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
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
|
/*
* Portions Copyright 1998 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Copyright (c) 1993 Regents of the University of Michigan.
* All rights reserved.
*
* kbind.c
*/
#ifndef lint
static char copyright[] = "@(#) Copyright (c) 1993 Regents of the University of Michigan.\nAll rights reserved.\n";
#endif
#ifdef KERBEROS
#include <stdio.h>
#include <string.h>
#ifdef MACOS
#include <stdlib.h>
#include "macos.h"
#else /* MACOS */
#ifdef DOS
#include "msdos.h"
#endif /* DOS */
#include <krb.h>
#include <stdlib.h>
#if !defined(DOS) && !defined( _WIN32 )
#include <sys/types.h>
#endif /* !DOS && !_WIN32 */
#include <sys/time.h>
#include <sys/socket.h>
#endif /* MACOS */
#include "lber.h"
#include "ldap.h"
#include "ldap-private.h"
#include "ldap-int.h"
/*
* ldap_kerberos_bind1 - initiate a bind to the ldap server using
* kerberos authentication. The dn is supplied. It is assumed the user
* already has a valid ticket granting ticket. The msgid of the
* request is returned on success (suitable for passing to ldap_result()),
* -1 is returned if there's trouble.
*
* Example:
* ldap_kerberos_bind1( ld, "cn=manager, o=university of michigan, c=us" )
*/
int
ldap_kerberos_bind1( LDAP *ld, char *dn )
{
BerElement *ber;
char *cred;
int rc, credlen;
char *get_kerberosv4_credentials();
#ifdef STR_TRANSLATION
int str_translation_on;
#endif /* STR_TRANSLATION */
/*
* The bind request looks like this:
* BindRequest ::= SEQUENCE {
* version INTEGER,
* name DistinguishedName,
* authentication CHOICE {
* krbv42ldap [1] OCTET STRING
* krbv42dsa [2] OCTET STRING
* }
* }
* all wrapped up in an LDAPMessage sequence.
*/
#if defined( SUN ) && defined( _REENTRANT )
int rv;
LOCK_LDAP(ld);
#endif
Debug( LDAP_DEBUG_TRACE, catgets(slapdcat, 1, 186, "ldap_kerberos_bind1\n"), 0, 0, 0 );
if ( dn == NULL )
dn = "";
if ( (cred = get_kerberosv4_credentials( ld, dn, "ldapserver",
&credlen )) == NULL ) {
#if defined( SUN ) && defined( _REENTRANT )
UNLOCK_LDAP(ld);
#endif
return( -1 ); /* ld_errno should already be set */
}
/* create a message to send */
if ( (ber = alloc_ber_with_options( ld )) == NULLBER ) {
free( cred );
#if defined( SUN ) && defined( _REENTRANT )
UNLOCK_LDAP(ld);
#endif
return( -1 );
}
#ifdef STR_TRANSLATION
if (( str_translation_on = (( ber->ber_options &
LBER_TRANSLATE_STRINGS ) != 0 ))) { /* turn translation off */
ber->ber_options &= ~LBER_TRANSLATE_STRINGS;
}
#endif /* STR_TRANSLATION */
/* fill it in */
rc = ber_printf( ber, "{it{isto}}", ++ld->ld_msgid, LDAP_REQ_BIND,
ld->ld_version, dn, LDAP_AUTH_KRBV41, cred, credlen );
#ifdef STR_TRANSLATION
if ( str_translation_on ) { /* restore translation */
ber->ber_options |= LBER_TRANSLATE_STRINGS;
}
#endif /* STR_TRANSLATION */
if ( rc == -1 ) {
free( cred );
ber_free( ber, 1 );
ld->ld_errno = LDAP_ENCODING_ERROR;
#if defined( SUN ) && defined( _REENTRANT )
UNLOCK_LDAP(ld);
#endif
return( -1 );
}
free( cred );
#ifndef NO_CACHE
if ( ld->ld_cache != NULL ) {
ldap_flush_cache( ld );
}
#endif /* !NO_CACHE */
/* send the message */
#if defined( SUN ) && defined( _REENTRANT )
rv = send_initial_request( ld, LDAP_REQ_BIND, dn, ber );
UNLOCK_LDAP(ld);
return ( rv );
#else
return ( send_initial_request( ld, LDAP_REQ_BIND, dn, ber ));
#endif
}
int
ldap_kerberos_bind1_s( LDAP *ld, char *dn )
{
int msgid;
LDAPMessage *res;
Debug( LDAP_DEBUG_TRACE, catgets(slapdcat, 1, 187, "ldap_kerberos_bind1_s\n"), 0, 0, 0 );
/* initiate the bind */
if ( (msgid = ldap_kerberos_bind1( ld, dn )) == -1 )
return( ld->ld_errno );
/* wait for a result */
if ( ldap_result( ld, ld->ld_msgid, 1, (struct timeval *) 0, &res )
== -1 ) {
return( ld->ld_errno ); /* ldap_result sets ld_errno */
}
return( ldap_result2error( ld, res, 1 ) );
}
/*
* ldap_kerberos_bind2 - initiate a bind to the X.500 server using
* kerberos authentication. The dn is supplied. It is assumed the user
* already has a valid ticket granting ticket. The msgid of the
* request is returned on success (suitable for passing to ldap_result()),
* -1 is returned if there's trouble.
