d9898ee8 |
1 | /* |
2 | ** Copyright 2000-2006 Double Precision, Inc. See COPYING for |
3 | ** distribution information. |
4 | */ |
5 | |
6 | #include "auth.h" |
7 | #include "authstaticlist.h" |
8 | #include "courierauthsasl.h" |
9 | #include <stdio.h> |
10 | #include <stdlib.h> |
11 | #include <string.h> |
12 | #if HAVE_UNISTD_H |
13 | #include <unistd.h> |
14 | #endif |
15 | #include <fcntl.h> |
16 | #include <sys/types.h> |
17 | #include <sys/socket.h> |
18 | #include <sys/un.h> |
19 | #include <sys/time.h> |
20 | #if HAVE_SYS_SELECT_H |
21 | #include <sys/select.h> |
22 | #endif |
23 | #include <unistd.h> |
24 | #include <stdlib.h> |
25 | #include <stdio.h> |
26 | #include <errno.h> |
27 | #include "authdaemonrc.h" |
28 | #include "numlib/numlib.h" |
29 | |
30 | static int TIMEOUT_SOCK=10, |
31 | TIMEOUT_WRITE=10, |
32 | TIMEOUT_READ=30; |
33 | |
34 | static const char rcsid[]="$Id: authdaemonlib.c,v 1.17 2006/01/22 03:33:24 mrsam Exp $"; |
35 | |
36 | static int s_connect(int sockfd, |
37 | const struct sockaddr *addr, |
38 | size_t addr_s, |
39 | time_t connect_timeout) |
40 | { |
41 | fd_set fdr; |
42 | struct timeval tv; |
43 | int rc; |
44 | |
45 | #ifdef SOL_KEEPALIVE |
46 | setsockopt(sockfd, SOL_SOCKET, SOL_KEEPALIVE, |
47 | (const char *)&dummy, sizeof(dummy)); |
48 | #endif |
49 | |
50 | #ifdef SOL_LINGER |
51 | { |
52 | struct linger l; |
53 | |
54 | l.l_onoff=0; |
55 | l.l_linger=0; |
56 | |
57 | setsockopt(sockfd, SOL_SOCKET, SOL_LINGER, |
58 | (const char *)&l, sizeof(l)); |
59 | } |
60 | #endif |
61 | |
62 | /* |
63 | ** If configuration says to use the kernel's timeout settings, |
64 | ** just call connect, and be done with it. |
65 | */ |
66 | |
67 | if (connect_timeout == 0) |
68 | return ( connect(sockfd, addr, addr_s)); |
69 | |
70 | /* Asynchronous connect with timeout. */ |
71 | |
72 | if (fcntl(sockfd, F_SETFL, O_NONBLOCK) < 0) return (-1); |
73 | |
74 | if ( connect(sockfd, addr, addr_s) == 0) |
75 | { |
76 | /* That was easy, we're done. */ |
77 | |
78 | if (fcntl(sockfd, F_SETFL, 0) < 0) return (-1); |
79 | return (0); |
80 | } |
81 | |
82 | if (errno != EINPROGRESS) |
83 | return -1; |
84 | |
85 | /* Wait for the connection to go through, until the timeout expires */ |
86 | |
87 | FD_ZERO(&fdr); |
88 | FD_SET(sockfd, &fdr); |
89 | tv.tv_sec=connect_timeout; |
90 | tv.tv_usec=0; |
91 | |
92 | rc=select(sockfd+1, 0, &fdr, 0, &tv); |
93 | if (rc < 0) return (-1); |
94 | |
95 | if (!FD_ISSET(sockfd, &fdr)) |
96 | { |
97 | errno=ETIMEDOUT; |
98 | return (-1); |
99 | } |
100 | |
101 | { |
102 | int gserr; |
103 | socklen_t gslen = sizeof(gserr); |
104 | |
105 | if (getsockopt(sockfd, SOL_SOCKET, |
106 | SO_ERROR, |
107 | (char *)&gserr, &gslen)==0) |
108 | { |
109 | if (gserr == 0) |
110 | return 0; |
111 | |
112 | errno=gserr; |
113 | } |
114 | } |
115 | return (-1); |
116 | } |
117 | |
118 | static int opensock() |
119 | { |
120 | int s=socket(PF_UNIX, SOCK_STREAM, 0); |
121 | struct sockaddr_un skun; |
122 | |
123 | skun.sun_family=AF_UNIX; |
124 | strcpy(skun.sun_path, AUTHDAEMONSOCK); |
