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Windows: fix utime() for read-only files
[git/dscho.git] / imap-send.c
blob5631930bc3462c5d85d29e7e840f1cf24cd7111b
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 };
95
96 static const char imap_send_usage[] = "git imap-send < <mbox>";
97
98 #undef DRV_OK
99 #define DRV_OK 0
100 #define DRV_MSG_BAD -1
101 #define DRV_BOX_BAD -2
102 #define DRV_STORE_BAD -3
103
104 static int Verbose, Quiet;
105
106 __attribute__((format (printf, 1, 2)))
107 static void imap_info(const char *, ...);
108 __attribute__((format (printf, 1, 2)))
109 static void imap_warn(const char *, ...);
110
111 static char *next_arg(char **);
112
113 static void free_generic_messages(struct message *);
114
115 __attribute__((format (printf, 3, 4)))
116 static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
117
118 static int nfvasprintf(char **strp, const char *fmt, va_list ap)
119 {
120 int len;
121 char tmp[8192];
122
123 len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
124 if (len < 0)
125 die("Fatal: Out of memory");
126 if (len >= sizeof(tmp))
127 die("imap command overflow!");
128 *strp = xmemdupz(tmp, len);
129 return len;
130 }
131
132 struct imap_server_conf {
133 char *name;
134 char *tunnel;
135 char *host;
136 int port;
137 char *user;
138 char *pass;
139 int use_ssl;
140 int ssl_verify;
141 int use_html;
142 };
143
144 struct imap_store_conf {
145 struct store_conf gen;
146 struct imap_server_conf *server;
147 unsigned use_namespace:1;
148 };
149
150 #define NIL (void *)0x1
151 #define LIST (void *)0x2
152
153 struct imap_list {
154 struct imap_list *next, *child;
155 char *val;
156 int len;
157 };
158
159 struct imap_socket {
160 int fd[2];
161 SSL *ssl;
162 };
163
164 struct imap_buffer {
165 struct imap_socket sock;
166 int bytes;
167 int offset;
168 char buf[1024];
169 };
170
171 struct imap_cmd;
172
173 struct imap {
174 int uidnext; /* from SELECT responses */
175 struct imap_list *ns_personal, *ns_other, *ns_shared; /* NAMESPACE info */
176 unsigned caps, rcaps; /* CAPABILITY results */
177 /* command queue */
178 int nexttag, num_in_progress, literal_pending;
179 struct imap_cmd *in_progress, **in_progress_append;
180 struct imap_buffer buf; /* this is BIG, so put it last */
181 };
182
183 struct imap_store {
184 struct store gen;
185 int uidvalidity;
186 struct imap *imap;
187 const char *prefix;
188 unsigned /*currentnc:1,*/ trashnc:1;
189 };
190
191 struct imap_cmd_cb {
192 int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
193 void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
194 void *ctx;
195 char *data;
196 int dlen;
197 int uid;
198 unsigned create:1, trycreate:1;
199 };
200
201 struct imap_cmd {
202 struct imap_cmd *next;
203 struct imap_cmd_cb cb;
204 char *cmd;
205 int tag;
206 };
207
208 #define CAP(cap) (imap->caps & (1 << (cap)))
209
210 enum CAPABILITY {
211 NOLOGIN = 0,
212 UIDPLUS,
213 LITERALPLUS,
214 NAMESPACE,
215 STARTTLS,
216 };
217
218 static const char *cap_list[] = {
219 "LOGINDISABLED",
220 "UIDPLUS",
221 "LITERAL+",
222 "NAMESPACE",
223 "STARTTLS",
224 };
225
226 #define RESP_OK 0
227 #define RESP_NO 1
228 #define RESP_BAD 2
229
230 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
231
232
233 static const char *Flags[] = {
234 "Draft",
235 "Flagged",
236 "Answered",
237 "Seen",
238 "Deleted",
239 };
240
241 #ifndef NO_OPENSSL
242 static void ssl_socket_perror(const char *func)
243 {
244 fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
245 }
246 #endif
247
248 static void socket_perror(const char *func, struct imap_socket *sock, int ret)
249 {
250 #ifndef NO_OPENSSL
251 if (sock->ssl) {
252 int sslerr = SSL_get_error(sock->ssl, ret);
253 switch (sslerr) {
254 case SSL_ERROR_NONE:
255 break;
256 case SSL_ERROR_SYSCALL:
257 perror("SSL_connect");
258 break;
