216 lines
6.3 KiB
C
Executable file
216 lines
6.3 KiB
C
Executable file
/*
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* Public key-based 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_snprintf snprintf
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#define mbedtls_printf printf
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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_ENTROPY_C) || \
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!defined(MBEDTLS_SHA256_C) || !defined(MBEDTLS_MD_C) || \
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!defined(MBEDTLS_PK_PARSE_C) || !defined(MBEDTLS_FS_IO) || \
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!defined(MBEDTLS_CTR_DRBG_C)
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int main( void )
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{
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mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_ENTROPY_C and/or "
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"MBEDTLS_SHA256_C and/or MBEDTLS_MD_C and/or "
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"MBEDTLS_PK_PARSE_C and/or MBEDTLS_FS_IO and/or "
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"MBEDTLS_CTR_DRBG_C 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/error.h"
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#include "mbedtls/entropy.h"
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#include "mbedtls/ctr_drbg.h"
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#include "mbedtls/md.h"
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#include "mbedtls/pk.h"
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#include <stdio.h>
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#include <string.h>
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/*
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* For the currently used signature algorithms the buffer to store any signature
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* must be at least of size MAX(MBEDTLS_ECDSA_MAX_LEN, MBEDTLS_MPI_MAX_SIZE)
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*/
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#if MBEDTLS_ECDSA_MAX_LEN > MBEDTLS_MPI_MAX_SIZE
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#define SIGNATURE_MAX_SIZE MBEDTLS_ECDSA_MAX_LEN
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#else
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#define SIGNATURE_MAX_SIZE MBEDTLS_MPI_MAX_SIZE
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#endif
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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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mbedtls_pk_context pk;
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mbedtls_entropy_context entropy;
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mbedtls_ctr_drbg_context ctr_drbg;
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unsigned char hash[32];
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unsigned char buf[SIGNATURE_MAX_SIZE];
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char filename[512];
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const char *pers = "mbedtls_pk_sign";
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size_t olen = 0;
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mbedtls_entropy_init( &entropy );
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mbedtls_ctr_drbg_init( &ctr_drbg );
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mbedtls_pk_init( &pk );
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if( argc != 3 )
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{
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mbedtls_printf( "usage: mbedtls_pk_sign <key_file> <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 . Seeding the random number generator..." );
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fflush( stdout );
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if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
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(const unsigned char *) pers,
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strlen( pers ) ) ) != 0 )
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{
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mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned -0x%04x\n", -ret );
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goto exit;
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}
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mbedtls_printf( "\n . Reading private key from '%s'", argv[1] );
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fflush( stdout );
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if( ( ret = mbedtls_pk_parse_keyfile( &pk, argv[1], "" ) ) != 0 )
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{
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mbedtls_printf( " failed\n ! Could not parse '%s'\n", argv[1] );
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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 signature of the hash.
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*/
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mbedtls_printf( "\n . Generating the 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[2], hash ) ) != 0 )
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{
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mbedtls_printf( " failed\n ! Could not open or read %s\n\n", argv[2] );
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goto exit;
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}
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if( ( ret = mbedtls_pk_sign( &pk, MBEDTLS_MD_SHA256, hash, 0, buf, &olen,
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mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
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{
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mbedtls_printf( " failed\n ! mbedtls_pk_sign returned -0x%04x\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[2] );
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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", filename );
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goto exit;
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}
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if( fwrite( buf, 1, olen, f ) != olen )
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{
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mbedtls_printf( "failed\n ! fwrite failed\n\n" );
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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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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_pk_free( &pk );
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mbedtls_ctr_drbg_free( &ctr_drbg );
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mbedtls_entropy_free( &entropy );
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#if defined(MBEDTLS_ERROR_C)
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if( exit_code != MBEDTLS_EXIT_SUCCESS )
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{
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mbedtls_strerror( ret, (char *) buf, sizeof(buf) );
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mbedtls_printf( " ! Last error was: %s\n", buf );
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}
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#endif
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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_ENTROPY_C &&
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MBEDTLS_SHA256_C && MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO &&
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MBEDTLS_CTR_DRBG_C */
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