/* crypto/x509/x509_att.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>

#include <openssl/x509v3.h>

EXPORT_C int X509at_get_attr_count(const STACK_OF(X509_ATTRIBUTE) *x)

{

	if (!x) return 0;

	return(sk_X509_ATTRIBUTE_num(x));

}

EXPORT_C int X509at_get_attr_by_NID(const STACK_OF(X509_ATTRIBUTE) *x, int nid,

			  int lastpos)

{

	ASN1_OBJECT *obj;

	obj=OBJ_nid2obj(nid);

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

	return(X509at_get_attr_by_OBJ(x,obj,lastpos));

}

EXPORT_C int X509at_get_attr_by_OBJ(const STACK_OF(X509_ATTRIBUTE) *sk, ASN1_OBJECT *obj,

			  int lastpos)

{

	int n;

	X509_ATTRIBUTE *ex;

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

	lastpos++;

	if (lastpos < 0)

		lastpos=0;

	n=sk_X509_ATTRIBUTE_num(sk);

	for ( ; lastpos < n; lastpos++)

		{

		ex=sk_X509_ATTRIBUTE_value(sk,lastpos);

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

			return(lastpos);

		}

	return(-1);

}

EXPORT_C X509_ATTRIBUTE *X509at_get_attr(const STACK_OF(X509_ATTRIBUTE) *x, int loc)

{

	if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)

		return NULL;

	else

		return sk_X509_ATTRIBUTE_value(x,loc);

}

EXPORT_C X509_ATTRIBUTE *X509at_delete_attr(STACK_OF(X509_ATTRIBUTE) *x, int loc)

{

	X509_ATTRIBUTE *ret;

	if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)

		return(NULL);

	ret=sk_X509_ATTRIBUTE_delete(x,loc);

	return(ret);

}

EXPORT_C STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr(STACK_OF(X509_ATTRIBUTE) **x,

					 X509_ATTRIBUTE *attr)

{

	X509_ATTRIBUTE *new_attr=NULL;

	STACK_OF(X509_ATTRIBUTE) *sk=NULL;

	if (x == NULL)

		{

		X509err(X509_F_X509AT_ADD1_ATTR, ERR_R_PASSED_NULL_PARAMETER);

		goto err2;

		} 

	if (*x == NULL)

		{

		if ((sk=sk_X509_ATTRIBUTE_new_null()) == NULL)

			goto err;

		}

	else

		sk= *x;

	if ((new_attr=X509_ATTRIBUTE_dup(attr)) == NULL)

		goto err2;

	if (!sk_X509_ATTRIBUTE_push(sk,new_attr))

		goto err;

	if (*x == NULL)

		*x=sk;

	return(sk);

err:

	X509err(X509_F_X509AT_ADD1_ATTR,ERR_R_MALLOC_FAILURE);

err2:

	if (new_attr != NULL) X509_ATTRIBUTE_free(new_attr);

	if (sk != NULL) sk_X509_ATTRIBUTE_free(sk);

	return(NULL);

}

EXPORT_C STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_OBJ(STACK_OF(X509_ATTRIBUTE) **x,

			const ASN1_OBJECT *obj, int type,

			const unsigned char *bytes, int len)

{

	X509_ATTRIBUTE *attr;

	STACK_OF(X509_ATTRIBUTE) *ret;

	attr = X509_ATTRIBUTE_create_by_OBJ(NULL, obj, type, bytes, len);

	if(!attr) return 0;

	ret = X509at_add1_attr(x, attr);

	X509_ATTRIBUTE_free(attr);

	return ret;

}

EXPORT_C STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_NID(STACK_OF(X509_ATTRIBUTE) **x,

			int nid, int type,

			const unsigned char *bytes, int len)

{

	X509_ATTRIBUTE *attr;

	STACK_OF(X509_ATTRIBUTE) *ret;

	attr = X509_ATTRIBUTE_create_by_NID(NULL, nid, type, bytes, len);

	if(!attr) return 0;

	ret = X509at_add1_attr(x, attr);

	X509_ATTRIBUTE_free(attr);

	return ret;

}

EXPORT_C STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_txt(STACK_OF(X509_ATTRIBUTE) **x,

			const char *attrname, int type,

			const unsigned char *bytes, int len)

{

	X509_ATTRIBUTE *attr;

	STACK_OF(X509_ATTRIBUTE) *ret;

	attr = X509_ATTRIBUTE_create_by_txt(NULL, attrname, type, bytes, len);

	if(!attr) return 0;

	ret = X509at_add1_attr(x, attr);

	X509_ATTRIBUTE_free(attr);

	return ret;

}

EXPORT_C X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_NID(X509_ATTRIBUTE **attr, int nid,

	     int atrtype, const void *data, int len)

{

	ASN1_OBJECT *obj;

