x509_req.c revision 296341 
1/* crypto/x509/x509_req.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to.  The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 *    notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 *    notice, this list of conditions and the following disclaimer in the
30 *    documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 *    must display the following acknowledgement:
33 *    "This product includes cryptographic software written by
34 *     Eric Young (eay@cryptsoft.com)"
35 *    The word 'cryptographic' can be left out if the rouines from the library
36 *    being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 *    the apps directory (application code) you must include an acknowledgement:
39 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60#include "cryptlib.h"
61#include <openssl/bn.h>
62#include <openssl/evp.h>
63#include <openssl/asn1.h>
64#include <openssl/asn1t.h>
65#include <openssl/x509.h>
66#include <openssl/objects.h>
67#include <openssl/buffer.h>
68#include <openssl/pem.h>
69
70X509_REQ *X509_to_X509_REQ(X509 *x, EVP_PKEY *pkey, const EVP_MD *md)
71{
72    X509_REQ *ret;
73    X509_REQ_INFO *ri;
74    int i;
75    EVP_PKEY *pktmp;
76
77    ret = X509_REQ_new();
78    if (ret == NULL) {
79        X509err(X509_F_X509_TO_X509_REQ, ERR_R_MALLOC_FAILURE);
80        goto err;
81    }
82
83    ri = ret->req_info;
84
85    ri->version->length = 1;
86    ri->version->data = (unsigned char *)OPENSSL_malloc(1);
87    if (ri->version->data == NULL)
88        goto err;
89    ri->version->data[0] = 0;   /* version == 0 */
90
91    if (!X509_REQ_set_subject_name(ret, X509_get_subject_name(x)))
92        goto err;
93
94    pktmp = X509_get_pubkey(x);
95    if (pktmp == NULL)
96        goto err;
97    i = X509_REQ_set_pubkey(ret, pktmp);
98    EVP_PKEY_free(pktmp);
99    if (!i)
100        goto err;
101
102    if (pkey != NULL) {
103        if (!X509_REQ_sign(ret, pkey, md))
104            goto err;
105    }
106    return (ret);
107 err:
108    X509_REQ_free(ret);
109    return (NULL);
110}
111
112EVP_PKEY *X509_REQ_get_pubkey(X509_REQ *req)
113{
114    if ((req == NULL) || (req->req_info == NULL))
115        return (NULL);
116    return (X509_PUBKEY_get(req->req_info->pubkey));
117}
118
119int X509_REQ_check_private_key(X509_REQ *x, EVP_PKEY *k)
120{
121    EVP_PKEY *xk = NULL;
122    int ok = 0;
123
124    xk = X509_REQ_get_pubkey(x);
125    switch (EVP_PKEY_cmp(xk, k)) {
126    case 1:
127        ok = 1;
128        break;
129    case 0:
130        X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY,
131                X509_R_KEY_VALUES_MISMATCH);
132        break;
133    case -1:
134        X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY, X509_R_KEY_TYPE_MISMATCH);
135        break;
136    case -2:
137#ifndef OPENSSL_NO_EC
138        if (k->type == EVP_PKEY_EC) {
139            X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY, ERR_R_EC_LIB);
140            break;
141        }
142#endif
143#ifndef OPENSSL_NO_DH
144        if (k->type == EVP_PKEY_DH) {
145            /* No idea */
146            X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY,
147                    X509_R_CANT_CHECK_DH_KEY);
148            break;
149        }
150#endif
151        X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY, X509_R_UNKNOWN_KEY_TYPE);
152    }
153
154    EVP_PKEY_free(xk);
155    return (ok);
156}
157
158/*
159 * It seems several organisations had the same idea of including a list of
160 * extensions in a certificate request. There are at least two OIDs that are
161 * used and there may be more: so the list is configurable.
162 */
163
164static int ext_nid_list[] = { NID_ext_req, NID_ms_ext_req, NID_undef };
165
166static int *ext_nids = ext_nid_list;
167
168int X509_REQ_extension_nid(int req_nid)
169{
170    int i, nid;
171    for (i = 0;; i++) {
172        nid = ext_nids[i];
173        if (nid == NID_undef)
174            return 0;
175        else if (req_nid == nid)
176            return 1;
177    }
178}
179
180int *X509_REQ_get_extension_nids(void)
181{
182    return ext_nids;
183}
184
185void X509_REQ_set_extension_nids(int *nids)
186{
187    ext_nids = nids;
188}
189
190STACK_OF(X509_EXTENSION) *X509_REQ_get_extensions(X509_REQ *req)
191{
192    X509_ATTRIBUTE *attr;
193    ASN1_TYPE *ext = NULL;
194    int idx, *pnid;
195    const unsigned char *p;
196
197    if ((req == NULL) || (req->req_info == NULL) || !ext_nids)
198        return (NULL);
199    for (pnid = ext_nids; *pnid != NID_undef; pnid++) {
200        idx = X509_REQ_get_attr_by_NID(req, *pnid, -1);
201        if (idx == -1)
202            continue;
203        attr = X509_REQ_get_attr(req, idx);
204        if (attr->single)
205            ext = attr->value.single;
206        else if (sk_ASN1_TYPE_num(attr->value.set))
207            ext = sk_ASN1_TYPE_value(attr->value.set, 0);
208        break;
209    }
210    if (!ext || (ext->type != V_ASN1_SEQUENCE))
211        return NULL;
212    p = ext->value.sequence->data;
213    return (STACK_OF(X509_EXTENSION) *)
214        ASN1_item_d2i(NULL, &p, ext->value.sequence->length,
215                      ASN1_ITEM_rptr(X509_EXTENSIONS));
216}
217
218/*
219 * Add a STACK_OF extensions to a certificate request: allow alternative OIDs
220 * in case we want to create a non standard one.
