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 #include <openssl/rsa.h>
64 #include <openssl/dsa.h>
66 /* Minor tweak to operation: free up EVP_PKEY */
67 static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)
69 if (operation == ASN1_OP_FREE_POST)
71 X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
72 EVP_PKEY_free(pubkey->pkey);
77 ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = {
78 ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR),
79 ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING)
80 } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY)
82 IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY)
84 int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
90 unsigned char *s,*p = NULL;
93 if (x == NULL) return(0);
95 if ((pk=X509_PUBKEY_new()) == NULL) goto err;
98 /* set the algorithm id */
99 if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err;
100 ASN1_OBJECT_free(a->algorithm);
103 /* Set the parameter list */
104 if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA))
106 if ((a->parameter == NULL) ||
107 (a->parameter->type != V_ASN1_NULL))
109 ASN1_TYPE_free(a->parameter);
110 a->parameter=ASN1_TYPE_new();
111 a->parameter->type=V_ASN1_NULL;
114 #ifndef OPENSSL_NO_DSA
115 else if (pkey->type == EVP_PKEY_DSA)
122 ASN1_TYPE_free(a->parameter);
123 i=i2d_DSAparams(dsa,NULL);
124 if ((p=(unsigned char *)OPENSSL_malloc(i)) == NULL) goto err;
126 i2d_DSAparams(dsa,&pp);
127 a->parameter=ASN1_TYPE_new();
128 a->parameter->type=V_ASN1_SEQUENCE;
129 a->parameter->value.sequence=ASN1_STRING_new();
130 ASN1_STRING_set(a->parameter->value.sequence,p,i);
134 #ifndef OPENSSL_NO_EC
135 else if (pkey->type == EVP_PKEY_EC)
141 eckey = pkey->pkey.eckey;
142 ASN1_TYPE_free(a->parameter);
144 if ((a->parameter = ASN1_TYPE_new()) == NULL)
146 X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
150 if (EC_GROUP_get_asn1_flag(eckey->group)
151 && (nid = EC_GROUP_get_nid(eckey->group)))
153 /* just set the OID */
154 a->parameter->type = V_ASN1_OBJECT;
155 a->parameter->value.object = OBJ_nid2obj(nid);
157 else /* explicit parameters */
159 if ((i = i2d_ECParameters(eckey, NULL)) == 0)
161 X509err(X509_F_X509_PUBKEY_SET, ERR_R_EC_LIB);
164 if ((p = (unsigned char *) OPENSSL_malloc(i)) == NULL)
166 X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE);
170 if (!i2d_ECParameters(eckey, &pp))
172 X509err(X509_F_X509_PUBKEY_SET, ERR_R_EC_LIB);
176 a->parameter->type = V_ASN1_SEQUENCE;
177 if ((a->parameter->value.sequence = ASN1_STRING_new()) == NULL)
179 X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
183 ASN1_STRING_set(a->parameter->value.sequence, p, i);
190 X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
194 if ((i=i2d_PublicKey(pkey,NULL)) <= 0) goto err;
195 if ((s=(unsigned char *)OPENSSL_malloc(i+1)) == NULL)
197 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
201 i2d_PublicKey(pkey,&p);
202 if (!M_ASN1_BIT_STRING_set(pk->public_key,s,i)) goto err;
203 /* Set number of unused bits to zero */
204 pk->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
205 pk->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT;
210 CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
215 X509_PUBKEY_free(*x);
222 if (pk != NULL) X509_PUBKEY_free(pk);
226 EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
231 const unsigned char *p;
232 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
233 const unsigned char *cp;
237 if (key == NULL) goto err;
239 if (key->pkey != NULL)
241 CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
245 if (key->public_key == NULL) goto err;
247 type=OBJ_obj2nid(key->algor->algorithm);
248 if ((ret = EVP_PKEY_new()) == NULL)
250 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
253 ret->type = EVP_PKEY_type(type);
255 /* the parameters must be extracted before the public key (ECDSA!) */