259 default:
260 ssl_socket_perror("SSL_connect");
261 break;
262 }
263 } else
264 #endif
265 {
266 if (ret < 0)
267 perror(func);
268 else
269 fprintf(stderr, "%s: unexpected EOF\n", func);
270 }
271 }
272
273 static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
274 {
275 #ifdef NO_OPENSSL
276 fprintf(stderr, "SSL requested but SSL support not compiled in\n");
277 return -1;
278 #else
279 #if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
280 const SSL_METHOD *meth;
281 #else
282 SSL_METHOD *meth;
283 #endif
284 SSL_CTX *ctx;
285 int ret;
286
287 SSL_library_init();
288 SSL_load_error_strings();
289
290 if (use_tls_only)
291 meth = TLSv1_method();
292 else
293 meth = SSLv23_method();
294
295 if (!meth) {
296 ssl_socket_perror("SSLv23_method");
297 return -1;
298 }
299
300 ctx = SSL_CTX_new(meth);
301
302 if (verify)
303 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
304
305 if (!SSL_CTX_set_default_verify_paths(ctx)) {
306 ssl_socket_perror("SSL_CTX_set_default_verify_paths");
307 return -1;
308 }
309 sock->ssl = SSL_new(ctx);
310 if (!sock->ssl) {
311 ssl_socket_perror("SSL_new");
312 return -1;
313 }
314 if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
315 ssl_socket_perror("SSL_set_rfd");
316 return -1;
317 }
318 if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
319 ssl_socket_perror("SSL_set_wfd");
320 return -1;
321 }
322
323 ret = SSL_connect(sock->ssl);
324 if (ret <= 0) {
325 socket_perror("SSL_connect", sock, ret);
326 return -1;
327 }
328
329 return 0;
330 #endif
331 }
332
333 static int socket_read(struct imap_socket *sock, char *buf, int len)
334 {
335 ssize_t n;
336 #ifndef NO_OPENSSL
337 if (sock->ssl)
338 n = SSL_read(sock->ssl, buf, len);
339 else
340 #endif
341 n = xread(sock->fd[0], buf, len);
342 if (n <= 0) {
343 socket_perror("read", sock, n);
344 close(sock->fd[0]);
345 close(sock->fd[1]);
346 sock->fd[0] = sock->fd[1] = -1;
347 }
348 return n;
349 }
350
351 static int socket_write(struct imap_socket *sock, const char *buf, int len)
352 {
353 int n;
354 #ifndef NO_OPENSSL
355 if (sock->ssl)
356 n = SSL_write(sock->ssl, buf, len);
357 else
358 #endif
359 n = write_in_full(sock->fd[1], buf, len);
360 if (n != len) {
361 socket_perror("write", sock, n);
362 close(sock->fd[0]);
363 close(sock->fd[1]);
364 sock->fd[0] = sock->fd[1] = -1;
365 }
366 return n;
367 }
368
369 static void socket_shutdown(struct imap_socket *sock)
370 {
371 #ifndef NO_OPENSSL
372 if (sock->ssl) {
373 SSL_shutdown(sock->ssl);
374 SSL_free(sock->ssl);
375 }
376 #endif
377 close(sock->fd[0]);
378 close(sock->fd[1]);
379 }
380
381 /* simple line buffering */
382 static int buffer_gets(struct imap_buffer *b, char **s)
383 {
384 int n;
385 int start = b->offset;
386
387 *s = b->buf + start;
388
389 for (;;) {
390 /* make sure we have enough data to read the \r\n sequence */
391 if (b->offset + 1 >= b->bytes) {
392 if (start) {
393 /* shift down used bytes */
394 *s = b->buf;
395
396 assert(start <= b->bytes);
397 n = b->bytes - start;
398
399 if (n)
400 memmove(b->buf, b->buf + start, n);
401 b->offset -= start;
402 b->bytes = n;
403 start = 0;
404 }
405
406 n = socket_read(&b->sock, b->buf + b->bytes,
407 sizeof(b->buf) - b->bytes);
408
409 if (n <= 0)
410 return -1;
411
412 b->bytes += n;
413 }
414
415 if (b->buf[b->offset] == '\r') {
416 assert(b->offset + 1 < b->bytes);
417 if (b->buf[b->offset + 1] == '\n') {
418 b->buf[b->offset] = 0; /* terminate the string */
419 b->offset += 2; /* next line */
420 if (Verbose)
421 puts(*s);
422 return 0;
423 }
424 }
425
426 b->offset++;
427 }
428 /* not reached */
429 }
430
431 static void imap_info(const char *msg, ...)
432 {
433 va_list va;
434
435 if (!Quiet) {
436 va_start(va, msg);
437 vprintf(msg, va);
438 va_end(va);
439 fflush(stdout);
440 }
441 }
442
443 static void imap_warn(const char *msg, ...)