221 */
222
223int X509_REQ_add_extensions_nid(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts,
224                                int nid)
225{
226    ASN1_TYPE *at = NULL;
227    X509_ATTRIBUTE *attr = NULL;
228    if (!(at = ASN1_TYPE_new()) || !(at->value.sequence = ASN1_STRING_new()))
229        goto err;
230
231    at->type = V_ASN1_SEQUENCE;
232    /* Generate encoding of extensions */
233    at->value.sequence->length =
234        ASN1_item_i2d((ASN1_VALUE *)exts,
235                      &at->value.sequence->data,
236                      ASN1_ITEM_rptr(X509_EXTENSIONS));
237    if (!(attr = X509_ATTRIBUTE_new()))
238        goto err;
239    if (!(attr->value.set = sk_ASN1_TYPE_new_null()))
240        goto err;
241    if (!sk_ASN1_TYPE_push(attr->value.set, at))
242        goto err;
243    at = NULL;
244    attr->single = 0;
245    attr->object = OBJ_nid2obj(nid);
246    if (!req->req_info->attributes) {
247        if (!(req->req_info->attributes = sk_X509_ATTRIBUTE_new_null()))
248            goto err;
249    }
250    if (!sk_X509_ATTRIBUTE_push(req->req_info->attributes, attr))
251        goto err;
252    return 1;
253 err:
254    X509_ATTRIBUTE_free(attr);
255    ASN1_TYPE_free(at);
256    return 0;
257}
258
259/* This is the normal usage: use the "official" OID */
260int X509_REQ_add_extensions(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts)
261{
262    return X509_REQ_add_extensions_nid(req, exts, NID_ext_req);
263}
264
265/* Request attribute functions */
266
267int X509_REQ_get_attr_count(const X509_REQ *req)
268{
269    return X509at_get_attr_count(req->req_info->attributes);
270}
271
272int X509_REQ_get_attr_by_NID(const X509_REQ *req, int nid, int lastpos)
273{
274    return X509at_get_attr_by_NID(req->req_info->attributes, nid, lastpos);
275}
276
277int X509_REQ_get_attr_by_OBJ(const X509_REQ *req, ASN1_OBJECT *obj,
278                             int lastpos)
279{
280    return X509at_get_attr_by_OBJ(req->req_info->attributes, obj, lastpos);
281}
282
283X509_ATTRIBUTE *X509_REQ_get_attr(const X509_REQ *req, int loc)
284{
285    return X509at_get_attr(req->req_info->attributes, loc);
286}
287
288X509_ATTRIBUTE *X509_REQ_delete_attr(X509_REQ *req, int loc)
289{
290    return X509at_delete_attr(req->req_info->attributes, loc);
291}
292
293int X509_REQ_add1_attr(X509_REQ *req, X509_ATTRIBUTE *attr)
294{
295    if (X509at_add1_attr(&req->req_info->attributes, attr))
296        return 1;
297    return 0;
298}
299
300int X509_REQ_add1_attr_by_OBJ(X509_REQ *req,
301                              const ASN1_OBJECT *obj, int type,
302                              const unsigned char *bytes, int len)
303{
304    if (X509at_add1_attr_by_OBJ(&req->req_info->attributes, obj,
305                                type, bytes, len))
306        return 1;
307    return 0;
308}
309
310int X509_REQ_add1_attr_by_NID(X509_REQ *req,
311                              int nid, int type,
312                              const unsigned char *bytes, int len)
313{
314    if (X509at_add1_attr_by_NID(&req->req_info->attributes, nid,
315                                type, bytes, len))
316        return 1;
317    return 0;
318}
319
320int X509_REQ_add1_attr_by_txt(X509_REQ *req,
321                              const char *attrname, int type,
322                              const unsigned char *bytes, int len)
323{
324    if (X509at_add1_attr_by_txt(&req->req_info->attributes, attrname,
325                                type, bytes, len))
326        return 1;
327    return 0;
328}
329