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mingw: wrap SSL_set_(w|r)fd to call _get_osfhandle
[git/dscho.git] / imap-send.c
blob69e614245681e86c56a50cd096a675e8dc96deec
1 /*
2 * git-imap-send - drops patches into an imap Drafts folder
3 * derived from isync/mbsync - mailbox synchronizer
4 *
5 * Copyright (C) 2000-2002 Michael R. Elkins <me@mutt.org>
6 * Copyright (C) 2002-2004 Oswald Buddenhagen <ossi@users.sf.net>
7 * Copyright (C) 2004 Theodore Y. Ts'o <tytso@mit.edu>
8 * Copyright (C) 2006 Mike McCormack
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 */
24
25 #include "cache.h"
26 #include "exec_cmd.h"
27 #include "run-command.h"
28 #ifdef NO_OPENSSL
29 typedef void *SSL;
30 #endif
31
32 struct store_conf {
33 char *name;
34 const char *path; /* should this be here? its interpretation is driver-specific */
35 char *map_inbox;
36 char *trash;
37 unsigned max_size; /* off_t is overkill */
38 unsigned trash_remote_new:1, trash_only_new:1;
39 };
40
41 struct string_list {
42 struct string_list *next;
43 char string[1];
44 };
45
46 struct channel_conf {
47 struct channel_conf *next;
48 char *name;
49 struct store_conf *master, *slave;
50 char *master_name, *slave_name;
51 char *sync_state;
52 struct string_list *patterns;
53 int mops, sops;
54 unsigned max_messages; /* for slave only */
55 };
56
57 struct group_conf {
58 struct group_conf *next;
59 char *name;
60 struct string_list *channels;
61 };
62
63 /* For message->status */
64 #define M_RECENT (1<<0) /* unsyncable flag; maildir_* depend on this being 1<<0 */
65 #define M_DEAD (1<<1) /* expunged */
66 #define M_FLAGS (1<<2) /* flags fetched */
67
68 struct message {
69 struct message *next;
70 /* struct string_list *keywords; */
71 size_t size; /* zero implies "not fetched" */
72 int uid;
73 unsigned char flags, status;
74 };
75
76 struct store {
77 struct store_conf *conf; /* foreign */
78
79 /* currently open mailbox */
80 const char *name; /* foreign! maybe preset? */
81 char *path; /* own */
82 struct message *msgs; /* own */
83 int uidvalidity;
84 unsigned char opts; /* maybe preset? */
85 /* note that the following do _not_ reflect stats from msgs, but mailbox totals */
86 int count; /* # of messages */
87 int recent; /* # of recent messages - don't trust this beyond the initial read */
88 };
89
90 struct msg_data {
91 char *data;
92 int len;
93 unsigned char flags;
94 unsigned int crlf:1;
95 };
96
97 #undef DRV_OK
98 #define DRV_OK 0
99 #define DRV_MSG_BAD -1
100 #define DRV_BOX_BAD -2
101 #define DRV_STORE_BAD -3
102
103 static int Verbose, Quiet;
104
105 static void imap_info(const char *, ...);
106 static void imap_warn(const char *, ...);
107
108 static char *next_arg(char **);
109
110 static void free_generic_messages(struct message *);
111
112 static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
113
114 static int nfvasprintf(char **strp, const char *fmt, va_list ap)
115 {
116 int len;
117 char tmp[8192];
118
119 len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
120 if (len < 0)
121 die("Fatal: Out of memory");
122 if (len >= sizeof(tmp))
123 die("imap command overflow!");
124 *strp = xmemdupz(tmp, len);
125 return len;
126 }
127
128 struct imap_server_conf {
129 char *name;
130 char *tunnel;
131 char *host;
132 int port;
133 char *user;
134 char *pass;
135 int use_ssl;
136 int ssl_verify;
137 int use_html;
138 };
139
140 struct imap_store_conf {
141 struct store_conf gen;
142 struct imap_server_conf *server;
143 unsigned use_namespace:1;
144 };
145
146 #define NIL (void *)0x1
147 #define LIST (void *)0x2
148
149 struct imap_list {
150 struct imap_list *next, *child;
151 char *val;
152 int len;
153 };
154
155 struct imap_socket {
156 int fd[2];
157 SSL *ssl;
158 };
159
160 struct imap_buffer {
161 struct imap_socket sock;
162 int bytes;
163 int offset;
164 char buf[1024];
165 };
166
167 struct imap_cmd;
168
169 struct imap {
170 int uidnext; /* from SELECT responses */
171 struct imap_list *ns_personal, *ns_other, *ns_shared; /* NAMESPACE info */
172 unsigned caps, rcaps; /* CAPABILITY results */
173 /* command queue */
174 int nexttag, num_in_progress, literal_pending;
175 struct imap_cmd *in_progress, **in_progress_append;
176 struct imap_buffer buf; /* this is BIG, so put it last */
177 };
178
179 struct imap_store {
180 struct store gen;
181 int uidvalidity;
182 struct imap *imap;
183 const char *prefix;
184 unsigned /*currentnc:1,*/ trashnc:1;
185 };
186
187 struct imap_cmd_cb {
188 int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
189 void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
190 void *ctx;
191 char *data;
192 int dlen;
193 int uid;
194 unsigned create:1, trycreate:1;
