1 /*
2 * Public key-based signature creation program
3 *
4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
5 * SPDX-License-Identifier: GPL-2.0
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * This file is part of mbed TLS (https://tls.mbed.org)
22 */
23
24 #if !defined(MBEDTLS_CONFIG_FILE)
25 #include "mbedtls/config.h"
26 #else
27 #include MBEDTLS_CONFIG_FILE
28 #endif
29
30 #if defined(MBEDTLS_PLATFORM_C)
31 #include "mbedtls/platform.h"
32 #else
33 #include <stdio.h>
34 #include <stdlib.h>
35 #define mbedtls_snprintf snprintf
36 #define mbedtls_printf printf
37 #define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
38 #define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
39 #endif /* MBEDTLS_PLATFORM_C */
40
41 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_ENTROPY_C) || \
42 !defined(MBEDTLS_SHA256_C) || !defined(MBEDTLS_MD_C) || \
43 !defined(MBEDTLS_PK_PARSE_C) || !defined(MBEDTLS_FS_IO) || \
44 !defined(MBEDTLS_CTR_DRBG_C)
main(void)45 int main( void )
46 {
47 mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_ENTROPY_C and/or "
48 "MBEDTLS_SHA256_C and/or MBEDTLS_MD_C and/or "
49 "MBEDTLS_PK_PARSE_C and/or MBEDTLS_FS_IO and/or "
50 "MBEDTLS_CTR_DRBG_C not defined.\n");
51 return( 0 );
52 }
53 #else
54
55 #include "mbedtls/error.h"
56 #include "mbedtls/entropy.h"
57 #include "mbedtls/ctr_drbg.h"
58 #include "mbedtls/md.h"
59 #include "mbedtls/pk.h"
60
61 #include <stdio.h>
62 #include <string.h>
63
main(int argc,char * argv[])64 int main( int argc, char *argv[] )
65 {
66 FILE *f;
67 int ret = 1;
68 int exit_code = MBEDTLS_EXIT_FAILURE;
69 mbedtls_pk_context pk;
70 mbedtls_entropy_context entropy;
71 mbedtls_ctr_drbg_context ctr_drbg;
72 unsigned char hash[32];
73 unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
74 char filename[512];
75 const char *pers = "mbedtls_pk_sign";
76 size_t olen = 0;
77
78 mbedtls_entropy_init( &entropy );
79 mbedtls_ctr_drbg_init( &ctr_drbg );
80 mbedtls_pk_init( &pk );
81
82 if( argc != 3 )
83 {
84 mbedtls_printf( "usage: mbedtls_pk_sign <key_file> <filename>\n" );
85
86 #if defined(_WIN32)
87 mbedtls_printf( "\n" );
88 #endif
89
90 goto exit;
91 }
92
93 mbedtls_printf( "\n . Seeding the random number generator..." );
94 fflush( stdout );
95
96 if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
97 (const unsigned char *) pers,
98 strlen( pers ) ) ) != 0 )
99 {
100 mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned -0x%04x\n", -ret );
101 goto exit;
102 }
103
104 mbedtls_printf( "\n . Reading private key from '%s'", argv[1] );
105 fflush( stdout );
106
107 if( ( ret = mbedtls_pk_parse_keyfile( &pk, argv[1], "" ) ) != 0 )
108 {
109 mbedtls_printf( " failed\n ! Could not parse '%s'\n", argv[1] );
110 goto exit;
111 }
112
113 /*
114 * Compute the SHA-256 hash of the input file,
115 * then calculate the signature of the hash.
116 */
117 mbedtls_printf( "\n . Generating the SHA-256 signature" );
118 fflush( stdout );
119
120 if( ( ret = mbedtls_md_file(
121 mbedtls_md_info_from_type( MBEDTLS_MD_SHA256 ),
122 argv[2], hash ) ) != 0 )
123 {
124 mbedtls_printf( " failed\n ! Could not open or read %s\n\n", argv[2] );
125 goto exit;
126 }
127
128 if( ( ret = mbedtls_pk_sign( &pk, MBEDTLS_MD_SHA256, hash, 0, buf, &olen,
129 mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
130 {
131 mbedtls_printf( " failed\n ! mbedtls_pk_sign returned -0x%04x\n", -ret );
132 goto exit;
133 }
134
135 /*
136 * Write the signature into <filename>.sig
137 */
138 mbedtls_snprintf( filename, sizeof(filename), "%s.sig", argv[2] );
139
140 if( ( f = fopen( filename, "wb+" ) ) == NULL )
141 {
142 mbedtls_printf( " failed\n ! Could not create %s\n\n", filename );
143 goto exit;
144 }
145
146 if( fwrite( buf, 1, olen, f ) != olen )
147 {
148 mbedtls_printf( "failed\n ! fwrite failed\n\n" );
149 fclose( f );
150 goto exit;
151 }
152
153 fclose( f );
154
155 mbedtls_printf( "\n . Done (created \"%s\")\n\n", filename );
156
157 exit_code = MBEDTLS_EXIT_SUCCESS;
158
159 exit:
160 mbedtls_pk_free( &pk );
161 mbedtls_ctr_drbg_free( &ctr_drbg );
162 mbedtls_entropy_free( &entropy );
163
164 #if defined(MBEDTLS_ERROR_C)
165 if( exit_code != MBEDTLS_EXIT_SUCCESS )
166 {
167 mbedtls_strerror( ret, (char *) buf, sizeof(buf) );
168 mbedtls_printf( " ! Last error was: %s\n", buf );
169 }
170 #endif
171
172 #if defined(_WIN32)
173 mbedtls_printf( " + Press Enter to exit this program.\n" );
174 fflush( stdout ); getchar();
175 #endif
176
177 return( exit_code );
178 }
179 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C &&
180 MBEDTLS_SHA256_C && MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO &&
181 MBEDTLS_CTR_DRBG_C */
182