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Paul Bakker5121ce52009-01-03 21:22:43 +00001/*
Manuel Pégourié-Gonnard6f60cd82015-02-10 10:47:03 +00002 * RSA/SHA-256 signature creation program
Paul Bakker5121ce52009-01-03 21:22:43 +00003 *
Manuel Pégourié-Gonnard6fb81872015-07-27 11:11:48 +02004 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
Bence Szépkúti4e9f7122020-06-05 13:02:18 +02005 * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
6 *
7 * This file is provided under the Apache License 2.0, or the
8 * GNU General Public License v2.0 or later.
9 *
10 * **********
11 * Apache License 2.0:
Manuel Pégourié-Gonnard37ff1402015-09-04 14:21:07 +020012 *
13 * Licensed under the Apache License, Version 2.0 (the "License"); you may
14 * not use this file except in compliance with the License.
15 * You may obtain a copy of the License at
16 *
17 * http://www.apache.org/licenses/LICENSE-2.0
18 *
19 * Unless required by applicable law or agreed to in writing, software
20 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
21 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
22 * See the License for the specific language governing permissions and
23 * limitations under the License.
Paul Bakkerb96f1542010-07-18 20:36:00 +000024 *
Bence Szépkúti4e9f7122020-06-05 13:02:18 +020025 * **********
26 *
27 * **********
28 * GNU General Public License v2.0 or later:
29 *
30 * This program is free software; you can redistribute it and/or modify
31 * it under the terms of the GNU General Public License as published by
32 * the Free Software Foundation; either version 2 of the License, or
33 * (at your option) any later version.
34 *
35 * This program is distributed in the hope that it will be useful,
36 * but WITHOUT ANY WARRANTY; without even the implied warranty of
37 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
38 * GNU General Public License for more details.
39 *
40 * You should have received a copy of the GNU General Public License along
41 * with this program; if not, write to the Free Software Foundation, Inc.,
42 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
43 *
44 * **********
45 *
Manuel Pégourié-Gonnardfe446432015-03-06 13:17:10 +000046 * This file is part of mbed TLS (https://tls.mbed.org)
Paul Bakker5121ce52009-01-03 21:22:43 +000047 */
48
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020049#if !defined(MBEDTLS_CONFIG_FILE)
Manuel Pégourié-Gonnard7f809972015-03-09 17:05:11 +000050#include "mbedtls/config.h"
Manuel Pégourié-Gonnardcef4ad22014-04-29 12:39:06 +020051#else
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020052#include MBEDTLS_CONFIG_FILE
Manuel Pégourié-Gonnardcef4ad22014-04-29 12:39:06 +020053#endif
Paul Bakker5121ce52009-01-03 21:22:43 +000054
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020055#if defined(MBEDTLS_PLATFORM_C)
Manuel Pégourié-Gonnard7f809972015-03-09 17:05:11 +000056#include "mbedtls/platform.h"
Rich Evansf90016a2015-01-19 14:26:37 +000057#else
Rich Evans18b78c72015-02-11 14:06:19 +000058#include <stdio.h>
Andres Amaya Garcia39e19642018-04-29 20:16:46 +010059#include <stdlib.h>
60#define mbedtls_fprintf fprintf
61#define mbedtls_printf printf
62#define mbedtls_snprintf snprintf
Krzysztof Stachowiaka0865222019-04-24 14:24:46 +020063#define mbedtls_exit exit
Andres Amaya Garcia2b0599b2018-04-30 22:42:33 +010064#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
Andres Amaya Garcia39e19642018-04-29 20:16:46 +010065#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
66#endif /* MBEDTLS_PLATFORM_C */
Rich Evansf90016a2015-01-19 14:26:37 +000067
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020068#if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_RSA_C) || \
Manuel Pégourié-Gonnard06d5d612015-05-28 16:23:18 +020069 !defined(MBEDTLS_SHA256_C) || !defined(MBEDTLS_MD_C) || \
70 !defined(MBEDTLS_FS_IO)
Rich Evans85b05ec2015-02-12 11:37:29 +000071int main( void )
Paul Bakker5690efc2011-05-26 13:16:06 +000072{
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020073 mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_RSA_C and/or "
Manuel Pégourié-Gonnard2ed05a02015-09-09 11:52:28 +020074 "MBEDTLS_MD_C and/or "
Manuel Pégourié-Gonnard06d5d612015-05-28 16:23:18 +020075 "MBEDTLS_SHA256_C and/or MBEDTLS_FS_IO not defined.\n");
Krzysztof Stachowiaka0865222019-04-24 14:24:46 +020076 mbedtls_exit( 0 );
Paul Bakker5690efc2011-05-26 13:16:06 +000077}
