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,
74 if (operation == ASN1_OP_FREE_POST)
76 X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
77 EVP_PKEY_free(pubkey->pkey);
82 ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = {
83 ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR),
84 ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING)
85 } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY)
87 IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY)
89 int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
94 unsigned char *s,*p = NULL;
97 if (x == NULL) return(0);
99 if ((pk=X509_PUBKEY_new()) == NULL) goto err;
102 /* set the algorithm id */
103 if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err;
104 ASN1_OBJECT_free(a->algorithm);
107 /* Set the parameter list */
108 if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA))
110 if ((a->parameter == NULL) ||
111 (a->parameter->type != V_ASN1_NULL))
113 ASN1_TYPE_free(a->parameter);
114 if (!(a->parameter=ASN1_TYPE_new()))
116 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
119 a->parameter->type=V_ASN1_NULL;
122 #ifndef OPENSSL_NO_DSA
123 else if (pkey->type == EVP_PKEY_DSA)
130 ASN1_TYPE_free(a->parameter);
131 if ((i=i2d_DSAparams(dsa,NULL)) <= 0)
133 if (!(p=(unsigned char *)OPENSSL_malloc(i)))
135 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
139 i2d_DSAparams(dsa,&pp);
140 if (!(a->parameter=ASN1_TYPE_new()))
143 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
146 a->parameter->type=V_ASN1_SEQUENCE;
147 if (!(a->parameter->value.sequence=ASN1_STRING_new()))
150 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
153 if (!ASN1_STRING_set(a->parameter->value.sequence,p,i))
156 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
162 #ifndef OPENSSL_NO_EC
163 else if (pkey->type == EVP_PKEY_EC)
168 const EC_GROUP *group;
170 ec_key = pkey->pkey.ec;
171 ASN1_TYPE_free(a->parameter);
173 if ((a->parameter = ASN1_TYPE_new()) == NULL)
175 X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
179 group = EC_KEY_get0_group(ec_key);
180 if (EC_GROUP_get_asn1_flag(group)
181 && (nid = EC_GROUP_get_curve_name(group)))
183 /* just set the OID */
184 a->parameter->type = V_ASN1_OBJECT;
185 a->parameter->value.object = OBJ_nid2obj(nid);
187 else /* explicit parameters */
189 if ((i = i2d_ECParameters(ec_key, NULL)) == 0)
191 X509err(X509_F_X509_PUBKEY_SET, ERR_R_EC_LIB);
194 if ((p = (unsigned char *) OPENSSL_malloc(i)) == NULL)
196 X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE);
200 if (!i2d_ECParameters(ec_key, &pp))
202 X509err(X509_F_X509_PUBKEY_SET, ERR_R_EC_LIB);
206 a->parameter->type = V_ASN1_SEQUENCE;
207 if ((a->parameter->value.sequence = ASN1_STRING_new()) == NULL)
209 X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
213 ASN1_STRING_set(a->parameter->value.sequence, p, i);
220 X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
224 if ((i=i2d_PublicKey(pkey,NULL)) <= 0) goto err;
225 if ((s=(unsigned char *)OPENSSL_malloc(i+1)) == NULL)
227 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
231 i2d_PublicKey(pkey,&p);
232 if (!M_ASN1_BIT_STRING_set(pk->public_key,s,i))
234 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
237 /* Set number of unused bits to zero */
238 pk->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
239 pk->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT;
244 CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
249 X509_PUBKEY_free(*x);
255 if (pk != NULL) X509_PUBKEY_free(pk);
259 EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
264 const unsigned char *p;
265 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
266 const unsigned char *cp;
270 if (key == NULL) goto err;
272 if (key->pkey != NULL)
274 CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
278 if (key->public_key == NULL) goto err;
280 type=OBJ_obj2nid(key->algor->algorithm);
281 if ((ret = EVP_PKEY_new()) == NULL)
283 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
