Commit | Line | Data |
---|---|---|
9c0f2dac | 1 | /* pop.c: client routines for talking to a POP3-protocol post-office server |
a27738b6 | 2 | Copyright (c) 1991, 1993, 1996, 1997 Free Software Foundation, Inc. |
9c0f2dac RS |
3 | Written by Jonathan Kamens, jik@security.ov.com. |
4 | ||
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
9c0f2dac | 21 | |
8148baf9 RS |
22 | #ifdef HAVE_CONFIG_H |
23 | #define NO_SHORTNAMES /* Tell config not to load remap.h */ | |
c9c3d8f6 | 24 | #include <../src/config.h> |
8148baf9 RS |
25 | #else |
26 | #define MAIL_USE_POP | |
27 | #endif | |
c9c3d8f6 | 28 | |
8148baf9 RS |
29 | #ifdef MAIL_USE_POP |
30 | ||
31 | #ifdef HAVE_CONFIG_H | |
32 | /* Cancel these substitutions made in config.h */ | |
33 | #undef open | |
6d683104 RS |
34 | #undef read |
35 | #undef write | |
8148baf9 RS |
36 | #undef close |
37 | #endif | |
9c0f2dac RS |
38 | |
39 | #include <sys/types.h> | |
c2668a61 RS |
40 | #ifdef WINDOWSNT |
41 | #include "ntlib.h" | |
42 | #include <winsock.h> | |
43 | #undef SOCKET_ERROR | |
de5c39cf RS |
44 | #define RECV(s,buf,len,flags) recv(s,buf,len,flags) |
45 | #define SEND(s,buf,len,flags) send(s,buf,len,flags) | |
46 | #define CLOSESOCKET(s) closesocket(s) | |
c2668a61 | 47 | #else |
9c0f2dac RS |
48 | #include <netinet/in.h> |
49 | #include <sys/socket.h> | |
de5c39cf RS |
50 | #define RECV(s,buf,len,flags) read(s,buf,len) |
51 | #define SEND(s,buf,len,flags) write(s,buf,len) | |
52 | #define CLOSESOCKET(s) close(s) | |
c2668a61 | 53 | #endif |
9c0f2dac | 54 | #include <pop.h> |
625ad89f | 55 | |
9c0f2dac RS |
56 | #ifdef sun |
57 | #include <malloc.h> | |
8148baf9 | 58 | #endif /* sun */ |
625ad89f | 59 | |
9c0f2dac RS |
60 | #ifdef HESIOD |
61 | #include <hesiod.h> | |
62 | /* | |
63 | * It really shouldn't be necessary to put this declaration here, but | |
64 | * the version of hesiod.h that Athena has installed in release 7.2 | |
65 | * doesn't declare this function; I don't know if the 7.3 version of | |
66 | * hesiod.h does. | |
67 | */ | |
68 | extern struct servent *hes_getservbyname (/* char *, char * */); | |
69 | #endif | |
625ad89f | 70 | |
9c0f2dac | 71 | #include <pwd.h> |
9c0f2dac RS |
72 | #include <netdb.h> |
73 | #include <errno.h> | |
74 | #include <stdio.h> | |
a27738b6 RS |
75 | #ifdef STDC_HEADERS |
76 | #include <string.h> | |
020d3015 KH |
77 | #define index strchr |
78 | #endif | |
79 | #ifdef STDC_HEADERS | |
80 | #include <stdlib.h> | |
81 | #endif | |
82 | #ifdef HAVE_UNISTD_H | |
83 | #include <unistd.h> | |
a27738b6 | 84 | #endif |
625ad89f | 85 | |
9c0f2dac | 86 | #ifdef KERBEROS |
a27738b6 RS |
87 | # ifdef HAVE_KRB5_H |
88 | # include <krb5.h> | |
89 | # endif | |
90 | # ifdef HAVE_DES_H | |
91 | # include <des.h> | |
92 | # else | |
93 | # ifdef HAVE_KERBEROSIV_DES_H | |
94 | # include <kerberosIV/des.h> | |
95 | # else | |
96 | # ifdef HAVE_KERBEROS_DES_H | |
97 | # include <kerberos/des.h> | |
98 | # endif | |
99 | # endif | |
100 | # endif | |
101 | # ifdef HAVE_KRB_H | |
102 | # include <krb.h> | |
103 | # else | |
104 | # ifdef HAVE_KERBEROSIV_KRB_H | |
105 | # include <kerberosIV/krb.h> | |
106 | # else | |
107 | # ifdef HAVE_KERBEROS_KRB_H | |
108 | # include <kerberos/krb.h> | |
109 | # endif | |
110 | # endif | |
111 | # endif | |
112 | # ifdef HAVE_COM_ERR_H | |
113 | # include <com_err.h> | |
114 | # endif | |
8148baf9 | 115 | #endif /* KERBEROS */ |
9c0f2dac | 116 | |
8148baf9 | 117 | #ifdef KERBEROS |
a27738b6 | 118 | #ifndef KERBEROS5 |
9c0f2dac | 119 | extern int krb_sendauth (/* long, int, KTEXT, char *, char *, char *, |
8148baf9 RS |
120 | u_long, MSG_DAT *, CREDENTIALS *, Key_schedule, |
121 | struct sockaddr_in *, struct sockaddr_in *, | |
122 | char * */); | |
9c0f2dac | 123 | extern char *krb_realmofhost (/* char * */); |
a27738b6 | 124 | #endif /* ! KERBEROS5 */ |
8148baf9 | 125 | #endif /* KERBEROS */ |
9c0f2dac | 126 | |
c2668a61 | 127 | #ifndef WINDOWSNT |
8148baf9 | 128 | #if !defined(HAVE_H_ERRNO) || !defined(HAVE_CONFIG_H) |
9c0f2dac RS |
129 | extern int h_errno; |
130 | #endif | |
c2668a61 | 131 | #endif |
9c0f2dac | 132 | |
d89d0243 KH |
133 | #ifndef _P |
134 | # ifdef __STDC__ | |
135 | # define _P(a) a | |
136 | # else | |
137 | # define _P(a) () | |
138 | # endif /* __STDC__ */ | |
139 | #endif /* ! __P */ | |
140 | ||
141 | static int socket_connection _P((char *, int)); | |
60b0a379 | 142 | static int pop_getline _P((popserver, char **)); |
d89d0243 KH |
143 | static int sendline _P((popserver, char *)); |
144 | static int fullwrite _P((int, char *, int)); | |
145 | static int getok _P((popserver)); | |
9c0f2dac | 146 | #if 0 |
d89d0243 | 147 | static int gettermination _P((popserver)); |
9c0f2dac | 148 | #endif |
d89d0243 KH |
149 | static void pop_trash _P((popserver)); |
150 | static char *find_crlf _P((char *, int)); | |
7a481e50 | 151 | |
9c0f2dac RS |
152 | #define ERROR_MAX 80 /* a pretty arbitrary size */ |
153 | #define POP_PORT 110 | |
154 | #define KPOP_PORT 1109 | |
c2668a61 RS |
155 | #ifdef WINDOWSNT |
156 | #define POP_SERVICE "pop3" /* we don't want the POP2 port! */ | |
157 | #else | |
9c0f2dac | 158 | #define POP_SERVICE "pop" |
c2668a61 | 159 | #endif |
9c0f2dac | 160 | #ifdef KERBEROS |
9c0f2dac RS |
161 | #define KPOP_SERVICE "kpop" |
162 | #endif | |
9c0f2dac | 163 | |
0ea95737 KH |
164 | #ifdef GSSAPI |
165 | # ifdef HAVE_GSSAPI_H | |
166 | # include <gssapi.h> | |
167 | # else | |
168 | # include <gssapi/gssapi.h> | |
169 | # endif | |
170 | #define GSSAPI_SERVICE "pop" | |
171 | static int pop_auth (/* popserver server, char *user, | |
172 | char *host, int flags */); | |
173 | static void gen_gss_error (/* char *msg, OM_uint32 major, OM_uint32 minor */); | |
174 | struct _pop_gssapi | |
175 | { | |
176 | int gss_flags; /* encryption? integrity protection? */ | |
177 | OM_uint32 max_size; /* max size we can send the server */ | |
178 | gss_ctx_id_t gss_context; /* the security context */ | |
179 | }; | |
180 | #define GSSAPI_NOPROT 0x01 | |
181 | #define GSSAPI_INTEGRITY 0x02 | |
182 | #define GSSAPI_PRIVACY 0x04 | |
183 | #define GSSAPI_NEEDWRAP (GSSAPI_INTEGRITY|GSSAPI_PRIVACY) | |
184 | #define GSSAPI_PROTECTION (GSSAPI_NOPROT|GSSAPI_INTEGRITY|GSSAPI_PRIVACY) | |
185 | #define GSSAPI_RCVBUF 1024 | |
186 | #define GSSAPI_SVC_TYPE {10, "\052\206\110\206\367\022\001\002\001\004"} | |
187 | #define Gssapi(data) ((struct _pop_gssapi *) (data)) | |
188 | ||
189 | static int b64_decode (/* char *enc, gss_buffer_t dec */); | |
190 | static int b64_encode (/* gss_buffer_t dec, char **enc */); | |
191 | #define B64_SUCCESS 0 | |
192 | #define B64_BADPARAM 1 | |
193 | #define B64_BADCHAR 2 | |
194 | #define B64_BADPAD 3 | |
195 | #define B64_BADLEN 4 | |
196 | #define B64_NOMEM 5 | |
197 | static char *b64_error[] = | |
198 | { | |
199 | "Success", | |
200 | "Bad parameters", | |
201 | "Bad characters in encoding", | |
202 | "Bad padding in encoding", | |
203 | "Bad length", | |
204 | "Out of memory" | |
205 | }; | |
206 | ||
207 | /* | |
208 | * This function is only needed if you are using the GSSAPI protection | |
209 | * mechanisms; it keeps trying until it has read the requested number | |
210 | * bytes from the passed-in fd. | |
211 | */ | |
212 | static int fullread (/* int fd, char *buf, int nbytes */); | |
213 | #endif /* GSSAPI */ | |
214 | ||
9c0f2dac RS |
215 | char pop_error[ERROR_MAX]; |
216 | int pop_debug = 0; | |
217 | ||
218 | #ifndef min | |
219 | #define min(a,b) (((a) < (b)) ? (a) : (b)) | |
220 | #endif | |
221 | ||
222 | /* | |
223 | * Function: pop_open (char *host, char *username, char *password, | |
224 | * int flags) | |
225 | * | |
226 | * Purpose: Establishes a connection with a post-office server, and | |
227 | * completes the authorization portion of the session. | |
228 | * | |
229 | * Arguments: | |
230 | * host The server host with which the connection should be | |
231 | * established. Optional. If omitted, internal | |
232 | * heuristics will be used to determine the server host, | |
233 | * if possible. | |
234 | * username | |
235 | * The username of the mail-drop to access. Optional. | |
236 | * If omitted, internal heuristics will be used to | |
237 | * determine the username, if possible. | |
238 | * password | |
239 | * The password to use for authorization. If omitted, | |
240 | * internal heuristics will be used to determine the | |
241 | * password, if possible. | |
242 | * flags A bit mask containing flags controlling certain | |
243 | * functions of the routine. Valid flags are defined in | |
244 | * the file pop.h | |
245 | * | |
246 | * Return value: Upon successful establishment of a connection, a | |
247 | * non-null popserver will be returned. Otherwise, null will be | |
248 | * returned, and the string variable pop_error will contain an | |
249 | * explanation of the error. | |
250 | */ | |
251 | popserver | |
252 | pop_open (host, username, password, flags) | |
253 | char *host; | |
254 | char *username; | |
255 | char *password; | |
256 | int flags; | |
257 | { | |
258 | int sock; | |
259 | popserver server; | |
260 | ||
261 | /* Determine the user name */ | |
262 | if (! username) | |
263 | { | |
264 | username = getenv ("USER"); | |
265 | if (! (username && *username)) | |
266 | { | |
267 | username = getlogin (); | |
268 | if (! (username && *username)) | |
269 | { | |
270 | struct passwd *passwd; | |
271 | passwd = getpwuid (getuid ()); | |
272 | if (passwd && passwd->pw_name && *passwd->pw_name) | |
273 | { | |
274 | username = passwd->pw_name; | |
275 | } | |
276 | else | |
277 | { | |
278 | strcpy (pop_error, "Could not determine username"); | |
279 | return (0); | |
280 | } | |
281 | } | |
282 | } | |
283 | } | |
284 | ||
285 | /* | |
286 | * Determine the mail host. | |
287 | */ | |
288 | ||
289 | if (! host) | |
290 | { | |
291 | host = getenv ("MAILHOST"); | |
292 | } | |
293 | ||
294 | #ifdef HESIOD | |
295 | if ((! host) && (! (flags & POP_NO_HESIOD))) | |
296 | { | |
297 | struct hes_postoffice *office; | |
298 | office = hes_getmailhost (username); | |
299 | if (office && office->po_type && (! strcmp (office->po_type, "POP")) | |
300 | && office->po_name && *office->po_name && office->po_host | |
301 | && *office->po_host) | |
302 | { | |
