summaryrefslogtreecommitdiffstats
path: root/source4/auth/auth_winbind.c
blob: c0024285817092d1be1d503180838f49b618d43d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
/* 
   Unix SMB/CIFS implementation.

   Winbind authentication mechnism

   Copyright (C) Tim Potter 2000
   Copyright (C) Andrew Bartlett 2001 - 2002
   Copyright (C) Stefan Metzmacher 2005
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "auth/auth.h"
#include "nsswitch/winbind_client.h"
#include "librpc/gen_ndr/ndr_netlogon.h"
#include "librpc/gen_ndr/ndr_winbind.h"
#include "lib/messaging/irpc.h"

static NTSTATUS get_info3_from_ndr(TALLOC_CTX *mem_ctx, struct winbindd_response *response, struct netr_SamInfo3 *info3)
{
	size_t len = response->length - sizeof(struct winbindd_response);
	if (len > 4) {
		enum ndr_err_code ndr_err;
		DATA_BLOB blob;
		blob.length = len - 4;
		blob.data = (uint8_t *)(((char *)response->extra_data.data) + 4);

		ndr_err = ndr_pull_struct_blob(&blob, mem_ctx, info3,
					      (ndr_pull_flags_fn_t)ndr_pull_netr_SamInfo3);
		if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
			return ndr_map_error2ntstatus(ndr_err);
		}

		return NT_STATUS_OK;
	} else {
		DEBUG(2, ("get_info3_from_ndr: No info3 struct found!\n"));
		return NT_STATUS_UNSUCCESSFUL;
	}
}

static NTSTATUS winbind_want_check(struct auth_method_context *ctx,
				   TALLOC_CTX *mem_ctx,
				   const struct auth_usersupplied_info *user_info)
{
	if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
		return NT_STATUS_NOT_IMPLEMENTED;
	}

	/* TODO: maybe limit the user scope to remote users only */
	return NT_STATUS_OK;
}

/*
 Authenticate a user with a challenge/response
 using the samba3 winbind protocol
*/
static NTSTATUS winbind_check_password_samba3(struct auth_method_context *ctx,
					      TALLOC_CTX *mem_ctx,
					      const struct auth_usersupplied_info *user_info, 
					      struct auth_serversupplied_info **server_info)
{
	struct winbindd_request request;
	struct winbindd_response response;
        NSS_STATUS result;
	NTSTATUS nt_status;
	struct netr_SamInfo3 info3;		

	/* Send off request */
	const struct auth_usersupplied_info *user_info_temp;	
	nt_status = encrypt_user_info(mem_ctx, ctx->auth_ctx, 
				      AUTH_PASSWORD_RESPONSE, 
				      user_info, &user_info_temp);
	if (!NT_STATUS_IS_OK(nt_status)) {
		return nt_status;
	}
	user_info = user_info_temp;

	ZERO_STRUCT(request);
	ZERO_STRUCT(response);
	request.flags = WBFLAG_PAM_INFO3_NDR;

	request.data.auth_crap.logon_parameters = user_info->logon_parameters;

	safe_strcpy(request.data.auth_crap.user,
		       user_info->client.account_name, sizeof(fstring));
	safe_strcpy(request.data.auth_crap.domain,
		       user_info->client.domain_name, sizeof(fstring));
	safe_strcpy(request.data.auth_crap.workstation,
		       user_info->workstation_name, sizeof(fstring));

	memcpy(request.data.auth_crap.chal, ctx->auth_ctx->challenge.data.data, sizeof(request.data.auth_crap.chal));

	request.data.auth_crap.lm_resp_len = MIN(user_info->password.response.lanman.length,
						 sizeof(request.data.auth_crap.lm_resp));
	request.data.auth_crap.nt_resp_len = MIN(user_info->password.response.nt.length, 
						 sizeof(request.data.auth_crap.nt_resp));

	memcpy(request.data.auth_crap.lm_resp, user_info->password.response.lanman.data,
	       request.data.auth_crap.lm_resp_len);
	memcpy(request.data.auth_crap.nt_resp, user_info->password.response.nt.data,
	       request.data.auth_crap.nt_resp_len);

	result = winbindd_request_response(WINBINDD_PAM_AUTH_CRAP, &request, &response);

	nt_status = NT_STATUS(response.data.auth.nt_status);
	NT_STATUS_NOT_OK_RETURN(nt_status);

	if (result == NSS_STATUS_SUCCESS && response.extra_data.data) {
		union netr_Validation validation;

		nt_status = get_info3_from_ndr(mem_ctx, &response, &info3);
		SAFE_FREE(response.extra_data.data);
		NT_STATUS_NOT_OK_RETURN(nt_status); 

		validation.sam3 = &info3;
		nt_status = make_server_info_netlogon_validation(mem_ctx, 
								 user_info->client.account_name, 
								 3, &validation,
								 server_info);
		return nt_status;
	} else if (result == NSS_STATUS_SUCCESS && !response.extra_data.data) {
		DEBUG(0, ("Winbindd authenticated the user [%s]\\[%s], "
			  "but did not include the required info3 reply!\n", 
			  user_info->client.domain_name, user_info->client.account_name));
		return NT_STATUS_INSUFFICIENT_LOGON_INFO;
	} else if (NT_STATUS_IS_OK(nt_status)) {
		DEBUG(1, ("Winbindd authentication for [%s]\\[%s] failed, "
			  "but no error code is available!\n", 
			  user_info->client.domain_name, user_info->client.account_name));
		return NT_STATUS_NO_LOGON_SERVERS;
	}

        return nt_status;
}

struct winbind_check_password_state {
	struct winbind_SamLogon req;
};

