7efeb9242ade938a37e2db69f416de489e337843
[samba.git] / source4 / auth / ntlm / auth_server.c
1 /* 
2    Unix SMB/CIFS implementation.
3    Authenticate by using a remote server
4    Copyright (C) Andrew Bartlett         2001-2002, 2008
5    Copyright (C) Jelmer Vernooij              2002
6    Copyright (C) Stefan Metzmacher            2005
7    
8    This program is free software; you can redistribute it and/or modify
9    it under the terms of the GNU General Public License as published by
10    the Free Software Foundation; either version 3 of the License, or
11    (at your option) any later version.
12    
13    This program is distributed in the hope that it will be useful,
14    but WITHOUT ANY WARRANTY; without even the implied warranty of
15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16    GNU General Public License for more details.
17    
18    You should have received a copy of the GNU General Public License
19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "auth/auth.h"
24 #include "auth/credentials/credentials.h"
25 #include "libcli/security/security.h"
26 #include "libcli/smb_composite/smb_composite.h"
27 #include "param/param.h"
28 #include "libcli/resolve/resolve.h"
29
30 _PUBLIC_ NTSTATUS auth_server_init(void);
31
32 /* This version of 'security=server' rewirtten from scratch for Samba4
33  * libraries in 2008 */
34
35
36 static NTSTATUS server_want_check(struct auth_method_context *ctx,
37                                             TALLOC_CTX *mem_ctx,
38                                             const struct auth_usersupplied_info *user_info)
39 {
40         return NT_STATUS_OK;
41 }
42 /** 
43  * The challenge from the target server, when operating in security=server
44  **/
45 static NTSTATUS server_get_challenge(struct auth_method_context *ctx, TALLOC_CTX *mem_ctx, uint8_t chal[8])
46 {
47         struct smb_composite_connect io;
48         struct smbcli_options smb_options;
49         const char **host_list;
50         NTSTATUS status;
51
52         /* Make a connection to the target server, found by 'password server' in smb.conf */
53         
54         lpcfg_smbcli_options(ctx->auth_ctx->lp_ctx, &smb_options);
55
56         /* Make a negprot, WITHOUT SPNEGO, so we get a challenge nice an easy */
57         io.in.options.use_spnego = false;
58
59         /* Hope we don't get * (the default), as this won't work... */
60         host_list = lpcfg_passwordserver(ctx->auth_ctx->lp_ctx);
61         if (!host_list) {
62                 return NT_STATUS_INTERNAL_ERROR;
63         }
64         io.in.dest_host = host_list[0];
65         if (strequal(io.in.dest_host, "*")) {
66                 return NT_STATUS_INTERNAL_ERROR;
67         }
68         io.in.dest_ports = lpcfg_smb_ports(ctx->auth_ctx->lp_ctx);
69         io.in.socket_options = lpcfg_socket_options(ctx->auth_ctx->lp_ctx);
70         io.in.gensec_settings = lpcfg_gensec_settings(mem_ctx, ctx->auth_ctx->lp_ctx);
71
72         io.in.called_name = strupper_talloc(mem_ctx, io.in.dest_host);
73
74         /* We don't want to get as far as the session setup */
75         io.in.credentials = cli_credentials_init_anon(mem_ctx);
76         cli_credentials_set_workstation(io.in.credentials,
77                                         lpcfg_netbios_name(ctx->auth_ctx->lp_ctx),
78                                         CRED_SPECIFIED);
79
80         io.in.service = NULL;
81
82         io.in.workgroup = ""; /* only used with SPNEGO, disabled above */
83
84         io.in.options = smb_options;
85         
86         lpcfg_smbcli_session_options(ctx->auth_ctx->lp_ctx, &io.in.session_options);
87
88         status = smb_composite_connect(&io, mem_ctx, lpcfg_resolve_context(ctx->auth_ctx->lp_ctx),
89                                        ctx->auth_ctx->event_ctx);
90         NT_STATUS_NOT_OK_RETURN(status);
91
92         if (io.out.tree->session->transport->negotiate.secblob.length != 8) {
93                 return NT_STATUS_INTERNAL_ERROR;
94         }
95         memcpy(chal, io.out.tree->session->transport->negotiate.secblob.data, 8);
96         ctx->private_data = talloc_steal(ctx, io.out.tree->session);
97         return NT_STATUS_OK;
98 }
99
100 /** 
101  * Return an error based on username
102  *
103  * This function allows the testing of obsure errors, as well as the generation
104  * of NT_STATUS -> DOS error mapping tables.
105  *
106  * This module is of no value to end-users.
107  *
108  * The password is ignored.