195 };
196
197 struct imap_cmd {
198 struct imap_cmd *next;
199 struct imap_cmd_cb cb;
200 char *cmd;
201 int tag;
202 };
203
204 #define CAP(cap) (imap->caps & (1 << (cap)))
205
206 enum CAPABILITY {
207 NOLOGIN = 0,
208 UIDPLUS,
209 LITERALPLUS,
210 NAMESPACE,
211 STARTTLS,
212 };
213
214 static const char *cap_list[] = {
215 "LOGINDISABLED",
216 "UIDPLUS",
217 "LITERAL+",
218 "NAMESPACE",
219 "STARTTLS",
220 };
221
222 #define RESP_OK 0
223 #define RESP_NO 1
224 #define RESP_BAD 2
225
226 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
227
228
229 static const char *Flags[] = {
230 "Draft",
231 "Flagged",
232 "Answered",
233 "Seen",
234 "Deleted",
235 };
236
237 #ifndef NO_OPENSSL
238 static void ssl_socket_perror(const char *func)
239 {
240 fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
241 }
242 #endif
243
244 static void socket_perror(const char *func, struct imap_socket *sock, int ret)
245 {
246 #ifndef NO_OPENSSL
247 if (sock->ssl) {
248 int sslerr = SSL_get_error(sock->ssl, ret);
249 switch (sslerr) {
250 case SSL_ERROR_NONE:
251 break;
252 case SSL_ERROR_SYSCALL:
253 perror("SSL_connect");
254 break;
255 default:
256 ssl_socket_perror("SSL_connect");
257 break;
258 }
259 } else
260 #endif
261 {
262 if (ret < 0)
263 perror(func);
264 else
265 fprintf(stderr, "%s: unexpected EOF\n", func);
266 }
267 }
268
269 static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
270 {
271 #ifdef NO_OPENSSL
272 fprintf(stderr, "SSL requested but SSL support not compiled in\n");
273 return -1;
274 #else
275 SSL_METHOD *meth;
276 SSL_CTX *ctx;
277 int ret;
278
279 SSL_library_init();
280 SSL_load_error_strings();
281
282 if (use_tls_only)
283 meth = TLSv1_method();
284 else
285 meth = SSLv23_method();
286
287 if (!meth) {
288 ssl_socket_perror("SSLv23_method");
289 return -1;
290 }
291
292 ctx = SSL_CTX_new(meth);
293
294 if (verify)
295 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
296
297 if (!SSL_CTX_set_default_verify_paths(ctx)) {
298 ssl_socket_perror("SSL_CTX_set_default_verify_paths");
299 return -1;
300 }
301 sock->ssl = SSL_new(ctx);
302 if (!sock->ssl) {
303 ssl_socket_perror("SSL_new");
304 return -1;
305 }
306 if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
307 ssl_socket_perror("SSL_set_rfd");
308 return -1;
309 }
310 if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
311 ssl_socket_perror("SSL_set_wfd");
312 return -1;
313 }
314
315 ret = SSL_connect(sock->ssl);
316 if (ret <= 0) {
317 socket_perror("SSL_connect", sock, ret);
318 return -1;
319 }
320
321 return 0;
322 #endif
323 }
324
325 static int socket_read(struct imap_socket *sock, char *buf, int len)
326 {
327 ssize_t n;
328 #ifndef NO_OPENSSL
329 if (sock->ssl)
330 n = SSL_read(sock->ssl, buf, len);
331 else
332 #endif
333 n = xread(sock->fd[0], buf, len);
334 if (n <= 0) {
335 socket_perror("read", sock, n);
336 close(sock->fd[0]);
337 close(sock->fd[1]);
338 sock->fd[0] = sock->fd[1] = -1;
339 }
340 return n;
341 }
342
343 static int socket_write(struct imap_socket *sock, const char *buf, int len)
344 {
345 int n;
346 #ifndef NO_OPENSSL
347 if (sock->ssl)
348 n = SSL_write(sock->ssl, buf, len);
349 else
350 #endif
351 n = write_in_full(sock->fd[1], buf, len);
352 if (n != len) {
353 socket_perror("write", sock, n);
354 close(sock->fd[0]);
355 close(sock->fd[1]);
356 sock->fd[0] = sock->fd[1] = -1;
357 }
358 return n;
359 }
360
361 static void socket_shutdown(struct imap_socket *sock)
362 {
363 #ifndef NO_OPENSSL
364 if (sock->ssl) {
365 SSL_shutdown(sock->ssl);
366 SSL_free(sock->ssl);
367 }
368 #endif
369 close(sock->fd[0]);
370 close(sock->fd[1]);
371 }
372
373 /* simple line buffering */
374 static int buffer_gets(struct imap_buffer *b, char **s)
375 {
376 int n;
377 int start = b->offset;
378
379 *s = b->buf + start;
380
381 for (;;) {
382 /* make sure we have enough data to read the \r\n sequence */
383 if (b->offset + 1 >= b->bytes) {
384 if (start) {
385 /* shift down used bytes */
386 *s = b->buf;
387
388 assert(start <= b->bytes);
389 n = b->bytes - start;
390
391 if (n)
392 memmove(b->buf, b->buf + start, n);
393 b->offset -= start;
394 b->bytes = n;
395 start = 0;
396 }
397
398 n = socket_read(&b->sock, b->buf + b->bytes,
399 sizeof(b->buf) - b->bytes);
400
401 if (n <= 0)
402 return -1;
403
404 b->bytes += n;
405 }
406
407 if (b->buf[b->offset] == '\r') {
408 assert(b->offset + 1 < b->bytes);
409 if (b->buf[b->offset + 1] == '\n') {
410 b->buf[b->offset] = 0; /* terminate the string */
411 b->offset += 2; /* next line */
412 if (Verbose)
413 puts(*s);
414 return 0;
415 }
416 }
417
418 b->offset++;
419 }
420 /* not reached */
421 }
422
423 static void imap_info(const char *msg, ...)