303 | host = office->po_host; | |
304 | username = office->po_name; | |
305 | } | |
306 | } | |
307 | #endif | |
308 | ||
309 | #ifdef MAILHOST | |
310 | if (! host) | |
311 | { | |
312 | host = MAILHOST; | |
313 | } | |
314 | #endif | |
315 | ||
316 | if (! host) | |
317 | { | |
318 | strcpy (pop_error, "Could not determine POP server"); | |
319 | return (0); | |
320 | } | |
321 | ||
322 | /* Determine the password */ | |
0ea95737 KH |
323 | #if defined(KERBEROS) || defined(GSSAPI) |
324 | # ifdef KERBEROS | |
325 | # define NO_KERBEROS POP_NO_KERBEROS | |
326 | # else | |
327 | # define NO_KERBEROS 0 | |
328 | # endif /* KERBEROS */ | |
329 | ||
330 | # ifdef GSSAPI | |
331 | # define NO_GSSAPI POP_NO_GSSAPI | |
332 | # else | |
333 | # define NO_GSSAPI 0 | |
334 | # endif /* GSSAPI */ | |
335 | ||
336 | # define DONT_NEED_PASSWORD (! (flags & (NO_KERBEROS | NO_GSSAPI))) | |
9c0f2dac | 337 | #else |
0ea95737 | 338 | # define DONT_NEED_PASSWORD 0 |
9c0f2dac RS |
339 | #endif |
340 | ||
341 | if ((! password) && (! DONT_NEED_PASSWORD)) | |
342 | { | |
343 | if (! (flags & POP_NO_GETPASS)) | |
344 | { | |
345 | password = getpass ("Enter POP password:"); | |
346 | } | |
347 | if (! password) | |
348 | { | |
349 | strcpy (pop_error, "Could not determine POP password"); | |
350 | return (0); | |
351 | } | |
352 | } | |
353 | if (password) | |
0ea95737 | 354 | flags |= POP_NO_KERBEROS | (!(flags & POP_NO_NOPROT) ? POP_NO_GSSAPI : 0); |
9c0f2dac RS |
355 | else |
356 | password = username; | |
357 | ||
358 | sock = socket_connection (host, flags); | |
359 | if (sock == -1) | |
360 | return (0); | |
361 | ||
362 | server = (popserver) malloc (sizeof (struct _popserver)); | |
363 | if (! server) | |
364 | { | |
365 | strcpy (pop_error, "Out of memory in pop_open"); | |
366 | return (0); | |
367 | } | |
368 | server->buffer = (char *) malloc (GETLINE_MIN); | |
369 | if (! server->buffer) | |
370 | { | |
371 | strcpy (pop_error, "Out of memory in pop_open"); | |
372 | free ((char *) server); | |
373 | return (0); | |
374 | } | |
375 | ||
376 | server->file = sock; | |
377 | server->data = 0; | |
378 | server->buffer_index = 0; | |
379 | server->buffer_size = GETLINE_MIN; | |
380 | server->in_multi = 0; | |
c2668a61 | 381 | server->trash_started = 0; |
0ea95737 | 382 | server->extra = 0; |
9c0f2dac RS |
383 | |
384 | if (getok (server)) | |
385 | return (0); | |
386 | ||
0ea95737 KH |
387 | #ifdef GSSAPI |
388 | /* | |
389 | * unless forbidden to use GSSAPI, try the GSSAPI AUTH mechanism..first. | |
390 | */ | |
391 | pop_error[0] = '\0'; /* so we can detect errors later... */ | |
392 | if (! (flags & POP_NO_GSSAPI)) | |
393 | { | |
394 | int ret; | |
395 | ||
396 | ret = pop_auth (server, username, host, flags); | |
397 | if (ret == 0) | |
398 | { | |
399 | return (server); | |
400 | } | |
401 | else if (ret == -2) | |
402 | { | |
403 | pop_close (server); | |
404 | return (0); | |
405 | } | |
406 | } | |
407 | #endif /* GSSAPI */ | |
408 | /* | |
409 | * POP_NO_NOPROT is used in the case that we want protection; if | |
410 | * the authentication negotiation failed, then we want to fail now. | |
411 | */ | |
412 | if ((flags & POP_NO_NOPROT)) | |
413 | { | |
414 | pop_close (server); | |
415 | #ifdef GSSAPI | |
416 | if (pop_error[0] == '\0') | |
417 | #endif | |
418 | strcpy (pop_error, "Unable to provide protection"); | |
419 | return (0); | |
420 | } | |
421 | ||
9c0f2dac RS |
422 | /* |
423 | * I really shouldn't use the pop_error variable like this, but.... | |
424 | */ | |
425 | if (strlen (username) > ERROR_MAX - 6) | |
426 | { | |
427 | pop_close (server); | |
428 | strcpy (pop_error, | |
429 | "Username too long; recompile pop.c with larger ERROR_MAX"); | |
430 | return (0); | |
431 | } | |
432 | sprintf (pop_error, "USER %s", username); | |
433 | ||
434 | if (sendline (server, pop_error) || getok (server)) | |
435 | { | |
436 | return (0); | |
437 | } | |
438 | ||
439 | if (strlen (password) > ERROR_MAX - 6) | |
440 | { | |
441 | pop_close (server); | |
442 | strcpy (pop_error, | |
443 | "Password too long; recompile pop.c with larger ERROR_MAX"); | |
444 | return (0); | |
445 | } | |
446 | sprintf (pop_error, "PASS %s", password); | |
447 | ||
448 | if (sendline (server, pop_error) || getok (server)) | |
449 | { | |
450 | return (0); | |
451 | } | |
452 | ||
453 | return (server); | |
454 | } | |
455 | ||
456 | /* | |
457 | * Function: pop_stat | |
458 | * | |
459 | * Purpose: Issue the STAT command to the server and return (in the | |
460 | * value parameters) the number of messages in the maildrop and | |
461 | * the total size of the maildrop. | |
462 | * | |
463 | * Return value: 0 on success, or non-zero with an error in pop_error | |
464 | * in failure. | |
465 | * | |
466 | * Side effects: On failure, may make further operations on the | |
467 | * connection impossible. | |
468 | */ | |
469 | int | |
470 | pop_stat (server, count, size) | |
471 | popserver server; | |
472 | int *count; | |
473 | int *size; | |
474 | { | |
475 | char *fromserver; | |
476 | ||
477 | if (server->in_multi) | |
478 | { | |
479 | strcpy (pop_error, "In multi-line query in pop_stat"); | |
480 | return (-1); | |
481 | } | |
482 | ||
60b0a379 | 483 | if (sendline (server, "STAT") || (pop_getline (server, &fromserver) < 0)) |
9c0f2dac RS |
484 | return (-1); |
485 | ||
486 | if (strncmp (fromserver, "+OK ", 4)) | |
487 | { | |
488 | if (0 == strncmp (fromserver, "-ERR", 4)) | |
489 | { | |
490 | strncpy (pop_error, fromserver, ERROR_MAX); | |
491 | } | |
492 | else | |
493 | { | |
494 | strcpy (pop_error, | |
495 | "Unexpected response from POP server in pop_stat"); | |
496 | pop_trash (server); | |
497 | } | |
498 | return (-1); | |
499 | } | |
500 | ||
501 | *count = atoi (&fromserver[4]); | |
502 | ||
503 | fromserver = index (&fromserver[4], ' '); | |
504 | if (! fromserver) | |
505 | { | |
506 | strcpy (pop_error, | |
507 | "Badly formatted response from server in pop_stat"); | |
508 | pop_trash (server); | |
509 | return (-1); | |
510 | } | |
511 | ||
512 | *size = atoi (fromserver + 1); | |
513 | ||
514 | return (0); | |
515 | } | |
516 | ||
517 | /* | |
518 | * Function: pop_list | |
519 | * | |
520 | * Purpose: Performs the POP "list" command and returns (in value | |
521 | * parameters) two malloc'd zero-terminated arrays -- one of | |
522 | * message IDs, and a parallel one of sizes. | |
523 | * | |
524 | * Arguments: | |
525 | * server The pop connection to talk to. | |
526 | * message The number of the one message about which to get | |
527 | * information, or 0 to get information about all | |
528 | * messages. | |
529 | * | |
530 | * Return value: 0 on success, non-zero with error in pop_error on | |
531 | * failure. | |
532 | * | |
533 | * Side effects: On failure, may make further operations on the | |
534 | * connection impossible. | |
535 | */ | |
536 | int | |
537 | pop_list (server, message, IDs, sizes) | |
538 | popserver server; | |
539 | int message; | |
540 | int **IDs; | |
541 | int **sizes; | |
542 | { | |
543 | int how_many, i; | |
544 | char *fromserver; | |
545 | ||
546 | if (server->in_multi) | |
547 | { | |
548 | strcpy (pop_error, "In multi-line query in pop_list"); | |
549 | return (-1); | |
550 | } | |
551 | ||
552 | if (message) | |
553 | how_many = 1; | |
554 | else | |
555 | { | |
556 | int count, size; | |
557 | if (pop_stat (server, &count, &size)) | |
558 | return (-1); | |
559 | how_many = count; | |
560 | } | |
561 | ||
562 | *IDs = (int *) malloc ((how_many + 1) * sizeof (int)); | |
563 | *sizes = (int *) malloc ((how_many + 1) * sizeof (int)); | |
564 | if (! (*IDs && *sizes)) | |
565 | { | |
566 | strcpy (pop_error, "Out of memory in pop_list"); | |
567 | return (-1); | |
568 | } | |
569 | ||
570 | if (message) | |
571 | { | |
572 | sprintf (pop_error, "LIST %d", message); | |
573 | if (sendline (server, pop_error)) | |
574 | { | |
575 | free ((char *) *IDs); | |
576 | free ((char *) *sizes); | |
577 | return (-1); | |
578 | } | |
60b0a379 | 579 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
580 | { |
581 | free ((char *) *IDs); | |
582 | free ((char *) *sizes); | |
583 | return (-1); | |
584 | } | |
585 | if (strncmp (fromserver, "+OK ", 4)) | |
586 | { | |
587 | if (! strncmp (fromserver, "-ERR", 4)) | |
588 | strncpy (pop_error, fromserver, ERROR_MAX); | |
589 | else | |
590 | { | |
591 | strcpy (pop_error, | |
592 | "Unexpected response from server in pop_list"); | |
593 | pop_trash (server); | |
594 | } | |
595 | free ((char *) *IDs); | |
596 | free ((char *) *sizes); | |
597 | return (-1); | |
598 | } | |
599 | (*IDs)[0] = atoi (&fromserver[4]); | |
600 | fromserver = index (&fromserver[4], ' '); | |
601 | if (! fromserver) | |
602 | { | |
603 | strcpy (pop_error, | |
604 | "Badly formatted response from server in pop_list"); | |
605 | pop_trash (server); | |
606 | free ((char *) *IDs); | |
607 | free ((char *) *sizes); | |
608 | return (-1); | |
609 | } | |
610 | (*sizes)[0] = atoi (fromserver); | |
611 | (*IDs)[1] = (*sizes)[1] = 0; | |
612 | return (0); | |
613 | } | |
614 | else | |
615 | { | |
616 | if (pop_multi_first (server, "LIST", &fromserver)) | |
617 | { | |
618 | free ((char *) *IDs); | |
619 | free ((char *) *sizes); | |
620 | return (-1); | |
621 | } | |
622 | for (i = 0; i < how_many; i++) | |
623 | { | |
d89d0243 | 624 | if (pop_multi_next (server, &fromserver) <= 0) |
9c0f2dac RS |
625 | { |
626 | free ((char *) *IDs); | |
627 | free ((char *) *sizes); | |
628 | return (-1); | |
629 | } | |
630 | (*IDs)[i] = atoi (fromserver); | |
631 | fromserver = index (fromserver, ' '); | |
632 | if (! fromserver) | |
633 | { | |
634 | strcpy (pop_error, | |
635 | "Badly formatted response from server in pop_list"); | |
636 | free ((char *) *IDs); | |
637 | free ((char *) *sizes); | |
638 | pop_trash (server); | |
639 | return (-1); | |
640 | } | |
641 | (*sizes)[i] = atoi (fromserver); | |
642 | } | |
d89d0243 | 643 | if (pop_multi_next (server, &fromserver) < 0) |
9c0f2dac RS |
644 | { |
645 | free ((char *) *IDs); | |
646 | free ((char *) *sizes); | |
647 | return (-1); | |
648 | } | |
649 | else if (fromserver) | |
650 | { | |
651 | strcpy (pop_error, | |
652 | "Too many response lines from server in pop_list"); | |
