1 /*
2 * RSA simple data encryption program
3 *
4 * Copyright The Mbed TLS Contributors
5 * 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.
18 */
19
20 #include "mbedtls/build_info.h"
21
22 #include "mbedtls/platform.h"
23
24 #if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_PK_PARSE_C) && \
25 defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_FS_IO) && \
26 defined(MBEDTLS_CTR_DRBG_C)
27 #include "mbedtls/error.h"
28 #include "mbedtls/pk.h"
29 #include "mbedtls/entropy.h"
30 #include "mbedtls/ctr_drbg.h"
31
32 #include <stdio.h>
33 #include <string.h>
34 #endif
35
36 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_PK_PARSE_C) || \
37 !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_FS_IO) || \
38 !defined(MBEDTLS_CTR_DRBG_C)
main(void)39 int main( void )
40 {
41 mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_PK_PARSE_C and/or "
42 "MBEDTLS_ENTROPY_C and/or MBEDTLS_FS_IO and/or "
43 "MBEDTLS_CTR_DRBG_C not defined.\n");
44 mbedtls_exit( 0 );
45 }
46 #else
47
48
main(int argc,char * argv[])49 int main( int argc, char *argv[] )
50 {
51 FILE *f;
52 int ret = 1;
53 int exit_code = MBEDTLS_EXIT_FAILURE;
54 size_t i, olen = 0;
55 mbedtls_pk_context pk;
56 mbedtls_entropy_context entropy;
57 mbedtls_ctr_drbg_context ctr_drbg;
58 unsigned char input[1024];
59 unsigned char buf[512];
60 const char *pers = "mbedtls_pk_encrypt";
61
62 mbedtls_ctr_drbg_init( &ctr_drbg );
63 mbedtls_entropy_init( &entropy );
64 mbedtls_pk_init( &pk );
65
66 if( argc != 3 )
67 {
68 mbedtls_printf( "usage: mbedtls_pk_encrypt <key_file> <string of max 100 characters>\n" );
69
70 #if defined(_WIN32)
71 mbedtls_printf( "\n" );
72 #endif
73
74 goto exit;
75 }
76
77 mbedtls_printf( "\n . Seeding the random number generator..." );
78 fflush( stdout );
79
80 if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func,
81 &entropy, (const unsigned char *) pers,
82 strlen( pers ) ) ) != 0 )
83 {
84 mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned -0x%04x\n",
85 (unsigned int) -ret );
86 goto exit;
87 }
88
89 mbedtls_printf( "\n . Reading public key from '%s'", argv[1] );
90 fflush( stdout );
91
92 if( ( ret = mbedtls_pk_parse_public_keyfile( &pk, argv[1] ) ) != 0 )
93 {
94 mbedtls_printf( " failed\n ! mbedtls_pk_parse_public_keyfile returned -0x%04x\n", (unsigned int) -ret );
95 goto exit;
96 }
97
98 if( strlen( argv[2] ) > 100 )
99 {
100 mbedtls_printf( " Input data larger than 100 characters.\n\n" );
101 goto exit;
102 }
103
104 memcpy( input, argv[2], strlen( argv[2] ) );
105
106 /*
107 * Calculate the RSA encryption of the hash.
108 */
109 mbedtls_printf( "\n . Generating the encrypted value" );
110 fflush( stdout );
111
112 if( ( ret = mbedtls_pk_encrypt( &pk, input, strlen( argv[2] ),
113 buf, &olen, sizeof(buf),
114 mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
115 {
116 mbedtls_printf( " failed\n ! mbedtls_pk_encrypt returned -0x%04x\n",
117 (unsigned int) -ret );
118 goto exit;
119 }
120
121 /*
122 * Write the signature into result-enc.txt
123 */
124 if( ( f = fopen( "result-enc.txt", "wb+" ) ) == NULL )
125 {
126 mbedtls_printf( " failed\n ! Could not create %s\n\n",
127 "result-enc.txt" );
128 ret = 1;
129 goto exit;
130 }
131
132 for( i = 0; i < olen; i++ )
133 {
134 mbedtls_fprintf( f, "%02X%s", buf[i],
135 ( i + 1 ) % 16 == 0 ? "\r\n" : " " );
136 }
137
138 fclose( f );
139
140 mbedtls_printf( "\n . Done (created \"%s\")\n\n", "result-enc.txt" );
141
142 exit_code = MBEDTLS_EXIT_SUCCESS;
143
144 exit:
145
146 mbedtls_pk_free( &pk );
147 mbedtls_entropy_free( &entropy );
148 mbedtls_ctr_drbg_free( &ctr_drbg );
149
150 #if defined(MBEDTLS_ERROR_C)
151 if( exit_code != MBEDTLS_EXIT_SUCCESS )
152 {
153 mbedtls_strerror( ret, (char *) buf, sizeof( buf ) );
154 mbedtls_printf( " ! Last error was: %s\n", buf );
155 }
156 #endif
157
158 mbedtls_exit( exit_code );
159 }
160 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_PK_PARSE_C && MBEDTLS_ENTROPY_C &&
161 MBEDTLS_FS_IO && MBEDTLS_CTR_DRBG_C */
162
