno)
{
case ERROR_MEMORY:
fprintf(stderr, "Out of memory while creating signature.\n");
break;
case ERROR_SYNTAX:
fprintf(stderr, "Bad assertion or algorithm format, or "
"unsupported algorithm while creating signature.\n");
break;
default:
fprintf(stderr, "Unknown error while creating signature.\n");
}
exit(1);
}
/* Print signature string */
print_key(stdout, "", sig, begin, prlen);
free(sig); /* Just a reminder that the result is malloc'ed */
exit(0);
}
|
