| /* |
| * RSA/SHA-256 signature creation program |
| * |
| * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved |
| * 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. |
| * |
| * This file is part of mbed TLS (https://tls.mbed.org) |
| */ |
| |
| #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_fprintf fprintf |
| #define mbedtls_printf printf |
| #define mbedtls_snprintf snprintf |
| #define mbedtls_exit exit |
| #define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS |
| #define MBEDTLS_EXIT_FAILURE EXIT_FAILURE |
| #endif /* MBEDTLS_PLATFORM_C */ |
| |
| #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_RSA_C) || \ |
| !defined(MBEDTLS_SHA256_C) || !defined(MBEDTLS_MD_C) || \ |
| !defined(MBEDTLS_FS_IO) |
| int main( void ) |
| { |
| mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_RSA_C and/or " |
| "MBEDTLS_MD_C and/or " |
| "MBEDTLS_SHA256_C and/or MBEDTLS_FS_IO not defined.\n"); |
| mbedtls_exit( 0 ); |
| } |
| #else |
| |
| #include "mbedtls/rsa.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_rsa_context rsa; |
| unsigned char hash[32]; |
| unsigned char buf[MBEDTLS_MPI_MAX_SIZE]; |
| char filename[512]; |
| mbedtls_mpi N, P, Q, D, E, DP, DQ, QP; |
| |
| mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, 0 ); |
| |
| mbedtls_mpi_init( &N ); mbedtls_mpi_init( &P ); mbedtls_mpi_init( &Q ); |
| mbedtls_mpi_init( &D ); mbedtls_mpi_init( &E ); mbedtls_mpi_init( &DP ); |
| mbedtls_mpi_init( &DQ ); mbedtls_mpi_init( &QP ); |
| |
| if( argc != 2 ) |
| { |
| mbedtls_printf( "usage: rsa_sign <filename>\n" ); |
| |
| #if defined(_WIN32) |
| mbedtls_printf( "\n" ); |
| #endif |
| |
| goto exit; |
| } |
| |
| mbedtls_printf( "\n . Reading private key from rsa_priv.txt" ); |
| fflush( stdout ); |
| |
| if( ( f = fopen( "rsa_priv.txt", "rb" ) ) == NULL ) |
| { |
| mbedtls_printf( " failed\n ! Could not open rsa_priv.txt\n" \ |
| " ! Please run rsa_genkey first\n\n" ); |
| goto exit; |
| } |
| |
| if( ( ret = mbedtls_mpi_read_file( &N , 16, f ) ) != 0 || |
| ( ret = mbedtls_mpi_read_file( &E , 16, f ) ) != 0 || |
| ( ret = mbedtls_mpi_read_file( &D , 16, f ) ) != 0 || |
| ( ret = mbedtls_mpi_read_file( &P , 16, f ) ) != 0 || |
| ( ret = mbedtls_mpi_read_file( &Q , 16, f ) ) != 0 || |
| ( ret = mbedtls_mpi_read_file( &DP , 16, f ) ) != 0 || |
| ( ret = mbedtls_mpi_read_file( &DQ , 16, f ) ) != 0 || |
| ( ret = mbedtls_mpi_read_file( &QP , 16, f ) ) != 0 ) |
| { |
| mbedtls_printf( " failed\n ! mbedtls_mpi_read_file returned %d\n\n", ret ); |
| fclose( f ); |
| goto exit; |
| } |
| fclose( f ); |
| |
| if( ( ret = mbedtls_rsa_import( &rsa, &N, &P, &Q, &D, &E ) ) != 0 ) |
| { |
| mbedtls_printf( " failed\n ! mbedtls_rsa_import returned %d\n\n", |
| ret ); |
| goto exit; |
| } |
| |
| if( ( ret = mbedtls_rsa_complete( &rsa ) ) != 0 ) |
| { |
| mbedtls_printf( " failed\n ! mbedtls_rsa_complete returned %d\n\n", |
| ret ); |
| goto exit; |
| } |
| |
| mbedtls_printf( "\n . Checking the private key" ); |
| fflush( stdout ); |
| if( ( ret = mbedtls_rsa_check_privkey( &rsa ) ) != 0 ) |
| { |
| mbedtls_printf( " failed\n ! mbedtls_rsa_check_privkey failed with -0x%0x\n", (unsigned int) -ret ); |
| goto exit; |
| } |
| |
| /* |
| * Compute the SHA-256 hash of the input file, |
| * then calculate the RSA signature of the hash. |
| */ |
| mbedtls_printf( "\n . Generating the RSA/SHA-256 signature" ); |
| fflush( stdout ); |
| |
| if( ( ret = mbedtls_md_file( |
| mbedtls_md_info_from_type( MBEDTLS_MD_SHA256 ), |
| argv[1], hash ) ) != 0 ) |
| { |
| mbedtls_printf( " failed\n ! Could not open or read %s\n\n", argv[1] ); |
| goto exit; |
| } |
| |
| if( ( ret = mbedtls_rsa_pkcs1_sign( &rsa, NULL, NULL, MBEDTLS_RSA_PRIVATE, MBEDTLS_MD_SHA256, |
| 20, hash, buf ) ) != 0 ) |
| { |
| mbedtls_printf( " failed\n ! mbedtls_rsa_pkcs1_sign returned -0x%0x\n\n", (unsigned int) -ret ); |
| goto exit; |
| } |
| |
| /* |
| * Write the signature into <filename>.sig |
| */ |
| mbedtls_snprintf( filename, sizeof(filename), "%s.sig", argv[1] ); |
| |
| if( ( f = fopen( filename, "wb+" ) ) == NULL ) |
| { |
| mbedtls_printf( " failed\n ! Could not create %s\n\n", argv[1] ); |
| goto exit; |
| } |
| |
| for( i = 0; i < rsa.len; i++ ) |
| mbedtls_fprintf( f, "%02X%s", buf[i], |
| ( i + 1 ) % 16 == 0 ? "\r\n" : " " ); |
| |
| fclose( f ); |
| |
| mbedtls_printf( "\n . Done (created \"%s\")\n\n", filename ); |
| |
| exit_code = MBEDTLS_EXIT_SUCCESS; |
| |
| exit: |
| |
| mbedtls_rsa_free( &rsa ); |
| mbedtls_mpi_free( &N ); mbedtls_mpi_free( &P ); mbedtls_mpi_free( &Q ); |
| mbedtls_mpi_free( &D ); mbedtls_mpi_free( &E ); mbedtls_mpi_free( &DP ); |
| mbedtls_mpi_free( &DQ ); mbedtls_mpi_free( &QP ); |
| |
| #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_FS_IO */ |