e81c4fedb199954b540eb20b17be02699625b186
[openssl.git] / crypto / evp / evp_pkey.c
1 /* evp_pkey.c */
2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
3  * project 1999.
4  */
5 /* ====================================================================
6  * Copyright (c) 1999-2005 The OpenSSL Project.  All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer. 
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in
17  *    the documentation and/or other materials provided with the
18  *    distribution.
19  *
20  * 3. All advertising materials mentioning features or use of this
21  *    software must display the following acknowledgment:
22  *    "This product includes software developed by the OpenSSL Project
23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24  *
25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26  *    endorse or promote products derived from this software without
27  *    prior written permission. For written permission, please contact
28  *    licensing@OpenSSL.org.
29  *
30  * 5. Products derived from this software may not be called "OpenSSL"
31  *    nor may "OpenSSL" appear in their names without prior written
32  *    permission of the OpenSSL Project.
33  *
34  * 6. Redistributions of any form whatsoever must retain the following
35  *    acknowledgment:
36  *    "This product includes software developed by the OpenSSL Project
37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38  *
39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50  * OF THE POSSIBILITY OF SUCH DAMAGE.
51  * ====================================================================
52  *
53  * This product includes cryptographic software written by Eric Young
54  * (eay@cryptsoft.com).  This product includes software written by Tim
55  * Hudson (tjh@cryptsoft.com).
56  *
57  */
58
59 #include <stdio.h>
60 #include <stdlib.h>
61 #include "cryptlib.h"
62 #include <openssl/x509.h>
63 #include <openssl/rand.h>
64 #include "asn1_locl.h"
65
66 /* Extract a private key from a PKCS8 structure */
67
68 EVP_PKEY *EVP_PKCS82PKEY(PKCS8_PRIV_KEY_INFO *p8)
69 {
70         EVP_PKEY *pkey = NULL;
71         ASN1_OBJECT *algoid;
72         const EVP_PKEY_ASN1_METHOD *meth;
73         char obj_tmp[80];
74
75         if (!PKCS8_pkey_get0(&algoid, NULL, NULL, NULL, p8))
76                 return NULL;
77
78         if (!(pkey = EVP_PKEY_new())) {
79                 EVPerr(EVP_F_EVP_PKCS82PKEY,ERR_R_MALLOC_FAILURE);
80                 return NULL;
81         }
82
83         meth = EVP_PKEY_asn1_find(OBJ_obj2nid(algoid));
84
85         if (meth)
86                 {
87                 if (meth->priv_decode)
88                         {
89                         if (!meth->priv_decode(pkey, p8))
90                                 {
91                                 EVPerr(EVP_F_EVP_PKCS82PKEY,
92                                         EVP_R_PRIVATE_KEY_DECODE_ERROR);
93                                 goto error;
94                                 }
95                         }
96                 else
97                         {
98                         EVPerr(EVP_F_EVP_PKCS82PKEY,
99                                         EVP_R_METHOD_NOT_SUPPORTED);
100                         goto error;
101                         }
102                 }
103         else
104                 {
105                 EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
106                 i2t_ASN1_OBJECT(obj_tmp, 80, algoid);
107                 ERR_add_error_data(2, "TYPE=", obj_tmp);
108                 goto error;
109                 }
110         return pkey;
111
112         error:
113         EVP_PKEY_free (pkey);
114         return NULL;
115 }
116
117 PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8(EVP_PKEY *pkey)
118 {
119         return EVP_PKEY2PKCS8_broken(pkey, PKCS8_OK);
120 }
121
122 /* Turn a private key into a PKCS8 structure */
123
124 PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8_broken(EVP_PKEY *pkey, int broken)
125 {
126         PKCS8_PRIV_KEY_INFO *p8;
127         const EVP_PKEY_ASN1_METHOD *meth;
128
129         if (!(p8 = PKCS8_PRIV_KEY_INFO_new())) {        
