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Paul Bakker7bc05ff2011-08-09 10:30:36 +00001/*
2 * RSA simple data encryption program
3 *
Manuel Pégourié-Gonnard6fb81872015-07-27 11:11:48 +02004 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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 Bakker7bc05ff2011-08-09 10:30:36 +000018 *
Manuel Pégourié-Gonnardfe446432015-03-06 13:17:10 +000019 * This file is part of mbed TLS (https://tls.mbed.org)
Paul Bakker7bc05ff2011-08-09 10:30:36 +000020 */
21
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020022#if !defined(MBEDTLS_CONFIG_FILE)
Manuel Pégourié-Gonnard7f809972015-03-09 17:05:11 +000023#include "mbedtls/config.h"
Manuel Pégourié-Gonnardcef4ad22014-04-29 12:39:06 +020024#else
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020025#include MBEDTLS_CONFIG_FILE
Manuel Pégourié-Gonnardcef4ad22014-04-29 12:39:06 +020026#endif
Paul Bakker7bc05ff2011-08-09 10:30:36 +000027
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020028#if defined(MBEDTLS_PLATFORM_C)
Manuel Pégourié-Gonnard7f809972015-03-09 17:05:11 +000029#include "mbedtls/platform.h"
Rich Evansf90016a2015-01-19 14:26:37 +000030#else
Rich Evans18b78c72015-02-11 14:06:19 +000031#include <stdio.h>
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020032#define mbedtls_fprintf fprintf
33#define mbedtls_printf printf
Simon Butcher4529c482016-04-12 13:25:08 +010034#define mbedtls_exit exit
Rich Evansf90016a2015-01-19 14:26:37 +000035#endif
36
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020037#if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_RSA_C) && \
38 defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_FS_IO) && \
39 defined(MBEDTLS_CTR_DRBG_C)
Manuel Pégourié-Gonnard7f809972015-03-09 17:05:11 +000040#include "mbedtls/rsa.h"
41#include "mbedtls/entropy.h"
42#include "mbedtls/ctr_drbg.h"
Paul Bakker7bc05ff2011-08-09 10:30:36 +000043
Rich Evans18b78c72015-02-11 14:06:19 +000044#include <string.h>
45#endif
46
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020047#if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_RSA_C) || \
48 !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_FS_IO) || \
49 !defined(MBEDTLS_CTR_DRBG_C)
Rich Evans85b05ec2015-02-12 11:37:29 +000050int main( void )
Paul Bakker7bc05ff2011-08-09 10:30:36 +000051{
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020052 mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_RSA_C and/or "
53 "MBEDTLS_ENTROPY_C and/or MBEDTLS_FS_IO and/or "
54 "MBEDTLS_CTR_DRBG_C not defined.\n");
Paul Bakker7bc05ff2011-08-09 10:30:36 +000055 return( 0 );
56}
57#else
58int main( int argc, char *argv[] )
59{
60 FILE *f;
Simon Butcher4529c482016-04-12 13:25:08 +010061 int return_val, exit_val;
Paul Bakker7bc05ff2011-08-09 10:30:36 +000062 size_t i;
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020063 mbedtls_rsa_context rsa;
64 mbedtls_entropy_context entropy;
65 mbedtls_ctr_drbg_context ctr_drbg;
Paul Bakker7bc05ff2011-08-09 10:30:36 +000066 unsigned char input[1024];
67 unsigned char buf[512];
Paul Bakkeref3f8c72013-06-24 13:01:08 +020068 const char *pers = "rsa_encrypt";
Paul Bakker7bc05ff2011-08-09 10:30:36 +000069
Simon Butcher663638d2016-04-12 15:04:10 +010070 exit_val = 0;
Paul Bakker7bc05ff2011-08-09 10:30:36 +000071
72 if( argc != 2 )
73 {
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020074 mbedtls_printf( "usage: rsa_encrypt <string of max 100 characters>\n" );
Paul Bakker7bc05ff2011-08-09 10:30:36 +000075
Paul Bakkercce9d772011-11-18 14:26:47 +000076#if defined(_WIN32)
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020077 mbedtls_printf( "\n" );
Paul Bakker7bc05ff2011-08-09 10:30:36 +000078#endif
79
Simon Butcher663638d2016-04-12 15:04:10 +010080 mbedtls_exit( 1 );
Paul Bakker7bc05ff2011-08-09 10:30:36 +000081 }
82
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020083 mbedtls_printf( "\n . Seeding the random number generator..." );
Paul Bakker508ad5a2011-12-04 17:09:26 +000084 fflush( stdout );
85
Simon Butcher4529c482016-04-12 13:25:08 +010086 mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, 0 );
87 mbedtls_ctr_drbg_init( &ctr_drbg );
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020088 mbedtls_entropy_init( &entropy );
Simon Butcher4529c482016-04-12 13:25:08 +010089
90 return_val = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func,
91 &entropy, (const unsigned char *) pers,
92 strlen( pers ) );
93 if( return_val != 0 )
Paul Bakker508ad5a2011-12-04 17:09:26 +000094 {
