/* crypto/asn1/x_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/asn1_mac.h>
#include <openssl/x509.h>

int i2d_X509_REQ_INFO(X509_REQ_INFO *a, unsigned char **pp)
	{
	M_ASN1_I2D_vars(a);

	if(a->asn1) {
		if(pp) {
			memcpy(*pp, a->asn1, a->length);
			*pp += a->length;
		}
		return a->length;
	}

	M_ASN1_I2D_len(a->version,		i2d_ASN1_INTEGER);
	M_ASN1_I2D_len(a->subject,		i2d_X509_NAME);
	M_ASN1_I2D_len(a->pubkey,		i2d_X509_PUBKEY);

	/* this is a *nasty* hack reported to be required to
	 * allow some CA Software to accept the cert request.
	 * It is not following the PKCS standards ...
	 * PKCS#10 pg 5
	 * attributes [0] IMPLICIT Attributes
	 * NOTE: no OPTIONAL ... so it *must* be there
	 */
	if (a->req_kludge) 
	        {
	        M_ASN1_I2D_len_IMP_SET_opt_type(X509_ATTRIBUTE,a->attributes,i2d_X509_ATTRIBUTE,0);
		}
	else
	        {
	        M_ASN1_I2D_len_IMP_SET_type(X509_ATTRIBUTE,a->attributes,
					    i2d_X509_ATTRIBUTE,0);
		}
	
	M_ASN1_I2D_seq_total();
	M_ASN1_I2D_put(a->version,		i2d_ASN1_INTEGER);
	M_ASN1_I2D_put(a->subject,		i2d_X509_NAME);
	M_ASN1_I2D_put(a->pubkey,		i2d_X509_PUBKEY);

	/* this is a *nasty* hack reported to be required by some CA's.
	 * It is not following the PKCS standards ...
	 * PKCS#10 pg 5
	 * attributes [0] IMPLICIT Attributes
	 * NOTE: no OPTIONAL ... so it *must* be there
	 */
	if (a->req_kludge)
		{
	        M_ASN1_I2D_put_IMP_SET_opt_type(X509_ATTRIBUTE,a->attributes,
						i2d_X509_ATTRIBUTE,0);
		}
	else
		{
	        M_ASN1_I2D_put_IMP_SET_type(X509_ATTRIBUTE,a->attributes,
					    i2d_X509_ATTRIBUTE,0);
		}

	M_ASN1_I2D_finish();
	}

X509_REQ_INFO *d2i_X509_REQ_INFO(X509_REQ_INFO **a, unsigned char **pp,
	     long length)
	{
	M_ASN1_D2I_vars(a,X509_REQ_INFO *,X509_REQ_INFO_new);

	M_ASN1_D2I_Init();
	M_ASN1_D2I_start_sequence();
	M_ASN1_D2I_get(ret->version,d2i_ASN1_INTEGER);
	M_ASN1_D2I_get(ret->subject,d2i_X509_NAME);
	M_ASN1_D2I_get(ret->pubkey,d2i_X509_PUBKEY);

	/* this is a *nasty* hack to allow for some CA's that
	 * have been reported as requiring it.
	 * It is not following the PKCS standards ...
	 * PKCS#10 pg 5
	 * attributes [0] IMPLICIT Attributes
	 * NOTE: no OPTIONAL ... so it *must* be there
	 */
	if (asn1_Finish(&c))
		ret->req_kludge=1;
	else
		{
		M_ASN1_D2I_get_IMP_set_type(X509_ATTRIBUTE,ret->attributes,
					    d2i_X509_ATTRIBUTE,
					    X509_ATTRIBUTE_free,0);
		}

	M_ASN1_D2I_Finish(a,X509_REQ_INFO_free,ASN1_F_D2I_X509_REQ_INFO);
	}

X509_REQ_INFO *X509_REQ_INFO_new(void)
	{
	X509_REQ_INFO *ret=NULL;
	ASN1_CTX c;

