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/*
Unix SMB/CIFS implementation.
SMB parameters and setup
Copyright (C) Andrew Tridgell 1992-1997
Copyright (C) Luke Kenneth Casson Leighton 1996-1997
Copyright (C) Paul Ashton 1997
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
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
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* NTLMSSP mode */
enum ntlmssp_role
{
NTLMSSP_SERVER,
NTLMSSP_CLIENT
};
/* NTLMSSP message types */
enum ntlmssp_message_type
{
NTLMSSP_INITIAL = 0 /* samba internal state */,
NTLMSSP_NEGOTIATE = 1,
NTLMSSP_CHALLENGE = 2,
NTLMSSP_AUTH = 3,
NTLMSSP_UNKNOWN = 4,
NTLMSSP_DONE = 5 /* samba final state */
};
#define NTLMSSP_FEATURE_SESSION_KEY 0x00000001
#define NTLMSSP_FEATURE_SIGN 0x00000002
#define NTLMSSP_FEATURE_SEAL 0x00000004
#define NTLMSSP_FEATURE_CCACHE 0x00000008
struct ntlmssp_state
{
enum ntlmssp_role role;
enum server_types server_role;
uint32_t expected_state;
bool unicode;
bool use_ntlmv2;
bool use_ccache;
char *user;
char *domain;
char *workstation;
unsigned char *nt_hash;
unsigned char *lm_hash;
char *server_domain;
DATA_BLOB internal_chal; /* Random challenge as supplied to the client for NTLM authentication */
DATA_BLOB chal; /* Random challenge as input into the actual NTLM (or NTLM2) authentication */
DATA_BLOB lm_resp;
DATA_BLOB nt_resp;
DATA_BLOB session_key;
uint32_t neg_flags; /* the current state of negotiation with the NTLMSSP partner */
void *auth_context;
/**
* Callback to get the 'challenge' used for NTLM authentication.
*
* @param ntlmssp_state This structure
* @return 8 bytes of challenge data, determined by the server to be the challenge for NTLM authentication
*
*/
NTSTATUS (*get_challenge)(const struct ntlmssp_state *ntlmssp_state,
uint8_t challenge[8]);
/**
* Callback to find if the challenge used by NTLM authentication may be modified
*
* The NTLM2 authentication scheme modifies the effective challenge, but this is not compatiable with the
* current 'security=server' implementation..
*
* @param ntlmssp_state This structure
* @return Can the challenge be set to arbitary values?
*
*/
bool (*may_set_challenge)(const struct ntlmssp_state *ntlmssp_state);
/**
* Callback to set the 'challenge' used for NTLM authentication.
*
* The callback may use the void *auth_context to store state information, but the same value is always available
* from the DATA_BLOB chal on this structure.
*
* @param ntlmssp_state This structure
* @param challenge 8 bytes of data, agreed by the client and server to be the effective challenge for NTLM2 authentication
*
*/
NTSTATUS (*set_challenge)(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *challenge);
/**
* Callback to check the user's password.
*
* The callback must reads the feilds of this structure for the information it needs on the user
* @param ntlmssp_state This structure
* @param nt_session_key If an NT session key is returned by the authentication process, return it here
* @param lm_session_key If an LM session key is returned by the authentication process, return it here
*
*/
NTSTATUS (*check_password)(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *nt_session_key, DATA_BLOB *lm_session_key);
const char *(*get_global_myname)(void);
const char *(*get_domain)(void);
/* ntlmv2 */
unsigned char send_sign_key[16];
unsigned char send_seal_key[16];
unsigned char recv_sign_key[16];
unsigned char recv_seal_key[16];
struct arcfour_state send_seal_arc4_state;
struct arcfour_state recv_seal_arc4_state;
uint32_t ntlm2_send_seq_num;
uint32_t ntlm2_recv_seq_num;
/* ntlmv1 */
struct arcfour_state ntlmv1_arc4_state;
uint32_t ntlmv1_seq_num;
};
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