1 /*
2 * RSASSA-PSS/SHA-256 signature verification 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 #define mbedtls_snprintf snprintf
33 #define mbedtls_printf printf
34 #endif
35
36 #if !defined(MBEDTLS_MD_C) || !defined(MBEDTLS_ENTROPY_C) || \
37 !defined(MBEDTLS_RSA_C) || !defined(MBEDTLS_SHA256_C) || \
38 !defined(MBEDTLS_PK_PARSE_C) || !defined(MBEDTLS_FS_IO) || \
39 !defined(MBEDTLS_CTR_DRBG_C)
main(void)40 int main( void )
41 {
42 mbedtls_printf("MBEDTLS_MD_C and/or MBEDTLS_ENTROPY_C and/or "
43 "MBEDTLS_RSA_C and/or MBEDTLS_SHA256_C and/or "
44 "MBEDTLS_PK_PARSE_C and/or MBEDTLS_FS_IO and/or "
45 "MBEDTLS_CTR_DRBG_C not defined.\n");
46 return( 0 );
47 }
48 #else
49
50 #include "mbedtls/md.h"
51 #include "mbedtls/pem.h"
52 #include "mbedtls/pk.h"
53 #include "mbedtls/md.h"
54 #include "mbedtls/x509.h"
55
56 #include <stdio.h>
57 #include <string.h>
58
main(int argc,char * argv[])59 int main( int argc, char *argv[] )
60 {
61 FILE *f;
62 int ret = 1;
63 size_t i;
64 mbedtls_pk_context pk;
65 unsigned char hash[32];
66 unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
67 char filename[512];
68
69 mbedtls_pk_init( &pk );
70
71 if( argc != 3 )
72 {
73 mbedtls_printf( "usage: rsa_verify_pss <key_file> <filename>\n" );
74
75 #if defined(_WIN32)
76 mbedtls_printf( "\n" );
77 #endif
78
79 goto exit;
80 }
81
82 mbedtls_printf( "\n . Reading public key from '%s'", argv[1] );
83 fflush( stdout );
84
85 if( ( ret = mbedtls_pk_parse_public_keyfile( &pk, argv[1] ) ) != 0 )
86 {
87 mbedtls_printf( " failed\n ! Could not read key from '%s'\n", argv[1] );
88 mbedtls_printf( " ! mbedtls_pk_parse_public_keyfile returned %d\n\n", ret );
89 goto exit;
90 }
91
92 if( !mbedtls_pk_can_do( &pk, MBEDTLS_PK_RSA ) )
93 {
94 ret = 1;
95 mbedtls_printf( " failed\n ! Key is not an RSA key\n" );
96 goto exit;
97 }
98
99 mbedtls_rsa_set_padding( mbedtls_pk_rsa( pk ), MBEDTLS_RSA_PKCS_V21, MBEDTLS_MD_SHA256 );
100
101 /*
102 * Extract the RSA signature from the file
103 */
104 ret = 1;
105 mbedtls_snprintf( filename, 512, "%s.sig", argv[2] );
106
107 if( ( f = fopen( filename, "rb" ) ) == NULL )
108 {
109 mbedtls_printf( "\n ! Could not open %s\n\n", filename );
110 goto exit;
111 }
112
113
114 i = fread( buf, 1, MBEDTLS_MPI_MAX_SIZE, f );
115
116 fclose( f );
117
118 /*
119 * Compute the SHA-256 hash of the input file and
120 * verify the signature
121 */
122 mbedtls_printf( "\n . Verifying the RSA/SHA-256 signature" );
123 fflush( stdout );
124
125 if( ( ret = mbedtls_md_file(
126 mbedtls_md_info_from_type( MBEDTLS_MD_SHA256 ),
127 argv[2], hash ) ) != 0 )
128 {
129 mbedtls_printf( " failed\n ! Could not open or read %s\n\n", argv[2] );
130 goto exit;
131 }
132
133 if( ( ret = mbedtls_pk_verify( &pk, MBEDTLS_MD_SHA256, hash, 0,
134 buf, i ) ) != 0 )
135 {
136 mbedtls_printf( " failed\n ! mbedtls_pk_verify returned %d\n\n", ret );
137 goto exit;
138 }
139
140 mbedtls_printf( "\n . OK (the signature is valid)\n\n" );
141
142 ret = 0;
143
144 exit:
145 mbedtls_pk_free( &pk );
146
147 #if defined(_WIN32)
148 mbedtls_printf( " + Press Enter to exit this program.\n" );
149 fflush( stdout ); getchar();
150 #endif
151
152 return( ret );
153 }
154 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_SHA256_C &&
155 MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO */
156
