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[hcoop/zz_old/modwaklog.git] / mod_waklog.c
1 #define _LARGEFILE64_SOURCE
2 #define _GNU_SOURCE
3
4 #include "httpd.h"
5 #include "http_config.h"
6 #include "http_log.h"
7 #include "http_protocol.h"
8 #include "http_request.h"
9 #include "http_core.h"
10
11 #ifdef sun
12 #include <synch.h>
13 #elif linux
14 #define use_pthreads
15 #include <features.h>
16 #include <sys/types.h>
17 #include <sys/mman.h>
18 #include <pthread.h>
19 #else
20 #error "make sure you include the right stuff here"
21 #endif
22
23 #ifndef MAXNAMELEN
24 #define MAXNAMELEN 1024
25 #endif
26
27 #ifdef STANDARD20_MODULE_STUFF
28 #define APACHE2
29 #endif
30
31 /********************* APACHE1 ******************************************************************************/
32 #ifndef APACHE2
33 #include "ap_config.h"
34 #if defined(sun)
35 #include <sys/ioccom.h>
36 #endif /* sun */
37 #include <http_conf_globals.h>
38 #define MK_POOL pool
39 #define MK_TABLE_GET ap_table_get
40 #define MK_TABLE_SET ap_table_set
41 #define command(name, func, var, type, usage) \
42 { name, func, \
43 NULL , \
44 RSRC_CONF | ACCESS_CONF , type, usage }
45 module waklog_module;
46
47 /********************* APACHE2 ******************************************************************************/
48 #else
49 #include <apr_strings.h>
50 #include <apr_base64.h>
51 #define ap_pcalloc apr_pcalloc
52 #define ap_pdupstr apr_pdupstr
53 #define ap_pstrdup apr_pstrdup
54 #define MK_POOL apr_pool_t
55 #define MK_TABLE_GET apr_table_get
56 #define MK_TABLE_SET apr_table_set
57 #include "unixd.h"
58 extern unixd_config_rec unixd_config;
59 #define ap_user_id unixd_config.user_id
60 #define ap_group_id unixd_config.group_id
61 #define ap_user_name unixd_config.user_name
62 #define command(name, func, var, type, usage) \
63 AP_INIT_ ## type (name, (void*) func, \
64 NULL, \
65 RSRC_CONF | ACCESS_CONF, usage)
66 module AP_MODULE_DECLARE_DATA waklog_module;
67 typedef struct { int dummy; } child_info;
68 const char *userdata_key = "waklog_init";
69
70 #endif /* APACHE2 */
71 /**************************************************************************************************/
72
73 #include <krb5.h>
74 #include <stropts.h>
75 #include <afs/venus.h>
76 #include <afs/auth.h>
77 #include <afs/dirpath.h>
78 #include <afs/ptuser.h>
79 #include <rx/rxkad.h>
80
81 #define TKT_LIFE ( 12 * 60 * 60 )
82 #define SLEEP_TIME ( TKT_LIFE - 5*60 )
83
84 #define WAKLOG_ON 1
85 #define WAKLOG_OFF 2
86 #define WAKLOG_UNSET 0
87
88 #ifdef WAKLOG_DEBUG
89 #undef APLOG_DEBUG
90 #define APLOG_DEBUG APLOG_ERR
91 #endif
92
93 /* this is used to turn off pag generation for the backround worker child during startup */
94 int pag_for_children = 1;
95
96 typedef struct
97 {
98 int forked;
99 int configured;
100 int protect;
101 int usertokens;
102 int cell_in_principal;
103 int disable_token_cache;
104 char *keytab;
105 char *principal;
106 char *default_principal;
107 char *default_keytab;
108 char *afs_cell;
109 char *path;
110 MK_POOL *p;
111 }
112 waklog_config;
113
114 typedef struct
115 {
116 struct ktc_token token;
117 char clientprincipal[MAXNAMELEN];
118 krb5_context kcontext;
119 krb5_ccache ccache;
120 struct ktc_principal server;
121 struct ktc_principal client;
122 int pr_init;
123 } waklog_child_config;
124
125 waklog_child_config child;
126
127 struct tokencache_ent {
128 char clientprincipal[MAXNAMELEN];
129 struct ktc_token token;
130 struct ktc_principal client;
131 struct ktc_principal server;
132 time_t lastused;
133 int persist;
134 };
135
136 #define SHARED_TABLE_SIZE 512
137
138 struct sharedspace_s {
139 int renewcount;
140 struct tokencache_ent sharedtokens[SHARED_TABLE_SIZE];
141 };
142
143 struct sharedspace_s *sharedspace = NULL;
144
145 struct renew_ent {
146 char *keytab;
147 char *principal;
148 int lastrenewed;
149 };
150
151 #ifdef use_pthreads
152 pthread_rwlock_t *sharedlock = NULL;
153 #else
154 rwlock_t *sharedlock = NULL;
155 #endif
156
157 struct renew_ent renewtable[SHARED_TABLE_SIZE];
158
159 int renewcount = 0;
160
161
162
163 #define getModConfig(P, X) P = (waklog_config *) ap_get_module_config( (X)->module_config, &waklog_module );
164
165 #include <krb5.h>
166
167 #if defined(sun)
168 #include <sys/ioccom.h>
169 #endif /* sun */
170 #include <stropts.h>
171 #include <afs/venus.h>
172 #include <afs/auth.h>
173 #include <afs/dirpath.h>
174 #include <afs/ptuser.h>
175 #include <rx/rxkad.h>
176
177
178 static void
179 log_error (const char *file, int line, int level, int status,
180 const server_rec * s, const char *fmt, ...)
181 {
182 char errstr[4096];
183 va_list ap;
184
185 va_start (ap, fmt);
186 vsnprintf (errstr, 1024, fmt, ap);
187 va_end (ap);
188
189 #ifdef APACHE2
190 ap_log_error (file, line, level | APLOG_NOERRNO, status, s, "(%d) %s", getpid(), errstr);
191 #else
192 ap_log_error (file, line, level | APLOG_NOERRNO, s, "(%d) %s", getpid(), errstr);
193 #endif
194
195 }
196
197 waklog_config *retrieve_config(request_rec *r) {
198
199 request_rec *my;
200 waklog_config *cfg;
201
202 if ( r && r->main ) {
203 my = r->main;
204 } else if (r) {
205 my = r;
206 } else {
207 return NULL;
208 }
209
210 if ( my && ( cfg = (waklog_config *) ap_get_module_config(my->per_dir_config, &waklog_module ) ) ) {
211 return cfg;
212 } else {
213 getModConfig (cfg, r->server);
214 }
215
216 return cfg;
217
218 }
219
220 /* set_auth -- sets the tokens of the current process to this user.
221 if "self" is set, it divines the user from the current requests' environment.
