/* crypto/x509/x509name.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 <openssl/stack.h>

#include "cryptlib.h"

#include <openssl/asn1.h>

#include <openssl/objects.h>

#include <openssl/evp.h>

#include <openssl/x509.h>

EXPORT_C int X509_NAME_get_text_by_NID(X509_NAME *name, int nid, char *buf, int len)

	{

	ASN1_OBJECT *obj;

	obj=OBJ_nid2obj(nid);

	if (obj == NULL) return(-1);

	return(X509_NAME_get_text_by_OBJ(name,obj,buf,len));

	}

EXPORT_C int X509_NAME_get_text_by_OBJ(X509_NAME *name, ASN1_OBJECT *obj, char *buf,

	     int len)

	{

	int i;

	ASN1_STRING *data;

	i=X509_NAME_get_index_by_OBJ(name,obj,-1);

	if (i < 0) return(-1);

	data=X509_NAME_ENTRY_get_data(X509_NAME_get_entry(name,i));

	i=(data->length > (len-1))?(len-1):data->length;

	if (buf == NULL) return(data->length);

	memcpy(buf,data->data,i);

	buf[i]='\0';

	return(i);

	}

EXPORT_C int X509_NAME_entry_count(X509_NAME *name)

	{

	if (name == NULL) return(0);

	return(sk_X509_NAME_ENTRY_num(name->entries));

	}

EXPORT_C int X509_NAME_get_index_by_NID(X509_NAME *name, int nid, int lastpos)

	{

	ASN1_OBJECT *obj;

	obj=OBJ_nid2obj(nid);

	if (obj == NULL) return(-2);

	return(X509_NAME_get_index_by_OBJ(name,obj,lastpos));

	}

/* NOTE: you should be passsing -1, not 0 as lastpos */

EXPORT_C int X509_NAME_get_index_by_OBJ(X509_NAME *name, ASN1_OBJECT *obj,

	     int lastpos)

	{

	int n;

	X509_NAME_ENTRY *ne;

	STACK_OF(X509_NAME_ENTRY) *sk;

	if (name == NULL) return(-1);

	if (lastpos < 0)

		lastpos= -1;

	sk=name->entries;

	n=sk_X509_NAME_ENTRY_num(sk);

	for (lastpos++; lastpos < n; lastpos++)

		{

		ne=sk_X509_NAME_ENTRY_value(sk,lastpos);

		if (OBJ_cmp(ne->object,obj) == 0)

			return(lastpos);

		}

	return(-1);

	}

EXPORT_C X509_NAME_ENTRY *X509_NAME_get_entry(X509_NAME *name, int loc)

	{

	if(name == NULL || sk_X509_NAME_ENTRY_num(name->entries) <= loc

	   || loc < 0)

		return(NULL);

	else

		return(sk_X509_NAME_ENTRY_value(name->entries,loc));

	}

EXPORT_C X509_NAME_ENTRY *X509_NAME_delete_entry(X509_NAME *name, int loc)

	{

	X509_NAME_ENTRY *ret;

	int i,n,set_prev,set_next;

	STACK_OF(X509_NAME_ENTRY) *sk;

	if (name == NULL || sk_X509_NAME_ENTRY_num(name->entries) <= loc

	    || loc < 0)

		return(NULL);

	sk=name->entries;

	ret=sk_X509_NAME_ENTRY_delete(sk,loc);

	n=sk_X509_NAME_ENTRY_num(sk);

	name->modified=1;

	if (loc == n) return(ret);

	/* else we need to fixup the set field */

	if (loc != 0)

		set_prev=(sk_X509_NAME_ENTRY_value(sk,loc-1))->set;

	else

		set_prev=ret->set-1;

	set_next=sk_X509_NAME_ENTRY_value(sk,loc)->set;

