1 /*
2 * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * Redistributions of source code must retain the above copyright notice, this
8 * list of conditions and the following disclaimer.
9 *
10 * Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 *
14 * Neither the name of ARM nor the names of its contributors may be used
15 * to endorse or promote products derived from this software without specific
16 * prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include <getopt.h>
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <string.h>
35
36 #include <openssl/conf.h>
37 #include <openssl/evp.h>
38 #include <openssl/pem.h>
39
40 #include "cert.h"
41 #include "debug.h"
42 #include "key.h"
43 #include "platform_oid.h"
44 #include "sha.h"
45
46 #define MAX_FILENAME_LEN 1024
47
48 /*
49 * Create a new key
50 */
key_new(key_t * key)51 int key_new(key_t *key)
52 {
53 RSA *rsa = NULL;
54 EVP_PKEY *k = NULL;
55
56 /* Create key pair container */
57 k = EVP_PKEY_new();
58 if (k == NULL) {
59 return 0;
60 }
61
62 /* Generate a new RSA key */
63 rsa = RSA_generate_key(RSA_KEY_BITS, RSA_F4, NULL, NULL);
64 if (EVP_PKEY_assign_RSA(k, rsa)) {
65 key->key = k;
66 return 1;
67 } else {
68 printf("Cannot assign RSA key\n");
69 }
70
71 if (k)
72 EVP_PKEY_free(k);
73 return 0;
74 }
75
key_load(key_t * key)76 int key_load(key_t *key)
77 {
78 FILE *fp = NULL;
79 EVP_PKEY *k = NULL;
80
81 /* Create key pair container */
82 k = EVP_PKEY_new();
83 if (k == NULL) {
84 return 0;
85 }
86
87 if (key->fn) {
88 /* Load key from file */
89 fp = fopen(key->fn, "r");
90 if (fp) {
91 k = PEM_read_PrivateKey(fp, &k, NULL, NULL);
92 fclose(fp);
93 if (k) {
94 key->key = k;
95 return 1;
96 } else {
97 ERROR("Cannot read key from %s\n", key->fn);
98 }
99 } else {
100 ERROR("Cannot open file %s\n", key->fn);
101 }
102 } else {
103 ERROR("Key filename not specified\n");
104 }
105
106 if (k)
107 EVP_PKEY_free(k);
108
109 return 0;
110 }
111
key_store(key_t * key)112 int key_store(key_t *key)
113 {
114 FILE *fp = NULL;
115
116 if (key->fn) {
117 fp = fopen(key->fn, "w");
118 if (fp) {
119 PEM_write_PrivateKey(fp, key->key,
120 NULL, NULL, 0, NULL, NULL);
121 fclose(fp);
122 return 1;
123 } else {
124 ERROR("Cannot create file %s\n", key->fn);
125 }
126 } else {
127 ERROR("Key filename not specified\n");
128 }
129
130 return 0;
131 }
132