1 /*
2 * RSASSA-PSS/SHA-256 signature creation program
3 *
4 * Copyright The Mbed TLS Contributors
5 * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
6 *
7 * This file is provided under the Apache License 2.0, or the
8 * GNU General Public License v2.0 or later.
9 *
10 * **********
11 * Apache License 2.0:
12 *
13 * Licensed under the Apache License, Version 2.0 (the "License"); you may
14 * not use this file except in compliance with the License.
15 * You may obtain a copy of the License at
16 *
17 * http://www.apache.org/licenses/LICENSE-2.0
18 *
19 * Unless required by applicable law or agreed to in writing, software
20 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
21 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
22 * See the License for the specific language governing permissions and
23 * limitations under the License.
24 *
25 * **********
26 *
27 * **********
28 * GNU General Public License v2.0 or later:
29 *
30 * This program is free software; you can redistribute it and/or modify
31 * it under the terms of the GNU General Public License as published by
32 * the Free Software Foundation; either version 2 of the License, or
33 * (at your option) any later version.
34 *
35 * This program is distributed in the hope that it will be useful,
36 * but WITHOUT ANY WARRANTY; without even the implied warranty of
37 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
38 * GNU General Public License for more details.
39 *
40 * You should have received a copy of the GNU General Public License along
41 * with this program; if not, write to the Free Software Foundation, Inc.,
42 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
43 *
44 * **********
45 */
46
47 #if !defined(MBEDTLS_CONFIG_FILE)
48 #include "mbedtls/config.h"
49 #else
50 #include MBEDTLS_CONFIG_FILE
51 #endif
52
53 #if defined(MBEDTLS_PLATFORM_C)
54 #include "mbedtls/platform.h"
55 #else
56 #include <stdio.h>
57 #include <stdlib.h>
58 #define mbedtls_snprintf snprintf
59 #define mbedtls_printf printf
60 #define mbedtls_exit exit
61 #define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
62 #define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
63 #endif /* MBEDTLS_PLATFORM_C */
64
65 #if !defined(MBEDTLS_MD_C) || !defined(MBEDTLS_ENTROPY_C) || \
66 !defined(MBEDTLS_RSA_C) || !defined(MBEDTLS_SHA256_C) || \
67 !defined(MBEDTLS_PK_PARSE_C) || !defined(MBEDTLS_FS_IO) || \
68 !defined(MBEDTLS_CTR_DRBG_C)
main(void)69 int main( void )
70 {
71 mbedtls_printf("MBEDTLS_MD_C and/or MBEDTLS_ENTROPY_C and/or "
72 "MBEDTLS_RSA_C and/or MBEDTLS_SHA256_C and/or "
73 "MBEDTLS_PK_PARSE_C and/or MBEDTLS_FS_IO and/or "
74 "MBEDTLS_CTR_DRBG_C not defined.\n");
75 mbedtls_exit( 0 );
76 }
77 #else
78
79 #include "mbedtls/entropy.h"
80 #include "mbedtls/ctr_drbg.h"
81 #include "mbedtls/md.h"
82 #include "mbedtls/rsa.h"
83 #include "mbedtls/x509.h"
84
85 #include <stdio.h>
86 #include <string.h>
87
88
main(int argc,char * argv[])89 int main( int argc, char *argv[] )
90 {
91 FILE *f;
92 int ret = 1;
93 int exit_code = MBEDTLS_EXIT_FAILURE;
94 mbedtls_pk_context pk;
95 mbedtls_entropy_context entropy;
96 mbedtls_ctr_drbg_context ctr_drbg;
97 unsigned char hash[32];
98 unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
99 char filename[512];
100 const char *pers = "rsa_sign_pss";
101 size_t olen = 0;
102
103 mbedtls_entropy_init( &entropy );
104 mbedtls_pk_init( &pk );
105 mbedtls_ctr_drbg_init( &ctr_drbg );
106
107 if( argc != 3 )
108 {
109 mbedtls_printf( "usage: rsa_sign_pss <key_file> <filename>\n" );
110
111 #if defined(_WIN32)
112 mbedtls_printf( "\n" );
113 #endif
114
115 goto exit;
116 }
117
118 mbedtls_printf( "\n . Seeding the random number generator..." );
119 fflush( stdout );
120
121 if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
122 (const unsigned char *) pers,
123 strlen( pers ) ) ) != 0 )
124 {
125 mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret );
126 goto exit;
127 }
128
129 mbedtls_printf( "\n . Reading private key from '%s'", argv[1] );
130 fflush( stdout );
131
132 if( ( ret = mbedtls_pk_parse_keyfile( &pk, argv[1], "" ) ) != 0 )
133 {
134 mbedtls_printf( " failed\n ! Could not read key from '%s'\n", argv[1] );
135 mbedtls_printf( " ! mbedtls_pk_parse_public_keyfile returned %d\n\n", ret );
136 goto exit;
137 }
138
139 if( !mbedtls_pk_can_do( &pk, MBEDTLS_PK_RSA ) )
140 {
141 mbedtls_printf( " failed\n ! Key is not an RSA key\n" );
142 goto exit;
143 }
144
145 mbedtls_rsa_set_padding( mbedtls_pk_rsa( pk ), MBEDTLS_RSA_PKCS_V21, MBEDTLS_MD_SHA256 );
146
147 /*
148 * Compute the SHA-256 hash of the input file,
149 * then calculate the RSA signature of the hash.
150 */
151 mbedtls_printf( "\n . Generating the RSA/SHA-256 signature" );
152 fflush( stdout );
153
154 if( ( ret = mbedtls_md_file(
155 mbedtls_md_info_from_type( MBEDTLS_MD_SHA256 ),
156 argv[2], hash ) ) != 0 )
157 {
158 mbedtls_printf( " failed\n ! Could not open or read %s\n\n", argv[2] );
159 goto exit;
160 }
161
162 if( ( ret = mbedtls_pk_sign( &pk, MBEDTLS_MD_SHA256, hash, 0, buf, &olen,
163 mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
164 {
165 mbedtls_printf( " failed\n ! mbedtls_pk_sign returned %d\n\n", ret );
166 goto exit;
167 }
168
169 /*
170 * Write the signature into <filename>.sig
171 */
172 mbedtls_snprintf( filename, 512, "%s.sig", argv[2] );
173
174 if( ( f = fopen( filename, "wb+" ) ) == NULL )
175 {
176 mbedtls_printf( " failed\n ! Could not create %s\n\n", filename );
177 goto exit;
178 }
179
180 if( fwrite( buf, 1, olen, f ) != olen )
181 {
182 mbedtls_printf( "failed\n ! fwrite failed\n\n" );
183 fclose( f );
184 goto exit;
185 }
186
187 fclose( f );
188
189 mbedtls_printf( "\n . Done (created \"%s\")\n\n", filename );
190
191 exit_code = MBEDTLS_EXIT_SUCCESS;
192
193 exit:
194 mbedtls_pk_free( &pk );
195 mbedtls_ctr_drbg_free( &ctr_drbg );
196 mbedtls_entropy_free( &entropy );
197
198 #if defined(_WIN32)
199 mbedtls_printf( " + Press Enter to exit this program.\n" );
200 fflush( stdout ); getchar();
201 #endif
202
203 mbedtls_exit( exit_code );
204 }
205 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C && MBEDTLS_RSA_C &&
206 MBEDTLS_SHA256_C && MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO &&
207 MBEDTLS_CTR_DRBG_C */
208