7d54d0c235f2c030d7347a4b561d845557321fde
[openssl.git] / crypto / x509v3 / v3_akey.c
1 /* v3_akey.c */
2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
3  * project 1999.
4  */
5 /* ====================================================================
6  * Copyright (c) 1999 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 "cryptlib.h"
61 #include "conf.h"
62 #include "asn1.h"
63 #include "asn1_mac.h"
64 #include "x509v3.h"
65
66 #ifndef NOPROTO
67 static STACK *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, AUTHORITY_KEYID *akeyid, STACK *extlist);
68 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, STACK *values);
69
70 #else
71
72 static STACK *i2v_AUTHORITY_KEYID();
73 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID();
74
75 #endif
76
77 X509V3_EXT_METHOD v3_akey_id = {
78 NID_authority_key_identifier, X509V3_EXT_MULTILINE,
79 (X509V3_EXT_NEW)AUTHORITY_KEYID_new,
80 AUTHORITY_KEYID_free,
81 (X509V3_EXT_D2I)d2i_AUTHORITY_KEYID,
82 i2d_AUTHORITY_KEYID,
83 NULL, NULL,
84 (X509V3_EXT_I2V)i2v_AUTHORITY_KEYID,
85 (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID,
86 NULL,NULL,
87 NULL
88 };
89
90
91 /*
92  * ASN1err(ASN1_F_AUTHORITY_KEYID_NEW,ERR_R_MALLOC_FAILURE);
93  * ASN1err(ASN1_F_D2I_AUTHORITY_KEYID,ERR_R_MALLOC_FAILURE);
94  */
95
96 int i2d_AUTHORITY_KEYID(AUTHORITY_KEYID *a, unsigned char **pp)
97 {
98         M_ASN1_I2D_vars(a);
99
100         M_ASN1_I2D_len_IMP_opt (a->keyid, i2d_ASN1_OCTET_STRING);
101         M_ASN1_I2D_len_IMP_opt (a->issuer, i2d_GENERAL_NAMES);
102         M_ASN1_I2D_len_IMP_opt (a->serial, i2d_ASN1_INTEGER);
103
104         M_ASN1_I2D_seq_total();
105
106         M_ASN1_I2D_put_IMP_opt (a->keyid, i2d_ASN1_OCTET_STRING, 0);
107         M_ASN1_I2D_put_IMP_opt (a->issuer, i2d_GENERAL_NAMES, 1);
108         M_ASN1_I2D_put_IMP_opt (a->serial, i2d_ASN1_INTEGER, 2);
109
110         M_ASN1_I2D_finish();
111 }
112
113 AUTHORITY_KEYID *AUTHORITY_KEYID_new(void)
114 {
115         AUTHORITY_KEYID *ret=NULL;
116         ASN1_CTX c;
117         M_ASN1_New_Malloc(ret, AUTHORITY_KEYID);
118         ret->keyid = NULL;
119         ret->issuer = NULL;
120         ret->serial = NULL;
121         return (ret);
122         M_ASN1_New_Error(ASN1_F_AUTHORITY_KEYID_NEW);
123 }
124
125 AUTHORITY_KEYID *d2i_AUTHORITY_KEYID(AUTHORITY_KEYID **a, unsigned char **pp,
126              long length)
127 {
128         M_ASN1_D2I_vars(a,AUTHORITY_KEYID *,AUTHORITY_KEYID_new);
129         M_ASN1_D2I_Init();
130         M_ASN1_D2I_start_sequence();
131         M_ASN1_D2I_get_IMP_opt (ret->keyid, d2i_ASN1_OCTET_STRING, 0,
132                                                         V_ASN1_OCTET_STRING);
133         M_ASN1_D2I_get_IMP_opt (ret->issuer, d2i_GENERAL_NAMES, 1,
134                                                         V_ASN1_SEQUENCE);
135         M_ASN1_D2I_get_IMP_opt (ret->serial, d2i_ASN1_INTEGER, 2,
136                                                         V_ASN1_INTEGER);
137         M_ASN1_D2I_Finish(a, AUTHORITY_KEYID_free, ASN1_F_D2I_AUTHORITY_KEYID);
138 }
139
140 void AUTHORITY_KEYID_free(AUTHORITY_KEYID *a)
141 {
142         if (a == NULL) return;
143         ASN1_OCTET_STRING_free(a->keyid);
144         sk_pop_free(a->issuer, GENERAL_NAME_free);
145         ASN1_INTEGER_free (a->serial);
146         Free ((char *)a);
147 }
148
149 static STACK *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
150              AUTHORITY_KEYID *akeyid, STACK *extlist)
151 {
152         char *tmp;
153         if(akeyid->keyid) {
154                 tmp = hex_to_string(akeyid->keyid->data, akeyid->keyid->length);
155                 X509V3_add_value("keyid", tmp, &extlist);
156                 Free(tmp);
157         }
158         if(akeyid->issuer) 
159                 extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist);
160         if(akeyid->serial) {
161                 tmp = hex_to_string(akeyid->serial->data,
162                                                  akeyid->serial->length);
163                 X509V3_add_value("serial", tmp, &extlist);
164                 Free(tmp);
165         }
166         return extlist;
167 }
168
169 /* Currently two options:
170  * keyid: use the issuers subject keyid, the value 'always' means its is
171  * an error if the issuer certificate doesn't have a key id.