109  *
110  * @return An NTSTATUS value based on the username
111  **/
112
113 static NTSTATUS server_check_password(struct auth_method_context *ctx,
114                                       TALLOC_CTX *mem_ctx,
115                                       const struct auth_usersupplied_info *user_info, 
116                                       struct auth_user_info_dc **_user_info_dc)
117 {
118         NTSTATUS nt_status;
119         struct auth_user_info_dc *user_info_dc;
120         struct auth_user_info *info;
121         struct cli_credentials *creds;
122         struct smb_composite_sesssetup session_setup;
123
124         struct smbcli_session *session = talloc_get_type(ctx->private_data, struct smbcli_session);
125
126         creds = cli_credentials_init(mem_ctx);
127
128         NT_STATUS_HAVE_NO_MEMORY(creds);
129         
130         cli_credentials_set_username(creds, user_info->client.account_name, CRED_SPECIFIED);
131         cli_credentials_set_domain(creds, user_info->client.domain_name, CRED_SPECIFIED);
132
133         switch (user_info->password_state) {
134         case AUTH_PASSWORD_PLAIN:
135                 cli_credentials_set_password(creds, user_info->password.plaintext, 
136                                              CRED_SPECIFIED);
137                 break;
138         case AUTH_PASSWORD_HASH:
139                 cli_credentials_set_nt_hash(creds, user_info->password.hash.nt,
140                                             CRED_SPECIFIED);
141                 break;
142                 
143         case AUTH_PASSWORD_RESPONSE:
144                 cli_credentials_set_ntlm_response(creds, &user_info->password.response.lanman, &user_info->password.response.nt, CRED_SPECIFIED);
145                 break;
146         }
147
148         session_setup.in.sesskey = session->transport->negotiate.sesskey;
149         session_setup.in.capabilities = session->transport->negotiate.capabilities;
150
151         session_setup.in.credentials = creds;
152         session_setup.in.workgroup = ""; /* Only used with SPNEGO, which we are not doing */
153         session_setup.in.gensec_settings = lpcfg_gensec_settings(session, ctx->auth_ctx->lp_ctx);
154
155         /* Check password with remove server - this should be async some day */
156         nt_status = smb_composite_sesssetup(session, &session_setup);
157
158         if (!NT_STATUS_IS_OK(nt_status)) {
159                 return nt_status;
160         }
161
162         user_info_dc = talloc(mem_ctx, struct auth_user_info_dc);
163         NT_STATUS_HAVE_NO_MEMORY(user_info_dc);
164
165         user_info_dc->num_sids = 1;
166
167         /* This returns a pointer to a struct dom_sid, which is the
168          * same as a 1 element list of struct dom_sid */
169         user_info_dc->sids = dom_sid_parse_talloc(user_info_dc, SID_NT_ANONYMOUS);
170         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->sids);
171
172         /* annoying, but the Anonymous really does have a session key, 
173            and it is all zeros! */
174         user_info_dc->user_session_key = data_blob(NULL, 0);
175         user_info_dc->lm_session_key = data_blob(NULL, 0);
176
177         user_info_dc->info = info = talloc_zero(user_info_dc, struct auth_user_info);
178         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->info);
179
180         info->account_name = talloc_strdup(user_info_dc, user_info->client.account_name);
181         NT_STATUS_HAVE_NO_MEMORY(info->account_name);
182
183         info->domain_name = talloc_strdup(user_info_dc, user_info->client.domain_name);
184         NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
185
186         info->full_name = NULL;
187
188         info->logon_script = talloc_strdup(user_info_dc, "");
189         NT_STATUS_HAVE_NO_MEMORY(info->logon_script);
190
191         info->profile_path = talloc_strdup(user_info_dc, "");
192         NT_STATUS_HAVE_NO_MEMORY(info->profile_path);
193
194         info->home_directory = talloc_strdup(user_info_dc, "");
195         NT_STATUS_HAVE_NO_MEMORY(info->home_directory);
196
197         info->home_drive = talloc_strdup(user_info_dc, "");
198         NT_STATUS_HAVE_NO_MEMORY(info->home_drive);
199
200         info->last_logon = 0;
201         info->last_logoff = 0;
202         info->acct_expiry = 0;
203         info->last_password_change = 0;
204         info->allow_password_change = 0;
205         info->force_password_change = 0;
206
207         info->logon_count = 0;
208         info->bad_password_count = 0;
209
210         info->acct_flags = ACB_NORMAL;
211
212         info->authenticated = false;
213
214         *_user_info_dc = user_info_dc;
215
216         return nt_status;
217 }
218
219 static const struct auth_operations server_auth_ops = {
220         .name           = "server",
221         .get_challenge  = server_get_challenge,
222         .want_check     = server_want_check,
223         .check_password = server_check_password
224 };
225
226 _PUBLIC_ NTSTATUS auth_server_init(void)
227 {
228         NTSTATUS ret;
229
230         ret = auth_register(&server_auth_ops);
231         if (!NT_STATUS_IS_OK(ret)) {
232                 DEBUG(0,("Failed to register 'server' auth backend!\n"));
233                 return ret;
234         }
235
236         return ret;
237 }