222 otherwise, it's gettng it from principal/keytab */
223
224 int
225 set_auth ( server_rec *s, request_rec *r, int self, char *principal, char *keytab, int storeonly ) {
226
227 int i;
228 int usecached = 0;
229 krb5_error_code kerror = 0;
230 krb5_principal kprinc = NULL;
231 krb5_get_init_creds_opt kopts;
232 krb5_creds v5creds;
233 krb5_creds increds;
234 struct ktc_principal server = { "afs", "", "" };
235 struct ktc_principal client;
236 struct ktc_token token;
237 krb5_creds *v5credsp = NULL;
238 krb5_keytab krb5kt = NULL;
239 char buf[MAXNAMELEN];
240 waklog_config *cfg;
241 int rc = 0;
242 int buflen = 0;
243 time_t oldest_time = 0;
244 int oldest;
245 int stored = -1;
246 time_t mytime;
247 int indentical;
248 int cell_in_principal;
249 int attempt;
250 int use_client_credentials = 0;
251
252 char k5user[MAXNAMELEN];
253 char *k5secret;
254 char *k5path = NULL;
255
256 k5path = !r ? NULL : MK_TABLE_GET( r->subprocess_env, "KRB5CCNAME" );
257
258 memset((char *) &increds, 0, sizeof(increds));
259 /* init some stuff if it ain't already */
260
261 if ( ! child.kcontext ) {
262 kerror = krb5_init_context(&child.kcontext);
263 }
264
265 if (!k5path || !*k5path) {
266 k5path = "MEMORY:tmpcache";
267 }
268 if ( ( ! child.ccache ) && ( kerror = krb5_cc_resolve(child.kcontext, k5path, &child.ccache) ) ) {
269 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: can't initialize credentials cache %s err=%d",
270 k5path, kerror );
271 }
272
273 log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: set_auth: %d, %s, %s, %d, KRB5CC=%s",
274 self, principal ? principal : "NULL",
275 keytab ? keytab : "NULL", storeonly, k5path ? k5path : "NULL");
276
277 /* pull the server config record that we care about... */
278
279 if ( r ) {
280 cfg = retrieve_config(r);
281 } else {
282 log_error (APLOG_MARK, APLOG_DEBUG, 0, s,
283 "mod_waklog: set_auth using no config" );
284 getModConfig (cfg, s);
285 }
286
287 if ( ! cfg ) {
288 log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: cfg is %d", cfg );
289 }
290
291 #ifdef APACHE2
292 if ( self ) {
293 /* pull out our principal name and stuff from the environment -- webauth better have sent
294 through. This here is also where you'd suck stuff out of KRB5CCNAME if we were
295 using something like Cosign */
296
297 if ( ! ( r && r->connection && r->user )) {
298 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: self authentication selected, but no data available");
299 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: r->user=%s", (r->user==NULL ? "null" : r->user==NULL));
300 return -1;
301 }
302
303 strncpy(k5user, r->user, sizeof(k5user));
304
305 /* the other thing we need is someone's password */
306 if ( ! ( k5secret = (char *) MK_TABLE_GET( r->notes, "ATTR_PASSWORD" ) ) ) {
307 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: cant do self auth without a secret");
308 return -1;
309 }
310
311 /* we'll pick this up later after we've checked the cache and current state */
312
313 } else
314 #endif
315 if (r && r->user) {
316 strncpy(k5user, r->user, sizeof(k5user));
317 keytab = NULL;
318 } else if ( principal ) {
319 strncpy( k5user, principal, sizeof(k5user));
320 }
321
322 log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: set_auth: k5user=%s", k5user ? k5user : "NULL");
323 mytime = time(0);
324
325 /* see if we should just go ahead and ignore this call, since we already should be set to these
326 credentials */
327
328 if ( ! storeonly ) {
329
330 #ifdef use_pthreads
331 pthread_rwlock_rdlock( sharedlock );
332 #else
333 rw_rdlock( sharedlock );
334 #endif
335
336 for ( i = 0; i < SHARED_TABLE_SIZE; ++i ) {
337
338 /* if it's a token for the principal we're looking for, and it hasn't expired yet */
339
340 if ( ( !strcmp( k5user,
341 sharedspace->sharedtokens[i].clientprincipal ) ) &&
342 ( sharedspace->sharedtokens[i].token.endTime > mytime ) ) {
343
344 if ( ! memcmp(&child.token, &sharedspace->sharedtokens[i].token, sizeof(child.token) ) ) {
345 indentical = 1;
346 } else {
347 indentical = 0;
348 }
349
350 /* copy the token out of the cache and into the child object */
351
352 strcpy(child.clientprincipal, sharedspace->sharedtokens[i].clientprincipal );
353 memcpy(&child.token, &sharedspace->sharedtokens[i].token, sizeof(child.token));
354 memcpy(&child.server, &sharedspace->sharedtokens[i].server, sizeof(child.server));
355 memcpy(&child.client, &sharedspace->sharedtokens[i].client, sizeof(child.client));
356
357 /* set our last used time thing */
358 sharedspace->sharedtokens[i].lastused = mytime;
359
360 usecached = 1;
361
362 break;
363
364 }
365
366 }
367
368 /* release the lock on the token cache */
369 #ifdef use_pthreads
370 pthread_rwlock_unlock( sharedlock );
371 #else
372 rw_unlock( sharedlock );
373 #endif
374
375 if ( usecached ) {
376 /* release the lock on the token cache */
377 log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
378 "mod_waklog: set_auth using shared token %d for %s", i, k5user );
379
380 }
381
382 /* if this is something that was in the cache, and it's the same as the token we already have stored,
383 and we weren't calling this just to renew it... */
384
385 if ( usecached && indentical ) {
386 log_error (APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: token is identical for %s", k5user );
387 return 0;
388 }
389
390 }
391
392 /* if 'usecached' isn't set, we've got to get our tokens from somewhere... */
393 if (( ! usecached ) && ( k5user )) {
394
395 /* clear out the creds structure */
396 memset((void *) &v5creds, 0, sizeof(v5creds));
397
398 /* create a principal out of our k5user string */
399
400 if ( kerror = krb5_parse_name (child.kcontext, k5user, &kprinc ) ) {
401 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: krb5_parse_name %s", (char *) error_message(kerror) );
402 goto cleanup;
403 }
404
405 /* create the credentials options */
406
407 krb5_get_init_creds_opt_init ( &kopts );
408 krb5_get_init_creds_opt_set_tkt_life ( &kopts, TKT_LIFE );
409 krb5_get_init_creds_opt_set_renew_life ( &kopts, 0 );
410 krb5_get_init_creds_opt_set_forwardable ( &kopts, 0 );
411 krb5_get_init_creds_opt_set_proxiable ( &kopts, 0 );
412
413 if ( keytab ) {
414
415 /* if we've been passed a keytab, we're going to be getting our credentials from it */
416
417 log_error( APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: using keytab %s", keytab);
418
419 if ( kerror = krb5_kt_resolve(child.kcontext, keytab, &krb5kt ) ) {
420 log_error( APLOG_MARK, APLOG_ERR, 0, s,
421 "mod_waklog: krb5_kt_resolve %s", error_message(kerror) );
422 goto cleanup;
423 }
424
425 if ((kerror = krb5_get_init_creds_keytab (child.kcontext, &v5creds,
426 kprinc, krb5kt, 0, NULL, &kopts ) ) ) {
427 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: krb5_get_init_creds_keytab %s",
428 error_message(kerror) );
429 goto cleanup;
430 }
431
432 } else if ( self ) {
433
434 /* if 'self' is set, we're going to use the credentials provided in the credential information */
435 /* if you're using CoSign, you'd actually just set the ccache to the KRB5CCNAME credentials */
436 /* and skip ahead... Our WebSSO is lame, but has a way for us to snarf the password out of */
437 /* the encrypted token for proxy-authentication stuff. We only hand out keys that allow this */
