summaryrefslogtreecommitdiffstats
path: root/ldap/servers/plugins/passthru/ptpreop.c
blob: 86d83fb7d8ccedfcf5df5d6a8183c59598ee13db (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
279
280
281
282
283
284
285
286
287
288
289
/** BEGIN COPYRIGHT BLOCK
 * 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; version 2 of the License.
 * 
 * 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, write to the Free Software Foundation, Inc., 59 Temple
 * Place, Suite 330, Boston, MA 02111-1307 USA.
 * 
 * In addition, as a special exception, Red Hat, Inc. gives You the additional
 * right to link the code of this Program with code not covered under the GNU
 * General Public License ("Non-GPL Code") and to distribute linked combinations
 * including the two, subject to the limitations in this paragraph. Non-GPL Code
 * permitted under this exception must only link to the code of this Program
 * through those well defined interfaces identified in the file named EXCEPTION
 * found in the source code files (the "Approved Interfaces"). The files of
 * Non-GPL Code may instantiate templates or use macros or inline functions from
 * the Approved Interfaces without causing the resulting work to be covered by
 * the GNU General Public License. Only Red Hat, Inc. may make changes or
 * additions to the list of Approved Interfaces. You must obey the GNU General
 * Public License in all respects for all of the Program code and other code used
 * in conjunction with the Program except the Non-GPL Code covered by this
 * exception. If you modify this file, you may extend this exception to your
 * version of the file, but you are not obligated to do so. If you do not wish to
 * provide this exception without modification, you must delete this exception
 * statement from your version and license this file solely under the GPL without
 * exception. 
 * 
 * 
 * Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
 * Copyright (C) 2005 Red Hat, Inc.
 * All rights reserved.
 * END COPYRIGHT BLOCK **/

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

/*
 * ptpreop.c - bind pre-operation plugin for Pass Through Authentication
 *
 */

#include "passthru.h"

static Slapi_PluginDesc pdesc = { "passthruauth",  PLUGIN_MAGIC_VENDOR_STR, PRODUCTTEXT,
	"pass through authentication plugin" };

/*
 * function prototypes
 */
static int passthru_bindpreop( Slapi_PBlock *pb );
static int passthru_bindpreop_start( Slapi_PBlock *pb );
static int passthru_bindpreop_close( Slapi_PBlock *pb );


/*
 * Plugin initialization function (which must be listed in the appropriate
 * slapd config file).
 */
int
passthruauth_init( Slapi_PBlock *pb )
{
    PASSTHRU_ASSERT( pb != NULL );

    slapi_log_error( SLAPI_LOG_PLUGIN, PASSTHRU_PLUGIN_SUBSYSTEM,
	    "=> passthruauth_init\n" );

    if ( slapi_pblock_set( pb, SLAPI_PLUGIN_VERSION,
		    (void *)SLAPI_PLUGIN_VERSION_01 ) != 0
	    || slapi_pblock_set( pb, SLAPI_PLUGIN_DESCRIPTION,
		    (void *)&pdesc ) != 0
	    || slapi_pblock_set( pb, SLAPI_PLUGIN_START_FN,
		    (void *)passthru_bindpreop_start ) != 0
	    || slapi_pblock_set( pb, SLAPI_PLUGIN_PRE_BIND_FN,
		    (void *)passthru_bindpreop ) != 0
	    || slapi_pblock_set( pb, SLAPI_PLUGIN_CLOSE_FN,
		    (void *)passthru_bindpreop_close ) != 0  ) {
	slapi_log_error( SLAPI_LOG_FATAL, PASSTHRU_PLUGIN_SUBSYSTEM,
		"passthruauth_init failed\n" );
	return( -1 );
    }

    slapi_log_error( SLAPI_LOG_PLUGIN, PASSTHRU_PLUGIN_SUBSYSTEM,
	"<= passthruauth_init succeeded\n" );

    return( 0 );
}


/*
 * passthru_bindpreop_start() is called before the directory server
 * is fully up.  We parse our configuration and initialize any mutexes, etc.
 */
static int
passthru_bindpreop_start( Slapi_PBlock *pb )
{
    int		argc, rc;
    char	**argv;

