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456f51bcbe
the schannel code, but I've included that anyway. :-)
This patch revives the client-side NTLMSSP support for RPC named pipes
in Samba, and cleans up the client and server schannel code. The use of the
new code is enabled by the 'sign', 'seal' and 'schannel' commands in
rpcclient.
The aim was to prove that our separate NTLMSSP client library actually
implements NTLMSSP signing and sealing as per Microsoft's NTLMv1 implementation,
in the hope that knowing this will assist us in correctly implementing
NTLMSSP signing for SMB packets. (Still not yet functional)
This patch replaces the NTLMSSP implementation in rpc_client/cli_pipe.c with
calls to libsmb/ntlmssp.c. In the process, we have gained the ability to
use the more secure NT password, and the ability to sign-only, instead of
having to seal the pipe connection. (Previously we were limited to sealing,
and could only use the LM-password derived key).
Our new client-side NTLMSSP code also needed alteration to cope with our
comparatively simple server-side implementation. A future step is to replace
it with calls to the same NTLMSSP library.
Also included in this patch is the schannel 'sign only' patch I submitted to
the team earlier. While not enabled (and not functional, at this stage) the
work in this patch makes the code paths *much* easier to follow. I have also
included similar hooks in rpccleint to allow the use of schannel on *any* pipe.
rpcclient now defaults to not using schannel (or any other extra per-pipe
authenticiation) for any connection. The 'schannel' command enables schannel
for all pipes until disabled.
This code is also much more secure than the previous code, as changes to our
cli_pipe routines ensure that the authentication footer cannot be removed
by an attacker, and more error states are correctly handled.
(The same needs to be done to our server)
Andrew Bartlett
(This used to be commit 5472ddc9ea)
139 lines
4.0 KiB
C
139 lines
4.0 KiB
C
/*
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Unix SMB/CIFS implementation.
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SMB parameters and setup
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Copyright (C) Andrew Tridgell 1992-1997
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Copyright (C) Luke Kenneth Casson Leighton 1996-1997
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Copyright (C) Paul Ashton 1997
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* NTLMSSP mode */
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enum NTLMSSP_ROLE
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{
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NTLMSSP_SERVER,
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NTLMSSP_CLIENT
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};
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/* NTLMSSP message types */
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enum NTLM_MESSAGE_TYPE
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{
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NTLMSSP_NEGOTIATE = 1,
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NTLMSSP_CHALLENGE = 2,
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NTLMSSP_AUTH = 3,
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NTLMSSP_UNKNOWN = 4
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};
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/* NTLMSSP negotiation flags */
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#define NTLMSSP_NEGOTIATE_UNICODE 0x00000001
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#define NTLMSSP_NEGOTIATE_OEM 0x00000002
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#define NTLMSSP_REQUEST_TARGET 0x00000004
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#define NTLMSSP_NEGOTIATE_SIGN 0x00000010 /* Message integrity */
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#define NTLMSSP_NEGOTIATE_SEAL 0x00000020 /* Message confidentiality */
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#define NTLMSSP_NEGOTIATE_DATAGRAM_STYLE 0x00000040
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#define NTLMSSP_NEGOTIATE_LM_KEY 0x00000080
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#define NTLMSSP_NEGOTIATE_NETWARE 0x00000100
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#define NTLMSSP_NEGOTIATE_NTLM 0x00000200
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#define NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED 0x00001000
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#define NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED 0x00002000
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#define NTLMSSP_NEGOTIATE_THIS_IS_LOCAL_CALL 0x00004000
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#define NTLMSSP_NEGOTIATE_ALWAYS_SIGN 0x00008000
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#define NTLMSSP_TARGET_TYPE_DOMAIN 0x10000
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#define NTLMSSP_TARGET_TYPE_SERVER 0x20000
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#define NTLMSSP_CHAL_INIT_RESPONSE 0x00010000
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#define NTLMSSP_CHAL_ACCEPT_RESPONSE 0x00020000
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#define NTLMSSP_CHAL_NON_NT_SESSION_KEY 0x00040000
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#define NTLMSSP_NEGOTIATE_NTLM2 0x00080000
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#define NTLMSSP_CHAL_TARGET_INFO 0x00800000
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#define NTLMSSP_NEGOTIATE_128 0x20000000 /* 128-bit encryption */
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#define NTLMSSP_NEGOTIATE_KEY_EXCH 0x40000000
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#define NTLMSSP_NEGOTIATE_080000000 0x80000000
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#define NTLMSSP_NAME_TYPE_SERVER 0x01
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#define NTLMSSP_NAME_TYPE_DOMAIN 0x02
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#define NTLMSSP_NAME_TYPE_SERVER_DNS 0x03
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#define NTLMSSP_NAME_TYPE_DOMAIN_DNS 0x04
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typedef struct ntlmssp_state
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{
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TALLOC_CTX *mem_ctx;
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enum NTLMSSP_ROLE role;
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BOOL unicode;
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char *user;
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char *domain;
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char *workstation;
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DATA_BLOB lm_resp;
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DATA_BLOB nt_resp;
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DATA_BLOB chal;
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void *auth_context;
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const uint8 *(*get_challenge)(struct ntlmssp_state *ntlmssp_state);
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NTSTATUS (*check_password)(struct ntlmssp_state *ntlmssp_state);
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const char *(*get_global_myname)(void);
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const char *(*get_domain)(void);
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int server_role;
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uint32 expected_state;
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} NTLMSSP_STATE;
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typedef struct ntlmssp_client_state
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{
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TALLOC_CTX *mem_ctx;
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unsigned int ref_count;
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BOOL unicode;
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BOOL use_ntlmv2;
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char *user;
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char *domain;
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char *workstation;
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char *password;
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const char *(*get_global_myname)(void);
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const char *(*get_domain)(void);
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DATA_BLOB chal;
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DATA_BLOB lm_resp;
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DATA_BLOB nt_resp;
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DATA_BLOB session_key;
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uint32 neg_flags;
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/* SMB Signing */
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uint32 ntlmssp_seq_num;
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/* ntlmv2 */
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char cli_sign_const[16];
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char cli_seal_const[16];
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char srv_sign_const[16];
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char srv_seal_const[16];
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unsigned char cli_sign_hash[258];
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unsigned char cli_seal_hash[258];
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unsigned char srv_sign_hash[258];
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unsigned char srv_seal_hash[258];
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/* ntlmv1 */
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unsigned char ntlmssp_hash[258];
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/* it turns out that we don't always get the
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response in at the time we want to process it.
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Store it here, until we need it */
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DATA_BLOB stored_response;
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} NTLMSSP_CLIENT_STATE;
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