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Paul Bakker940f9ce2013-09-18 15:34:57 +02001/*
2 * Public key-based signature creation program
3 *
Bence Szépkúti1e148272020-08-07 13:07:28 +02004 * Copyright The Mbed TLS Contributors
Manuel Pégourié-Gonnard37ff1402015-09-04 14:21:07 +02005 * SPDX-License-Identifier: Apache-2.0
6 *
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
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
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.
Paul Bakker940f9ce2013-09-18 15:34:57 +020018 */
19
Bence Szépkútic662b362021-05-27 11:25:03 +020020#include "mbedtls/build_info.h"
Paul Bakker940f9ce2013-09-18 15:34:57 +020021
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020022#if defined(MBEDTLS_PLATFORM_C)
Manuel Pégourié-Gonnard7f809972015-03-09 17:05:11 +000023#include "mbedtls/platform.h"
Rich Evansf90016a2015-01-19 14:26:37 +000024#else
Rich Evans18b78c72015-02-11 14:06:19 +000025#include <stdio.h>
Andrzej Kurekb3640532018-04-03 06:16:04 -040026#include <stdlib.h>
Andres Amaya Garcia82b27262018-04-29 22:26:25 +010027#define mbedtls_snprintf snprintf
28#define mbedtls_printf printf
Manuel Pégourié-Gonnard3ef6a6d2018-12-10 14:31:45 +010029#define mbedtls_exit exit
Andres Amaya Garcia7d429652018-04-30 22:42:33 +010030#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
Andres Amaya Garcia82b27262018-04-29 22:26:25 +010031#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
32#endif /* MBEDTLS_PLATFORM_C */
Rich Evansf90016a2015-01-19 14:26:37 +000033
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020034#if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_ENTROPY_C) || \
Manuel Pégourié-Gonnard06d5d612015-05-28 16:23:18 +020035 !defined(MBEDTLS_SHA256_C) || !defined(MBEDTLS_MD_C) || \
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020036 !defined(MBEDTLS_PK_PARSE_C) || !defined(MBEDTLS_FS_IO) || \
37 !defined(MBEDTLS_CTR_DRBG_C)
Rich Evans85b05ec2015-02-12 11:37:29 +000038int main( void )
Paul Bakker940f9ce2013-09-18 15:34:57 +020039{
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020040 mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_ENTROPY_C and/or "
Manuel Pégourié-Gonnard2ed05a02015-09-09 11:52:28 +020041 "MBEDTLS_SHA256_C and/or MBEDTLS_MD_C and/or "
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020042 "MBEDTLS_PK_PARSE_C and/or MBEDTLS_FS_IO and/or "
43 "MBEDTLS_CTR_DRBG_C not defined.\n");
Krzysztof Stachowiak5e1b1952019-04-24 14:24:46 +020044 mbedtls_exit( 0 );
Paul Bakker940f9ce2013-09-18 15:34:57 +020045}
46#else
Manuel Pégourié-Gonnard06d5d612015-05-28 16:23:18 +020047
48#include "mbedtls/error.h"
49#include "mbedtls/entropy.h"
50#include "mbedtls/ctr_drbg.h"
51#include "mbedtls/md.h"
52#include "mbedtls/pk.h"
53
54#include <stdio.h>
55#include <string.h>
56
Paul Bakker940f9ce2013-09-18 15:34:57 +020057int main( int argc, char *argv[] )
58{
59 FILE *f;
Paul Bakker0c226102014-04-17 16:02:36 +020060 int ret = 1;
Andres Amaya Garcia82b27262018-04-29 22:26:25 +010061 int exit_code = MBEDTLS_EXIT_FAILURE;
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020062 mbedtls_pk_context pk;
63 mbedtls_entropy_context entropy;
64 mbedtls_ctr_drbg_context ctr_drbg;
Manuel Pégourié-Gonnard102a6202015-08-27 21:51:44 +020065 unsigned char hash[32];
Gilles Peskine96a7cd12019-11-08 19:22:35 +010066 unsigned char buf[MBEDTLS_PK_SIGNATURE_MAX_SIZE];
Paul Bakker940f9ce2013-09-18 15:34:57 +020067 char filename[512];
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020068 const char *pers = "mbedtls_pk_sign";
Paul Bakker940f9ce2013-09-18 15:34:57 +020069 size_t olen = 0;
70
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020071 mbedtls_entropy_init( &entropy );
Manuel Pégourié-Gonnardec160c02015-04-28 22:52:30 +020072 mbedtls_ctr_drbg_init( &ctr_drbg );
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020073 mbedtls_pk_init( &pk );
Paul Bakker940f9ce2013-09-18 15:34:57 +020074
75 if( argc != 3 )
76 {
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020077 mbedtls_printf( "usage: mbedtls_pk_sign <key_file> <filename>\n" );
Paul Bakker940f9ce2013-09-18 15:34:57 +020078
79#if defined(_WIN32)
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020080 mbedtls_printf( "\n" );
Paul Bakker940f9ce2013-09-18 15:34:57 +020081#endif
82
83 goto exit;
84 }
85
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020086 mbedtls_printf( "\n . Seeding the random number generator..." );
Paul Bakker940f9ce2013-09-18 15:34:57 +020087 fflush( stdout );
88
Manuel Pégourié-Gonnardec160c02015-04-28 22:52:30 +020089 if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
Paul Bakker940f9ce2013-09-18 15:34:57 +020090 (const unsigned char *) pers,
91 strlen( pers ) ) ) != 0 )
92 {
Kenneth Soerensen518d4352020-04-01 17:22:45 +020093 mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned -0x%04x\n", (unsigned int) -ret );
Paul Bakker940f9ce2013-09-18 15:34:57 +020094 goto exit;
95 }
96
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020097 mbedtls_printf( "\n . Reading private key from '%s'", argv[1] );
Paul Bakker940f9ce2013-09-18 15:34:57 +020098 fflush( stdout );
99
Manuel Pégourié-Gonnard84dea012021-06-15 11:29:26 +0200100 if( ( ret = mbedtls_pk_parse_keyfile( &pk, argv[1], "",
101 mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
Paul Bakker940f9ce2013-09-18 15:34:57 +0200102 {
Kevin Luty1e7059f2018-03-21 10:01:38 -0500103 mbedtls_printf( " failed\n ! Could not parse '%s'\n", argv[1] );
Paul Bakker940f9ce2013-09-18 15:34:57 +0200104 goto exit;
105 }
106
107 /*
Manuel Pégourié-Gonnard6f60cd82015-02-10 10:47:03 +0000108 * Compute the SHA-256 hash of the input file,
Paul Bakker940f9ce2013-09-18 15:34:57 +0200109 * then calculate the signature of the hash.
