b1a2499d349425345116a2b4bb69f0393850902e
[openssl.git] / crypto / asn1 / x_pubkey.c
1 /* crypto/asn1/x_pubkey.c */
2 /* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
3  * All rights reserved.
4  *
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.
8  * 
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).
15  * 
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.
22  * 
23  * Redistribution and use in source and binary forms, with or without
24  * modification, are permitted provided that the following conditions
25  * are met:
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)"
40  * 
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
51  * SUCH DAMAGE.
52  * 
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.]
57  */
58
59 #include <stdio.h>
60 #include "cryptlib.h"
61 #include "asn1_mac.h"
62
63 /*
64  * ASN1err(ASN1_F_D2I_X509_PUBKEY,ASN1_R_LENGTH_MISMATCH);
65  * ASN1err(ASN1_F_X509_PUBKEY_NEW,ASN1_R_LENGTH_MISMATCH);
66  */
67
68 int i2d_X509_PUBKEY(a,pp)
69 X509_PUBKEY *a;
70 unsigned char **pp;
71         {
72         M_ASN1_I2D_vars(a);
73
74         M_ASN1_I2D_len(a->algor,        i2d_X509_ALGOR);
75         M_ASN1_I2D_len(a->public_key,   i2d_ASN1_BIT_STRING);
76
77         M_ASN1_I2D_seq_total();
78
79         M_ASN1_I2D_put(a->algor,        i2d_X509_ALGOR);
80         M_ASN1_I2D_put(a->public_key,   i2d_ASN1_BIT_STRING);
81
82         M_ASN1_I2D_finish();
83         }
84
85 X509_PUBKEY *d2i_X509_PUBKEY(a,pp,length)
86 X509_PUBKEY **a;
87 unsigned char **pp;
88 long length;
89         {
90         M_ASN1_D2I_vars(a,X509_PUBKEY *,X509_PUBKEY_new);
91
92         M_ASN1_D2I_Init();
93         M_ASN1_D2I_start_sequence();
94         M_ASN1_D2I_get(ret->algor,d2i_X509_ALGOR);
95         M_ASN1_D2I_get(ret->public_key,d2i_ASN1_BIT_STRING);
96         if (ret->pkey != NULL)
97                 {
98                 EVP_PKEY_free(ret->pkey);
99                 ret->pkey=NULL;
100                 }
101         M_ASN1_D2I_Finish(a,X509_PUBKEY_free,ASN1_F_D2I_X509_PUBKEY);
102         }
103
104 X509_PUBKEY *X509_PUBKEY_new()
105         {
106         X509_PUBKEY *ret=NULL;
107
108         M_ASN1_New_Malloc(ret,X509_PUBKEY);
109         M_ASN1_New(ret->algor,X509_ALGOR_new);
110         M_ASN1_New(ret->public_key,ASN1_BIT_STRING_new);
111         ret->pkey=NULL;
112         return(ret);
113         M_ASN1_New_Error(ASN1_F_X509_PUBKEY_NEW);
114         }
115
116 void X509_PUBKEY_free(a)
117 X509_PUBKEY *a;
118         {
119         if (a == NULL) return;
120         X509_ALGOR_free(a->algor);
121         ASN1_BIT_STRING_free(a->public_key);
122         if (a->pkey != NULL) EVP_PKEY_free(a->pkey);
123         Free((char *)a);
124         }
125
126 int X509_PUBKEY_set(x,pkey)
127 X509_PUBKEY **x;
128 EVP_PKEY *pkey;
129         {
130         int ok=0;
131         X509_PUBKEY *pk;
132         X509_ALGOR *a;
133         ASN1_OBJECT *o;
134         unsigned char *s,*p;
135         int i;
136
137         if (x == NULL) return(0);
138
139         if ((pk=X509_PUBKEY_new()) == NULL) goto err;
140         a=pk->algor;
141
142         /* set the algorithm id */
143         if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err;
144         ASN1_OBJECT_free(a->algorithm);
145         a->algorithm=o;
146
147         /* Set the parameter list */
148         if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA))
149                 {
150                 if ((a->parameter == NULL) ||
151                         (a->parameter->type != V_ASN1_NULL))
152                         {
153                         ASN1_TYPE_free(a->parameter);
154                         a->parameter=ASN1_TYPE_new();
155                         a->parameter->type=V_ASN1_NULL;
156                         }
157                 }
158         else
159 #ifndef NO_DSA
160                 if (pkey->type == EVP_PKEY_DSA)
161                 {
162                 unsigned char *pp;
163                 DSA *dsa;
164
165                 dsa=pkey->pkey.dsa;
166                 dsa->write_params=0;
167                 ASN1_TYPE_free(a->parameter);
168                 i=i2d_DSAparams(dsa,NULL);
169                 p=(unsigned char *)Malloc(i);
170                 pp=p;
171                 i2d_DSAparams(dsa,&pp);
172                 a->parameter=ASN1_TYPE_new();
173                 a->parameter->type=V_ASN1_SEQUENCE;
174                 a->parameter->value.sequence=ASN1_STRING_new();
175                 ASN1_STRING_set(a->parameter->value.sequence,p,i);
176                 Free(p);
177                 }
178         else
179 #endif
180                 {
181                 X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
182                 goto err;
183                 }
184
185         i=i2d_PublicKey(pkey,NULL);
186         if ((s=(unsigned char *)Malloc(i+1)) == NULL) goto err;
187         p=s;
188         i2d_PublicKey(pkey,&p);
189         if (!ASN1_BIT_STRING_set(pk->public_key,s,i)) goto err;
190         Free(s);
191
192         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
193         pk->pkey=pkey;
194
195         if (*x != NULL)
196                 X509_PUBKEY_free(*x);
197
198         *x=pk;
199         pk=NULL;
200
201         ok=1;
202 err:
203         if (pk != NULL) X509_PUBKEY_free(pk);
204         return(ok);
205         }
206
207 EVP_PKEY *X509_PUBKEY_get(key)
208 X509_PUBKEY *key;
209         {
210         EVP_PKEY *ret=NULL;
211         long j;
212         int type;
213         unsigned char *p;
214         X509_ALGOR *a;
215
216         if (key->pkey != NULL)
217                 {
218                 return(key->pkey);
219                 }
220         type=OBJ_obj2nid(key->algor->algorithm);
221         p=key->public_key->data;
222         j=key->public_key->length;
223         if ((ret=d2i_PublicKey(type,NULL,&p,(long)j)) == NULL)
224                 {
225                 X509err(X509_F_X509_PUBKEY_GET,X509_R_ERR_ASN1_LIB);
226                 goto err;
227                 }
228         ret->save_parameters=0;
229
230 #ifndef NO_DSA
231         a=key->algor;
232         if (ret->type == EVP_PKEY_DSA)
233                 {
234                 if (a->parameter->type == V_ASN1_SEQUENCE)
235                         {
236                         ret->pkey.dsa->write_params=0;
237                         p=a->parameter->value.sequence->data;
238                         j=a->parameter->value.sequence->length;
239                         if (!d2i_DSAparams(&ret->pkey.dsa,&p,(long)j))
240                                 goto err;
241                         }
242                 ret->save_parameters=1;
243                 }
244 #endif
245         key->pkey=ret;
246         return(ret);
247 err:
248         if (ret != NULL)
249                 EVP_PKEY_free(ret);
250         return(NULL);
251         }
252