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      1 /* crypto/x509/x509_req.c */
      2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com)
      3  * All rights reserved.
      4  *
      5  * This package is an SSL implementation written
      6  * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 
     70 X509_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);
    107 err:
    108 	X509_REQ_free(ret);
    109 	return(NULL);
    110 	}
    111 
    112 EVP_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 
    119 int 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 
    160 static const int ext_nid_list[] = { NID_ext_req, NID_ms_ext_req, NID_undef};
    161 
    162 static const int *ext_nids = ext_nid_list;
    163 
    164 int 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 
    174 const int *X509_REQ_get_extension_nids(void)
    175 {
    176 	return ext_nids;
    177 }
    178 
    179 void X509_REQ_set_extension_nids(const int *nids)
    180 {
    181 	ext_nids = nids;
    182 }
    183 
    184 STACK_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 
    217 int 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 */
    250 int 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 
    257 int X509_REQ_get_attr_count(const X509_REQ *req)
    258 {
    259 	return X509at_get_attr_count(req->req_info->attributes);
    260 }
    261 
    262 int 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 
    268 int 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 
    274 X509_ATTRIBUTE *X509_REQ_get_attr(const X509_REQ *req, int loc)
    275 {
    276 	return X509at_get_attr(req->req_info->attributes, loc);
    277 }
    278 
    279 X509_ATTRIBUTE *X509_REQ_delete_attr(X509_REQ *req, int loc)
    280 {
    281 	return X509at_delete_attr(req->req_info->attributes, loc);
    282 }
    283 
    284 int 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 
    290 int 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 
    299 int 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 
    308 int 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