653 | free ((char *) *IDs); | |
654 | free ((char *) *sizes); | |
655 | return (-1); | |
656 | } | |
657 | (*IDs)[i] = (*sizes)[i] = 0; | |
658 | return (0); | |
659 | } | |
660 | } | |
661 | ||
662 | /* | |
663 | * Function: pop_retrieve | |
664 | * | |
665 | * Purpose: Retrieve a specified message from the maildrop. | |
666 | * | |
667 | * Arguments: | |
668 | * server The server to retrieve from. | |
669 | * message The message number to retrieve. | |
670 | * markfrom | |
671 | * If true, then mark the string "From " at the beginning | |
672 | * of lines with '>'. | |
d89d0243 KH |
673 | * msg_buf Output parameter to which a buffer containing the |
674 | * message is assigned. | |
9c0f2dac | 675 | * |
d89d0243 KH |
676 | * Return value: The number of bytes in msg_buf, which may contain |
677 | * embedded nulls, not including its final null, or -1 on error | |
678 | * with pop_error set. | |
9c0f2dac RS |
679 | * |
680 | * Side effects: May kill connection on error. | |
681 | */ | |
d89d0243 KH |
682 | int |
683 | pop_retrieve (server, message, markfrom, msg_buf) | |
9c0f2dac RS |
684 | popserver server; |
685 | int message; | |
686 | int markfrom; | |
d89d0243 | 687 | char **msg_buf; |
9c0f2dac RS |
688 | { |
689 | int *IDs, *sizes, bufsize, fromcount = 0, cp = 0; | |
690 | char *ptr, *fromserver; | |
691 | int ret; | |
692 | ||
693 | if (server->in_multi) | |
694 | { | |
695 | strcpy (pop_error, "In multi-line query in pop_retrieve"); | |
d89d0243 | 696 | return (-1); |
9c0f2dac RS |
697 | } |
698 | ||
699 | if (pop_list (server, message, &IDs, &sizes)) | |
d89d0243 | 700 | return (-1); |
9c0f2dac RS |
701 | |
702 | if (pop_retrieve_first (server, message, &fromserver)) | |
703 | { | |
d89d0243 | 704 | return (-1); |
9c0f2dac RS |
705 | } |
706 | ||
707 | /* | |
708 | * The "5" below is an arbitrary constant -- I assume that if | |
709 | * there are "From" lines in the text to be marked, there | |
710 | * probably won't be more than 5 of them. If there are, I | |
711 | * allocate more space for them below. | |
712 | */ | |
713 | bufsize = sizes[0] + (markfrom ? 5 : 0); | |
7d665945 | 714 | ptr = (char *)malloc (bufsize); |
9c0f2dac RS |
715 | free ((char *) IDs); |
716 | free ((char *) sizes); | |
717 | ||
718 | if (! ptr) | |
719 | { | |
720 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
721 | pop_retrieve_flush (server); | |
d89d0243 | 722 | return (-1); |
9c0f2dac RS |
723 | } |
724 | ||
d89d0243 | 725 | while ((ret = pop_retrieve_next (server, &fromserver)) >= 0) |
9c0f2dac | 726 | { |
9c0f2dac RS |
727 | if (! fromserver) |
728 | { | |
729 | ptr[cp] = '\0'; | |
d89d0243 KH |
730 | *msg_buf = ptr; |
731 | return (cp); | |
9c0f2dac RS |
732 | } |
733 | if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' && | |
734 | fromserver[2] == 'o' && fromserver[3] == 'm' && | |
735 | fromserver[4] == ' ') | |
736 | { | |
737 | if (++fromcount == 5) | |
738 | { | |
739 | bufsize += 5; | |
7d665945 | 740 | ptr = (char *)realloc (ptr, bufsize); |
9c0f2dac RS |
741 | if (! ptr) |
742 | { | |
743 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
744 | pop_retrieve_flush (server); | |
d89d0243 | 745 | return (-1); |
9c0f2dac RS |
746 | } |
747 | fromcount = 0; | |
748 | } | |
749 | ptr[cp++] = '>'; | |
750 | } | |
d89d0243 KH |
751 | bcopy (fromserver, &ptr[cp], ret); |
752 | cp += ret; | |
9c0f2dac RS |
753 | ptr[cp++] = '\n'; |
754 | } | |
755 | ||
d89d0243 KH |
756 | free (ptr); |
757 | return (-1); | |
9c0f2dac RS |
758 | } |
759 | ||
760 | int | |
761 | pop_retrieve_first (server, message, response) | |
762 | popserver server; | |
763 | int message; | |
764 | char **response; | |
765 | { | |
766 | sprintf (pop_error, "RETR %d", message); | |
767 | return (pop_multi_first (server, pop_error, response)); | |
768 | } | |
769 | ||
d89d0243 KH |
770 | /* |
771 | Returns a negative number on error, 0 to indicate that the data has | |
772 | all been read (i.e., the server has returned a "." termination | |
773 | line), or a positive number indicating the number of bytes in the | |
774 | returned buffer (which is null-terminated and may contain embedded | |
775 | nulls, but the returned bytecount doesn't include the final null). | |
776 | */ | |
777 | ||
9c0f2dac RS |
778 | int |
779 | pop_retrieve_next (server, line) | |
780 | popserver server; | |
781 | char **line; | |
782 | { | |
783 | return (pop_multi_next (server, line)); | |
784 | } | |
785 | ||
786 | int | |
787 | pop_retrieve_flush (server) | |
788 | popserver server; | |
789 | { | |
790 | return (pop_multi_flush (server)); | |
791 | } | |
792 | ||
793 | int | |
794 | pop_top_first (server, message, lines, response) | |
795 | popserver server; | |
796 | int message, lines; | |
797 | char **response; | |
798 | { | |
799 | sprintf (pop_error, "TOP %d %d", message, lines); | |
800 | return (pop_multi_first (server, pop_error, response)); | |
801 | } | |
802 | ||
d89d0243 KH |
803 | /* |
804 | Returns a negative number on error, 0 to indicate that the data has | |
805 | all been read (i.e., the server has returned a "." termination | |
806 | line), or a positive number indicating the number of bytes in the | |
807 | returned buffer (which is null-terminated and may contain embedded | |
808 | nulls, but the returned bytecount doesn't include the final null). | |
809 | */ | |
810 | ||
9c0f2dac RS |
811 | int |
812 | pop_top_next (server, line) | |
813 | popserver server; | |
814 | char **line; | |
815 | { | |
816 | return (pop_multi_next (server, line)); | |
817 | } | |
818 | ||
819 | int | |
820 | pop_top_flush (server) | |
821 | popserver server; | |
822 | { | |
823 | return (pop_multi_flush (server)); | |
824 | } | |
825 | ||
826 | int | |
827 | pop_multi_first (server, command, response) | |
828 | popserver server; | |
829 | char *command; | |
830 | char **response; | |
831 | { | |
832 | if (server->in_multi) | |
833 | { | |
834 | strcpy (pop_error, | |
835 | "Already in multi-line query in pop_multi_first"); | |
836 | return (-1); | |
837 | } | |
838 | ||
60b0a379 | 839 | if (sendline (server, command) || (pop_getline (server, response) < 0)) |
9c0f2dac RS |
840 | { |
841 | return (-1); | |
842 | } | |
843 | ||
844 | if (0 == strncmp (*response, "-ERR", 4)) | |
845 | { | |
846 | strncpy (pop_error, *response, ERROR_MAX); | |
847 | return (-1); | |
848 | } | |
849 | else if (0 == strncmp (*response, "+OK", 3)) | |
850 | { | |
851 | for (*response += 3; **response == ' '; (*response)++) /* empty */; | |
852 | server->in_multi = 1; | |
853 | return (0); | |
854 | } | |
855 | else | |
856 | { | |
857 | strcpy (pop_error, | |
858 | "Unexpected response from server in pop_multi_first"); | |
859 | return (-1); | |
860 | } | |
861 | } | |
862 | ||
d89d0243 KH |
863 | /* |
864 | Read the next line of data from SERVER and place a pointer to it | |
865 | into LINE. Return -1 on error, 0 if there are no more lines to read | |
866 | (i.e., the server has returned a line containing only "."), or a | |
867 | positive number indicating the number of bytes in the LINE buffer | |
868 | (not including the final null). The data in that buffer may contain | |
869 | embedded nulls, but does not contain the final CRLF. When returning | |
870 | 0, LINE is set to null. */ | |
871 | ||
9c0f2dac RS |
872 | int |
873 | pop_multi_next (server, line) | |
874 | popserver server; | |
875 | char **line; | |
876 | { | |
877 | char *fromserver; | |
d89d0243 | 878 | int ret; |
9c0f2dac RS |
879 | |
880 | if (! server->in_multi) | |
881 | { | |
882 | strcpy (pop_error, "Not in multi-line query in pop_multi_next"); | |
883 | return (-1); | |
884 | } | |
885 | ||
60b0a379 | 886 | if ((ret = pop_getline (server, &fromserver)) < 0) |
9c0f2dac RS |
887 | { |
888 | return (-1); | |
889 | } | |
890 | ||
891 | if (fromserver[0] == '.') | |
892 | { | |
893 | if (! fromserver[1]) | |
894 | { | |
895 | *line = 0; | |
896 | server->in_multi = 0; | |
897 | return (0); | |
898 | } | |
899 | else | |
900 | { | |
901 | *line = fromserver + 1; | |
d89d0243 | 902 | return (ret - 1); |
9c0f2dac RS |
903 | } |
904 | } | |
905 | else | |
906 | { | |
907 | *line = fromserver; | |
d89d0243 | 908 | return (ret); |
9c0f2dac RS |
909 | } |
910 | } | |
911 | ||
912 | int | |
913 | pop_multi_flush (server) | |
914 | popserver server; | |
915 | { | |
916 | char *line; | |
d89d0243 | 917 | int ret; |
9c0f2dac RS |
918 | |
919 | if (! server->in_multi) | |
920 | { | |
921 | return (0); | |
922 | } | |
923 | ||
d89d0243 | 924 | while ((ret = pop_multi_next (server, &line))) |
9c0f2dac | 925 | { |
d89d0243 KH |
926 | if (ret < 0) |
927 | return (-1); | |
9c0f2dac RS |
928 | } |
929 | ||
d89d0243 | 930 | return (0); |
9c0f2dac RS |
931 | } |
932 | ||
933 | /* Function: pop_delete | |
934 | * | |
935 | * Purpose: Delete a specified message. | |
936 | * | |
937 | * Arguments: | |
938 | * server Server from which to delete the message. | |
939 | * message Message to delete. | |
940 | * | |
941 | * Return value: 0 on success, non-zero with error in pop_error | |
942 | * otherwise. | |
943 | */ | |
944 | int | |
945 | pop_delete (server, message) | |
946 | popserver server; | |
947 | int message; | |
948 | { | |
949 | if (server->in_multi) | |
950 | { | |
951 | strcpy (pop_error, "In multi-line query in pop_delete"); | |
952 | return (-1); | |
953 | } | |
954 | ||
955 | sprintf (pop_error, "DELE %d", message); | |
956 | ||
957 | if (sendline (server, pop_error) || getok (server)) | |
958 | return (-1); | |
959 | ||
960 | return (0); | |
961 | } | |
962 | ||
963 | /* | |
964 | * Function: pop_noop | |
965 | * | |
966 | * Purpose: Send a noop command to the server. | |
967 | * | |
968 | * Argument: | |
969 | * server The server to send to. | |
970 | * | |
971 | * Return value: 0 on success, non-zero with error in pop_error | |
972 | * otherwise. | |
973 | * | |
974 | * Side effects: Closes connection on error. | |
975 | */ | |
976 | int | |
977 | pop_noop (server) | |
978 | popserver server; | |
979 | { | |
980 | if (server->in_multi) | |
981 | { | |
982 | strcpy (pop_error, "In multi-line query in pop_noop"); | |
983 | return (-1); | |
984 | } | |
985 | ||
986 | if (sendline (server, "NOOP") || getok (server)) | |
987 | return (-1); | |
988 | ||
989 | return (0); | |
990 | } | |
