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/*
* $Id: libnet-asn1.h,v 1.3 2004/01/17 07:51:19 mike Exp $
*
* libnet-asn1.h - Network routine library ASN.1 header file
*
* Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
* All rights reserved.
*
* 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.
*
* Copyright (c) 1998 - 2001 Mike D. Schiffman <mike@infonexus.com>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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.
*/
#ifndef __LIBNET_ASN1_H
#define __LIBNET_ASN1_H
#ifndef EIGHTBIT_SUBIDS
typedef u_int32_t oid;
#define MAX_SUBID 0xFFFFFFFF
#else
typedef u_int8_t oid;
#define MAX_SUBID 0xFF
#endif
#define MAX_OID_LEN 64 /* max subid's in an oid */
#define ASN_BOOLEAN (0x01)
#define ASN_INTEGER (0x02)
#define ASN_BIT_STR (0x03)
#define ASN_OCTET_STR (0x04)
#define ASN_NULL (0x05)
#define ASN_OBJECT_ID (0x06)
#define ASN_SEQUENCE (0x10)
#define ASN_SET (0x11)
#define ASN_UNIVERSAL (0x00)
#define ASN_APPLICATION (0x40)
#define ASN_CONTEXT (0x80)
#define ASN_PRIVATE (0xC0)
#define ASN_PRIMITIVE (0x00)
#define ASN_CONSTRUCTOR (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)
/*
* All of the build_asn1_* (build_asn1_length being an exception) functions
* take the same first 3 arguments:
*
* u_int8_t *data: This is a pointer to the start of the data object to be
* manipulated.
* int *datalen: This is a pointer to the number of valid bytes following
* "data". This should be not be exceeded in any function.
* Upon exiting a function, this value will reflect the
* changed "data" and then refer to the new number of valid
* bytes until the end of "data".
* u_int8_t type: The ASN.1 object type.
*/
/*
* Builds an ASN object containing an integer.
*
* Returns NULL upon error or a pointer to the first byte past the end of
* this object (the start of the next object).
*/
u_int8_t *
libnet_build_asn1_int(
u_int8_t *, /* Pointer to the output buffer */
int *, /* Number of valid bytes left in the buffer */
u_int8_t, /* ASN object type */
int32_t *, /* Pointer to a int32_t integer */
int /* Size of a int32_t integer */
);
/*
* Builds an ASN object containing an unsigned integer.
*
* Returns NULL upon error or a pointer to the first byte past the end of
* this object (the start of the next object).
*/
u_int8_t *
libnet_build_asn1_uint(
u_int8_t *, /* Pointer to the output buffer */
int *, /* Number of valid bytes left in the buffer */
u_int8_t, /* ASN object type */
u_int32_t *, /* Pointer to an unsigned int32_t integer */
int /* Size of a int32_t integer */
);
/*
* Builds an ASN object containing an octect string.
*
* Returns NULL upon error or a pointer to the first byte past the end of
* this object (the start of the next object).
*/
u_int8_t *
libnet_build_asn1_string(
u_int8_t *, /* Pointer to the output buffer */
int *, /* Number of valid bytes left in the buffer */
u_int8_t, /* ASN object type */
u_int8_t *, /* Pointer to a string to be built into an object */
int /* Size of the string */
);
/*
* Builds an ASN header for an object with the ID and length specified. This
* only works on data types < 30, i.e. no extension octets. The maximum
* length is 0xFFFF;
*
* Returns a pointer to the first byte of the contents of this object or
* NULL upon error
*/
u_int8_t *
libnet_build_asn1_header(
u_int8_t *, /* Pointer to the start of the object */
int *, /* Number of valid bytes left in buffer */
u_int8_t, /* ASN object type */
int /* ASN object length */
);
u_int8_t *
libnet_build_asn1_length(
u_int8_t *, /* Pointer to start of object */
int *, /* Number of valid bytes in buffer */
int /* Length of object */
);
/*
* Builds an ASN header for a sequence with the ID and length specified.
*
* This only works on data types < 30, i.e. no extension octets.
* The maximum length is 0xFFFF;
*
* Returns a pointer to the first byte of the contents of this object.
* Returns NULL on any error.
*/
u_int8_t *
libnet_build_asn1_sequence(
u_int8_t *,
int *,
u_int8_t,
int
);
/*
* Builds an ASN object identifier object containing the input string.
*
* Returns NULL upon error or a pointer to the first byte past the end of
* this object (the start of the next object).
*/
u_int8_t *
libnet_build_asn1_objid(
u_int8_t *,
int *,
u_int8_t,
oid *,
int
);
/*
* Builds an ASN null object.
*
* Returns NULL upon error or a pointer to the first byte past the end of
* this object (the start of the next object).
*/
u_int8_t *
libnet_build_asn1_null(
u_int8_t *,
int *,
u_int8_t
);
/*
* Builds an ASN bitstring.
*
* Returns NULL upon error or a pointer to the first byte past the end of
* this object (the start of the next object).
*/
u_int8_t *
libnet_build_asn1_bitstring(
u_int8_t *,
int *,
u_int8_t,
u_int8_t *, /* Pointer to the input buffer */
int /* Length of the input buffer */
);
#endif /* __LIBNET_ASN1_H */
/* EOF */