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396 lines
19 KiB
C++
Executable File
396 lines
19 KiB
C++
Executable File
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/***************************************************************************
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* EchoHeader.h -- The EchoHeader Class represents packets of the Nping *
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* Echo Protocol. It contains the appropriate methods to set/get all *
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* header fields. In general these methods do error checking and perform *
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* byte order conversions. *
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* *
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***********************IMPORTANT NMAP LICENSE TERMS************************
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* *
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* The Nmap Security Scanner is (C) 1996-2013 Insecure.Com LLC. Nmap is *
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* also a registered trademark of Insecure.Com LLC. This program is free *
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* software; you may redistribute and/or modify it under the terms of the *
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* GNU General Public License as published by the Free Software *
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* Foundation; Version 2 ("GPL"), BUT ONLY WITH ALL OF THE CLARIFICATIONS *
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* AND EXCEPTIONS DESCRIBED HEREIN. This guarantees your right to use, *
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* modify, and redistribute this software under certain conditions. If *
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* you wish to embed Nmap technology into proprietary software, we sell *
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* alternative licenses (contact sales@nmap.com). Dozens of software *
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* vendors already license Nmap technology such as host discovery, port *
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* scanning, OS detection, version detection, and the Nmap Scripting *
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* Engine. *
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* *
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* Note that the GPL places important restrictions on "derivative works", *
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* yet it does not provide a detailed definition of that term. To avoid *
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* misunderstandings, we interpret that term as broadly as copyright law *
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* allows. For example, we consider an application to constitute a *
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* derivative work for the purpose of this license if it does any of the *
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* following with any software or content covered by this license *
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* ("Covered Software"): *
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* *
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* o Integrates source code from Covered Software. *
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* *
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* o Reads or includes copyrighted data files, such as Nmap's nmap-os-db *
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* or nmap-service-probes. *
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* *
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* o Is designed specifically to execute Covered Software and parse the *
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* results (as opposed to typical shell or execution-menu apps, which will *
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* execute anything you tell them to). *
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* *
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* o Includes Covered Software in a proprietary executable installer. The *
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* installers produced by InstallShield are an example of this. Including *
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* Nmap with other software in compressed or archival form does not *
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* trigger this provision, provided appropriate open source decompression *
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* or de-archiving software is widely available for no charge. For the *
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* purposes of this license, an installer is considered to include Covered *
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* Software even if it actually retrieves a copy of Covered Software from *
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* another source during runtime (such as by downloading it from the *
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* Internet). *
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* *
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* o Links (statically or dynamically) to a library which does any of the *
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* above. *
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* *
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* o Executes a helper program, module, or script to do any of the above. *
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* *
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* This list is not exclusive, but is meant to clarify our interpretation *
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* of derived works with some common examples. Other people may interpret *
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* the plain GPL differently, so we consider this a special exception to *
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* the GPL that we apply to Covered Software. Works which meet any of *
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* these conditions must conform to all of the terms of this license, *
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* particularly including the GPL Section 3 requirements of providing *
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* source code and allowing free redistribution of the work as a whole. *
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* *
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* As another special exception to the GPL terms, Insecure.Com LLC grants *
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* permission to link the code of this program with any version of the *
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* OpenSSL library which is distributed under a license identical to that *
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* listed in the included docs/licenses/OpenSSL.txt file, and distribute *
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* linked combinations including the two. *
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* *
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* Any redistribution of Covered Software, including any derived works, *
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* must obey and carry forward all of the terms of this license, including *
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* obeying all GPL rules and restrictions. For example, source code of *
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* the whole work must be provided and free redistribution must be *
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* allowed. All GPL references to "this License", are to be treated as *
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* including the terms and conditions of this license text as well. *
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* *
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* Because this license imposes special exceptions to the GPL, Covered *
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* Work may not be combined (even as part of a larger work) with plain GPL *
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* software. The terms, conditions, and exceptions of this license must *
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* be included as well. This license is incompatible with some other open *
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* source licenses as well. In some cases we can relicense portions of *
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* Nmap or grant special permissions to use it in other open source *
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* software. Please contact fyodor@nmap.org with any such requests. *
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* Similarly, we don't incorporate incompatible open source software into *
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* Covered Software without special permission from the copyright holders. *
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* *
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* If you have any questions about the licensing restrictions on using *
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* Nmap in other works, are happy to help. As mentioned above, we also *
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* offer alternative license to integrate Nmap into proprietary *
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* applications and appliances. These contracts have been sold to dozens *
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* of software vendors, and generally include a perpetual license as well *
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* as providing for priority support and updates. They also fund the *
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* continued development of Nmap. Please email sales@nmap.com for further *
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* information. *
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* *
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* If you have received a written license agreement or contract for *
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* Covered Software stating terms other than these, you may choose to use *
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* and redistribute Covered Software under those terms instead of these. *
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* *
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* Source is provided to this software because we believe users have a *
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* right to know exactly what a program is going to do before they run it. *
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* This also allows you to audit the software for security holes (none *
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* have been found so far). *
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* *
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* Source code also allows you to port Nmap to new platforms, fix bugs, *
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* and add new features. You are highly encouraged to send your changes *
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* to the dev@nmap.org mailing list for possible incorporation into the *
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* main distribution. By sending these changes to Fyodor or one of the *
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* Insecure.Org development mailing lists, or checking them into the Nmap *
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* source code repository, it is understood (unless you specify otherwise) *
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* that you are offering the Nmap Project (Insecure.Com LLC) the *
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* unlimited, non-exclusive right to reuse, modify, and relicense the *
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* code. Nmap will always be available Open Source, but this is important *
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* because the inability to relicense code has caused devastating problems *
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* for other Free Software projects (such as KDE and NASM). We also *
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* occasionally relicense the code to third parties as discussed above. *
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* If you wish to specify special license conditions of your *
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* contributions, just say so when you send them. *
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* *
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* This program is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the Nmap *
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* license file for more details (it's in a COPYING file included with *
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* Nmap, and also available from https://svn.nmap.org/nmap/COPYING *
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* *
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***************************************************************************/
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#ifndef __ECHOHEADER_H__
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#define __ECHOHEADER_H__ 1
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#include "nping.h"
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#define ECHO_CURRENT_PROTO_VER 0x01
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/* Lengths */
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#define STD_NEP_HEADER_LEN 16 /* Common NEP header length */
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#define MAC_LENGTH 32 /* Length of message authentication codes */
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#define NONCE_LEN 32 /* Length of client/server nonces */
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#define PARTNER_IP_LEN 16 /* Length of Partner IP field */
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#define PACKETSPEC_FIELD_LEN 108 /* Length of the packet specification */
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#define ERROR_MSG_LEN 80 /* Length of NEP_ERROR message strings */
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#define NEP_HANDSHAKE_SERVER_LEN 96
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#define NEP_HANDSHAKE_CLIENT_LEN 144
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#define NEP_HANDSHAKE_FINAL_LEN 112
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#define NEP_PACKETSPEC_LEN 160
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#define NEP_READY_LEN 48
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#define NEP_ERROR_LEN 128
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#define ECHOED_PKT_HEADER_LEN 4 /* Length of {DLT Type, Packet Length} */
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#define MAX_ECHOED_PACKET_LEN 9212 /* Max length for echoed packets */
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#define MAX_DATA_LEN (ECHOED_PKT_HEADER_LEN + MAX_ECHOED_PACKET_LEN + MAC_LENGTH)
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#define NEP_ECHO_MIN_LEN 64
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#define NEP_ECHO_MAX_LEN ( STD_NEP_HEADER_LEN + MAX_DATA_LEN )
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#define MAX_NEP_PACKET_LENGTH ( STD_NEP_HEADER_LEN + MAX_DATA_LEN )
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/* Message types */
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#define TYPE_NEP_HANDSHAKE_SERVER 0x01
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#define TYPE_NEP_HANDSHAKE_CLIENT 0x02
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#define TYPE_NEP_HANDSHAKE_FINAL 0x03
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#define TYPE_NEP_PACKET_SPEC 0x04
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#define TYPE_NEP_READY 0x05
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#define TYPE_NEP_ECHO 0x06
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#define TYPE_NEP_ERROR 0x07
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/* Field specifiers */
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#define PSPEC_IPv4_TOS 0xA0
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#define PSPEC_IPv4_ID 0xA1
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#define PSPEC_IPv4_FRAGOFF 0xA2
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#define PSPEC_IPv4_PROTO 0xA3
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#define PSPEC_IPv6_TCLASS 0xB0
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#define PSPEC_IPv6_FLOW 0xB1
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#define PSPEC_IPv6_NHDR 0xB2
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#define PSPEC_TCP_SPORT 0xC0
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#define PSPEC_TCP_DPORT 0xC1
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#define PSPEC_TCP_SEQ 0xC2
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#define PSPEC_TCP_ACK 0xC3
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#define PSPEC_TCP_FLAGS 0xC4
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#define PSPEC_TCP_WIN 0xC5
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#define PSPEC_TCP_URP 0xC6
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#define PSPEC_ICMP_TYPE 0xD0
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#define PSPEC_ICMP_CODE 0xD1
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#define PSPEC_UDP_SPORT 0xE0
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#define PSPEC_UDP_DPORT 0xE1
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#define PSPEC_UDP_LEN 0xE2
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#define PSPEC_PAYLOAD_MAGIC 0xFF
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/* Protocol identifiers for NEP_PACKET_SPEC */
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#define PSPEC_PROTO_TCP 0x06
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#define PSPEC_PROTO_UDP 0x11
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#define PSPEC_PROTO_ICMP 0x01
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#define DLT_NODATALINKHEADERINCLUDED 0x0000
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/* GENERAL FORMAT:
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0 1 2 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Version | Message Type | Total Length |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Sequence Number |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Timestamp |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Reserved |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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. .
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. DATA .
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. .
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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. .
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. Message Authentication Code .
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. .
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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class EchoHeader : public ApplicationLayerElement {
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private:
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/* Common NEP packet header */
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struct nep_hdr{
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u8 echo_ver; /**< Protocol Version */
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u8 echo_mtype; /**< Message Type */
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u16 echo_tlen; /**< Total Length */
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u32 echo_seq; /**< Sequence Number */
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u32 echo_ts; /**< Timestamp */
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u32 echo_res; /**< Reserved */
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u8 data[MAX_DATA_LEN];
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}__attribute__((__packed__));
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typedef struct nep_hdr echohdr_t;
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/* NEP_HANDSHAKE_SERVER data */
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struct nep_hs_serv_data{
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u8 server_nonce[NONCE_LEN];
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u8 reserved[16];
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u8 mac[MAC_LENGTH];
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}__attribute__((__packed__));
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typedef struct nep_hs_serv_data nep_hs_serv_data_t;
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/* NEP_HANDSHAKE_CLIENT data */
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struct nep_hs_clnt_data{
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u8 server_nonce[NONCE_LEN];
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u8 client_nonce[NONCE_LEN];
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u8 partner_ip[PARTNER_IP_LEN];
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u8 ip_version;
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u8 reserved[15];
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u8 mac[MAC_LENGTH];
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}__attribute__((__packed__));
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typedef struct nep_hs_clnt_data nep_hs_clnt_data_t;
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/* NEP_HANDSHAKE_FINAL data */
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struct nep_hs_final_data{
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u8 client_nonce[NONCE_LEN];
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u8 partner_ip[PARTNER_IP_LEN];
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u8 ip_version;
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u8 reserved[15];
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u8 mac[MAC_LENGTH];
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}__attribute__((__packed__));
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typedef struct nep_hs_final_data nep_hs_final_data_t;
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/* NEP_PACKET_SPEC data */
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struct nep_packet_spec_data{
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u8 ip_version;
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u8 protocol;
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u16 packet_count;
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u8 packetspec[PACKETSPEC_FIELD_LEN];
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u8 mac[MAC_LENGTH];