130                 EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,ERR_R_MALLOC_FAILURE);
131                 return NULL;
132         }
133         p8->broken = broken;
134
135         meth = EVP_PKEY_asn1_find(pkey->type);
136
137         if (meth)
138                 {
139                 if (meth->priv_encode)
140                         {
141                         if (!meth->priv_encode(p8, pkey))
142                                 {
143                                 EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
144                                         EVP_R_PRIVATE_KEY_ENCODE_ERROR);
145                                 goto error;
146                                 }
147                         }
148                 else
149                         {
150                         EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
151                                         EVP_R_METHOD_NOT_SUPPORTED);
152                         goto error;
153                         }
154                 }
155         else
156                 {
157                 EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
158                                 EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
159                 goto error;
160                 }
161         RAND_add(p8->pkey->value.octet_string->data,
162                  p8->pkey->value.octet_string->length, 0.0);
163         return p8;
164         error:
165         PKCS8_PRIV_KEY_INFO_free(p8);
166         return NULL;
167 }
168
169 PKCS8_PRIV_KEY_INFO *PKCS8_set_broken(PKCS8_PRIV_KEY_INFO *p8, int broken)
170 {
171         switch (broken) {
172
173                 case PKCS8_OK:
174                 p8->broken = PKCS8_OK;
175                 return p8;
176                 break;
177
178                 case PKCS8_NO_OCTET:
179                 p8->broken = PKCS8_NO_OCTET;
180                 p8->pkey->type = V_ASN1_SEQUENCE;
181                 return p8;
182                 break;
183
184                 default:
185                 EVPerr(EVP_F_PKCS8_SET_BROKEN,EVP_R_PKCS8_UNKNOWN_BROKEN_TYPE);
186                 return NULL;
187         }
188 }
189
190 /* EVP_PKEY attribute functions */
191
192 int EVP_PKEY_get_attr_count(const EVP_PKEY *key)
193 {
194         return X509at_get_attr_count(key->attributes);
195 }
196
197 int EVP_PKEY_get_attr_by_NID(const EVP_PKEY *key, int nid,
198                           int lastpos)
199 {
200         return X509at_get_attr_by_NID(key->attributes, nid, lastpos);
201 }
202
203 int EVP_PKEY_get_attr_by_OBJ(const EVP_PKEY *key, ASN1_OBJECT *obj,
204                           int lastpos)
205 {
206         return X509at_get_attr_by_OBJ(key->attributes, obj, lastpos);
207 }
208
209 X509_ATTRIBUTE *EVP_PKEY_get_attr(const EVP_PKEY *key, int loc)
210 {
211         return X509at_get_attr(key->attributes, loc);
212 }
213
214 X509_ATTRIBUTE *EVP_PKEY_delete_attr(EVP_PKEY *key, int loc)
215 {
216         return X509at_delete_attr(key->attributes, loc);
217 }
218
219 int EVP_PKEY_add1_attr(EVP_PKEY *key, X509_ATTRIBUTE *attr)
220 {
221         if(X509at_add1_attr(&key->attributes, attr)) return 1;
222         return 0;
223 }
224
225 int EVP_PKEY_add1_attr_by_OBJ(EVP_PKEY *key,
226                         const ASN1_OBJECT *obj, int type,
227                         const unsigned char *bytes, int len)
228 {
229         if(X509at_add1_attr_by_OBJ(&key->attributes, obj,
230                                 type, bytes, len)) return 1;
231         return 0;
232 }
233
234 int EVP_PKEY_add1_attr_by_NID(EVP_PKEY *key,
235                         int nid, int type,
236                         const unsigned char *bytes, int len)
237 {
238         if(X509at_add1_attr_by_NID(&key->attributes, nid,
239                                 type, bytes, len)) return 1;
240         return 0;
241 }
242
243 int EVP_PKEY_add1_attr_by_txt(EVP_PKEY *key,
244                         const char *attrname, int type,
245                         const unsigned char *bytes, int len)
246 {
247         if(X509at_add1_attr_by_txt(&key->attributes, attrname,
248                                 type, bytes, len)) return 1;
249         return 0;
250 }