summaryrefslogtreecommitdiffstats
path: root/xlators/protocol/lib/src/authenticate.c
blob: ff2b58162b78d3b7456baaf31ae420659e3b781b (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
/*
  Copyright (c) 2007-2009 Gluster, Inc. <http://www.gluster.com>
  This file is part of GlusterFS.

  GlusterFS 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.

  GlusterFS 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/>.
*/

#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif

#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif

#include <stdio.h>
#include <dlfcn.h>
#include <errno.h>
#include "authenticate.h"

static void
init (dict_t *this,
      char *key,
      data_t *value,
      void *data)
{
	void *handle = NULL;
	char *auth_file = NULL;
	auth_handle_t *auth_handle = NULL;
	auth_fn_t authenticate = NULL;
	int *error = NULL;
        int  ret = 0;

	/* It gets over written */
	error = data;

	if (!strncasecmp (key, "ip", strlen ("ip"))) {
		gf_log ("authenticate", GF_LOG_ERROR,
			"AUTHENTICATION MODULE \"IP\" HAS BEEN REPLACED "
			"BY \"ADDR\"");
		dict_set (this, key, data_from_dynptr (NULL, 0));
		/* TODO: 1.3.x backword compatibility */
		// *error = -1;
		// return;
		key = "addr";
	}

	ret = gf_asprintf (&auth_file, "%s/%s.so", LIBDIR, key);
        if (-1 == ret) {
                gf_log ("authenticate", GF_LOG_ERROR, "asprintf failed");
                dict_set (this, key, data_from_dynptr (NULL, 0));
                *error = -1;
                return;
        }

	handle = dlopen (auth_file, RTLD_LAZY);
	if (!handle) {
		gf_log ("authenticate", GF_LOG_ERROR, "dlopen(%s): %s\n", 
			auth_file, dlerror ());
		dict_set (this, key, data_from_dynptr (NULL, 0));
		GF_FREE (auth_file);
		*error = -1;
		return;
	}
	GF_FREE (auth_file);
  
	authenticate = dlsym (handle, "gf_auth");
	if (!authenticate) {
		gf_log ("authenticate", GF_LOG_ERROR,
			"dlsym(gf_auth) on %s\n", dlerror ());
		dict_set (this, key, data_from_dynptr (NULL, 0));
		*error = -1;
		return;
	}

	auth_handle = GF_CALLOC (1, sizeof (*auth_handle),
                                 gf_common_mt_auth_handle_t);
	if (!auth_handle) {
		gf_log ("authenticate", GF_LOG_ERROR, "Out of memory");
		dict_set (this, key, data_from_dynptr (NULL, 0));
		*error = -1;
		return;
	}
	auth_handle->vol_opt = GF_CALLOC (1, sizeof (volume_opt_list_t),
                                       gf_common_mt_volume_opt_list_t);
	auth_handle->vol_opt->given_opt = dlsym (handle, "options");
	if (auth_handle->vol_opt->given_opt == NULL) {
		gf_log ("authenticate", GF_LOG_DEBUG,
			"volume option validation not specified");
	} 

	auth_handle->authenticate = authenticate;
	auth_handle->handle = handle;

	dict_set (this, key, 
		  data_from_dynptr (auth_handle, sizeof (*auth_handle)));
}

static void
fini (dict_t *this,
      char *key,
      data_t *value,
      void *data)
{
	auth_handle_t *handle = data_to_ptr (value);
	if (handle) {
		dlclose (handle->handle);
	}
}

int32_t
gf_auth_init (xlator_t *xl, dict_t *auth_modules)
{
	int ret = 0;
	auth_handle_t *handle = NULL;
	data_pair_t *pair = NULL;
	dict_foreach (auth_modules, init, &ret);
	if (!ret) {
		pair = auth_modules->members_list;
		while (pair) {
			handle = data_to_ptr (pair->value);
			if (handle) {
				list_add_tail (&(handle->vol_opt->list), 
					       &(xl->volume_options));
				if (-1 == 
				    validate_xlator_volume_options (xl, 
								    handle->vol_opt->given_opt)) {
					gf_log ("authenticate", GF_LOG_ERROR,
						"volume option validation "
						"failed");
					ret = -1;
				}
			}
			pair = pair->next;
		}
	}
	if (ret) {
		gf_log (xl->name, GF_LOG_ERROR, "authentication init failed");
		dict_foreach (auth_modules, fini, &ret);
		ret = -1;
	}
	return ret;
}

static dict_t *__input_params;
static dict_t *__config_params;

void 
map (dict_t *this,
     char *key,
     data_t *value,
     void *data)
{
	dict_t *res = data;
	auth_fn_t authenticate;
	auth_handle_t *handle = NULL;

	if (value && (handle = data_to_ptr (value)) && 
	    (authenticate = handle->authenticate)) {
		dict_set (res, key, 
			  int_to_data (authenticate (__input_params, 
						     __config_params)));
	} else {
		dict_set (res, key, int_to_data (AUTH_DONT_CARE));
	}
}

void 
reduce (dict_t *this,
	char *key,
	data_t *value,
	void *data)
{
	int64_t val = 0;
	int64_t *res = data;
	if (!data)
		return;

	val = data_to_int64 (value);
	switch (val)
	{
	case AUTH_ACCEPT:
		if (AUTH_DONT_CARE == *res)
			*res = AUTH_ACCEPT;
		break;

	case AUTH_REJECT:
		*res = AUTH_REJECT;
		break;

	case AUTH_DONT_CARE:
		break;
	}
}

 
auth_result_t 
gf_authenticate (dict_t *input_params, 
		 dict_t *config_params, 
		 dict_t *auth_modules) 
{
	dict_t *results = NULL;
	int64_t result = AUTH_DONT_CARE;

	results = get_new_dict ();
	__input_params = input_params;
	__config_params = config_params;

	dict_foreach (auth_modules, map, results);

	dict_foreach (results, reduce, &result);
	if (AUTH_DONT_CARE == result) {
		data_t *peerinfo_data = dict_get (input_params, "peer-info-name");
		char *name = NULL;

		if (peerinfo_data) {
			name = peerinfo_data->data;
		}

		gf_log ("auth", GF_LOG_ERROR,
			"no authentication module is interested in "
			"accepting remote-client %s", name);
		result = AUTH_REJECT;
	}
    
	dict_destroy (results);
	return result;
}

void 
gf_auth_fini (dict_t *auth_modules)
{
	int32_t dummy;

	dict_foreach (auth_modules, fini, &dummy);
}