444 {
445 va_list va;
446
447 if (Quiet < 2) {
448 va_start(va, msg);
449 vfprintf(stderr, msg, va);
450 va_end(va);
451 }
452 }
453
454 static char *next_arg(char **s)
455 {
456 char *ret;
457
458 if (!s || !*s)
459 return NULL;
460 while (isspace((unsigned char) **s))
461 (*s)++;
462 if (!**s) {
463 *s = NULL;
464 return NULL;
465 }
466 if (**s == '"') {
467 ++*s;
468 ret = *s;
469 *s = strchr(*s, '"');
470 } else {
471 ret = *s;
472 while (**s && !isspace((unsigned char) **s))
473 (*s)++;
474 }
475 if (*s) {
476 if (**s)
477 *(*s)++ = 0;
478 if (!**s)
479 *s = NULL;
480 }
481 return ret;
482 }
483
484 static void free_generic_messages(struct message *msgs)
485 {
486 struct message *tmsg;
487
488 for (; msgs; msgs = tmsg) {
489 tmsg = msgs->next;
490 free(msgs);
491 }
492 }
493
494 static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
495 {
496 int ret;
497 va_list va;
498
499 va_start(va, fmt);
500 if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
501 die("Fatal: buffer too small. Please report a bug.");
502 va_end(va);
503 return ret;
504 }
505
506 static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
507 struct imap_cmd_cb *cb,
508 const char *fmt, va_list ap)
509 {
510 struct imap *imap = ctx->imap;
511 struct imap_cmd *cmd;
512 int n, bufl;
513 char buf[1024];
514
515 cmd = xmalloc(sizeof(struct imap_cmd));
516 nfvasprintf(&cmd->cmd, fmt, ap);
517 cmd->tag = ++imap->nexttag;
518
519 if (cb)
520 cmd->cb = *cb;
521 else
522 memset(&cmd->cb, 0, sizeof(cmd->cb));
523
524 while (imap->literal_pending)
525 get_cmd_result(ctx, NULL);
526
527 bufl = nfsnprintf(buf, sizeof(buf), cmd->cb.data ? CAP(LITERALPLUS) ?
528 "%d %s{%d+}\r\n" : "%d %s{%d}\r\n" : "%d %s\r\n",
529 cmd->tag, cmd->cmd, cmd->cb.dlen);
530 if (Verbose) {
531 if (imap->num_in_progress)
532 printf("(%d in progress) ", imap->num_in_progress);
533 if (memcmp(cmd->cmd, "LOGIN", 5))
534 printf(">>> %s", buf);
535 else
536 printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
537 }
538 if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
539 free(cmd->cmd);
540 free(cmd);
541 if (cb)
542 free(cb->data);
543 return NULL;
544 }
545 if (cmd->cb.data) {
546 if (CAP(LITERALPLUS)) {
547 n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
548 free(cmd->cb.data);
549 if (n != cmd->cb.dlen ||
550 socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
551 free(cmd->cmd);
552 free(cmd);
553 return NULL;
554 }
555 cmd->cb.data = NULL;
556 } else
557 imap->literal_pending = 1;
558 } else if (cmd->cb.cont)
559 imap->literal_pending = 1;
560 cmd->next = NULL;
561 *imap->in_progress_append = cmd;
562 imap->in_progress_append = &cmd->next;
563 imap->num_in_progress++;
564 return cmd;
565 }
566
567 __attribute__((format (printf, 3, 4)))
568 static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
569 struct imap_cmd_cb *cb,
570 const char *fmt, ...)
571 {
572 struct imap_cmd *ret;
573 va_list ap;
574
575 va_start(ap, fmt);
576 ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
577 va_end(ap);
578 return ret;
579 }
580
581 __attribute__((format (printf, 3, 4)))
582 static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
583 const char *fmt, ...)
584 {
585 va_list ap;
586 struct imap_cmd *cmdp;
587
588 va_start(ap, fmt);
589 cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
590 va_end(ap);
591 if (!cmdp)
592 return RESP_BAD;
593
594 return get_cmd_result(ctx, cmdp);
595 }
596
597 __attribute__((format (printf, 3, 4)))
598 static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
599 const char *fmt, ...)
600 {
601 va_list ap;
602 struct imap_cmd *cmdp;
603
604 va_start(ap, fmt);
605 cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
606 va_end(ap);
607 if (!cmdp)
608 return DRV_STORE_BAD;
609
610 switch (get_cmd_result(ctx, cmdp)) {
611 case RESP_BAD: return DRV_STORE_BAD;
612 case RESP_NO: return DRV_MSG_BAD;
613 default: return DRV_OK;
614 }
615 }
616
617 static int is_atom(struct imap_list *list)
618 {
619 return list && list->val && list->val != NIL && list->val != LIST;
620 }
621
622 static int is_list(struct imap_list *list)
623 {
624 return list && list->val == LIST;
625 }
626
627 static void free_list(struct imap_list *list)
628 {
629 struct imap_list *tmp;
630
631 for (; list; list = tmp) {
632 tmp = list->next;
633 if (is_list(list))