	/* set_prev is the previous set

	 * set is the current set

	 * set_next is the following

	 * prev  1 1	1 1	1 1	1 1

	 * set   1	1	2	2

	 * next  1 1	2 2	2 2	3 2

	 * so basically only if prev and next differ by 2, then

	 * re-number down by 1 */

	if (set_prev+1 < set_next)

		for (i=loc; i<n; i++)

			sk_X509_NAME_ENTRY_value(sk,i)->set--;

	return(ret);

	}

EXPORT_C int X509_NAME_add_entry_by_OBJ(X509_NAME *name, ASN1_OBJECT *obj, int type,

			unsigned char *bytes, int len, int loc, int set)

{

	X509_NAME_ENTRY *ne;

	int ret;

	ne = X509_NAME_ENTRY_create_by_OBJ(NULL, obj, type, bytes, len);

	if(!ne) return 0;

	ret = X509_NAME_add_entry(name, ne, loc, set);

	X509_NAME_ENTRY_free(ne);

	return ret;

}

EXPORT_C int X509_NAME_add_entry_by_NID(X509_NAME *name, int nid, int type,

			unsigned char *bytes, int len, int loc, int set)

{

	X509_NAME_ENTRY *ne;

	int ret;

	ne = X509_NAME_ENTRY_create_by_NID(NULL, nid, type, bytes, len);

	if(!ne) return 0;

	ret = X509_NAME_add_entry(name, ne, loc, set);

	X509_NAME_ENTRY_free(ne);

	return ret;

}

EXPORT_C int X509_NAME_add_entry_by_txt(X509_NAME *name, const char *field, int type,

			const unsigned char *bytes, int len, int loc, int set)

{

	X509_NAME_ENTRY *ne;

	int ret;

	ne = X509_NAME_ENTRY_create_by_txt(NULL, field, type, bytes, len);

	if(!ne) return 0;

	ret = X509_NAME_add_entry(name, ne, loc, set);

	X509_NAME_ENTRY_free(ne);

	return ret;

}

/* if set is -1, append to previous set, 0 'a new one', and 1,

 * prepend to the guy we are about to stomp on. */

EXPORT_C int X509_NAME_add_entry(X509_NAME *name, X509_NAME_ENTRY *ne, int loc,

	     int set)

	{

	X509_NAME_ENTRY *new_name=NULL;

	int n,i,inc;

	STACK_OF(X509_NAME_ENTRY) *sk;

	if (name == NULL) return(0);

	sk=name->entries;

	n=sk_X509_NAME_ENTRY_num(sk);

	if (loc > n) loc=n;

	else if (loc < 0) loc=n;

	name->modified=1;

	if (set == -1)

		{

		if (loc == 0)

			{

			set=0;

			inc=1;

			}

		else

			{

			set=sk_X509_NAME_ENTRY_value(sk,loc-1)->set;

			inc=0;

			}

		}

	else /* if (set >= 0) */

		{

		if (loc >= n)

			{

			if (loc != 0)

				set=sk_X509_NAME_ENTRY_value(sk,loc-1)->set+1;

			else

				set=0;

			}

		else

			set=sk_X509_NAME_ENTRY_value(sk,loc)->set;

		inc=(set == 0)?1:0;

		}

	if ((new_name=X509_NAME_ENTRY_dup(ne)) == NULL)

		goto err;

	new_name->set=set;

	if (!sk_X509_NAME_ENTRY_insert(sk,new_name,loc))

		{

		X509err(X509_F_X509_NAME_ADD_ENTRY,ERR_R_MALLOC_FAILURE);

		goto err;

		}

	if (inc)

		{

		n=sk_X509_NAME_ENTRY_num(sk);

		for (i=loc+1; i<n; i++)

			sk_X509_NAME_ENTRY_value(sk,i-1)->set+=1;

		}	

	return(1);

err:

	if (new_name != NULL)

		X509_NAME_ENTRY_free(new_name);

	return(0);

	}

EXPORT_C X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_txt(X509_NAME_ENTRY **ne,

		const char *field, int type, const unsigned char *bytes, int len)

