200817bf5b33eed1b58569c53716d1f55766ce81
[openssl.git] / crypto / asn1 / x_pubkey.c
1 /* crypto/asn1/x_pubkey.c */
2 /* Copyright (C) 1995-1998 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,ERR_R_ASN1_LENGTH_MISMATCH);
65  * ASN1err(ASN1_F_X509_PUBKEY_NEW,ERR_R_ASN1_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         ASN1_CTX c;
108
109         M_ASN1_New_Malloc(ret,X509_PUBKEY);
110         M_ASN1_New(ret->algor,X509_ALGOR_new);
111         M_ASN1_New(ret->public_key,ASN1_BIT_STRING_new);
112         ret->pkey=NULL;
113         return(ret);
114         M_ASN1_New_Error(ASN1_F_X509_PUBKEY_NEW);
115         }
116
117 void X509_PUBKEY_free(a)
118 X509_PUBKEY *a;
119         {
120         if (a == NULL) return;
121         X509_ALGOR_free(a->algor);
122         ASN1_BIT_STRING_free(a->public_key);
123         if (a->pkey != NULL) EVP_PKEY_free(a->pkey);
124         Free((char *)a);
125         }
126
127 int X509_PUBKEY_set(x,pkey)
128 X509_PUBKEY **x;
129 EVP_PKEY *pkey;
130         {
131         int ok=0;
132         X509_PUBKEY *pk;
133         X509_ALGOR *a;
134         ASN1_OBJECT *o;
135         unsigned char *s,*p;
136         int i;
137
138         if (x == NULL) return(0);
139
140         if ((pk=X509_PUBKEY_new()) == NULL) goto err;
141         a=pk->algor;
142
143         /* set the algorithm id */
144         if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err;
145         ASN1_OBJECT_free(a->algorithm);
146         a->algorithm=o;
147
148         /* Set the parameter list */
149         if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA))
150                 {
151                 if ((a->parameter == NULL) ||
152                         (a->parameter->type != V_ASN1_NULL))
153                         {
154                         ASN1_TYPE_free(a->parameter);
155                         a->parameter=ASN1_TYPE_new();
156                         a->parameter->type=V_ASN1_NULL;
157                         }
158                 }
159         else
160 #ifndef NO_DSA
161                 if (pkey->type == EVP_PKEY_DSA)
162                 {
163                 unsigned char *pp;
164                 DSA *dsa;
165
166                 dsa=pkey->pkey.dsa;
167                 dsa->write_params=0;
168                 ASN1_TYPE_free(a->parameter);
169                 i=i2d_DSAparams(dsa,NULL);
170                 p=(unsigned char *)Malloc(i);
171                 pp=p;
172                 i2d_DSAparams(dsa,&pp);
173                 a->parameter=ASN1_TYPE_new();
174                 a->parameter->type=V_ASN1_SEQUENCE;
175                 a->parameter->value.sequence=ASN1_STRING_new();
176                 ASN1_STRING_set(a->parameter->value.sequence,p,i);
177                 Free(p);
178                 }
179         else
180 #endif
181                 {
182                 X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
183                 goto err;
184                 }
185
186         i=i2d_PublicKey(pkey,NULL);
187         if ((s=(unsigned char *)Malloc(i+1)) == NULL) goto err;
188         p=s;
189         i2d_PublicKey(pkey,&p);
190         if (!ASN1_BIT_STRING_set(pk->public_key,s,i)) goto err;
191         /* Set number of unused bits to zero */
192         pk->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
193         pk->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT;
194
195         Free(s);
196
197         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
198         pk->pkey=pkey;
199
200         if (*x != NULL)
201                 X509_PUBKEY_free(*x);
202
203         *x=pk;
204         pk=NULL;
205
206         ok=1;
207 err:
208         if (pk != NULL) X509_PUBKEY_free(pk);
209         return(ok);
210         }
211
212 EVP_PKEY *X509_PUBKEY_get(key)
213 X509_PUBKEY *key;
214         {
215         EVP_PKEY *ret=NULL;
216         long j;
217         int type;
218         unsigned char *p;
219 #ifndef NO_DSA
220         X509_ALGOR *a;
221 #endif
222
223         if (key == NULL) goto err;
224
225         if (key->pkey != NULL) return(key->pkey);
226
227         if (key->public_key == NULL) goto err;
228
229         type=OBJ_obj2nid(key->algor->algorithm);
230         p=key->public_key->data;
231         j=key->public_key->length;
232         if ((ret=d2i_PublicKey(type,NULL,&p,(long)j)) == NULL)
233                 {
234                 X509err(X509_F_X509_PUBKEY_GET,X509_R_ERR_ASN1_LIB);
235                 goto err;
236                 }
237         ret->save_parameters=0;
238
239 #ifndef NO_DSA
240         a=key->algor;
241         if (ret->type == EVP_PKEY_DSA)
242                 {
243                 if (a->parameter->type == V_ASN1_SEQUENCE)
244                         {
245                         ret->pkey.dsa->write_params=0;
246                         p=a->parameter->value.sequence->data;
247                         j=a->parameter->value.sequence->length;
248                         if (!d2i_DSAparams(&ret->pkey.dsa,&p,(long)j))
249                                 goto err;
250                         }
251                 ret->save_parameters=1;
252                 }
253 #endif
254         key->pkey=ret;
255         return(ret);
256 err:
257         if (ret != NULL)
258                 EVP_PKEY_free(ret);
259         return(NULL);
260         }
261