1 /*
2 * Copyright (C) 2009 Daniel Verkamp <daniel@drv.nu>.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19 #include <stdio.h>
20 #include <string.h>
21 #include <unistd.h>
22 #include <gpxe/command.h>
23 #include <gpxe/image.h>
24 #include <gpxe/crypto.h>
25
26 #include <gpxe/md5.h>
27 #include <gpxe/sha1.h>
28
29 /**
30 * "digest" command syntax message
31 *
32 * @v argv Argument list
33 */
digest_syntax(char ** argv)34 static void digest_syntax ( char **argv ) {
35 printf ( "Usage:\n"
36 " %s <image name>\n"
37 "\n"
38 "Calculate the %s of an image\n",
39 argv[0], argv[0] );
40 }
41
42 /**
43 * The "digest" command
44 *
45 * @v argc Argument count
46 * @v argv Argument list
47 * @v digest Digest algorithm
48 * @ret rc Exit code
49 */
digest_exec(int argc,char ** argv,struct digest_algorithm * digest)50 static int digest_exec ( int argc, char **argv,
51 struct digest_algorithm *digest ) {
52 const char *image_name;
53 struct image *image;
54 uint8_t digest_ctx[digest->ctxsize];
55 uint8_t digest_out[digest->digestsize];
56 uint8_t buf[128];
57 size_t offset;
58 size_t len;
59 size_t frag_len;
60 int i;
61 unsigned j;
62
63 if ( argc < 2 ||
64 !strcmp ( argv[1], "--help" ) ||
65 !strcmp ( argv[1], "-h" ) ) {
66 digest_syntax ( argv );
67 return 1;
68 }
69
70 for ( i = 1 ; i < argc ; i++ ) {
71 image_name = argv[i];
72
73 /* find image */
74 image = find_image ( image_name );
75 if ( ! image ) {
76 printf ( "No such image: %s\n", image_name );
77 continue;
78 }
79 offset = 0;
80 len = image->len;
81
82 /* calculate digest */
83 digest_init ( digest, digest_ctx );
84 while ( len ) {
85 frag_len = len;
86 if ( frag_len > sizeof ( buf ) )
87 frag_len = sizeof ( buf );
88 copy_from_user ( buf, image->data, offset, frag_len );
89 digest_update ( digest, digest_ctx, buf, frag_len );
90 len -= frag_len;
91 offset += frag_len;
92 }
93 digest_final ( digest, digest_ctx, digest_out );
94
95 for ( j = 0 ; j < sizeof ( digest_out ) ; j++ )
96 printf ( "%02x", digest_out[j] );
97
98 printf ( " %s\n", image->name );
99 }
100
101 return 0;
102 }
103
md5sum_exec(int argc,char ** argv)104 static int md5sum_exec ( int argc, char **argv ) {
105 return digest_exec ( argc, argv, &md5_algorithm );
106 }
107
sha1sum_exec(int argc,char ** argv)108 static int sha1sum_exec ( int argc, char **argv ) {
109 return digest_exec ( argc, argv, &sha1_algorithm );
110 }
111
112 struct command md5sum_command __command = {
113 .name = "md5sum",
114 .exec = md5sum_exec,
115 };
116
117 struct command sha1sum_command __command = {
118 .name = "sha1sum",
119 .exec = sha1sum_exec,
120 };
121