991 | ||
992 | /* | |
993 | * Function: pop_last | |
994 | * | |
995 | * Purpose: Find out the highest seen message from the server. | |
996 | * | |
997 | * Arguments: | |
998 | * server The server. | |
999 | * | |
1000 | * Return value: If successful, the highest seen message, which is | |
1001 | * greater than or equal to 0. Otherwise, a negative number with | |
1002 | * the error explained in pop_error. | |
1003 | * | |
1004 | * Side effects: Closes the connection on error. | |
1005 | */ | |
1006 | int | |
1007 | pop_last (server) | |
1008 | popserver server; | |
1009 | { | |
1010 | char *fromserver; | |
1011 | ||
1012 | if (server->in_multi) | |
1013 | { | |
1014 | strcpy (pop_error, "In multi-line query in pop_last"); | |
1015 | return (-1); | |
1016 | } | |
1017 | ||
1018 | if (sendline (server, "LAST")) | |
1019 | return (-1); | |
1020 | ||
60b0a379 | 1021 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
1022 | return (-1); |
1023 | ||
1024 | if (! strncmp (fromserver, "-ERR", 4)) | |
1025 | { | |
1026 | strncpy (pop_error, fromserver, ERROR_MAX); | |
1027 | return (-1); | |
1028 | } | |
1029 | else if (strncmp (fromserver, "+OK ", 4)) | |
1030 | { | |
1031 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
1032 | pop_trash (server); | |
1033 | return (-1); | |
1034 | } | |
1035 | else | |
1036 | { | |
1037 | return (atoi (&fromserver[4])); | |
1038 | } | |
1039 | } | |
1040 | ||
1041 | /* | |
1042 | * Function: pop_reset | |
1043 | * | |
1044 | * Purpose: Reset the server to its initial connect state | |
1045 | * | |
1046 | * Arguments: | |
1047 | * server The server. | |
1048 | * | |
1049 | * Return value: 0 for success, non-0 with error in pop_error | |
1050 | * otherwise. | |
1051 | * | |
1052 | * Side effects: Closes the connection on error. | |
1053 | */ | |
1054 | int | |
1055 | pop_reset (server) | |
1056 | popserver server; | |
1057 | { | |
1058 | if (pop_retrieve_flush (server)) | |
1059 | { | |
1060 | return (-1); | |
1061 | } | |
1062 | ||
1063 | if (sendline (server, "RSET") || getok (server)) | |
1064 | return (-1); | |
1065 | ||
1066 | return (0); | |
1067 | } | |
1068 | ||
1069 | /* | |
1070 | * Function: pop_quit | |
1071 | * | |
1072 | * Purpose: Quit the connection to the server, | |
1073 | * | |
1074 | * Arguments: | |
1075 | * server The server to quit. | |
1076 | * | |
1077 | * Return value: 0 for success, non-zero otherwise with error in | |
1078 | * pop_error. | |
1079 | * | |
8e6208c5 | 1080 | * Side Effects: The popserver passed in is unusable after this |
9c0f2dac RS |
1081 | * function is called, even if an error occurs. |
1082 | */ | |
1083 | int | |
1084 | pop_quit (server) | |
1085 | popserver server; | |
1086 | { | |
1087 | int ret = 0; | |
1088 | ||
1089 | if (server->file >= 0) | |
1090 | { | |
1091 | if (pop_retrieve_flush (server)) | |
1092 | { | |
1093 | ret = -1; | |
1094 | } | |
1095 | ||
1096 | if (sendline (server, "QUIT") || getok (server)) | |
1097 | { | |
1098 | ret = -1; | |
1099 | } | |
1100 | ||
1101 | close (server->file); | |
1102 | } | |
1103 | ||
1104 | if (server->buffer) | |
1105 | free (server->buffer); | |
0ea95737 KH |
1106 | #ifdef GSSAPI |
1107 | if (server->extra) | |
1108 | { | |
1109 | OM_uint32 minor; | |
1110 | ||
1111 | if (Gssapi (server->extra)->gss_context != GSS_C_NO_CONTEXT) | |
1112 | gss_delete_sec_context (&minor, &(Gssapi (server->extra)->gss_context), | |
1113 | GSS_C_NO_BUFFER); | |
1114 | free ((char *) server->extra); | |
1115 | } | |
1116 | #endif /* GSSAPI */ | |
9c0f2dac RS |
1117 | free ((char *) server); |
1118 | ||
1119 | return (ret); | |
1120 | } | |
1121 | ||
c2668a61 RS |
1122 | #ifdef WINDOWSNT |
1123 | static int have_winsock = 0; | |
1124 | #endif | |
1125 | ||
9c0f2dac RS |
1126 | /* |
1127 | * Function: socket_connection | |
1128 | * | |
1129 | * Purpose: Opens the network connection with the mail host, without | |
1130 | * doing any sort of I/O with it or anything. | |
1131 | * | |
1132 | * Arguments: | |
1133 | * host The host to which to connect. | |
1134 | * flags Option flags. | |
1135 | * | |
1136 | * Return value: A file descriptor indicating the connection, or -1 | |
1137 | * indicating failure, in which case an error has been copied | |
1138 | * into pop_error. | |
1139 | */ | |
1140 | static int | |
1141 | socket_connection (host, flags) | |
1142 | char *host; | |
1143 | int flags; | |
1144 | { | |
1145 | struct hostent *hostent; | |
1146 | struct servent *servent; | |
1147 | struct sockaddr_in addr; | |
1148 | char found_port = 0; | |
1149 | char *service; | |
1150 | int sock; | |
1151 | #ifdef KERBEROS | |
a27738b6 | 1152 | #ifdef KERBEROS5 |
9c0f2dac | 1153 | krb5_error_code rem; |
a27738b6 RS |
1154 | krb5_context kcontext = 0; |
1155 | krb5_auth_context auth_context = 0; | |
9c0f2dac RS |
1156 | krb5_ccache ccdef; |
1157 | krb5_principal client, server; | |
1158 | krb5_error *err_ret; | |
1159 | register char *cp; | |
1160 | #else | |
1161 | KTEXT ticket; | |
1162 | MSG_DAT msg_data; | |
1163 | CREDENTIALS cred; | |
1164 | Key_schedule schedule; | |
1165 | int rem; | |
51a66525 | 1166 | char *realhost; |
a27738b6 | 1167 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1168 | #endif /* KERBEROS */ |
1169 | ||
1170 | int try_count = 0; | |
1171 | ||
c2668a61 RS |
1172 | #ifdef WINDOWSNT |
1173 | { | |
1174 | WSADATA winsockData; | |
1175 | if (WSAStartup (0x101, &winsockData) == 0) | |
1176 | have_winsock = 1; | |
1177 | } | |
1178 | #endif | |
1179 | ||
9c0f2dac RS |
1180 | do |
1181 | { | |
1182 | hostent = gethostbyname (host); | |
1183 | try_count++; | |
1184 | if ((! hostent) && ((h_errno != TRY_AGAIN) || (try_count == 5))) | |
1185 | { | |
1186 | strcpy (pop_error, "Could not determine POP server's address"); | |
1187 | return (-1); | |
1188 | } | |
1189 | } while (! hostent); | |
1190 | ||
1191 | bzero ((char *) &addr, sizeof (addr)); | |
1192 | addr.sin_family = AF_INET; | |
1193 | ||
1194 | #ifdef KERBEROS | |
1195 | service = (flags & POP_NO_KERBEROS) ? POP_SERVICE : KPOP_SERVICE; | |
1196 | #else | |
1197 | service = POP_SERVICE; | |
1198 | #endif | |
1199 | ||
1200 | #ifdef HESIOD | |
1201 | if (! (flags & POP_NO_HESIOD)) | |
1202 | { | |
1203 | servent = hes_getservbyname (service, "tcp"); | |
1204 | if (servent) | |
1205 | { | |
1206 | addr.sin_port = servent->s_port; | |
1207 | found_port = 1; | |
1208 | } | |
1209 | } | |
1210 | #endif | |
1211 | if (! found_port) | |
1212 | { | |
1213 | servent = getservbyname (service, "tcp"); | |
1214 | if (servent) | |
1215 | { | |
1216 | addr.sin_port = servent->s_port; | |
1217 | } | |
1218 | else | |
1219 | { | |
1220 | #ifdef KERBEROS | |
1221 | addr.sin_port = htons ((flags & POP_NO_KERBEROS) ? | |
1222 | POP_PORT : KPOP_PORT); | |
1223 | #else | |
1224 | addr.sin_port = htons (POP_PORT); | |
1225 | #endif | |
1226 | } | |
1227 | } | |
1228 | ||
a27738b6 | 1229 | #define POP_SOCKET_ERROR "Could not create socket for POP connection: " |
9c0f2dac RS |
1230 | |
1231 | sock = socket (PF_INET, SOCK_STREAM, 0); | |
1232 | if (sock < 0) | |
1233 | { | |
a27738b6 | 1234 | strcpy (pop_error, POP_SOCKET_ERROR); |
9c0f2dac | 1235 | strncat (pop_error, strerror (errno), |
a27738b6 | 1236 | ERROR_MAX - sizeof (POP_SOCKET_ERROR)); |
9c0f2dac RS |
1237 | return (-1); |
1238 | ||
1239 | } | |
1240 | ||
1241 | while (*hostent->h_addr_list) | |
1242 | { | |
1243 | bcopy (*hostent->h_addr_list, (char *) &addr.sin_addr, | |
1244 | hostent->h_length); | |
1245 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) | |
1246 | break; | |
1247 | hostent->h_addr_list++; | |
1248 | } | |
1249 | ||
1250 | #define CONNECT_ERROR "Could not connect to POP server: " | |
1251 | ||
1252 | if (! *hostent->h_addr_list) | |
1253 | { | |
de5c39cf | 1254 | CLOSESOCKET (sock); |
9c0f2dac RS |
1255 | strcpy (pop_error, CONNECT_ERROR); |
1256 | strncat (pop_error, strerror (errno), | |
1257 | ERROR_MAX - sizeof (CONNECT_ERROR)); | |
1258 | return (-1); | |
1259 | ||
1260 | } | |
1261 | ||
1262 | #ifdef KERBEROS | |
1263 | #define KRB_ERROR "Kerberos error connecting to POP server: " | |
1264 | if (! (flags & POP_NO_KERBEROS)) | |
1265 | { | |
a27738b6 RS |
1266 | #ifdef KERBEROS5 |
1267 | if ((rem = krb5_init_context (&kcontext))) | |
9c0f2dac RS |
1268 | { |
1269 | krb5error: | |
a27738b6 RS |
1270 | if (auth_context) |
1271 | krb5_auth_con_free (kcontext, auth_context); | |
1272 | if (kcontext) | |
1273 | krb5_free_context (kcontext); | |
9c0f2dac RS |
1274 | strcpy (pop_error, KRB_ERROR); |
1275 | strncat (pop_error, error_message (rem), | |
1276 | ERROR_MAX - sizeof(KRB_ERROR)); | |
de5c39cf | 1277 | CLOSESOCKET (sock); |
9c0f2dac RS |
1278 | return (-1); |
1279 | } | |
1280 | ||
a27738b6 RS |
1281 | if ((rem = krb5_auth_con_init (kcontext, &auth_context))) |
1282 | goto krb5error; | |
1283 | ||
1284 | if (rem = krb5_cc_default (kcontext, &ccdef)) | |
1285 | goto krb5error; | |
1286 | ||
1287 | if (rem = krb5_cc_get_principal (kcontext, ccdef, &client)) | |
1288 | goto krb5error; | |
9c0f2dac RS |
1289 | |
1290 | for (cp = hostent->h_name; *cp; cp++) | |
1291 | { | |
1292 | if (isupper (*cp)) | |
1293 | { | |
1294 | *cp = tolower (*cp); | |
1295 | } | |
1296 | } | |
1297 | ||
a27738b6 RS |
1298 | if (rem = krb5_sname_to_principal (kcontext, hostent->h_name, |
1299 | POP_SERVICE, FALSE, &server)) | |
1300 | goto krb5error; | |
9c0f2dac | 1301 | |
a27738b6 RS |
1302 | rem = krb5_sendauth (kcontext, &auth_context, |
1303 | (krb5_pointer) &sock, "KPOPV1.0", client, server, | |
9c0f2dac RS |
1304 | AP_OPTS_MUTUAL_REQUIRED, |
1305 | 0, /* no checksum */ | |
1306 | 0, /* no creds, use ccache instead */ | |
1307 | ccdef, | |
9c0f2dac | 1308 | &err_ret, |
a27738b6 | 1309 | 0, /* don't need subsession key */ |
9c0f2dac | 1310 | 0); /* don't need reply */ |
a27738b6 | 1311 | krb5_free_principal (kcontext, server); |
9c0f2dac RS |
1312 | if (rem) |
1313 | { | |
1314 | if (err_ret && err_ret->text.length) | |
1315 | { | |
1316 | strcpy (pop_error, KRB_ERROR); | |
1317 | strncat (pop_error, error_message (rem), | |
1318 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1319 | strncat (pop_error, " [server says '", | |
1320 | ERROR_MAX - strlen (pop_error) - 1); | |
1321 | strncat (pop_error, err_ret->text.data, | |
