source: trunk-3.0/source/auth/auth_compat.c@ 101

Last change on this file since 101 was 1, checked in by Paul Smedley, 18 years ago

Initial code import
File size: 4.5 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 Password and authentication handling
4 Copyright (C) Andrew Bartlett 2001-2002
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19*/
20
21#include "includes.h"
22
23extern struct auth_context *negprot_global_auth_context;
24extern BOOL global_encrypted_passwords_negotiated;
25
26#undef DBGC_CLASS
27#define DBGC_CLASS DBGC_AUTH
28
29/****************************************************************************
30 COMPATIBILITY INTERFACES:
31 ***************************************************************************/
32
33/****************************************************************************
34check if a username/password is OK assuming the password is a 24 byte
35SMB hash
36return True if the password is correct, False otherwise
37****************************************************************************/
38
39NTSTATUS check_plaintext_password(const char *smb_name, DATA_BLOB plaintext_password, auth_serversupplied_info **server_info)
40{
41 struct auth_context *plaintext_auth_context = NULL;
42 auth_usersupplied_info *user_info = NULL;
43 const uint8 *chal;
44 NTSTATUS nt_status;
45 if (!NT_STATUS_IS_OK(nt_status = make_auth_context_subsystem(&plaintext_auth_context))) {
46 return nt_status;
47 }
48
49 chal = plaintext_auth_context->get_ntlm_challenge(plaintext_auth_context);
50
51 if (!make_user_info_for_reply(&user_info,
52 smb_name, lp_workgroup(), chal,
53 plaintext_password)) {
54 return NT_STATUS_NO_MEMORY;
55 }
56
57 nt_status = plaintext_auth_context->check_ntlm_password(plaintext_auth_context,
58 user_info, server_info);
59
60 (plaintext_auth_context->free)(&plaintext_auth_context);
61 free_user_info(&user_info);
62 return nt_status;
63}
64
65static NTSTATUS pass_check_smb(const char *smb_name,
66 const char *domain,
67 DATA_BLOB lm_pwd,
68 DATA_BLOB nt_pwd,
69 DATA_BLOB plaintext_password,
70 BOOL encrypted)
71
72{
73 NTSTATUS nt_status;
74 auth_serversupplied_info *server_info = NULL;
75 if (encrypted) {
76 auth_usersupplied_info *user_info = NULL;
77 make_user_info_for_reply_enc(&user_info, smb_name,
78 domain,
79 lm_pwd,
80 nt_pwd);
81 nt_status = negprot_global_auth_context->check_ntlm_password(negprot_global_auth_context,
82 user_info, &server_info);
83 free_user_info(&user_info);
84 } else {
85 nt_status = check_plaintext_password(smb_name, plaintext_password, &server_info);
86 }
87 TALLOC_FREE(server_info);
88 return nt_status;
89}
90
91/****************************************************************************
92check if a username/password pair is ok via the auth subsystem.
93return True if the password is correct, False otherwise
94****************************************************************************/
95
96BOOL password_ok(char *smb_name, DATA_BLOB password_blob)
97{
98
99 DATA_BLOB null_password = data_blob(NULL, 0);
100 BOOL encrypted = (global_encrypted_passwords_negotiated && (password_blob.length == 24 || password_blob.length > 46));
101
102 if (encrypted) {
103 /*
104 * The password could be either NTLM or plain LM. Try NTLM first,
105 * but fall-through as required.
106 * Vista sends NTLMv2 here - we need to try the client given workgroup.
107 */
108 if (get_session_workgroup()) {
109 if (NT_STATUS_IS_OK(pass_check_smb(smb_name, get_session_workgroup(), null_password, password_blob, null_password, encrypted))) {
110 return True;
111 }
112 if (NT_STATUS_IS_OK(pass_check_smb(smb_name, get_session_workgroup(), password_blob, null_password, null_password, encrypted))) {
113 return True;
114 }
115 }
116
117 if (NT_STATUS_IS_OK(pass_check_smb(smb_name, lp_workgroup(), null_password, password_blob, null_password, encrypted))) {
118 return True;
119 }
120
121 if (NT_STATUS_IS_OK(pass_check_smb(smb_name, lp_workgroup(), password_blob, null_password, null_password, encrypted))) {
122 return True;
123 }
124 } else {
125 if (NT_STATUS_IS_OK(pass_check_smb(smb_name, lp_workgroup(), null_password, null_password, password_blob, encrypted))) {
126 return True;
127 }
128 }
129
130 return False;
131}
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