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//==========================================================================

//

//      ./lib/current/include/asn1.h

//

//

//==========================================================================

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// This file is part of eCos, the Embedded Configurable Operating System.   

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//####UCDSNMPCOPYRIGHTBEGIN####

//

// -------------------------------------------

//

// Portions of this software may have been derived from the UCD-SNMP

// project,  <http://ucd-snmp.ucdavis.edu/>  from the University of

// California at Davis, which was originally based on the Carnegie Mellon

// University SNMP implementation.  Portions of this software are therefore

// covered by the appropriate copyright disclaimers included herein.

//

// The release used was version 4.1.2 of May 2000.  "ucd-snmp-4.1.2"

// -------------------------------------------

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//####UCDSNMPCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    hmt

// Contributors: hmt

// Date:         2000-05-30

// Purpose:      Port of UCD-SNMP distribution to eCos.

// Description:  

//              

//

//####DESCRIPTIONEND####

//

//==========================================================================

/********************************************************************

       Copyright 1989, 1991, 1992 by Carnegie Mellon University

                          Derivative Work -

Copyright 1996, 1998, 1999, 2000 The Regents of the University of California

                         All Rights Reserved

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 appears in all copies and

that both that copyright notice and this permission notice appear in

supporting documentation, and that the name of CMU and The Regents of

the University of California not be used in advertising or publicity

pertaining to distribution of the software without specific written

permission.

CMU AND THE REGENTS OF THE UNIVERSITY OF CALIFORNIA DISCLAIM ALL

WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED

WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL CMU OR

THE REGENTS OF THE UNIVERSITY OF CALIFORNIA BE LIABLE FOR ANY SPECIAL,

INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING

FROM THE LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF

CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN

CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

*********************************************************************/

#ifndef ASN1_H

#define ASN1_H

#ifdef __cplusplus

extern "C" {

#endif

#define PARSE_PACKET    0

#define DUMP_PACKET     1

/*

 * Definitions for Abstract Syntax Notation One, ASN.1

 * As defined in ISO/IS 8824 and ISO/IS 8825

 *

 *

 */

/***********************************************************

        Copyright 1988, 1989 by Carnegie Mellon University

                      All Rights Reserved

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 CMU not be

used in advertising or publicity pertaining to distribution of the

software without specific, written prior permission.

CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING

ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL

CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR

ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,

WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,

ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS

SOFTWARE.

******************************************************************/

#ifndef EIGHTBIT_SUBIDS

typedef u_long  oid;

#define MAX_SUBID   0xFFFFFFFF

#else

typedef u_char  oid;

#define MAX_SUBID   0xFF

#endif

#define MIN_OID_LEN         2

#define MAX_OID_LEN         128 /* max subid's in an oid */

#ifndef MAX_NAME_LEN                      /* conflicts with some libraries */

#define MAX_NAME_LEN        MAX_OID_LEN   /* obsolete. use MAX_OID_LEN */

#endif

#define ASN_BOOLEAN         ((u_char)0x01)

#define ASN_INTEGER         ((u_char)0x02)

#define ASN_BIT_STR         ((u_char)0x03)

#define ASN_OCTET_STR       ((u_char)0x04)

#define ASN_NULL            ((u_char)0x05)

#define ASN_OBJECT_ID       ((u_char)0x06)

#define ASN_SEQUENCE        ((u_char)0x10)

#define ASN_SET             ((u_char)0x11)

#define ASN_UNIVERSAL       ((u_char)0x00)

#define ASN_APPLICATION     ((u_char)0x40)

#define ASN_CONTEXT         ((u_char)0x80)

#define ASN_PRIVATE         ((u_char)0xC0)

#define ASN_PRIMITIVE       ((u_char)0x00)

#define ASN_CONSTRUCTOR     ((u_char)0x20)

#define ASN_LONG_LEN        (0x80)

#define ASN_EXTENSION_ID    (0x1F)

#define ASN_BIT8            (0x80)

#define IS_CONSTRUCTOR(byte)    ((byte) & ASN_CONSTRUCTOR)

#define IS_EXTENSION_ID(byte)   (((byte) & ASN_EXTENSION_ID) == ASN_EXTENSION_ID)

struct counter64 {

    u_long high;

    u_long low;

};

#ifdef OPAQUE_SPECIAL_TYPES

typedef struct counter64 integer64;

typedef struct counter64 unsigned64;

/* The BER inside an OPAQUE is an context specific with a value of 48 (0x30)

   plus the "normal" tag. For a Counter64, the tag is 0x46 (i.e., an

   applications specific tag with value 6). So the value for a 64 bit

   counter is 0x46 + 0x30, or 0x76 (118 base 10). However, values

   greater than 30 can not be encoded in one octet. So the first octet

   has the class, in this case context specific (ASN_CONTEXT), and

   the special value (i.e., 31) to indicate that the real value follows

   in one or more octets. The high order bit of each following octet

   indicates if the value is encoded in additional octets. A high order

   bit of zero, indicates the last. For this "hack", only one octet

   will be used for the value. */

  /* first octet of the tag */

#define ASN_OPAQUE_TAG1 (ASN_CONTEXT | ASN_EXTENSION_ID)

/* base value for the second octet of the tag - the

   second octet was the value for the tag */

#define ASN_OPAQUE_TAG2 ((u_char)0x30) 