1322 | min (ERROR_MAX - strlen (pop_error) - 1, | |
1323 | err_ret->text.length)); | |
1324 | strncat (pop_error, "']", | |
1325 | ERROR_MAX - strlen (pop_error) - 1); | |
1326 | } | |
1327 | else | |
1328 | { | |
1329 | strcpy (pop_error, KRB_ERROR); | |
1330 | strncat (pop_error, error_message (rem), | |
1331 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1332 | } | |
1333 | if (err_ret) | |
a27738b6 RS |
1334 | krb5_free_error (kcontext, err_ret); |
1335 | krb5_auth_con_free (kcontext, auth_context); | |
1336 | krb5_free_context (kcontext); | |
9c0f2dac | 1337 | |
de5c39cf | 1338 | CLOSESOCKET (sock); |
9c0f2dac RS |
1339 | return (-1); |
1340 | } | |
a27738b6 | 1341 | #else /* ! KERBEROS5 */ |
9c0f2dac | 1342 | ticket = (KTEXT) malloc (sizeof (KTEXT_ST)); |
51a66525 CH |
1343 | realhost = strdup (hostent->h_name); |
1344 | rem = krb_sendauth (0L, sock, ticket, "pop", realhost, | |
1345 | (char *) krb_realmofhost (realhost), | |
9c0f2dac RS |
1346 | (unsigned long) 0, &msg_data, &cred, schedule, |
1347 | (struct sockaddr_in *) 0, | |
1348 | (struct sockaddr_in *) 0, | |
1349 | "KPOPV0.1"); | |
1350 | free ((char *) ticket); | |
6a7eabe0 | 1351 | free (realhost); |
9c0f2dac RS |
1352 | if (rem != KSUCCESS) |
1353 | { | |
1354 | strcpy (pop_error, KRB_ERROR); | |
1355 | strncat (pop_error, krb_err_txt[rem], | |
1356 | ERROR_MAX - sizeof (KRB_ERROR)); | |
de5c39cf | 1357 | CLOSESOCKET (sock); |
9c0f2dac RS |
1358 | return (-1); |
1359 | } | |
a27738b6 | 1360 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1361 | } |
1362 | #endif /* KERBEROS */ | |
1363 | ||
1364 | return (sock); | |
1365 | } /* socket_connection */ | |
1366 | ||
1367 | /* | |
60b0a379 | 1368 | * Function: pop_getline |
9c0f2dac RS |
1369 | * |
1370 | * Purpose: Get a line of text from the connection and return a | |
1371 | * pointer to it. The carriage return and linefeed at the end of | |
1372 | * the line are stripped, but periods at the beginnings of lines | |
1373 | * are NOT dealt with in any special way. | |
1374 | * | |
1375 | * Arguments: | |
1376 | * server The server from which to get the line of text. | |
1377 | * | |
d89d0243 KH |
1378 | * Returns: The number of characters in the line, which is returned in |
1379 | * LINE, not including the final null. A return value of 0 | |
1380 | * indicates a blank line. A negative return value indicates an | |
1381 | * error (in which case the contents of LINE are undefined. In | |
1382 | * case of error, an error message is copied into pop_error. | |
9c0f2dac | 1383 | * |
60b0a379 | 1384 | * Notes: The line returned is overwritten with each call to pop_getline. |
9c0f2dac RS |
1385 | * |
1386 | * Side effects: Closes the connection on error. | |
d89d0243 KH |
1387 | * |
1388 | * THE RETURNED LINE MAY CONTAIN EMBEDDED NULLS! | |
9c0f2dac | 1389 | */ |
d89d0243 | 1390 | static int |
60b0a379 | 1391 | pop_getline (server, line) |
9c0f2dac | 1392 | popserver server; |
d89d0243 | 1393 | char **line; |
9c0f2dac RS |
1394 | { |
1395 | #define GETLINE_ERROR "Error reading from server: " | |
1396 | ||
1397 | int ret; | |
b6606ad8 RS |
1398 | int search_offset = 0; |
1399 | ||
9c0f2dac RS |
1400 | if (server->data) |
1401 | { | |
d89d0243 KH |
1402 | char *cp = find_crlf (server->buffer + server->buffer_index, |
1403 | server->data); | |
9c0f2dac RS |
1404 | if (cp) |
1405 | { | |
1406 | int found; | |
1407 | int data_used; | |
1408 | ||
1409 | found = server->buffer_index; | |
1410 | data_used = (cp + 2) - server->buffer - found; | |
1411 | ||
1412 | *cp = '\0'; /* terminate the string to be returned */ | |
1413 | server->data -= data_used; | |
1414 | server->buffer_index += data_used; | |
1415 | ||
1416 | if (pop_debug) | |
d89d0243 KH |
1417 | /* Embedded nulls will truncate this output prematurely, |
1418 | but that's OK because it's just for debugging anyway. */ | |
9c0f2dac | 1419 | fprintf (stderr, "<<< %s\n", server->buffer + found); |
d89d0243 KH |
1420 | *line = server->buffer + found; |
1421 | return (data_used - 2); | |
9c0f2dac RS |
1422 | } |
1423 | else | |
1424 | { | |
1425 | bcopy (server->buffer + server->buffer_index, | |
1426 | server->buffer, server->data); | |
b6606ad8 RS |
1427 | /* Record the fact that we've searched the data already in |
1428 | the buffer for a CRLF, so that when we search below, we | |
1429 | don't have to search the same data twice. There's a "- | |
1430 | 1" here to account for the fact that the last character | |
1431 | of the data we have may be the CR of a CRLF pair, of | |
1432 | which we haven't read the second half yet, so we may have | |
1433 | to search it again when we read more data. */ | |
1434 | search_offset = server->data - 1; | |
9c0f2dac RS |
1435 | server->buffer_index = 0; |
1436 | } | |
1437 | } | |
1438 | else | |
1439 | { | |
1440 | server->buffer_index = 0; | |
1441 | } | |
1442 | ||
1443 | while (1) | |
1444 | { | |
0ea95737 KH |
1445 | #ifdef GSSAPI |
1446 | /* | |
1447 | * We might be playing with a protected connection. If we are, then | |
1448 | * we need to first read a chunk of ciphertext from the server, | |
1449 | * unwrap it, and stuff it into the buffer. | |
1450 | */ | |
1451 | if (server->extra && | |
1452 | ((Gssapi (server->extra)->gss_flags) & GSSAPI_NEEDWRAP)) | |
9c0f2dac | 1453 | { |
0ea95737 KH |
1454 | char rcvbuf[GSSAPI_RCVBUF]; |
1455 | OM_uint32 major, minor, length; | |
1456 | gss_buffer_desc in_tok, out_tok; | |
1457 | struct _pop_gssapi *gss_data = Gssapi (server->extra); | |
1458 | ||
1459 | ret = fullread (server->file, (char *) &length, sizeof (length)); | |
1460 | ||
1461 | if (ret == sizeof (length)) | |
9c0f2dac | 1462 | { |
0ea95737 KH |
1463 | in_tok.length = ntohl (length); |
1464 | ||
1465 | if (in_tok.length <= GSSAPI_RCVBUF) | |
1466 | { | |
1467 | ret = fullread (server->file, rcvbuf, in_tok.length); | |
1468 | ||
1469 | if (ret == in_tok.length) | |
1470 | { | |
1471 | in_tok.value = (void *) rcvbuf; | |
1472 | ||
1473 | major = gss_unwrap (&minor, gss_data->gss_context, | |
1474 | &in_tok, &out_tok, 0, 0); | |
1475 | ||
1476 | if (major != GSS_S_COMPLETE) | |
1477 | { | |
1478 | pop_trash (server); | |
1479 | gen_gss_error ("unwrapping", major, minor); | |
1480 | return (-1); | |
1481 | } | |
1482 | ||
1483 | while (server->data + out_tok.length >= | |
1484 | server->buffer_size - 1) | |
1485 | server->buffer_size += GETLINE_INCR; | |
1486 | ||
1487 | server->buffer = (char *)realloc (server->buffer, | |
1488 | server->buffer_size); | |
1489 | ||
1490 | if (! server->buffer) | |
1491 | { | |
1492 | gss_release_buffer (&minor, &out_tok); | |
1493 | pop_trash (server); | |
1494 | strcpy (pop_error, "Out of memory in pop_getline"); | |
1495 | return (-1); | |
1496 | } | |
1497 | ||
1498 | bcopy (out_tok.value, server->buffer + server->data, | |
1499 | out_tok.length); | |
1500 | ||
1501 | ret = out_tok.length; | |
1502 | ||
1503 | gss_release_buffer (&minor, &out_tok); | |
1504 | } | |
1505 | else | |
1506 | ret = 0; /* force detection of unexpected EOF */ | |
1507 | } | |
1508 | else | |
1509 | { | |
1510 | pop_trash (server); | |
1511 | strcpy (pop_error, "Token from server too long in pop_getline"); | |
1512 | return (-1); | |
1513 | } | |
9c0f2dac | 1514 | } |
0ea95737 KH |
1515 | else |
1516 | ret = 0; /* force detection of unexpected EOF */ | |
9c0f2dac | 1517 | } |
0ea95737 KH |
1518 | else |
1519 | { | |
1520 | #endif /* GSSAPI */ | |
1521 | /* There's a "- 1" here to leave room for the null that we put | |
1522 | at the end of the read data below. We put the null there so | |
1523 | that find_crlf knows where to stop when we call it. */ | |
1524 | if (server->data == server->buffer_size - 1) | |
1525 | { | |
1526 | server->buffer_size += GETLINE_INCR; | |
1527 | server->buffer = (char *)realloc (server->buffer, | |
1528 | server->buffer_size); | |
1529 | if (! server->buffer) | |
1530 | { | |
1531 | strcpy (pop_error, "Out of memory in pop_getline"); | |
1532 | pop_trash (server); | |
1533 | return (-1); | |
1534 | } | |
1535 | } | |
1536 | ret = RECV (server->file, server->buffer + server->data, | |
1537 | server->buffer_size - server->data - 1, 0); | |
1538 | #ifdef GSSAPI | |
1539 | } | |
1540 | #endif /* GSSAPI */ | |
9c0f2dac RS |
1541 | if (ret < 0) |
1542 | { | |
1543 | strcpy (pop_error, GETLINE_ERROR); | |
1544 | strncat (pop_error, strerror (errno), | |
1545 | ERROR_MAX - sizeof (GETLINE_ERROR)); | |
1546 | pop_trash (server); | |
d89d0243 | 1547 | return (-1); |
9c0f2dac RS |
1548 | } |
1549 | else if (ret == 0) | |
1550 | { | |
60b0a379 | 1551 | strcpy (pop_error, "Unexpected EOF from server in pop_getline"); |
9c0f2dac | 1552 | pop_trash (server); |
d89d0243 | 1553 | return (-1); |
9c0f2dac RS |
1554 | } |
1555 | else | |
1556 | { | |
7a481e50 | 1557 | char *cp; |
9c0f2dac | 1558 | server->data += ret; |
7a481e50 | 1559 | server->buffer[server->data] = '\0'; |
9c0f2dac | 1560 | |
d89d0243 KH |
1561 | cp = find_crlf (server->buffer + search_offset, |
1562 | server->data - search_offset); | |
9c0f2dac RS |
1563 | if (cp) |
1564 | { | |
1565 | int data_used = (cp + 2) - server->buffer; | |
1566 | *cp = '\0'; | |
1567 | server->data -= data_used; | |
1568 | server->buffer_index = data_used; | |
1569 | ||
1570 | if (pop_debug) | |
1571 | fprintf (stderr, "<<< %s\n", server->buffer); | |
d89d0243 KH |
1572 | *line = server->buffer; |
1573 | return (data_used - 2); | |
9c0f2dac | 1574 | } |
a8f44d07 RS |
1575 | /* As above, the "- 1" here is to account for the fact that |
1576 | we may have read a CR without its accompanying LF. */ | |
1577 | search_offset += ret - 1; | |
9c0f2dac RS |
1578 | } |
1579 | } | |
1580 | ||
1581 | /* NOTREACHED */ | |
1582 | } | |
1583 | ||
0ea95737 KH |
1584 | #ifdef GSSAPI |
1585 | /* | |
1586 | * Function: fullread | |
1587 | * | |
1588 | * Purpose: Just like read, but keeps trying until the specified number | |
1589 | * number of bytes has been read into the buffer. This function is | |
1590 | * only needed if you are using the GSSAPI protection mechanisms. | |
1591 | * | |
1592 | * Return value: Same as read. Pop_error is not set. | |
1593 | */ | |
1594 | static int | |
1595 | fullread (fd, buf, nbytes) | |
1596 | int fd; | |
1597 | char *buf; | |
1598 | int nbytes; | |
1599 | { | |
1600 | char *cp; | |
