/* crypto/x509/x509_req.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <stdio.h>
#include "cryptlib.h"
#include <openssl/bn.h>
#include <openssl/evp.h>
#include <openssl/asn1.h>
#include <openssl/x509.h>
#include <openssl/objects.h>
#include <openssl/buffer.h>
#include <openssl/pem.h>

X509_REQ *X509_to_X509_REQ(X509 *x, EVP_PKEY *pkey, EVP_MD *md)
	{
	X509_REQ *ret;
	X509_REQ_INFO *ri;
	int i;
	EVP_PKEY *pktmp;

	ret=X509_REQ_new();
	if (ret == NULL)
		{
		X509err(X509_F_X509_TO_X509_REQ,ERR_R_MALLOC_FAILURE);
		goto err;
		}

	ri=ret->req_info;

	ri->version->length=1;
	ri->version->data=(unsigned char *)Malloc(1);
	if (ri->version->data == NULL) goto err;
	ri->version->data[0]=0; /* version == 0 */

	if (!X509_REQ_set_subject_name(ret,X509_get_subject_name(x)))
		goto err;

	pktmp = X509_get_pubkey(x);
	i=X509_REQ_set_pubkey(ret,pktmp);
	EVP_PKEY_free(pktmp);
	if (!i) goto err;

	if (pkey != NULL)
		{
		if (!X509_REQ_sign(ret,pkey,md))
			goto err;
		}
	return(ret);
err:
	X509_REQ_free(ret);
	return(NULL);
	}

EVP_PKEY *X509_REQ_get_pubkey(X509_REQ *req)
	{
	if ((req == NULL) || (req->req_info == NULL))
		return(NULL);
	return(X509_PUBKEY_get(req->req_info->pubkey));
	}

/* It seems several organisations had the same idea of including a list of
 * extensions in a certificate request. There are at least two OIDs that are
 * used and there may be more: so the list is configurable.
 */

static int ext_nid_list[] = { NID_ms_ext_req, NID_ext_req, NID_undef};

static int *ext_nids = ext_nid_list;

int X509_REQ_extension_nid(int req_nid)
{
	int i, nid;
	for(i = 0; ; i++) {
		nid = ext_nids[i];
		if(nid == NID_undef) return 0;
		else if (req_nid == nid) return 1;
	}
}

int *X509_REQ_get_extesion_nids(void)
{
	return ext_nids;
}
	
void X509_REQ_set_extension_nids(int *nids)
{
	ext_nids = nids;
}

STACK_OF(X509_EXTENSION) *X509_REQ_get_extensions(X509_REQ *req)
{
	X509_ATTRIBUTE *attr;
	STACK_OF(X509_ATTRIBUTE) *sk;
	ASN1_TYPE *ext = NULL;
	int i;
	unsigned char *p;
	if ((req == NULL) || (req->req_info == NULL))
		return(NULL);
	sk=req->req_info->attributes;
        if (!sk) return NULL;
	for(i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
		attr = sk_X509_ATTRIBUTE_value(sk, i);
		if(X509_REQ_extension_nid(OBJ_obj2nid(attr->object))) {
			if(attr->set && sk_ASN1_TYPE_num(attr->value.set))
				ext = sk_ASN1_TYPE_value(attr->value.set, 0);
			else ext = attr->value.single;
			break;
		}
	}
	if(!ext || (ext->type != V_ASN1_SEQUENCE)) return NULL;
	p = ext->value.sequence->data;
	return d2i_ASN1_SET_OF_X509_EXTENSION(NULL, &p,
			ext->value.sequence->length,
			d2i_X509_EXTENSION, X509_EXTENSION_free,
			V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL);
}