28a9780d3f9b658d216be85539b9b05eed430228
[ira/wip.git] / source3 / auth / auth_compat.c
1 /* 
2    Unix SMB/Netbios implementation.
3    Version 3.0.
4    Password and authentication handling
5    Copyright (C) Andrew Bartlett         2001-2002
6    
7    This program is free software; you can redistribute it and/or modify
8    it under the terms of the GNU General Public License as published by
9    the Free Software Foundation; either version 2 of the License, or
10    (at your option) any later version.
11    
12    This program is distributed in the hope that it will be useful,
13    but WITHOUT ANY WARRANTY; without even the implied warranty of
14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15    GNU General Public License for more details.
16    
17    You should have received a copy of the GNU General Public License
18    along with this program; if not, write to the Free Software
19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22 #include "includes.h"
23
24 /****************************************************************************
25  COMPATABILITY INTERFACES:
26  ***************************************************************************/
27
28 /****************************************************************************
29 check if a username/password is OK assuming the password is a 24 byte
30 SMB hash
31 return True if the password is correct, False otherwise
32 ****************************************************************************/
33
34 static NTSTATUS pass_check_smb(char *smb_name,
35                                char *domain, 
36                                DATA_BLOB lm_pwd,
37                                DATA_BLOB nt_pwd,
38                                DATA_BLOB plaintext_password,
39                                BOOL encrypted)
40
41 {
42         NTSTATUS nt_status;
43         auth_usersupplied_info *user_info = NULL;
44         extern struct auth_context *negprot_global_auth_context;
45         auth_serversupplied_info *server_info = NULL;
46         if (encrypted) {                
47                 make_user_info_for_reply_enc(&user_info, smb_name, 
48                                              domain,
49                                              lm_pwd, 
50                                              nt_pwd);
51                 nt_status = negprot_global_auth_context->check_ntlm_password(negprot_global_auth_context, 
52                                                                              user_info, &server_info);
53         } else {
54                 struct auth_context *plaintext_auth_context = NULL;
55                 const uint8 *chal;
56                 if (!NT_STATUS_IS_OK(nt_status = make_auth_context_subsystem(&plaintext_auth_context))) {
57                         return nt_status;
58                 }
59
60                 chal = plaintext_auth_context->get_ntlm_challenge(plaintext_auth_context);
61
62                 if (!make_user_info_for_reply(&user_info, 
63                                               smb_name, domain, chal,
64                                               plaintext_password)) {
65                         return NT_STATUS_NO_MEMORY;
66                 }
67                 
68                 nt_status = plaintext_auth_context->check_ntlm_password(plaintext_auth_context, 
69                                                                         user_info, &server_info); 
70                 
71                 (plaintext_auth_context->free)(&plaintext_auth_context);
72         }               
73         free_user_info(&user_info);
74         free_server_info(&server_info);
75         return nt_status;
76 }
77
78 /****************************************************************************
79 check if a username/password pair is ok via the auth subsystem.
80 return True if the password is correct, False otherwise
81 ****************************************************************************/
82 BOOL password_ok(char *smb_name, DATA_BLOB password_blob)
83 {
84
85         DATA_BLOB null_password = data_blob(NULL, 0);
86         extern BOOL global_encrypted_passwords_negotiated;
87         BOOL encrypted = (global_encrypted_passwords_negotiated && password_blob.length == 24);
88         
89         if (encrypted) {
90                 /* 
91                  * The password could be either NTLM or plain LM.  Try NTLM first, 
92                  * but fall-through as required.
93                  * NTLMv2 makes no sense here.
94                  */
95                 if (NT_STATUS_IS_OK(pass_check_smb(smb_name, lp_workgroup(), null_password, password_blob, null_password, encrypted))) {
96                         return True;
97                 }
98                 
99                 if (NT_STATUS_IS_OK(pass_check_smb(smb_name, lp_workgroup(), password_blob, null_password, null_password, encrypted))) {
100                         return True;
101                 }
102         } else {
103                 if (NT_STATUS_IS_OK(pass_check_smb(smb_name, lp_workgroup(), null_password, null_password, password_blob, encrypted))) {
104                         return True;
105                 }
106         }
107
108         return False;
109 }
110
111