1 /* crypto/asn1/x_pubkey.c */
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/asn1t.h>
62 #include <openssl/x509.h>
63 #ifndef OPENSSL_NO_RSA
64 # include <openssl/rsa.h>
66 #ifndef OPENSSL_NO_DSA
67 # include <openssl/dsa.h>
70 /* Minor tweak to operation: free up EVP_PKEY */
71 static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)
73 if (operation == ASN1_OP_FREE_POST) {
74 X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
75 EVP_PKEY_free(pubkey->pkey);
80 ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = {
81 ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR),
82 ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING)
83 } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY)
85 IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY)
87 int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
89 X509_PUBKEY *pk = NULL;
92 unsigned char *s, *p = NULL;
98 if ((pk = X509_PUBKEY_new()) == NULL)
102 /* set the algorithm id */
103 if ((o = OBJ_nid2obj(pkey->type)) == NULL)
105 ASN1_OBJECT_free(a->algorithm);
108 /* Set the parameter list */
109 if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA)) {
110 if ((a->parameter == NULL) || (a->parameter->type != V_ASN1_NULL)) {
111 ASN1_TYPE_free(a->parameter);
112 if (!(a->parameter = ASN1_TYPE_new())) {
113 X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE);
116 a->parameter->type = V_ASN1_NULL;
119 #ifndef OPENSSL_NO_DSA
120 else if (pkey->type == EVP_PKEY_DSA) {
124 dsa = pkey->pkey.dsa;
125 dsa->write_params = 0;
126 ASN1_TYPE_free(a->parameter);
127 if ((i = i2d_DSAparams(dsa, NULL)) <= 0)
129 if (!(p = (unsigned char *)OPENSSL_malloc(i))) {
130 X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE);
134 i2d_DSAparams(dsa, &pp);
135 if (!(a->parameter = ASN1_TYPE_new())) {
137 X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE);
140 a->parameter->type = V_ASN1_SEQUENCE;
141 if (!(a->parameter->value.sequence = ASN1_STRING_new())) {
143 X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE);
146 if (!ASN1_STRING_set(a->parameter->value.sequence, p, i)) {
148 X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE);
154 #ifndef OPENSSL_NO_EC
155 else if (pkey->type == EVP_PKEY_EC) {
159 const EC_GROUP *group;
161 ec_key = pkey->pkey.ec;
162 ASN1_TYPE_free(a->parameter);
164 if ((a->parameter = ASN1_TYPE_new()) == NULL) {
165 X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
169 group = EC_KEY_get0_group(ec_key);
170 if (EC_GROUP_get_asn1_flag(group)
171 && (nid = EC_GROUP_get_curve_name(group))) {
172 /* just set the OID */
173 a->parameter->type = V_ASN1_OBJECT;
174 a->parameter->value.object = OBJ_nid2obj(nid);
175 } else { /* explicit parameters */
177 if ((i = i2d_ECParameters(ec_key, NULL)) == 0) {
178 X509err(X509_F_X509_PUBKEY_SET, ERR_R_EC_LIB);
181 if ((p = (unsigned char *)OPENSSL_malloc(i)) == NULL) {
182 X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE);
186 if (!i2d_ECParameters(ec_key, &pp)) {
187 X509err(X509_F_X509_PUBKEY_SET, ERR_R_EC_LIB);
191 a->parameter->type = V_ASN1_SEQUENCE;
192 if ((a->parameter->value.sequence = ASN1_STRING_new()) == NULL) {
193 X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
197 ASN1_STRING_set(a->parameter->value.sequence, p, i);
203 X509err(X509_F_X509_PUBKEY_SET, X509_R_UNSUPPORTED_ALGORITHM);
207 if ((i = i2d_PublicKey(pkey, NULL)) <= 0)
209 if ((s = (unsigned char *)OPENSSL_malloc(i + 1)) == NULL) {
210 X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE);
214 i2d_PublicKey(pkey, &p);
215 if (!M_ASN1_BIT_STRING_set(pk->public_key, s, i)) {
216 X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE);
219 /* Set number of unused bits to zero */
220 pk->public_key->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
221 pk->public_key->flags |= ASN1_STRING_FLAG_BITS_LEFT;
226 CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
231 X509_PUBKEY_free(*x);
238 X509_PUBKEY_free(pk);
242 EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
244 EVP_PKEY *ret = NULL;
247 const unsigned char *p;
248 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
249 const unsigned char *cp;
256 if (key->pkey != NULL) {
257 CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
261 if (key->public_key == NULL)
264 type = OBJ_obj2nid(key->algor->algorithm);
265 if ((ret = EVP_PKEY_new()) == NULL) {
266 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
269 ret->type = EVP_PKEY_type(type);
271 /* the parameters must be extracted before the public key (ECDSA!) */
273 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
278 #ifndef OPENSSL_NO_DSA
279 else if (ret->type == EVP_PKEY_DSA) {
280 if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE)) {
281 if ((ret->pkey.dsa = DSA_new()) == NULL) {
282 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
285 ret->pkey.dsa->write_params = 0;
286 cp = p = a->parameter->value.sequence->data;
287 j = a->parameter->value.sequence->length;
288 if (!d2i_DSAparams(&ret->pkey.dsa, &cp, (long)j))
291 ret->save_parameters = 1;
294 #ifndef OPENSSL_NO_EC
295 else if (ret->type == EVP_PKEY_EC) {
296 if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE)) {
298 * type == V_ASN1_SEQUENCE => we have explicit parameters (e.g.