125 | |
126 | if (s < 0) |
127 | { |
128 | perror("CRIT: authdaemon: socket() failed"); |
129 | return (-1); |
130 | } |
131 | |
132 | { |
133 | const char *p=getenv("TIMEOUT_SOCK"); |
134 | int n=atoi(p ? p:"0"); |
135 | |
136 | if (n > 0) |
137 | TIMEOUT_SOCK=n; |
138 | } |
139 | |
140 | { |
141 | const char *p=getenv("TIMEOUT_READ"); |
142 | int n=atoi(p ? p:"0"); |
143 | |
144 | if (n > 0) |
145 | TIMEOUT_READ=n; |
146 | } |
147 | |
148 | { |
149 | const char *p=getenv("TIMEOUT_WRITE"); |
150 | int n=atoi(p ? p:"0"); |
151 | |
152 | if (n > 0) |
153 | TIMEOUT_WRITE=n; |
154 | } |
155 | |
156 | if (s_connect(s, (const struct sockaddr *)&skun, sizeof(skun), |
157 | TIMEOUT_SOCK)) |
158 | { |
159 | perror("ERR: authdaemon: s_connect() failed"); |
160 | if (errno == ETIMEDOUT || errno == ECONNREFUSED) |
161 | fprintf(stderr, "ERR: [Hint: perhaps authdaemond is not running?]\n"); |
162 | close(s); |
163 | return (-1); |
164 | } |
165 | return (s); |
166 | } |
167 | |
168 | static int writeauth(int fd, const char *p, unsigned pl) |
169 | { |
170 | fd_set fds; |
171 | struct timeval tv; |
172 | |
173 | while (pl) |
174 | { |
175 | int n; |
176 | |
177 | FD_ZERO(&fds); |
178 | FD_SET(fd, &fds); |
179 | tv.tv_sec=TIMEOUT_WRITE; |
180 | tv.tv_usec=0; |
181 | if (select(fd+1, 0, &fds, 0, &tv) <= 0 || !FD_ISSET(fd, &fds)) |
182 | return (-1); |
183 | n=write(fd, p, pl); |
184 | if (n <= 0) return (-1); |
185 | p += n; |
186 | pl -= n; |
187 | } |
188 | return (0); |
189 | } |
190 | |
191 | static void readauth(int fd, char *p, unsigned pl, const char *term) |
192 | { |
193 | time_t end_time, curtime; |
194 | unsigned len = 0, tlen = strlen(term); |
195 | |
196 | --pl; |
197 | |
198 | time(&end_time); |
199 | end_time += TIMEOUT_READ; |
200 | |
201 | while (pl) |
202 | { |
203 | int n; |
204 | fd_set fds; |
205 | struct timeval tv; |
206 | |
207 | time(&curtime); |
208 | if (curtime >= end_time) |
209 | break; |
210 | |
211 | FD_ZERO(&fds); |
212 | FD_SET(fd, &fds); |
213 | tv.tv_sec=end_time - curtime; |
214 | tv.tv_usec=0; |
215 | if (select(fd+1, &fds, 0, 0, &tv) <= 0 || !FD_ISSET(fd, &fds)) |
216 | break; |
217 | |
218 | n=read(fd, p, pl); |
219 | if (n <= 0) |
220 | break; |
221 | p += n; |
222 | pl -= n; |
223 | /* end-of-message detection for authpipe */ |
224 | len += n; |
225 | if (len >= tlen && strncmp(p-tlen, term, tlen) == 0) |
226 | break; |
227 | else if (len == 5 && strncmp(p-5, "FAIL\n", 5) == 0) |
228 | break; |
229 | } |
230 | *p=0; |
231 | } |
232 | |
233 | int _authdaemondopasswd(int wrfd, int rdfd, char *buffer, int bufsiz) |
234 | { |
235 | if (writeauth(wrfd, buffer, strlen(buffer))) |
236 | return 1; |
237 | |
238 | readauth(rdfd, buffer, bufsiz, "\n"); |
239 | |
240 | if (strcmp(buffer, "OK\n")) |
241 | { |
242 | errno=EPERM; |
243 | return -1; |
244 | } |
245 | return 0; |
246 | } |
247 | |
248 | int authdaemondopasswd(char *buffer, int bufsiz) |
249 | { |
250 | int s=opensock(); |
251 | int rc; |
252 | |
253 | if (s < 0) |
254 | return (1); |
