libdsm/include/bdsm/smb_ntlm.h

//---------------------------------------------------------------------------
//  __________________    _________  _____            _____  .__         ._.
//  \______   \______ \  /   _____/ /     \          /  _  \ |__| ____   | |
//   |    |  _/|    |  \ \_____  \ /  \ /  \        /  /_\  \|  _/ __ \  | |
//   |    |   \|    `   \/        /    Y    \      /    |    |  \  ___/   \|
//   |______  /_______  /_______  \____|__  / /\   \____|__  |__|\___ |   __
//          \/        \/        \/        \/  )/           \/        \/   \/
//
// This file is part of libdsm. Copyright © 2014 VideoLabs SAS
//
// Author: Julien 'Lta' BALLET <contact@lta.io>
//
// This program is free software. It comes without any warranty, to the extent
// permitted by applicable law. You can redistribute it and/or modify it under
// the terms of the Do What The Fuck You Want To Public License, Version 2, as
// published by Sam Hocevar. See the COPYING file for more details.
//----------------------------------------------------------------------------

#ifndef __BDSM_SMB_NTLM_H_
#define __BDSM_SMB_NTLM_H_

#include "bdsm/smb_defs.h"

#define SMB_LM2_BLOB_SIZE         8
#define SMB_NTLM_HASH_SIZE        16

typedef uint8_t smb_ntlmh[SMB_NTLM_HASH_SIZE];

typedef struct
{
  uint32_t    header;
  uint32_t    reserved;
  uint64_t    timestamp;
  uint64_t    challenge;
  uint32_t    unknown;
  uint8_t     target[];
} __attribute__((packed)) smb_ntlm_blob;



#define SMB_NTLMSSP_CMD_NEGO      0x01
#define SMB_NTLMSSP_CMD_AUTH      0x03

#define _NTLMSSP_COMMON     \
  char        id[8];        \
  uint32_t    type;

#define _NTLMSSP_FIELD(FIELD)    \
  uint16_t  FIELD ## _len;       \
  uint16_t  FIELD ## _maxlen;    \
  uint32_t  FIELD ## _offset;

typedef struct
{
  _NTLMSSP_COMMON
  uint32_t    flags;
  _NTLMSSP_FIELD(domain)
  _NTLMSSP_FIELD(host)
  uint8_t     names[];
} __attribute__((packed)) smb_ntlmssp_nego;

typedef struct
{
  _NTLMSSP_COMMON
  _NTLMSSP_FIELD(name)
  uint32_t    flags;
  uint64_t    challenge;
  uint64_t    reserved;
  _NTLMSSP_FIELD(tgt) // Target Info
  uint8_t     data[];
} __attribute__((packed)) smb_ntlmssp_challenge;

typedef struct
{
  _NTLMSSP_COMMON
  _NTLMSSP_FIELD(lm)
  _NTLMSSP_FIELD(ntlm)
  _NTLMSSP_FIELD(domain)
  _NTLMSSP_FIELD(user)
  _NTLMSSP_FIELD(host)
  _NTLMSSP_FIELD(session_key)

  uint32_t    flags;
  uint8_t     data[];
} __attribute__((packed)) smb_ntlmssp_auth;

uint64_t    smb_ntlm_generate_challenge();
void        smb_ntlm_generate_xkey(smb_ntlmh *cli_session_key);
void        smb_ntlm_hash(const char *password, smb_ntlmh *hash);
void        smb_ntlm2_hash(const char *username, const char *password,
                           const char *destination, smb_ntlmh *hash);
// Precompute the blob that will be HMAC'ed to produce NTLM2 Response
// You have to free() the blob after usage
size_t      smb_ntlm_make_blob(smb_ntlm_blob **blob, uint64_t ts,
                               uint64_t user_challenge, void *tgt,
                               size_t tgt_sz);
// Returned response is blob_size + 16 long. You'll have to free it
uint8_t     *smb_ntlm2_response(smb_ntlmh *hash_v2, uint64_t srv_challenge,
                                uint8_t *blob, size_t blob_size);
// Returned response is 24 bytes long. You'll have to free it.
uint8_t     *smb_lm2_response(smb_ntlmh *hash_v2, uint64_t srv_challenge,
                              uint64_t user_challenge);
// You have to allocate session key
void        smb_ntlm2_session_key(smb_ntlmh *hash_v2, void *ntlm2,
                                  smb_ntlmh *xkey, smb_ntlmh *enc_xkey);

void        smb_ntlmssp_negotiate(const char *host, const char *domain,
                                  void **token, size_t *token_sz);
void        smb_ntlmssp_response(uint64_t srv_challenge, uint64_t srv_ts,
                                 const char *host, const char *domain,
                                 const char *user, const char *password,
                                 void *tgt, size_t tgt_sz,
                                 void **token, size_t *token_sz);

#endif