634 free_list(list->child);
635 else if (is_atom(list))
636 free(list->val);
637 free(list);
638 }
639 }
640
641 static int parse_imap_list_l(struct imap *imap, char **sp, struct imap_list **curp, int level)
642 {
643 struct imap_list *cur;
644 char *s = *sp, *p;
645 int n, bytes;
646
647 for (;;) {
648 while (isspace((unsigned char)*s))
649 s++;
650 if (level && *s == ')') {
651 s++;
652 break;
653 }
654 *curp = cur = xmalloc(sizeof(*cur));
655 curp = &cur->next;
656 cur->val = NULL; /* for clean bail */
657 if (*s == '(') {
658 /* sublist */
659 s++;
660 cur->val = LIST;
661 if (parse_imap_list_l(imap, &s, &cur->child, level + 1))
662 goto bail;
663 } else if (imap && *s == '{') {
664 /* literal */
665 bytes = cur->len = strtol(s + 1, &s, 10);
666 if (*s != '}')
667 goto bail;
668
669 s = cur->val = xmalloc(cur->len);
670
671 /* dump whats left over in the input buffer */
672 n = imap->buf.bytes - imap->buf.offset;
673
674 if (n > bytes)
675 /* the entire message fit in the buffer */
676 n = bytes;
677
678 memcpy(s, imap->buf.buf + imap->buf.offset, n);
679 s += n;
680 bytes -= n;
681
682 /* mark that we used part of the buffer */
683 imap->buf.offset += n;
684
685 /* now read the rest of the message */
686 while (bytes > 0) {
687 if ((n = socket_read(&imap->buf.sock, s, bytes)) <= 0)
688 goto bail;
689 s += n;
690 bytes -= n;
691 }
692
693 if (buffer_gets(&imap->buf, &s))
694 goto bail;
695 } else if (*s == '"') {
696 /* quoted string */
697 s++;
698 p = s;
699 for (; *s != '"'; s++)
700 if (!*s)
701 goto bail;
702 cur->len = s - p;
703 s++;
704 cur->val = xmemdupz(p, cur->len);
705 } else {
706 /* atom */
707 p = s;
708 for (; *s && !isspace((unsigned char)*s); s++)
709 if (level && *s == ')')
710 break;
711 cur->len = s - p;
712 if (cur->len == 3 && !memcmp("NIL", p, 3))
713 cur->val = NIL;
714 else
715 cur->val = xmemdupz(p, cur->len);
716 }
717
718 if (!level)
719 break;
720 if (!*s)
721 goto bail;
722 }
723 *sp = s;
724 *curp = NULL;
725 return 0;
726
727 bail:
728 *curp = NULL;
729 return -1;
730 }
731
732 static struct imap_list *parse_imap_list(struct imap *imap, char **sp)
733 {
734 struct imap_list *head;
735
736 if (!parse_imap_list_l(imap, sp, &head, 0))
737 return head;
738 free_list(head);
739 return NULL;
740 }
741
742 static struct imap_list *parse_list(char **sp)
743 {
744 return parse_imap_list(NULL, sp);
745 }
746
747 static void parse_capability(struct imap *imap, char *cmd)
748 {
749 char *arg;
750 unsigned i;
751
752 imap->caps = 0x80000000;
753 while ((arg = next_arg(&cmd)))
754 for (i = 0; i < ARRAY_SIZE(cap_list); i++)
755 if (!strcmp(cap_list[i], arg))
756 imap->caps |= 1 << i;
757 imap->rcaps = imap->caps;
758 }
759
760 static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
761 char *s)
762 {
763 struct imap *imap = ctx->imap;
764 char *arg, *p;
765
766 if (*s != '[')
767 return RESP_OK; /* no response code */
768 s++;
769 if (!(p = strchr(s, ']'))) {
770 fprintf(stderr, "IMAP error: malformed response code\n");
771 return RESP_BAD;
772 }
773 *p++ = 0;
774 arg = next_arg(&s);
775 if (!strcmp("UIDVALIDITY", arg)) {
776 if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg))) {
777 fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
778 return RESP_BAD;
779 }
780 } else if (!strcmp("UIDNEXT", arg)) {
781 if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
782 fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
783 return RESP_BAD;
784 }
785 } else if (!strcmp("CAPABILITY", arg)) {
786 parse_capability(imap, s);
787 } else if (!strcmp("ALERT", arg)) {
788 /* RFC2060 says that these messages MUST be displayed
789 * to the user
790 */
791 for (; isspace((unsigned char)*p); p++);
792 fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
793 } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
794 if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg)) ||
795 !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
796 fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
797 return RESP_BAD;
798 }
799 }
800 return RESP_OK;
801 }
802
803 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
804 {
805 struct imap *imap = ctx->imap;
806 struct imap_cmd *cmdp, **pcmdp, *ncmdp;
807 char *cmd, *arg, *arg1, *p;
808 int n, resp, resp2, tag;
809
810 for (;;) {
811 if (buffer_gets(&imap->buf, &cmd))