78#else
Manuel Pégourié-Gonnard06d5d612015-05-28 16:23:18 +020079
80#include "mbedtls/rsa.h"
81#include "mbedtls/md.h"
82
83#include <stdio.h>
84#include <string.h>
85
Paul Bakker5121ce52009-01-03 21:22:43 +000086int main( int argc, char *argv[] )
87{
88 FILE *f;
Andres Amaya Garcia39e19642018-04-29 20:16:46 +010089 int ret = 1;
90 int exit_code = MBEDTLS_EXIT_FAILURE;
Paul Bakker23986e52011-04-24 08:57:21 +000091 size_t i;
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020092 mbedtls_rsa_context rsa;
Manuel Pégourié-Gonnard102a6202015-08-27 21:51:44 +020093 unsigned char hash[32];
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020094 unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
Manuel Pégourié-Gonnardd74c6972015-08-27 21:39:40 +020095 char filename[512];
Hanno Beckerd6ba5e32017-08-23 06:48:07 +010096 mbedtls_mpi N, P, Q, D, E, DP, DQ, QP;
Paul Bakker5121ce52009-01-03 21:22:43 +000097
Janos Follathf713b0a2016-03-17 15:21:39 +000098 mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, 0 );
Hanno Beckerd6ba5e32017-08-23 06:48:07 +010099
100 mbedtls_mpi_init( &N ); mbedtls_mpi_init( &P ); mbedtls_mpi_init( &Q );
101 mbedtls_mpi_init( &D ); mbedtls_mpi_init( &E ); mbedtls_mpi_init( &DP );
102 mbedtls_mpi_init( &DQ ); mbedtls_mpi_init( &QP );
103
Paul Bakker5121ce52009-01-03 21:22:43 +0000104 if( argc != 2 )
105 {
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200106 mbedtls_printf( "usage: rsa_sign <filename>\n" );
Paul Bakker5121ce52009-01-03 21:22:43 +0000107
Paul Bakkercce9d772011-11-18 14:26:47 +0000108#if defined(_WIN32)
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200109 mbedtls_printf( "\n" );
Paul Bakker5121ce52009-01-03 21:22:43 +0000110#endif
111
112 goto exit;
113 }
114
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200115 mbedtls_printf( "\n . Reading private key from rsa_priv.txt" );
Paul Bakker5121ce52009-01-03 21:22:43 +0000116 fflush( stdout );
117
118 if( ( f = fopen( "rsa_priv.txt", "rb" ) ) == NULL )
119 {
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200120 mbedtls_printf( " failed\n ! Could not open rsa_priv.txt\n" \
Paul Bakker5121ce52009-01-03 21:22:43 +0000121 " ! Please run rsa_genkey first\n\n" );
122 goto exit;
123 }
124
Hanno Beckerd6ba5e32017-08-23 06:48:07 +0100125 if( ( ret = mbedtls_mpi_read_file( &N , 16, f ) ) != 0 ||
126 ( ret = mbedtls_mpi_read_file( &E , 16, f ) ) != 0 ||
127 ( ret = mbedtls_mpi_read_file( &D , 16, f ) ) != 0 ||
128 ( ret = mbedtls_mpi_read_file( &P , 16, f ) ) != 0 ||
129 ( ret = mbedtls_mpi_read_file( &Q , 16, f ) ) != 0 ||
130 ( ret = mbedtls_mpi_read_file( &DP , 16, f ) ) != 0 ||
131 ( ret = mbedtls_mpi_read_file( &DQ , 16, f ) ) != 0 ||
132 ( ret = mbedtls_mpi_read_file( &QP , 16, f ) ) != 0 )
Paul Bakker5121ce52009-01-03 21:22:43 +0000133 {
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200134 mbedtls_printf( " failed\n ! mbedtls_mpi_read_file returned %d\n\n", ret );
Janos Follath98e28a72016-05-31 14:03:54 +0100135 fclose( f );
Paul Bakker5121ce52009-01-03 21:22:43 +0000136 goto exit;
137 }
Paul Bakker5121ce52009-01-03 21:22:43 +0000138 fclose( f );
139
Hanno Beckerd6ba5e32017-08-23 06:48:07 +0100140 if( ( ret = mbedtls_rsa_import( &rsa, &N, &P, &Q, &D, &E ) ) != 0 )
141 {
142 mbedtls_printf( " failed\n ! mbedtls_rsa_import returned %d\n\n",
143 ret );
144 goto exit;
145 }
146
Hanno Becker7f25f852017-10-10 16:56:22 +0100147 if( ( ret = mbedtls_rsa_complete( &rsa ) ) != 0 )
Hanno Beckerd6ba5e32017-08-23 06:48:07 +0100148 {
149 mbedtls_printf( " failed\n ! mbedtls_rsa_complete returned %d\n\n",
150 ret );
151 goto exit;
152 }
153
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200154 mbedtls_printf( "\n . Checking the private key" );
Paul Bakker5ef9db22012-09-27 13:19:22 +0000155 fflush( stdout );
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200156 if( ( ret = mbedtls_rsa_check_privkey( &rsa ) ) != 0 )
Paul Bakker5ef9db22012-09-27 13:19:22 +0000157 {
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200158 mbedtls_printf( " failed\n ! mbedtls_rsa_check_privkey failed with -0x%0x\n", -ret );
Paul Bakker5ef9db22012-09-27 13:19:22 +0000159 goto exit;
160 }
161
Paul Bakker5121ce52009-01-03 21:22:43 +0000162 /*
Manuel Pégourié-Gonnard6f60cd82015-02-10 10:47:03 +0000163 * Compute the SHA-256 hash of the input file,
Paul Bakker5121ce52009-01-03 21:22:43 +0000164 * then calculate the RSA signature of the hash.
