1 /* $OpenBSD: x_pubkey.c,v 1.24 2015/02/11 03:39:51 jsing Exp $ */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
61 #include <openssl/opensslconf.h>
63 #include <openssl/asn1t.h>
64 #include <openssl/err.h>
65 #include <openssl/x509.h>
67 #ifndef OPENSSL_NO_DSA
68 #include <openssl/dsa.h>
70 #ifndef OPENSSL_NO_RSA
71 #include <openssl/rsa.h>
74 #include "asn1_locl.h"
76 /* Minor tweak to operation: free up EVP_PKEY */
78 pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg)
80 if (operation == ASN1_OP_FREE_POST) {
81 X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
82 EVP_PKEY_free(pubkey->pkey);
87 static const ASN1_AUX X509_PUBKEY_aux = {
90 static const ASN1_TEMPLATE X509_PUBKEY_seq_tt[] = {
92 .offset = offsetof(X509_PUBKEY, algor),
93 .field_name = "algor",
94 .item = &X509_ALGOR_it,
97 .offset = offsetof(X509_PUBKEY, public_key),
98 .field_name = "public_key",
99 .item = &ASN1_BIT_STRING_it,
103 const ASN1_ITEM X509_PUBKEY_it = {
104 .itype = ASN1_ITYPE_SEQUENCE,
105 .utype = V_ASN1_SEQUENCE,
106 .templates = X509_PUBKEY_seq_tt,
107 .tcount = sizeof(X509_PUBKEY_seq_tt) / sizeof(ASN1_TEMPLATE),
108 .funcs = &X509_PUBKEY_aux,
109 .size = sizeof(X509_PUBKEY),
110 .sname = "X509_PUBKEY",
115 d2i_X509_PUBKEY(X509_PUBKEY **a, const unsigned char **in, long len)
117 return (X509_PUBKEY *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
122 i2d_X509_PUBKEY(X509_PUBKEY *a, unsigned char **out)
124 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_PUBKEY_it);
128 X509_PUBKEY_new(void)
130 return (X509_PUBKEY *)ASN1_item_new(&X509_PUBKEY_it);
134 X509_PUBKEY_free(X509_PUBKEY *a)
136 ASN1_item_free((ASN1_VALUE *)a, &X509_PUBKEY_it);
140 X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
142 X509_PUBKEY *pk = NULL;
146 if ((pk = X509_PUBKEY_new()) == NULL)
150 if (pkey->ameth->pub_encode) {
151 if (!pkey->ameth->pub_encode(pk, pkey)) {
152 X509err(X509_F_X509_PUBKEY_SET,
153 X509_R_PUBLIC_KEY_ENCODE_ERROR);
157 X509err(X509_F_X509_PUBKEY_SET,
158 X509_R_METHOD_NOT_SUPPORTED);
162 X509err(X509_F_X509_PUBKEY_SET, X509_R_UNSUPPORTED_ALGORITHM);
167 X509_PUBKEY_free(*x);
175 X509_PUBKEY_free(pk);
180 X509_PUBKEY_get(X509_PUBKEY *key)
182 EVP_PKEY *ret = NULL;
187 if (key->pkey != NULL) {
188 CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
192 if (key->public_key == NULL)
195 if ((ret = EVP_PKEY_new()) == NULL) {
196 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
200 if (!EVP_PKEY_set_type(ret, OBJ_obj2nid(key->algor->algorithm))) {
201 X509err(X509_F_X509_PUBKEY_GET, X509_R_UNSUPPORTED_ALGORITHM);
205 if (ret->ameth->pub_decode) {
206 if (!ret->ameth->pub_decode(ret, key)) {
207 X509err(X509_F_X509_PUBKEY_GET,
208 X509_R_PUBLIC_KEY_DECODE_ERROR);
212 X509err(X509_F_X509_PUBKEY_GET, X509_R_METHOD_NOT_SUPPORTED);
216 /* Check to see if another thread set key->pkey first */
217 CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY);
219 CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
224 CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
226 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY);
235 /* Now two pseudo ASN1 routines that take an EVP_PKEY structure
236 * and encode or decode as X509_PUBKEY
240 d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length)
244 xpk = d2i_X509_PUBKEY(NULL, pp, length);
247 pktmp = X509_PUBKEY_get(xpk);
248 X509_PUBKEY_free(xpk);
259 i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
261 X509_PUBKEY *xpk = NULL;
265 if (!X509_PUBKEY_set(&xpk, a))
267 ret = i2d_X509_PUBKEY(xpk, pp);
268 X509_PUBKEY_free(xpk);
272 /* The following are equivalents but which return RSA and DSA
275 #ifndef OPENSSL_NO_RSA
277 d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, long length)
281 const unsigned char *q;
283 pkey = d2i_PUBKEY(NULL, &q, length);
286 key = EVP_PKEY_get1_RSA(pkey);
299 i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
305 pktmp = EVP_PKEY_new();
307 ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE);
310 EVP_PKEY_set1_RSA(pktmp, a);
311 ret = i2d_PUBKEY(pktmp, pp);
312 EVP_PKEY_free(pktmp);
317 #ifndef OPENSSL_NO_DSA
319 d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length)
323 const unsigned char *q;
325 pkey = d2i_PUBKEY(NULL, &q, length);
328 key = EVP_PKEY_get1_DSA(pkey);
341 i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
347 pktmp = EVP_PKEY_new();
349 ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE);
352 EVP_PKEY_set1_DSA(pktmp, a);
353 ret = i2d_PUBKEY(pktmp, pp);
354 EVP_PKEY_free(pktmp);
359 #ifndef OPENSSL_NO_EC
361 d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length)
365 const unsigned char *q;
367 pkey = d2i_PUBKEY(NULL, &q, length);
370 key = EVP_PKEY_get1_EC_KEY(pkey);
383 i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp)
389 if ((pktmp = EVP_PKEY_new()) == NULL) {
390 ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE);
393 EVP_PKEY_set1_EC_KEY(pktmp, a);
394 ret = i2d_PUBKEY(pktmp, pp);
395 EVP_PKEY_free(pktmp);
401 X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, int ptype,
402 void *pval, unsigned char *penc, int penclen)
404 if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval))
407 free(pub->public_key->data);
408 pub->public_key->data = penc;
409 pub->public_key->length = penclen;
410 /* Set number of unused bits to zero */
411 pub->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
412 pub->public_key->flags |= ASN1_STRING_FLAG_BITS_LEFT;
418 X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, const unsigned char **pk,
419 int *ppklen, X509_ALGOR **pa, X509_PUBKEY *pub)
422 *ppkalg = pub->algor->algorithm;
424 *pk = pub->public_key->data;
425 *ppklen = pub->public_key->length;