812 return RESP_BAD;
813
814 arg = next_arg(&cmd);
815 if (*arg == '*') {
816 arg = next_arg(&cmd);
817 if (!arg) {
818 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
819 return RESP_BAD;
820 }
821
822 if (!strcmp("NAMESPACE", arg)) {
823 imap->ns_personal = parse_list(&cmd);
824 imap->ns_other = parse_list(&cmd);
825 imap->ns_shared = parse_list(&cmd);
826 } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
827 !strcmp("NO", arg) || !strcmp("BYE", arg)) {
828 if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
829 return resp;
830 } else if (!strcmp("CAPABILITY", arg))
831 parse_capability(imap, cmd);
832 else if ((arg1 = next_arg(&cmd))) {
833 if (!strcmp("EXISTS", arg1))
834 ctx->gen.count = atoi(arg);
835 else if (!strcmp("RECENT", arg1))
836 ctx->gen.recent = atoi(arg);
837 } else {
838 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
839 return RESP_BAD;
840 }
841 } else if (!imap->in_progress) {
842 fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
843 return RESP_BAD;
844 } else if (*arg == '+') {
845 /* This can happen only with the last command underway, as
846 it enforces a round-trip. */
847 cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
848 offsetof(struct imap_cmd, next));
849 if (cmdp->cb.data) {
850 n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
851 free(cmdp->cb.data);
852 cmdp->cb.data = NULL;
853 if (n != (int)cmdp->cb.dlen)
854 return RESP_BAD;
855 } else if (cmdp->cb.cont) {
856 if (cmdp->cb.cont(ctx, cmdp, cmd))
857 return RESP_BAD;
858 } else {
859 fprintf(stderr, "IMAP error: unexpected command continuation request\n");
860 return RESP_BAD;
861 }
862 if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
863 return RESP_BAD;
864 if (!cmdp->cb.cont)
865 imap->literal_pending = 0;
866 if (!tcmd)
867 return DRV_OK;
868 } else {
869 tag = atoi(arg);
870 for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
871 if (cmdp->tag == tag)
872 goto gottag;
873 fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
874 return RESP_BAD;
875 gottag:
876 if (!(*pcmdp = cmdp->next))
877 imap->in_progress_append = pcmdp;
878 imap->num_in_progress--;
879 if (cmdp->cb.cont || cmdp->cb.data)
880 imap->literal_pending = 0;
881 arg = next_arg(&cmd);
882 if (!strcmp("OK", arg))
883 resp = DRV_OK;
884 else {
885 if (!strcmp("NO", arg)) {
886 if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
887 p = strchr(cmdp->cmd, '"');
888 if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", (int)(strchr(p + 1, '"') - p + 1), p)) {
889 resp = RESP_BAD;
890 goto normal;
891 }
892 /* not waiting here violates the spec, but a server that does not
893 grok this nonetheless violates it too. */
894 cmdp->cb.create = 0;
895 if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
896 resp = RESP_BAD;
897 goto normal;
898 }
899 free(cmdp->cmd);
900 free(cmdp);
901 if (!tcmd)
902 return 0; /* ignored */
903 if (cmdp == tcmd)
904 tcmd = ncmdp;
905 continue;
906 }
907 resp = RESP_NO;
908 } else /*if (!strcmp("BAD", arg))*/
909 resp = RESP_BAD;
910 fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
911 memcmp(cmdp->cmd, "LOGIN", 5) ?
912 cmdp->cmd : "LOGIN <user> <pass>",
913 arg, cmd ? cmd : "");
914 }
915 if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
916 resp = resp2;
917 normal:
918 if (cmdp->cb.done)
919 cmdp->cb.done(ctx, cmdp, resp);
920 free(cmdp->cb.data);
921 free(cmdp->cmd);
922 free(cmdp);
923 if (!tcmd || tcmd == cmdp)
924 return resp;
925 }
926 }
927 /* not reached */
928 }
929
930 static void imap_close_server(struct imap_store *ictx)
931 {
932 struct imap *imap = ictx->imap;
933
934 if (imap->buf.sock.fd[0] != -1) {
935 imap_exec(ictx, NULL, "LOGOUT");
936 socket_shutdown(&imap->buf.sock);
937 }
938 free_list(imap->ns_personal);
939 free_list(imap->ns_other);
940 free_list(imap->ns_shared);
941 free(imap);
942 }
943
944 static void imap_close_store(struct store *ctx)
945 {
946 imap_close_server((struct imap_store *)ctx);
947 free_generic_messages(ctx->msgs);
948 free(ctx);
949 }
950
951 static struct store *imap_open_store(struct imap_server_conf *srvc)
952 {
953 struct imap_store *ctx;
954 struct imap *imap;
955 char *arg, *rsp;
956 int s = -1, preauth;
957
958 ctx = xcalloc(sizeof(*ctx), 1);
959
960 ctx->imap = imap = xcalloc(sizeof(*imap), 1);
