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)
89 unsigned char *s,*p = NULL;
92 if (x == NULL) return(0);
94 if ((pk=X509_PUBKEY_new()) == NULL) goto err;
97 /* set the algorithm id */
98 if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err;
99 ASN1_OBJECT_free(a->algorithm);
102 /* Set the parameter list */
103 if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA))
105 if ((a->parameter == NULL) ||
106 (a->parameter->type != V_ASN1_NULL))
108 ASN1_TYPE_free(a->parameter);
109 if (!(a->parameter=ASN1_TYPE_new()))
111 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
114 a->parameter->type=V_ASN1_NULL;
117 #ifndef OPENSSL_NO_DSA
118 else if (pkey->type == EVP_PKEY_DSA)
125 ASN1_TYPE_free(a->parameter);
126 if ((i=i2d_DSAparams(dsa,NULL)) <= 0)
128 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()))
138 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
141 a->parameter->type=V_ASN1_SEQUENCE;
142 if (!(a->parameter->value.sequence=ASN1_STRING_new()))
145 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
148 if (!ASN1_STRING_set(a->parameter->value.sequence,p,i))
151 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
157 #ifndef OPENSSL_NO_EC
158 else if (pkey->type == EVP_PKEY_EC)
164 eckey = pkey->pkey.eckey;
165 ASN1_TYPE_free(a->parameter);
167 if ((a->parameter = ASN1_TYPE_new()) == NULL)
169 X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
173 if (EC_GROUP_get_asn1_flag(eckey->group)
174 && (nid = EC_GROUP_get_curve_name(eckey->group)))
176 /* just set the OID */
177 a->parameter->type = V_ASN1_OBJECT;
178 a->parameter->value.object = OBJ_nid2obj(nid);
180 else /* explicit parameters */
182 if ((i = i2d_ECParameters(eckey, NULL)) == 0)
184 X509err(X509_F_X509_PUBKEY_SET, ERR_R_EC_LIB);
187 if ((p = (unsigned char *) OPENSSL_malloc(i)) == NULL)
189 X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE);
193 if (!i2d_ECParameters(eckey, &pp))
195 X509err(X509_F_X509_PUBKEY_SET, ERR_R_EC_LIB);
199 a->parameter->type = V_ASN1_SEQUENCE;
200 if ((a->parameter->value.sequence = ASN1_STRING_new()) == NULL)
202 X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
206 ASN1_STRING_set(a->parameter->value.sequence, p, i);
213 X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
217 if ((i=i2d_PublicKey(pkey,NULL)) <= 0) goto err;
218 if ((s=(unsigned char *)OPENSSL_malloc(i+1)) == NULL)
220 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
224 i2d_PublicKey(pkey,&p);
225 if (!M_ASN1_BIT_STRING_set(pk->public_key,s,i))
227 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
230 /* Set number of unused bits to zero */
231 pk->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
232 pk->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT;
237 CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
242 X509_PUBKEY_free(*x);
248 if (pk != NULL) X509_PUBKEY_free(pk);
252 EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
257 const unsigned char *p;
258 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
259 const unsigned char *cp;
263 if (key == NULL) goto err;
265 if (key->pkey != NULL)
267 CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
271 if (key->public_key == NULL) goto err;
273 type=OBJ_obj2nid(key->algor->algorithm);
274 if ((ret = EVP_PKEY_new()) == NULL)
276 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
279 ret->type = EVP_PKEY_type(type);
281 /* the parameters must be extracted before the public key (ECDSA!) */
283 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
289 #ifndef OPENSSL_NO_DSA
290 else if (ret->type == EVP_PKEY_DSA)
292 if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
294 if ((ret->pkey.dsa = DSA_new()) == NULL)
296 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
299 ret->pkey.dsa->write_params=0;
300 cp=p=a->parameter->value.sequence->data;
301 j=a->parameter->value.sequence->length;
302 if (!d2i_DSAparams(&ret->pkey.dsa, &cp, (long)j))
305 ret->save_parameters=1;
308 #ifndef OPENSSL_NO_EC
309 else if (ret->type == EVP_PKEY_EC)
311 if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
313 /* type == V_ASN1_SEQUENCE => we have explicit parameters
314 * (e.g. parameters in the X9_62_EC_PARAMETERS-structure )
316 if ((ret->pkey.eckey= EC_KEY_new()) == NULL)
318 X509err(X509_F_X509_PUBKEY_GET,
319 ERR_R_MALLOC_FAILURE);
322 cp = p = a->parameter->value.sequence->data;
323 j = a->parameter->value.sequence->length;
324 if (!d2i_ECParameters(&ret->pkey.eckey, &cp, (long)j))
326 X509err(X509_F_X509_PUBKEY_GET, ERR_R_EC_LIB);
330 else if (a->parameter && (a->parameter->type == V_ASN1_OBJECT))
332 /* type == V_ASN1_OBJECT => the parameters are given
336 if (ret->pkey.eckey == NULL)
337 ret->pkey.eckey = EC_KEY_new();
338 eckey = ret->pkey.eckey;
340 EC_GROUP_free(eckey->group);
341 if ((eckey->group = EC_GROUP_new_by_nid(
342 OBJ_obj2nid(a->parameter->value.object))) == NULL)
344 EC_GROUP_set_asn1_flag(eckey->group,
345 OPENSSL_EC_NAMED_CURVE);
347 /* the case implicitlyCA is currently not implemented */
348 ret->save_parameters = 1;
352 p=key->public_key->data;
353 j=key->public_key->length;
354 if (!d2i_PublicKey(type, &ret, &p, (long)j))
356 X509err(X509_F_X509_PUBKEY_GET, X509_R_ERR_ASN1_LIB);
361 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY);
369 /* Now two pseudo ASN1 routines that take an EVP_PKEY structure
370 * and encode or decode as X509_PUBKEY
373 EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp,
378 xpk = d2i_X509_PUBKEY(NULL, pp, length);
379 if(!xpk) return NULL;
380 pktmp = X509_PUBKEY_get(xpk);
381 X509_PUBKEY_free(xpk);
382 if(!pktmp) return NULL;
391 int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
393 X509_PUBKEY *xpk=NULL;
396 if(!X509_PUBKEY_set(&xpk, a)) return 0;
397 ret = i2d_X509_PUBKEY(xpk, pp);
398 X509_PUBKEY_free(xpk);
402 /* The following are equivalents but which return RSA and DSA
405 #ifndef OPENSSL_NO_RSA
406 RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp,
411 const unsigned char *q;
413 pkey = d2i_PUBKEY(NULL, &q, length);
414 if (!pkey) return NULL;
415 key = EVP_PKEY_get1_RSA(pkey);
417 if (!key) return NULL;
427 int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
432 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,
451 const unsigned char *q;
453 pkey = d2i_PUBKEY(NULL, &q, length);
454 if (!pkey) return NULL;
455 key = EVP_PKEY_get1_DSA(pkey);
457 if (!key) return NULL;
467 int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
472 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);
493 if (!pkey) return(NULL);
494 key = EVP_PKEY_get1_EC_KEY(pkey);
496 if (!key) return(NULL);
506 int i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp)
511 if ((pktmp = EVP_PKEY_new()) == NULL)
513 ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE);
516 EVP_PKEY_set1_EC_KEY(pktmp, a);
517 ret = i2d_PUBKEY(pktmp, pp);
518 EVP_PKEY_free(pktmp);