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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* lib/krb5/asn.1/asn1_get.h */
/*
* Copyright 1994 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*/
#ifndef __ASN1_GET_H__
#define __ASN1_GET_H__
/* ASN.1 substructure decoding procedures */
#include "k5-int.h"
#include "krbasn1.h"
#include "asn1buf.h"
typedef struct {
#if 1
/*
* Smaller run-time storage, and on x86 the compiler can use byte
* loads, stores, and compares, but on other platforms the compiler
* may need to load and widen before comparing... see how this works
* out.
*/
unsigned int asn1class : 8, construction : 8;
#else
asn1_class asn1class;
asn1_construction construction;
#endif
asn1_tagnum tagnum;
size_t length;
int indef;
/* When decoding, stores the leading and trailing lengths of a tag. Used
* by store_der(). */
size_t tag_len;
size_t tag_end_len;
} taginfo;
asn1_error_code asn1_get_tag_2 (asn1buf *buf, taginfo *tinfo);
#if 0
asn1_error_code asn1_get_tag_indef(asn1buf *buf,
asn1_class *Class,
asn1_construction *construction,
asn1_tagnum *tagnum,
unsigned int *retlen, int *indef);
asn1_error_code asn1_get_tag(asn1buf *buf,
asn1_class *Class,
asn1_construction *construction,
asn1_tagnum *tagnum,
unsigned int *retlen);
/*
* requires *buf is allocated
* effects Decodes the tag in *buf. If class != NULL, returns
* the class in *Class. Similarly, the construction,
* tag number, and length are returned in *construction,
* *tagnum, and *retlen, respectively.
*
* If *buf is empty to begin with, *tagnum is set to
* ASN1_TAGNUM_CEILING.
*
* Returns ASN1_OVERRUN if *buf is exhausted during the
* parse.
*/
#endif
asn1_error_code asn1_get_sequence(asn1buf *buf, unsigned int *retlen,
int *indef);
/*
* requires *buf is allocated
* effects Decodes a tag from *buf and returns ASN1_BAD_ID if it
* doesn't have a sequence ID. If retlen != NULL, the
* associated length is returned in *retlen.
*/
#endif
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