/* asn1t.h */

/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL

 * project 2000.

 */

/* ====================================================================

 * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.

 *

 * 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 above 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 acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"

 *

 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

 *    endorse or promote products derived from this software without

 *    prior written permission. For written permission, please contact

 *    licensing@OpenSSL.org.

 *

 * 5. Products derived from this software may not be called "OpenSSL"

 *    nor may "OpenSSL" appear in their names without prior written

 *    permission of the OpenSSL Project.

 *

 * 6. Redistributions of any form whatsoever must retain the following

 *    acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"

 *

 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

 * EXPRESSED 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 OpenSSL PROJECT OR

 * ITS 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.

 * ====================================================================

 *

 * This product includes cryptographic software written by Eric Young

 * (eay@cryptsoft.com).  This product includes software written by Tim

 * Hudson (tjh@cryptsoft.com).

 *

 */

#ifndef HEADER_ASN1T_H

#define HEADER_ASN1T_H

#include <stddef.h>

#include <openssl/e_os2.h>

#include <openssl/asn1.h>

#ifdef OPENSSL_BUILD_SHLIBCRYPTO

# undef OPENSSL_EXTERN

# define OPENSSL_EXTERN OPENSSL_EXPORT

#endif

/* ASN1 template defines, structures and functions */

#ifdef  __cplusplus

extern "C" {

#endif

#ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION

/* Macro to obtain ASN1_ADB pointer from a type (only used internally) */

#define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr))

/* Macros for start and end of ASN1_ITEM definition */

#define ASN1_ITEM_start(itname) \

	OPENSSL_GLOBAL const ASN1_ITEM itname##_it = {

#define ASN1_ITEM_end(itname) \

		};

#else

/* Macro to obtain ASN1_ADB pointer from a type (only used internally) */

#define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr()))

/* Macros for start and end of ASN1_ITEM definition */

#define ASN1_ITEM_start(itname) \

	const ASN1_ITEM * itname##_it(void) \

	{ \

		static const ASN1_ITEM local_it = { \

#define ASN1_ITEM_end(itname) \

		}; \

	return &local_it; \

	}

#endif

/* Macros to aid ASN1 template writing */

#define ASN1_ITEM_TEMPLATE(tname) \

	const static ASN1_TEMPLATE tname##_item_tt 

#define ASN1_ITEM_TEMPLATE_END(tname) \

	;\

	ASN1_ITEM_start(tname) \

		ASN1_ITYPE_PRIMITIVE,\

		-1,\

		&tname##_item_tt,\

		0,\

		NULL,\

		0,\

		#tname \

	ASN1_ITEM_end(tname)

/* This is a ASN1 type which just embeds a template */

/* This pair helps declare a SEQUENCE. We can do:

 *

 * 	ASN1_SEQUENCE(stname) = {

 * 		... SEQUENCE components ...

 * 	} ASN1_SEQUENCE_END(stname)

 *

 * 	This will produce an ASN1_ITEM called stname_it

 *	for a structure called stname.

 *

 * 	If you want the same structure but a different

 *	name then use:

 *

 * 	ASN1_SEQUENCE(itname) = {

 * 		... SEQUENCE components ...

 * 	} ASN1_SEQUENCE_END_name(stname, itname)

 *

 *	This will create an item called itname_it using

 *	a structure called stname.

 */

#define ASN1_SEQUENCE(tname) \

	const static ASN1_TEMPLATE tname##_seq_tt[] 

#define ASN1_SEQUENCE_END(stname) ASN1_SEQUENCE_END_name(stname, stname)

#define ASN1_SEQUENCE_END_name(stname, tname) \

	;\

	ASN1_ITEM_start(tname) \

		ASN1_ITYPE_SEQUENCE,\

		V_ASN1_SEQUENCE,\

		tname##_seq_tt,\

		sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\

		NULL,\

		sizeof(stname),\

		#stname \

	ASN1_ITEM_end(tname)

#define ASN1_SEQUENCE_cb(tname, cb) \

	const static ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \

	ASN1_SEQUENCE(tname)

#define ASN1_BROKEN_SEQUENCE(tname) \

	const static ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_BROKEN, 0, 0, 0, 0}; \

