1 /*
2 * RSA simple data encryption program
3 *
4 * Copyright The Mbed TLS Contributors
5 * 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:
12 *
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.
24 *
25 * **********
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 */
46
47 #if !defined(MBEDTLS_CONFIG_FILE)
48 #include "mbedtls/config.h"
49 #else
50 #include MBEDTLS_CONFIG_FILE
51 #endif
52
53 #if defined(MBEDTLS_PLATFORM_C)
54 #include "mbedtls/platform.h"
55 #else
56 #include <stdio.h>
57 #include <stdlib.h>
58 #define mbedtls_fprintf fprintf
59 #define mbedtls_printf printf
60 #define mbedtls_exit exit
61 #define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
62 #define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
63 #endif /* MBEDTLS_PLATFORM_C */
64
65 #if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_PK_PARSE_C) && \
66 defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_FS_IO) && \
67 defined(MBEDTLS_CTR_DRBG_C)
68 #include "mbedtls/error.h"
69 #include "mbedtls/pk.h"
70 #include "mbedtls/entropy.h"
71 #include "mbedtls/ctr_drbg.h"
72
73 #include <stdio.h>
74 #include <string.h>
75 #endif
76
77 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_PK_PARSE_C) || \
78 !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_FS_IO) || \
79 !defined(MBEDTLS_CTR_DRBG_C)
main(void)80 int main( void )
81 {
82 mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_PK_PARSE_C and/or "
83 "MBEDTLS_ENTROPY_C and/or MBEDTLS_FS_IO and/or "
84 "MBEDTLS_CTR_DRBG_C not defined.\n");
85 mbedtls_exit( 0 );
86 }
87 #else
88
89
main(int argc,char * argv[])90 int main( int argc, char *argv[] )
91 {
92 FILE *f;
93 int ret = 1;
94 int exit_code = MBEDTLS_EXIT_FAILURE;
95 size_t i, olen = 0;
96 mbedtls_pk_context pk;
97 mbedtls_entropy_context entropy;
98 mbedtls_ctr_drbg_context ctr_drbg;
99 unsigned char input[1024];
100 unsigned char buf[512];
101 const char *pers = "mbedtls_pk_encrypt";
102
103 mbedtls_ctr_drbg_init( &ctr_drbg );
104 mbedtls_entropy_init( &entropy );
105 mbedtls_pk_init( &pk );
106
107 if( argc != 3 )
108 {
109 mbedtls_printf( "usage: mbedtls_pk_encrypt <key_file> <string of max 100 characters>\n" );
110
111 #if defined(_WIN32)
112 mbedtls_printf( "\n" );
113 #endif
114
115 goto exit;
116 }
117
118 mbedtls_printf( "\n . Seeding the random number generator..." );
119 fflush( stdout );
120
121 if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func,
122 &entropy, (const unsigned char *) pers,
123 strlen( pers ) ) ) != 0 )
124 {
125 mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned -0x%04x\n",
126 -ret );
127 goto exit;
128 }
129
130 mbedtls_printf( "\n . Reading public key from '%s'", argv[1] );
131 fflush( stdout );
132
133 if( ( ret = mbedtls_pk_parse_public_keyfile( &pk, argv[1] ) ) != 0 )
134 {
135 mbedtls_printf( " failed\n ! mbedtls_pk_parse_public_keyfile returned -0x%04x\n", -ret );
136 goto exit;
137 }
138
139 if( strlen( argv[2] ) > 100 )
140 {
141 mbedtls_printf( " Input data larger than 100 characters.\n\n" );
142 goto exit;
143 }
144
145 memcpy( input, argv[2], strlen( argv[2] ) );
146
147 /*
148 * Calculate the RSA encryption of the hash.
149 */
150 mbedtls_printf( "\n . Generating the encrypted value" );
151 fflush( stdout );
152
153 if( ( ret = mbedtls_pk_encrypt( &pk, input, strlen( argv[2] ),
154 buf, &olen, sizeof(buf),
155 mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
156 {
157 mbedtls_printf( " failed\n ! mbedtls_pk_encrypt returned -0x%04x\n",
158 -ret );
159 goto exit;
160 }
161
162 /*
163 * Write the signature into result-enc.txt
164 */
165 if( ( f = fopen( "result-enc.txt", "wb+" ) ) == NULL )
166 {
167 mbedtls_printf( " failed\n ! Could not create %s\n\n",
168 "result-enc.txt" );
169 ret = 1;
170 goto exit;
171 }
172
173 for( i = 0; i < olen; i++ )
174 {
175 mbedtls_fprintf( f, "%02X%s", buf[i],
176 ( i + 1 ) % 16 == 0 ? "\r\n" : " " );
177 }
178
179 fclose( f );
180
181 mbedtls_printf( "\n . Done (created \"%s\")\n\n", "result-enc.txt" );
182
183 exit_code = MBEDTLS_EXIT_SUCCESS;
184
185 exit:
186
187 mbedtls_pk_free( &pk );
188 mbedtls_entropy_free( &entropy );
189 mbedtls_ctr_drbg_free( &ctr_drbg );
190
191 #if defined(MBEDTLS_ERROR_C)
192 if( exit_code != MBEDTLS_EXIT_SUCCESS )
193 {
194 mbedtls_strerror( ret, (char *) buf, sizeof( buf ) );
195 mbedtls_printf( " ! Last error was: %s\n", buf );
196 }
197 #endif
198
199 #if defined(_WIN32)
200 mbedtls_printf( " + Press Enter to exit this program.\n" );
201 fflush( stdout ); getchar();
202 #endif
203
204 mbedtls_exit( exit_code );
205 }
206 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_PK_PARSE_C && MBEDTLS_ENTROPY_C &&
207 MBEDTLS_FS_IO && MBEDTLS_CTR_DRBG_C */
208