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 #if !defined(MBEDTLS_CONFIG_FILE)
9 #include "mbedtls/config.h"
10 #else
11 #include MBEDTLS_CONFIG_FILE
12 #endif
13
14 #include "mbedtls/platform.h"
15
16 #if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_PK_PARSE_C) && \
17 defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_FS_IO) && \
18 defined(MBEDTLS_CTR_DRBG_C)
19 #include "mbedtls/error.h"
20 #include "mbedtls/pk.h"
21 #include "mbedtls/entropy.h"
22 #include "mbedtls/ctr_drbg.h"
23
24 #include <stdio.h>
25 #include <string.h>
26 #endif
27
28 #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)
main(void)31 int main(void)
32 {
33 mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_PK_PARSE_C and/or "
34 "MBEDTLS_ENTROPY_C and/or MBEDTLS_FS_IO and/or "
35 "MBEDTLS_CTR_DRBG_C not defined.\n");
36 mbedtls_exit(0);
37 }
38 #else
39
40
main(int argc,char * argv[])41 int main(int argc, char *argv[])
42 {
43 FILE *f;
44 int ret = 1;
45 int exit_code = MBEDTLS_EXIT_FAILURE;
46 size_t i, olen = 0;
47 mbedtls_pk_context pk;
48 mbedtls_entropy_context entropy;
49 mbedtls_ctr_drbg_context ctr_drbg;
50 unsigned char input[1024];
51 unsigned char buf[512];
52 const char *pers = "mbedtls_pk_encrypt";
53
54 mbedtls_ctr_drbg_init(&ctr_drbg);
55 mbedtls_entropy_init(&entropy);
56 mbedtls_pk_init(&pk);
57
58 #if defined(MBEDTLS_USE_PSA_CRYPTO)
59 psa_status_t status = psa_crypto_init();
60 if (status != PSA_SUCCESS) {
61 mbedtls_fprintf(stderr, "Failed to initialize PSA Crypto implementation: %d\n",
62 (int) status);
63 goto exit;
64 }
65 #endif /* MBEDTLS_USE_PSA_CRYPTO */
66
67 if (argc != 3) {
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 mbedtls_printf(" failed\n ! mbedtls_ctr_drbg_seed returned -0x%04x\n",
84 (unsigned int) -ret);
85 goto exit;
86 }
87
88 mbedtls_printf("\n . Reading public key from '%s'", argv[1]);
89 fflush(stdout);
90
91 if ((ret = mbedtls_pk_parse_public_keyfile(&pk, argv[1])) != 0) {
92 mbedtls_printf(" failed\n ! mbedtls_pk_parse_public_keyfile returned -0x%04x\n",
93 (unsigned int) -ret);
94 goto exit;
95 }
96
97 if (strlen(argv[2]) > 100) {
98 mbedtls_printf(" Input data larger than 100 characters.\n\n");
99 goto exit;
100 }
101
102 memcpy(input, argv[2], strlen(argv[2]));
103
104 /*
105 * Calculate the RSA encryption of the hash.
106 */
107 mbedtls_printf("\n . Generating the encrypted value");
108 fflush(stdout);
109
110 if ((ret = mbedtls_pk_encrypt(&pk, input, strlen(argv[2]),
111 buf, &olen, sizeof(buf),
112 mbedtls_ctr_drbg_random, &ctr_drbg)) != 0) {
113 mbedtls_printf(" failed\n ! mbedtls_pk_encrypt returned -0x%04x\n",
114 (unsigned int) -ret);
115 goto exit;
116 }
117
118 /*
119 * Write the signature into result-enc.txt
120 */
121 if ((f = fopen("result-enc.txt", "wb+")) == NULL) {
122 mbedtls_printf(" failed\n ! Could not create %s\n\n",
123 "result-enc.txt");
124 ret = 1;
125 goto exit;
126 }
127
128 for (i = 0; i < olen; i++) {
129 mbedtls_fprintf(f, "%02X%s", buf[i],
130 (i + 1) % 16 == 0 ? "\r\n" : " ");
131 }
132
133 fclose(f);
134
135 mbedtls_printf("\n . Done (created \"%s\")\n\n", "result-enc.txt");
136
137 exit_code = MBEDTLS_EXIT_SUCCESS;
138
139 exit:
140
141 mbedtls_pk_free(&pk);
142 mbedtls_entropy_free(&entropy);
143 mbedtls_ctr_drbg_free(&ctr_drbg);
144 #if defined(MBEDTLS_USE_PSA_CRYPTO)
145 mbedtls_psa_crypto_free();
146 #endif /* MBEDTLS_USE_PSA_CRYPTO */
147
148 #if defined(MBEDTLS_ERROR_C)
149 if (exit_code != MBEDTLS_EXIT_SUCCESS) {
150 mbedtls_strerror(ret, (char *) buf, sizeof(buf));
151 mbedtls_printf(" ! Last error was: %s\n", buf);
152 }
153 #endif
154
155 #if defined(_WIN32)
156 mbedtls_printf(" + Press Enter to exit this program.\n");
157 fflush(stdout); getchar();
158 #endif
159
160 mbedtls_exit(exit_code);
161 }
162 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_PK_PARSE_C && MBEDTLS_ENTROPY_C &&
163 MBEDTLS_FS_IO && MBEDTLS_CTR_DRBG_C */
164