438 /* functionality to VERY special people. */
439
440 if ((kerror = krb5_get_init_creds_password ( child.kcontext, &v5creds,
441 kprinc, k5secret, NULL, NULL, 0, NULL, &kopts ) ) ) {
442 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: krb5_get_init_creds_password %s",
443 error_message(kerror) );
444 /* nuke the password so it doesn't end up in core files */
445 memset(k5secret, 0, sizeof(k5secret));
446 goto cleanup;
447 }
448
449 memset(k5secret, 0, sizeof(k5secret));
450
451 } else {
452 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: no keytab, no self; assuming mod_auth_kerb or similar");
453 use_client_credentials = 1;
454 }
455
456 /* initialize the credentials cache and store the stuff we just got */
457 if (!use_client_credentials) {
458 if ( kerror = krb5_cc_initialize (child.kcontext, child.ccache, kprinc)) {
459 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: init credentials cache %s",
460 error_message(kerror));
461 goto cleanup;
462 }
463
464 if ( kerror = krb5_cc_store_cred(child.kcontext, child.ccache, &v5creds) ) {
465 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: cannot store credentials %s",
466 error_message(kerror));
467 goto cleanup;
468 }
469 }
470
471 krb5_free_cred_contents(child.kcontext, &v5creds);
472
473 if ( kerror ) {
474 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: store cred %s", error_message(kerror));
475 goto cleanup;
476 }
477
478 log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: kinit ok for %s", k5user );
479
480 /* now, to the 'aklog' portion of our program. */
481
482 strncpy( buf, "afs", sizeof(buf) - 1 );
483
484 /** we make two attempts here, one for afs@REALM and one for afs/cell@REALM */
485 for(attempt = 0; attempt <= 1; attempt++) {
486 cell_in_principal = (cfg->cell_in_principal + attempt) % 2;
487
488 log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: cell_in_principal=%d", cell_in_principal );
489 if (cell_in_principal) {
490 strncat(buf, "/", sizeof(buf) - strlen(buf) - 1);
491 strncat(buf, cfg->afs_cell, sizeof(buf) - strlen(buf) - 1);
492 }
493
494 log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: using AFS principal: %s", buf);
495
496 if ((kerror = krb5_parse_name (child.kcontext, buf, &increds.server))) {
497 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: krb5_parse name %s", error_message(kerror));
498 goto cleanup;
499 }
500
501 if (use_client_credentials) {
502 if (( kerror = krb5_cc_resolve( child.kcontext, k5path, &child.ccache)) != 0 ) {
503 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: krb5_cc_resolve %s", error_message(kerror));
504 goto cleanup;
505 }
506 }
507
508 if ((kerror = krb5_cc_get_principal(child.kcontext, child.ccache, &increds.client))) {
509 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: krb5_cc_get_princ %s", error_message(kerror));
510 goto cleanup;
511 }
512
513 log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: retrieved data from ccache for %s", k5user);
514
515 increds.times.endtime = 0;
516
517 increds.keyblock.enctype = ENCTYPE_DES_CBC_CRC;
518
519 if (kerror = krb5_get_credentials (child.kcontext, 0, child.ccache, &increds, &v5credsp )) {
520 /* only complain once we've tried both afs@REALM and afs/cell@REALM */
521 if (attempt>=1) {
522 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: krb5_get_credentials: %s",
523 error_message(kerror));
524 goto cleanup;
525 } else {
526 continue;
527 }
528 }
529 cfg->cell_in_principal = cell_in_principal;
530 break;
531 }
532
533 log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: get_credentials passed for %s", k5user);
534
535 if ( v5credsp->ticket.length >= MAXKTCTICKETLEN ) {
536 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: ticket size (%d) too big to fake",
537 v5credsp->ticket.length);
538 goto cleanup;
539 }
540
541 memset(&token, 0, sizeof(struct ktc_token));
542
543 token.startTime = v5credsp->times.starttime ? v5credsp->times.starttime : v5credsp->times.authtime;
544 token.endTime = v5credsp->times.endtime;
545
546 memmove( &token.sessionKey, v5credsp->keyblock.contents, v5credsp->keyblock.length);
547 token.kvno = RXKAD_TKT_TYPE_KERBEROS_V5;
548 token.ticketLen = v5credsp->ticket.length;
549 memmove( token.ticket, v5credsp->ticket.data, token.ticketLen);
550
551 /* build the name */
552
553 memmove( buf, v5credsp->client->data[0].data, min(v5credsp->client->data[0].length,
554 MAXKTCNAMELEN -1 ));
555 buf[v5credsp->client->data[0].length] = '\0';
556 if ( v5credsp->client->length > 1 ) {
557 strncat(buf, ".", sizeof(buf) - strlen(buf) - 1);
558 buflen = strlen(buf);
559 memmove(buf + buflen, v5credsp->client->data[1].data,
560 min(v5credsp->client->data[1].length,
561 MAXKTCNAMELEN - strlen(buf) - 1));
562 buf[buflen + v5credsp->client->data[1].length] = '\0';
563 }
564
565 /* assemble the client */
566 strncpy(client.name, buf, sizeof(client.name) - 1 );
567 strncpy(client.instance, "", sizeof(client.instance) - 1 );
568 memmove(buf, v5credsp->client->realm.data, min(v5credsp->client->realm.length,
569 MAXKTCNAMELEN - 1));
570 buf[v5credsp->client->realm.length] = '\0';
571 strncpy(client.cell, buf, sizeof(client.cell));
572
573 /* assemble the server's cell */
574 strncpy(server.cell, cfg->afs_cell, sizeof(server.cell) - 1);
575
576 log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: preparing to init PTS connection for %s", server.cell);
577
578 /* fill out the AFS ID in the client name */
579 /* we've done a pr_Initialize in the child_init -- once, per process. If you try to do it more
580 * strange things seem to happen. */
581
582 {
583 afs_int32 viceId = 0;
584
585 log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: making PTS call to look up %s", client.name);
586
587 if ( ( rc = pr_SNameToId( client.name, &viceId ) ) == 0 ) {
588 snprintf( client.name, sizeof(client.name), "AFS ID %d", viceId );
589 } else {
590 log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: PTS call returned error %d ", rc);
591 }
592
593 log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: PTS call returned %s ", client.name);
594
595 }
596
597 log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: server: name %s, instance %s, cell %s",
598 server.name, server.instance, server.cell );
599
600 log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: client: name %s, instance %s, cell %s",
601 client.name, client.instance, client.cell );
602
603 /* copy the resulting stuff into the child structure */
604
605 strncpy(child.clientprincipal, k5user, sizeof(child.clientprincipal));
606 memcpy(&child.token, &token, sizeof(child.token));
607 memcpy(&child.server, &server, sizeof(child.server));
608 memcpy(&child.client, &client, sizeof(child.client));
609
610 /* stuff the resulting token-related stuff into our shared token cache */
611 /* note, that anything that was set from a keytab is "persistant", and is immune
612 * from LRU-aging. This is because nothing but the process that's running as root
613 * can update these, and it's running every hour or so and renewing these tokens.
614 * and we don't want them aged out.
615 */
616
617 mytime = oldest_time = time(0);
618
619 log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: waiting for shared space for %s ", k5user);
620
621 #ifdef use_pthreads
622 pthread_rwlock_wrlock(sharedlock);
