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 
EVP_PKCS82PKEY(PKCS8_PRIV_KEY_INFO * p8)69 EVP_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 
EVP_PKEY2PKCS8(EVP_PKEY * pkey)107 PKCS8_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 
EVP_PKEY2PKCS8_broken(EVP_PKEY * pkey,int broken)114 PKCS8_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 
PKCS8_set_broken(PKCS8_PRIV_KEY_INFO * p8,int broken)148 PKCS8_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 
EVP_PKEY_get_attr_count(const EVP_PKEY * key)171 int EVP_PKEY_get_attr_count(const EVP_PKEY *key)
172 {
173     return X509at_get_attr_count(key->attributes);
174 }
175 
EVP_PKEY_get_attr_by_NID(const EVP_PKEY * key,int nid,int lastpos)176 int 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 
EVP_PKEY_get_attr_by_OBJ(const EVP_PKEY * key,ASN1_OBJECT * obj,int lastpos)181 int 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 
EVP_PKEY_get_attr(const EVP_PKEY * key,int loc)187 X509_ATTRIBUTE *EVP_PKEY_get_attr(const EVP_PKEY *key, int loc)
188 {
189     return X509at_get_attr(key->attributes, loc);
190 }
191 
EVP_PKEY_delete_attr(EVP_PKEY * key,int loc)192 X509_ATTRIBUTE *EVP_PKEY_delete_attr(EVP_PKEY *key, int loc)
193 {
194     return X509at_delete_attr(key->attributes, loc);
195 }
196 
EVP_PKEY_add1_attr(EVP_PKEY * key,X509_ATTRIBUTE * attr)197 int 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 
EVP_PKEY_add1_attr_by_OBJ(EVP_PKEY * key,const ASN1_OBJECT * obj,int type,const unsigned char * bytes,int len)204 int 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 
EVP_PKEY_add1_attr_by_NID(EVP_PKEY * key,int nid,int type,const unsigned char * bytes,int len)213 int 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 
EVP_PKEY_add1_attr_by_txt(EVP_PKEY * key,const char * attrname,int type,const unsigned char * bytes,int len)222 int 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