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/***************************************************************************
* opensshlib.h -- header file containing generic structure that is being *
* passed along all hooked OpenSSH functions to track Ncrack state for the *
* SSH module. *
* *
***********************IMPORTANT NMAP LICENSE TERMS************************
* *
* The Nmap Security Scanner is (C) 1996-2017 Insecure.Com LLC ("The Nmap *
* Project"). Nmap is also a registered trademark of the Nmap Project. *
* This program is free software; you may redistribute and/or modify it *
* under the terms of the GNU General Public License as published by the *
* Free Software Foundation; Version 2 ("GPL"), BUT ONLY WITH ALL OF THE *
* CLARIFICATIONS AND EXCEPTIONS DESCRIBED HEREIN. This guarantees your *
* right to use, modify, and redistribute this software under certain *
* conditions. If you wish to embed Nmap technology into proprietary *
* software, we sell alternative licenses (contact sales@nmap.com). *
* Dozens of software vendors already license Nmap technology such as *
* host discovery, port scanning, OS detection, version detection, and *
* the Nmap Scripting Engine. *
* *
* Note that the GPL places important restrictions on "derivative works", *
* yet it does not provide a detailed definition of that term. To avoid *
* misunderstandings, we interpret that term as broadly as copyright law *
* allows. For example, we consider an application to constitute a *
* derivative work for the purpose of this license if it does any of the *
* following with any software or content covered by this license *
* ("Covered Software"): *
* *
* o Integrates source code from Covered Software. *
* *
* o Reads or includes copyrighted data files, such as Nmap's nmap-os-db *
* or nmap-service-probes. *
* *
* o Is designed specifically to execute Covered Software and parse the *
* results (as opposed to typical shell or execution-menu apps, which will *
* execute anything you tell them to). *
* *
* o Includes Covered Software in a proprietary executable installer. The *
* installers produced by InstallShield are an example of this. Including *
* Nmap with other software in compressed or archival form does not *
* trigger this provision, provided appropriate open source decompression *
* or de-archiving software is widely available for no charge. For the *
* purposes of this license, an installer is considered to include Covered *
* Software even if it actually retrieves a copy of Covered Software from *
* another source during runtime (such as by downloading it from the *
* Internet). *
* *
* o Links (statically or dynamically) to a library which does any of the *
* above. *
* *
* o Executes a helper program, module, or script to do any of the above. *
* *
* This list is not exclusive, but is meant to clarify our interpretation *
* of derived works with some common examples. Other people may interpret *
* the plain GPL differently, so we consider this a special exception to *
* the GPL that we apply to Covered Software. Works which meet any of *
* these conditions must conform to all of the terms of this license, *
* particularly including the GPL Section 3 requirements of providing *
* source code and allowing free redistribution of the work as a whole. *
* *
* As another special exception to the GPL terms, the Nmap Project grants *
* permission to link the code of this program with any version of the *
* OpenSSL library which is distributed under a license identical to that *
* listed in the included docs/licenses/OpenSSL.txt file, and distribute *
* linked combinations including the two. *
* *
* The Nmap Project has permission to redistribute Npcap, a packet *
* capturing driver and library for the Microsoft Windows platform. *
* Npcap is a separate work with it's own license rather than this Nmap *
* license. Since the Npcap license does not permit redistribution *
* without special permission, our Nmap Windows binary packages which *
* contain Npcap may not be redistributed without special permission. *
* *
* Any redistribution of Covered Software, including any derived works, *
* must obey and carry forward all of the terms of this license, including *
* obeying all GPL rules and restrictions. For example, source code of *
* the whole work must be provided and free redistribution must be *
* allowed. All GPL references to "this License", are to be treated as *
* including the terms and conditions of this license text as well. *
* *
* Because this license imposes special exceptions to the GPL, Covered *
* Work may not be combined (even as part of a larger work) with plain GPL *
* software. The terms, conditions, and exceptions of this license must *
* be included as well. This license is incompatible with some other open *
* source licenses as well. In some cases we can relicense portions of *
* Nmap or grant special permissions to use it in other open source *