623 #else
624 rw_wrlock(sharedlock);
625 #endif
626
627 for( i = ( SHARED_TABLE_SIZE - 1 ); i >= 0; i-- ) {
628 if ( ( sharedspace->sharedtokens[i].lastused <= oldest_time) &&
629 ( sharedspace->sharedtokens[i].persist == 0 ) ) {
630 oldest = i;
631 oldest_time = sharedspace->sharedtokens[i].lastused;
632 }
633 if ( ! strcmp ( sharedspace->sharedtokens[i].clientprincipal,
634 child.clientprincipal ) ) {
635 memcpy(&sharedspace->sharedtokens[i].token, &child.token, sizeof(child.token) );
636 memcpy(&sharedspace->sharedtokens[i].client, &child.client, sizeof(child.client) );
637 memcpy(&sharedspace->sharedtokens[i].server, &child.server, sizeof(child.server) );
638 sharedspace->sharedtokens[i].lastused = mytime;
639 sharedspace->sharedtokens[i].persist = keytab ? 1 : 0;
640 stored = i;
641 break;
642 }
643 }
644
645 if ( stored == -1 ) {
646 memcpy(&sharedspace->sharedtokens[oldest].token, &child.token, sizeof(child.token) );
647 memcpy(&sharedspace->sharedtokens[oldest].client, &child.client, sizeof(child.client) );
648 memcpy(&sharedspace->sharedtokens[oldest].server, &child.server, sizeof(child.server) );
649 strcpy(sharedspace->sharedtokens[oldest].clientprincipal, child.clientprincipal );
650 sharedspace->sharedtokens[oldest].lastused = mytime;
651 sharedspace->sharedtokens[oldest].persist = keytab ? 1 : 0;
652 stored = oldest;
653 }
654
655 #ifdef use_pthreads
656 pthread_rwlock_unlock(sharedlock);
657 #else
658 rw_unlock(sharedlock);
659 #endif
660
661 log_error( APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: token stored in slot %d for %s", stored,
662 child.clientprincipal );
663
664 } else if ( ! usecached ) {
665 log_error( APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: set_auth divergent case");
666 }
667
668 if ( storeonly ) {
669 goto cleanup;
670 }
671
672 usecachedtoken:
673
674 /* don't ask. Something about AIX. We're leaving it here.*/
675 /* write(2, "", 0); */
676
677 /* we try twice, because sometimes the first one fails. Dunno why, but it always works the second time */
678
679 if ((rc = ktc_SetToken(&child.server, &child.token, &child.client, 0))) {
680 log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: settoken returned %s for %s -- trying again",
681 error_message(rc), k5user);
682 if ((rc = ktc_SetToken(&child.server, &child.token, &child.client, 0))) {
683 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: settoken2 returned %s for %s",
684 error_message(rc), k5user);
685 goto cleanup;
686 }
687 }
688
689 cleanup:
690 if ( v5credsp )
691 krb5_free_cred_contents(child.kcontext, v5credsp);
692 if ( increds.client )
693 krb5_free_principal (child.kcontext, increds.client);
694 if ( increds.server )
695 krb5_free_principal (child.kcontext, increds.server);
696 if ( krb5kt )
697 (void) krb5_kt_close(child.kcontext, krb5kt);
698 if ( kprinc )
699 krb5_free_principal (child.kcontext, kprinc);
700
701 if ( rc ) {
702 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: set_auth ending with %d", rc );
703 } else if ( kerror ) {
704 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: set_auth ending with krb5 error %d, %s", kerror, error_message(kerror));
705 } else {
706 log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: set_auth ending ok");
707 }
708
709 return kerror ? (int) kerror : (int) rc;
710
711 }
712
713
714
715 static void *
716 waklog_create_server_config (MK_POOL * p, server_rec * s)
717 {
718 waklog_config *cfg;
719
720 cfg = (waklog_config *) ap_pcalloc (p, sizeof (waklog_config));
721 cfg->p = p;
722 memset(cfg, 0, sizeof(waklog_config));
723 cfg->path = "(server)";
724 cfg->protect = WAKLOG_UNSET;
725 cfg->usertokens = WAKLOG_UNSET;
726 cfg->disable_token_cache = WAKLOG_UNSET;
727 cfg->keytab = WAKLOG_UNSET;
728 cfg->principal = WAKLOG_UNSET;
729 cfg->default_principal = WAKLOG_UNSET;
730 cfg->default_keytab = WAKLOG_UNSET;
731 cfg->afs_cell = WAKLOG_UNSET;
732 cfg->forked = 0;
733 cfg->configured = 0;
734
735 log_error (APLOG_MARK, APLOG_DEBUG, 0, s,
736 "mod_waklog: server config created.");
737
738 return (cfg);
739 }
740
741 /* initialize with host-config information */
742
743 static void *
744 waklog_create_dir_config (MK_POOL * p, char *dir)
745 {
746 waklog_config *cfg;
747
748 cfg = (waklog_config *) ap_pcalloc (p, sizeof (waklog_config));
749 memset(cfg, 0, sizeof(waklog_config));
750 cfg->p = p;
751 cfg->path = ap_pstrdup(p, dir );
752 cfg->protect = WAKLOG_UNSET;
753 cfg->usertokens = WAKLOG_UNSET;
754 cfg->disable_token_cache = WAKLOG_UNSET;
755 cfg->keytab = WAKLOG_UNSET;
756 cfg->principal = WAKLOG_UNSET;
757 cfg->default_principal = WAKLOG_UNSET;
758 cfg->default_keytab = WAKLOG_UNSET;
759 cfg->afs_cell = WAKLOG_UNSET;
760 cfg->forked = 0;
761 cfg->configured = 0;
762
763 return (cfg);
764 }
765
766 static void *waklog_merge_dir_config(MK_POOL *p, void *parent_conf, void *newloc_conf) {
767
768 waklog_config *merged = ( waklog_config * ) ap_pcalloc(p, sizeof(waklog_config ) );
769 waklog_config *parent = ( waklog_config * ) parent_conf;
770 waklog_config *child = ( waklog_config * ) newloc_conf;
771
772 merged->protect = child->protect != WAKLOG_UNSET ? child->protect : parent->protect;
773
774 merged->path = child->path != WAKLOG_UNSET ? child->path : parent->path;
775
776 merged->usertokens = child->usertokens != WAKLOG_UNSET ? child->usertokens : parent->usertokens;
777
778 merged->disable_token_cache = child->disable_token_cache != WAKLOG_UNSET ? child->disable_token_cache : parent->disable_token_cache;
779
780 merged->principal = child->principal != WAKLOG_UNSET ? child->principal : parent->principal;
781
782 merged->keytab = child->keytab != WAKLOG_UNSET ? child->keytab : parent->keytab;
783
784 merged->default_keytab = child->default_keytab != WAKLOG_UNSET ? child->default_keytab : parent->default_keytab;
785
786 merged->default_principal = child->default_principal != WAKLOG_UNSET ? child->default_principal : parent->default_principal;
787
788 merged->afs_cell = child->afs_cell != WAKLOG_UNSET ? child->afs_cell : parent->afs_cell;
789
790 return (void *) merged;
791
792 }
793
794 static void *waklog_merge_server_config(MK_POOL *p, void *parent_conf, void *newloc_conf) {
795
796 waklog_config *merged = ( waklog_config * ) ap_pcalloc(p, sizeof(waklog_config ) );
797 waklog_config *pconf = ( waklog_config * ) parent_conf;
798 waklog_config *nconf = ( waklog_config * ) newloc_conf;
799
800 merged->protect = nconf->protect == WAKLOG_UNSET ? pconf->protect : nconf->protect;
801
802 merged->usertokens = nconf->usertokens == WAKLOG_UNSET ? pconf->usertokens : nconf->usertokens;
803
804 merged->disable_token_cache = nconf->disable_token_cache == WAKLOG_UNSET ? pconf->disable_token_cache : nconf->disable_token_cache;
805
806 merged->keytab = nconf->keytab == WAKLOG_UNSET ? ap_pstrdup(p, pconf->keytab) :
807 ( nconf->keytab == WAKLOG_UNSET ? WAKLOG_UNSET : ap_pstrdup(p, pconf->keytab) );
808
809 merged->principal = nconf->principal == WAKLOG_UNSET ? ap_pstrdup(p, pconf->principal) :
810 ( nconf->principal == WAKLOG_UNSET ? WAKLOG_UNSET : ap_pstrdup(p, pconf->principal) );
811
812 merged->afs_cell = nconf->afs_cell == WAKLOG_UNSET ? ap_pstrdup(p, pconf->afs_cell) :
813 ( nconf->afs_cell == WAKLOG_UNSET ? WAKLOG_UNSET : ap_pstrdup(p, pconf->afs_cell) );
814
