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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>
Simon Butcherc0190352016-04-13 11:52:56 +010032#include <stdlib.h>
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020033#define mbedtls_fprintf fprintf
34#define mbedtls_printf printf
Simon Butcher4529c482016-04-12 13:25:08 +010035#define mbedtls_exit exit
Rich Evansf90016a2015-01-19 14:26:37 +000036#endif
37
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020038#if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_RSA_C) && \
39 defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_FS_IO) && \
40 defined(MBEDTLS_CTR_DRBG_C)
Manuel Pégourié-Gonnard7f809972015-03-09 17:05:11 +000041#include "mbedtls/rsa.h"
42#include "mbedtls/entropy.h"
43#include "mbedtls/ctr_drbg.h"
Paul Bakker7bc05ff2011-08-09 10:30:36 +000044
Rich Evans18b78c72015-02-11 14:06:19 +000045#include <string.h>
46#endif
47
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020048#if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_RSA_C) || \
49 !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_FS_IO) || \
50 !defined(MBEDTLS_CTR_DRBG_C)
Rich Evans85b05ec2015-02-12 11:37:29 +000051int main( void )
Paul Bakker7bc05ff2011-08-09 10:30:36 +000052{
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020053 mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_RSA_C and/or "
54 "MBEDTLS_ENTROPY_C and/or MBEDTLS_FS_IO and/or "
55 "MBEDTLS_CTR_DRBG_C not defined.\n");
Paul Bakker7bc05ff2011-08-09 10:30:36 +000056 return( 0 );
57}
58#else
59int main( int argc, char *argv[] )
60{
61 FILE *f;
Simon Butcher4529c482016-04-12 13:25:08 +010062 int return_val, exit_val;
Paul Bakker7bc05ff2011-08-09 10:30:36 +000063 size_t i;
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020064 mbedtls_rsa_context rsa;
65 mbedtls_entropy_context entropy;
66 mbedtls_ctr_drbg_context ctr_drbg;
Paul Bakker7bc05ff2011-08-09 10:30:36 +000067 unsigned char input[1024];
68 unsigned char buf[512];
Paul Bakkeref3f8c72013-06-24 13:01:08 +020069 const char *pers = "rsa_encrypt";
Paul Bakker7bc05ff2011-08-09 10:30:36 +000070
Simon Butcher663638d2016-04-12 15:04:10 +010071 exit_val = 0;
Paul Bakker7bc05ff2011-08-09 10:30:36 +000072
73 if( argc != 2 )
74 {
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020075 mbedtls_printf( "usage: rsa_encrypt <string of max 100 characters>\n" );
Paul Bakker7bc05ff2011-08-09 10:30:36 +000076
Paul Bakkercce9d772011-11-18 14:26:47 +000077#if defined(_WIN32)
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020078 mbedtls_printf( "\n" );
Paul Bakker7bc05ff2011-08-09 10:30:36 +000079#endif
80
Simon Butcher663638d2016-04-12 15:04:10 +010081 mbedtls_exit( 1 );
Paul Bakker7bc05ff2011-08-09 10:30:36 +000082 }
83
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020084 mbedtls_printf( "\n . Seeding the random number generator..." );
Paul Bakker508ad5a2011-12-04 17:09:26 +000085 fflush( stdout );
86
Simon Butcher4529c482016-04-12 13:25:08 +010087 mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, 0 );
88 mbedtls_ctr_drbg_init( &ctr_drbg );
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020089 mbedtls_entropy_init( &entropy );
Simon Butcher4529c482016-04-12 13:25:08 +010090
91 return_val = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func,
92 &entropy, (const unsigned char *) pers,
93 strlen( pers ) );
94 if( return_val != 0 )
Paul Bakker508ad5a2011-12-04 17:09:26 +000095 {
Simon Butcher663638d2016-04-12 15:04:10 +010096 exit_val = 1;
Simon Butcher4529c482016-04-12 13:25:08 +010097 mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n",
98 return_val );
Paul Bakker508ad5a2011-12-04 17:09:26 +000099 goto exit;
100 }
101
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200102 mbedtls_printf( "\n . Reading public key from rsa_pub.txt" );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000103 fflush( stdout );
104
Paul Bakkerd246ed32011-10-06 13:18:27 +0000105 if( ( f = fopen( "rsa_pub.txt", "rb" ) ) == NULL )