257 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
263 #ifndef OPENSSL_NO_DSA
264 else if (ret->type == EVP_PKEY_DSA)
266 if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
268 if ((ret->pkey.dsa = DSA_new()) == NULL)
270 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
273 ret->pkey.dsa->write_params=0;
274 cp=p=a->parameter->value.sequence->data;
275 j=a->parameter->value.sequence->length;
276 if (!d2i_DSAparams(&ret->pkey.dsa, &cp, (long)j))
279 ret->save_parameters=1;
282 #ifndef OPENSSL_NO_EC
283 else if (ret->type == EVP_PKEY_EC)
285 if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
287 /* type == V_ASN1_SEQUENCE => we have explicit parameters
288 * (e.g. parameters in the X9_62_EC_PARAMETERS-structure )
290 if ((ret->pkey.eckey= EC_KEY_new()) == NULL)
292 X509err(X509_F_X509_PUBKEY_GET,
293 ERR_R_MALLOC_FAILURE);
296 cp = p = a->parameter->value.sequence->data;
297 j = a->parameter->value.sequence->length;
298 if (!d2i_ECParameters(&ret->pkey.eckey, &cp, (long)j))
300 X509err(X509_F_X509_PUBKEY_GET, ERR_R_EC_LIB);
304 else if (a->parameter && (a->parameter->type == V_ASN1_OBJECT))
306 /* type == V_ASN1_OBJECT => the parameters are given
310 if (ret->pkey.eckey == NULL)
311 ret->pkey.eckey = EC_KEY_new();
312 eckey = ret->pkey.eckey;
314 EC_GROUP_free(eckey->group);
315 if ((eckey->group = EC_GROUP_new_by_nid(
316 OBJ_obj2nid(a->parameter->value.object))) == NULL)
318 EC_GROUP_set_asn1_flag(eckey->group,
319 OPENSSL_EC_NAMED_CURVE);
321 /* the case implicitlyCA is currently not implemented */
322 ret->save_parameters = 1;
326 p=key->public_key->data;
327 j=key->public_key->length;
328 if (!d2i_PublicKey(type, &ret, &p, (long)j))
330 X509err(X509_F_X509_PUBKEY_GET, X509_R_ERR_ASN1_LIB);
335 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY);
343 /* Now two pseudo ASN1 routines that take an EVP_PKEY structure
344 * and encode or decode as X509_PUBKEY
347 EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp,
352 xpk = d2i_X509_PUBKEY(NULL, pp, length);
353 if(!xpk) return NULL;
354 pktmp = X509_PUBKEY_get(xpk);
355 X509_PUBKEY_free(xpk);
356 if(!pktmp) return NULL;
365 int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
367 X509_PUBKEY *xpk=NULL;
370 if(!X509_PUBKEY_set(&xpk, a)) return 0;
371 ret = i2d_X509_PUBKEY(xpk, pp);
372 X509_PUBKEY_free(xpk);
376 /* The following are equivalents but which return RSA and DSA
379 #ifndef OPENSSL_NO_RSA
380 RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp,
385 const unsigned char *q;
387 pkey = d2i_PUBKEY(NULL, &q, length);
388 if (!pkey) return NULL;
389 key = EVP_PKEY_get1_RSA(pkey);
391 if (!key) return NULL;
401 int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
406 pktmp = EVP_PKEY_new();
409 ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE);
412 EVP_PKEY_set1_RSA(pktmp, a);
413 ret = i2d_PUBKEY(pktmp, pp);
414 EVP_PKEY_free(pktmp);
419 #ifndef OPENSSL_NO_DSA
420 DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp,
425 const unsigned char *q;
427 pkey = d2i_PUBKEY(NULL, &q, length);
428 if (!pkey) return NULL;
429 key = EVP_PKEY_get1_DSA(pkey);
431 if (!key) return NULL;
441 int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
446 pktmp = EVP_PKEY_new();
449 ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE);
452 EVP_PKEY_set1_DSA(pktmp, a);
453 ret = i2d_PUBKEY(pktmp, pp);
454 EVP_PKEY_free(pktmp);
459 #ifndef OPENSSL_NO_EC
460 EC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length)
464 const unsigned char *q;
466 pkey = d2i_PUBKEY(NULL, &q, length);
467 if (!pkey) return(NULL);
468 key = EVP_PKEY_get1_EC_KEY(pkey);
470 if (!key) return(NULL);
480 int i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp)
485 if ((pktmp = EVP_PKEY_new()) == NULL)
487 ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE);
490 EVP_PKEY_set1_EC_KEY(pktmp, a);
491 ret = i2d_PUBKEY(pktmp, pp);
492 EVP_PKEY_free(pktmp);