1 /*
2 * RSASSA-PSS/SHA-256 signature creation program
3 *
4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
5 * SPDX-License-Identifier: Apache-2.0
6 *
7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
8 * not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 *
19 * This file is part of mbed TLS (https://tls.mbed.org)
20 */
21
22 #if !defined(MBEDTLS_CONFIG_FILE)
23 #include "mbedtls/config.h"
24 #else
25 #include MBEDTLS_CONFIG_FILE
26 #endif
27
28 #if defined(MBEDTLS_PLATFORM_C)
29 #include "mbedtls/platform.h"
30 #else
31 #include <stdio.h>
32 #include <stdlib.h>
33 #define mbedtls_snprintf snprintf
34 #define mbedtls_printf printf
35 #define mbedtls_exit exit
36 #define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
37 #define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
38 #endif /* MBEDTLS_PLATFORM_C */
39
40 #if !defined(MBEDTLS_MD_C) || !defined(MBEDTLS_ENTROPY_C) || \
41 !defined(MBEDTLS_RSA_C) || !defined(MBEDTLS_SHA256_C) || \
42 !defined(MBEDTLS_PK_PARSE_C) || !defined(MBEDTLS_FS_IO) || \
43 !defined(MBEDTLS_CTR_DRBG_C)
main(void)44 int main( void )
45 {
46 mbedtls_printf("MBEDTLS_MD_C and/or MBEDTLS_ENTROPY_C and/or "
47 "MBEDTLS_RSA_C and/or MBEDTLS_SHA256_C and/or "
48 "MBEDTLS_PK_PARSE_C and/or MBEDTLS_FS_IO and/or "
49 "MBEDTLS_CTR_DRBG_C not defined.\n");
50 return( 0 );
51 }
52 #else
53
54 #include "mbedtls/entropy.h"
55 #include "mbedtls/ctr_drbg.h"
56 #include "mbedtls/md.h"
57 #include "mbedtls/rsa.h"
58 #include "mbedtls/md.h"
59 #include "mbedtls/x509.h"
60
61 #include <stdio.h>
62 #include <string.h>
63
64 #if defined(MBEDTLS_CHECK_PARAMS)
65 #include "mbedtls/platform_util.h"
mbedtls_param_failed(const char * failure_condition,const char * file,int line)66 void mbedtls_param_failed( const char *failure_condition,
67 const char *file,
68 int line )
69 {
70 mbedtls_printf( "%s:%i: Input param failed - %s\n",
71 file, line, failure_condition );
72 mbedtls_exit( MBEDTLS_EXIT_FAILURE );
73 }
74 #endif
75
main(int argc,char * argv[])76 int main( int argc, char *argv[] )
77 {
78 FILE *f;
79 int ret = 1;
80 int exit_code = MBEDTLS_EXIT_FAILURE;
81 mbedtls_pk_context pk;
82 mbedtls_entropy_context entropy;
83 mbedtls_ctr_drbg_context ctr_drbg;
84 unsigned char hash[32];
85 unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
86 char filename[512];
87 const char *pers = "rsa_sign_pss";
88 size_t olen = 0;
89
90 mbedtls_entropy_init( &entropy );
91 mbedtls_pk_init( &pk );
92 mbedtls_ctr_drbg_init( &ctr_drbg );
93
94 if( argc != 3 )
95 {
96 mbedtls_printf( "usage: rsa_sign_pss <key_file> <filename>\n" );
97
98 #if defined(_WIN32)
99 mbedtls_printf( "\n" );
100 #endif
101
102 goto exit;
103 }
104
105 mbedtls_printf( "\n . Seeding the random number generator..." );
106 fflush( stdout );
107
108 if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
109 (const unsigned char *) pers,
110 strlen( pers ) ) ) != 0 )
111 {
112 mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret );
113 goto exit;
114 }
115
116 mbedtls_printf( "\n . Reading private key from '%s'", argv[1] );
117 fflush( stdout );
118
119 if( ( ret = mbedtls_pk_parse_keyfile( &pk, argv[1], "" ) ) != 0 )
120 {
121 mbedtls_printf( " failed\n ! Could not read key from '%s'\n", argv[1] );
122 mbedtls_printf( " ! mbedtls_pk_parse_public_keyfile returned %d\n\n", ret );
123 goto exit;
124 }
125
126 if( !mbedtls_pk_can_do( &pk, MBEDTLS_PK_RSA ) )
127 {
128 mbedtls_printf( " failed\n ! Key is not an RSA key\n" );
129 goto exit;
130 }
131
132 mbedtls_rsa_set_padding( mbedtls_pk_rsa( pk ), MBEDTLS_RSA_PKCS_V21, MBEDTLS_MD_SHA256 );
133
134 /*
135 * Compute the SHA-256 hash of the input file,
136 * then calculate the RSA signature of the hash.
137 */
138 mbedtls_printf( "\n . Generating the RSA/SHA-256 signature" );
139 fflush( stdout );
140
141 if( ( ret = mbedtls_md_file(
142 mbedtls_md_info_from_type( MBEDTLS_MD_SHA256 ),
143 argv[2], hash ) ) != 0 )
144 {
145 mbedtls_printf( " failed\n ! Could not open or read %s\n\n", argv[2] );
146 goto exit;
147 }
148
149 if( ( ret = mbedtls_pk_sign( &pk, MBEDTLS_MD_SHA256, hash, 0, buf, &olen,
150 mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
151 {
152 mbedtls_printf( " failed\n ! mbedtls_pk_sign returned %d\n\n", ret );
153 goto exit;
154 }
155
156 /*
157 * Write the signature into <filename>.sig
158 */
159 mbedtls_snprintf( filename, 512, "%s.sig", argv[2] );
160
161 if( ( f = fopen( filename, "wb+" ) ) == NULL )
162 {
163 mbedtls_printf( " failed\n ! Could not create %s\n\n", filename );
164 goto exit;
165 }
166
167 if( fwrite( buf, 1, olen, f ) != olen )
168 {
169 mbedtls_printf( "failed\n ! fwrite failed\n\n" );
170 fclose( f );
171 goto exit;
172 }
173
174 fclose( f );
175
176 mbedtls_printf( "\n . Done (created \"%s\")\n\n", filename );
177
178 exit_code = MBEDTLS_EXIT_SUCCESS;
179
180 exit:
181 mbedtls_pk_free( &pk );
182 mbedtls_ctr_drbg_free( &ctr_drbg );
183 mbedtls_entropy_free( &entropy );
184
185 #if defined(_WIN32)
186 mbedtls_printf( " + Press Enter to exit this program.\n" );
187 fflush( stdout ); getchar();
188 #endif
189
190 return( exit_code );
191 }
192 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C && MBEDTLS_RSA_C &&
193 MBEDTLS_SHA256_C && MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO &&
194 MBEDTLS_CTR_DRBG_C */
195