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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 */