961 imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
962 imap->in_progress_append = &imap->in_progress;
963
964 /* open connection to IMAP server */
965
966 if (srvc->tunnel) {
967 const char *argv[] = { srvc->tunnel, NULL };
968 struct child_process tunnel = {0};
969
970 imap_info("Starting tunnel '%s'... ", srvc->tunnel);
971
972 tunnel.argv = argv;
973 tunnel.use_shell = 1;
974 tunnel.in = -1;
975 tunnel.out = -1;
976 if (start_command(&tunnel))
977 die("cannot start proxy %s", argv[0]);
978
979 imap->buf.sock.fd[0] = tunnel.out;
980 imap->buf.sock.fd[1] = tunnel.in;
981
982 imap_info("ok\n");
983 } else {
984 #ifndef NO_IPV6
985 struct addrinfo hints, *ai0, *ai;
986 int gai;
987 char portstr[6];
988
989 snprintf(portstr, sizeof(portstr), "%hu", srvc->port);
990
991 memset(&hints, 0, sizeof(hints));
992 hints.ai_socktype = SOCK_STREAM;
993 hints.ai_protocol = IPPROTO_TCP;
994
995 imap_info("Resolving %s... ", srvc->host);
996 gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
997 if (gai) {
998 fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
999 goto bail;
1000 }
1001 imap_info("ok\n");
1002
1003 for (ai0 = ai; ai; ai = ai->ai_next) {
1004 char addr[NI_MAXHOST];
1005
1006 s = socket(ai->ai_family, ai->ai_socktype,
1007 ai->ai_protocol);
1008 if (s < 0)
1009 continue;
1010
1011 getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1012 sizeof(addr), NULL, 0, NI_NUMERICHOST);
1013 imap_info("Connecting to [%s]:%s... ", addr, portstr);
1014
1015 if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1016 close(s);
1017 s = -1;
1018 perror("connect");
1019 continue;
1020 }
1021
1022 break;
1023 }
1024 freeaddrinfo(ai0);
1025 #else /* NO_IPV6 */
1026 struct hostent *he;
1027 struct sockaddr_in addr;
1028
1029 memset(&addr, 0, sizeof(addr));
1030 addr.sin_port = htons(srvc->port);
1031 addr.sin_family = AF_INET;
1032
1033 imap_info("Resolving %s... ", srvc->host);
1034 he = gethostbyname(srvc->host);
1035 if (!he) {
1036 perror("gethostbyname");
1037 goto bail;
1038 }
1039 imap_info("ok\n");
1040
1041 addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1042
1043 s = socket(PF_INET, SOCK_STREAM, 0);
1044
1045 imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1046 if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1047 close(s);
1048 s = -1;
1049 perror("connect");
1050 }
1051 #endif
1052 if (s < 0) {
1053 fputs("Error: unable to connect to server.\n", stderr);
1054 goto bail;
1055 }
1056
1057 imap->buf.sock.fd[0] = s;
1058 imap->buf.sock.fd[1] = dup(s);
1059
1060 if (srvc->use_ssl &&
1061 ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1062 close(s);
1063 goto bail;
1064 }
1065 imap_info("ok\n");
1066 }
1067
1068 /* read the greeting string */
1069 if (buffer_gets(&imap->buf, &rsp)) {
1070 fprintf(stderr, "IMAP error: no greeting response\n");
1071 goto bail;
1072 }
1073 arg = next_arg(&rsp);
1074 if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1075 fprintf(stderr, "IMAP error: invalid greeting response\n");
1076 goto bail;
1077 }
1078 preauth = 0;
1079 if (!strcmp("PREAUTH", arg))
1080 preauth = 1;
1081 else if (strcmp("OK", arg) != 0) {
1082 fprintf(stderr, "IMAP error: unknown greeting response\n");
1083 goto bail;
1084 }
1085 parse_response_code(ctx, NULL, rsp);
1086 if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1087 goto bail;
1088
1089 if (!preauth) {
1090 #ifndef NO_OPENSSL
1091 if (!srvc->use_ssl && CAP(STARTTLS)) {
1092 if (imap_exec(ctx, 0, "STARTTLS") != RESP_OK)
1093 goto bail;
1094 if (ssl_socket_connect(&imap->buf.sock, 1,
1095 srvc->ssl_verify))
1096 goto bail;
1097 /* capabilities may have changed, so get the new capabilities */
1098 if (imap_exec(ctx, 0, "CAPABILITY") != RESP_OK)
1099 goto bail;
1100 }
1101 #endif
1102 imap_info("Logging in...\n");
1103 if (!srvc->user) {
1104 fprintf(stderr, "Skipping server %s, no user\n", srvc->host);
1105 goto bail;
1106 }
1107 if (!srvc->pass) {
1108 char prompt[80];
1109 sprintf(prompt, "Password (%s@%s): ", srvc->user, srvc->host);
1110 arg = getpass(prompt);
1111 if (!arg) {
1112 perror("getpass");
1113 exit(1);
1114 }
1115 if (!*arg) {
1116 fprintf(stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host);
1117 goto bail;
1118 }
1119 /*
1120 * getpass() returns a pointer to a static buffer. make a copy
1121 * for long term storage.