172  * issuer: use the issuers cert issuer and serial number. The default is
173  * to only use this if keyid is not present. With the option 'always'
174  * this is always included.
175  */
176
177 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
178              X509V3_CTX *ctx, STACK *values)
179 {
180 char keyid=0, issuer=0;
181 int i;
182 CONF_VALUE *cnf;
183 ASN1_OCTET_STRING *ikeyid = NULL;
184 X509_NAME *isname = NULL;
185 STACK * gens = NULL;
186 GENERAL_NAME *gen = NULL;
187 ASN1_INTEGER *serial = NULL;
188 X509_EXTENSION *ext;
189 X509 *cert;
190 AUTHORITY_KEYID *akeyid;
191 for(i = 0; i < sk_num(values); i++) {
192         cnf = (CONF_VALUE *)sk_value(values, i);
193         if(!strcmp(cnf->name, "keyid")) {
194                 keyid = 1;
195                 if(cnf->value && !strcmp(cnf->value, "always")) keyid = 2;
196         } else if(!strcmp(cnf->name, "issuer")) {
197                 issuer = 1;
198                 if(cnf->value && !strcmp(cnf->value, "always")) issuer = 2;
199         } else {
200                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNKNOWN_OPTION);
201                 ERR_add_error_data(2, "name=", cnf->name);
202                 return NULL;
203         }
204 }
205
206
207
208 if(!ctx || !ctx->issuer_cert) {
209         if(ctx && (ctx->flags==CTX_TEST)) return AUTHORITY_KEYID_new();
210         X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_NO_ISSUER_CERTIFICATE);
211         return NULL;
212 }
213
214 cert = ctx->issuer_cert;
215
216 if(keyid) {
217         i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1);
218         if((i >= 0)  && (ext = X509_get_ext(cert, i)))
219                         ikeyid = (ASN1_OCTET_STRING *) X509V3_EXT_d2i(ext);
220         if(keyid==2 && !ikeyid) {
221                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_KEYID);
222                 return NULL;
223         }
224 }
225
226 if((issuer && !ikeyid) || (issuer == 2)) {
227         isname = X509_NAME_dup(X509_get_issuer_name(cert));
228         serial = ASN1_INTEGER_dup(X509_get_serialNumber(cert));
229         if(!isname || !serial) {
230                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS);
231                 goto err;
232         }
233 }
234
235 if(!(akeyid = AUTHORITY_KEYID_new())) goto err;
236
237 if(isname) {
238         if(!(gens = sk_new(NULL)) || !(gen = GENERAL_NAME_new())
239                 || !sk_push(gens, (char *)gen)) {
240                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,ERR_R_MALLOC_FAILURE);
241                 goto err;
242         }
243         gen->type = GEN_DIRNAME;
244         gen->d.dirn = isname;
245 }
246
247 akeyid->issuer = gens;
248 akeyid->serial = serial;
249 akeyid->keyid = ikeyid;
250
251 return akeyid;
252
253 err:
254 X509_NAME_free(isname);
255 ASN1_INTEGER_free(serial);
256 ASN1_OCTET_STRING_free(ikeyid);
257 return NULL;
258
259 }
260