424 {
425 va_list va;
426
427 if (!Quiet) {
428 va_start(va, msg);
429 vprintf(msg, va);
430 va_end(va);
431 fflush(stdout);
432 }
433 }
434
435 static void imap_warn(const char *msg, ...)
436 {
437 va_list va;
438
439 if (Quiet < 2) {
440 va_start(va, msg);
441 vfprintf(stderr, msg, va);
442 va_end(va);
443 }
444 }
445
446 static char *next_arg(char **s)
447 {
448 char *ret;
449
450 if (!s || !*s)
451 return NULL;
452 while (isspace((unsigned char) **s))
453 (*s)++;
454 if (!**s) {
455 *s = NULL;
456 return NULL;
457 }
458 if (**s == '"') {
459 ++*s;
460 ret = *s;
461 *s = strchr(*s, '"');
462 } else {
463 ret = *s;
464 while (**s && !isspace((unsigned char) **s))
465 (*s)++;
466 }
467 if (*s) {
468 if (**s)
469 *(*s)++ = 0;
470 if (!**s)
471 *s = NULL;
472 }
473 return ret;
474 }
475
476 static void free_generic_messages(struct message *msgs)
477 {
478 struct message *tmsg;
479
480 for (; msgs; msgs = tmsg) {
481 tmsg = msgs->next;
482 free(msgs);
483 }
484 }
485
486 static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
487 {
488 int ret;
489 va_list va;
490
491 va_start(va, fmt);
492 if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
493 die("Fatal: buffer too small. Please report a bug.");
494 va_end(va);
495 return ret;
496 }
497
498 static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
499 struct imap_cmd_cb *cb,
500 const char *fmt, va_list ap)
501 {
502 struct imap *imap = ctx->imap;
503 struct imap_cmd *cmd;
504 int n, bufl;
505 char buf[1024];
506
507 cmd = xmalloc(sizeof(struct imap_cmd));
508 nfvasprintf(&cmd->cmd, fmt, ap);
509 cmd->tag = ++imap->nexttag;
510
511 if (cb)
512 cmd->cb = *cb;
513 else
514 memset(&cmd->cb, 0, sizeof(cmd->cb));
515
516 while (imap->literal_pending)
517 get_cmd_result(ctx, NULL);
518
519 bufl = nfsnprintf(buf, sizeof(buf), cmd->cb.data ? CAP(LITERALPLUS) ?
520 "%d %s{%d+}\r\n" : "%d %s{%d}\r\n" : "%d %s\r\n",
521 cmd->tag, cmd->cmd, cmd->cb.dlen);
522 if (Verbose) {
523 if (imap->num_in_progress)
524 printf("(%d in progress) ", imap->num_in_progress);
525 if (memcmp(cmd->cmd, "LOGIN", 5))
526 printf(">>> %s", buf);
527 else
528 printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
529 }
530 if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
531 free(cmd->cmd);
532 free(cmd);
533 if (cb)
534 free(cb->data);
535 return NULL;
536 }
537 if (cmd->cb.data) {
538 if (CAP(LITERALPLUS)) {
539 n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
540 free(cmd->cb.data);
541 if (n != cmd->cb.dlen ||
542 socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
543 free(cmd->cmd);
544 free(cmd);
545 return NULL;
546 }
547 cmd->cb.data = NULL;
548 } else
549 imap->literal_pending = 1;
550 } else if (cmd->cb.cont)
551 imap->literal_pending = 1;
552 cmd->next = NULL;
553 *imap->in_progress_append = cmd;
554 imap->in_progress_append = &cmd->next;
555 imap->num_in_progress++;
556 return cmd;
557 }
558
559 static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
560 struct imap_cmd_cb *cb,
561 const char *fmt, ...)
562 {
563 struct imap_cmd *ret;
564 va_list ap;
565
566 va_start(ap, fmt);
567 ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
568 va_end(ap);
569 return ret;
570 }
571
572 static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
573 const char *fmt, ...)
574 {
575 va_list ap;
576 struct imap_cmd *cmdp;
577
578 va_start(ap, fmt);
579 cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
580 va_end(ap);
581 if (!cmdp)
582 return RESP_BAD;
583
584 return get_cmd_result(ctx, cmdp);
585 }
586
587 static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
588 const char *fmt, ...)