*
* Example:
* ldap_kerberos_bind2( ld, "cn=manager, o=university of michigan, c=us" )
*/
int
ldap_kerberos_bind2( LDAP *ld, char *dn )
{
BerElement *ber;
char *cred;
int rc, credlen;
char *get_kerberosv4_credentials();
#ifdef STR_TRANSLATION
int str_translation_on;
#endif /* STR_TRANSLATION */
#if defined( SUN ) && defined( _REENTRANT )
int rv;
LOCK_LDAP(ld);
#endif
Debug( LDAP_DEBUG_TRACE, catgets(slapdcat, 1, 188, "ldap_kerberos_bind2\n"), 0, 0, 0 );
if ( dn == NULL )
dn = "";
if ( (cred = get_kerberosv4_credentials( ld, dn, "x500dsa", &credlen ))
== NULL ) {
#if defined( SUN ) && defined( _REENTRANT )
UNLOCK_LDAP(ld);
#endif
return( -1 ); /* ld_errno should already be set */
}
/* create a message to send */
if ( (ber = alloc_ber_with_options( ld )) == NULLBER ) {
free( cred );
#if defined( SUN ) && defined( _REENTRANT )
UNLOCK_LDAP(ld);
#endif
return( -1 );
}
#ifdef STR_TRANSLATION
if (( str_translation_on = (( ber->ber_options &
LBER_TRANSLATE_STRINGS ) != 0 ))) { /* turn translation off */
ber->ber_options &= ~LBER_TRANSLATE_STRINGS;
}
#endif /* STR_TRANSLATION */
/* fill it in */
rc = ber_printf( ber, "{it{isto}}", ++ld->ld_msgid, LDAP_REQ_BIND,
ld->ld_version, dn, LDAP_AUTH_KRBV42, cred, credlen );
#ifdef STR_TRANSLATION
if ( str_translation_on ) { /* restore translation */
ber->ber_options |= LBER_TRANSLATE_STRINGS;
}
#endif /* STR_TRANSLATION */
free( cred );
if ( rc == -1 ) {
ber_free( ber, 1 );
ld->ld_errno = LDAP_ENCODING_ERROR;
#if defined( SUN ) && defined( _REENTRANT )
UNLOCK_LDAP(ld);
#endif
return( -1 );
}
/* send the message */
#if defined( SUN ) && defined( _REENTRANT )
rv = send_initial_request( ld, LDAP_REQ_BIND, dn, ber );
UNLOCK_LDAP(ld);
return ( rv );
#endif
return ( send_initial_request( ld, LDAP_REQ_BIND, dn, ber ));
}
/* synchronous bind to DSA using kerberos */
int
ldap_kerberos_bind2_s( LDAP *ld, char *dn )
{
int msgid;
LDAPMessage *res;
Debug( LDAP_DEBUG_TRACE, catgets(slapdcat, 1, 189, "ldap_kerberos_bind2_s\n"), 0, 0, 0 );
/* initiate the bind */
if ( (msgid = ldap_kerberos_bind2( ld, dn )) == -1 )
return( ld->ld_errno );
/* wait for a result */
if ( ldap_result( ld, ld->ld_msgid, 1, (struct timeval *) 0, &res )
== -1 ) {
return( ld->ld_errno ); /* ldap_result sets ld_errno */
}
return( ldap_result2error( ld, res, 1 ) );
}
/* synchronous bind to ldap and DSA using kerberos */
int
ldap_kerberos_bind_s( LDAP *ld, char *dn )
{
int err;
Debug( LDAP_DEBUG_TRACE, catgets(slapdcat, 1, 190, "ldap_kerberos_bind_s\n"), 0, 0, 0 );
if ( (err = ldap_kerberos_bind1_s( ld, dn )) != LDAP_SUCCESS )
return( err );
return( ldap_kerberos_bind2_s( ld, dn ) );
}
#ifndef AUTHMAN
/*
* get_kerberosv4_credentials - obtain kerberos v4 credentials for ldap.
* The dn of the entry to which to bind is supplied. It's assumed the
* user already has a tgt.
*/
char *
get_kerberosv4_credentials( LDAP *ld, char *who, char *service, int *len )
{
KTEXT_ST ktxt;
int err;
char realm[REALM_SZ], *cred, *krbinstance;
Debug( LDAP_DEBUG_TRACE, catgets(slapdcat, 1, 191, "get_kerberosv4_credentials\n"), 0, 0, 0 );
if ( (err = krb_get_tf_realm( tkt_string(), realm )) != KSUCCESS ) {
#ifndef NO_USERINTERFACE
fprintf( stderr, "krb_get_tf_realm failed (%s)\n",
krb_err_txt[err] );
#endif /* NO_USERINTERFACE */
ld->ld_errno = LDAP_INVALID_CREDENTIALS;
return( NULL );
}
#ifdef LDAP_REFERRALS
krbinstance = ld->ld_defconn->lconn_krbinstance;
#else /* LDAP_REFERRALS */
krbinstance = ld->ld_host;
#endif /* LDAP_REFERRALS */
if ( (err = krb_mk_req( &ktxt, service, krbinstance, realm, 0 ))
!= KSUCCESS ) {
#ifndef NO_USERINTERFACE
fprintf( stderr, "krb_mk_req failed (%s)\n", krb_err_txt[err] );
#endif /* NO_USERINTERFACE */
ld->ld_errno = LDAP_INVALID_CREDENTIALS;
return( NULL );
}
if ( ( cred = malloc( ktxt.length )) == NULL ) {
ld->ld_errno = LDAP_NO_MEMORY;
return( NULL );
}
*len = ktxt.length;
memcpy( cred, ktxt.dat, ktxt.length );
return( cred );
}
#endif /* !AUTHMAN */
#endif /* KERBEROS */
|
