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Diffstat (limited to 'libnet/include/libnet/libnet-asn1.h')
| -rw-r--r-- | libnet/include/libnet/libnet-asn1.h | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/libnet/include/libnet/libnet-asn1.h b/libnet/include/libnet/libnet-asn1.h new file mode 100644 index 0000000..ea27356 --- /dev/null +++ b/libnet/include/libnet/libnet-asn1.h @@ -0,0 +1,255 @@ +/* + * $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 */ |