815 merged->default_keytab = nconf->default_keytab == WAKLOG_UNSET ? ap_pstrdup(p, pconf->default_keytab) :
816 ( nconf->default_keytab == WAKLOG_UNSET ? WAKLOG_UNSET : ap_pstrdup(p, pconf->default_keytab) );
817
818 merged->default_principal = nconf->default_principal == WAKLOG_UNSET ? ap_pstrdup(p, pconf->default_principal) :
819 ( nconf->default_principal == WAKLOG_UNSET ? WAKLOG_UNSET : ap_pstrdup(p, pconf->default_principal) );
820
821
822 return (void *) merged;
823
824 }
825
826 static const char *
827 set_waklog_enabled (cmd_parms * params, void *mconfig, int flag)
828 {
829 waklog_config *cfg = mconfig ? ( waklog_config * ) mconfig :
830 ( waklog_config * ) ap_get_module_config(params->server->module_config, &waklog_module );
831
832 cfg->protect = flag;
833 cfg->configured = 1;
834 log_error (APLOG_MARK, APLOG_DEBUG, 0, params->server,
835 "mod_waklog: waklog_enabled set on %s", cfg->path ? cfg->path : "NULL");
836 return (NULL);
837 }
838
839
840 /* this adds a principal/keytab pair to get their tokens renewed by the
841 child process every few centons. */
842
843 void add_to_renewtable(MK_POOL *p, char *keytab, char *principal) {
844
845 int i;
846
847 if ( renewcount >= SHARED_TABLE_SIZE ) {
848 log_error(APLOG_MARK, APLOG_DEBUG, 0, NULL, "mod_waklog: big problem. Increase the SHARED_TABLE_SIZE or \
849 decrease your tokens.");
850 return;
851 }
852
853 /* check to see if it's already there */
854
855 for ( i = 0; i < renewcount; i++ ) {
856 if ( ! strcmp(renewtable[i].principal, principal ) ) {
857 return;
858 }
859 }
860
861 renewtable[renewcount].keytab = ap_pstrdup(p, keytab);
862 renewtable[renewcount].principal = ap_pstrdup(p, principal);
863 renewtable[renewcount].lastrenewed = 0;
864 ++renewcount;
865
866 }
867
868 static const char *
869 set_waklog_location_principal (cmd_parms *params, void *mconfig, char *principal, char *keytab)
870 {
871 waklog_config *cfg = mconfig ? ( waklog_config * ) mconfig :
872 ( waklog_config * ) ap_get_module_config(params->server->module_config, &waklog_module );
873
874 log_error (APLOG_MARK, APLOG_DEBUG, 0, params->server,
875 "mod_waklog: configuring principal: %s, keytab: %s", principal, keytab);
876
877 cfg->principal = ap_pstrdup(params->pool, principal);
878 cfg->keytab = ap_pstrdup (params->pool, keytab);
879
880 add_to_renewtable(params->pool, keytab, principal);
881
882 cfg->configured = 1;
883
884 return (NULL);
885 }
886
887 static const char *
888 set_waklog_afs_cell (cmd_parms * params, void *mconfig, char *file)
889 {
890 waklog_config *waklog_mconfig = ( waklog_config * ) mconfig;
891 waklog_config *waklog_srvconfig =
892 ( waklog_config * ) ap_get_module_config(params->server->module_config, &waklog_module );
893
894 log_error (APLOG_MARK, APLOG_INFO, 0, params->server,
895 "mod_waklog: will use afs_cell: %s", file);
896
897 waklog_srvconfig->cell_in_principal = 0;
898 waklog_srvconfig->afs_cell = ap_pstrdup (params->pool, file);
899 waklog_srvconfig->configured = 1;
900
901 if (waklog_mconfig != NULL) {
902 waklog_mconfig->cell_in_principal = waklog_srvconfig->cell_in_principal;
903 waklog_mconfig->afs_cell = ap_pstrdup (params->pool, file);
904 waklog_mconfig->configured = 1;
905 }
906 return (NULL);
907 }
908
909 static const char *
910 set_waklog_default_principal (cmd_parms * params, void *mconfig, char *principal, char *keytab)
911 {
912 waklog_config *cfg = mconfig ? ( waklog_config * ) mconfig :
913 ( waklog_config * ) ap_get_module_config(params->server->module_config, &waklog_module );
914
915 waklog_config *srvcfg = ( waklog_config * ) ap_get_module_config(params->server->module_config, &waklog_module );
916
917 log_error (APLOG_MARK, APLOG_DEBUG, 0, params->server,
918 "mod_waklog: set default princ/keytab: %s, %s for %s", principal, keytab, cfg->path ? cfg->path : "NULL");
919
920 cfg->default_principal = ap_pstrdup (params->pool, principal);
921 cfg->default_keytab = ap_pstrdup(params->pool, keytab );
922
923 /* this also gets set at the server level */
924 if ( mconfig && ( ! cfg->path ) ) {
925 srvcfg->default_principal = ap_pstrdup (params->pool, principal);
926 srvcfg->default_keytab = ap_pstrdup(params->pool, keytab );
927 } else {
928 log_error(APLOG_MARK, APLOG_ERR, 0, params->server, "only able to set default principal on a global level!");
929 return "Unable to set DefaultPrincipal outside of top level config!";
930 }
931
932 add_to_renewtable( params->pool, keytab, principal );
933
934 cfg->configured = 1;
935
936 return (NULL);
937 }
938
939 static const char *
940 set_waklog_use_usertokens (cmd_parms * params, void *mconfig, int flag)
941 {
942 waklog_config *cfg = mconfig ? ( waklog_config * ) mconfig :
943 ( waklog_config * ) ap_get_module_config(params->server->module_config, &waklog_module );
944
945 cfg->usertokens = flag;
946
947 cfg->configured = 1;
948
949 log_error (APLOG_MARK, APLOG_DEBUG, 0, params->server,
950 "mod_waklog: waklog_use_user_tokens set");
951 return (NULL);
952 }
953
954
955 static const char *
956 set_waklog_disable_token_cache (cmd_parms * params, void *mconfig, int flag)
957 {
958 waklog_config *cfg = mconfig ? ( waklog_config * ) mconfig :
959 ( waklog_config * ) ap_get_module_config(params->server->module_config, &waklog_module );
960
961 cfg->disable_token_cache = flag;
962
963 cfg->configured = 1;
964
965 log_error (APLOG_MARK, APLOG_DEBUG, 0, params->server,
966 "mod_waklog: waklog_disable_token_cache set");
967 return (NULL);
968 }
969
970
971 #ifndef APACHE2
972 static void waklog_child_exit( server_rec *s, MK_POOL *p ) {
973 #else
974 apr_status_t waklog_child_exit( void *sr ) {
975
976 server_rec *s = (server_rec *) sr;
977 #endif
978
979 if ( child.ccache ) {
980 krb5_cc_close(child.kcontext, child.ccache);
981 }
982
983 if ( child.kcontext ) {
984 krb5_free_context(child.kcontext);
985 }
986
987 /* forget our tokens */
988
989 ktc_ForgetAllTokens ();
990
991 log_error (APLOG_MARK, APLOG_DEBUG, 0, s,
992 "mod_waklog: waklog_child_exit complete");
993
994 #ifdef APACHE2
995 return APR_SUCCESS;
996 #endif
997
998 }
999
1000 static void
1001 #ifdef APACHE2
1002 waklog_child_init (MK_POOL * p, server_rec * s)
1003 #else
1004 waklog_child_init (server_rec * s, MK_POOL * p)
1005 #endif
1006 {
1007
1008 krb5_error_code code;
1009 waklog_config *cfg;
1010
1011 char *cell;
1012
1013 log_error (APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: child_init called for pid %d", getpid());
1014
1015 if ( !sharedspace ) {
1016 log_error( APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: child_init called without shared space? %d", getpid());
1017 return;
1018 }
1019
1020 log_error (APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: child_init called for pid %d", getpid());
1021
1022 memset (&child, 0, sizeof(child));
1023
1024 if ( code = krb5_init_context(&child.kcontext) ) {
1025 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: can't init kerberos context %d", code );
1026 }
1027
1028 if ( code = krb5_cc_resolve(child.kcontext, "MEMORY:tmpcache", &child.ccache) ) {
1029 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: can't initialize in-memory credentials cache %d", code );
1030 }
1031
1032 if ( pag_for_children ) {
1033 setpag ();
1034 }
1035
1036 getModConfig (cfg, s);
1037
1038 if ( cfg->default_principal != WAKLOG_UNSET ) {