#define ASN_OPAQUE_TAG2U ((u_char)0x2f) /* second octet of tag for union */

/* All the ASN.1 types for SNMP "should have been" defined in this file,

   but they were not. (They are defined in snmp_impl.h)  Thus, the tag for

   Opaque and Counter64 is defined, again, here with a different names. */

#define ASN_APP_OPAQUE (ASN_APPLICATION | 4)

#define ASN_APP_COUNTER64 (ASN_APPLICATION | 6)

#define ASN_APP_FLOAT (ASN_APPLICATION | 8)

#define ASN_APP_DOUBLE (ASN_APPLICATION | 9)

#define ASN_APP_I64 (ASN_APPLICATION | 10)

#define ASN_APP_U64 (ASN_APPLICATION | 11)

#define ASN_APP_UNION (ASN_PRIVATE | 1)         /* or ASN_PRIV_UNION ? */

/* value for Counter64 */

#define ASN_OPAQUE_COUNTER64 (ASN_OPAQUE_TAG2 + ASN_APP_COUNTER64)

/* max size of BER encoding of Counter64 */

#define ASN_OPAQUE_COUNTER64_MX_BER_LEN 12  

/* value for Float */

#define ASN_OPAQUE_FLOAT (ASN_OPAQUE_TAG2 + ASN_APP_FLOAT)

/* size of BER encoding of Float */

#define ASN_OPAQUE_FLOAT_BER_LEN 7    

/* value for Double */

#define ASN_OPAQUE_DOUBLE (ASN_OPAQUE_TAG2 + ASN_APP_DOUBLE)

/* size of BER encoding of Double */

#define ASN_OPAQUE_DOUBLE_BER_LEN 11  

/* value for Integer64 */

#define ASN_OPAQUE_I64 (ASN_OPAQUE_TAG2 + ASN_APP_I64)

/* max size of BER encoding of Integer64 */

#define ASN_OPAQUE_I64_MX_BER_LEN 11

/* value for Unsigned64 */

#define ASN_OPAQUE_U64 (ASN_OPAQUE_TAG2 + ASN_APP_U64) 

/* max size of BER encoding of Unsigned64 */

#define ASN_OPAQUE_U64_MX_BER_LEN 12

#endif /* OPAQUE_SPECIAL_TYPES */

#define ASN_PRIV_INCL_RANGE (ASN_PRIVATE | 2)

#define ASN_PRIV_EXCL_RANGE (ASN_PRIVATE | 3)

#define ASN_PRIV_DELEGATED  (ASN_PRIVATE | 4)

#define IS_DELEGATED(x)   ((x) == ASN_PRIV_DELEGATED)

int      asn_check_packet (u_char *, size_t);

u_char  *asn_parse_int (u_char *, size_t *, u_char *, long *, size_t);

u_char  *asn_build_int (u_char *, size_t *, u_char, long *, size_t);

u_char  *asn_parse_unsigned_int (u_char *, size_t *, u_char *, u_long *, size_t);

u_char  *asn_build_unsigned_int (u_char *, size_t *, u_char, u_long *, size_t);

u_char  *asn_parse_string (u_char *, size_t *, u_char *, u_char *, size_t *);

u_char  *asn_build_string (u_char *, size_t *, u_char, const u_char *, size_t);

u_char  *asn_parse_header (u_char *, size_t *, u_char *);

u_char  *asn_parse_sequence(u_char *, size_t *, u_char *,

                 u_char expected_type,  /* must be this type */

                 const char *estr);     /* error message prefix */

u_char  *asn_build_header (u_char *, size_t *, u_char, size_t);

u_char  *asn_build_sequence (u_char *, size_t *, u_char, size_t);

u_char  *asn_parse_length (u_char *, u_long *);

u_char  *asn_build_length (u_char *, size_t *, size_t);

u_char  *asn_parse_objid (u_char *, size_t *, u_char *, oid *, size_t *);

u_char  *asn_build_objid (u_char *, size_t *, u_char, oid *, size_t);

u_char  *asn_parse_null (u_char *, size_t *, u_char *);

u_char  *asn_build_null (u_char *, size_t *, u_char);

u_char  *asn_parse_bitstring (u_char *, size_t *, u_char *, u_char *, size_t *);

u_char  *asn_build_bitstring (u_char *, size_t *, u_char, u_char *, size_t);

u_char  *asn_parse_unsigned_int64 (u_char *, size_t *, u_char *,

                                       struct counter64 *, size_t);

u_char  *asn_build_unsigned_int64 (u_char *, size_t *, u_char,

                                       struct counter64 *, size_t);

u_char  *asn_parse_signed_int64 (u_char *, size_t *, u_char *,

                                       struct counter64 *, size_t);

u_char  *asn_build_signed_int64 (u_char *, size_t *, u_char,

                                       struct counter64 *, size_t);

u_char  *asn_build_float (u_char *, size_t *, u_char, float *,

                              size_t);

u_char  *asn_parse_float (u_char *, size_t *, u_char *, float *, size_t);

u_char  *asn_build_double (u_char *, size_t *, u_char, double *,

                               size_t);

u_char  *asn_parse_double (u_char *, size_t *, u_char *, double *, size_t);

#ifdef __cplusplus

}

#endif

#endif /* ASN1_H */