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Paul Bakker940f9ce2013-09-18 15:34:57 +02001/*
2 * RSA simple data encryption 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
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020020#if !defined(MBEDTLS_CONFIG_FILE)
Manuel Pégourié-Gonnard7f809972015-03-09 17:05:11 +000021#include "mbedtls/config.h"
Manuel Pégourié-Gonnardcef4ad22014-04-29 12:39:06 +020022#else
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020023#include MBEDTLS_CONFIG_FILE
Manuel Pégourié-Gonnardcef4ad22014-04-29 12:39:06 +020024#endif
Paul Bakker940f9ce2013-09-18 15:34:57 +020025
Manuel Pégourié-Gonnard7f809972015-03-09 17:05:11 +000026#include "mbedtls/platform.h"
Rich Evansf90016a2015-01-19 14:26:37 +000027
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020028#if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_PK_PARSE_C) && \
29 defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_FS_IO) && \
30 defined(MBEDTLS_CTR_DRBG_C)
Manuel Pégourié-Gonnard7f809972015-03-09 17:05:11 +000031#include "mbedtls/error.h"
32#include "mbedtls/pk.h"
33#include "mbedtls/entropy.h"
34#include "mbedtls/ctr_drbg.h"
Paul Bakker940f9ce2013-09-18 15:34:57 +020035
Rich Evans18b78c72015-02-11 14:06:19 +000036#include <stdio.h>
37#include <string.h>
38#endif
39
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020040#if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_PK_PARSE_C) || \
41 !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_FS_IO) || \
42 !defined(MBEDTLS_CTR_DRBG_C)
Rich Evans85b05ec2015-02-12 11:37:29 +000043int main( void )
Paul Bakker940f9ce2013-09-18 15:34:57 +020044{
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020045 mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_PK_PARSE_C and/or "
46 "MBEDTLS_ENTROPY_C and/or MBEDTLS_FS_IO and/or "
47 "MBEDTLS_CTR_DRBG_C not defined.\n");
Krzysztof Stachowiak5e1b1952019-04-24 14:24:46 +020048 mbedtls_exit( 0 );
Paul Bakker940f9ce2013-09-18 15:34:57 +020049}
50#else
Simon Butcher63cb97e2018-12-06 17:43:31 +000051
Simon Butcher63cb97e2018-12-06 17:43:31 +000052
Paul Bakker940f9ce2013-09-18 15:34:57 +020053int main( int argc, char *argv[] )
54{
55 FILE *f;
Andres Amaya Garcia52898172018-04-29 22:19:26 +010056 int ret = 1;
57 int exit_code = MBEDTLS_EXIT_FAILURE;
Paul Bakker940f9ce2013-09-18 15:34:57 +020058 size_t i, olen = 0;
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020059 mbedtls_pk_context pk;
60 mbedtls_entropy_context entropy;
61 mbedtls_ctr_drbg_context ctr_drbg;
Paul Bakker940f9ce2013-09-18 15:34:57 +020062 unsigned char input[1024];
63 unsigned char buf[512];
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020064 const char *pers = "mbedtls_pk_encrypt";
Paul Bakker940f9ce2013-09-18 15:34:57 +020065
Manuel Pégourié-Gonnardec160c02015-04-28 22:52:30 +020066 mbedtls_ctr_drbg_init( &ctr_drbg );
Hanno Becker55c11ba2018-08-23 14:36:33 +010067 mbedtls_entropy_init( &entropy );
68 mbedtls_pk_init( &pk );
Paul Bakker940f9ce2013-09-18 15:34:57 +020069
70 if( argc != 3 )
71 {
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020072 mbedtls_printf( "usage: mbedtls_pk_encrypt <key_file> <string of max 100 characters>\n" );
Paul Bakker940f9ce2013-09-18 15:34:57 +020073
74#if defined(_WIN32)
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020075 mbedtls_printf( "\n" );
Paul Bakker940f9ce2013-09-18 15:34:57 +020076#endif
77
78 goto exit;
79 }
80
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020081 mbedtls_printf( "\n . Seeding the random number generator..." );
Paul Bakker940f9ce2013-09-18 15:34:57 +020082 fflush( stdout );
83
Hanno Beckerae513a52018-08-23 14:39:04 +010084 if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func,
85 &entropy, (const unsigned char *) pers,
86 strlen( pers ) ) ) != 0 )
Paul Bakker940f9ce2013-09-18 15:34:57 +020087 {
Hanno Beckerae513a52018-08-23 14:39:04 +010088 mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned -0x%04x\n",
Kenneth Soerensen518d4352020-04-01 17:22:45 +020089 (unsigned int) -ret );
Paul Bakker940f9ce2013-09-18 15:34:57 +020090 goto exit;
91 }
92
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020093 mbedtls_printf( "\n . Reading public key from '%s'", argv[1] );
Paul Bakker940f9ce2013-09-18 15:34:57 +020094 fflush( stdout );
95
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020096 if( ( ret = mbedtls_pk_parse_public_keyfile( &pk, argv[1] ) ) != 0 )
Paul Bakker940f9ce2013-09-18 15:34:57 +020097 {
Kenneth Soerensen518d4352020-04-01 17:22:45 +020098 mbedtls_printf( " failed\n ! mbedtls_pk_parse_public_keyfile returned -0x%04x\n", (unsigned int) -ret );
Paul Bakker940f9ce2013-09-18 15:34:57 +020099 goto exit;
100 }
101
102 if( strlen( argv[2] ) > 100 )
103 {
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200104 mbedtls_printf( " Input data larger than 100 characters.\n\n" );
Paul Bakker940f9ce2013-09-18 15:34:57 +0200105 goto exit;
106 }
107
108 memcpy( input, argv[2], strlen( argv[2] ) );
109
110 /*
111 * Calculate the RSA encryption of the hash.