    PASSTHRU_ASSERT( pb != NULL );

    slapi_log_error( SLAPI_LOG_PLUGIN, PASSTHRU_PLUGIN_SUBSYSTEM,
	    "=> passthru_bindpreop_start\n" );

    if ( slapi_pblock_get( pb, SLAPI_PLUGIN_ARGC, &argc ) != 0 ||
	    slapi_pblock_get( pb, SLAPI_PLUGIN_ARGV, &argv ) != 0 ) {
	slapi_log_error( SLAPI_LOG_FATAL, PASSTHRU_PLUGIN_SUBSYSTEM,
		"unable to get arguments\n" );
	return( -1 );
    }

    if (( rc = passthru_config( argc, argv )) != LDAP_SUCCESS ) {
	slapi_log_error( SLAPI_LOG_FATAL, PASSTHRU_PLUGIN_SUBSYSTEM,
		"configuration failed (%s)\n", ldap_err2string( rc ));
	return( -1 );
    }

    return( 0 );
}


/*
 * Called right before the Directory Server shuts down.
 */
static int
passthru_bindpreop_close( Slapi_PBlock *pb )
{
    PASSTHRU_ASSERT( pb != NULL );

    slapi_log_error( SLAPI_LOG_PLUGIN, PASSTHRU_PLUGIN_SUBSYSTEM,
	    "=> passthru_bindpreop_close\n" );

    /*
     * close all our open connections.
     * XXXmcs: free any memory, mutexes, etc.
     */
    passthru_close_all_connections( passthru_get_config() );

    return( 0 );
}


static int
passthru_bindpreop( Slapi_PBlock *pb )
{
    int			rc, method;
    char		*normbinddn, *matcheddn;
    char		*libldap_errmsg, *pr_errmsg, *errmsg;
    PassThruConfig	*cfg;
    PassThruServer	*srvr;
    struct berval	*creds, **urls;
    LDAPControl		**reqctrls, **resctrls;

    PASSTHRU_ASSERT( pb != NULL );

    slapi_log_error( SLAPI_LOG_PLUGIN, PASSTHRU_PLUGIN_SUBSYSTEM,
	    "=> passthru_bindpreop\n" );

    /*
     * retrieve parameters for bind operation
     */
    if ( slapi_pblock_get( pb, SLAPI_BIND_METHOD, &method ) != 0 ||
	    slapi_pblock_get( pb, SLAPI_BIND_TARGET, &normbinddn ) != 0 ||
	    slapi_pblock_get( pb, SLAPI_BIND_CREDENTIALS, &creds ) != 0 ) {
	slapi_log_error( SLAPI_LOG_FATAL, PASSTHRU_PLUGIN_SUBSYSTEM,
		"<= not handled (unable to retrieve bind parameters)\n" );
	return( PASSTHRU_OP_NOT_HANDLED );
    }
    if ( normbinddn == NULL ) {
	normbinddn = "";
    }

    /*
     * We only handle simple bind requests that include non-NULL binddn and
     * credentials.  Let the Directory Server itself handle everything else.
     */
    if ( method != LDAP_AUTH_SIMPLE || *normbinddn == '\0'
	    || creds->bv_len == 0 ) {
	slapi_log_error( SLAPI_LOG_PLUGIN, PASSTHRU_PLUGIN_SUBSYSTEM,
		"<= not handled (not simple bind or NULL dn/credentials)\n" );
	return( PASSTHRU_OP_NOT_HANDLED );
    }

    /*
     * Get pass through authentication configuration.
     */
    cfg = passthru_get_config();