	ASN1_SEQUENCE(tname)

#define ASN1_SEQUENCE_ref(tname, cb, lck) \

	const static ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_REFCOUNT, offsetof(tname, references), lck, cb, 0}; \

	ASN1_SEQUENCE(tname)

#define ASN1_SEQUENCE_enc(tname, enc, cb) \

	const static ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_ENCODING, 0, 0, cb, offsetof(tname, enc)}; \

	ASN1_SEQUENCE(tname)

#define ASN1_BROKEN_SEQUENCE_END(stname) ASN1_SEQUENCE_END_ref(stname, stname)

#define ASN1_SEQUENCE_END_enc(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)

#define ASN1_SEQUENCE_END_cb(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)

#define ASN1_SEQUENCE_END_ref(stname, tname) \

	;\

	ASN1_ITEM_start(tname) \

		ASN1_ITYPE_SEQUENCE,\

		V_ASN1_SEQUENCE,\

		tname##_seq_tt,\

		sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\

		&tname##_aux,\

		sizeof(stname),\

		#stname \

	ASN1_ITEM_end(tname)

/* This pair helps declare a CHOICE type. We can do:

 *

 * 	ASN1_CHOICE(chname) = {

 * 		... CHOICE options ...

 * 	ASN1_CHOICE_END(chname)

 *

 * 	This will produce an ASN1_ITEM called chname_it

 *	for a structure called chname. The structure

 *	definition must look like this:

 *	typedef struct {

 *		int type;

 *		union {

 *			ASN1_SOMETHING *opt1;

 *			ASN1_SOMEOTHER *opt2;

 *		} value;

 *	} chname;

 *	

 *	the name of the selector must be 'type'.

 * 	to use an alternative selector name use the

 *      ASN1_CHOICE_END_selector() version.

 */

#define ASN1_CHOICE(tname) \

	const static ASN1_TEMPLATE tname##_ch_tt[] 

#define ASN1_CHOICE_cb(tname, cb) \

	const static ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \

	ASN1_CHOICE(tname)

#define ASN1_CHOICE_END(stname) ASN1_CHOICE_END_name(stname, stname)

#define ASN1_CHOICE_END_name(stname, tname) ASN1_CHOICE_END_selector(stname, tname, type)

#define ASN1_CHOICE_END_selector(stname, tname, selname) \

	;\

	ASN1_ITEM_start(tname) \

		ASN1_ITYPE_CHOICE,\

		offsetof(stname,selname) ,\

		tname##_ch_tt,\

		sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\

		NULL,\

		sizeof(stname),\

		#stname \

	ASN1_ITEM_end(tname)

#define ASN1_CHOICE_END_cb(stname, tname, selname) \

	;\

	ASN1_ITEM_start(tname) \

		ASN1_ITYPE_CHOICE,\

		offsetof(stname,selname) ,\

		tname##_ch_tt,\

		sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\

		&tname##_aux,\

		sizeof(stname),\

		#stname \

	ASN1_ITEM_end(tname)

/* This helps with the template wrapper form of ASN1_ITEM */

#define ASN1_EX_TEMPLATE_TYPE(flags, tag, name, type) { \

	(flags), (tag), 0,\

	#name, ASN1_ITEM_ref(type) }

/* These help with SEQUENCE or CHOICE components */

/* used to declare other types */

#define ASN1_EX_TYPE(flags, tag, stname, field, type) { \

	(flags), (tag), offsetof(stname, field),\

	#field, ASN1_ITEM_ref(type) }

/* used when the structure is combined with the parent */

#define ASN1_EX_COMBINE(flags, tag, type) { \

	(flags)|ASN1_TFLG_COMBINE, (tag), 0, NULL, ASN1_ITEM_ref(type) }

/* implicit and explicit helper macros */

#define ASN1_IMP_EX(stname, field, type, tag, ex) \

		ASN1_EX_TYPE(ASN1_TFLG_IMPLICIT | ex, tag, stname, field, type)

#define ASN1_EXP_EX(stname, field, type, tag, ex) \

		ASN1_EX_TYPE(ASN1_TFLG_EXPLICIT | ex, tag, stname, field, type)