1039 log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: child_init setting default user %s, %s", cfg->default_principal, cfg->default_keytab);
1040 set_auth( s, NULL, 0, cfg->default_principal, cfg->default_keytab, 0);
1041 }
1042
1043 cell = strdup(cfg->afs_cell);
1044 pr_Initialize( 0, AFSDIR_CLIENT_ETC_DIR, cell );
1045
1046 #ifdef APACHE2
1047 apr_pool_cleanup_register(p, s, waklog_child_exit, apr_pool_cleanup_null);
1048 #endif
1049
1050 log_error (APLOG_MARK, APLOG_DEBUG, 0, s,
1051 "mod_waklog: child_init returned");
1052
1053 return;
1054 }
1055
1056 command_rec waklog_cmds[] = {
1057
1058 command ("WaklogAFSCell", set_waklog_afs_cell, 0, TAKE1,
1059 "Use the supplied AFS cell (required)"),
1060
1061 command ("WaklogEnabled", set_waklog_enabled, 0, FLAG,
1062 "enable waklog on a server, location, or directory basis"),
1063
1064 command ("WaklogDefaultPrincipal", set_waklog_default_principal, 0, TAKE2,
1065 "Set the default principal that the server runs as"),
1066
1067 command ("WaklogLocationPrincipal", set_waklog_location_principal, 0, TAKE2,
1068 "Set the principal on a <Location>-specific basis"),
1069
1070 command ("WaklogDisableTokenCache", set_waklog_disable_token_cache, 0, FLAG,
1071 "Ignore the token cache (location-specific); useful for scripts that need kerberos tickets."),
1072
1073 command ("WaklogUseUserTokens", set_waklog_use_usertokens, 0, FLAG,
1074 "Use the requesting user tokens (from webauth)"),
1075
1076 {NULL}
1077 };
1078
1079
1080 /* not currently using this */
1081
1082 static int
1083 token_cleanup (void *data)
1084 {
1085 request_rec *r = (request_rec *) data;
1086
1087 if (child.token.ticketLen)
1088 {
1089 memset (&child.token, 0, sizeof (struct ktc_token));
1090
1091 ktc_ForgetAllTokens ();
1092
1093 log_error (APLOG_MARK, APLOG_DEBUG, 0, r->server,
1094 "mod_waklog: ktc_ForgetAllTokens succeeded: pid: %d",
1095 getpid ());
1096 }
1097 return 0;
1098 }
1099
1100 static int
1101 waklog_child_routine (void *data, child_info * pinfo)
1102 {
1103 int i;
1104 server_rec *s = (server_rec *) data;
1105 krb5_error_code code;
1106 char *cell;
1107 time_t sleep_time = ( TKT_LIFE / 2 ) ;
1108 time_t when;
1109 time_t left;
1110 waklog_config *cfg;
1111
1112 getModConfig( cfg, s );
1113
1114 log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: waklog_child_routine started, running as %d", getuid());
1115
1116 memset (&child, 0, sizeof(child));
1117
1118 if ( code = krb5_init_context(&child.kcontext) ) {
1119 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: can't init kerberos context %d", code );
1120 }
1121
1122 if ( code = krb5_cc_resolve(child.kcontext, "MEMORY:tmpcache", &child.ccache) ) {
1123 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: can't initialize in-memory credentials cache %d", code );
1124 }
1125
1126 /* need to do this so we can make PTS calls */
1127 cell = strdup(cfg->afs_cell); /* stupid */
1128 pr_Initialize( 0, AFSDIR_CLIENT_ETC_DIR, cell );
1129
1130 while(1) {
1131
1132 for ( i = 0; i < renewcount; ++i ) {
1133 renewtable[i].lastrenewed = time(0);
1134 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: (pid %d) renewing %s / %s", getpid(), renewtable[i].principal,
1135 renewtable[i].keytab);
1136
1137 set_auth( s, NULL, 0, renewtable[i].principal, renewtable[i].keytab, 1 );
1138
1139 /* if this is our default token, we want to "stash" it in our current PAG so the parent maintains readability of
1140 things that it needs to read */
1141
1142 if ( cfg && cfg->default_principal && ( ! strcmp(cfg->default_principal, renewtable[i].principal ) ) ) {
1143 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: renewing/setting default tokens" );
1144 set_auth( s, NULL, 0, renewtable[i].principal, renewtable[i].keytab, 0 );
1145 }
1146
1147 }
1148
1149 sharedspace->renewcount++;
1150
1151 left = sleep_time;
1152
1153 while( left > 5 ) {
1154 when = time(0);
1155
1156 sleep(left);
1157
1158 left -= ( time(0) - when );
1159 }
1160
1161 }
1162
1163 pr_End();
1164
1165 }
1166
1167 #ifdef APACHE2
1168 static int
1169 waklog_init_handler (apr_pool_t * p, apr_pool_t * plog,
1170 apr_pool_t * ptemp, server_rec * s)
1171 {
1172 int rv;
1173 extern char *version;
1174 apr_proc_t *proc;
1175 waklog_config *cfg;
1176 void *data;
1177 int fd = -1;
1178 int use_existing = 1;
1179 int oldrenewcount;
1180 char cache_file[MAXNAMELEN];
1181 #ifdef use_pthreads
1182 pthread_rwlockattr_t rwlock_attr;
1183 #endif
1184
1185
1186 getModConfig (cfg, s);
1187
1188 /* initialize_module() will be called twice, and if it's a DSO
1189 * then all static data from the first call will be lost. Only
1190 * set up our static data on the second call.
1191 * see http://issues.apache.org/bugzilla/show_bug.cgi?id=37519 */
1192 apr_pool_userdata_get (&data, userdata_key, s->process->pool);
1193
1194
1195 if (cfg->afs_cell==NULL) {
1196 log_error (APLOG_MARK, APLOG_ERR, 0, s,
1197 "mod_waklog: afs_cell==NULL; please provide the WaklogAFSCell directive");
1198 /** clobber apache */
1199 exit(-1);
1200 }
1201
1202 if (!data)
1203 {
1204 apr_pool_userdata_set ((const void *) 1, userdata_key,
1205 apr_pool_cleanup_null, s->process->pool);
1206 }
1207 else
1208 {
1209 log_error (APLOG_MARK, APLOG_INFO, 0, s,
1210 "mod_waklog: version %s initialized for cell %s", version, cfg->afs_cell);
1211
1212 if ( sharedspace ) {
1213 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: shared memory already allocated." );
1214 } else {
1215
1216 snprintf( cache_file, MAXNAMELEN, "/tmp/waklog_cache.%d", getpid() );
1217
1218 if ( ( fd = open( cache_file, O_RDWR, 0600 ) ) == -1 ) {
1219
1220 if ( errno == ENOENT ) {
1221
1222 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: creating shared token cache file %s", cache_file );
1223 use_existing = 0;
1224 if ( ( fd = open( cache_file, O_RDWR|O_CREAT|O_TRUNC, 0600 ) ) == -1 ) {
1225 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: cannot create shared token cache file %s (%d)", cache_file, errno );
1226 exit(errno);
1227 }
1228 } else {
1229 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: cannot open existing shared token cache file %s (%d)", cache_file, errno );
1230 }
1231 }
1232
1233 if ( use_existing == 0 ) {
1234 struct sharedspace_s bob;
1235 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: sizing our cache file %d to %d", fd, sizeof(struct sharedspace_s) );
1236 memset( &bob, 0, sizeof(struct sharedspace_s));
1237 write(fd, &bob, sizeof(struct sharedspace_s));
1238 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: done sizing our cache file to %d", sizeof(struct sharedspace_s) );
1239 }
1240
1241 /* mmap the region */
1242
1243 if ( ( sharedspace = (struct sharedspace_s *) mmap ( NULL, sizeof(struct sharedspace_s), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0 ) ) != MAP_FAILED ) {
1244 log_error( APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: shared mmap region ok %d", sharedspace );
1245 close(fd);
1246 } else {
1247 log_error( APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: mmap failed %d", errno );
1248 exit(errno);
1249 }
1250 }
1251
1252 #ifdef use_pthreads
1253 #define locktype pthread_rwlock_t
1254 #else
1255 #define locktype rwlock_t
1256 #endif
1257
1258 if ( sharedlock = ( locktype * ) mmap ( NULL, sizeof(locktype), PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANON, -1, 0 ) ) {
