2 * RSASSA-PSS/SHA-256 signature verification program
4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
5 * SPDX-License-Identifier: Apache-2.0
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
11 * http://www.apache.org/licenses/LICENSE-2.0
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.
19 * This file is part of mbed TLS (https://tls.mbed.org)
22 #if !defined(MBEDTLS_CONFIG_FILE)
23 #include "mbedtls/config.h"
25 #include MBEDTLS_CONFIG_FILE
28 #if defined(MBEDTLS_PLATFORM_C)
29 #include "mbedtls/platform.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 */
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)
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");
54 #include "mbedtls/md.h"
55 #include "mbedtls/pem.h"
56 #include "mbedtls/pk.h"
57 #include "mbedtls/md.h"
58 #include "mbedtls/x509.h"
63 #if defined(MBEDTLS_CHECK_PARAMS)
64 #include "mbedtls/platform_util.h"
65 void mbedtls_param_failed( const char *failure_condition,
69 mbedtls_printf( "%s:%i: Input param failed - %s\n",
70 file, line, failure_condition );
71 mbedtls_exit( MBEDTLS_EXIT_FAILURE );
75 int main( int argc, char *argv[] )
79 int exit_code = MBEDTLS_EXIT_FAILURE;
81 mbedtls_pk_context pk;
82 unsigned char hash[32];
83 unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
86 mbedtls_pk_init( &pk );
90 mbedtls_printf( "usage: rsa_verify_pss <key_file> <filename>\n" );
93 mbedtls_printf( "\n" );
99 mbedtls_printf( "\n . Reading public key from '%s'", argv[1] );
102 if( ( ret = mbedtls_pk_parse_public_keyfile( &pk, argv[1] ) ) != 0 )
104 mbedtls_printf( " failed\n ! Could not read key from '%s'\n", argv[1] );
105 mbedtls_printf( " ! mbedtls_pk_parse_public_keyfile returned %d\n\n", ret );
109 if( !mbedtls_pk_can_do( &pk, MBEDTLS_PK_RSA ) )
111 mbedtls_printf( " failed\n ! Key is not an RSA key\n" );
115 mbedtls_rsa_set_padding( mbedtls_pk_rsa( pk ), MBEDTLS_RSA_PKCS_V21, MBEDTLS_MD_SHA256 );
118 * Extract the RSA signature from the file
120 mbedtls_snprintf( filename, 512, "%s.sig", argv[2] );
122 if( ( f = fopen( filename, "rb" ) ) == NULL )
124 mbedtls_printf( "\n ! Could not open %s\n\n", filename );
129 i = fread( buf, 1, MBEDTLS_MPI_MAX_SIZE, f );
134 * Compute the SHA-256 hash of the input file and
135 * verify the signature
137 mbedtls_printf( "\n . Verifying the RSA/SHA-256 signature" );
140 if( ( ret = mbedtls_md_file(
141 mbedtls_md_info_from_type( MBEDTLS_MD_SHA256 ),
142 argv[2], hash ) ) != 0 )
144 mbedtls_printf( " failed\n ! Could not open or read %s\n\n", argv[2] );
148 if( ( ret = mbedtls_pk_verify( &pk, MBEDTLS_MD_SHA256, hash, 0,
151 mbedtls_printf( " failed\n ! mbedtls_pk_verify returned %d\n\n", ret );
155 mbedtls_printf( "\n . OK (the signature is valid)\n\n" );
157 exit_code = MBEDTLS_EXIT_SUCCESS;
160 mbedtls_pk_free( &pk );
163 mbedtls_printf( " + Press Enter to exit this program.\n" );
164 fflush( stdout ); getchar();
169 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_SHA256_C &&
170 MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO */