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248 lines
12 KiB
C++
248 lines
12 KiB
C++
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/***************************************************************************
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* NEPContext.cc -- *
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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) 1996-2012 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 with the clarifications and exceptions described *
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* below. This guarantees your right to use, modify, and redistribute *
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* this software under certain conditions. If you wish to embed Nmap *
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* technology into proprietary software, we sell alternative licenses *
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* (contact sales@insecure.com). Dozens of software vendors already *
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* license Nmap technology such as host discovery, port scanning, OS *
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* detection, version detection, and the Nmap Scripting Engine. *
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* *
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* Note that the GPL places important restrictions on "derived works", yet *
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* 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: *
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* o Integrates source code from Nmap *
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* o Reads or includes Nmap copyrighted data files, such as *
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* nmap-os-db or nmap-service-probes. *
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* o Executes Nmap and parses the results (as opposed to typical shell or *
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* execution-menu apps, which simply display raw Nmap output and so are *
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* not derivative works.) *
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* o Integrates/includes/aggregates Nmap into a proprietary executable *
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* installer, such as those produced by InstallShield. *
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* o Links to a library or executes a program that does any of the above *
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* *
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* The term "Nmap" should be taken to also include any portions or derived *
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* works of Nmap, as well as other software we distribute under this *
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* license such as Zenmap, Ncat, and Nping. This list is not exclusive, *
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* but is meant to clarify our interpretation of derived works with some *
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* common examples. Our interpretation applies only to Nmap--we don't *
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* speak for other people's GPL works. *
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* *
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* If you have any questions about the GPL licensing restrictions on using *
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* Nmap in non-GPL works, we would be happy to help. As mentioned above, *
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* we also 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@insecure.com for *
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* further information. *
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* *
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* As a 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. You must obey the GNU GPL in all *
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* respects for all of the code used other than OpenSSL. If you modify *
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* this file, you may extend this exception to your version of the file, *
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* but you are not obligated to do so. *
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* *
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* If you received these files with a written license agreement or *
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* contract stating terms other than the terms above, then that *
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* alternative license agreement takes precedence over these comments. *
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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 nmap-dev@insecure.org for possible incorporation into the main *
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* 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 GNU *
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* General Public License v2.0 for more details at *
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* http://www.gnu.org/licenses/gpl-2.0.html , or in the COPYING file *
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* included with Nmap. *
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* *
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***************************************************************************/
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#ifndef __NEPCONTEXT_H__
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#define __NEPCONTEXT_H__ 1
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#include "nsock.h"
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#include "EchoHeader.h"
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#include <vector>
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using namespace std;
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/* SERVER STATE MACHINE */
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/* _ */
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/* (O) */
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/* | */
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/* Capture Raw / | Rcvd TCP Connection / */
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/* Send NEP_ECHO | +--------+ Send NEP_HANDSHAKE_SERVER */
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/* +----------+ +---->| LISTEN |-----------------+ */
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/* | | +--------+ | */
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/* | \|/ \|/ */
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/* | +----+------+ +----------+-----------+ */
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/* +-----| NEP_READY | | NEP_HANDSHAKE_SERVER | */
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/* | SENT | | SENT | */
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/* +----+------+ +----------+-----------+ */
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/* /|\ | */
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/* | | */
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/* | +---------------------+ | */
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/* | | NEP_HANDSHAKE_FINAL | | */
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/* +-------| SENT |<---------+ */
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/* +---------------------+ Rcvd NEP_HANDSHAKE_CLIENT/ */
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/* Rcvd NEP_PACKETSPEC / Send NEP_HANDSHAKE_FINAL */
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/* Send NEP_READY */