	X509_ATTRIBUTE *ret;

	obj=OBJ_nid2obj(nid);

	if (obj == NULL)

		{

		X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_NID,X509_R_UNKNOWN_NID);

		return(NULL);

		}

	ret=X509_ATTRIBUTE_create_by_OBJ(attr,obj,atrtype,data,len);

	if (ret == NULL) ASN1_OBJECT_free(obj);

	return(ret);

}

EXPORT_C X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_OBJ(X509_ATTRIBUTE **attr,

	     const ASN1_OBJECT *obj, int atrtype, const void *data, int len)

{

	X509_ATTRIBUTE *ret;

	if ((attr == NULL) || (*attr == NULL))

		{

		if ((ret=X509_ATTRIBUTE_new()) == NULL)

			{

			X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_OBJ,ERR_R_MALLOC_FAILURE);

			return(NULL);

			}

		}

	else

		ret= *attr;

	if (!X509_ATTRIBUTE_set1_object(ret,obj))

		goto err;

	if (!X509_ATTRIBUTE_set1_data(ret,atrtype,data,len))

		goto err;

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

	return(ret);

err:

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

		X509_ATTRIBUTE_free(ret);

	return(NULL);

}

EXPORT_C X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_txt(X509_ATTRIBUTE **attr,

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

	{

	ASN1_OBJECT *obj;

	X509_ATTRIBUTE *nattr;

	obj=OBJ_txt2obj(atrname, 0);

	if (obj == NULL)

		{

		X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_TXT,

						X509_R_INVALID_FIELD_NAME);

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

		return(NULL);

		}

	nattr = X509_ATTRIBUTE_create_by_OBJ(attr,obj,type,bytes,len);

	ASN1_OBJECT_free(obj);

	return nattr;

	}

EXPORT_C int X509_ATTRIBUTE_set1_object(X509_ATTRIBUTE *attr, const ASN1_OBJECT *obj)

{

	if ((attr == NULL) || (obj == NULL))

		return(0);

	ASN1_OBJECT_free(attr->object);

	attr->object=OBJ_dup(obj);

	return(1);

}

EXPORT_C int X509_ATTRIBUTE_set1_data(X509_ATTRIBUTE *attr, int attrtype, const void *data, int len)

{

	ASN1_TYPE *ttmp;

	ASN1_STRING *stmp;

	int atype;

	if (!attr) return 0;

	if(attrtype & MBSTRING_FLAG) {

		stmp = ASN1_STRING_set_by_NID(NULL, data, len, attrtype,

						OBJ_obj2nid(attr->object));

		if(!stmp) {

			X509err(X509_F_X509_ATTRIBUTE_SET1_DATA, ERR_R_ASN1_LIB);

			return 0;

		}

		atype = stmp->type;

	} else {

		if(!(stmp = ASN1_STRING_type_new(attrtype))) goto err;

		if(!ASN1_STRING_set(stmp, data, len)) goto err;

		atype = attrtype;

	}

	if(!(attr->value.set = sk_ASN1_TYPE_new_null())) goto err;

	if(!(ttmp = ASN1_TYPE_new())) goto err;

	if(!sk_ASN1_TYPE_push(attr->value.set, ttmp)) goto err;

	attr->single = 0;

	ASN1_TYPE_set(ttmp, atype, stmp);

	return 1;

	err:

	X509err(X509_F_X509_ATTRIBUTE_SET1_DATA, ERR_R_MALLOC_FAILURE);

	return 0;

}

EXPORT_C int X509_ATTRIBUTE_count(X509_ATTRIBUTE *attr)

{

	if(!attr->single) return sk_ASN1_TYPE_num(attr->value.set);

	if(attr->value.single) return 1;

	return 0;

}

EXPORT_C ASN1_OBJECT *X509_ATTRIBUTE_get0_object(X509_ATTRIBUTE *attr)

{

	if (attr == NULL) return(NULL);

	return(attr->object);

}

EXPORT_C void *X509_ATTRIBUTE_get0_data(X509_ATTRIBUTE *attr, int idx,

					int atrtype, void *data)

{

	ASN1_TYPE *ttmp;

	ttmp = X509_ATTRIBUTE_get0_type(attr, idx);

	if(!ttmp) return NULL;

	if(atrtype != ASN1_TYPE_get(ttmp)){

		X509err(X509_F_X509_ATTRIBUTE_GET0_DATA, X509_R_WRONG_TYPE);

		return NULL;

	}

	return ttmp->value.ptr;

}

EXPORT_C ASN1_TYPE *X509_ATTRIBUTE_get0_type(X509_ATTRIBUTE *attr, int idx)

{

	if (attr == NULL) return(NULL);

	if(idx >= X509_ATTRIBUTE_count(attr)) return NULL;

	if(!attr->single) return sk_ASN1_TYPE_value(attr->value.set, idx);

	else return attr->value.single;

}