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000106 {
Simon Butcher663638d2016-04-12 15:04:10 +0100107 exit_val = 1;
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200108 mbedtls_printf( " failed\n ! Could not open rsa_pub.txt\n" \
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000109 " ! Please run rsa_genkey first\n\n" );
110 goto exit;
111 }
112
Simon Butcher4529c482016-04-12 13:25:08 +0100113 if( ( return_val = mbedtls_mpi_read_file( &rsa.N, 16, f ) ) != 0 ||
114 ( return_val = mbedtls_mpi_read_file( &rsa.E, 16, f ) ) != 0 )
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000115 {
Simon Butcher663638d2016-04-12 15:04:10 +0100116 exit_val = 1;
Simon Butcher4529c482016-04-12 13:25:08 +0100117 mbedtls_printf( " failed\n ! mbedtls_mpi_read_file returned %d\n\n",
118 return_val );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000119 goto exit;
120 }
121
Manuel Pégourié-Gonnardc0696c22015-06-18 16:47:17 +0200122 rsa.len = ( mbedtls_mpi_bitlen( &rsa.N ) + 7 ) >> 3;
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000123
124 fclose( f );
125
126 if( strlen( argv[1] ) > 100 )
127 {
Simon Butcher663638d2016-04-12 15:04:10 +0100128 exit_val = 1;
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200129 mbedtls_printf( " Input data larger than 100 characters.\n\n" );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000130 goto exit;
131 }
132
133 memcpy( input, argv[1], strlen( argv[1] ) );
134
135 /*
136 * Calculate the RSA encryption of the hash.
137 */
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200138 mbedtls_printf( "\n . Generating the RSA encrypted value" );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000139 fflush( stdout );
140
Simon Butcher4529c482016-04-12 13:25:08 +0100141 return_val = mbedtls_rsa_pkcs1_encrypt( &rsa, mbedtls_ctr_drbg_random,
142 &ctr_drbg, MBEDTLS_RSA_PUBLIC,
143 strlen( argv[1] ), input, buf );
144 if( return_val != 0 )
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000145 {
Simon Butcher663638d2016-04-12 15:04:10 +0100146 exit_val = 1;
Simon Butcher4529c482016-04-12 13:25:08 +0100147 mbedtls_printf( " failed\n ! mbedtls_rsa_pkcs1_encrypt returned %d\n\n",
148 return_val );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000149 goto exit;
150 }
151
152 /*
153 * Write the signature into result-enc.txt
154 */
155 if( ( f = fopen( "result-enc.txt", "wb+" ) ) == NULL )
156 {
Simon Butcher663638d2016-04-12 15:04:10 +0100157 exit_val = 1;
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200158 mbedtls_printf( " failed\n ! Could not create %s\n\n", "result-enc.txt" );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000159 goto exit;
160 }
161
162 for( i = 0; i < rsa.len; i++ )
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200163 mbedtls_fprintf( f, "%02X%s", buf[i],
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000164 ( i + 1 ) % 16 == 0 ? "\r\n" : " " );
165
166 fclose( f );
167
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200168 mbedtls_printf( "\n . Done (created \"%s\")\n\n", "result-enc.txt" );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000169
170exit:
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200171 mbedtls_ctr_drbg_free( &ctr_drbg );
172 mbedtls_entropy_free( &entropy );
Janos Follathbffa68d2016-03-17 15:21:39 +0000173 mbedtls_rsa_free( &rsa );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000174
Paul Bakkercce9d772011-11-18 14:26:47 +0000175#if defined(_WIN32)
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200176 mbedtls_printf( " + Press Enter to exit this program.\n" );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000177 fflush( stdout ); getchar();
178#endif
179
Simon Butcher4529c482016-04-12 13:25:08 +0100180 return( exit_val );
Paul Bakker7bc05ff2011-08-09 10:30:36 +0000181}
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200182#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_ENTROPY_C &&
183 MBEDTLS_FS_IO && MBEDTLS_CTR_DRBG_C */