1601 | int ret; | |
1602 | ||
1603 | cp = buf; | |
1604 | ||
1605 | while (nbytes > 0 && (ret = RECV (fd, cp, nbytes, 0)) > 0) | |
1606 | { | |
1607 | cp += ret; | |
1608 | nbytes -= ret; | |
1609 | } | |
1610 | ||
1611 | return (ret); | |
1612 | } | |
1613 | #endif /* GSSAPI */ | |
1614 | ||
9c0f2dac RS |
1615 | /* |
1616 | * Function: sendline | |
1617 | * | |
1618 | * Purpose: Sends a line of text to the POP server. The line of text | |
1619 | * passed into this function should NOT have the carriage return | |
1620 | * and linefeed on the end of it. Periods at beginnings of lines | |
1621 | * will NOT be treated specially by this function. | |
1622 | * | |
1623 | * Arguments: | |
1624 | * server The server to which to send the text. | |
1625 | * line The line of text to send. | |
1626 | * | |
1627 | * Return value: Upon successful completion, a value of 0 will be | |
1628 | * returned. Otherwise, a non-zero value will be returned, and | |
1629 | * an error will be copied into pop_error. | |
1630 | * | |
1631 | * Side effects: Closes the connection on error. | |
1632 | */ | |
1633 | static int | |
1634 | sendline (server, line) | |
1635 | popserver server; | |
1636 | char *line; | |
1637 | { | |
1638 | #define SENDLINE_ERROR "Error writing to POP server: " | |
1639 | int ret; | |
1640 | ||
0ea95737 KH |
1641 | #ifdef GSSAPI |
1642 | /* | |
1643 | * We might be playing with a protected connection. If we are, then we | |
1644 | * need to build our full plaintext, parse it into chunks small enough | |
1645 | * for the server to swallow, wrap each one, and send it over the net as | |
1646 | * specified by the RFC. | |
1647 | */ | |
1648 | if (server->extra && ((Gssapi (server->extra)->gss_flags) & GSSAPI_NEEDWRAP)) | |
1649 | { | |
1650 | char *sendbuf, *ptr; | |
1651 | OM_uint32 major, minor, length; | |
1652 | gss_buffer_desc in_tok, out_tok; | |
1653 | int len = 0, tot_len; | |
1654 | struct _pop_gssapi *gss_data = Gssapi (server->extra); | |
1655 | ||
1656 | sendbuf = malloc (strlen (line) + 3); | |
1657 | ||
1658 | if (! sendbuf) | |
1659 | { | |
1660 | pop_trash (server); | |
1661 | strcpy (pop_error, "Out of memory in sendline"); | |
1662 | return (-1); | |
1663 | } | |
1664 | ||
1665 | tot_len = sprintf (sendbuf, "%s\r\n", line); | |
1666 | ||
1667 | for (ptr = sendbuf; tot_len > 0; tot_len -= len, ptr += len) | |
1668 | { | |
1669 | len = ((tot_len > gss_data->max_size) ? | |
1670 | gss_data->max_size : tot_len); | |
1671 | ||
1672 | in_tok.value = (void *) ptr; | |
1673 | in_tok.length = len; | |
1674 | ||
1675 | major = gss_wrap (&minor, gss_data->gss_context, | |
1676 | (gss_data->gss_flags & GSSAPI_PRIVACY) ? 1 : 0, | |
1677 | GSS_C_QOP_DEFAULT, &in_tok, 0, &out_tok); | |
1678 | ||
1679 | if (major != GSS_S_COMPLETE) | |
1680 | { | |
1681 | free (sendbuf); | |
1682 | pop_trash (server); | |
1683 | gen_gss_error ("wrapping", major, minor); | |
1684 | return (-1); | |
1685 | } | |
1686 | ||
1687 | /* | |
1688 | * "Once the protection mechanism is in effect, the stream of | |
1689 | * command and response octets is processed into buffers of | |
1690 | * ciphertext. Each buffer is transferred over the connection | |
1691 | * as a stream of octets prepended with a four octet field in | |
1692 | * network byte order that represents the length of the | |
1693 | * following data." - RFC 1734, section 2 | |
1694 | */ | |
1695 | length = htonl (out_tok.length); | |
1696 | ret = fullwrite (server->file, (char *) &length, sizeof (length)); | |
1697 | if (ret == sizeof (length)) | |
1698 | { | |
1699 | ret = fullwrite (server->file, (char *) out_tok.value, | |
1700 | out_tok.length); | |
1701 | } | |
1702 | ||
1703 | gss_release_buffer (&minor, &out_tok); | |
1704 | ||
1705 | if (ret < 0) | |
1706 | break; | |
1707 | } | |
1708 | ||
1709 | free (sendbuf); | |
9c0f2dac | 1710 | } |
0ea95737 KH |
1711 | else |
1712 | { | |
1713 | #endif /* GSSAPI */ | |
1714 | ret = fullwrite (server->file, line, strlen (line)); | |
1715 | if (ret >= 0) | |
1716 | { /* 0 indicates that a blank line was written */ | |
1717 | ret = fullwrite (server->file, "\r\n", 2); | |
1718 | } | |
1719 | #ifdef GSSAPI | |
1720 | } | |
1721 | #endif /* GSSAPI */ | |
9c0f2dac RS |
1722 | |
1723 | if (ret < 0) | |
1724 | { | |
1725 | pop_trash (server); | |
1726 | strcpy (pop_error, SENDLINE_ERROR); | |
1727 | strncat (pop_error, strerror (errno), | |
1728 | ERROR_MAX - sizeof (SENDLINE_ERROR)); | |
1729 | return (ret); | |
1730 | } | |
1731 | ||
1732 | if (pop_debug) | |
1733 | fprintf (stderr, ">>> %s\n", line); | |
1734 | ||
1735 | return (0); | |
1736 | } | |
1737 | ||
1738 | /* | |
1739 | * Procedure: fullwrite | |
1740 | * | |
1741 | * Purpose: Just like write, but keeps trying until the entire string | |
1742 | * has been written. | |
1743 | * | |
1744 | * Return value: Same as write. Pop_error is not set. | |
1745 | */ | |
1746 | static int | |
1747 | fullwrite (fd, buf, nbytes) | |
1748 | int fd; | |
1749 | char *buf; | |
1750 | int nbytes; | |
1751 | { | |
1752 | char *cp; | |
9d3f4cee | 1753 | int ret = 0; |
9c0f2dac RS |
1754 | |
1755 | cp = buf; | |
9d3f4cee | 1756 | while (nbytes && ((ret = SEND (fd, cp, nbytes, 0)) > 0)) |
9c0f2dac RS |
1757 | { |
1758 | cp += ret; | |
1759 | nbytes -= ret; | |
1760 | } | |
1761 | ||
1762 | return (ret); | |
1763 | } | |
1764 | ||
1765 | /* | |
1766 | * Procedure getok | |
1767 | * | |
1768 | * Purpose: Reads a line from the server. If the return indicator is | |
1769 | * positive, return with a zero exit status. If not, return with | |
1770 | * a negative exit status. | |
1771 | * | |
1772 | * Arguments: | |
1773 | * server The server to read from. | |
1774 | * | |
1775 | * Returns: 0 for success, else for failure and puts error in pop_error. | |
1776 | * | |
8e6208c5 | 1777 | * Side effects: On failure, may make the connection unusable. |
9c0f2dac RS |
1778 | */ |
1779 | static int | |
1780 | getok (server) | |
1781 | popserver server; | |
1782 | { | |
1783 | char *fromline; | |
1784 | ||
60b0a379 | 1785 | if (pop_getline (server, &fromline) < 0) |
9c0f2dac RS |
1786 | { |
1787 | return (-1); | |
1788 | } | |
1789 | ||
1790 | if (! strncmp (fromline, "+OK", 3)) | |
1791 | return (0); | |
1792 | else if (! strncmp (fromline, "-ERR", 4)) | |
1793 | { | |
1794 | strncpy (pop_error, fromline, ERROR_MAX); | |
1795 | pop_error[ERROR_MAX-1] = '\0'; | |
1796 | return (-1); | |
1797 | } | |
1798 | else | |
1799 | { | |
1800 | strcpy (pop_error, | |
1801 | "Unexpected response from server; expecting +OK or -ERR"); | |
1802 | pop_trash (server); | |
1803 | return (-1); | |
1804 | } | |
1805 | } | |
1806 | ||
1807 | #if 0 | |
1808 | /* | |
1809 | * Function: gettermination | |
1810 | * | |
1811 | * Purpose: Gets the next line and verifies that it is a termination | |
1812 | * line (nothing but a dot). | |
1813 | * | |
1814 | * Return value: 0 on success, non-zero with pop_error set on error. | |
1815 | * | |
1816 | * Side effects: Closes the connection on error. | |
1817 | */ | |
1818 | static int | |
1819 | gettermination (server) | |
1820 | popserver server; | |
1821 | { | |
1822 | char *fromserver; | |
1823 | ||
60b0a379 | 1824 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
1825 | return (-1); |
1826 | ||
1827 | if (strcmp (fromserver, ".")) | |
1828 | { | |
1829 | strcpy (pop_error, | |
1830 | "Unexpected response from server in gettermination"); | |
1831 | pop_trash (server); | |
1832 | return (-1); | |
1833 | } | |
1834 | ||
1835 | return (0); | |
1836 | } | |
1837 | #endif | |
1838 | ||
1839 | /* | |
1840 | * Function pop_close | |
1841 | * | |
1842 | * Purpose: Close a pop connection, sending a "RSET" command to try to | |
1843 | * preserve any changes that were made and a "QUIT" command to | |
1844 | * try to get the server to quit, but ignoring any responses that | |
1845 | * are received. | |
1846 | * | |
8e6208c5 | 1847 | * Side effects: The server is unusable after this function returns. |
9c0f2dac RS |
1848 | * Changes made to the maildrop since the session was started (or |
1849 | * since the last pop_reset) may be lost. | |
1850 | */ | |
1851 | void | |
1852 | pop_close (server) | |
1853 | popserver server; | |
1854 | { | |
1855 | pop_trash (server); | |
1856 | free ((char *) server); | |
1857 | ||
1858 | return; | |
1859 | } | |
1860 | ||
1861 | /* | |
1862 | * Function: pop_trash | |
1863 | * | |
1864 | * Purpose: Like pop_close or pop_quit, but doesn't deallocate the | |
1865 | * memory associated with the server. It is legal to call | |
1866 | * pop_close or pop_quit after this function has been called. | |
1867 | */ | |
1868 | static void | |
1869 | pop_trash (server) | |
1870 | popserver server; | |
1871 | { | |
1872 | if (server->file >= 0) | |
1873 | { | |
c2668a61 RS |
1874 | /* avoid recursion; sendline can call pop_trash */ |
1875 | if (server->trash_started) | |
1876 | return; | |
1877 | server->trash_started = 1; | |
de5c39cf | 1878 | |
9c0f2dac RS |
1879 | sendline (server, "RSET"); |
1880 | sendline (server, "QUIT"); | |
1881 | ||
de5c39cf | 1882 | CLOSESOCKET (server->file); |
9c0f2dac RS |
1883 | server->file = -1; |
1884 | if (server->buffer) | |
1885 | { | |
1886 | free (server->buffer); | |
1887 | server->buffer = 0; | |
1888 | } | |
0ea95737 KH |
1889 | #ifdef GSSAPI |
1890 | if (server->extra) | |
1891 | { | |
1892 | OM_uint32 minor; | |
1893 | ||
1894 | if (Gssapi (server->extra)->gss_context != GSS_C_NO_CONTEXT) | |
1895 | gss_delete_sec_context (&minor, | |
1896 | &(Gssapi (server->extra)->gss_context), | |
1897 | GSS_C_NO_BUFFER); | |
1898 | free ((char *) server->extra); | |
1899 | server->extra = 0; | |
1900 | } | |
1901 | #endif /* GSSAPI */ | |
9c0f2dac | 1902 | } |
c2668a61 RS |
1903 | |
1904 | #ifdef WINDOWSNT | |
1905 | if (have_winsock) | |
1906 | WSACleanup (); | |
1907 | #endif | |
9c0f2dac RS |
1908 | } |
1909 | ||
0ea95737 KH |
1910 | #ifdef GSSAPI |
1911 | /* | |
1912 | * Function: pop_auth | |
1913 | * | |
1914 | * Purpose: To perform a GSSAPI authentication handshake with a POP server. | |
1915 | * If the negotiation is successful, it will return 0; otherwise, it | |
1916 | * will fill in pop_error with the error message and return either -1, | |
1917 | * indicating a potentially recoverable error, or -2, indicating an | |
