eea470506319c1637d4ed601c42d3e0b35ca9217
[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 #ifndef OPENSSL_NO_RSA
65 #include <openssl/rsa.h>
66 #endif
67 #ifndef OPENSSL_NO_DSA
68 #include <openssl/dsa.h>
69 #endif
70 #include <openssl/bn.h>
71
72 #include "../asn1/asn1_locl.h"
73
74 /* Extract a private key from a PKCS8 structure */
75
76 EVP_PKEY *EVP_PKCS82PKEY(PKCS8_PRIV_KEY_INFO *p8)
77 {
78         EVP_PKEY *pkey = NULL;
79         ASN1_OBJECT *algoid;
80         const EVP_PKEY_ASN1_METHOD *meth;
81         char obj_tmp[80];
82
83         if (!PKCS8_pkey_get0(&algoid, NULL, NULL, NULL, p8))
84                 return NULL;
85
86         if (!(pkey = EVP_PKEY_new())) {
87                 EVPerr(EVP_F_EVP_PKCS82PKEY,ERR_R_MALLOC_FAILURE);
88                 return NULL;
89         }
90
91         meth = EVP_PKEY_ASN1_find(OBJ_obj2nid(algoid));
92
93         if (meth)
94                 {
95                 if (meth->priv_decode)
96                         {
97                         if (!meth->priv_decode(pkey, p8))
98                                 {
99                                 EVPerr(EVP_F_EVP_PKCS82PKEY,
100                                         EVP_R_PRIVATE_KEY_DECODE_ERROR);
101                                 goto error;
102                                 }
103                         }
104                 else
105                         {
106                         EVPerr(EVP_F_EVP_PKCS82PKEY,
107                                         EVP_R_METHOD_NOT_SUPPORTED);
108                         goto error;
109                         }
110                 }
111         else
112                 {
113                 EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
114                 i2t_ASN1_OBJECT(obj_tmp, 80, algoid);
115                 ERR_add_error_data(2, "TYPE=", obj_tmp);
116                 goto error;
117                 }
118         return pkey;
119
120         error:
121         EVP_PKEY_free (pkey);
122         return NULL;
123 }
124
125 PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8(EVP_PKEY *pkey)
126 {
127         return EVP_PKEY2PKCS8_broken(pkey, PKCS8_OK);
128 }
129
130 /* Turn a private key into a PKCS8 structure */
131
132 PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8_broken(EVP_PKEY *pkey, int broken)
133 {
134         PKCS8_PRIV_KEY_INFO *p8;
135         const EVP_PKEY_ASN1_METHOD *meth;
136
137         if (!(p8 = PKCS8_PRIV_KEY_INFO_new())) {        
138                 EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,ERR_R_MALLOC_FAILURE);
139                 return NULL;
140         }
141         p8->broken = broken;
142
143         meth = EVP_PKEY_ASN1_find(pkey->type);
144
145         if (meth)
146                 {
147                 if (meth->priv_encode)
148                         {
149                         if (!meth->priv_encode(p8, pkey))
150                                 {
151                                 EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
152                                         EVP_R_PRIVATE_KEY_ENCODE_ERROR);
153                                 goto error;
154                                 }
155                         }
156                 else
157                         {
158                         EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
159                                         EVP_R_METHOD_NOT_SUPPORTED);
160                         goto error;
161                         }
162                 }
163         else
164                 {
165                 EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
166                                 EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
167                 goto error;
168                 }
169         RAND_add(p8->pkey->value.octet_string->data,
170                  p8->pkey->value.octet_string->length, 0.0);
171         return p8;
172         error:
173         PKCS8_PRIV_KEY_INFO_free(p8);
174         return NULL;
175 }
176
177 PKCS8_PRIV_KEY_INFO *PKCS8_set_broken(PKCS8_PRIV_KEY_INFO *p8, int broken)
178 {
179         switch (broken) {
180
181                 case PKCS8_OK:
182                 p8->broken = PKCS8_OK;
183                 return p8;
184                 break;
185
186                 case PKCS8_NO_OCTET:
187                 p8->broken = PKCS8_NO_OCTET;
188                 p8->pkey->type = V_ASN1_SEQUENCE;
189                 return p8;
190                 break;
191
192                 default:
193                 EVPerr(EVP_F_PKCS8_SET_BROKEN,EVP_R_PKCS8_UNKNOWN_BROKEN_TYPE);
194                 return NULL;
195         }
196 }
197
198 /* EVP_PKEY attribute functions */
199
200 int EVP_PKEY_get_attr_count(const EVP_PKEY *key)
201 {
202         return X509at_get_attr_count(key->attributes);
203 }
204
205 int EVP_PKEY_get_attr_by_NID(const EVP_PKEY *key, int nid,
206                           int lastpos)
207 {
208         return X509at_get_attr_by_NID(key->attributes, nid, lastpos);
209 }
210
211 int EVP_PKEY_get_attr_by_OBJ(const EVP_PKEY *key, ASN1_OBJECT *obj,
212                           int lastpos)
213 {
214         return X509at_get_attr_by_OBJ(key->attributes, obj, lastpos);
215 }
216
217 X509_ATTRIBUTE *EVP_PKEY_get_attr(const EVP_PKEY *key, int loc)
218 {
219         return X509at_get_attr(key->attributes, loc);
220 }
221
222 X509_ATTRIBUTE *EVP_PKEY_delete_attr(EVP_PKEY *key, int loc)
223 {
224         return X509at_delete_attr(key->attributes, loc);
225 }
226
227 int EVP_PKEY_add1_attr(EVP_PKEY *key, X509_ATTRIBUTE *attr)
228 {
229         if(X509at_add1_attr(&key->attributes, attr)) return 1;
230         return 0;
231 }
232
233 int EVP_PKEY_add1_attr_by_OBJ(EVP_PKEY *key,
234                         const ASN1_OBJECT *obj, int type,
235                         const unsigned char *bytes, int len)
236 {
237         if(X509at_add1_attr_by_OBJ(&key->attributes, obj,
238                                 type, bytes, len)) return 1;
239         return 0;
240 }
241
242 int EVP_PKEY_add1_attr_by_NID(EVP_PKEY *key,
243                         int nid, int type,
244                         const unsigned char *bytes, int len)
245 {
246         if(X509at_add1_attr_by_NID(&key->attributes, nid,
247                                 type, bytes, len)) return 1;
248         return 0;
249 }
250
251 int EVP_PKEY_add1_attr_by_txt(EVP_PKEY *key,
252                         const char *attrname, int type,
253                         const unsigned char *bytes, int len)
254 {
255         if(X509at_add1_attr_by_txt(&key->attributes, attrname,
256                                 type, bytes, len)) return 1;
257         return 0;
258 }