/* crypto/asn1/x_x509.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/evp.h>
#include <openssl/asn1_mac.h>
#include <openssl/x509.h>

static int x509_meth_num = 0;
static STACK *x509_meth = NULL;

static ASN1_METHOD meth={
	(int (*)())  i2d_X509,
	(char *(*)())d2i_X509,
	(char *(*)())X509_new,
	(void (*)()) X509_free};

ASN1_METHOD *X509_asn1_meth(void)
	{
	return(&meth);
	}

int i2d_X509(X509 *a, unsigned char **pp)
	{
	M_ASN1_I2D_vars(a);

	M_ASN1_I2D_len(a->cert_info,	i2d_X509_CINF);
	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->cert_info,	i2d_X509_CINF);
	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 *d2i_X509(X509 **a, unsigned char **pp, long length)
	{
	M_ASN1_D2I_vars(a,X509 *,X509_new);

	M_ASN1_D2I_Init();
	M_ASN1_D2I_start_sequence();
	M_ASN1_D2I_get(ret->cert_info,d2i_X509_CINF);
	M_ASN1_D2I_get(ret->sig_alg,d2i_X509_ALGOR);
	M_ASN1_D2I_get(ret->signature,d2i_ASN1_BIT_STRING);
	if (ret->name != NULL) Free(ret->name);
	ret->name=X509_NAME_oneline(ret->cert_info->subject,NULL,0);

	M_ASN1_D2I_Finish(a,X509_free,ASN1_F_D2I_X509);
	}

X509 *X509_new(void)
	{
	X509 *ret=NULL;
	ASN1_CTX c;

	M_ASN1_New_Malloc(ret,X509);
	ret->references=1;
	ret->valid=0;
	ret->ex_flags = 0;
	ret->name=NULL;
	ret->aux=NULL;
	M_ASN1_New(ret->cert_info,X509_CINF_new);
	M_ASN1_New(ret->sig_alg,X509_ALGOR_new);
	M_ASN1_New(ret->signature,M_ASN1_BIT_STRING_new);
	CRYPTO_new_ex_data(x509_meth, (char *)ret, &ret->ex_data);
	return(ret);
	M_ASN1_New_Error(ASN1_F_X509_NEW);
	}

void X509_free(X509 *a)
	{
	int i;

	if (a == NULL) return;

	i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_X509);
#ifdef REF_PRINT
	REF_PRINT("X509",a);
#endif
	if (i > 0) return;
#ifdef REF_CHECK
	if (i < 0)
		{
		fprintf(stderr,"X509_free, bad reference count\n");
		abort();
		}
#endif

	CRYPTO_free_ex_data(x509_meth,(char *)a,&a->ex_data);
	X509_CINF_free(a->cert_info);
	X509_ALGOR_free(a->sig_alg);
	M_ASN1_BIT_STRING_free(a->signature);
	X509_CERT_AUX_free(a->aux);

	if (a->name != NULL) Free(a->name);
	Free((char *)a);
	}

int X509_get_ex_new_index(long argl, char *argp, int (*new_func)(),
	     int (*dup_func)(), void (*free_func)())
        {
	x509_meth_num++;
	return(CRYPTO_get_ex_new_index(x509_meth_num-1,
		&x509_meth,argl,argp,new_func,dup_func,free_func));
        }

int X509_set_ex_data(X509 *r, int idx, char *arg)
	{
	return(CRYPTO_set_ex_data(&r->ex_data,idx,arg));
	}

char *X509_get_ex_data(X509 *r, int idx)
	{
	return(CRYPTO_get_ex_data(&r->ex_data,idx));
	}

/* X509_AUX ASN1 routines. X509_AUX is the name given to
 * a certificate with extra info tagged on the end. Since these
 * functions set how a certificate is trusted they should only
 * be used when the certificate comes from a reliable source
 * such as local storage.
 *
 */

X509 *d2i_X509_AUX(X509 **a, unsigned char **pp, long length)
{
	unsigned char *q;
	X509 *ret;
	/* Save start position */
	q = *pp;
	ret = d2i_X509(a, pp, length);
	/* If certificate unreadable then forget it */
	if(!ret) return NULL;
	/* update length */
	length -= *pp - q;
	if(!length) return ret;
	if(!d2i_X509_CERT_AUX(&ret->aux, pp, length)) goto err;
	return ret;
	err:
	X509_free(ret);
	return NULL;
}

int i2d_X509_AUX(X509 *a, unsigned char **pp)
{
	int length;
	length = i2d_X509(a, pp);
	if(a) length += i2d_X509_CERT_AUX(a->aux, pp);
	return length;
}