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>
64 /* Minor tweak to operation: free up EVP_PKEY */
65 static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)
67 if (operation == ASN1_OP_FREE_POST)
69 X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
70 EVP_PKEY_free(pubkey->pkey);
75 ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = {
76 ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR),
77 ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING)
78 } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY)
80 IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY)
82 int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
88 unsigned char *s,*p = NULL;
91 if (x == NULL) return(0);
93 if ((pk=X509_PUBKEY_new()) == NULL) goto err;
96 /* set the algorithm id */
97 if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err;
98 ASN1_OBJECT_free(a->algorithm);
101 /* Set the parameter list */
102 if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA))
104 if ((a->parameter == NULL) ||
105 (a->parameter->type != V_ASN1_NULL))
107 ASN1_TYPE_free(a->parameter);
108 a->parameter=ASN1_TYPE_new();
109 a->parameter->type=V_ASN1_NULL;
112 #ifndef OPENSSL_NO_DSA
113 else if (pkey->type == EVP_PKEY_DSA)
120 ASN1_TYPE_free(a->parameter);
121 i=i2d_DSAparams(dsa,NULL);
122 p=(unsigned char *)OPENSSL_malloc(i);
124 i2d_DSAparams(dsa,&pp);
125 a->parameter=ASN1_TYPE_new();
126 a->parameter->type=V_ASN1_SEQUENCE;
127 a->parameter->value.sequence=ASN1_STRING_new();
128 ASN1_STRING_set(a->parameter->value.sequence,p,i);
132 #ifndef OPENSSL_NO_ECDSA
133 else if (pkey->type == EVP_PKEY_ECDSA)
139 ecdsa = pkey->pkey.ecdsa;
140 ASN1_TYPE_free(a->parameter);
142 if ((a->parameter = ASN1_TYPE_new()) == NULL)
144 X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
148 if ((ECDSA_get_parameter_flags(ecdsa) & ECDSA_FLAG_NAMED_CURVE) && (nid = EC_GROUP_get_nid(ecdsa->group)))
150 /* just set the OID */
151 a->parameter->type = V_ASN1_OBJECT;
152 a->parameter->value.object = OBJ_nid2obj(nid);
154 else /* explicit parameters */
156 if ((i = i2d_ECDSAParameters(ecdsa, NULL)) == 0)
158 X509err(X509_F_X509_PUBKEY_SET, ERR_R_ECDSA_LIB);
161 if ((p = (unsigned char *) OPENSSL_malloc(i)) == NULL)
163 X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE);
167 if (!i2d_ECDSAParameters(ecdsa, &pp))
169 X509err(X509_F_X509_PUBKEY_SET, ERR_R_ECDSA_LIB);
173 a->parameter->type = V_ASN1_SEQUENCE;
174 if ((a->parameter->value.sequence = ASN1_STRING_new()) == NULL)
176 X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
180 ASN1_STRING_set(a->parameter->value.sequence, p, i);
187 X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
191 if ((i=i2d_PublicKey(pkey,NULL)) <= 0) goto err;
192 if ((s=(unsigned char *)OPENSSL_malloc(i+1)) == NULL) goto err;
194 i2d_PublicKey(pkey,&p);
195 if (!M_ASN1_BIT_STRING_set(pk->public_key,s,i)) goto err;
196 /* Set number of unused bits to zero */
197 pk->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
198 pk->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT;
203 CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
208 X509_PUBKEY_free(*x);
215 if (pk != NULL) X509_PUBKEY_free(pk);
219 EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
225 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
226 const unsigned char *cp;
230 if (key == NULL) goto err;
232 if (key->pkey != NULL)
234 CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
238 if (key->public_key == NULL) goto err;
240 type=OBJ_obj2nid(key->algor->algorithm);
241 if ((ret = EVP_PKEY_new()) == NULL)
243 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
246 ret->type = EVP_PKEY_type(type);
248 /* the parameters must be extracted before the public key (ECDSA!) */
250 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