1259 #ifndef use_pthreads
1260 rwlock_init(sharedlock, USYNC_PROCESS, NULL );
1261 #else
1262 pthread_rwlockattr_init(&rwlock_attr);
1263 pthread_rwlockattr_setpshared(&rwlock_attr, PTHREAD_PROCESS_SHARED);
1264 pthread_rwlock_init(sharedlock, &rwlock_attr );
1265 #endif
1266 } else {
1267 log_error( APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: rwlock mmap failed %d", errno );
1268 }
1269
1270 #undef locktype
1271
1272 /* set our default tokens */
1273
1274 oldrenewcount = sharedspace->renewcount;
1275
1276 pag_for_children = 0;
1277
1278 proc = (apr_proc_t *) ap_pcalloc (s->process->pool, sizeof (apr_proc_t));
1279
1280 rv = apr_proc_fork (proc, s->process->pool);
1281
1282 if (rv == APR_INCHILD)
1283 {
1284 waklog_child_routine (s, NULL);
1285 }
1286 else
1287 {
1288 apr_pool_note_subprocess (s->process->pool, proc, APR_KILL_ALWAYS);
1289 }
1290 /* parent and child */
1291 cfg->forked = proc->pid;
1292 pag_for_children = 1;
1293
1294 if ( use_existing == 0 ) {
1295 /* wait here until our child process has gone and done it's renewing thing. */
1296 while( sharedspace->renewcount == oldrenewcount ) {
1297 log_error( APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: waiting for tokens..." );
1298 sleep(2);
1299 }
1300 }
1301
1302 if ( cfg->default_principal ) {
1303 set_auth( s, NULL, 0, cfg->default_principal, cfg->default_keytab, 0);
1304 }
1305 }
1306 return 0;
1307 }
1308 #else
1309 static void
1310 waklog_init (server_rec * s, MK_POOL * p)
1311 {
1312 extern char *version;
1313 int pid;
1314 waklog_config *cfg;
1315 char *cell;
1316 int fd = -1;
1317 int use_existing = 1;
1318 int oldrenewcount;
1319 char cache_file[MAXNAMELEN];
1320 #ifdef use_pthreads
1321 pthread_rwlockattr_t rwlock_attr;
1322 #endif
1323
1324 log_error (APLOG_MARK, APLOG_DEBUG, 0, s,
1325 "mod_waklog: version %s initialized.", version);
1326
1327 if ( sharedspace ) {
1328 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: shared memory already allocated." );
1329 } else {
1330
1331 snprintf( cache_file, MAXNAMELEN, "/tmp/waklog_cache.%d", getpid() );
1332
1333 if ( ( fd = open( cache_file, O_RDWR, 0600 ) ) == -1 ) {
1334
1335 if ( errno == ENOENT ) {
1336
1337 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: creating shared token cache file %s", cache_file );
1338 use_existing = 0;
1339 if ( ( fd = open( cache_file, O_RDWR|O_CREAT|O_TRUNC, 0600 ) ) == -1 ) {
1340 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: cannot create shared token cache file %s (%d)", cache_file, errno );
1341 exit(errno);
1342 }
1343 } else {
1344 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: cannot open existing shared token cache file %s (%d)", cache_file, errno );
1345 }
1346
1347 }
1348
1349 if ( use_existing == 0 ) {
1350 struct sharedspace_s bob;
1351 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: sizing our cache file %d to %d", fd, sizeof(struct sharedspace_s) );
1352 memset( &bob, 0, sizeof(struct sharedspace_s));
1353 write(fd, &bob, sizeof(struct sharedspace_s));
1354 log_error(APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: done sizing our cache file to %d", sizeof(struct sharedspace_s) );
1355 }
1356
1357 /* mmap the region */
1358
1359 if ( ( sharedspace = (struct sharedspace_s *) mmap ( NULL, sizeof(struct sharedspace_s), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0 ) ) != -1 ) {
1360 log_error( APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: shared mmap region ok %d", sharedspace );
1361 close(fd);
1362 } else {
1363 log_error( APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: mmap failed %d", errno );
1364 exit(errno);
1365 }
1366 }
1367
1368 #ifdef use_pthreads
1369 #define locktype pthread_rwlock_t
1370 #else
1371 #define locktype rwlock_t
1372 #endif
1373
1374 /* mmap our shared space for our lock */
1375 if ( sharedlock = ( locktype * ) mmap ( NULL, sizeof(locktype), PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANON, -1, 0 ) ) {
1376 #ifndef use_pthreads
1377 rwlock_init(sharedlock, USYNC_PROCESS, NULL );
1378 #else
1379 pthread_rwlockattr_init(&rwlock_attr);
1380 pthread_rwlockattr_setpshared(&rwlock_attr, PTHREAD_PROCESS_SHARED);
1381 pthread_rwlock_init(sharedlock, &rwlock_attr );
1382 #endif
1383 } else {
1384 log_error( APLOG_MARK, APLOG_DEBUG, 0, s, "mod_waklog: rwlock mmap failed %d", errno );
1385 }
1386
1387 #undef locktype
1388
1389 /* set our default tokens */
1390
1391 getModConfig (cfg, s);
1392
1393 oldrenewcount = sharedspace->renewcount;
1394
1395 pag_for_children = 0;
1396
1397 pid = ap_bspawn_child (p, waklog_child_routine, s, kill_always,
1398 NULL, NULL, NULL);
1399
1400 pag_for_children = 1;
1401
1402 log_error (APLOG_MARK, APLOG_DEBUG, 0, s,
1403 "mod_waklog: ap_bspawn_child: %d.", pid);
1404
1405 if ( use_existing == 0 ) {
1406 /* wait here until our child process has gone and done it's renewing thing. */
1407 while( sharedspace->renewcount == oldrenewcount ) {
1408 log_error( APLOG_MARK, APLOG_ERR, 0, s, "mod_waklog: waiting for tokens..." );
1409 sleep(2);
1410 }
1411 }
1412
1413 if ( cfg->default_principal ) {
1414 set_auth( s, NULL, 0, cfg->default_principal, cfg->default_keytab, 0);
1415 }
1416
1417 }
1418 #endif
1419
1420 static int
1421 waklog_phase0 (request_rec * r)
1422 {
1423 waklog_config *cfg;
1424
1425 log_error (APLOG_MARK, APLOG_DEBUG, 0, r->server,
1426 "mod_waklog: phase0 called");
1427
1428 cfg = retrieve_config(r);
1429
1430 if ( cfg->protect && cfg->principal ) {
1431 log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, "mod_waklog: phase0 using user %s", cfg->principal);
1432 set_auth(r->server, r, 0, cfg->principal, cfg->keytab, 0);
1433 } else if ( cfg->default_principal ) {
1434 log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, "mod_waklog: phase0 using default user %s", cfg->default_principal);
1435 set_auth(r->server, r, 0, cfg->default_principal, cfg->default_keytab, 0);
1436 } else {
1437 log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, "mod_waklog: phase0 not doing nothin.");
1438 }
1439
1440 return DECLINED;
1441 }
1442
1443 static int
1444 waklog_phase1 (request_rec * r)
1445 {
1446 waklog_config *cfg;
1447
1448 log_error (APLOG_MARK, APLOG_DEBUG, 0, r->server,
1449 "mod_waklog: phase1 called");
1450
1451 cfg = retrieve_config(r);
1452
1453 if ( cfg->protect && cfg->principal ) {
1454 log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, "mod_waklog: phase1 using user %s", cfg->principal);
1455 set_auth(r->server, r, 0, cfg->principal, cfg->keytab, 0);
1456 } else if ( cfg->default_principal ) {
1457 log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, "mod_waklog: phase1 using default user %s", cfg->default_principal);
1458 set_auth(r->server, r, 0, cfg->default_principal, cfg->default_keytab, 0);
1459 } else {
1460 log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, "mod_waklog: phase1 not doing nothin.");
1461 }
1462
1463 return DECLINED;
1464 }
1465
1466 static int
1467 waklog_phase3 (request_rec * r)
1468 {
1469 waklog_config *cfg;
1470
1471 log_error (APLOG_MARK, APLOG_DEBUG, 0, r->server,
1472 "mod_waklog: phase 3 called");
1473
1474 cfg = retrieve_config(r);
1475
1476 if ( cfg->protect && cfg->principal ) {
