1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57 #include <openssl/x509.h>
58
59 #include <limits.h>
60
61 #include <openssl/asn1.h>
62 #include <openssl/asn1t.h>
63 #include <openssl/bytestring.h>
64 #include <openssl/err.h>
65 #include <openssl/evp.h>
66 #include <openssl/mem.h>
67 #include <openssl/obj.h>
68 #include <openssl/thread.h>
69
70 #include "../internal.h"
71 #include "internal.h"
72
73 /* Minor tweak to operation: free up EVP_PKEY */
pubkey_cb(int operation,ASN1_VALUE ** pval,const ASN1_ITEM * it,void * exarg)74 static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
75 void *exarg)
76 {
77 if (operation == ASN1_OP_FREE_POST) {
78 X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
79 EVP_PKEY_free(pubkey->pkey);
80 }
81 return 1;
82 }
83
84 ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = {
85 ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR),
86 ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING)
87 } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY)
88
89 IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY)
90
91 int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
92 {
93 X509_PUBKEY *pk = NULL;
94 uint8_t *spki = NULL;
95 size_t spki_len;
96
97 if (x == NULL)
98 return (0);
99
100 CBB cbb;
101 if (!CBB_init(&cbb, 0) ||
102 !EVP_marshal_public_key(&cbb, pkey) ||
103 !CBB_finish(&cbb, &spki, &spki_len) ||
104 spki_len > LONG_MAX) {
105 CBB_cleanup(&cbb);
106 OPENSSL_PUT_ERROR(X509, X509_R_PUBLIC_KEY_ENCODE_ERROR);
107 goto error;
108 }
109
110 const uint8_t *p = spki;
111 pk = d2i_X509_PUBKEY(NULL, &p, (long)spki_len);
112 if (pk == NULL || p != spki + spki_len) {
113 OPENSSL_PUT_ERROR(X509, X509_R_PUBLIC_KEY_DECODE_ERROR);
114 goto error;
115 }
116
117 OPENSSL_free(spki);
118 X509_PUBKEY_free(*x);
119 *x = pk;
120
121 return 1;
122 error:
123 X509_PUBKEY_free(pk);
124 OPENSSL_free(spki);
125 return 0;
126 }
127
128 /* g_pubkey_lock is used to protect the initialisation of the |pkey| member of
129 * |X509_PUBKEY| objects. Really |X509_PUBKEY| should have a |CRYPTO_once_t|
130 * inside it for this, but |CRYPTO_once_t| is private and |X509_PUBKEY| is
131 * not. */
132 static struct CRYPTO_STATIC_MUTEX g_pubkey_lock = CRYPTO_STATIC_MUTEX_INIT;
133
X509_PUBKEY_get(X509_PUBKEY * key)134 EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
135 {
136 EVP_PKEY *ret = NULL;
137 uint8_t *spki = NULL;
138
139 if (key == NULL)
140 goto error;
141
142 CRYPTO_STATIC_MUTEX_lock_read(&g_pubkey_lock);
143 if (key->pkey != NULL) {
144 CRYPTO_STATIC_MUTEX_unlock_read(&g_pubkey_lock);
145 EVP_PKEY_up_ref(key->pkey);
146 return key->pkey;
147 }
148 CRYPTO_STATIC_MUTEX_unlock_read(&g_pubkey_lock);
149
150 /* Re-encode the |X509_PUBKEY| to DER and parse it. */
151 int spki_len = i2d_X509_PUBKEY(key, &spki);
152 if (spki_len < 0) {
153 goto error;
154 }
155 CBS cbs;
156 CBS_init(&cbs, spki, (size_t)spki_len);
157 ret = EVP_parse_public_key(&cbs);
158 if (ret == NULL || CBS_len(&cbs) != 0) {
159 OPENSSL_PUT_ERROR(X509, X509_R_PUBLIC_KEY_DECODE_ERROR);
160 goto error;
161 }
162
163 /* Check to see if another thread set key->pkey first */
164 CRYPTO_STATIC_MUTEX_lock_write(&g_pubkey_lock);
165 if (key->pkey) {
166 CRYPTO_STATIC_MUTEX_unlock_write(&g_pubkey_lock);
167 EVP_PKEY_free(ret);
168 ret = key->pkey;
169 } else {
170 key->pkey = ret;
171 CRYPTO_STATIC_MUTEX_unlock_write(&g_pubkey_lock);
172 }
173
174 OPENSSL_free(spki);
175 EVP_PKEY_up_ref(ret);
176 return ret;
177
178 error:
179 OPENSSL_free(spki);
180 EVP_PKEY_free(ret);
181 return NULL;
182 }
183
X509_PUBKEY_set0_param(X509_PUBKEY * pub,ASN1_OBJECT * obj,int param_type,void * param_value,uint8_t * key,int key_len)184 int X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *obj, int param_type,
185 void *param_value, uint8_t *key, int key_len)
186 {
187 if (!X509_ALGOR_set0(pub->algor, obj, param_type, param_value)) {
188 return 0;
189 }
190
191 ASN1_STRING_set0(pub->public_key, key, key_len);
192 /* Set the number of unused bits to zero. */
193 pub->public_key->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
194 pub->public_key->flags |= ASN1_STRING_FLAG_BITS_LEFT;
195 return 1;
196 }
197
X509_PUBKEY_get0_param(ASN1_OBJECT ** out_obj,const uint8_t ** out_key,int * out_key_len,X509_ALGOR ** out_alg,X509_PUBKEY * pub)198 int X509_PUBKEY_get0_param(ASN1_OBJECT **out_obj, const uint8_t **out_key,
199 int *out_key_len, X509_ALGOR **out_alg,
200 X509_PUBKEY *pub)
201 {
202 if (out_obj != NULL) {
203 *out_obj = pub->algor->algorithm;
204 }
205 if (out_key != NULL) {
206 *out_key = pub->public_key->data;
207 *out_key_len = pub->public_key->length;
208 }
209 if (out_alg != NULL) {
210 *out_alg = pub->algor;
211 }
212 return 1;
213 }
214
X509_PUBKEY_get0_public_key(const X509_PUBKEY * pub)215 const ASN1_BIT_STRING *X509_PUBKEY_get0_public_key(const X509_PUBKEY *pub) {
216 return pub->public_key;
217 }
218