/* Any defined by macros: the field used is in the table itself */

#ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION

#define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }

#define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }

#else

#define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, tblname##_adb }

#define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, tblname##_adb }

#endif

/* Plain simple type */

#define ASN1_SIMPLE(stname, field, type) ASN1_EX_TYPE(0,0, stname, field, type)

/* OPTIONAL simple type */

#define ASN1_OPT(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL, 0, stname, field, type)

/* IMPLICIT tagged simple type */

#define ASN1_IMP(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, 0)

/* IMPLICIT tagged OPTIONAL simple type */

#define ASN1_IMP_OPT(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)

/* Same as above but EXPLICIT */

#define ASN1_EXP(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, 0)

#define ASN1_EXP_OPT(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)

/* SEQUENCE OF type */

#define ASN1_SEQUENCE_OF(stname, field, type) \

		ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, stname, field, type)

/* OPTIONAL SEQUENCE OF */

#define ASN1_SEQUENCE_OF_OPT(stname, field, type) \

		ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)

/* Same as above but for SET OF */

#define ASN1_SET_OF(stname, field, type) \

		ASN1_EX_TYPE(ASN1_TFLG_SET_OF, 0, stname, field, type)

#define ASN1_SET_OF_OPT(stname, field, type) \

		ASN1_EX_TYPE(ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)

/* Finally compound types of SEQUENCE, SET, IMPLICIT, EXPLICIT and OPTIONAL */

#define ASN1_IMP_SET_OF(stname, field, type, tag) \

			ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)

#define ASN1_EXP_SET_OF(stname, field, type, tag) \

			ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)

#define ASN1_IMP_SET_OF_OPT(stname, field, type, tag) \

			ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)

#define ASN1_EXP_SET_OF_OPT(stname, field, type, tag) \

			ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)

#define ASN1_IMP_SEQUENCE_OF(stname, field, type, tag) \

			ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)

#define ASN1_IMP_SEQUENCE_OF_OPT(stname, field, type, tag) \

			ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)

#define ASN1_EXP_SEQUENCE_OF(stname, field, type, tag) \

			ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)

#define ASN1_EXP_SEQUENCE_OF_OPT(stname, field, type, tag) \

			ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)

/* Macros for the ASN1_ADB structure */

#define ASN1_ADB(name) \

	const static ASN1_ADB_TABLE name##_adbtbl[] 

#ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION

#define ASN1_ADB_END(name, flags, field, app_table, def, none) \

	;\

	const static ASN1_ADB name##_adb = {\

		flags,\

		offsetof(name, field),\

		app_table,\

		name##_adbtbl,\

		sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\

		def,\

		none\

	}

#else

#define ASN1_ADB_END(name, flags, field, app_table, def, none) \

	;\

	const static ASN1_ITEM *name##_adb(void) \

	{ \

	const static ASN1_ADB internal_adb = \

		{\

		flags,\

		offsetof(name, field),\

		app_table,\

		name##_adbtbl,\

		sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\

		def,\

		none\

		}; \

		return (const ASN1_ITEM *) &internal_adb; \

	} \

	void dummy_function(void)

#endif

#define ADB_ENTRY(val, template) {val, template}

#define ASN1_ADB_TEMPLATE(name) \

	const static ASN1_TEMPLATE name##_tt 

/* This is the ASN1 template structure that defines

 * a wrapper round the actual type. It determines the

 * actual position of the field in the value structure,

 * various flags such as OPTIONAL and the field name.

 */

struct ASN1_TEMPLATE_st {

unsigned long flags;		/* Various flags */

long tag;			/* tag, not used if no tagging */

unsigned long offset;		/* Offset of this field in structure */

#ifndef NO_ASN1_FIELD_NAMES

char *field_name;		/* Field name */

#endif

ASN1_ITEM_EXP *item;		/* Relevant ASN1_ITEM or ASN1_ADB */

};

/* Macro to extract ASN1_ITEM and ASN1_ADB pointer from ASN1_TEMPLATE */

#define ASN1_TEMPLATE_item(t) (t->item_ptr)