1122 */
1123 srvc->pass = xstrdup(arg);
1124 }
1125 if (CAP(NOLOGIN)) {
1126 fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1127 goto bail;
1128 }
1129 if (!imap->buf.sock.ssl)
1130 imap_warn("*** IMAP Warning *** Password is being "
1131 "sent in the clear\n");
1132 if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1133 fprintf(stderr, "IMAP error: LOGIN failed\n");
1134 goto bail;
1135 }
1136 } /* !preauth */
1137
1138 ctx->prefix = "";
1139 ctx->trashnc = 1;
1140 return (struct store *)ctx;
1141
1142 bail:
1143 imap_close_store(&ctx->gen);
1144 return NULL;
1145 }
1146
1147 static int imap_make_flags(int flags, char *buf)
1148 {
1149 const char *s;
1150 unsigned i, d;
1151
1152 for (i = d = 0; i < ARRAY_SIZE(Flags); i++)
1153 if (flags & (1 << i)) {
1154 buf[d++] = ' ';
1155 buf[d++] = '\\';
1156 for (s = Flags[i]; *s; s++)
1157 buf[d++] = *s;
1158 }
1159 buf[0] = '(';
1160 buf[d++] = ')';
1161 return d;
1162 }
1163
1164 static void lf_to_crlf(struct msg_data *msg)
1165 {
1166 char *new;
1167 int i, j, lfnum = 0;
1168
1169 if (msg->data[0] == '\n')
1170 lfnum++;
1171 for (i = 1; i < msg->len; i++) {
1172 if (msg->data[i - 1] != '\r' && msg->data[i] == '\n')
1173 lfnum++;
1174 }
1175
1176 new = xmalloc(msg->len + lfnum);
1177 if (msg->data[0] == '\n') {
1178 new[0] = '\r';
1179 new[1] = '\n';
1180 i = 1;
1181 j = 2;
1182 } else {
1183 new[0] = msg->data[0];
1184 i = 1;
1185 j = 1;
1186 }
1187 for ( ; i < msg->len; i++) {
1188 if (msg->data[i] != '\n') {
1189 new[j++] = msg->data[i];
1190 continue;
1191 }
1192 if (msg->data[i - 1] != '\r')
1193 new[j++] = '\r';
1194 /* otherwise it already had CR before */
1195 new[j++] = '\n';
1196 }
1197 msg->len += lfnum;
1198 free(msg->data);
1199 msg->data = new;
1200 }
1201
1202 static int imap_store_msg(struct store *gctx, struct msg_data *data)
1203 {
1204 struct imap_store *ctx = (struct imap_store *)gctx;
1205 struct imap *imap = ctx->imap;
1206 struct imap_cmd_cb cb;
1207 const char *prefix, *box;
1208 int ret, d;
1209 char flagstr[128];
1210
1211 lf_to_crlf(data);
1212 memset(&cb, 0, sizeof(cb));
1213
1214 cb.dlen = data->len;
1215 cb.data = xmalloc(cb.dlen);
1216 memcpy(cb.data, data->data, data->len);
1217
1218 d = 0;
1219 if (data->flags) {
1220 d = imap_make_flags(data->flags, flagstr);
1221 flagstr[d++] = ' ';
1222 }
1223 flagstr[d] = 0;
1224
1225 box = gctx->name;
1226 prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1227 cb.create = 0;
1228 ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" %s", prefix, box, flagstr);
1229 imap->caps = imap->rcaps;
1230 if (ret != DRV_OK)
1231 return ret;
1232 gctx->count++;
1233
1234 return DRV_OK;
1235 }
1236
1237 static void encode_html_chars(struct strbuf *p)
1238 {
1239 int i;
1240 for (i = 0; i < p->len; i++) {
1241 if (p->buf[i] == '&')
1242 strbuf_splice(p, i, 1, "&amp;", 5);
1243 if (p->buf[i] == '<')
1244 strbuf_splice(p, i, 1, "&lt;", 4);
1245 if (p->buf[i] == '>')
1246 strbuf_splice(p, i, 1, "&gt;", 4);
1247 if (p->buf[i] == '"')
1248 strbuf_splice(p, i, 1, "&quot;", 6);
1249 }
1250 }
1251 static void wrap_in_html(struct msg_data *msg)
1252 {
1253 struct strbuf buf = STRBUF_INIT;
1254 struct strbuf **lines;
1255 struct strbuf **p;
1256 static char *content_type = "Content-Type: text/html;\n";
1257 static char *pre_open = "<pre>\n";
1258 static char *pre_close = "</pre>\n";
1259 int added_header = 0;
1260
1261 strbuf_attach(&buf, msg->data, msg->len, msg->len);
1262 lines = strbuf_split(&buf, '\n');
1263 strbuf_release(&buf);
1264 for (p = lines; *p; p++) {
1265 if (! added_header) {
1266 if ((*p)->len == 1 && *((*p)->buf) == '\n') {
1267 strbuf_addstr(&buf, content_type);
1268 strbuf_addbuf(&buf, *p);
1269 strbuf_addstr(&buf, pre_open);
1270 added_header = 1;
1271 continue;
1272 }
1273 }
1274 else
1275 encode_html_chars(*p);
1276 strbuf_addbuf(&buf, *p);
1277 }
1278 strbuf_addstr(&buf, pre_close);
1279 strbuf_list_free(lines);
1280 msg->len = buf.len;
1281 msg->data = strbuf_detach(&buf, NULL);
1282 }
1283
1284 #define CHUNKSIZE 0x1000
1285
1286 static int read_message(FILE *f, struct msg_data *msg)
1287 {
1288 struct strbuf buf = STRBUF_INIT;
1289
1290 memset(msg, 0, sizeof(*msg));
1291
1292 do {
1293 if (strbuf_fread(&buf, CHUNKSIZE, f) <= 0)
1294 break;