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/* */
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/* */
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#define STATE_LISTEN 0x00
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#define STATE_HS_SERVER_SENT 0x01
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#define STATE_HS_FINAL_SENT 0x02
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#define STATE_READY_SENT 0x03
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#define CLIENT_NOT_FOUND -1
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typedef int clientid_t; /**< Type for client identifiers */
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#define MAC_KEY_S2C_INITIAL 0x01
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#define MAC_KEY_S2C 0x02
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#define MAC_KEY_C2S 0x03
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#define CIPHER_KEY_C2S 0x04
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#define CIPHER_KEY_S2C 0x05
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/* Client field specifier */
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typedef struct field_spec{
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u8 field; /* Field identifier (See NEP RFC) */
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u8 len; /* Field length */
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u8 value[PACKETSPEC_FIELD_LEN]; /* Field data */
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}fspec_t;
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class NEPContext {
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private:
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clientid_t id; /**< Client identifier */
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nsock_iod nsi; /**< Client nsock IOD */
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int state;
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u32 last_seq_client;
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u32 last_seq_server;
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u8 next_iv_enc[CIPHER_BLOCK_SIZE];
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u8 next_iv_dec[CIPHER_BLOCK_SIZE];
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u8 nep_key_mac_c2s[MAC_KEY_LEN];
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u8 nep_key_mac_s2c[MAC_KEY_LEN];
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u8 nep_key_ciphertext_c2s[CIPHER_KEY_LEN];
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u8 nep_key_ciphertext_s2c[CIPHER_KEY_LEN];
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u8 server_nonce[NONCE_LEN];
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u8 client_nonce[NONCE_LEN];
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bool server_nonce_set;
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bool client_nonce_set;
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vector<fspec_t> fspecs;
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struct sockaddr_storage clnt_addr;
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u8 *generateKey(int key_type, size_t *final_len);
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public:
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NEPContext();
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~NEPContext();
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void reset();
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int setIdentifier(clientid_t clnt);
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clientid_t getIdentifier();
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int setAddress(struct sockaddr_storage a);
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struct sockaddr_storage getAddress();
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int setNsockIOD(nsock_iod iod);
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nsock_iod getNsockIOD();
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int setState(int state);
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int getState();
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bool ready();
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int setNextEncryptionIV(u8 *block);
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u8 *getNextEncryptionIV(size_t *final_len);
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u8 *getNextEncryptionIV();
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int setNextDecryptionIV(u8 *block);
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u8 *getNextDecryptionIV(size_t *final_len);
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u8 *getNextDecryptionIV();
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int setLastServerSequence(u32 seq);
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u32 getLastServerSequence();
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u32 getNextServerSequence();
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int setLastClientSequence(u32 seq);
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u32 getLastClientSequence();
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u32 getNextClientSequence();
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int generateInitialServerSequence();
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int generateInitialClientSequence();
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int setMacKeyC2S(u8 *key);
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u8 *getMacKeyC2S();
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u8 *getMacKeyC2S(size_t *final_len);
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int generateMacKeyC2S();
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int setMacKeyS2C(u8 *key);
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u8 *getMacKeyS2C();
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u8 *getMacKeyS2C(size_t *final_len);
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int generateMacKeyS2C();
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int setCipherKeyC2S(u8 *key);
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u8 *getCipherKeyC2S();
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u8 *getCipherKeyC2S(size_t *final_len);
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int generateCipherKeyC2S();
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int generateMacKeyS2CInitial();
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int setCipherKeyS2C(u8 *key);
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u8 *getCipherKeyS2C();
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u8 *getCipherKeyS2C(size_t *final_len);
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int generateCipherKeyS2C();
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int generateClientNonce();
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int generateServerNonce();
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int setClientNonce(u8 *buff);
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u8 *getClientNonce();
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int setServerNonce(u8 *buff);
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u8 *getServerNonce();
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int addClientFieldSpec(u8 field, u8 len, u8 *value);
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fspec_t *getClientFieldSpec(int index);
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bool isDuplicateFieldSpec(u8 test_field);
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int resetClientFieldSpecs();
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};
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#endif /* __NEPCONTEXT_H__ */
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