evp_pkey.c revision 296341 
1/* evp_pkey.c */
2/*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 * 1999.
5 */
6/* ====================================================================
7 * Copyright (c) 1999-2005 The OpenSSL Project.  All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in
18 *    the documentation and/or other materials provided with the
19 *    distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 *    software must display the following acknowledgment:
23 *    "This product includes software developed by the OpenSSL Project
24 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 *    endorse or promote products derived from this software without
28 *    prior written permission. For written permission, please contact
29 *    licensing@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 *    nor may "OpenSSL" appear in their names without prior written
33 *    permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 *    acknowledgment:
37 *    "This product includes software developed by the OpenSSL Project
38 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com).  This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60#include <stdio.h>
61#include <stdlib.h>
62#include "cryptlib.h"
63#include <openssl/x509.h>
64#include <openssl/rand.h>
65#include "asn1_locl.h"
66
67/* Extract a private key from a PKCS8 structure */
68
69EVP_PKEY *EVP_PKCS82PKEY(PKCS8_PRIV_KEY_INFO *p8)
70{
71    EVP_PKEY *pkey = NULL;
72    ASN1_OBJECT *algoid;
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    if (!EVP_PKEY_set_type(pkey, OBJ_obj2nid(algoid))) {
84        EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
85        i2t_ASN1_OBJECT(obj_tmp, 80, algoid);
86        ERR_add_error_data(2, "TYPE=", obj_tmp);
87        goto error;
88    }
89
90    if (pkey->ameth->priv_decode) {
91        if (!pkey->ameth->priv_decode(pkey, p8)) {
92            EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_PRIVATE_KEY_DECODE_ERROR);
93            goto error;
94        }
95    } else {
96        EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_METHOD_NOT_SUPPORTED);
97        goto error;
98    }
99
100    return pkey;
101
102 error:
103    EVP_PKEY_free(pkey);
104    return NULL;
105}
106
107PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8(EVP_PKEY *pkey)
108{
109    return EVP_PKEY2PKCS8_broken(pkey, PKCS8_OK);
110}
111
112/* Turn a private key into a PKCS8 structure */
113
114PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8_broken(EVP_PKEY *pkey, int broken)
115{
116    PKCS8_PRIV_KEY_INFO *p8;
117
118    if (!(p8 = PKCS8_PRIV_KEY_INFO_new())) {
119        EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN, ERR_R_MALLOC_FAILURE);
120        return NULL;
121    }
122    p8->broken = broken;
123
124    if (pkey->ameth) {
125        if (pkey->ameth->priv_encode) {
126            if (!pkey->ameth->priv_encode(p8, pkey)) {
127                EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
128                       EVP_R_PRIVATE_KEY_ENCODE_ERROR);
129                goto error;
130            }
131        } else {
132            EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN, EVP_R_METHOD_NOT_SUPPORTED);
133            goto error;
134        }
135    } else {
136        EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
137               EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
138        goto error;
139    }
140    RAND_add(p8->pkey->value.octet_string->data,
141             p8->pkey->value.octet_string->length, 0.0);
142    return p8;
143 error:
144    PKCS8_PRIV_KEY_INFO_free(p8);
145    return NULL;
146}
147
148PKCS8_PRIV_KEY_INFO *PKCS8_set_broken(PKCS8_PRIV_KEY_INFO *p8, int broken)
149{
150    switch (broken) {
151
152    case PKCS8_OK:
153        p8->broken = PKCS8_OK;
154        return p8;
155        break;
156
157    case PKCS8_NO_OCTET:
158        p8->broken = PKCS8_NO_OCTET;
159        p8->pkey->type = V_ASN1_SEQUENCE;
160        return p8;
161        break;
162
163    default:
164        EVPerr(EVP_F_PKCS8_SET_BROKEN, EVP_R_PKCS8_UNKNOWN_BROKEN_TYPE);
165        return NULL;
166    }
167}
168
169/* EVP_PKEY attribute functions */
170
171int EVP_PKEY_get_attr_count(const EVP_PKEY *key)
172{
173    return X509at_get_attr_count(key->attributes);
174}
175
176int EVP_PKEY_get_attr_by_NID(const EVP_PKEY *key, int nid, int lastpos)
177{
178    return X509at_get_attr_by_NID(key->attributes, nid, lastpos);
179}
180
181int EVP_PKEY_get_attr_by_OBJ(const EVP_PKEY *key, ASN1_OBJECT *obj,
182                             int lastpos)
183{
184    return X509at_get_attr_by_OBJ(key->attributes, obj, lastpos);
185}
186
187X509_ATTRIBUTE *EVP_PKEY_get_attr(const EVP_PKEY *key, int loc)
188{
189    return X509at_get_attr(key->attributes, loc);
190}
191
192X509_ATTRIBUTE *EVP_PKEY_delete_attr(EVP_PKEY *key, int loc)
193{
194    return X509at_delete_attr(key->attributes, loc);
195}
196
197int EVP_PKEY_add1_attr(EVP_PKEY *key, X509_ATTRIBUTE *attr)
198{
199    if (X509at_add1_attr(&key->attributes, attr))
200        return 1;
201    return 0;
202}
203
204int EVP_PKEY_add1_attr_by_OBJ(EVP_PKEY *key,
205                              const ASN1_OBJECT *obj, int type,
206                              const unsigned char *bytes, int len)
207{
208    if (X509at_add1_attr_by_OBJ(&key->attributes, obj, type, bytes, len))
209        return 1;
210    return 0;
211}
212
213int EVP_PKEY_add1_attr_by_NID(EVP_PKEY *key,
214                              int nid, int type,
215                              const unsigned char *bytes, int len)
216{
217    if (X509at_add1_attr_by_NID(&key->attributes, nid, type, bytes, len))
218        return 1;
219    return 0;
220}
221
222int EVP_PKEY_add1_attr_by_txt(EVP_PKEY *key,
223                              const char *attrname, int type,
224                              const unsigned char *bytes, int len)
225{
226    if (X509at_add1_attr_by_txt(&key->attributes, attrname, type, bytes, len))
227        return 1;
228    return 0;
229}
230