	M_ASN1_New_Malloc(ret,X509_REQ_INFO);
	M_ASN1_New(ret->version,M_ASN1_INTEGER_new);
	M_ASN1_New(ret->subject,X509_NAME_new);
	M_ASN1_New(ret->pubkey,X509_PUBKEY_new);
	M_ASN1_New(ret->attributes,sk_X509_ATTRIBUTE_new_null);
	ret->req_kludge=0;
	ret->asn1 = NULL;
	return(ret);
	M_ASN1_New_Error(ASN1_F_X509_REQ_INFO_NEW);
	}
	
void X509_REQ_INFO_free(X509_REQ_INFO *a)
	{
	if (a == NULL) return;
	if(a->asn1) OPENSSL_free(a->asn1);
	M_ASN1_INTEGER_free(a->version);
	X509_NAME_free(a->subject);
	X509_PUBKEY_free(a->pubkey);
	sk_X509_ATTRIBUTE_pop_free(a->attributes,X509_ATTRIBUTE_free);
	OPENSSL_free(a);
	}

int i2d_X509_REQ(X509_REQ *a, unsigned char **pp)
	{
	M_ASN1_I2D_vars(a);
	M_ASN1_I2D_len(a->req_info,	i2d_X509_REQ_INFO);
	M_ASN1_I2D_len(a->sig_alg,	i2d_X509_ALGOR);
	M_ASN1_I2D_len(a->signature,	i2d_ASN1_BIT_STRING);

	M_ASN1_I2D_seq_total();

	M_ASN1_I2D_put(a->req_info,	i2d_X509_REQ_INFO);
	M_ASN1_I2D_put(a->sig_alg,	i2d_X509_ALGOR);
	M_ASN1_I2D_put(a->signature,	i2d_ASN1_BIT_STRING);

	M_ASN1_I2D_finish();
	}

X509_REQ *d2i_X509_REQ(X509_REQ **a, unsigned char **pp, long length)
	{
	M_ASN1_D2I_vars(a,X509_REQ *,X509_REQ_new);

	M_ASN1_D2I_Init();
	M_ASN1_D2I_start_sequence();
	M_ASN1_D2I_get(ret->req_info,d2i_X509_REQ_INFO);

	/* Keep a copy of the original encoding for signature checking */
	ret->req_info->length = c.p - c.q;
	if(!(ret->req_info->asn1 = OPENSSL_malloc(ret->req_info->length))) {
		c.line=__LINE__;
		c.error = ERR_R_MALLOC_FAILURE;
		goto err;
	}

	memcpy(ret->req_info->asn1, c.q, ret->req_info->length);

	M_ASN1_D2I_get(ret->sig_alg,d2i_X509_ALGOR);
	M_ASN1_D2I_get(ret->signature,d2i_ASN1_BIT_STRING);
	M_ASN1_D2I_Finish(a,X509_REQ_free,ASN1_F_D2I_X509_REQ);
	}

X509_REQ *X509_REQ_new(void)
	{
	X509_REQ *ret=NULL;
	ASN1_CTX c;

	M_ASN1_New_Malloc(ret,X509_REQ);
	ret->references=1;
	M_ASN1_New(ret->req_info,X509_REQ_INFO_new);
	M_ASN1_New(ret->sig_alg,X509_ALGOR_new);
	M_ASN1_New(ret->signature,M_ASN1_BIT_STRING_new);
	return(ret);
	M_ASN1_New_Error(ASN1_F_X509_REQ_NEW);
	}

void X509_REQ_free(X509_REQ *a)
	{
	int i;

	if (a == NULL) return;

	i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_X509_REQ);
#ifdef REF_PRINT
	REF_PRINT("X509_REQ",a);
#endif
	if (i > 0) return;
#ifdef REF_CHECK
	if (i < 0)
		{
		fprintf(stderr,"X509_REQ_free, bad reference count\n");
		abort();
		}
#endif

	X509_REQ_INFO_free(a->req_info);
	X509_ALGOR_free(a->sig_alg);
	M_ASN1_BIT_STRING_free(a->signature);
	OPENSSL_free(a);
	}