1918 | * unrecoverable error. | |
1919 | * | |
1920 | * Side effects: The server may choose to close the connection if the | |
1921 | * handshake fails. The connection will be trashed if the error is | |
1922 | * unrecoverable. | |
1923 | */ | |
1924 | static int | |
1925 | pop_auth (server, username, host, flags) | |
1926 | popserver server; | |
1927 | char *username, *host; | |
1928 | int flags; | |
1929 | { | |
1930 | int gss_flags, ret; | |
1931 | char *fromserver; | |
1932 | OM_uint32 max_size, t_flags; | |
1933 | gss_ctx_id_t gss_context = GSS_C_NO_CONTEXT; | |
1934 | gss_buffer_desc in_tok, out_tok; | |
1935 | gss_name_t svc_name; | |
1936 | OM_uint32 major, minor, t_minor; | |
1937 | ||
1938 | /* calculate usable protection mechanisms */ | |
1939 | gss_flags = (GSSAPI_PROTECTION & | |
1940 | ~(((flags & POP_NO_NOPROT) ? GSSAPI_NOPROT : 0) | | |
1941 | ((flags & POP_NO_INTEG) ? GSSAPI_INTEGRITY : 0) | | |
1942 | ((flags & POP_NO_ENCRYPT) ? GSSAPI_PRIVACY : 0))); | |
1943 | ||
1944 | if (gss_flags == 0) | |
1945 | { | |
1946 | strcpy (pop_error, "Unable to provide selected protection level"); | |
1947 | return (-1); | |
1948 | } | |
1949 | ||
1950 | /* import service name of pop server */ | |
1951 | in_tok.value = (void *) malloc (strlen (host) + sizeof (GSSAPI_SERVICE) + 2); | |
1952 | ||
1953 | if (! in_tok.value) | |
1954 | { | |
1955 | strcpy (pop_error, "Out of memory in pop_auth"); | |
1956 | return (-1); | |
1957 | } | |
1958 | ||
1959 | sprintf ((char *) in_tok.value, "%s@%s", GSSAPI_SERVICE, host); | |
1960 | in_tok.length = strlen ((char *) in_tok.value); | |
1961 | ||
1962 | { | |
1963 | gss_OID_desc svc_name_oid = GSSAPI_SVC_TYPE; | |
1964 | ||
1965 | major = gss_import_name (&minor, &in_tok, &svc_name_oid, &svc_name); | |
1966 | } | |
1967 | ||
1968 | free ((char *) in_tok.value); | |
1969 | ||
1970 | if (major != GSS_S_COMPLETE) | |
1971 | { | |
1972 | gen_gss_error ("parsing name", major, minor); | |
1973 | return (-1); | |
1974 | } | |
1975 | ||
1976 | /* begin GSSAPI authentication handshake */ | |
1977 | if (sendline (server, "AUTH GSSAPI") || (pop_getline (server, &fromserver) < 0)) | |
1978 | { | |
1979 | gss_release_name (&t_minor, &svc_name); | |
1980 | return (-1); | |
1981 | } | |
1982 | ||
1983 | do | |
1984 | { | |
1985 | /* sanity-check server response */ | |
1986 | if (strncmp (fromserver, "+ ", 2)) | |
1987 | { | |
1988 | gss_release_name (&t_minor, &svc_name); | |
1989 | if (gss_context != GSS_C_NO_CONTEXT) | |
1990 | gss_delete_sec_context (&t_minor, &gss_context, GSS_C_NO_BUFFER); | |
1991 | if (0 == strncmp (fromserver, "-ERR", 4)) | |
1992 | { | |
1993 | strncpy (pop_error, fromserver, ERROR_MAX); | |
1994 | return (-1); | |
1995 | } | |
1996 | else | |
1997 | { | |
1998 | pop_trash (server); | |
1999 | strcpy (pop_error, | |
2000 | "Unexpected response from POP server in pop_auth"); | |
2001 | return (-2); | |
2002 | } | |
2003 | } | |
2004 | ||
2005 | if (strlen (fromserver) > 2) | |
2006 | { | |
2007 | /* base 64 decode the response... */ | |
2008 | ret = b64_decode (fromserver + 2, &in_tok); | |
2009 | if (ret != B64_SUCCESS) | |
2010 | { | |
2011 | gss_release_name (&t_minor, &svc_name); | |
2012 | if (gss_context != GSS_C_NO_CONTEXT) | |
2013 | gss_delete_sec_context (&t_minor, &gss_context, | |
2014 | GSS_C_NO_BUFFER); | |
2015 | sendline (server, "*"); | |
2016 | strcpy (pop_error, b64_error[ret]); | |
2017 | return (-1); | |
2018 | } | |
2019 | } | |
2020 | else | |
2021 | { | |
2022 | in_tok.length = 0; | |
2023 | in_tok.value = 0; | |
2024 | } | |
2025 | ||
2026 | /* call init_sec_context */ | |
2027 | major = gss_init_sec_context (&minor, GSS_C_NO_CREDENTIAL, &gss_context, | |
2028 | svc_name, GSS_C_NULL_OID, | |
2029 | GSS_C_MUTUAL_FLAG, 0, | |
2030 | GSS_C_NO_CHANNEL_BINDINGS, | |
2031 | in_tok.length ? & in_tok : GSS_C_NO_BUFFER, | |
2032 | 0, &out_tok, 0, 0); | |
2033 | ||
2034 | if (in_tok.length != 0) | |
2035 | free ((char *) in_tok.value); | |
2036 | ||
2037 | /* check for error */ | |
2038 | if (GSS_ERROR (major)) | |
2039 | { | |
2040 | gss_release_name (&t_minor, &svc_name); | |
2041 | if (gss_context != GSS_C_NO_CONTEXT) | |
2042 | gss_delete_sec_context (&t_minor, &gss_context, GSS_C_NO_BUFFER); | |
2043 | sendline (server, "*"); | |
2044 | gen_gss_error ("in init_sec_context", major, minor); | |
2045 | return (-1); | |
2046 | } | |
2047 | ||
2048 | if (out_tok.length != 0) | |
2049 | { | |
2050 | /* base 64 encode output token, if any */ | |
2051 | ret = b64_encode (&out_tok, &fromserver); | |
2052 | ||
2053 | gss_release_buffer (&t_minor, &out_tok); | |
2054 | ||
2055 | if (ret != B64_SUCCESS) | |
2056 | { | |
2057 | gss_release_name (&t_minor, &svc_name); | |
2058 | if (gss_context != GSS_C_NO_CONTEXT) | |
2059 | gss_delete_sec_context (&t_minor, &gss_context, | |
2060 | GSS_C_NO_BUFFER); | |
2061 | sendline (server, "*"); | |
2062 | strcpy (pop_error, b64_error[ret]); | |
2063 | return (-1); | |
2064 | } | |
2065 | ||
2066 | /* send output token... */ | |
2067 | ret = sendline (server, fromserver); | |
2068 | ||
2069 | free (fromserver); | |
2070 | } | |
2071 | else | |
2072 | /* empty output token... */ | |
2073 | ret = sendline (server, ""); | |
2074 | ||
2075 | /* get next token from server */ | |
2076 | if (ret || (pop_getline (server, &fromserver) < 0)) | |
2077 | { | |
2078 | gss_release_name (&t_minor, &svc_name); | |
2079 | if (gss_context != GSS_C_NO_CONTEXT) | |
2080 | gss_delete_sec_context (&t_minor, &gss_context, GSS_C_NO_BUFFER); | |
2081 | return (-1); | |
2082 | } | |
2083 | } while ((major & GSS_S_CONTINUE_NEEDED)); | |
2084 | ||
2085 | /* release name... */ | |
2086 | gss_release_name (&t_minor, &svc_name); | |
2087 | ||
2088 | /* get final response from server */ | |
2089 | if (strncmp (fromserver, "+ ", 2)) | |
2090 | { | |
2091 | gss_delete_sec_context (&t_minor, &gss_context, GSS_C_NO_BUFFER); | |
2092 | if (0 == strncmp (fromserver, "-ERR", 4)) | |
2093 | { | |
2094 | strncpy (pop_error, fromserver, ERROR_MAX); | |
2095 | return (-1); | |
2096 | } | |
2097 | else | |
2098 | { | |
2099 | pop_trash (server); | |
2100 | strcpy (pop_error, | |
2101 | "Unexpected response from POP server in pop_auth"); | |
2102 | return (-2); | |
2103 | } | |
2104 | } | |
2105 | ||
2106 | /* base 64 decode... */ | |
2107 | ret = b64_decode (fromserver + 2, &in_tok); | |
2108 | if (ret != B64_SUCCESS) | |
2109 | { | |
2110 | gss_delete_sec_context (&t_minor, &gss_context, GSS_C_NO_BUFFER); | |
2111 | sendline (server, "*"); | |
2112 | strcpy (pop_error, b64_error[ret]); | |
2113 | return (-1); | |
2114 | } | |
2115 | ||
2116 | /* unwrap... */ | |
2117 | major = gss_unwrap (&minor, gss_context, &in_tok, &out_tok, 0, 0); | |
2118 | ||
2119 | free ((char *) in_tok.value); | |
2120 | ||
2121 | if (major != GSS_S_COMPLETE || out_tok.length != sizeof (t_flags)) | |
2122 | { | |
2123 | if (out_tok.length != 0) | |
2124 | gss_release_buffer (&t_minor, &out_tok); | |
2125 | gss_delete_sec_context (&t_minor, &gss_context, GSS_C_NO_BUFFER); | |
2126 | sendline (server, "*"); | |
2127 | gen_gss_error ("in gss_unwrap", major, minor); | |
2128 | return (-1); | |
2129 | } | |
2130 | ||
2131 | /* get and check flags/size */ | |
2132 | bcopy ((void *) out_tok.value, (void *) &t_flags, sizeof (t_flags)); | |
2133 | ||
2134 | gss_release_buffer (&t_minor, &out_tok); | |
2135 | ||
2136 | max_size = ntohl (t_flags); | |
2137 | ||
2138 | t_flags = ((max_size & 0xFF000000) >> 24) & gss_flags; | |
2139 | max_size &= 0x00FFFFFF; | |
2140 | ||
2141 | if ((t_flags & GSSAPI_PRIVACY)) | |
2142 | gss_flags = GSSAPI_PRIVACY; | |
2143 | ||
2144 | else if ((t_flags & GSSAPI_INTEGRITY)) | |
2145 | gss_flags = GSSAPI_INTEGRITY; | |
2146 | ||
2147 | else if ((t_flags & GSSAPI_NOPROT)) | |
2148 | gss_flags = GSSAPI_NOPROT; | |
2149 | ||
2150 | else | |
2151 | { | |
2152 | gss_delete_sec_context (&t_minor, &gss_context, GSS_C_NO_BUFFER); | |
2153 | sendline (server, "*"); | |
2154 | strcpy (pop_error, "Server does not provide selected protection level"); | |
2155 | return (-1); | |
2156 | } | |
2157 | ||
2158 | if (max_size == 0) | |
2159 | { | |
2160 | gss_delete_sec_context (&t_minor, &gss_context, GSS_C_NO_BUFFER); | |
2161 | sendline (server, "*"); | |
2162 | strcpy (pop_error, "Bad server max length"); | |
2163 | return (-1); | |
2164 | } | |
2165 | ||
2166 | if ((gss_flags & GSSAPI_NEEDWRAP)) | |
2167 | { | |
2168 | major = gss_wrap_size_limit (&t_minor, gss_context, | |
2169 | (gss_flags & GSSAPI_PRIVACY) ? 1 : 0, | |
2170 | GSS_C_QOP_DEFAULT, | |
2171 | (max_size < GSSAPI_RCVBUF) ? max_size : | |
2172 | GSSAPI_RCVBUF, &max_size); | |
2173 | if (major != GSS_S_COMPLETE) | |
2174 | { | |
2175 | gss_delete_sec_context (&t_minor, &gss_context, GSS_C_NO_BUFFER); | |
2176 | sendline (server, "*"); | |
2177 | gen_gss_error ("getting max size", major, minor); | |
2178 | return (-1); | |
2179 | } | |
2180 | } | |
2181 | ||
2182 | /* generate return flags */ | |
2183 | { | |
2184 | OM_uint32 tmp; | |
2185 | ||
2186 | tmp = (((gss_flags << 24) & 0xFF000000) | (GSSAPI_RCVBUF & 0x00FFFFFF)); | |
2187 | t_flags = ntohl (tmp); | |
2188 | } | |
2189 | ||
2190 | in_tok.length = sizeof (t_flags) + strlen (username); | |
2191 | in_tok.value = (void *) malloc (in_tok.length); | |
2192 | ||
2193 | if (! in_tok.value) | |
2194 | { | |
2195 | gss_delete_sec_context (&t_minor, &gss_context, GSS_C_NO_BUFFER); | |
2196 | sendline (server, "*"); | |
2197 | strcpy (pop_error, "Out of memory in pop_auth"); | |
2198 | return (-1); | |
2199 | } | |
2200 | ||
2201 | bcopy ((void *) &t_flags, in_tok.value, sizeof (t_flags)); | |
2202 | bcopy ((void *) username, | |
2203 | (void *) (((char *) in_tok.value) + sizeof (t_flags)), | |
2204 | in_tok.length - sizeof (t_flags)); | |
2205 | ||
2206 | /* wrap result */ | |
2207 | major = gss_wrap (&minor, gss_context, 0, GSS_C_QOP_DEFAULT, | |
2208 | &in_tok, 0, &out_tok); | |
2209 | ||
2210 | free ((char *) in_tok.value); | |
2211 | ||
2212 | if (major != GSS_S_COMPLETE || out_tok.length == 0) | |
2213 | { | |
2214 | if (out_tok.length != 0) | |
2215 | gss_release_buffer (&t_minor, &out_tok); | |
2216 | gss_delete_sec_context (&t_minor, &gss_context, GSS_C_NO_BUFFER); | |