1477 log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, "mod_waklog: phase3 using user %s", cfg->principal);
1478 set_auth(r->server, r, 0, cfg->principal, cfg->keytab, 0);
1479 } else if ( cfg->default_principal ) {
1480 log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, "mod_waklog: phase3 using default user %s", cfg->default_principal);
1481 set_auth(r->server, r, 0, cfg->default_principal, cfg->default_keytab, 0);
1482 } else {
1483 log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, "mod_waklog: phase3 not doing nothin.");
1484 }
1485
1486 return DECLINED;
1487 }
1488
1489 static int
1490 waklog_phase6 (request_rec * r)
1491 {
1492 waklog_config *cfg;
1493
1494 log_error (APLOG_MARK, APLOG_DEBUG, 0, r->server,
1495 "mod_waklog: phase6 called");
1496
1497 cfg = retrieve_config(r);
1498
1499 if ( cfg->protect && cfg->principal ) {
1500 log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, "mod_waklog: phase6 using user %s", cfg->principal);
1501 set_auth(r->server, r, 0, cfg->principal, cfg->keytab, 0);
1502 } else if ( cfg->default_principal ) {
1503 log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, "mod_waklog: phase6 using default user %s", cfg->default_principal);
1504 set_auth(r->server, r, 0, cfg->default_principal, cfg->default_keytab, 0);
1505 } else {
1506 log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, "mod_waklog: phase6 not doing nothin.");
1507 }
1508
1509 return DECLINED;
1510 }
1511
1512 static int
1513 waklog_phase7 (request_rec * r)
1514 {
1515 waklog_config *cfg;
1516 int rc = 0;
1517
1518 log_error (APLOG_MARK, APLOG_DEBUG, 0, r->server,
1519 "mod_waklog: phase7 called");
1520
1521 cfg = retrieve_config (r);
1522
1523 if ( cfg->protect && cfg->usertokens ) {
1524 log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, "mod_waklog: phase7 using usertokens");
1525 rc = set_auth( r->server, r, 1, NULL, NULL, 0);
1526 } else if ( cfg->protect && cfg->principal ) {
1527 log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, "mod_waklog: phase7 using user %s", cfg->principal);
1528 rc = set_auth( r->server, r, 0, cfg->principal, cfg->keytab, 0);
1529 } else if ( cfg->default_principal ) {
1530 log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, "mod_waklog: phase7 using default user %s", cfg->default_principal);
1531 rc = set_auth( r->server, r, 0, cfg->default_principal, cfg->default_keytab, 0);
1532 }
1533
1534 if ( rc ) {
1535 return 400;
1536 }
1537
1538 return DECLINED;
1539 }
1540
1541 static int
1542 waklog_phase9 (request_rec * r)
1543 {
1544 waklog_config *cfg;
1545
1546 log_error (APLOG_MARK, APLOG_DEBUG, 0, r->server,
1547 "mod_waklog: phase9 called");
1548
1549 getModConfig (cfg, r->server);
1550
1551 if ( cfg->default_principal ) {
1552 log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, "mod_waklog: phase9 using default user %s", cfg->default_principal);
1553 set_auth( r->server, r, 0, cfg->default_principal, cfg->default_keytab, 0);
1554 }
1555
1556 return DECLINED;
1557 }
1558
1559
1560 static
1561 #ifdef APACHE2
1562 int
1563 #else
1564 void
1565 #endif
1566 waklog_new_connection (conn_rec * c
1567 #ifdef APACHE2
1568 , void *dummy
1569 #endif
1570 )
1571 {
1572
1573 waklog_config *cfg;
1574
1575 log_error (APLOG_MARK, APLOG_DEBUG, 0, c->base_server,
1576 "mod_waklog: new_connection called: pid: %d", getpid ());
1577
1578 getModConfig(cfg, c->base_server);
1579
1580 if ( cfg->default_principal ) {
1581 log_error(APLOG_MARK, APLOG_DEBUG, 0, c->base_server, "mod_waklog: new conn setting default user %s",
1582 cfg->default_principal);
1583 set_auth( c->base_server, NULL, 0, cfg->default_principal, cfg->default_keytab, 0);
1584 }
1585
1586
1587 return
1588 #ifdef APACHE2
1589 0
1590 #endif
1591 ;
1592 }
1593
1594
1595 /*
1596 ** Here's a quick explaination for phase0 and phase2:
1597 ** Apache does a stat() on the path between phase0 and
1598 ** phase2, and must by ACLed rl to succeed. So, at
1599 ** phase0 we acquire credentials for umweb:servers from
1600 ** a keytab, and at phase2 we must ensure we remove them.
1601 **
1602 ** Failure to "unlog" would be a security risk.
1603 */
1604 static int
1605 waklog_phase2 (request_rec * r)
1606 {
1607
1608 log_error (APLOG_MARK, APLOG_DEBUG, 0, r->server,
1609 "mod_waklog: phase2 called");
1610
1611 if (child.token.ticketLen)
1612 {
1613 memset (&child.token, 0, sizeof (struct ktc_token));
1614
1615 ktc_ForgetAllTokens ();
1616
1617 log_error (APLOG_MARK, APLOG_DEBUG, 0, r->server,
1618 "mod_waklog: ktc_ForgetAllTokens succeeded: pid: %d",
1619 getpid ());
1620 }
1621
1622 log_error (APLOG_MARK, APLOG_DEBUG, 0, r->server,
1623 "mod_waklog: phase2 returning");
1624
1625 return DECLINED;
1626 }
1627
1628 #ifndef APACHE2
1629 module MODULE_VAR_EXPORT waklog_module = {
1630 STANDARD_MODULE_STUFF,
1631 waklog_init, /* module initializer */
1632 waklog_create_dir_config, /* create per-dir config structures */
1633 waklog_merge_dir_config, /* merge per-dir config structures */
1634 waklog_create_server_config, /* create per-server config structures */
1635 waklog_merge_dir_config, /* merge per-server config structures */
1636 waklog_cmds, /* table of config file commands */
1637 NULL, /* [#8] MIME-typed-dispatched handlers */
1638 waklog_phase1, /* [#1] URI to filename translation */
1639 NULL, /* [#4] validate user id from request */
1640 NULL, /* [#5] check if the user is ok _here_ */
1641 waklog_phase3, /* [#3] check access by host address */
1642 waklog_phase6, /* [#6] determine MIME type */
1643 waklog_phase7, /* [#7] pre-run fixups */
1644 waklog_phase9, /* [#9] log a transaction */
1645 NULL, /* [#2] header parser */
1646 waklog_child_init, /* child_init */
1647 waklog_child_exit, /* child_exit */
1648 waklog_phase0 /* [#0] post read-request */
1649 #ifdef EAPI
1650 , NULL, /* EAPI: add_module */
1651 NULL, /* EAPI: remove_module */
1652 NULL, /* EAPI: rewrite_command */
1653 waklog_new_connection /* EAPI: new_connection */
1654 #endif
1655 };
1656 #else
1657 static void
1658 waklog_register_hooks (apr_pool_t * p)
1659 {
1660 ap_hook_translate_name (waklog_phase1, NULL, NULL, APR_HOOK_FIRST);
1661 ap_hook_header_parser (waklog_phase2, NULL, NULL, APR_HOOK_FIRST);
1662 ap_hook_access_checker (waklog_phase3, NULL, NULL, APR_HOOK_FIRST);
1663 ap_hook_type_checker (waklog_phase6, NULL, NULL, APR_HOOK_FIRST);
1664 ap_hook_fixups (waklog_phase7, NULL, NULL, APR_HOOK_FIRST);
1665 ap_hook_log_transaction (waklog_phase9, NULL, NULL, APR_HOOK_FIRST);
1666 ap_hook_child_init (waklog_child_init, NULL, NULL, APR_HOOK_FIRST);
1667 ap_hook_post_read_request (waklog_phase0, NULL, NULL, APR_HOOK_FIRST);
1668 ap_hook_pre_connection (waklog_new_connection, NULL, NULL, APR_HOOK_FIRST);
1669 ap_hook_post_config (waklog_init_handler, NULL, NULL, APR_HOOK_MIDDLE);
1670 }
1671
1672
1673 module AP_MODULE_DECLARE_DATA waklog_module = {
1674 STANDARD20_MODULE_STUFF,
1675 waklog_create_dir_config, /* create per-dir conf structures */
1676 waklog_merge_dir_config, /* merge per-dir conf structures */
1677 waklog_create_server_config, /* create per-server conf structures */
1678 waklog_merge_dir_config, /* merge per-server conf structures */
1679 waklog_cmds, /* table of configuration directives */
1680 waklog_register_hooks /* register hooks */
1681 };
1682 #endif
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