589 {
590 va_list ap;
591 struct imap_cmd *cmdp;
592
593 va_start(ap, fmt);
594 cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
595 va_end(ap);
596 if (!cmdp)
597 return DRV_STORE_BAD;
598
599 switch (get_cmd_result(ctx, cmdp)) {
600 case RESP_BAD: return DRV_STORE_BAD;
601 case RESP_NO: return DRV_MSG_BAD;
602 default: return DRV_OK;
603 }
604 }
605
606 static int is_atom(struct imap_list *list)
607 {
608 return list && list->val && list->val != NIL && list->val != LIST;
609 }
610
611 static int is_list(struct imap_list *list)
612 {
613 return list && list->val == LIST;
614 }
615
616 static void free_list(struct imap_list *list)
617 {
618 struct imap_list *tmp;
619
620 for (; list; list = tmp) {
621 tmp = list->next;
622 if (is_list(list))
623 free_list(list->child);
624 else if (is_atom(list))
625 free(list->val);
626 free(list);
627 }
628 }
629
630 static int parse_imap_list_l(struct imap *imap, char **sp, struct imap_list **curp, int level)
631 {
632 struct imap_list *cur;
633 char *s = *sp, *p;
634 int n, bytes;
635
636 for (;;) {
637 while (isspace((unsigned char)*s))
638 s++;
639 if (level && *s == ')') {
640 s++;
641 break;
642 }
643 *curp = cur = xmalloc(sizeof(*cur));
644 curp = &cur->next;
645 cur->val = NULL; /* for clean bail */
646 if (*s == '(') {
647 /* sublist */
648 s++;
649 cur->val = LIST;
650 if (parse_imap_list_l(imap, &s, &cur->child, level + 1))
651 goto bail;
652 } else if (imap && *s == '{') {
653 /* literal */
654 bytes = cur->len = strtol(s + 1, &s, 10);
655 if (*s != '}')
656 goto bail;
657
658 s = cur->val = xmalloc(cur->len);
659
660 /* dump whats left over in the input buffer */
661 n = imap->buf.bytes - imap->buf.offset;
662
663 if (n > bytes)
664 /* the entire message fit in the buffer */
665 n = bytes;
666
667 memcpy(s, imap->buf.buf + imap->buf.offset, n);
668 s += n;
669 bytes -= n;
670
671 /* mark that we used part of the buffer */
672 imap->buf.offset += n;
673
674 /* now read the rest of the message */
675 while (bytes > 0) {
676 if ((n = socket_read(&imap->buf.sock, s, bytes)) <= 0)
677 goto bail;
678 s += n;
679 bytes -= n;
680 }
681
682 if (buffer_gets(&imap->buf, &s))
683 goto bail;
684 } else if (*s == '"') {
685 /* quoted string */
686 s++;
687 p = s;
688 for (; *s != '"'; s++)
689 if (!*s)
690 goto bail;
691 cur->len = s - p;
692 s++;
693 cur->val = xmemdupz(p, cur->len);
694 } else {
695 /* atom */
696 p = s;
697 for (; *s && !isspace((unsigned char)*s); s++)
698 if (level && *s == ')')
699 break;
700 cur->len = s - p;
701 if (cur->len == 3 && !memcmp("NIL", p, 3))
702 cur->val = NIL;
703 else
704 cur->val = xmemdupz(p, cur->len);
705 }
706
707 if (!level)
708 break;
709 if (!*s)
710 goto bail;
711 }
712 *sp = s;
713 *curp = NULL;
714 return 0;
715
716 bail:
717 *curp = NULL;
718 return -1;
719 }
720
721 static struct imap_list *parse_imap_list(struct imap *imap, char **sp)
722 {
723 struct imap_list *head;
724
725 if (!parse_imap_list_l(imap, sp, &head, 0))
726 return head;
727 free_list(head);
728 return NULL;
729 }
730
731 static struct imap_list *parse_list(char **sp)
732 {
733 return parse_imap_list(NULL, sp);
734 }
735
736 static void parse_capability(struct imap *imap, char *cmd)
737 {
738 char *arg;
739 unsigned i;
740
741 imap->caps = 0x80000000;
742 while ((arg = next_arg(&cmd)))
743 for (i = 0; i < ARRAY_SIZE(cap_list); i++)
744 if (!strcmp(cap_list[i], arg))
745 imap->caps |= 1 << i;
746 imap->rcaps = imap->caps;
747 }
748
749 static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
750 char *s)
751 {
752 struct imap *imap = ctx->imap;
753 char *arg, *p;
754
755 if (*s != '[')
756 return RESP_OK; /* no response code */
757 s++;
758 if (!(p = strchr(s, ']'))) {
759 fprintf(stderr, "IMAP error: malformed response code\n");
760 return RESP_BAD;
761 }
762 *p++ = 0;
763 arg = next_arg(&s);
764 if (!strcmp("UIDVALIDITY", arg)) {
765 if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg))) {
766 fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
767 return RESP_BAD;
768 }
769 } else if (!strcmp("UIDNEXT", arg)) {
770 if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