299 * parameters in the X9_62_EC_PARAMETERS-structure )
301 if ((ret->pkey.ec = EC_KEY_new()) == NULL) {
302 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
305 cp = p = a->parameter->value.sequence->data;
306 j = a->parameter->value.sequence->length;
307 if (!d2i_ECParameters(&ret->pkey.ec, &cp, (long)j)) {
308 X509err(X509_F_X509_PUBKEY_GET, ERR_R_EC_LIB);
311 } else if (a->parameter && (a->parameter->type == V_ASN1_OBJECT)) {
313 * type == V_ASN1_OBJECT => the parameters are given by an asn1
319 if (ret->pkey.ec == NULL)
320 ret->pkey.ec = EC_KEY_new();
321 ec_key = ret->pkey.ec;
325 EC_GROUP_new_by_curve_name(OBJ_obj2nid
326 (a->parameter->value.object));
329 EC_GROUP_set_asn1_flag(group, OPENSSL_EC_NAMED_CURVE);
330 if (EC_KEY_set_group(ec_key, group) == 0)
332 EC_GROUP_free(group);
335 * the case implicitlyCA is currently not implemented
337 ret->save_parameters = 1;
341 p = key->public_key->data;
342 j = key->public_key->length;
343 if (!d2i_PublicKey(type, &ret, &p, (long)j)) {
344 X509err(X509_F_X509_PUBKEY_GET, X509_R_ERR_ASN1_LIB);
348 /* Check to see if another thread set key->pkey first */
349 CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY);
351 CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
356 CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
358 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY);
367 * Now two pseudo ASN1 routines that take an EVP_PKEY structure and encode or
368 * decode as X509_PUBKEY
371 EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length)
375 xpk = d2i_X509_PUBKEY(NULL, pp, length);
378 pktmp = X509_PUBKEY_get(xpk);
379 X509_PUBKEY_free(xpk);
389 int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
391 X509_PUBKEY *xpk = NULL;
395 if (!X509_PUBKEY_set(&xpk, a))
397 ret = i2d_X509_PUBKEY(xpk, pp);
398 X509_PUBKEY_free(xpk);
403 * The following are equivalents but which return RSA and DSA keys
405 #ifndef OPENSSL_NO_RSA
406 RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, long length)
410 const unsigned char *q;
412 pkey = d2i_PUBKEY(NULL, &q, length);
415 key = EVP_PKEY_get1_RSA(pkey);
427 int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
433 pktmp = EVP_PKEY_new();
435 ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE);
438 EVP_PKEY_set1_RSA(pktmp, a);
439 ret = i2d_PUBKEY(pktmp, pp);
440 EVP_PKEY_free(pktmp);
445 #ifndef OPENSSL_NO_DSA
446 DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length)
450 const unsigned char *q;
452 pkey = d2i_PUBKEY(NULL, &q, length);
455 key = EVP_PKEY_get1_DSA(pkey);
467 int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
473 pktmp = EVP_PKEY_new();
475 ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE);
478 EVP_PKEY_set1_DSA(pktmp, a);
479 ret = i2d_PUBKEY(pktmp, pp);
480 EVP_PKEY_free(pktmp);
485 #ifndef OPENSSL_NO_EC
486 EC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length)
490 const unsigned char *q;
492 pkey = d2i_PUBKEY(NULL, &q, length);
495 key = EVP_PKEY_get1_EC_KEY(pkey);
507 int i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp)
513 if ((pktmp = EVP_PKEY_new()) == NULL) {
514 ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE);
517 EVP_PKEY_set1_EC_KEY(pktmp, a);
518 ret = i2d_PUBKEY(pktmp, pp);
519 EVP_PKEY_free(pktmp);