    /*
     * Check to see if the target DN is one we should "pass through" to
     * another server.
     */
    if ( passthru_dn2server( cfg, normbinddn, &srvr ) != LDAP_SUCCESS ) {
	slapi_log_error( SLAPI_LOG_PLUGIN, PASSTHRU_PLUGIN_SUBSYSTEM,
		"<= not handled (not one of our suffixes)\n" );
	return( PASSTHRU_OP_NOT_HANDLED );
    }

    /*
     * We are now committed to handling this bind request.
     * Chain it off to another server.
     */
    matcheddn = errmsg = libldap_errmsg = pr_errmsg = NULL;
    urls = NULL;
    resctrls = NULL;
    if ( slapi_pblock_get( pb, SLAPI_REQCONTROLS, &reqctrls ) != 0 ) {
	rc = LDAP_OPERATIONS_ERROR;
	errmsg = "unable to retrieve bind controls";
	slapi_log_error( SLAPI_LOG_FATAL, PASSTHRU_PLUGIN_SUBSYSTEM, "%s\n",
		errmsg );
    } else {
	int	lderrno;

	if (( rc = passthru_simple_bind_s( pb, srvr, PASSTHRU_CONN_TRIES,
		normbinddn, creds, reqctrls, &lderrno, &matcheddn,
		&libldap_errmsg, &urls, &resctrls )) == LDAP_SUCCESS ) {
	    rc = lderrno;
	    errmsg = libldap_errmsg;
	} else if ( rc != LDAP_USER_CANCELLED ) {	/* not abandoned */
	    PRErrorCode	prerr = PR_GetError();
	    pr_errmsg = PR_smprintf( "error %d - %s %s ("
		    SLAPI_COMPONENT_NAME_NSPR " error %d - %s)",
		    rc, ldap_err2string( rc ), srvr->ptsrvr_url,
		    prerr, slapd_pr_strerror(prerr));
	    if ( NULL != pr_errmsg ) {
		errmsg = pr_errmsg;
	    } else {
		errmsg = ldap_err2string( rc );
	    }
	    rc = LDAP_OPERATIONS_ERROR;
	}
    }

    /*
     * If bind succeeded, change authentication information associated
     * with this connection.
     */
    if ( rc == LDAP_SUCCESS ) {
        char *ndn = slapi_ch_strdup( normbinddn );
        if (slapi_pblock_set(pb, SLAPI_CONN_DN, ndn) != 0 ||
	    slapi_pblock_set(pb, SLAPI_CONN_AUTHMETHOD,
                             SLAPD_AUTH_SIMPLE) != 0) {
            slapi_ch_free((void **)&ndn);
            rc = LDAP_OPERATIONS_ERROR;
            errmsg = "unable to set connection DN or AUTHTYPE";
            slapi_log_error( SLAPI_LOG_FATAL, PASSTHRU_PLUGIN_SUBSYSTEM,
                             "%s\n", errmsg );
        }
    }

    if ( rc != LDAP_USER_CANCELLED ) {	/* not abandoned */
	/*
	 * Send a result to our client.
	 */
	if ( resctrls != NULL ) {
	    (void)slapi_pblock_set( pb, SLAPI_RESCONTROLS, resctrls );
	}
	slapi_send_ldap_result( pb, rc, matcheddn, errmsg, 0, urls );
    }

    /*
     * Clean up -- free allocated memory, etc.
     */
    if ( urls != NULL ) {
	passthru_free_bervals( urls );
    }
    if ( libldap_errmsg != NULL ) {
	ldap_memfree( errmsg );
    }
    if ( pr_errmsg != NULL ) {
	PR_smprintf_free( pr_errmsg );
    }
    if ( resctrls != NULL ) {
	ldap_controls_free( resctrls );
    }
    if ( matcheddn != NULL ) {
	ldap_memfree( matcheddn );
    }
 
    slapi_log_error( SLAPI_LOG_PLUGIN, PASSTHRU_PLUGIN_SUBSYSTEM,
	    "<= handled (error %d - %s)\n", rc, ldap_err2string( rc ));

    return( PASSTHRU_OP_HANDLED );
}