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}__attribute__((__packed__));
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typedef struct nep_packet_spec_data nep_packet_spec_data_t;
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/* NEP_READY data */
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struct nep_ready_data{
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u8 mac[MAC_LENGTH];
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}__attribute__((__packed__));
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typedef struct nep_ready_data nep_ready_data_t;
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/* NEP_ECHO data */
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struct nep_echo_data{
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u16 dlt_type;
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u16 packet_len;
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u8 payload_and_mac[MAX_ECHOED_PACKET_LEN + MAC_LENGTH];
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}__attribute__((__packed__));
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typedef struct nep_echo_data nep_echo_data_t;
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/* NEP_ERROR data */
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struct nep_error_data{
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u8 errmsg[ERROR_MSG_LEN];
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u8 mac[MAC_LENGTH];
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}__attribute__((__packed__));
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typedef struct nep_error_data nep_error_data_t;
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/* Attributes */
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echohdr_t h;
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echohdr_t h_tmp;
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nep_hs_serv_data_t *data_hsserv;
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nep_hs_clnt_data_t *data_hsclnt;
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nep_hs_final_data_t *data_hsfinal;
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nep_packet_spec_data_t *data_pspec;
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nep_ready_data_t *data_ready;
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nep_echo_data_t *data_echo;
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u8 *echo_mac;
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int echo_bytes;
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nep_error_data_t *data_error;
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u8 *fs_off; /**< Current field spec offset */
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int fs_bytes; /**< Current field spec byte count */
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private:
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int getFieldLength(u8 field);
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public:
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EchoHeader();
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~EchoHeader();
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void reset();
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u8 *getBufferPointer();
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int storeRecvData(const u8 *buf, size_t len);
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int protocol_id() const;
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int setVersion(u8 val);
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u8 getVersion();
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int setMessageType(u8 val);
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u8 getMessageType();
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int setTotalLength(u16 val);
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int setTotalLength();
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u16 getTotalLength();
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int setSequenceNumber(u32 val);
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u32 getSequenceNumber();
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int setTimestamp(u32 val);
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int setTimestamp();
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u32 getTimestamp();
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int setReserved(u32 val);
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u32 getReserved();
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int setMessageAuthenticationCode(u8 *key, size_t keylen);
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u8 *getMessageAuthenticationCode();
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int verifyMessageAuthenticationCode(u8 *key, size_t keylen);
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int setServerNonce(u8 *nonce);
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u8 *getServerNonce();
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int setClientNonce(u8 *nonce);
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u8 *getClientNonce();
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int setPartnerAddress(struct in_addr val);
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int setPartnerAddress(struct in6_addr val);
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int getPartnerAddress(struct in_addr *dst);
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int getPartnerAddress(struct in6_addr *dst);
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int setIPVersion(u8 ver);
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u8 getIPVersion();
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int setProtocol(u8 proto);
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u8 getProtocol();
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int setPacketCount(u16 c);
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u16 getPacketCount();
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int addFieldSpec(u8 field, u8 *val);
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int addFieldSpec(u8 field, u8 *val, size_t flen);
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int getNextFieldSpec(u8 *field, u8 *dst_buff, size_t *final_len);
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int rewindFieldSpecCounters();
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int setDLT(u16 dlt);
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u16 getDLT();
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int setPacketLength(u16 len);
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u16 getPacketLength();
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int setEchoedPacket(const u8 *pkt, size_t pktlen);
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u8 *getEchoedPacket(u16 *final_len);
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u8 *getEchoedPacket();
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int updateEchoInternals();
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int setErrorMessage(const char *err);
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char *getErrorMessage();
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u8 *getCiphertextBounds(size_t *len);
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u8 *getCiphertextBounds(size_t *final_len, int message_type);
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u8 *encrypt(u8 *key, size_t key_len, u8 *iv);
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u8 *decrypt(u8 *key, size_t key_len, u8 *iv, int message_type);
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};
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#endif /* __ECHOHEADER_H__ */
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