771 fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
772 return RESP_BAD;
773 }
774 } else if (!strcmp("CAPABILITY", arg)) {
775 parse_capability(imap, s);
776 } else if (!strcmp("ALERT", arg)) {
777 /* RFC2060 says that these messages MUST be displayed
778 * to the user
779 */
780 for (; isspace((unsigned char)*p); p++);
781 fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
782 } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
783 if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg)) ||
784 !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
785 fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
786 return RESP_BAD;
787 }
788 }
789 return RESP_OK;
790 }
791
792 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
793 {
794 struct imap *imap = ctx->imap;
795 struct imap_cmd *cmdp, **pcmdp, *ncmdp;
796 char *cmd, *arg, *arg1, *p;
797 int n, resp, resp2, tag;
798
799 for (;;) {
800 if (buffer_gets(&imap->buf, &cmd))
801 return RESP_BAD;
802
803 arg = next_arg(&cmd);
804 if (*arg == '*') {
805 arg = next_arg(&cmd);
806 if (!arg) {
807 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
808 return RESP_BAD;
809 }
810
811 if (!strcmp("NAMESPACE", arg)) {
812 imap->ns_personal = parse_list(&cmd);
813 imap->ns_other = parse_list(&cmd);
814 imap->ns_shared = parse_list(&cmd);
815 } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
816 !strcmp("NO", arg) || !strcmp("BYE", arg)) {
817 if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
818 return resp;
819 } else if (!strcmp("CAPABILITY", arg))
820 parse_capability(imap, cmd);
821 else if ((arg1 = next_arg(&cmd))) {
822 if (!strcmp("EXISTS", arg1))
823 ctx->gen.count = atoi(arg);
824 else if (!strcmp("RECENT", arg1))
825 ctx->gen.recent = atoi(arg);
826 } else {
827 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
828 return RESP_BAD;
829 }
830 } else if (!imap->in_progress) {
831 fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
832 return RESP_BAD;
833 } else if (*arg == '+') {
834 /* This can happen only with the last command underway, as
835 it enforces a round-trip. */
836 cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
837 offsetof(struct imap_cmd, next));
838 if (cmdp->cb.data) {
839 n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
840 free(cmdp->cb.data);
841 cmdp->cb.data = NULL;
842 if (n != (int)cmdp->cb.dlen)
843 return RESP_BAD;
844 } else if (cmdp->cb.cont) {
845 if (cmdp->cb.cont(ctx, cmdp, cmd))
846 return RESP_BAD;
847 } else {
848 fprintf(stderr, "IMAP error: unexpected command continuation request\n");
849 return RESP_BAD;
850 }
851 if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
852 return RESP_BAD;
853 if (!cmdp->cb.cont)
854 imap->literal_pending = 0;
855 if (!tcmd)
856 return DRV_OK;
857 } else {
858 tag = atoi(arg);
859 for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
860 if (cmdp->tag == tag)
861 goto gottag;
862 fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
863 return RESP_BAD;
864 gottag:
865 if (!(*pcmdp = cmdp->next))
866 imap->in_progress_append = pcmdp;
867 imap->num_in_progress--;
868 if (cmdp->cb.cont || cmdp->cb.data)
869 imap->literal_pending = 0;
870 arg = next_arg(&cmd);
871 if (!strcmp("OK", arg))
872 resp = DRV_OK;
873 else {
874 if (!strcmp("NO", arg)) {
875 if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
876 p = strchr(cmdp->cmd, '"');
877 if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", strchr(p + 1, '"') - p + 1, p)) {
878 resp = RESP_BAD;
879 goto normal;
880 }
881 /* not waiting here violates the spec, but a server that does not
882 grok this nonetheless violates it too. */
883 cmdp->cb.create = 0;
884 if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
885 resp = RESP_BAD;
886 goto normal;
887 }
888 free(cmdp->cmd);
889 free(cmdp);
890 if (!tcmd)
891 return 0; /* ignored */
892 if (cmdp == tcmd)
893 tcmd = ncmdp;
894 continue;
895 }
896 resp = RESP_NO;
897 } else /*if (!strcmp("BAD", arg))*/
898 resp = RESP_BAD;
899 fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
900 memcmp(cmdp->cmd, "LOGIN", 5) ?