165 */
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200166 mbedtls_printf( "\n . Generating the RSA/SHA-256 signature" );
Paul Bakker5121ce52009-01-03 21:22:43 +0000167 fflush( stdout );
168
Manuel Pégourié-Gonnard06d5d612015-05-28 16:23:18 +0200169 if( ( ret = mbedtls_md_file(
170 mbedtls_md_info_from_type( MBEDTLS_MD_SHA256 ),
171 argv[1], hash ) ) != 0 )
Paul Bakker5121ce52009-01-03 21:22:43 +0000172 {
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200173 mbedtls_printf( " failed\n ! Could not open or read %s\n\n", argv[1] );
Paul Bakker5121ce52009-01-03 21:22:43 +0000174 goto exit;
175 }
176
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200177 if( ( ret = mbedtls_rsa_pkcs1_sign( &rsa, NULL, NULL, MBEDTLS_RSA_PRIVATE, MBEDTLS_MD_SHA256,
Paul Bakker5121ce52009-01-03 21:22:43 +0000178 20, hash, buf ) ) != 0 )
179 {
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200180 mbedtls_printf( " failed\n ! mbedtls_rsa_pkcs1_sign returned -0x%0x\n\n", -ret );
Paul Bakker5121ce52009-01-03 21:22:43 +0000181 goto exit;
182 }
183
184 /*
Manuel Pégourié-Gonnardd74c6972015-08-27 21:39:40 +0200185 * Write the signature into <filename>.sig
Paul Bakker5121ce52009-01-03 21:22:43 +0000186 */
Manuel Pégourié-Gonnardd74c6972015-08-27 21:39:40 +0200187 mbedtls_snprintf( filename, sizeof(filename), "%s.sig", argv[1] );
Paul Bakker5121ce52009-01-03 21:22:43 +0000188
Manuel Pégourié-Gonnardd74c6972015-08-27 21:39:40 +0200189 if( ( f = fopen( filename, "wb+" ) ) == NULL )
Paul Bakker5121ce52009-01-03 21:22:43 +0000190 {
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200191 mbedtls_printf( " failed\n ! Could not create %s\n\n", argv[1] );
Paul Bakker5121ce52009-01-03 21:22:43 +0000192 goto exit;
193 }
194
195 for( i = 0; i < rsa.len; i++ )
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200196 mbedtls_fprintf( f, "%02X%s", buf[i],
Paul Bakker5121ce52009-01-03 21:22:43 +0000197 ( i + 1 ) % 16 == 0 ? "\r\n" : " " );
198
199 fclose( f );
200
Manuel Pégourié-Gonnardd74c6972015-08-27 21:39:40 +0200201 mbedtls_printf( "\n . Done (created \"%s\")\n\n", filename );
Paul Bakker5121ce52009-01-03 21:22:43 +0000202
Andres Amaya Garcia39e19642018-04-29 20:16:46 +0100203 exit_code = MBEDTLS_EXIT_SUCCESS;
204
Paul Bakker5121ce52009-01-03 21:22:43 +0000205exit:
206
Janos Follathf713b0a2016-03-17 15:21:39 +0000207 mbedtls_rsa_free( &rsa );
Hanno Beckerd6ba5e32017-08-23 06:48:07 +0100208 mbedtls_mpi_free( &N ); mbedtls_mpi_free( &P ); mbedtls_mpi_free( &Q );
209 mbedtls_mpi_free( &D ); mbedtls_mpi_free( &E ); mbedtls_mpi_free( &DP );
210 mbedtls_mpi_free( &DQ ); mbedtls_mpi_free( &QP );
Janos Follathf713b0a2016-03-17 15:21:39 +0000211
Paul Bakkercce9d772011-11-18 14:26:47 +0000212#if defined(_WIN32)
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200213 mbedtls_printf( " + Press Enter to exit this program.\n" );
Paul Bakker5121ce52009-01-03 21:22:43 +0000214 fflush( stdout ); getchar();
215#endif
216
Krzysztof Stachowiaka0865222019-04-24 14:24:46 +0200217 mbedtls_exit( exit_code );
Paul Bakker5121ce52009-01-03 21:22:43 +0000218}
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200219#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_SHA256_C &&
220 MBEDTLS_FS_IO */