/*
 Authenticate a user with a challenge/response
 using IRPC to the winbind task
*/
static NTSTATUS winbind_check_password(struct auth_method_context *ctx,
				       TALLOC_CTX *mem_ctx,
				       const struct auth_usersupplied_info *user_info, 
				       struct auth_serversupplied_info **server_info)
{
	NTSTATUS status;
	struct server_id *winbind_servers;
	struct winbind_check_password_state *s;
	const struct auth_usersupplied_info *user_info_new;
	struct netr_IdentityInfo *identity_info;

	s = talloc(mem_ctx, struct winbind_check_password_state);
	NT_STATUS_HAVE_NO_MEMORY(s);

	winbind_servers = irpc_servers_byname(ctx->auth_ctx->msg_ctx, s, "winbind_server");
	if ((winbind_servers == NULL) || (winbind_servers[0].id == 0)) {
		DEBUG(0, ("Winbind authentication for [%s]\\[%s] failed, " 
			  "no winbind_server running!\n",
			  user_info->client.domain_name, user_info->client.account_name));
		return NT_STATUS_NO_LOGON_SERVERS;
	}

	if (user_info->flags & USER_INFO_INTERACTIVE_LOGON) {
		struct netr_PasswordInfo *password_info;

		status = encrypt_user_info(s, ctx->auth_ctx, AUTH_PASSWORD_HASH,
					   user_info, &user_info_new);
		NT_STATUS_NOT_OK_RETURN(status);
		user_info = user_info_new;

		password_info = talloc(s, struct netr_PasswordInfo);
		NT_STATUS_HAVE_NO_MEMORY(password_info);

		password_info->lmpassword = *user_info->password.hash.lanman;
		password_info->ntpassword = *user_info->password.hash.nt;

		identity_info = &password_info->identity_info;
		s->req.in.logon_level	= 1;
		s->req.in.logon.password= password_info;
	} else {
		struct netr_NetworkInfo *network_info;
		const uint8_t *challenge;

		status = encrypt_user_info(s, ctx->auth_ctx, AUTH_PASSWORD_RESPONSE,
					   user_info, &user_info_new);
		NT_STATUS_NOT_OK_RETURN(status);
		user_info = user_info_new;

		network_info = talloc(s, struct netr_NetworkInfo);
		NT_STATUS_HAVE_NO_MEMORY(network_info);

		status = auth_get_challenge(ctx->auth_ctx, &challenge);
		NT_STATUS_NOT_OK_RETURN(status);

		memcpy(network_info->challenge, challenge, sizeof(network_info->challenge));

		network_info->nt.length = user_info->password.response.nt.length;
		network_info->nt.data	= user_info->password.response.nt.data;

		network_info->lm.length = user_info->password.response.lanman.length;
		network_info->lm.data	= user_info->password.response.lanman.data;

		identity_info = &network_info->identity_info;
		s->req.in.logon_level	= 2;
		s->req.in.logon.network = network_info;
	}

	identity_info->domain_name.string	= user_info->client.domain_name;
	identity_info->parameter_control	= user_info->logon_parameters; /* see MSV1_0_* */
	identity_info->logon_id_low		= 0;
	identity_info->logon_id_high		= 0;
	identity_info->account_name.string	= user_info->client.account_name;
	identity_info->workstation.string	= user_info->workstation_name;

	s->req.in.validation_level	= 3;

	status = IRPC_CALL(ctx->auth_ctx->msg_ctx, winbind_servers[0],
			   winbind, WINBIND_SAMLOGON,
			   &s->req, s);
	NT_STATUS_NOT_OK_RETURN(status);

	status = make_server_info_netlogon_validation(mem_ctx,
						      user_info->client.account_name,
						      s->req.in.validation_level,
						      &s->req.out.validation,
						      server_info);
	NT_STATUS_NOT_OK_RETURN(status);

	return NT_STATUS_OK;
}

static const struct auth_operations winbind_samba3_ops = {
	.name		= "winbind_samba3",
	.get_challenge	= auth_get_challenge_not_implemented,
	.want_check	= winbind_want_check,
	.check_password	= winbind_check_password_samba3
};

static const struct auth_operations winbind_ops = {
	.name		= "winbind",
	.get_challenge	= auth_get_challenge_not_implemented,
	.want_check	= winbind_want_check,
	.check_password	= winbind_check_password
};

NTSTATUS auth_winbind_init(void)
{
	NTSTATUS ret;

	ret = auth_register(&winbind_samba3_ops);
	if (!NT_STATUS_IS_OK(ret)) {
		DEBUG(0,("Failed to register 'winbind_samba3' auth backend!\n"));
		return ret;
	}

	ret = auth_register(&winbind_ops);
	if (!NT_STATUS_IS_OK(ret)) {
		DEBUG(0,("Failed to register 'winbind' auth backend!\n"));
		return ret;
	}

	return NT_STATUS_OK;
}