286 ret->type = EVP_PKEY_type(type);
288 /* the parameters must be extracted before the public key (ECDSA!) */
290 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
296 #ifndef OPENSSL_NO_DSA
297 else if (ret->type == EVP_PKEY_DSA)
299 if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
301 if ((ret->pkey.dsa = DSA_new()) == NULL)
303 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
306 ret->pkey.dsa->write_params=0;
307 cp=p=a->parameter->value.sequence->data;
308 j=a->parameter->value.sequence->length;
309 if (!d2i_DSAparams(&ret->pkey.dsa, &cp, (long)j))
312 ret->save_parameters=1;
315 #ifndef OPENSSL_NO_EC
316 else if (ret->type == EVP_PKEY_EC)
318 if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
320 /* type == V_ASN1_SEQUENCE => we have explicit parameters
321 * (e.g. parameters in the X9_62_EC_PARAMETERS-structure )
323 if ((ret->pkey.ec= EC_KEY_new()) == NULL)
325 X509err(X509_F_X509_PUBKEY_GET,
326 ERR_R_MALLOC_FAILURE);
329 cp = p = a->parameter->value.sequence->data;
330 j = a->parameter->value.sequence->length;
331 if (!d2i_ECParameters(&ret->pkey.ec, &cp, (long)j))
333 X509err(X509_F_X509_PUBKEY_GET, ERR_R_EC_LIB);
337 else if (a->parameter && (a->parameter->type == V_ASN1_OBJECT))
339 /* type == V_ASN1_OBJECT => the parameters are given
345 if (ret->pkey.ec == NULL)
346 ret->pkey.ec = EC_KEY_new();
347 ec_key = ret->pkey.ec;
350 group = EC_GROUP_new_by_curve_name(OBJ_obj2nid(a->parameter->value.object));
353 EC_GROUP_set_asn1_flag(group, OPENSSL_EC_NAMED_CURVE);
354 if (EC_KEY_set_group(ec_key, group) == 0)
356 EC_GROUP_free(group);
358 /* the case implicitlyCA is currently not implemented */
359 ret->save_parameters = 1;
363 p=key->public_key->data;
364 j=key->public_key->length;
365 if (!d2i_PublicKey(type, &ret, &p, (long)j))
367 X509err(X509_F_X509_PUBKEY_GET, X509_R_ERR_ASN1_LIB);
372 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY);
380 /* Now two pseudo ASN1 routines that take an EVP_PKEY structure
381 * and encode or decode as X509_PUBKEY
384 EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp,
389 xpk = d2i_X509_PUBKEY(NULL, pp, length);
390 if(!xpk) return NULL;
391 pktmp = X509_PUBKEY_get(xpk);
392 X509_PUBKEY_free(xpk);
393 if(!pktmp) return NULL;
402 int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
404 X509_PUBKEY *xpk=NULL;
407 if(!X509_PUBKEY_set(&xpk, a)) return 0;
408 ret = i2d_X509_PUBKEY(xpk, pp);
409 X509_PUBKEY_free(xpk);
413 /* The following are equivalents but which return RSA and DSA
416 #ifndef OPENSSL_NO_RSA
417 RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp,
422 const unsigned char *q;
424 pkey = d2i_PUBKEY(NULL, &q, length);
425 if (!pkey) return NULL;
426 key = EVP_PKEY_get1_RSA(pkey);
428 if (!key) return NULL;
438 int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
443 pktmp = EVP_PKEY_new();
446 ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE);
449 EVP_PKEY_set1_RSA(pktmp, a);
450 ret = i2d_PUBKEY(pktmp, pp);
451 EVP_PKEY_free(pktmp);
456 #ifndef OPENSSL_NO_DSA
457 DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp,
462 const unsigned char *q;
464 pkey = d2i_PUBKEY(NULL, &q, length);
465 if (!pkey) return NULL;
466 key = EVP_PKEY_get1_DSA(pkey);
468 if (!key) return NULL;
478 int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
483 pktmp = EVP_PKEY_new();
486 ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE);
489 EVP_PKEY_set1_DSA(pktmp, a);
490 ret = i2d_PUBKEY(pktmp, pp);
491 EVP_PKEY_free(pktmp);
496 #ifndef OPENSSL_NO_EC
497 EC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length)
501 const unsigned char *q;
503 pkey = d2i_PUBKEY(NULL, &q, length);
504 if (!pkey) return(NULL);
505 key = EVP_PKEY_get1_EC_KEY(pkey);
507 if (!key) return(NULL);
517 int i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp)
522 if ((pktmp = EVP_PKEY_new()) == NULL)
524 ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE);
527 EVP_PKEY_set1_EC_KEY(pktmp, a);
528 ret = i2d_PUBKEY(pktmp, pp);
529 EVP_PKEY_free(pktmp);