219 lines
6.7 KiB
C
Executable file
219 lines
6.7 KiB
C
Executable file
/*
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* RSA/SHA-256 signature creation program
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*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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*
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* This file is provided under the Apache License 2.0, or the
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* GNU General Public License v2.0 or later.
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*
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* **********
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* Apache License 2.0:
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* **********
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*
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* **********
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* GNU General Public License v2.0 or later:
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* **********
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*/
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#if !defined(MBEDTLS_CONFIG_FILE)
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#include "mbedtls/config.h"
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#else
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#include MBEDTLS_CONFIG_FILE
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#endif
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#if defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#else
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#include <stdio.h>
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#include <stdlib.h>
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#define mbedtls_fprintf fprintf
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#define mbedtls_printf printf
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#define mbedtls_snprintf snprintf
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#define mbedtls_exit exit
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#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
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#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
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#endif /* MBEDTLS_PLATFORM_C */
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#if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_RSA_C) || \
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!defined(MBEDTLS_SHA256_C) || !defined(MBEDTLS_MD_C) || \
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!defined(MBEDTLS_FS_IO)
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int main( void )
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{
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mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_RSA_C and/or "
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"MBEDTLS_MD_C and/or "
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"MBEDTLS_SHA256_C and/or MBEDTLS_FS_IO not defined.\n");
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mbedtls_exit( 0 );
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}
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#else
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#include "mbedtls/rsa.h"
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#include "mbedtls/md.h"
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#include <stdio.h>
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#include <string.h>
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int main( int argc, char *argv[] )
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{
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FILE *f;
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int ret = 1;
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int exit_code = MBEDTLS_EXIT_FAILURE;
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size_t i;
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mbedtls_rsa_context rsa;
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unsigned char hash[32];
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unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
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char filename[512];
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mbedtls_mpi N, P, Q, D, E, DP, DQ, QP;
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mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, 0 );
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mbedtls_mpi_init( &N ); mbedtls_mpi_init( &P ); mbedtls_mpi_init( &Q );
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mbedtls_mpi_init( &D ); mbedtls_mpi_init( &E ); mbedtls_mpi_init( &DP );
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mbedtls_mpi_init( &DQ ); mbedtls_mpi_init( &QP );
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if( argc != 2 )
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{
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mbedtls_printf( "usage: rsa_sign <filename>\n" );
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#if defined(_WIN32)
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mbedtls_printf( "\n" );
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#endif
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goto exit;
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}
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mbedtls_printf( "\n . Reading private key from rsa_priv.txt" );
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fflush( stdout );
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if( ( f = fopen( "rsa_priv.txt", "rb" ) ) == NULL )
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{
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mbedtls_printf( " failed\n ! Could not open rsa_priv.txt\n" \
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" ! Please run rsa_genkey first\n\n" );
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goto exit;
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}
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if( ( ret = mbedtls_mpi_read_file( &N , 16, f ) ) != 0 ||
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( ret = mbedtls_mpi_read_file( &E , 16, f ) ) != 0 ||
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( ret = mbedtls_mpi_read_file( &D , 16, f ) ) != 0 ||
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( ret = mbedtls_mpi_read_file( &P , 16, f ) ) != 0 ||
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( ret = mbedtls_mpi_read_file( &Q , 16, f ) ) != 0 ||
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( ret = mbedtls_mpi_read_file( &DP , 16, f ) ) != 0 ||
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( ret = mbedtls_mpi_read_file( &DQ , 16, f ) ) != 0 ||
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( ret = mbedtls_mpi_read_file( &QP , 16, f ) ) != 0 )
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{
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mbedtls_printf( " failed\n ! mbedtls_mpi_read_file returned %d\n\n", ret );
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fclose( f );
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goto exit;
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}
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fclose( f );
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if( ( ret = mbedtls_rsa_import( &rsa, &N, &P, &Q, &D, &E ) ) != 0 )
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{
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mbedtls_printf( " failed\n ! mbedtls_rsa_import returned %d\n\n",
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ret );
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goto exit;
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}
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if( ( ret = mbedtls_rsa_complete( &rsa ) ) != 0 )
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{
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mbedtls_printf( " failed\n ! mbedtls_rsa_complete returned %d\n\n",
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ret );
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goto exit;
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}
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mbedtls_printf( "\n . Checking the private key" );
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fflush( stdout );
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if( ( ret = mbedtls_rsa_check_privkey( &rsa ) ) != 0 )
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{
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mbedtls_printf( " failed\n ! mbedtls_rsa_check_privkey failed with -0x%0x\n", -ret );
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goto exit;
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}
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/*
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* Compute the SHA-256 hash of the input file,
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* then calculate the RSA signature of the hash.
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*/
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mbedtls_printf( "\n . Generating the RSA/SHA-256 signature" );
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fflush( stdout );
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if( ( ret = mbedtls_md_file(
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mbedtls_md_info_from_type( MBEDTLS_MD_SHA256 ),
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argv[1], hash ) ) != 0 )
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{
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mbedtls_printf( " failed\n ! Could not open or read %s\n\n", argv[1] );
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goto exit;
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}
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if( ( ret = mbedtls_rsa_pkcs1_sign( &rsa, NULL, NULL, MBEDTLS_RSA_PRIVATE, MBEDTLS_MD_SHA256,
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20, hash, buf ) ) != 0 )
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{
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mbedtls_printf( " failed\n ! mbedtls_rsa_pkcs1_sign returned -0x%0x\n\n", -ret );
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goto exit;
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}
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/*
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* Write the signature into <filename>.sig
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*/
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mbedtls_snprintf( filename, sizeof(filename), "%s.sig", argv[1] );
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if( ( f = fopen( filename, "wb+" ) ) == NULL )
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{
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mbedtls_printf( " failed\n ! Could not create %s\n\n", argv[1] );
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goto exit;
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}
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for( i = 0; i < rsa.len; i++ )
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mbedtls_fprintf( f, "%02X%s", buf[i],
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( i + 1 ) % 16 == 0 ? "\r\n" : " " );
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fclose( f );
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mbedtls_printf( "\n . Done (created \"%s\")\n\n", filename );
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exit_code = MBEDTLS_EXIT_SUCCESS;
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exit:
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mbedtls_rsa_free( &rsa );
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mbedtls_mpi_free( &N ); mbedtls_mpi_free( &P ); mbedtls_mpi_free( &Q );
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mbedtls_mpi_free( &D ); mbedtls_mpi_free( &E ); mbedtls_mpi_free( &DP );
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mbedtls_mpi_free( &DQ ); mbedtls_mpi_free( &QP );
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#if defined(_WIN32)
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mbedtls_printf( " + Press Enter to exit this program.\n" );
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fflush( stdout ); getchar();
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#endif
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mbedtls_exit( exit_code );
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}
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#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_SHA256_C &&
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MBEDTLS_FS_IO */
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