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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/>.
*/
#include "librpc/gen_ndr/samr.h"
/* 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 */
};
/* NTLMSSP negotiation flags */
#define NTLMSSP_NEGOTIATE_UNICODE 0x00000001
#define NTLMSSP_NEGOTIATE_OEM 0x00000002
#define NTLMSSP_REQUEST_TARGET 0x00000004
#define NTLMSSP_NEGOTIATE_SIGN 0x00000010 /* Message integrity */
#define NTLMSSP_NEGOTIATE_SEAL 0x00000020 /* Message confidentiality */
#define NTLMSSP_NEGOTIATE_DATAGRAM_STYLE 0x00000040
#define NTLMSSP_NEGOTIATE_LM_KEY 0x00000080
#define NTLMSSP_NEGOTIATE_NETWARE 0x00000100
#define NTLMSSP_NEGOTIATE_NTLM 0x00000200
#define NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED 0x00001000
#define NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED 0x00002000
#define NTLMSSP_NEGOTIATE_THIS_IS_LOCAL_CALL 0x00004000
#define NTLMSSP_NEGOTIATE_ALWAYS_SIGN 0x00008000
#define NTLMSSP_TARGET_TYPE_DOMAIN 0x10000
#define NTLMSSP_TARGET_TYPE_SERVER 0x20000
#define NTLMSSP_CHAL_INIT_RESPONSE 0x00010000
#define NTLMSSP_CHAL_ACCEPT_RESPONSE 0x00020000
#define NTLMSSP_CHAL_NON_NT_SESSION_KEY 0x00040000
#define NTLMSSP_NEGOTIATE_NTLM2 0x00080000
#define NTLMSSP_CHAL_TARGET_INFO 0x00800000
#define NTLMSSP_UNKNOWN_02000000 0x02000000
#define NTLMSSP_NEGOTIATE_128 0x20000000 /* 128-bit encryption */
#define NTLMSSP_NEGOTIATE_KEY_EXCH 0x40000000
#define NTLMSSP_NEGOTIATE_56 0x80000000
#define NTLMSSP_NAME_TYPE_SERVER 0x01
#define NTLMSSP_NAME_TYPE_DOMAIN 0x02
#define NTLMSSP_NAME_TYPE_SERVER_DNS 0x03
#define NTLMSSP_NAME_TYPE_DOMAIN_DNS 0x04
#define NTLMSSP_SIGN_VERSION 1
#define NTLMSSP_SIG_SIZE 16
struct gensec_ntlmssp_state
{
struct gensec_security *gensec_security;
enum ntlmssp_role role;
enum samr_Role server_role;
uint32_t expected_state;
bool unicode;
bool use_ntlmv2;
bool use_nt_response; /* Set to 'False' to debug what happens when the NT response is omited */
bool allow_lm_key; /* The LM_KEY code is not functional at this point, and it's not
very secure anyway */
bool server_multiple_authentications; /* Set to 'True' to allow squid 2.5
style 'challenge caching' */
char *user;
char *domain;
const char *workstation;
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 */
/* internal variables used by KEY_EXCH (client-supplied user session key */
DATA_BLOB encrypted_session_key;
/**
* 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
*
*/
const uint8_t *(*get_challenge)(const struct gensec_ntlmssp_state *);
/**
* 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 gensec_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 gensec_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 gensec_ntlmssp_state *,
TALLOC_CTX *mem_ctx,
DATA_BLOB *nt_session_key, DATA_BLOB *lm_session_key);
const char *server_name;
const char *(*get_domain)(void);
bool doing_ntlm2;
union {
/* NTLM */
struct {
uint32_t seq_num;
struct arcfour_state *arcfour_state;
} ntlm;
/* NTLM2 */
struct {
uint32_t send_seq_num;
uint32_t recv_seq_num;
DATA_BLOB send_sign_key;
DATA_BLOB recv_sign_key;
struct arcfour_state *send_seal_arcfour_state;
struct arcfour_state *recv_seal_arcfour_state;
/* internal variables used by NTLM2 */
uint8_t session_nonce[16];
} ntlm2;
} crypt;
struct auth_context *auth_context;
struct auth_serversupplied_info *server_info;
};
struct auth_session_info;
#include "auth/ntlmssp/proto.h"
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