/* crypto/asn1/x_name.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/asn1t.h>

#include <openssl/x509.h>

static int x509_name_ex_d2i(ASN1_VALUE **val, const unsigned char **in, long len, const ASN1_ITEM *it,

					int tag, int aclass, char opt, ASN1_TLC *ctx);

static int x509_name_ex_i2d(ASN1_VALUE **val, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);

static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it);

static void x509_name_ex_free(ASN1_VALUE **val, const ASN1_ITEM *it);

static int x509_name_encode(X509_NAME *a);

ASN1_SEQUENCE(X509_NAME_ENTRY) = {

	ASN1_SIMPLE(X509_NAME_ENTRY, object, ASN1_OBJECT),

	ASN1_SIMPLE(X509_NAME_ENTRY, value, ASN1_PRINTABLE)

} ASN1_SEQUENCE_END(X509_NAME_ENTRY)

IMPLEMENT_ASN1_FUNCTIONS(X509_NAME_ENTRY)

IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME_ENTRY)

/* For the "Name" type we need a SEQUENCE OF { SET OF X509_NAME_ENTRY }

 * so declare two template wrappers for this

 */

ASN1_ITEM_TEMPLATE(X509_NAME_ENTRIES) =

	ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_OF, 0, RDNS, X509_NAME_ENTRY)

ASN1_ITEM_TEMPLATE_END(X509_NAME_ENTRIES)

ASN1_ITEM_TEMPLATE(X509_NAME_INTERNAL) =

	ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, Name, X509_NAME_ENTRIES)

ASN1_ITEM_TEMPLATE_END(X509_NAME_INTERNAL)

/* Normally that's where it would end: we'd have two nested STACK structures

 * representing the ASN1. Unfortunately X509_NAME uses a completely different

 * form and caches encodings so we have to process the internal form and convert

 * to the external form.

 */

const ASN1_EXTERN_FUNCS x509_name_ff = {

	NULL,

	x509_name_ex_new,

	x509_name_ex_free,

	0,	/* Default clear behaviour is OK */

	x509_name_ex_d2i,

	x509_name_ex_i2d

};

IMPLEMENT_EXTERN_ASN1(X509_NAME, V_ASN1_SEQUENCE, x509_name_ff) 

IMPLEMENT_ASN1_FUNCTIONS(X509_NAME)

IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME)

static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it)

{

	X509_NAME *ret = NULL;

	ret = OPENSSL_malloc(sizeof(X509_NAME));

	if(!ret) goto memerr;

	if ((ret->entries=sk_X509_NAME_ENTRY_new_null()) == NULL)

		goto memerr;

	if((ret->bytes = BUF_MEM_new()) == NULL) goto memerr;

	ret->modified=1;

	*val = (ASN1_VALUE *)ret;

	return 1;

 memerr:

	ASN1err(ASN1_F_X509_NAME_EX_NEW, ERR_R_MALLOC_FAILURE);

	if (ret)

		{

		if (ret->entries)

			sk_X509_NAME_ENTRY_free(ret->entries);

		OPENSSL_free(ret);

		}

	return 0;

}

static void x509_name_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)

{

	X509_NAME *a;

	if(!pval || !*pval)

	    return;

	a = (X509_NAME *)*pval;

	BUF_MEM_free(a->bytes);

	sk_X509_NAME_ENTRY_pop_free(a->entries,X509_NAME_ENTRY_free);

	OPENSSL_free(a);

	*pval = NULL;

}

/* Used with sk_pop_free() to free up the internal representation.

 * NB: we only free the STACK and not its contents because it is

 * already present in the X509_NAME structure.