#define ASN1_TEMPLATE_adb(t) (t->item_ptr)

typedef struct ASN1_ADB_TABLE_st ASN1_ADB_TABLE;

typedef struct ASN1_ADB_st ASN1_ADB;

struct ASN1_ADB_st {

	unsigned long flags;	/* Various flags */

	unsigned long offset;	/* Offset of selector field */

	STACK_OF(ASN1_ADB_TABLE) **app_items; /* Application defined items */

	const ASN1_ADB_TABLE *tbl;	/* Table of possible types */

	long tblcount;		/* Number of entries in tbl */

	const ASN1_TEMPLATE *default_tt;  /* Type to use if no match */

	const ASN1_TEMPLATE *null_tt;  /* Type to use if selector is NULL */

};

struct ASN1_ADB_TABLE_st {

	long value;		/* NID for an object or value for an int */

	const ASN1_TEMPLATE tt;		/* item for this value */

};

/* template flags */

/* Field is optional */

#define ASN1_TFLG_OPTIONAL	(0x1)

/* Field is a SET OF */

#define ASN1_TFLG_SET_OF	(0x1 << 1)

/* Field is a SEQUENCE OF */

#define ASN1_TFLG_SEQUENCE_OF	(0x2 << 1)

/* Special case: this refers to a SET OF that

 * will be sorted into DER order when encoded *and*

 * the corresponding STACK will be modified to match

 * the new order.

 */

#define ASN1_TFLG_SET_ORDER	(0x3 << 1)

/* Mask for SET OF or SEQUENCE OF */

#define ASN1_TFLG_SK_MASK	(0x3 << 1)

/* These flags mean the tag should be taken from the

 * tag field. If EXPLICIT then the underlying type

 * is used for the inner tag.

 */

/* IMPLICIT tagging */

#define ASN1_TFLG_IMPTAG	(0x1 << 3)

/* EXPLICIT tagging, inner tag from underlying type */

#define ASN1_TFLG_EXPTAG	(0x2 << 3)

#define ASN1_TFLG_TAG_MASK	(0x3 << 3)

/* context specific IMPLICIT */

#define ASN1_TFLG_IMPLICIT	ASN1_TFLG_IMPTAG|ASN1_TFLG_CONTEXT

/* context specific EXPLICIT */

#define ASN1_TFLG_EXPLICIT	ASN1_TFLG_EXPTAG|ASN1_TFLG_CONTEXT

/* If tagging is in force these determine the

 * type of tag to use. Otherwise the tag is

 * determined by the underlying type. These 

 * values reflect the actual octet format.

 */

/* Universal tag */ 

#define ASN1_TFLG_UNIVERSAL	(0x0<<6)

/* Application tag */ 

#define ASN1_TFLG_APPLICATION	(0x1<<6)

/* Context specific tag */ 

#define ASN1_TFLG_CONTEXT	(0x2<<6)

/* Private tag */ 

#define ASN1_TFLG_PRIVATE	(0x3<<6)

#define ASN1_TFLG_TAG_CLASS	(0x3<<6)

/* These are for ANY DEFINED BY type. In this case

 * the 'item' field points to an ASN1_ADB structure

 * which contains a table of values to decode the

 * relevant type

 */

#define ASN1_TFLG_ADB_MASK	(0x3<<8)

#define ASN1_TFLG_ADB_OID	(0x1<<8)

#define ASN1_TFLG_ADB_INT	(0x1<<9)

/* This flag means a parent structure is passed

 * instead of the field: this is useful is a

 * SEQUENCE is being combined with a CHOICE for

 * example. Since this means the structure and

 * item name will differ we need to use the

 * ASN1_CHOICE_END_name() macro for example.

 */

#define ASN1_TFLG_COMBINE	(0x1<<10)

/* This is the actual ASN1 item itself */

struct ASN1_ITEM_st {

char itype;			/* The item type, primitive, SEQUENCE, CHOICE or extern */

long utype;			/* underlying type */

const ASN1_TEMPLATE *templates;	/* If SEQUENCE or CHOICE this contains the contents */

long tcount;			/* Number of templates if SEQUENCE or CHOICE */

const void *funcs;		/* functions that handle this type */