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
8 #include "mbedtls/build_info.h"
9
10 #include "mbedtls/platform.h"
11
12 #if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_PK_PARSE_C) && \
13 defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_FS_IO) && \
14 defined(MBEDTLS_CTR_DRBG_C)
15 #include "mbedtls/error.h"
16 #include "mbedtls/pk.h"
17 #include "mbedtls/entropy.h"
18 #include "mbedtls/ctr_drbg.h"
19
20 #include <stdio.h>
21 #include <string.h>
22 #endif
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)
main(void)27 int main(void)
28 {
29 mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_PK_PARSE_C and/or "
30 "MBEDTLS_ENTROPY_C and/or MBEDTLS_FS_IO and/or "
31 "MBEDTLS_CTR_DRBG_C not defined.\n");
32 mbedtls_exit(0);
33 }
34 #else
35
36
main(int argc,char * argv[])37 int main(int argc, char *argv[])
38 {
39 FILE *f;
40 int ret = 1;
41 int exit_code = MBEDTLS_EXIT_FAILURE;
42 size_t i, olen = 0;
43 mbedtls_pk_context pk;
44 mbedtls_entropy_context entropy;
45 mbedtls_ctr_drbg_context ctr_drbg;
46 unsigned char input[1024];
47 unsigned char buf[512];
48 const char *pers = "mbedtls_pk_encrypt";
49
50 mbedtls_ctr_drbg_init(&ctr_drbg);
51 mbedtls_entropy_init(&entropy);
52 mbedtls_pk_init(&pk);
53
54 #if defined(MBEDTLS_USE_PSA_CRYPTO)
55 psa_status_t status = psa_crypto_init();
56 if (status != PSA_SUCCESS) {
57 mbedtls_fprintf(stderr, "Failed to initialize PSA Crypto implementation: %d\n",
58 (int) status);
59 goto exit;
60 }
61 #endif /* MBEDTLS_USE_PSA_CRYPTO */
62
63 if (argc != 3) {
64 mbedtls_printf("usage: mbedtls_pk_encrypt <key_file> <string of max 100 characters>\n");
65
66 #if defined(_WIN32)
67 mbedtls_printf("\n");
68 #endif
69
70 goto exit;
71 }
72
73 mbedtls_printf("\n . Seeding the random number generator...");
74 fflush(stdout);
75
76 if ((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func,
77 &entropy, (const unsigned char *) pers,
78 strlen(pers))) != 0) {
79 mbedtls_printf(" failed\n ! mbedtls_ctr_drbg_seed returned -0x%04x\n",
80 (unsigned int) -ret);
81 goto exit;
82 }
83
84 mbedtls_printf("\n . Reading public key from '%s'", argv[1]);
85 fflush(stdout);
86
87 if ((ret = mbedtls_pk_parse_public_keyfile(&pk, argv[1])) != 0) {
88 mbedtls_printf(" failed\n ! mbedtls_pk_parse_public_keyfile returned -0x%04x\n",
89 (unsigned int) -ret);
90 goto exit;
91 }
92
93 if (strlen(argv[2]) > 100) {
94 mbedtls_printf(" Input data larger than 100 characters.\n\n");
95 goto exit;
96 }
97
98 memcpy(input, argv[2], strlen(argv[2]));
99
100 /*
101 * Calculate the RSA encryption of the hash.
102 */
103 mbedtls_printf("\n . Generating the encrypted value");
104 fflush(stdout);
105
106 if ((ret = mbedtls_pk_encrypt(&pk, input, strlen(argv[2]),
107 buf, &olen, sizeof(buf),
108 mbedtls_ctr_drbg_random, &ctr_drbg)) != 0) {
109 mbedtls_printf(" failed\n ! mbedtls_pk_encrypt returned -0x%04x\n",
110 (unsigned int) -ret);
111 goto exit;
112 }
113
114 /*
115 * Write the signature into result-enc.txt
116 */
117 if ((f = fopen("result-enc.txt", "wb+")) == NULL) {
118 mbedtls_printf(" failed\n ! Could not create %s\n\n",
119 "result-enc.txt");
120 ret = 1;
121 goto exit;
122 }
123
124 for (i = 0; i < olen; i++) {
125 mbedtls_fprintf(f, "%02X%s", buf[i],
126 (i + 1) % 16 == 0 ? "\r\n" : " ");
127 }
128
129 fclose(f);
130
131 mbedtls_printf("\n . Done (created \"%s\")\n\n", "result-enc.txt");
132
133 exit_code = MBEDTLS_EXIT_SUCCESS;
134
135 exit:
136
137 mbedtls_pk_free(&pk);
138 mbedtls_entropy_free(&entropy);
139 mbedtls_ctr_drbg_free(&ctr_drbg);
140 #if defined(MBEDTLS_USE_PSA_CRYPTO)
141 mbedtls_psa_crypto_free();
142 #endif /* MBEDTLS_USE_PSA_CRYPTO */
143
144 #if defined(MBEDTLS_ERROR_C)
145 if (exit_code != MBEDTLS_EXIT_SUCCESS) {
146 mbedtls_strerror(ret, (char *) buf, sizeof(buf));
147 mbedtls_printf(" ! Last error was: %s\n", buf);
148 }
149 #endif
150
151 mbedtls_exit(exit_code);
152 }
153 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_PK_PARSE_C && MBEDTLS_ENTROPY_C &&
154 MBEDTLS_FS_IO && MBEDTLS_CTR_DRBG_C */
155