 */

static void sk_internal_free(void *a)

{

	sk_free(a);

}

static int x509_name_ex_d2i(ASN1_VALUE **val, const unsigned char **in, long len, const ASN1_ITEM *it,

					int tag, int aclass, char opt, ASN1_TLC *ctx)

{

	const unsigned char *p = *in, *q;

	union { STACK *s; ASN1_VALUE *a; } intname = {NULL};

	union { X509_NAME *x; ASN1_VALUE *a; } nm = {NULL};

	int i, j, ret;

	STACK_OF(X509_NAME_ENTRY) *entries;

	X509_NAME_ENTRY *entry;

	q = p;

	/* Get internal representation of Name */

	ret = ASN1_item_ex_d2i(&intname.a,

			       &p, len, ASN1_ITEM_rptr(X509_NAME_INTERNAL),

			       tag, aclass, opt, ctx);

	if(ret <= 0) return ret;

	if(*val) x509_name_ex_free(val, NULL);

	if(!x509_name_ex_new(&nm.a, NULL)) goto err;

	/* We've decoded it: now cache encoding */

	if(!BUF_MEM_grow(nm.x->bytes, p - q)) goto err;

	memcpy(nm.x->bytes->data, q, p - q);

	/* Convert internal representation to X509_NAME structure */

	for(i = 0; i < sk_num(intname.s); i++) {

		entries = (STACK_OF(X509_NAME_ENTRY) *)sk_value(intname.s, i);

		for(j = 0; j < sk_X509_NAME_ENTRY_num(entries); j++) {

			entry = sk_X509_NAME_ENTRY_value(entries, j);

			entry->set = i;

			if(!sk_X509_NAME_ENTRY_push(nm.x->entries, entry))

				goto err;

		}

		sk_X509_NAME_ENTRY_free(entries);

	}

	sk_free(intname.s);

	nm.x->modified = 0;

	*val = nm.a;

	*in = p;

	return ret;

	err:

	ASN1err(ASN1_F_X509_NAME_EX_D2I, ERR_R_NESTED_ASN1_ERROR);

	return 0;

}

static int x509_name_ex_i2d(ASN1_VALUE **val, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass)

{

	int ret;

	X509_NAME *a = (X509_NAME *)*val;

	if(a->modified) {

		ret = x509_name_encode((X509_NAME *)a);

		if(ret < 0) return ret;

	}

	ret = a->bytes->length;

	if(out != NULL) {

		memcpy(*out,a->bytes->data,ret);

		*out+=ret;

	}

	return ret;

}

static int x509_name_encode(X509_NAME *a)

{

	union { STACK *s; ASN1_VALUE *a; } intname = {NULL};

	int len;

	unsigned char *p;

	STACK_OF(X509_NAME_ENTRY) *entries = NULL;

	X509_NAME_ENTRY *entry;

	int i, set = -1;

	intname.s = sk_new_null();

	if(!intname.s) goto memerr;

	for(i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {

		entry = sk_X509_NAME_ENTRY_value(a->entries, i);

		if(entry->set != set) {

			entries = sk_X509_NAME_ENTRY_new_null();

			if(!entries) goto memerr;

			if(!sk_push(intname.s, (char *)entries)) goto memerr;

			set = entry->set;

		}

		if(!sk_X509_NAME_ENTRY_push(entries, entry)) goto memerr;

	}

	len = ASN1_item_ex_i2d(&intname.a, NULL,

			       ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);

	if (!BUF_MEM_grow(a->bytes,len)) goto memerr;

	p=(unsigned char *)a->bytes->data;

	ASN1_item_ex_i2d(&intname.a,

			 &p, ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);

	sk_pop_free(intname.s, sk_internal_free);

	a->modified = 0;

	return len;

	memerr:

	sk_pop_free(intname.s, sk_internal_free);

	ASN1err(ASN1_F_X509_NAME_ENCODE, ERR_R_MALLOC_FAILURE);

	return -1;

}

EXPORT_C int X509_NAME_set(X509_NAME **xn, X509_NAME *name)

	{

	X509_NAME *in;

	if (!xn || !name) return(0);

	if (*xn != name)

		{

		in=X509_NAME_dup(name);

		if (in != NULL)

			{

			X509_NAME_free(*xn);

			*xn=in;

			}

		}

	return(*xn != NULL);

	}

IMPLEMENT_STACK_OF(X509_NAME_ENTRY)

IMPLEMENT_ASN1_SET_OF(X509_NAME_ENTRY)