Line data Source code
1 : /*
2 : Unix SMB/Netbios implementation.
3 : Version 3.0
4 : handle NLTMSSP, client server side parsing
5 :
6 : Copyright (C) Andrew Tridgell 2001
7 : Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2005
8 : Copyright (C) Stefan Metzmacher 2005
9 :
10 : This program is free software; you can redistribute it and/or modify
11 : it under the terms of the GNU General Public License as published by
12 : the Free Software Foundation; either version 3 of the License, or
13 : (at your option) any later version.
14 :
15 : This program is distributed in the hope that it will be useful,
16 : but WITHOUT ANY WARRANTY; without even the implied warranty of
17 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 : GNU General Public License for more details.
19 :
20 : You should have received a copy of the GNU General Public License
21 : along with this program. If not, see <http://www.gnu.org/licenses/>.
22 : */
23 :
24 : #include "includes.h"
25 : #include "system/network.h"
26 : #include "lib/tsocket/tsocket.h"
27 : #include "auth/ntlmssp/ntlmssp.h"
28 : #include "../librpc/gen_ndr/ndr_ntlmssp.h"
29 : #include "auth/ntlmssp/ntlmssp_ndr.h"
30 : #include "auth/ntlmssp/ntlmssp_private.h"
31 : #include "../libcli/auth/libcli_auth.h"
32 : #include "../lib/crypto/crypto.h"
33 : #include "auth/gensec/gensec.h"
34 : #include "auth/gensec/gensec_internal.h"
35 : #include "auth/common_auth.h"
36 : #include "param/param.h"
37 : #include "param/loadparm.h"
38 : #include "libds/common/roles.h"
39 :
40 : #undef DBGC_CLASS
41 : #define DBGC_CLASS DBGC_AUTH
42 :
43 : /**
44 : * Return the credentials of a logged on user, including session keys
45 : * etc.
46 : *
47 : * Only valid after a successful authentication
48 : *
49 : * May only be called once per authentication.
50 : *
51 : */
52 :
53 33044 : NTSTATUS gensec_ntlmssp_session_info(struct gensec_security *gensec_security,
54 : TALLOC_CTX *mem_ctx,
55 : struct auth_session_info **session_info)
56 : {
57 139 : NTSTATUS nt_status;
58 139 : struct gensec_ntlmssp_context *gensec_ntlmssp =
59 33044 : talloc_get_type_abort(gensec_security->private_data,
60 : struct gensec_ntlmssp_context);
61 33044 : uint32_t session_info_flags = 0;
62 :
63 33044 : if (gensec_security->want_features & GENSEC_FEATURE_UNIX_TOKEN) {
64 22045 : session_info_flags |= AUTH_SESSION_INFO_UNIX_TOKEN;
65 : }
66 :
67 33044 : session_info_flags |= AUTH_SESSION_INFO_DEFAULT_GROUPS;
68 33044 : session_info_flags |= AUTH_SESSION_INFO_NTLM;
69 :
70 33044 : if (gensec_security->auth_context && gensec_security->auth_context->generate_session_info) {
71 33183 : nt_status = gensec_security->auth_context->generate_session_info(gensec_security->auth_context, mem_ctx,
72 : gensec_ntlmssp->server_returned_info,
73 33044 : gensec_ntlmssp->ntlmssp_state->user,
74 : session_info_flags,
75 : session_info);
76 : } else {
77 0 : DEBUG(0, ("Cannot generate a session_info without the auth_context\n"));
78 0 : return NT_STATUS_INTERNAL_ERROR;
79 : }
80 :
81 33044 : NT_STATUS_NOT_OK_RETURN(nt_status);
82 :
83 33183 : nt_status = gensec_ntlmssp_session_key(gensec_security, *session_info,
84 33044 : &(*session_info)->session_key);
85 33044 : if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_USER_SESSION_KEY)) {
86 28 : (*session_info)->session_key = data_blob_null;
87 28 : nt_status = NT_STATUS_OK;
88 : }
89 :
90 33044 : return nt_status;
91 : }
92 :
93 : /**
94 : * Start NTLMSSP on the server side
95 : *
96 : */
97 68816 : NTSTATUS gensec_ntlmssp_server_start(struct gensec_security *gensec_security)
98 : {
99 148 : NTSTATUS nt_status;
100 148 : struct ntlmssp_state *ntlmssp_state;
101 148 : struct gensec_ntlmssp_context *gensec_ntlmssp;
102 148 : const char *netbios_name;
103 148 : const char *netbios_domain;
104 148 : const char *dns_name;
105 148 : const char *dns_domain;
106 148 : enum server_role role;
107 :
108 68816 : role = lpcfg_server_role(gensec_security->settings->lp_ctx);
109 :
110 68816 : nt_status = gensec_ntlmssp_start(gensec_security);
111 68816 : NT_STATUS_NOT_OK_RETURN(nt_status);
112 :
113 148 : gensec_ntlmssp =
114 68816 : talloc_get_type_abort(gensec_security->private_data,
115 : struct gensec_ntlmssp_context);
116 :
117 68816 : ntlmssp_state = talloc_zero(gensec_ntlmssp,
118 : struct ntlmssp_state);
119 68816 : if (!ntlmssp_state) {
120 0 : return NT_STATUS_NO_MEMORY;
121 : }
122 68816 : gensec_ntlmssp->ntlmssp_state = ntlmssp_state;
123 :
124 68816 : ntlmssp_state->role = NTLMSSP_SERVER;
125 :
126 68816 : ntlmssp_state->expected_state = NTLMSSP_NEGOTIATE;
127 :
128 68964 : ntlmssp_state->allow_lm_response =