	{

	ASN1_OBJECT *obj;

	X509_NAME_ENTRY *nentry;

	obj=OBJ_txt2obj(field, 0);

	if (obj == NULL)

		{

		X509err(X509_F_X509_NAME_ENTRY_CREATE_BY_TXT,

						X509_R_INVALID_FIELD_NAME);

		ERR_add_error_data(2, "name=", field);

		return(NULL);

		}

	nentry = X509_NAME_ENTRY_create_by_OBJ(ne,obj,type,bytes,len);

	ASN1_OBJECT_free(obj);

	return nentry;

	}

EXPORT_C X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_NID(X509_NAME_ENTRY **ne, int nid,

	     int type, unsigned char *bytes, int len)

	{

	ASN1_OBJECT *obj;

	X509_NAME_ENTRY *nentry;

	obj=OBJ_nid2obj(nid);

	if (obj == NULL)

		{

		X509err(X509_F_X509_NAME_ENTRY_CREATE_BY_NID,X509_R_UNKNOWN_NID);

		return(NULL);

		}

	nentry = X509_NAME_ENTRY_create_by_OBJ(ne,obj,type,bytes,len);

	ASN1_OBJECT_free(obj);

	return nentry;

	}

EXPORT_C X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_OBJ(X509_NAME_ENTRY **ne,

	     ASN1_OBJECT *obj, int type, const unsigned char *bytes, int len)

	{

	X509_NAME_ENTRY *ret;

	if ((ne == NULL) || (*ne == NULL))

		{

		if ((ret=X509_NAME_ENTRY_new()) == NULL)

			return(NULL);

		}

	else

		ret= *ne;

	if (!X509_NAME_ENTRY_set_object(ret,obj))

		goto err;

	if (!X509_NAME_ENTRY_set_data(ret,type,bytes,len))

		goto err;

	if ((ne != NULL) && (*ne == NULL)) *ne=ret;

	return(ret);

err:

	if ((ne == NULL) || (ret != *ne))

		X509_NAME_ENTRY_free(ret);

	return(NULL);

	}

EXPORT_C int X509_NAME_ENTRY_set_object(X509_NAME_ENTRY *ne, ASN1_OBJECT *obj)

	{

	if ((ne == NULL) || (obj == NULL))

		{

		X509err(X509_F_X509_NAME_ENTRY_SET_OBJECT,ERR_R_PASSED_NULL_PARAMETER);

		return(0);

		}

	ASN1_OBJECT_free(ne->object);

	ne->object=OBJ_dup(obj);

	return((ne->object == NULL)?0:1);

	}

EXPORT_C int X509_NAME_ENTRY_set_data(X509_NAME_ENTRY *ne, int type,

	     const unsigned char *bytes, int len)

	{

	int i;

	if ((ne == NULL) || ((bytes == NULL) && (len != 0))) return(0);

	if((type > 0) && (type & MBSTRING_FLAG)) 

		return ASN1_STRING_set_by_NID(&ne->value, bytes,

						len, type,

					OBJ_obj2nid(ne->object)) ? 1 : 0;

	if (len < 0) len=strlen((char *)bytes);

	i=ASN1_STRING_set(ne->value,bytes,len);

	if (!i) return(0);

	if (type != V_ASN1_UNDEF)

		{

		if (type == V_ASN1_APP_CHOOSE)

			ne->value->type=ASN1_PRINTABLE_type(bytes,len);

		else

			ne->value->type=type;

		}

	return(1);

	}

EXPORT_C ASN1_OBJECT *X509_NAME_ENTRY_get_object(X509_NAME_ENTRY *ne)

	{

	if (ne == NULL) return(NULL);

	return(ne->object);

	}

EXPORT_C ASN1_STRING *X509_NAME_ENTRY_get_data(X509_NAME_ENTRY *ne)

	{

	if (ne == NULL) return(NULL);

	return(ne->value);

	}