901 cmdp->cmd : "LOGIN <user> <pass>",
902 arg, cmd ? cmd : "");
903 }
904 if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
905 resp = resp2;
906 normal:
907 if (cmdp->cb.done)
908 cmdp->cb.done(ctx, cmdp, resp);
909 free(cmdp->cb.data);
910 free(cmdp->cmd);
911 free(cmdp);
912 if (!tcmd || tcmd == cmdp)
913 return resp;
914 }
915 }
916 /* not reached */
917 }
918
919 static void imap_close_server(struct imap_store *ictx)
920 {
921 struct imap *imap = ictx->imap;
922
923 if (imap->buf.sock.fd[0] != -1) {
924 imap_exec(ictx, NULL, "LOGOUT");
925 socket_shutdown(&imap->buf.sock);
926 }
927 free_list(imap->ns_personal);
928 free_list(imap->ns_other);
929 free_list(imap->ns_shared);
930 free(imap);
931 }
932
933 static void imap_close_store(struct store *ctx)
934 {
935 imap_close_server((struct imap_store *)ctx);
936 free_generic_messages(ctx->msgs);
937 free(ctx);
938 }
939
940 static struct store *imap_open_store(struct imap_server_conf *srvc)
941 {
942 struct imap_store *ctx;
943 struct imap *imap;
944 char *arg, *rsp;
945 int s = -1, preauth;
946
947 ctx = xcalloc(sizeof(*ctx), 1);
948
949 ctx->imap = imap = xcalloc(sizeof(*imap), 1);
950 imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
951 imap->in_progress_append = &imap->in_progress;
952
953 /* open connection to IMAP server */
954
955 if (srvc->tunnel) {
956 const char *argv[4];
957 struct child_process tunnel = {0};
958
959 imap_info("Starting tunnel '%s'... ", srvc->tunnel);
960
961 argv[0] = "sh";
962 argv[1] = "-c";
963 argv[2] = srvc->tunnel;
964 argv[3] = NULL;
965
966 tunnel.argv = argv;
967 tunnel.in = -1;
968 tunnel.out = -1;
969 if (start_command(&tunnel))
970 die("cannot start proxy %s", argv[0]);
971
972 imap->buf.sock.fd[0] = tunnel.out;
973 imap->buf.sock.fd[1] = tunnel.in;
974
975 imap_info("ok\n");
976 } else {
977 #ifndef NO_IPV6
978 struct addrinfo hints, *ai0, *ai;
979 int gai;
980 char portstr[6];
981
982 snprintf(portstr, sizeof(portstr), "%hu", srvc->port);
983
984 memset(&hints, 0, sizeof(hints));
985 hints.ai_socktype = SOCK_STREAM;
986 hints.ai_protocol = IPPROTO_TCP;
987
988 imap_info("Resolving %s... ", srvc->host);
989 gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
990 if (gai) {
991 fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
992 goto bail;
993 }
994 imap_info("ok\n");
995
996 for (ai0 = ai; ai; ai = ai->ai_next) {
997 char addr[NI_MAXHOST];
998
999 s = socket(ai->ai_family, ai->ai_socktype,
1000 ai->ai_protocol);
1001 if (s < 0)
1002 continue;
1003
1004 getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1005 sizeof(addr), NULL, 0, NI_NUMERICHOST);
1006 imap_info("Connecting to [%s]:%s... ", addr, portstr);
1007
1008 if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1009 close(s);
1010 s = -1;
1011 perror("connect");
1012 continue;
1013 }
1014
1015 break;
1016 }
1017 freeaddrinfo(ai0);
1018 #else /* NO_IPV6 */
1019 struct hostent *he;
1020 struct sockaddr_in addr;
1021
1022 memset(&addr, 0, sizeof(addr));
1023 addr.sin_port = htons(srvc->port);
1024 addr.sin_family = AF_INET;
1025
1026 imap_info("Resolving %s... ", srvc->host);
1027 he = gethostbyname(srvc->host);
1028 if (!he) {
1029 perror("gethostbyname");
1030 goto bail;
1031 }
1032 imap_info("ok\n");
1033
1034 addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1035
1036 s = socket(PF_INET, SOCK_STREAM, 0);
1037
1038 imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1039 if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1040 close(s);
1041 s = -1;
1042 perror("connect");
1043 }
1044 #endif
1045 if (s < 0) {
1046 fputs("Error: unable to connect to server.\n", stderr);
1047 goto bail;
1048 }
1049
1050 imap->buf.sock.fd[0] = s;
1051 imap->buf.sock.fd[1] = dup(s);
1052
1053 if (srvc->use_ssl &&
1054 ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1055 close(s);
1056 goto bail;
1057 }
1058 imap_info("ok\n");
1059 }
1060
1061 /* read the greeting string */
1062 if (buffer_gets(&imap->buf, &rsp)) {
1063 fprintf(stderr, "IMAP error: no greeting response\n");
1064 goto bail;
1065 }
1066 arg = next_arg(&rsp);
1067 if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1068 fprintf(stderr, "IMAP error: invalid greeting response\n");
1069 goto bail;
1070 }
1071 preauth = 0;
1072 if (!strcmp("PREAUTH", arg))
1073 preauth = 1;
1074 else if (strcmp("OK", arg) != 0) {
1075 fprintf(stderr, "IMAP error: unknown greeting response\n");
1076 goto bail;
1077 }
1078 parse_response_code(ctx, NULL, rsp);
1079 if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1080 goto bail;
1081
1082 if (!preauth) {
1083 #ifndef NO_OPENSSL
1084 if (!srvc->use_ssl && CAP(STARTTLS)) {
1085 if (imap_exec(ctx, 0, "STARTTLS") != RESP_OK)
1086 goto bail;
1087 if (ssl_socket_connect(&imap->buf.sock, 1,
1088 srvc->ssl_verify))
1089 goto bail;
1090 /* capabilities may have changed, so get the new capabilities */
1091 if (imap_exec(ctx, 0, "CAPABILITY") != RESP_OK)
1092 goto bail;
1093 }
1094 #endif
1095 imap_info("Logging in...\n");
1096 if (!srvc->user) {
1097 fprintf(stderr, "Skipping server %s, no user\n", srvc->host);
1098 goto bail;
1099 }
1100 if (!srvc->pass) {
1101 char prompt[80];
1102 sprintf(prompt, "Password (%s@%s): ", srvc->user, srvc->host);
1103 arg = getpass(prompt);
1104 if (!arg) {
1105 perror("getpass");
1106 exit(1);
1107 }
1108 if (!*arg) {
1109 fprintf(stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host);
1110 goto bail;
1111 }
1112 /*
1113 * getpass() returns a pointer to a static buffer. make a copy
1114 * for long term storage.