Simon Butcher663638d2016-04-12 15:04:10 +010095 exit_val = 1;
Simon Butcher4529c482016-04-12 13:25:08 +010096 mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n",
97 return_val );
Paul Bakker508ad5a2011-12-04 17:09:26 +000098 goto exit;
99 }
100
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200101 mbedtls_printf( "\n . Reading public key from rsa_pub.txt" );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000102 fflush( stdout );
103
Paul Bakkerd246ed32011-10-06 13:18:27 +0000104 if( ( f = fopen( "rsa_pub.txt", "rb" ) ) == NULL )
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000105 {
Simon Butcher663638d2016-04-12 15:04:10 +0100106 exit_val = 1;
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200107 mbedtls_printf( " failed\n ! Could not open rsa_pub.txt\n" \
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000108 " ! Please run rsa_genkey first\n\n" );
109 goto exit;
110 }
111
Simon Butcher4529c482016-04-12 13:25:08 +0100112 if( ( return_val = mbedtls_mpi_read_file( &rsa.N, 16, f ) ) != 0 ||
113 ( return_val = mbedtls_mpi_read_file( &rsa.E, 16, f ) ) != 0 )
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000114 {
Simon Butcher663638d2016-04-12 15:04:10 +0100115 exit_val = 1;
Simon Butcher4529c482016-04-12 13:25:08 +0100116 mbedtls_printf( " failed\n ! mbedtls_mpi_read_file returned %d\n\n",
117 return_val );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000118 goto exit;
119 }
120
Manuel Pégourié-Gonnardc0696c22015-06-18 16:47:17 +0200121 rsa.len = ( mbedtls_mpi_bitlen( &rsa.N ) + 7 ) >> 3;
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000122
123 fclose( f );
124
125 if( strlen( argv[1] ) > 100 )
126 {
Simon Butcher663638d2016-04-12 15:04:10 +0100127 exit_val = 1;
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200128 mbedtls_printf( " Input data larger than 100 characters.\n\n" );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000129 goto exit;
130 }
131
132 memcpy( input, argv[1], strlen( argv[1] ) );
133
134 /*
135 * Calculate the RSA encryption of the hash.
136 */
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200137 mbedtls_printf( "\n . Generating the RSA encrypted value" );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000138 fflush( stdout );
139
Simon Butcher4529c482016-04-12 13:25:08 +0100140 return_val = mbedtls_rsa_pkcs1_encrypt( &rsa, mbedtls_ctr_drbg_random,
141 &ctr_drbg, MBEDTLS_RSA_PUBLIC,
142 strlen( argv[1] ), input, buf );
143 if( return_val != 0 )
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000144 {
Simon Butcher663638d2016-04-12 15:04:10 +0100145 exit_val = 1;
Simon Butcher4529c482016-04-12 13:25:08 +0100146 mbedtls_printf( " failed\n ! mbedtls_rsa_pkcs1_encrypt returned %d\n\n",
147 return_val );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000148 goto exit;
149 }
150
151 /*
152 * Write the signature into result-enc.txt
153 */
154 if( ( f = fopen( "result-enc.txt", "wb+" ) ) == NULL )
155 {
Simon Butcher663638d2016-04-12 15:04:10 +0100156 exit_val = 1;
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200157 mbedtls_printf( " failed\n ! Could not create %s\n\n", "result-enc.txt" );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000158 goto exit;
159 }
160
161 for( i = 0; i < rsa.len; i++ )
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200162 mbedtls_fprintf( f, "%02X%s", buf[i],
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000163 ( i + 1 ) % 16 == 0 ? "\r\n" : " " );
164
165 fclose( f );
166
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200167 mbedtls_printf( "\n . Done (created \"%s\")\n\n", "result-enc.txt" );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000168
169exit:
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200170 mbedtls_ctr_drbg_free( &ctr_drbg );
171 mbedtls_entropy_free( &entropy );
Janos Follathbffa68d2016-03-17 15:21:39 +0000172 mbedtls_rsa_free( &rsa );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000173
Paul Bakkercce9d772011-11-18 14:26:47 +0000174#if defined(_WIN32)
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200175 mbedtls_printf( " + Press Enter to exit this program.\n" );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000176 fflush( stdout ); getchar();
177#endif
178
Simon Butcher4529c482016-04-12 13:25:08 +0100179 return( exit_val );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000180}
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200181#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_ENTROPY_C &&
182 MBEDTLS_FS_IO && MBEDTLS_CTR_DRBG_C */