1 /*
2 * Public key-based signature creation program
3 *
4 * Copyright The Mbed TLS Contributors
5 * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
6 */
7
8 #define MBEDTLS_DECLARE_PRIVATE_IDENTIFIERS
9
10 #include "tf-psa-crypto/build_info.h"
11
12 #include "mbedtls/platform.h"
13 /* md.h is included this early since MD_CAN_XXX macros are defined there. */
14 #include "mbedtls/md.h"
15
16 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_ENTROPY_C) || \
17 !defined(PSA_WANT_ALG_SHA_256) || !defined(MBEDTLS_MD_C) || \
18 !defined(MBEDTLS_PK_PARSE_C) || !defined(MBEDTLS_FS_IO) || \
19 !defined(MBEDTLS_CTR_DRBG_C)
main(void)20 int main(void)
21 {
22 mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_ENTROPY_C and/or "
23 "PSA_WANT_ALG_SHA_256 and/or MBEDTLS_MD_C and/or "
24 "MBEDTLS_PK_PARSE_C and/or MBEDTLS_FS_IO and/or "
25 "MBEDTLS_CTR_DRBG_C not defined.\n");
26 mbedtls_exit(0);
27 }
28 #else
29
30 #include "mbedtls/entropy.h"
31 #include "mbedtls/ctr_drbg.h"
32 #include "mbedtls/pk.h"
33 #if defined(MBEDTLS_PK_HAVE_PRIVATE_HEADER)
34 #include <mbedtls/private/pk_private.h>
35 #endif /* MBEDTLS_PK_HAVE_PRIVATE_HEADER */
36
37 #include <stdio.h>
38 #include <string.h>
39
main(int argc,char * argv[])40 int main(int argc, char *argv[])
41 {
42 FILE *f;
43 int ret = 1;
44 int exit_code = MBEDTLS_EXIT_FAILURE;
45 mbedtls_pk_context pk;
46 mbedtls_entropy_context entropy;
47 mbedtls_ctr_drbg_context ctr_drbg;
48 unsigned char hash[32];
49 unsigned char buf[MBEDTLS_PK_SIGNATURE_MAX_SIZE];
50 char filename[512];
51 const char *pers = "mbedtls_pk_sign";
52 size_t olen = 0;
53
54 mbedtls_entropy_init(&entropy);
55 mbedtls_ctr_drbg_init(&ctr_drbg);
56 mbedtls_pk_init(&pk);
57
58 psa_status_t status = psa_crypto_init();
59 if (status != PSA_SUCCESS) {
60 mbedtls_fprintf(stderr, "Failed to initialize PSA Crypto implementation: %d\n",
61 (int) status);
62 goto exit;
63 }
64
65 if (argc != 3) {
66 mbedtls_printf("usage: mbedtls_pk_sign <key_file> <filename>\n");
67
68 #if defined(_WIN32)
69 mbedtls_printf("\n");
70 #endif
71
72 goto exit;
73 }
74
75 mbedtls_printf("\n . Seeding the random number generator...");
76 fflush(stdout);
77
78 if ((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
79 (const unsigned char *) pers,
80 strlen(pers))) != 0) {
81 mbedtls_printf(" failed\n ! mbedtls_ctr_drbg_seed returned -0x%04x\n",
82 (unsigned int) -ret);
83 goto exit;
84 }
85
86 mbedtls_printf("\n . Reading private key from '%s'", argv[1]);
87 fflush(stdout);
88
89 if ((ret = mbedtls_pk_parse_keyfile(&pk, argv[1], "")) != 0) {
90 mbedtls_printf(" failed\n ! Could not parse '%s'\n", argv[1]);
91 goto exit;
92 }
93
94 /*
95 * Compute the SHA-256 hash of the input file,
96 * then calculate the signature of the hash.
97 */
98 mbedtls_printf("\n . Generating the SHA-256 signature");
99 fflush(stdout);
100
101 if ((ret = mbedtls_md_file(
102 mbedtls_md_info_from_type(MBEDTLS_MD_SHA256),
103 argv[2], hash)) != 0) {
104 mbedtls_printf(" failed\n ! Could not open or read %s\n\n", argv[2]);
105 goto exit;
106 }
107
108 if ((ret = mbedtls_pk_sign(&pk, MBEDTLS_MD_SHA256, hash, 0,
109 buf, sizeof(buf), &olen)) != 0) {
110 mbedtls_printf(" failed\n ! mbedtls_pk_sign returned -0x%04x\n", (unsigned int) -ret);
111 goto exit;
112 }
113
114 /*
115 * Write the signature into <filename>.sig
116 */
117 mbedtls_snprintf(filename, sizeof(filename), "%s.sig", argv[2]);
118
119 if ((f = fopen(filename, "wb+")) == NULL) {
120 mbedtls_printf(" failed\n ! Could not create %s\n\n", filename);
121 goto exit;
122 }
123
124 if (fwrite(buf, 1, olen, f) != olen) {
125 mbedtls_printf("failed\n ! fwrite failed\n\n");
126 fclose(f);
127 goto exit;
128 }
129
130 fclose(f);
131
132 mbedtls_printf("\n . Done (created \"%s\")\n\n", filename);
133
134 exit_code = MBEDTLS_EXIT_SUCCESS;
135
136 exit:
137 mbedtls_pk_free(&pk);
138 mbedtls_ctr_drbg_free(&ctr_drbg);
139 mbedtls_entropy_free(&entropy);
140 mbedtls_psa_crypto_free();
141
142 #if defined(MBEDTLS_ERROR_C)
143 if (exit_code != MBEDTLS_EXIT_SUCCESS) {
144 mbedtls_printf("Error code: %d", ret);
145 /* mbedtls_strerror(ret, (char *) buf, sizeof(buf));
146 mbedtls_printf(" ! Last error was: %s\n", buf); */
147 }
148 #endif
149
150 mbedtls_exit(exit_code);
151 }
152 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C &&
153 PSA_WANT_ALG_SHA_256 && MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO &&
154 MBEDTLS_CTR_DRBG_C */
155