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
|
/* rzxcheck.c: Check the signature on an RZX file
Copyright (c) 2002-2003 Philip Kendall
Copyright (c) 2015 Sergio Baldovi
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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Author contact information:
E-mail: philip-fuse@shadowmagic.org.uk
*/
#include <config.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <libspectrum.h>
#include "utils.h"
#define PROGRAM_NAME "rzxcheck"
char *progname; /* argv[0] */
static void
show_version( void )
{
printf(
PROGRAM_NAME " (" PACKAGE ") " PACKAGE_VERSION "\n"
"Copyright (c) 2002-2003 Philip Kendall\n"
"License GPLv2+: GNU GPL version 2 or later "
"<http://gnu.org/licenses/gpl.html>\n"
"This is free software: you are free to change and redistribute it.\n"
"There is NO WARRANTY, to the extent permitted by law.\n" );
}
static void
show_help( void )
{
printf(
"Usage: %s [OPTION] <rzxfile>\n"
"Verifies the digital signature found in a ZX Spectrum RZX file.\n"
"\n"
"Options:\n"
" -h, --help Display this help and exit.\n"
" -V, --version Output version information and exit.\n"
"\n"
"Report %s bugs to <%s>\n"
"%s home page: <%s>\n"
"For complete documentation, see the manual page of %s.\n",
progname,
PROGRAM_NAME, PACKAGE_BUGREPORT, PACKAGE_NAME, PACKAGE_URL, PROGRAM_NAME
);
}
int
main( int argc, char **argv )
{
unsigned char *buffer; size_t length;
const char *rzxfile;
libspectrum_rzx *rzx;
libspectrum_error error;
libspectrum_dword keyid = 0;
libspectrum_signature signature;
struct rzx_key *key;
int c;
int bad_option = 0;
struct option long_options[] = {
{ "version", 0, NULL, 'V' },
{ "help", 0, NULL, 'h' },
{ 0, 0, 0, 0 }
};
progname = argv[0];
while( ( c = getopt_long( argc, argv, "Vh", long_options, NULL ) ) != -1 ) {
switch( c ) {
case 'V': show_version(); exit( 0 );
case 'h': show_help(); exit( 0 );
case '?':
/* getopt prints an error message to stderr */
bad_option = 1;
break;
default:
bad_option = 1;
fprintf( stderr, "%s: unknown option `%c'\n", progname, (char) c );
break;
}
}
argc -= optind;
argv += optind;
if( bad_option ) {
fprintf( stderr, "Try `%s --help' for more information.\n", progname );
return bad_option;
}
if( argc < 1 ) {
fprintf( stderr, "%s: usage: %s <rzxfile>\n", progname, progname );
fprintf( stderr, "Try `%s --help' for more information.\n", progname );
return 2;
}
if( init_libspectrum() ) return 16;
rzxfile = argv[0];
rzx = libspectrum_rzx_alloc();
if( read_file( rzxfile, &buffer, &length ) ) return 16;
if( libspectrum_rzx_read( rzx, buffer, length ) ) {
free( buffer );
return 16;
}
keyid = libspectrum_rzx_get_keyid( rzx );
if( !keyid ) {
printf( "%s: no key ID found in '%s'\n", progname, rzxfile );
libspectrum_rzx_free( rzx );
free( buffer );
return 16;
}
for( key = known_keys; key->id; key++ )
if( keyid == key->id ) break;
if( !key->id ) {
printf( "%s: don't know anything about key ID %08x\n", progname,
keyid );
libspectrum_rzx_free( rzx );
free( buffer );
return 16;
}
error = libspectrum_rzx_get_signature( rzx, &signature );
if( error ) {
libspectrum_rzx_free( rzx );
free( buffer );
return 16;
}
error = libspectrum_verify_signature( &signature, &( key->key ) );
if( error && error != LIBSPECTRUM_ERROR_SIGNATURE ) {
libspectrum_signature_free( &signature );
libspectrum_rzx_free( rzx );
free( buffer );
return 16;
}
free( buffer );
libspectrum_rzx_free( rzx );
libspectrum_signature_free( &signature );
if( error == LIBSPECTRUM_ERROR_SIGNATURE ) {
printf( "%s: BAD signature with key %08x (%s) in '%s'\n", progname,
key->id, key->description, rzxfile );
return 1;
} else {
printf( "%s: good signature with key %08x (%s) in '%s'\n", progname,
key->id, key->description, rzxfile );
return 0;
}
}
|