1295 } while (!feof(f));
1296
1297 msg->len = buf.len;
1298 msg->data = strbuf_detach(&buf, NULL);
1299 return msg->len;
1300 }
1301
1302 static int count_messages(struct msg_data *msg)
1303 {
1304 int count = 0;
1305 char *p = msg->data;
1306
1307 while (1) {
1308 if (!prefixcmp(p, "From ")) {
1309 count++;
1310 p += 5;
1311 }
1312 p = strstr(p+5, "\nFrom ");
1313 if (!p)
1314 break;
1315 p++;
1316 }
1317 return count;
1318 }
1319
1320 static int split_msg(struct msg_data *all_msgs, struct msg_data *msg, int *ofs)
1321 {
1322 char *p, *data;
1323
1324 memset(msg, 0, sizeof *msg);
1325 if (*ofs >= all_msgs->len)
1326 return 0;
1327
1328 data = &all_msgs->data[*ofs];
1329 msg->len = all_msgs->len - *ofs;
1330
1331 if (msg->len < 5 || prefixcmp(data, "From "))
1332 return 0;
1333
1334 p = strchr(data, '\n');
1335 if (p) {
1336 p = &p[1];
1337 msg->len -= p-data;
1338 *ofs += p-data;
1339 data = p;
1340 }
1341
1342 p = strstr(data, "\nFrom ");
1343 if (p)
1344 msg->len = &p[1] - data;
1345
1346 msg->data = xmemdupz(data, msg->len);
1347 *ofs += msg->len;
1348 return 1;
1349 }
1350
1351 static struct imap_server_conf server = {
1352 NULL, /* name */
1353 NULL, /* tunnel */
1354 NULL, /* host */
1355 0, /* port */
1356 NULL, /* user */
1357 NULL, /* pass */
1358 0, /* use_ssl */
1359 1, /* ssl_verify */
1360 0, /* use_html */
1361 };
1362
1363 static char *imap_folder;
1364
1365 static int git_imap_config(const char *key, const char *val, void *cb)
1366 {
1367 char imap_key[] = "imap.";
1368
1369 if (strncmp(key, imap_key, sizeof imap_key - 1))
1370 return 0;
1371
1372 key += sizeof imap_key - 1;
1373
1374 /* check booleans first, and barf on others */
1375 if (!strcmp("sslverify", key))
1376 server.ssl_verify = git_config_bool(key, val);
1377 else if (!strcmp("preformattedhtml", key))
1378 server.use_html = git_config_bool(key, val);
1379 else if (!val)
1380 return config_error_nonbool(key);
1381
1382 if (!strcmp("folder", key)) {
1383 imap_folder = xstrdup(val);
1384 } else if (!strcmp("host", key)) {
1385 if (!prefixcmp(val, "imap:"))
1386 val += 5;
1387 else if (!prefixcmp(val, "imaps:")) {
1388 val += 6;
1389 server.use_ssl = 1;
1390 }
1391 if (!prefixcmp(val, "//"))
1392 val += 2;
1393 server.host = xstrdup(val);
1394 } else if (!strcmp("user", key))
1395 server.user = xstrdup(val);
1396 else if (!strcmp("pass", key))
1397 server.pass = xstrdup(val);
1398 else if (!strcmp("port", key))
1399 server.port = git_config_int(key, val);
1400 else if (!strcmp("tunnel", key))
1401 server.tunnel = xstrdup(val);
1402 return 0;
1403 }
1404
1405 int main(int argc, char **argv)
1406 {
1407 struct msg_data all_msgs, msg;
1408 struct store *ctx = NULL;
1409 int ofs = 0;
1410 int r;
1411 int total, n = 0;
1412 int nongit_ok;
1413
1414 git_extract_argv0_path(argv[0]);
1415
1416 if (argc != 1)
1417 usage(imap_send_usage);
1418
1419 setup_git_directory_gently(&nongit_ok);
1420 git_config(git_imap_config, NULL);
1421
1422 if (!server.port)
1423 server.port = server.use_ssl ? 993 : 143;
1424
1425 if (!imap_folder) {
1426 fprintf(stderr, "no imap store specified\n");
1427 return 1;
1428 }
1429 if (!server.host) {
1430 if (!server.tunnel) {
1431 fprintf(stderr, "no imap host specified\n");
1432 return 1;
1433 }
1434 server.host = "tunnel";
1435 }
1436
1437 /* read the messages */
1438 if (!read_message(stdin, &all_msgs)) {
1439 fprintf(stderr, "nothing to send\n");
1440 return 1;
1441 }
1442
1443 total = count_messages(&all_msgs);
1444 if (!total) {
1445 fprintf(stderr, "no messages to send\n");
1446 return 1;
1447 }
1448
1449 /* write it to the imap server */
1450 ctx = imap_open_store(&server);
1451 if (!ctx) {
1452 fprintf(stderr, "failed to open store\n");
1453 return 1;
1454 }
1455
1456 fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1457 ctx->name = imap_folder;
1458 while (1) {
1459 unsigned percent = n * 100 / total;
1460 fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1461 if (!split_msg(&all_msgs, &msg, &ofs))
1462 break;
1463 if (server.use_html)
1464 wrap_in_html(&msg);
1465 r = imap_store_msg(ctx, &msg);
1466 if (r != DRV_OK)
1467 break;
1468 n++;
1469 }
1470 fprintf(stderr, "\n");
1471
1472 imap_close_store(ctx);
1473
1474 return 0;
1475 }
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