110 */
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200111 mbedtls_printf( "\n . Generating the SHA-256 signature" );
Paul Bakker940f9ce2013-09-18 15:34:57 +0200112 fflush( stdout );
113
Manuel Pégourié-Gonnard06d5d612015-05-28 16:23:18 +0200114 if( ( ret = mbedtls_md_file(
115 mbedtls_md_info_from_type( MBEDTLS_MD_SHA256 ),
116 argv[2], hash ) ) != 0 )
Paul Bakker940f9ce2013-09-18 15:34:57 +0200117 {
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200118 mbedtls_printf( " failed\n ! Could not open or read %s\n\n", argv[2] );
Paul Bakker940f9ce2013-09-18 15:34:57 +0200119 goto exit;
120 }
121
Gilles Peskinef00f1522021-06-22 00:09:00 +0200122 if( ( ret = mbedtls_pk_sign( &pk, MBEDTLS_MD_SHA256, hash, 0,
123 buf, sizeof( buf ), &olen,
124 mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
Paul Bakker940f9ce2013-09-18 15:34:57 +0200125 {
Kenneth Soerensen518d4352020-04-01 17:22:45 +0200126 mbedtls_printf( " failed\n ! mbedtls_pk_sign returned -0x%04x\n", (unsigned int) -ret );
Paul Bakker940f9ce2013-09-18 15:34:57 +0200127 goto exit;
128 }
129
130 /*
Manuel Pégourié-Gonnard1d8f2da2015-08-27 21:42:27 +0200131 * Write the signature into <filename>.sig
Paul Bakker940f9ce2013-09-18 15:34:57 +0200132 */
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200133 mbedtls_snprintf( filename, sizeof(filename), "%s.sig", argv[2] );
Paul Bakker940f9ce2013-09-18 15:34:57 +0200134
135 if( ( f = fopen( filename, "wb+" ) ) == NULL )
136 {
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200137 mbedtls_printf( " failed\n ! Could not create %s\n\n", filename );
Paul Bakker940f9ce2013-09-18 15:34:57 +0200138 goto exit;
139 }
140
141 if( fwrite( buf, 1, olen, f ) != olen )
142 {
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200143 mbedtls_printf( "failed\n ! fwrite failed\n\n" );
Janos Follath98e28a72016-05-31 14:03:54 +0100144 fclose( f );
Paul Bakker940f9ce2013-09-18 15:34:57 +0200145 goto exit;
146 }
147
148 fclose( f );
149
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200150 mbedtls_printf( "\n . Done (created \"%s\")\n\n", filename );
Paul Bakker940f9ce2013-09-18 15:34:57 +0200151
Andres Amaya Garcia82b27262018-04-29 22:26:25 +0100152 exit_code = MBEDTLS_EXIT_SUCCESS;
153
Paul Bakker940f9ce2013-09-18 15:34:57 +0200154exit:
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200155 mbedtls_pk_free( &pk );
156 mbedtls_ctr_drbg_free( &ctr_drbg );
157 mbedtls_entropy_free( &entropy );
Paul Bakker940f9ce2013-09-18 15:34:57 +0200158
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200159#if defined(MBEDTLS_ERROR_C)
Andres Amaya Garcia82b27262018-04-29 22:26:25 +0100160 if( exit_code != MBEDTLS_EXIT_SUCCESS )
Manuel Pégourié-Gonnardcf9ab632015-08-27 22:03:33 +0200161 {
162 mbedtls_strerror( ret, (char *) buf, sizeof(buf) );
163 mbedtls_printf( " ! Last error was: %s\n", buf );
164 }
Manuel Pégourié-Gonnard92e5b592013-09-18 18:57:10 +0200165#endif
166
Paul Bakker940f9ce2013-09-18 15:34:57 +0200167#if defined(_WIN32)
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200168 mbedtls_printf( " + Press Enter to exit this program.\n" );
Paul Bakker940f9ce2013-09-18 15:34:57 +0200169 fflush( stdout ); getchar();
170#endif
171
Krzysztof Stachowiak5e1b1952019-04-24 14:24:46 +0200172 mbedtls_exit( exit_code );
Paul Bakker940f9ce2013-09-18 15:34:57 +0200173}
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200174#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C &&
175 MBEDTLS_SHA256_C && MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO &&
176 MBEDTLS_CTR_DRBG_C */