129 68816 : lpcfg_lanman_auth(gensec_security->settings->lp_ctx);
130 :
131 104393 : if (ntlmssp_state->allow_lm_response &&
132 35577 : gensec_setting_bool(gensec_security->settings,
133 : "ntlmssp_server", "allow_lm_key", false))
134 : {
135 0 : ntlmssp_state->allow_lm_key = true;
136 : }
137 :
138 68816 : ntlmssp_state->force_old_spnego = false;
139 :
140 68816 : if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "force_old_spnego", false)) {
141 : /*
142 : * For testing Windows 2000 mode
143 : */
144 1474 : ntlmssp_state->force_old_spnego = true;
145 : }
146 :
147 68816 : ntlmssp_state->neg_flags =
148 : NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_VERSION;
149 :
150 68816 : if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "128bit", true)) {
151 68816 : ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_128;
152 : }
153 :
154 68816 : if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "56bit", true)) {
155 68816 : ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_56;
156 : }
157 :
158 68816 : if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "keyexchange", true)) {
159 68816 : ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_KEY_EXCH;
160 : }
161 :
162 68816 : if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "alwayssign", true)) {
163 68816 : ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
164 : }
165 :
166 68816 : if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "ntlm2", true)) {
167 68816 : ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
168 : }
169 :
170 68816 : if (ntlmssp_state->allow_lm_key) {
171 0 : ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
172 : }
173 :
174 : /*
175 : * We always allow NTLMSSP_NEGOTIATE_SIGN and NTLMSSP_NEGOTIATE_SEAL.
176 : *
177 : * These will be removed if the client doesn't want them.
178 : */
179 68816 : ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
180 68816 : ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
181 :
182 :
183 68816 : if (role == ROLE_STANDALONE) {
184 30612 : ntlmssp_state->server.is_standalone = true;
185 : } else {
186 38204 : ntlmssp_state->server.is_standalone = false;
187 : }
188 :
189 68816 : if (gensec_security->settings->server_netbios_name) {
190 136 : netbios_name = gensec_security->settings->server_netbios_name;
191 : } else {
192 68680 : netbios_name = lpcfg_netbios_name(gensec_security->settings->lp_ctx);
193 : }
194 :
195 68816 : if (gensec_security->settings->server_netbios_domain) {
196 136 : netbios_domain = gensec_security->settings->server_netbios_domain;
197 : } else {
198 68680 : netbios_domain = lpcfg_workgroup(gensec_security->settings->lp_ctx);
199 : }
200 :
201 68816 : if (gensec_security->settings->server_dns_name) {
202 54785 : dns_name = gensec_security->settings->server_dns_name;
203 : } else {
204 14031 : const char *dnsdomain = lpcfg_dnsdomain(gensec_security->settings->lp_ctx);
205 148 : char *lower_netbiosname;
206 :
207 14031 : lower_netbiosname = strlower_talloc(ntlmssp_state, netbios_name);
208 14031 : NT_STATUS_HAVE_NO_MEMORY(lower_netbiosname);
209 :
210 : /* Find out the DNS host name */
211 14031 : if (dnsdomain && dnsdomain[0] != '\0') {
212 14029 : dns_name = talloc_asprintf(ntlmssp_state, "%s.%s",
213 : lower_netbiosname,
214 : dnsdomain);
215 14029 : talloc_free(lower_netbiosname);
216 14029 : NT_STATUS_HAVE_NO_MEMORY(dns_name);
217 : } else {
218 2 : dns_name = lower_netbiosname;
219 : }
220 : }
221 :
222 68816 : if (gensec_security->settings->server_dns_domain) {
223 54785 : dns_domain = gensec_security->settings->server_dns_domain;
224 : } else {
225 14031 : dns_domain = lpcfg_dnsdomain(gensec_security->settings->lp_ctx);
226 : }
227 :
228 68816 : ntlmssp_state->server.netbios_name = talloc_strdup(ntlmssp_state, netbios_name);
229 68816 : NT_STATUS_HAVE_NO_MEMORY(ntlmssp_state->server.netbios_name);
230 :
231 68816 : ntlmssp_state->server.netbios_domain = talloc_strdup(ntlmssp_state, netbios_domain);
232 68816 : NT_STATUS_HAVE_NO_MEMORY(ntlmssp_state->server.netbios_domain);
233 :
234 68816 : ntlmssp_state->server.dns_name = talloc_strdup(ntlmssp_state, dns_name);
235 68816 : NT_STATUS_HAVE_NO_MEMORY(ntlmssp_state->server.dns_name);
236 :
237 68816 : ntlmssp_state->server.dns_domain = talloc_strdup(ntlmssp_state, dns_domain);
238 68816 : NT_STATUS_HAVE_NO_MEMORY(ntlmssp_state->server.dns_domain);
239 :
240 68816 : ntlmssp_state->neg_flags |= ntlmssp_state->required_flags;
241 68816 : ntlmssp_state->conf_flags = ntlmssp_state->neg_flags;
242 :
243 68816 : return NT_STATUS_OK;
244 : }
245 :
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