256 #ifndef OPENSSL_NO_DSA
257 else if (ret->type == EVP_PKEY_DSA)
259 if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
261 if ((ret->pkey.dsa = DSA_new()) == NULL)
263 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
266 ret->pkey.dsa->write_params=0;
267 cp=p=a->parameter->value.sequence->data;
268 j=a->parameter->value.sequence->length;
269 if (!d2i_DSAparams(&ret->pkey.dsa, &cp, (long)j))
272 ret->save_parameters=1;
275 #ifndef OPENSSL_NO_ECDSA
276 else if (ret->type == EVP_PKEY_ECDSA)
278 if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
280 /* type == V_ASN1_SEQUENCE => we have explicit parameters
281 * (e.g. parameters in the X9_62_EC_PARAMETERS-structure )
283 if ((ret->pkey.ecdsa= ECDSA_new()) == NULL)
285 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
288 cp = p = a->parameter->value.sequence->data;
289 j = a->parameter->value.sequence->length;
290 if (!d2i_ECDSAParameters(&ret->pkey.ecdsa, &cp, (long)j))
292 X509err(X509_F_X509_PUBKEY_GET, ERR_R_ECDSA_LIB);
296 else if (a->parameter && (a->parameter->type == V_ASN1_OBJECT))
298 /* type == V_ASN1_OBJECT => the parameters are given
301 if (ret->pkey.ecdsa == NULL)
302 ret->pkey.ecdsa = ECDSA_new();
303 if (ret->pkey.ecdsa->group)
304 EC_GROUP_free(ret->pkey.ecdsa->group);
305 ret->pkey.ecdsa->parameter_flags |= ECDSA_FLAG_NAMED_CURVE;
306 if ((ret->pkey.ecdsa->group = EC_GROUP_new_by_name(OBJ_obj2nid(a->parameter->value.object))) == NULL)
309 /* the case implicitlyCA is currently not implemented */
310 ret->save_parameters = 1;
314 p=key->public_key->data;
315 j=key->public_key->length;
316 if ((ret = d2i_PublicKey(type, &ret, &p, (long)j)) == NULL)
318 X509err(X509_F_X509_PUBKEY_GET, X509_R_ERR_ASN1_LIB);
323 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY);
331 /* Now two pseudo ASN1 routines that take an EVP_PKEY structure
332 * and encode or decode as X509_PUBKEY
335 EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, unsigned char **pp,
340 xpk = d2i_X509_PUBKEY(NULL, pp, length);
341 if(!xpk) return NULL;
342 pktmp = X509_PUBKEY_get(xpk);
343 X509_PUBKEY_free(xpk);
344 if(!pktmp) return NULL;
353 int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
355 X509_PUBKEY *xpk=NULL;
358 if(!X509_PUBKEY_set(&xpk, a)) return 0;
359 ret = i2d_X509_PUBKEY(xpk, pp);
360 X509_PUBKEY_free(xpk);
364 /* The following are equivalents but which return RSA and DSA
367 #ifndef OPENSSL_NO_RSA
368 RSA *d2i_RSA_PUBKEY(RSA **a, unsigned char **pp,
375 pkey = d2i_PUBKEY(NULL, &q, length);
376 if (!pkey) return NULL;
377 key = EVP_PKEY_get1_RSA(pkey);
379 if (!key) return NULL;
389 int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
394 pktmp = EVP_PKEY_new();
397 ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE);
400 EVP_PKEY_set1_RSA(pktmp, a);
401 ret = i2d_PUBKEY(pktmp, pp);
402 EVP_PKEY_free(pktmp);
407 #ifndef OPENSSL_NO_DSA
408 DSA *d2i_DSA_PUBKEY(DSA **a, unsigned char **pp,
415 pkey = d2i_PUBKEY(NULL, &q, length);
416 if (!pkey) return NULL;
417 key = EVP_PKEY_get1_DSA(pkey);
419 if (!key) return NULL;
429 int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
434 pktmp = EVP_PKEY_new();
437 ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE);
440 EVP_PKEY_set1_DSA(pktmp, a);
441 ret = i2d_PUBKEY(pktmp, pp);
442 EVP_PKEY_free(pktmp);
447 #ifndef OPENSSL_NO_ECDSA
448 ECDSA *d2i_ECDSA_PUBKEY(ECDSA **a, unsigned char **pp, long length)
454 pkey = d2i_PUBKEY(NULL, &q, length);
455 if (!pkey) return(NULL);
456 key = EVP_PKEY_get1_ECDSA(pkey);
458 if (!key) return(NULL);
468 int i2d_ECDSA_PUBKEY(ECDSA *a, unsigned char **pp)
473 if ((pktmp = EVP_PKEY_new()) == NULL)
475 ASN1err(ASN1_F_I2D_ECDSA_PUBKEY, ERR_R_MALLOC_FAILURE);
478 EVP_PKEY_set1_ECDSA(pktmp, a);
479 ret = i2d_PUBKEY(pktmp, pp);
480 EVP_PKEY_free(pktmp);