112 */
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200113 mbedtls_printf( "\n . Generating the encrypted value" );
Paul Bakker940f9ce2013-09-18 15:34:57 +0200114 fflush( stdout );
115
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200116 if( ( ret = mbedtls_pk_encrypt( &pk, input, strlen( argv[2] ),
Paul Bakker940f9ce2013-09-18 15:34:57 +0200117 buf, &olen, sizeof(buf),
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200118 mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
Paul Bakker940f9ce2013-09-18 15:34:57 +0200119 {
Hanno Beckerae513a52018-08-23 14:39:04 +0100120 mbedtls_printf( " failed\n ! mbedtls_pk_encrypt returned -0x%04x\n",
Kenneth Soerensen518d4352020-04-01 17:22:45 +0200121 (unsigned int) -ret );
Paul Bakker940f9ce2013-09-18 15:34:57 +0200122 goto exit;
123 }
124
125 /*
126 * Write the signature into result-enc.txt
127 */
128 if( ( f = fopen( "result-enc.txt", "wb+" ) ) == NULL )
129 {
Hanno Beckerae513a52018-08-23 14:39:04 +0100130 mbedtls_printf( " failed\n ! Could not create %s\n\n",
131 "result-enc.txt" );
Hanno Becker55c11ba2018-08-23 14:36:33 +0100132 ret = 1;
Paul Bakker940f9ce2013-09-18 15:34:57 +0200133 goto exit;
134 }
135
136 for( i = 0; i < olen; i++ )
Hanno Beckerae513a52018-08-23 14:39:04 +0100137 {
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200138 mbedtls_fprintf( f, "%02X%s", buf[i],
Paul Bakker940f9ce2013-09-18 15:34:57 +0200139 ( i + 1 ) % 16 == 0 ? "\r\n" : " " );
Hanno Beckerae513a52018-08-23 14:39:04 +0100140 }
Paul Bakker940f9ce2013-09-18 15:34:57 +0200141
142 fclose( f );
143
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200144 mbedtls_printf( "\n . Done (created \"%s\")\n\n", "result-enc.txt" );
Paul Bakker940f9ce2013-09-18 15:34:57 +0200145
Andres Amaya Garcia52898172018-04-29 22:19:26 +0100146 exit_code = MBEDTLS_EXIT_SUCCESS;
147
Paul Bakker940f9ce2013-09-18 15:34:57 +0200148exit:
Hanno Becker55c11ba2018-08-23 14:36:33 +0100149
150 mbedtls_pk_free( &pk );
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200151 mbedtls_entropy_free( &entropy );
Hanno Becker55c11ba2018-08-23 14:36:33 +0100152 mbedtls_ctr_drbg_free( &ctr_drbg );
Paul Bakker940f9ce2013-09-18 15:34:57 +0200153
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200154#if defined(MBEDTLS_ERROR_C)
Andres Amaya Garcia52898172018-04-29 22:19:26 +0100155 if( exit_code != MBEDTLS_EXIT_SUCCESS )
Manuel Pégourié-Gonnardcf9ab632015-08-27 22:03:33 +0200156 {
Hanno Beckerae513a52018-08-23 14:39:04 +0100157 mbedtls_strerror( ret, (char *) buf, sizeof( buf ) );
Manuel Pégourié-Gonnardcf9ab632015-08-27 22:03:33 +0200158 mbedtls_printf( " ! Last error was: %s\n", buf );
159 }
Manuel Pégourié-Gonnard92e5b592013-09-18 18:57:10 +0200160#endif
161
Paul Bakker940f9ce2013-09-18 15:34:57 +0200162#if defined(_WIN32)
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200163 mbedtls_printf( " + Press Enter to exit this program.\n" );
Paul Bakker940f9ce2013-09-18 15:34:57 +0200164 fflush( stdout ); getchar();
165#endif
166
Krzysztof Stachowiak5e1b1952019-04-24 14:24:46 +0200167 mbedtls_exit( exit_code );
Paul Bakker940f9ce2013-09-18 15:34:57 +0200168}
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200169#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_PK_PARSE_C && MBEDTLS_ENTROPY_C &&
170 MBEDTLS_FS_IO && MBEDTLS_CTR_DRBG_C */