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#include <openssl/asn1.h>
59#include <openssl/asn1t.h>
60#include <openssl/bn.h>
61#include <openssl/buf.h>
62#include <openssl/err.h>
63#include <openssl/evp.h>
64#include <openssl/mem.h>
65#include <openssl/obj.h>
66#include <openssl/pem.h>
67#include <openssl/x509.h>
68
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		{
80		OPENSSL_PUT_ERROR(X509, X509_to_X509_REQ, ERR_R_MALLOC_FAILURE);
81		goto err;
82		}
83
84	ri=ret->req_info;
85
86	ri->version->length=1;
87	ri->version->data=(unsigned char *)OPENSSL_malloc(1);
88	if (ri->version->data == NULL) 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	i=X509_REQ_set_pubkey(ret,pktmp);
96	EVP_PKEY_free(pktmp);
97	if (!i) goto err;
98
99	if (pkey != NULL)
100		{
101		if (!X509_REQ_sign(ret,pkey,md))
102			goto err;
103		}
104	return(ret);
105err:
106	X509_REQ_free(ret);
107	return(NULL);
108	}
109
110EVP_PKEY *X509_REQ_get_pubkey(X509_REQ *req)
111	{
112	if ((req == NULL) || (req->req_info == NULL))
113		return(NULL);
114	return(X509_PUBKEY_get(req->req_info->pubkey));
115	}
116
117int X509_REQ_check_private_key(X509_REQ *x, EVP_PKEY *k)
118	{
119	EVP_PKEY *xk=NULL;
120	int ok=0;
121
122	xk=X509_REQ_get_pubkey(x);
123	switch (EVP_PKEY_cmp(xk, k))
124		{
125	case 1:
126		ok=1;
127		break;
128	case 0:
129		OPENSSL_PUT_ERROR(X509, X509_REQ_check_private_key, X509_R_KEY_VALUES_MISMATCH);
130		break;
131	case -1:
132		OPENSSL_PUT_ERROR(X509, X509_REQ_check_private_key, X509_R_KEY_TYPE_MISMATCH);
133		break;
134	case -2:
135		if (k->type == EVP_PKEY_EC)
136			{
137			OPENSSL_PUT_ERROR(X509, X509_REQ_check_private_key, ERR_R_EC_LIB);
138			break;
139			}
140		if (k->type == EVP_PKEY_DH)
141			{
142			/* No idea */
143			OPENSSL_PUT_ERROR(X509, X509_REQ_check_private_key, X509_R_CANT_CHECK_DH_KEY);
144			break;
145			}
146	        OPENSSL_PUT_ERROR(X509, X509_REQ_check_private_key, X509_R_UNKNOWN_KEY_TYPE);
147		}
148
149	EVP_PKEY_free(xk);
150	return(ok);
151	}
152
153/* It seems several organisations had the same idea of including a list of
154 * extensions in a certificate request. There are at least two OIDs that are
155 * used and there may be more: so the list is configurable.
156 */
157
158static int ext_nid_list[] = { NID_ext_req, NID_ms_ext_req, NID_undef};
159
160static int *ext_nids = ext_nid_list;
161
162int X509_REQ_extension_nid(int req_nid)
163{
164	int i, nid;
165	for(i = 0; ; i++) {
166		nid = ext_nids[i];
167		if(nid == NID_undef) return 0;
168		else if (req_nid == nid) return 1;
169	}
170}
171
172int *X509_REQ_get_extension_nids(void)
173{
174	return ext_nids;
175}
176
177void X509_REQ_set_extension_nids(int *nids)
178{
179	ext_nids = nids;
180}
181
182STACK_OF(X509_EXTENSION) *X509_REQ_get_extensions(X509_REQ *req)
183	{
184	X509_ATTRIBUTE *attr;
185	ASN1_TYPE *ext = NULL;
186	int idx, *pnid;
187	const unsigned char *p;
188
189	if ((req == NULL) || (req->req_info == NULL) || !ext_nids)
190		return(NULL);
191	for (pnid = ext_nids; *pnid != NID_undef; pnid++)
192		{
193		idx = X509_REQ_get_attr_by_NID(req, *pnid, -1);
194		if (idx == -1)
195			continue;
196		attr = X509_REQ_get_attr(req, idx);
197		if(attr->single) ext = attr->value.single;
198		else if(sk_ASN1_TYPE_num(attr->value.set))
199			ext = sk_ASN1_TYPE_value(attr->value.set, 0);
200		break;
201		}
202	if(!ext || (ext->type != V_ASN1_SEQUENCE))
203		return NULL;
204	p = ext->value.sequence->data;
205	return (STACK_OF(X509_EXTENSION) *)
206		ASN1_item_d2i(NULL, &p, ext->value.sequence->length,
207				ASN1_ITEM_rptr(X509_EXTENSIONS));
208}
209
210/* Add a STACK_OF extensions to a certificate request: allow alternative OIDs
211 * in case we want to create a non standard one.
212 */
213
214int X509_REQ_add_extensions_nid(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts,
215				int nid)
216{
217	ASN1_TYPE *at = NULL;
218	X509_ATTRIBUTE *attr = NULL;
219	if(!(at = ASN1_TYPE_new()) ||
220		!(at->value.sequence = ASN1_STRING_new())) goto err;
221
222	at->type = V_ASN1_SEQUENCE;
223	/* Generate encoding of extensions */
224	at->value.sequence->length =
225			ASN1_item_i2d((ASN1_VALUE *)exts,
226				&at->value.sequence->data,
227				ASN1_ITEM_rptr(X509_EXTENSIONS));
228	if(!(attr = X509_ATTRIBUTE_new())) goto err;
229	if(!(attr->value.set = sk_ASN1_TYPE_new_null())) goto err;
230	if(!sk_ASN1_TYPE_push(attr->value.set, at)) goto err;
231	at = NULL;
232	attr->single = 0;
233	attr->object = (ASN1_OBJECT*) OBJ_nid2obj(nid);
234	if (!req->req_info->attributes)
235		{
236		if (!(req->req_info->attributes = sk_X509_ATTRIBUTE_new_null()))
237			goto err;
238		}
239	if(!sk_X509_ATTRIBUTE_push(req->req_info->attributes, attr)) goto err;
240	return 1;
241	err:
242	X509_ATTRIBUTE_free(attr);
243	ASN1_TYPE_free(at);
244	return 0;
245}
246/* This is the normal usage: use the "official" OID */
247int X509_REQ_add_extensions(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts)
248{
249	return X509_REQ_add_extensions_nid(req, exts, NID_ext_req);
250}
251
252/* Request attribute functions */
253
254int X509_REQ_get_attr_count(const X509_REQ *req)
255{
256	return X509at_get_attr_count(req->req_info->attributes);
257}
258
259int X509_REQ_get_attr_by_NID(const X509_REQ *req, int nid,
260			  int lastpos)
261{
262	return X509at_get_attr_by_NID(req->req_info->attributes, nid, lastpos);
263}
264
265int X509_REQ_get_attr_by_OBJ(const X509_REQ *req, ASN1_OBJECT *obj,
266			  int lastpos)
267{
268	return X509at_get_attr_by_OBJ(req->req_info->attributes, obj, lastpos);
269}
270
271X509_ATTRIBUTE *X509_REQ_get_attr(const X509_REQ *req, int loc)
272{
273	return X509at_get_attr(req->req_info->attributes, loc);
274}
275
276X509_ATTRIBUTE *X509_REQ_delete_attr(X509_REQ *req, int loc)
277{
278	return X509at_delete_attr(req->req_info->attributes, loc);
279}
280
281int X509_REQ_add1_attr(X509_REQ *req, X509_ATTRIBUTE *attr)
282{
283	if(X509at_add1_attr(&req->req_info->attributes, attr)) return 1;
284	return 0;
285}
286
287int X509_REQ_add1_attr_by_OBJ(X509_REQ *req,
288			const ASN1_OBJECT *obj, int type,
289			const unsigned char *bytes, int len)
290{
291	if(X509at_add1_attr_by_OBJ(&req->req_info->attributes, obj,
292				type, bytes, len)) return 1;
293	return 0;
294}
295
296int X509_REQ_add1_attr_by_NID(X509_REQ *req,
297			int nid, int type,
298			const unsigned char *bytes, int len)
299{
300	if(X509at_add1_attr_by_NID(&req->req_info->attributes, nid,
301				type, bytes, len)) return 1;
302	return 0;
303}
304
305int X509_REQ_add1_attr_by_txt(X509_REQ *req,
306			const char *attrname, int type,
307			const unsigned char *bytes, int len)
308{
309	if(X509at_add1_attr_by_txt(&req->req_info->attributes, attrname,
310				type, bytes, len)) return 1;
311	return 0;
312}
313