1115 */
1116 srvc->pass = xstrdup(arg);
1117 }
1118 if (CAP(NOLOGIN)) {
1119 fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1120 goto bail;
1121 }
1122 if (!imap->buf.sock.ssl)
1123 imap_warn("*** IMAP Warning *** Password is being "
1124 "sent in the clear\n");
1125 if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1126 fprintf(stderr, "IMAP error: LOGIN failed\n");
1127 goto bail;
1128 }
1129 } /* !preauth */
1130
1131 ctx->prefix = "";
1132 ctx->trashnc = 1;
1133 return (struct store *)ctx;
1134
1135 bail:
1136 imap_close_store(&ctx->gen);
1137 return NULL;
1138 }
1139
1140 static int imap_make_flags(int flags, char *buf)
1141 {
1142 const char *s;
1143 unsigned i, d;
1144
1145 for (i = d = 0; i < ARRAY_SIZE(Flags); i++)
1146 if (flags & (1 << i)) {
1147 buf[d++] = ' ';
1148 buf[d++] = '\\';
1149 for (s = Flags[i]; *s; s++)
1150 buf[d++] = *s;
1151 }
1152 buf[0] = '(';
1153 buf[d++] = ')';
1154 return d;
1155 }
1156
1157 static int imap_store_msg(struct store *gctx, struct msg_data *data)
1158 {
1159 struct imap_store *ctx = (struct imap_store *)gctx;
1160 struct imap *imap = ctx->imap;
1161 struct imap_cmd_cb cb;
1162 const char *prefix, *box;
1163 int ret, d;
1164 char flagstr[128];
1165
1166 memset(&cb, 0, sizeof(cb));
1167
1168 cb.dlen = data->len;
1169 cb.data = xmalloc(cb.dlen);
1170 memcpy(cb.data, data->data, data->len);
1171
1172 d = 0;
1173 if (data->flags) {
1174 d = imap_make_flags(data->flags, flagstr);
1175 flagstr[d++] = ' ';
1176 }
1177 flagstr[d] = 0;
1178
1179 box = gctx->name;
1180 prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1181 cb.create = 0;
1182 ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" %s", prefix, box, flagstr);
1183 imap->caps = imap->rcaps;
1184 if (ret != DRV_OK)
1185 return ret;
1186 gctx->count++;
1187
1188 return DRV_OK;
1189 }
1190
1191 static void encode_html_chars(struct strbuf *p)
1192 {
1193 int i;
1194 for (i = 0; i < p->len; i++) {
1195 if (p->buf[i] == '&')
1196 strbuf_splice(p, i, 1, "&amp;", 5);
1197 if (p->buf[i] == '<')
1198 strbuf_splice(p, i, 1, "&lt;", 4);
1199 if (p->buf[i] == '>')
1200 strbuf_splice(p, i, 1, "&gt;", 4);
1201 if (p->buf[i] == '"')
1202 strbuf_splice(p, i, 1, "&quot;", 6);
1203 }
1204 }
1205 static void wrap_in_html(struct msg_data *msg)
1206 {
1207 struct strbuf buf = STRBUF_INIT;
1208 struct strbuf **lines;
1209 struct strbuf **p;
1210 static char *content_type = "Content-Type: text/html;\n";
1211 static char *pre_open = "<pre>\n";
1212 static char *pre_close = "</pre>\n";
1213 int added_header = 0;
1214
1215 strbuf_attach(&buf, msg->data, msg->len, msg->len);
1216 lines = strbuf_split(&buf, '\n');
1217 strbuf_release(&buf);
1218 for (p = lines; *p; p++) {
1219 if (! added_header) {
1220 if ((*p)->len == 1 && *((*p)->buf) == '\n') {
1221 strbuf_addstr(&buf, content_type);
1222 strbuf_addbuf(&buf, *p);
1223 strbuf_addstr(&buf, pre_open);
1224 added_header = 1;
1225 continue;
1226 }
1227 }
1228 else
1229 encode_html_chars(*p);
1230 strbuf_addbuf(&buf, *p);
1231 }
1232 strbuf_addstr(&buf, pre_close);
1233 strbuf_list_free(lines);
1234 msg->len = buf.len;
1235 msg->data = strbuf_detach(&buf, NULL);
1236 }
1237
1238 #define CHUNKSIZE 0x1000
1239
1240 static int read_message(FILE *f, struct msg_data *msg)
1241 {
1242 struct strbuf buf = STRBUF_INIT;
1243
1244 memset(msg, 0, sizeof(*msg));
1245
1246 do {
1247 if (strbuf_fread(&buf, CHUNKSIZE, f) <= 0)
1248 break;
1249 } while (!feof(f));
1250
1251 msg->len = buf.len;
1252 msg->data = strbuf_detach(&buf, NULL);
1253 return msg->len;
1254 }
1255
1256 static int count_messages(struct msg_data *msg)
1257 {
1258 int count = 0;
1259 char *p = msg->data;
1260
1261 while (1) {
1262 if (!prefixcmp(p, "From ")) {
1263 count++;
1264 p += 5;
1265 }
1266 p = strstr(p+5, "\nFrom ");
1267 if (!p)