2217 | sendline (server, "*"); | |
2218 | gen_gss_error ("in gss_wrap", major, minor); | |
2219 | return (-1); | |
2220 | } | |
2221 | ||
2222 | /* base 64 encode... */ | |
2223 | ret = b64_encode (&out_tok, &fromserver); | |
2224 | ||
2225 | gss_release_buffer (&t_minor, &out_tok); | |
2226 | ||
2227 | if (ret != B64_SUCCESS) | |
2228 | { | |
2229 | gss_delete_sec_context (&t_minor, &gss_context, GSS_C_NO_BUFFER); | |
2230 | sendline (server, "*"); | |
2231 | strcpy (pop_error, b64_error[ret]); | |
2232 | return (-1); | |
2233 | } | |
2234 | ||
2235 | /* send to server */ | |
2236 | ret = sendline (server, fromserver); | |
2237 | ||
2238 | free (fromserver); | |
2239 | ||
2240 | /* see if the server likes me... */ | |
2241 | if (ret || getok (server)) | |
2242 | { | |
2243 | gss_delete_sec_context (&t_minor, &gss_context, GSS_C_NO_BUFFER); | |
2244 | return (-1); | |
2245 | } | |
2246 | ||
2247 | /* stash context */ | |
2248 | { | |
2249 | struct _pop_gssapi *gss_data; | |
2250 | ||
2251 | gss_data = (struct _pop_gssapi *) malloc (sizeof (struct _pop_gssapi)); | |
2252 | ||
2253 | if (! gss_data) | |
2254 | { | |
2255 | pop_trash (server); | |
2256 | gss_delete_sec_context (&t_minor, &gss_context, GSS_C_NO_BUFFER); | |
2257 | strcpy (pop_error, "Out of memory in pop_auth"); | |
2258 | return (-2); | |
2259 | } | |
2260 | ||
2261 | gss_data->gss_flags = gss_flags; | |
2262 | gss_data->max_size = max_size; | |
2263 | gss_data->gss_context = gss_context; | |
2264 | ||
2265 | server->extra = gss_data; | |
2266 | } | |
2267 | ||
2268 | return (0); | |
2269 | } | |
2270 | ||
2271 | /* | |
2272 | * Add as much error text to pop_error as will fit, but only put complete | |
2273 | * messages | |
2274 | */ | |
2275 | static void | |
2276 | gen_gss_error (msg, major, minor) | |
2277 | char *msg; | |
2278 | OM_uint32 major, minor; | |
2279 | { | |
2280 | char *p = pop_error, *t, *saved; | |
2281 | int max = ERROR_MAX - 1; /* for \0 */ | |
2282 | OM_uint32 t_minor, msg_ctx = 0; | |
2283 | gss_buffer_desc gss_msg; | |
2284 | ||
2285 | while (*msg && max) | |
2286 | { | |
2287 | *p++ = *msg++; | |
2288 | max--; | |
2289 | } | |
2290 | ||
2291 | if (max >= 2) | |
2292 | { | |
2293 | saved = p; | |
2294 | *p++ = ':'; | |
2295 | *p++ = ' '; | |
2296 | max -= 2; | |
2297 | } | |
2298 | else | |
2299 | { | |
2300 | *p = '\0'; | |
2301 | return; | |
2302 | } | |
2303 | ||
2304 | do | |
2305 | { | |
2306 | gss_display_status (&t_minor, major, GSS_C_GSS_CODE, GSS_C_NO_OID, | |
2307 | &msg_ctx, &gss_msg); | |
2308 | for (t = (char *) gss_msg.value; *t && max; max--) | |
2309 | { | |
2310 | *p++ = *t++; | |
2311 | } | |
2312 | gss_release_buffer (&t_minor, &gss_msg); | |
2313 | if (max == 0) | |
2314 | { | |
2315 | *saved = '\0'; | |
2316 | return; | |
2317 | } | |
2318 | } while (msg_ctx); | |
2319 | ||
2320 | saved = p; | |
2321 | ||
2322 | do | |
2323 | { | |
2324 | gss_display_status (&t_minor, minor, GSS_C_MECH_CODE, GSS_C_NO_OID, | |
2325 | &msg_ctx, &gss_msg); | |
2326 | for (t = (char *) gss_msg.value; *t && max; max--) | |
2327 | { | |
2328 | *p++ = *t++; | |
2329 | } | |
2330 | gss_release_buffer (&t_minor, &gss_msg); | |
2331 | if (max == 0) | |
2332 | { | |
2333 | *saved = '\0'; | |
2334 | return; | |
2335 | } | |
2336 | } while (msg_ctx); | |
2337 | ||
2338 | *p = '\0'; | |
2339 | return; | |
2340 | } | |
2341 | ||
2342 | /* | |
2343 | * table-based base64 decoding function; takes 4 characters from in and | |
2344 | * writes from 1 to 3 bytes to out, storing the amount written in len | |
2345 | */ | |
2346 | static int | |
2347 | b64_d (in, out, len) | |
2348 | char *in, *out; | |
2349 | int *len; | |
2350 | { | |
2351 | int decodearray[] = | |
2352 | { | |
2353 | 0x3e, -1, -1, -1, 0x3f, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, | |
2354 | 0x3b, 0x3c, 0x3d, -1, -1, -1, -1, -1, -1, -1, 0x00, 0x01, | |
2355 | 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, | |
2356 | 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, | |
2357 | -1, -1, -1, -1, -1, -1, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, | |
2358 | 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, | |
2359 | 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33 | |
2360 | }; | |
2361 | ||
2362 | int d; | |
2363 | ||
2364 | if (!in || !out || !len) | |
2365 | return (B64_BADPARAM); | |
2366 | ||
2367 | if (*in < '+' || *in > 'z') | |
2368 | return (B64_BADCHAR); | |
2369 | ||
2370 | d = decodearray[*(in++) - '+']; | |
2371 | if (d == -1) | |
2372 | return (B64_BADCHAR); | |
2373 | *out = d << 2; | |
2374 | ||
2375 | if (*in < '+' || *in > 'z') | |
2376 | return (B64_BADCHAR); | |
2377 | ||
2378 | d = decodearray[*(in++) - '+']; | |
2379 | if (d == -1) | |
2380 | return (B64_BADCHAR); | |
2381 | *(out++) |= d >> 4; | |
2382 | *out = (d & 15) << 4; | |
2383 | ||
2384 | if (*in < '+' || *in > 'z') | |
2385 | return (B64_BADCHAR); | |
2386 | else if (*in == '=') | |
2387 | if (*(in + 1) != '=') | |
2388 | return (B64_BADPAD); | |
2389 | else | |
2390 | { | |
2391 | *len = 1; | |
2392 | return (B64_SUCCESS); | |
2393 | } | |
2394 | ||
2395 | d = decodearray[*(in++) - '+']; | |
2396 | if (d == -1) | |
2397 | return (B64_BADCHAR); | |
2398 | *(out++) |= d >> 2; | |
2399 | *out = (d & 3) << 6; | |
2400 | ||
2401 | if (*in < '+' || *in > 'z') | |
2402 | return (B64_BADCHAR); | |
2403 | else if (*in == '=') | |
2404 | { | |
2405 | *len = 2; | |
2406 | return (B64_SUCCESS); | |
2407 | } | |
2408 | ||
2409 | d = decodearray[*in - '+']; | |
2410 | if (d == -1) | |
2411 | return (B64_BADCHAR); | |
2412 | *out |= d; | |
2413 | ||
2414 | *len = 3; | |
2415 | return (B64_SUCCESS); | |
2416 | } | |
2417 | ||
2418 | /* | |
2419 | * simple base64 encoding function that takes from 0 to 3 bytes and | |
2420 | * outputs 4 encoded characters, with appropriate padding | |
2421 | */ | |
2422 | static int | |
2423 | b64_e (in, out, len) | |
2424 | unsigned char *in, *out; | |
2425 | int len; | |
2426 | { | |
2427 | unsigned char codearray[] = | |
2428 | "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; | |
2429 | ||
2430 | if (!in || !out || len <= 0 || len > 3) | |
2431 | return (B64_BADPARAM); | |
2432 | ||
2433 | *(out++) = codearray[((*in) >> 2)]; | |
2434 | ||
2435 | if (--len == 0) | |
2436 | { | |
2437 | *(out++) = codearray[(((*in) & 3) << 4)]; | |
2438 | *(out++) = '='; | |
2439 | *out = '='; | |
2440 | return (B64_SUCCESS); | |
2441 | } | |
2442 | ||
2443 | *(out++) = codearray[(((*in) & 3) << 4) | ((*(in + 1)) >> 4)]; | |
2444 | in++; | |
2445 | ||
2446 | if (--len == 0) | |
2447 | { | |
2448 | *(out++) = codearray[(((*in) & 15) << 2)]; | |
2449 | *out = '='; | |
2450 | return (B64_SUCCESS); | |
2451 | } | |
2452 | ||
2453 | *(out++) = codearray[(((*in) & 15) << 2) | ((*(in + 1)) >> 6)]; | |
2454 | *out = codearray[((*(in + 1)) & 63)]; | |
2455 | ||
2456 | return (B64_SUCCESS); | |
2457 | } | |
2458 | ||
2459 | /* | |
2460 | * given an input string, generate an output gss_buffer_t containing the | |
2461 | * decoded data and correct length; works by repeatedly driving b64_d () | |
2462 | * over the input string | |
2463 | */ | |
2464 | static int | |
2465 | b64_decode (enc, dec) | |
2466 | char *enc; | |
2467 | gss_buffer_t dec; | |
2468 | { | |
2469 | char *tmp; | |
2470 | int inlen, outlen = 0, t_len, ret; | |
2471 | ||
2472 | if (!enc || !dec) | |
2473 | return (B64_BADPARAM); | |
2474 | ||
2475 | dec->value = 0; | |
2476 | dec->length = 0; | |
2477 | ||
2478 | inlen = strlen (enc); | |
2479 | if ((inlen % 4)) | |
2480 | return (B64_BADLEN); | |
2481 | ||
2482 | dec->value = (void *) (tmp = (char *) malloc ((inlen / 4) * 3)); | |
2483 | ||
2484 | if (! tmp) | |
2485 | return (B64_NOMEM); | |
2486 | ||
2487 | for (; inlen; inlen -= 4) | |
2488 | { | |
2489 | ret = b64_d (enc, tmp, &t_len); | |
2490 | if (ret != B64_SUCCESS) | |
2491 | { | |
2492 | free ((char *) dec->value); | |
2493 | dec->value = 0; | |
2494 | return (ret); | |
2495 | } | |
2496 | else if (t_len != 3) | |
2497 | { | |
2498 | dec->length = outlen + t_len; | |
2499 | return (B64_SUCCESS); | |
2500 | } | |
2501 | else | |
2502 | { | |
2503 | enc += 4; | |
2504 | tmp += t_len; | |
2505 | outlen += t_len; | |
2506 | } | |
2507 | } | |
2508 | ||
2509 | dec->length = outlen; | |
2510 | return (B64_SUCCESS); | |
2511 | } | |
2512 | ||
2513 | /* | |
2514 | * given a gss_buffer_t, generate an encoded string containing the data. | |
2515 | * works by repeatedly driving b64_e () over the contents of the buffer_t | |
2516 | */ | |
2517 | static int | |
2518 | b64_encode (dec, enc) | |
2519 | gss_buffer_t dec; | |
2520 | char **enc; | |
2521 | { | |
2522 | unsigned char *tmp, *in; | |
2523 | int ret, len; | |
2524 | ||
2525 | if (!dec || !enc) | |
2526 | return (B64_BADPARAM); | |
2527 | ||
2528 | in = (unsigned char *) dec->value; | |
2529 | len = dec->length; | |
2530 | *enc = (char *) (tmp = (unsigned char *) malloc (((len * 4) / 3) + 5)); | |
2531 | ||
2532 | if (! tmp) | |
2533 | return (B64_NOMEM); | |
2534 | ||
2535 | do | |
2536 | { | |
2537 | ret = b64_e (in, tmp, len >= 3 ? 3 : len); | |
2538 | if (ret != B64_SUCCESS) | |
2539 | { | |
2540 | free (*enc); | |
2541 | *enc = 0; | |
2542 | return (ret); | |
2543 | } | |
2544 | else | |
2545 | { | |
2546 | in += 3; | |
2547 | tmp += 4; | |
2548 | } | |
2549 | } while ((len -= 3) > 0); | |
2550 | ||
2551 | *tmp = '\0'; | |
2552 | ||
2553 | return (B64_SUCCESS); | |
2554 | } | |
2555 | ||
2556 | #endif /* GSSAPI */ | |
2557 | ||
d89d0243 KH |
2558 | /* Return a pointer to the first CRLF in IN_STRING, which can contain |
2559 | embedded nulls and has LEN characters in it not including the final | |
2560 | null, or 0 if it does not contain one. */ | |
9c0f2dac RS |
2561 | |
2562 | static char * | |
d89d0243 | 2563 | find_crlf (in_string, len) |
8148baf9 | 2564 | char *in_string; |
d89d0243 | 2565 | int len; |
9c0f2dac | 2566 | { |
d89d0243 | 2567 | while (len--) |
9c0f2dac | 2568 | { |
d89d0243 | 2569 | if (*in_string == '\r') |
8148baf9 RS |
2570 | { |
2571 | if (*++in_string == '\n') | |
2572 | return (in_string - 1); | |
2573 | } | |
2574 | else | |
2575 | in_string++; | |
9c0f2dac | 2576 | } |
d89d0243 | 2577 | return (0); |
9c0f2dac RS |
2578 | } |
2579 | ||
2580 | #endif /* MAIL_USE_POP */ |