* software. Please contact fyodor@nmap.org with any such requests. *
* Similarly, we don't incorporate incompatible open source software into *
* Covered Software without special permission from the copyright holders. *
* *
* If you have any questions about the licensing restrictions on using *
* Nmap in other works, are happy to help. As mentioned above, we also *
* offer alternative license to integrate Nmap into proprietary *
* applications and appliances. These contracts have been sold to dozens *
* of software vendors, and generally include a perpetual license as well *
* as providing for priority support and updates. They also fund the *
* continued development of Nmap. Please email sales@nmap.com for further *
* information. *
* *
* If you have received a written license agreement or contract for *
* Covered Software stating terms other than these, you may choose to use *
* and redistribute Covered Software under those terms instead of these. *
* *
* Source is provided to this software because we believe users have a *
* right to know exactly what a program is going to do before they run it. *
* This also allows you to audit the software for security holes. *
* *
* Source code also allows you to port Nmap to new platforms, fix bugs, *
* and add new features. You are highly encouraged to send your changes *
* to the dev@nmap.org mailing list for possible incorporation into the *
* main distribution. By sending these changes to Fyodor or one of the *
* Insecure.Org development mailing lists, or checking them into the Nmap *
* source code repository, it is understood (unless you specify *
* otherwise) that you are offering the Nmap Project the unlimited, *
* non-exclusive right to reuse, modify, and relicense the code. Nmap *
* will always be available Open Source, but this is important because *
* the inability to relicense code has caused devastating problems for *
* other Free Software projects (such as KDE and NASM). We also *
* occasionally relicense the code to third parties as discussed above. *
* If you wish to specify special license conditions of your *
* contributions, just say so when you send them. *
* *
* This program is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the Nmap *
* license file for more details (it's in a COPYING file included with *
* Nmap, and also available from https://svn.nmap.org/nmap/COPYING) *
* *
***************************************************************************/
#ifndef OPENSSHLIB_H
#define OPENSSHLIB_H
#include "buffer.h"
#include "sshbuf.h"
#include "cipher.h"
#include "ssh1.h"
#ifdef __cplusplus
extern "C" {
#endif
struct kex;
struct newkeys;
typedef struct packet_state {
u_int32_t seqnr;
u_int32_t packets;
u_int64_t blocks;
u_int64_t bytes;
} packet_state;
/*
* Every module invocation has its own Ncrack_state struct which holds every
* bit of information needed to keep track of things. Most of the variables
* found inside this object were usually static/global variables in the original
* OpenSSH codebase.
*/
typedef struct ncrack_ssh_state {
struct kex *kex;
DH *dh;
/* Session key information for Encryption and MAC */
struct newkeys *newkeys[2];
struct newkeys *current_keys[2];
char *client_version_string;
char *server_version_string;
/* Encryption context for receiving data. This is only used for decryption. */
struct sshcipher_ctx receive_context;
/* Encryption context for sending data. This is only used for encryption. */
struct sshcipher_ctx send_context;
/* ***** IO Buffers ****** */
//Buffer ncrack_buf;
/* Buffer for raw input data from the socket. */
struct sshbuf *input;
/* Buffer for raw output data going to the socket. */
struct sshbuf *output;
/* Buffer for the incoming packet currently being processed. */
struct sshbuf *incoming_packet;
/* Buffer for the partial outgoing packet being constructed. */
struct sshbuf *outgoing_packet;
u_int64_t max_blocks_in;
u_int64_t max_blocks_out;
packet_state p_read;
packet_state p_send;
/* Used in packet_read_poll2() */
u_int packlen;
int compat20; /* boolean -> true if SSHv2 compatible */
/* Compatibility mode for different bugs of various older sshd
* versions. It holds a list of these bug types in a binary OR list
*/
int datafellows;
int compat;
int type; /* type of packet returned */
u_char extra_pad; /* extra padding that might be needed */
/*
* Reason that this connection was ended. It might be that we got a
* disconnnect packet from the server due to many authentication attempts
* or some other exotic reason.
*/
char *disc_reason;
u_int packet_length; // TODO check this
int rekeying;
u_int32_t rekey_limit;
u_int32_t rekey_interval;
time_t rekey_time;
int cipher_warning_done;
int keep_alive_timeouts;
int dispatch_skip_packets;
u_int packet_discard;
struct sshmac *packet_discard_mac;
char *prev_user;
} ncrack_ssh_state;
#ifdef __cplusplus
} /* End of 'extern "C"' */
#endif
#endif
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