1268 break;
1269 p++;
1270 }
1271 return count;
1272 }
1273
1274 static int split_msg(struct msg_data *all_msgs, struct msg_data *msg, int *ofs)
1275 {
1276 char *p, *data;
1277
1278 memset(msg, 0, sizeof *msg);
1279 if (*ofs >= all_msgs->len)
1280 return 0;
1281
1282 data = &all_msgs->data[*ofs];
1283 msg->len = all_msgs->len - *ofs;
1284
1285 if (msg->len < 5 || prefixcmp(data, "From "))
1286 return 0;
1287
1288 p = strchr(data, '\n');
1289 if (p) {
1290 p = &p[1];
1291 msg->len -= p-data;
1292 *ofs += p-data;
1293 data = p;
1294 }
1295
1296 p = strstr(data, "\nFrom ");
1297 if (p)
1298 msg->len = &p[1] - data;
1299
1300 msg->data = xmemdupz(data, msg->len);
1301 *ofs += msg->len;
1302 return 1;
1303 }
1304
1305 static struct imap_server_conf server = {
1306 NULL, /* name */
1307 NULL, /* tunnel */
1308 NULL, /* host */
1309 0, /* port */
1310 NULL, /* user */
1311 NULL, /* pass */
1312 0, /* use_ssl */
1313 1, /* ssl_verify */
1314 0, /* use_html */
1315 };
1316
1317 static char *imap_folder;
1318
1319 static int git_imap_config(const char *key, const char *val, void *cb)
1320 {
1321 char imap_key[] = "imap.";
1322
1323 if (strncmp(key, imap_key, sizeof imap_key - 1))
1324 return 0;
1325
1326 if (!val)
1327 return config_error_nonbool(key);
1328
1329 key += sizeof imap_key - 1;
1330
1331 if (!strcmp("folder", key)) {
1332 imap_folder = xstrdup(val);
1333 } else if (!strcmp("host", key)) {
1334 if (!prefixcmp(val, "imap:"))
1335 val += 5;
1336 else if (!prefixcmp(val, "imaps:")) {
1337 val += 6;
1338 server.use_ssl = 1;
1339 }
1340 if (!prefixcmp(val, "//"))
1341 val += 2;
1342 server.host = xstrdup(val);
1343 } else if (!strcmp("user", key))
1344 server.user = xstrdup(val);
1345 else if (!strcmp("pass", key))
1346 server.pass = xstrdup(val);
1347 else if (!strcmp("port", key))
1348 server.port = git_config_int(key, val);
1349 else if (!strcmp("tunnel", key))
1350 server.tunnel = xstrdup(val);
1351 else if (!strcmp("sslverify", key))
1352 server.ssl_verify = git_config_bool(key, val);
1353 else if (!strcmp("preformattedHTML", key))
1354 server.use_html = git_config_bool(key, val);
1355 return 0;
1356 }
1357
1358 int main(int argc, char **argv)
1359 {
1360 struct msg_data all_msgs, msg;
1361 struct store *ctx = NULL;
1362 int ofs = 0;
1363 int r;
1364 int total, n = 0;
1365 int nongit_ok;
1366
1367 git_extract_argv0_path(argv[0]);
1368
1369 setup_git_directory_gently(&nongit_ok);
1370 git_config(git_imap_config, NULL);
1371
1372 if (!server.port)
1373 server.port = server.use_ssl ? 993 : 143;
1374
1375 if (!imap_folder) {
1376 fprintf(stderr, "no imap store specified\n");
1377 return 1;
1378 }
1379 if (!server.host) {
1380 if (!server.tunnel) {
1381 fprintf(stderr, "no imap host specified\n");
1382 return 1;
1383 }
1384 server.host = "tunnel";
1385 }
1386
1387 /* read the messages */
1388 if (!read_message(stdin, &all_msgs)) {
1389 fprintf(stderr, "nothing to send\n");
1390 return 1;
1391 }
1392
1393 total = count_messages(&all_msgs);
1394 if (!total) {
1395 fprintf(stderr, "no messages to send\n");
1396 return 1;
1397 }
1398
1399 /* write it to the imap server */
1400 ctx = imap_open_store(&server);
1401 if (!ctx) {
1402 fprintf(stderr, "failed to open store\n");
1403 return 1;
1404 }
1405
1406 fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1407 ctx->name = imap_folder;
1408 while (1) {
1409 unsigned percent = n * 100 / total;
1410 fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1411 if (!split_msg(&all_msgs, &msg, &ofs))
1412 break;
1413 if (server.use_html)
1414 wrap_in_html(&msg);
1415 r = imap_store_msg(ctx, &msg);
1416 if (r != DRV_OK)
1417 break;
1418 n++;
1419 }
1420 fprintf(stderr, "\n");
1421
1422 imap_close_store(ctx);
1423
1424 return 0;
1425 }
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