| /* |
| * RSASSA-PSS/SHA-256 signature verification program |
| * |
| * Copyright The Mbed TLS Contributors |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| * not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #if !defined(MBEDTLS_CONFIG_FILE) |
| #include "mbedtls/config.h" |
| #else |
| #include MBEDTLS_CONFIG_FILE |
| #endif |
| |
| #if defined(MBEDTLS_PLATFORM_C) |
| #include "mbedtls/platform.h" |
| #else |
| #include <stdio.h> |
| #include <stdlib.h> |
| #define mbedtls_snprintf snprintf |
| #define mbedtls_printf printf |
| #define mbedtls_exit exit |
| #define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS |
| #define MBEDTLS_EXIT_FAILURE EXIT_FAILURE |
| #endif /* MBEDTLS_PLATFORM_C */ |
| |
| #if !defined(MBEDTLS_MD_C) || !defined(MBEDTLS_ENTROPY_C) || \ |
| !defined(MBEDTLS_RSA_C) || !defined(MBEDTLS_SHA256_C) || \ |
| !defined(MBEDTLS_PK_PARSE_C) || !defined(MBEDTLS_FS_IO) || \ |
| !defined(MBEDTLS_CTR_DRBG_C) |
| int main( void ) |
| { |
| mbedtls_printf("MBEDTLS_MD_C and/or MBEDTLS_ENTROPY_C and/or " |
| "MBEDTLS_RSA_C and/or MBEDTLS_SHA256_C and/or " |
| "MBEDTLS_PK_PARSE_C and/or MBEDTLS_FS_IO and/or " |
| "MBEDTLS_CTR_DRBG_C not defined.\n"); |
| mbedtls_exit( 0 ); |
| } |
| #else |
| |
| #include "mbedtls/md.h" |
| #include "mbedtls/pem.h" |
| #include "mbedtls/pk.h" |
| #include "mbedtls/md.h" |
| |
| #include <stdio.h> |
| #include <string.h> |
| |
| |
| int main( int argc, char *argv[] ) |
| { |
| FILE *f; |
| int ret = 1; |
| int exit_code = MBEDTLS_EXIT_FAILURE; |
| size_t i; |
| mbedtls_pk_context pk; |
| unsigned char hash[32]; |
| unsigned char buf[MBEDTLS_MPI_MAX_SIZE]; |
| char filename[512]; |
| |
| mbedtls_pk_init( &pk ); |
| |
| if( argc != 3 ) |
| { |
| mbedtls_printf( "usage: rsa_verify_pss <key_file> <filename>\n" ); |
| |
| #if defined(_WIN32) |
| mbedtls_printf( "\n" ); |
| #endif |
| |
| goto exit; |
| } |
| |
| mbedtls_printf( "\n . Reading public key from '%s'", argv[1] ); |
| fflush( stdout ); |
| |
| if( ( ret = mbedtls_pk_parse_public_keyfile( &pk, argv[1] ) ) != 0 ) |
| { |
| mbedtls_printf( " failed\n ! Could not read key from '%s'\n", argv[1] ); |
| mbedtls_printf( " ! mbedtls_pk_parse_public_keyfile returned %d\n\n", ret ); |
| goto exit; |
| } |
| |
| if( !mbedtls_pk_can_do( &pk, MBEDTLS_PK_RSA ) ) |
| { |
| mbedtls_printf( " failed\n ! Key is not an RSA key\n" ); |
| goto exit; |
| } |
| |
| mbedtls_rsa_set_padding( mbedtls_pk_rsa( pk ), MBEDTLS_RSA_PKCS_V21, MBEDTLS_MD_SHA256 ); |
| |
| /* |
| * Extract the RSA signature from the file |
| */ |
| mbedtls_snprintf( filename, 512, "%s.sig", argv[2] ); |
| |
| if( ( f = fopen( filename, "rb" ) ) == NULL ) |
| { |
| mbedtls_printf( "\n ! Could not open %s\n\n", filename ); |
| goto exit; |
| } |
| |
| i = fread( buf, 1, MBEDTLS_MPI_MAX_SIZE, f ); |
| |
| fclose( f ); |
| |
| /* |
| * Compute the SHA-256 hash of the input file and |
| * verify the signature |
| */ |
| mbedtls_printf( "\n . Verifying the RSA/SHA-256 signature" ); |
| fflush( stdout ); |
| |
| if( ( ret = mbedtls_md_file( |
| mbedtls_md_info_from_type( MBEDTLS_MD_SHA256 ), |
| argv[2], hash ) ) != 0 ) |
| { |
| mbedtls_printf( " failed\n ! Could not open or read %s\n\n", argv[2] ); |
| goto exit; |
| } |
| |
| if( ( ret = mbedtls_pk_verify( &pk, MBEDTLS_MD_SHA256, hash, 0, |
| buf, i ) ) != 0 ) |
| { |
| mbedtls_printf( " failed\n ! mbedtls_pk_verify returned %d\n\n", ret ); |
| goto exit; |
| } |
| |
| mbedtls_printf( "\n . OK (the signature is valid)\n\n" ); |
| |
| exit_code = MBEDTLS_EXIT_SUCCESS; |
| |
| exit: |
| mbedtls_pk_free( &pk ); |
| |
| #if defined(_WIN32) |
| mbedtls_printf( " + Press Enter to exit this program.\n" ); |
| fflush( stdout ); getchar(); |
| #endif |
| |
| mbedtls_exit( exit_code ); |
| } |
| #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_SHA256_C && |
| MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO */ |