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, 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	if (pktmp == NULL)
96		goto err;
97	i=X509_REQ_set_pubkey(ret,pktmp);
98	EVP_PKEY_free(pktmp);
99	if (!i) goto err;
100
101	if (pkey != NULL)
102		{
103		if (!X509_REQ_sign(ret,pkey,md))
104			goto err;
105		}
106	return(ret);
107err:
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		{
127	case 1:
128		ok=1;
129		break;
130	case 0:
131		OPENSSL_PUT_ERROR(X509, X509_R_KEY_VALUES_MISMATCH);
132		break;
133	case -1:
134		OPENSSL_PUT_ERROR(X509, X509_R_KEY_TYPE_MISMATCH);
135		break;
136	case -2:
137		if (k->type == EVP_PKEY_EC)
138			{
139			OPENSSL_PUT_ERROR(X509, ERR_R_EC_LIB);
140			break;
141			}
142		if (k->type == EVP_PKEY_DH)
143			{
144			/* No idea */
145			OPENSSL_PUT_ERROR(X509, X509_R_CANT_CHECK_DH_KEY);
146			break;
147			}
148	        OPENSSL_PUT_ERROR(X509, X509_R_UNKNOWN_KEY_TYPE);
149		}
150
151	EVP_PKEY_free(xk);
152	return(ok);
153	}
154
155/* It seems several organisations had the same idea of including a list of
156 * extensions in a certificate request. There are at least two OIDs that are
157 * used and there may be more: so the list is configurable.
158 */
159
160static const int ext_nid_list[] = { NID_ext_req, NID_ms_ext_req, NID_undef};
161
162static const int *ext_nids = ext_nid_list;
163
164int X509_REQ_extension_nid(int req_nid)
165{
166	int i, nid;
167	for(i = 0; ; i++) {
168		nid = ext_nids[i];
169		if(nid == NID_undef) return 0;
170		else if (req_nid == nid) return 1;
171	}
172}
173
174const int *X509_REQ_get_extension_nids(void)
175{
176	return ext_nids;
177}
178
179void X509_REQ_set_extension_nids(const int *nids)
180{
181	ext_nids = nids;
182}
183
184STACK_OF(X509_EXTENSION) *X509_REQ_get_extensions(X509_REQ *req)
185	{
186	X509_ATTRIBUTE *attr;
187	ASN1_TYPE *ext = NULL;
188	int idx;
189	const int *pnid;
190	const unsigned char *p;
191
192	if ((req == NULL) || (req->req_info == NULL) || !ext_nids)
193		return(NULL);
194	for (pnid = ext_nids; *pnid != NID_undef; pnid++)
195		{
196		idx = X509_REQ_get_attr_by_NID(req, *pnid, -1);
197		if (idx == -1)
198			continue;
199		attr = X509_REQ_get_attr(req, idx);
200		if(attr->single) ext = attr->value.single;
201		else if(sk_ASN1_TYPE_num(attr->value.set))
202			ext = sk_ASN1_TYPE_value(attr->value.set, 0);
203		break;
204		}
205	if(!ext || (ext->type != V_ASN1_SEQUENCE))
206		return NULL;
207	p = ext->value.sequence->data;
208	return (STACK_OF(X509_EXTENSION) *)
209		ASN1_item_d2i(NULL, &p, ext->value.sequence->length,
210				ASN1_ITEM_rptr(X509_EXTENSIONS));
211}
212
213/* Add a STACK_OF extensions to a certificate request: allow alternative OIDs
214 * in case we want to create a non standard one.
215 */
216
217int X509_REQ_add_extensions_nid(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts,
218				int nid)
219{
220	ASN1_TYPE *at = NULL;
221	X509_ATTRIBUTE *attr = NULL;
222	if(!(at = ASN1_TYPE_new()) ||
223		!(at->value.sequence = ASN1_STRING_new())) goto err;
224
225	at->type = V_ASN1_SEQUENCE;
226	/* Generate encoding of extensions */
227	at->value.sequence->length =
228			ASN1_item_i2d((ASN1_VALUE *)exts,
229				&at->value.sequence->data,
230				ASN1_ITEM_rptr(X509_EXTENSIONS));
231	if(!(attr = X509_ATTRIBUTE_new())) goto err;
232	if(!(attr->value.set = sk_ASN1_TYPE_new_null())) goto err;
233	if(!sk_ASN1_TYPE_push(attr->value.set, at)) goto err;
234	at = NULL;
235	attr->single = 0;
236	attr->object = (ASN1_OBJECT*) OBJ_nid2obj(nid);
237	if (!req->req_info->attributes)
238		{
239		if (!(req->req_info->attributes = sk_X509_ATTRIBUTE_new_null()))
240			goto err;
241		}
242	if(!sk_X509_ATTRIBUTE_push(req->req_info->attributes, attr)) goto err;
243	return 1;
244	err:
245	X509_ATTRIBUTE_free(attr);
246	ASN1_TYPE_free(at);
247	return 0;
248}
249/* This is the normal usage: use the "official" OID */
250int X509_REQ_add_extensions(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts)
251{
252	return X509_REQ_add_extensions_nid(req, exts, NID_ext_req);
253}
254
255/* Request attribute functions */
256
257int X509_REQ_get_attr_count(const X509_REQ *req)
258{
259	return X509at_get_attr_count(req->req_info->attributes);
260}
261
262int X509_REQ_get_attr_by_NID(const X509_REQ *req, int nid,
263			  int lastpos)
264{
265	return X509at_get_attr_by_NID(req->req_info->attributes, nid, lastpos);
266}
267
268int X509_REQ_get_attr_by_OBJ(const X509_REQ *req, ASN1_OBJECT *obj,
269			  int lastpos)
270{
271	return X509at_get_attr_by_OBJ(req->req_info->attributes, obj, lastpos);
272}
273
274X509_ATTRIBUTE *X509_REQ_get_attr(const X509_REQ *req, int loc)
275{
276	return X509at_get_attr(req->req_info->attributes, loc);
277}
278
279X509_ATTRIBUTE *X509_REQ_delete_attr(X509_REQ *req, int loc)
280{
281	return X509at_delete_attr(req->req_info->attributes, loc);
282}
283
284int X509_REQ_add1_attr(X509_REQ *req, X509_ATTRIBUTE *attr)
285{
286	if(X509at_add1_attr(&req->req_info->attributes, attr)) return 1;
287	return 0;
288}
289
290int X509_REQ_add1_attr_by_OBJ(X509_REQ *req,
291			const ASN1_OBJECT *obj, int type,
292			const unsigned char *bytes, int len)
293{
294	if(X509at_add1_attr_by_OBJ(&req->req_info->attributes, obj,
295				type, bytes, len)) return 1;
296	return 0;
297}
298
299int X509_REQ_add1_attr_by_NID(X509_REQ *req,
300			int nid, int type,
301			const unsigned char *bytes, int len)
302{
303	if(X509at_add1_attr_by_NID(&req->req_info->attributes, nid,
304				type, bytes, len)) return 1;
305	return 0;
306}
307
308int X509_REQ_add1_attr_by_txt(X509_REQ *req,
309			const char *attrname, int type,
310			const unsigned char *bytes, int len)
311{
312	if(X509at_add1_attr_by_txt(&req->req_info->attributes, attrname,
313				type, bytes, len)) return 1;
314	return 0;
315}
316