255 | rc = _authdaemondopasswd(s, s, buffer, bufsiz); |
256 | close(s); |
257 | return rc; |
258 | } |
259 | |
260 | int _authdaemondo(int wrfd, int rdfd, const char *authreq, |
261 | int (*func)(struct authinfo *, void *), void *arg) |
262 | { |
263 | char buf[BUFSIZ]; |
264 | char *p, *q, *r; |
265 | struct authinfo a; |
266 | uid_t u; |
267 | |
268 | if (writeauth(wrfd, authreq, strlen(authreq))) |
269 | { |
270 | return (1); |
271 | } |
272 | |
273 | readauth(rdfd, buf, sizeof(buf), "\n.\n"); |
274 | memset(&a, 0, sizeof(a)); |
275 | a.homedir=""; |
276 | p=buf; |
277 | while (*p) |
278 | { |
279 | for (q=p; *q; q++) |
280 | if (*q == '\n') |
281 | { |
282 | *q++=0; |
283 | break; |
284 | } |
285 | if (strcmp(p, ".") == 0) |
286 | { |
287 | return ( (*func)(&a, arg)); |
288 | } |
289 | if (strcmp(p, "FAIL") == 0) |
290 | { |
291 | errno=EPERM; |
292 | return (-1); |
293 | } |
294 | r=strchr(p, '='); |
295 | if (!r) |
296 | { |
297 | p=q; |
298 | continue; |
299 | } |
300 | *r++=0; |
301 | |
302 | if (strcmp(p, "USERNAME") == 0) |
303 | a.sysusername=r; |
304 | else if (strcmp(p, "UID") == 0) |
305 | { |
306 | u=atol(r); |
307 | a.sysuserid= &u; |
308 | } |
309 | else if (strcmp(p, "GID") == 0) |
310 | { |
311 | a.sysgroupid=atol(r); |
312 | } |
313 | else if (strcmp(p, "HOME") == 0) |
314 | { |
315 | a.homedir=r; |
316 | } |
317 | else if (strcmp(p, "ADDRESS") == 0) |
318 | { |
319 | a.address=r; |
320 | } |
321 | else if (strcmp(p, "NAME") == 0) |
322 | { |
323 | a.fullname=r; |
324 | } |
325 | else if (strcmp(p, "MAILDIR") == 0) |
326 | { |
327 | a.maildir=r; |
328 | } |
329 | else if (strcmp(p, "QUOTA") == 0) |
330 | { |
331 | a.quota=r; |
332 | } |
333 | else if (strcmp(p, "PASSWD") == 0) |
334 | { |
335 | a.passwd=r; |
336 | } |
337 | else if (strcmp(p, "PASSWD2") == 0) |
338 | { |
339 | a.clearpasswd=r; |
340 | } |
341 | else if (strcmp(p, "OPTIONS") == 0) |
342 | { |
343 | a.options=r; |
344 | } |
345 | p=q; |
346 | } |
347 | errno=EIO; |
348 | return (1); |
349 | } |
350 | |
351 | int authdaemondo(const char *authreq, |
352 | int (*func)(struct authinfo *, void *), void *arg) |
353 | { |
354 | int s=opensock(); |
355 | int rc; |
356 | |
357 | if (s < 0) |
358 | { |
359 | return (1); |
360 | } |
361 | rc = _authdaemondo(s, s, authreq, func, arg); |
362 | close(s); |
363 | return rc; |
364 | } |
365 | |
366 | void auth_daemon_cleanup() |
367 | { |
368 | } |
369 | |
370 | struct enum_getch { |
371 | char buffer[BUFSIZ]; |
372 | char *buf_ptr; |
373 | size_t buf_left; |
374 | }; |
375 | |
376 | #define getauthc(fd,eg) ((eg)->buf_left-- ? \ |
377 | (unsigned char)*((eg)->buf_ptr)++:\ |
378 | fillgetauthc((fd),(eg))) |
379 | |
380 | static int fillgetauthc(int fd, struct enum_getch *eg) |
381 | { |
382 | time_t end_time, curtime; |
383 | |
384 | time(&end_time); |
385 | end_time += 60; |
386 | |
387 | for (;;) |
388 | { |
389 | int n; |
390 | fd_set fds; |
391 | struct timeval tv; |
392 | |
393 | time(&curtime); |
394 | if (curtime >= end_time) |
395 | break; |
396 | |
397 | FD_ZERO(&fds); |
398 | FD_SET(fd, &fds); |
399 | tv.tv_sec=end_time - curtime; |
400 | tv.tv_usec=0; |
401 | if (select(fd+1, &fds, 0, 0, &tv) <= 0 || !FD_ISSET(fd, &fds)) |
402 | break; |
403 | |
404 | n=read(fd, eg->buffer, sizeof(eg->buffer)); |
405 | if (n <= 0) |
406 | break; |
407 | |
408 | eg->buf_ptr=eg->buffer; |
409 | eg->buf_left=n; |
410 | |
411 | --eg->buf_left; |
412 | return (unsigned char)*(eg->buf_ptr)++; |
413 | } |
414 | return EOF; |
415 | } |
416 | |
417 | static int readline(int fd, struct enum_getch *eg, |
418 | char *buf, |
419 | size_t bufsize) |
420 | { |
421 | if (bufsize == 0) |
422 | return EOF; |
423 | |
424 | while (--bufsize) |
425 | { |
426 | int ch=getauthc(fd, eg); |
427 | |
428 | if (ch == EOF) |
429 | return -1; |
430 | if (ch == '\n') |
431 | break; |
432 | |
433 | *buf++=ch; |
434 | } |
435 | *buf=0; |
436 | return 0; |
437 | } |
438 | |
439 | int _auth_enumerate(int wrfd, int rdfd, |
440 | void(*cb_func)(const char *name, |
441 | uid_t uid, |
442 | gid_t gid, |
443 | const char *homedir, |
444 | const char *maildir, |
445 | const char *options, |
446 | void *void_arg), |
447 | void *void_arg) |
448 | { |
449 | static char cmd[]="ENUMERATE\n"; |
450 | struct enum_getch eg; |
451 | char linebuf[BUFSIZ]; |
452 | |
453 | if (writeauth(wrfd, cmd, sizeof(cmd)-1)) |
454 | { |
455 | return 1; |
456 | } |
457 | |
458 | eg.buf_left=0; |
459 | |
460 | while (readline(rdfd, &eg, linebuf, sizeof(linebuf)) == 0) |
461 | { |
462 | char *p; |
463 | const char *name; |
464 | uid_t uid; |
465 | gid_t gid; |
466 | const char *homedir; |
467 | const char *maildir; |
468 | const char *options; |
469 | |
470 | if (strcmp(linebuf, ".") == 0) |
471 | { |
472 | (*cb_func)(NULL, 0, 0, NULL, NULL, NULL, void_arg); |
473 | return 0; |
474 | } |
475 | |
476 | p=strchr(linebuf, '#'); |
477 | if (p) *p=0; |
478 | |
479 | p=strchr(linebuf, '\t'); |
480 | |
481 | if (p) |
482 | { |
483 | name=linebuf; |
484 | *p++=0; |
485 | |
486 | uid=libmail_atouid_t(p); |
487 | p=strchr(p, '\t'); |
488 | if (uid && p) |
489 | { |
490 | *p++=0; |
491 | gid=libmail_atogid_t(p); |
492 | p=strchr(p, '\t'); |
493 | if (gid && p) |
494 | { |
495 | *p++=0; |
496 | homedir=p; |
497 | p=strchr(p, '\t'); |
498 | maildir=NULL; |
499 | options=NULL; |
500 | |
501 | if (p) |
502 | { |
503 | *p++=0; |
504 | maildir=p; |
505 | p=strchr(p, '\t'); |
506 | |
507 | if (p) |
508 | { |
509 | *p++=0; |
510 | options=p; |
511 | p=strchr(p, '\t'); |
512 | if (p) *p=0; |
513 | } |
514 | } |
515 | |
516 | |
517 | (*cb_func)(name, uid, gid, homedir, |
518 | maildir, options, void_arg); |
519 | } |
520 | } |
521 | } |
522 | } |
523 | return 1; |
524 | } |
525 | |
526 | void auth_enumerate( void(*cb_func)(const char *name, |
527 | uid_t uid, |
528 | gid_t gid, |
529 | const char *homedir, |
530 | const char *maildir, |
531 | const char *options, |
532 | void *void_arg), |
533 | void *void_arg) |
534 | { |
535 | int s=opensock(); |
536 | |
537 | if (s < 0) |
538 | return; |
539 | |
540 | _auth_enumerate(s, s, cb_func, void_arg); |
541 | |
542 | close(s); |
543 | } |