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imap-send.c: remove some unused fields from struct store
[git/mingw.git] / imap-send.c
blob131325a31940904a48b7b8fa00b4d673bda40da1
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 #include "prompt.h"
29 #ifdef NO_OPENSSL
30 typedef void *SSL;
31 #else
32 #include <openssl/evp.h>
33 #include <openssl/hmac.h>
34 #endif
35
36 struct store {
37 /* currently open mailbox */
38 const char *name; /* foreign! maybe preset? */
39 int uidvalidity;
40 };
41
42 static const char imap_send_usage[] = "git imap-send < <mbox>";
43
44 #undef DRV_OK
45 #define DRV_OK 0
46 #define DRV_MSG_BAD -1
47 #define DRV_BOX_BAD -2
48 #define DRV_STORE_BAD -3
49
50 static int Verbose, Quiet;
51
52 __attribute__((format (printf, 1, 2)))
53 static void imap_info(const char *, ...);
54 __attribute__((format (printf, 1, 2)))
55 static void imap_warn(const char *, ...);
56
57 static char *next_arg(char **);
58
59 __attribute__((format (printf, 3, 4)))
60 static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
61
62 static int nfvasprintf(char **strp, const char *fmt, va_list ap)
63 {
64 int len;
65 char tmp[8192];
66
67 len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
68 if (len < 0)
69 die("Fatal: Out of memory");
70 if (len >= sizeof(tmp))
71 die("imap command overflow!");
72 *strp = xmemdupz(tmp, len);
73 return len;
74 }
75
76 struct imap_server_conf {
77 char *name;
78 char *tunnel;
79 char *host;
80 int port;
81 char *user;
82 char *pass;
83 int use_ssl;
84 int ssl_verify;
85 int use_html;
86 char *auth_method;
87 };
88
89 static struct imap_server_conf server = {
90 NULL, /* name */
91 NULL, /* tunnel */
92 NULL, /* host */
93 0, /* port */
94 NULL, /* user */
95 NULL, /* pass */
96 0, /* use_ssl */
97 1, /* ssl_verify */
98 0, /* use_html */
99 NULL, /* auth_method */
100 };
101
102 #define NIL (void *)0x1
103 #define LIST (void *)0x2
104
105 struct imap_list {
106 struct imap_list *next, *child;
107 char *val;
108 int len;
109 };
110
111 struct imap_socket {
112 int fd[2];
113 SSL *ssl;
114 };
115
116 struct imap_buffer {
117 struct imap_socket sock;
118 int bytes;
119 int offset;
120 char buf[1024];
121 };
122
123 struct imap_cmd;
124
125 struct imap {
126 int uidnext; /* from SELECT responses */
127 struct imap_list *ns_personal, *ns_other, *ns_shared; /* NAMESPACE info */
128 unsigned caps, rcaps; /* CAPABILITY results */
129 /* command queue */
130 int nexttag, num_in_progress, literal_pending;
131 struct imap_cmd *in_progress, **in_progress_append;
132 struct imap_buffer buf; /* this is BIG, so put it last */
133 };
134
135 struct imap_store {
136 struct store gen;
137 int uidvalidity;
138 struct imap *imap;
139 const char *prefix;
140 unsigned /*currentnc:1,*/ trashnc:1;
141 };
142
143 struct imap_cmd_cb {
144 int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
145 void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
146 void *ctx;
147 char *data;
148 int dlen;
149 int uid;
150 unsigned create:1, trycreate:1;
151 };
152
153 struct imap_cmd {
154 struct imap_cmd *next;
155 struct imap_cmd_cb cb;
156 char *cmd;
157 int tag;
158 };
159
160 #define CAP(cap) (imap->caps & (1 << (cap)))
161
162 enum CAPABILITY {
163 NOLOGIN = 0,
164 UIDPLUS,
165 LITERALPLUS,
166 NAMESPACE,
167 STARTTLS,
168 AUTH_CRAM_MD5
169 };
170
171 static const char *cap_list[] = {
172 "LOGINDISABLED",
173 "UIDPLUS",
174 "LITERAL+",
175 "NAMESPACE",
176 "STARTTLS",
177 "AUTH=CRAM-MD5",
178 };
179
180 #define RESP_OK 0
181 #define RESP_NO 1
182 #define RESP_BAD 2
183
184 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
185
186
187 #ifndef NO_OPENSSL
188 static void ssl_socket_perror(const char *func)
189 {
190 fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
191 }
192 #endif
193
194 static void socket_perror(const char *func, struct imap_socket *sock, int ret)
195 {
196 #ifndef NO_OPENSSL
197 if (sock->ssl) {
198 int sslerr = SSL_get_error(sock->ssl, ret);
199 switch (sslerr) {
200 case SSL_ERROR_NONE:
201 break;
202 case SSL_ERROR_SYSCALL:
203 perror("SSL_connect");
204 break;
205 default:
206 ssl_socket_perror("SSL_connect");
207 break;
208 }
209 } else
210 #endif
211 {
212 if (ret < 0)
213 perror(func);
214 else
215 fprintf(stderr, "%s: unexpected EOF\n", func);
216 }
217 }
218
219 static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
220 {
221 #ifdef NO_OPENSSL
222 fprintf(stderr, "SSL requested but SSL support not compiled in\n");
223 return -1;
224 #else
225 #if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
226 const SSL_METHOD *meth;
227 #else
228 SSL_METHOD *meth;
229 #endif
230 SSL_CTX *ctx;
231 int ret;
232
233 SSL_library_init();
234 SSL_load_error_strings();
235
236 if (use_tls_only)
237 meth = TLSv1_method();
238 else
239 meth = SSLv23_method();
240
241 if (!meth) {
242 ssl_socket_perror("SSLv23_method");
243 return -1;
244 }
245
246 ctx = SSL_CTX_new(meth);
247
248 if (verify)
249 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
250
251 if (!SSL_CTX_set_default_verify_paths(ctx)) {
252 ssl_socket_perror("SSL_CTX_set_default_verify_paths");
253 return -1;
254 }
255 sock->ssl = SSL_new(ctx);
256 if (!sock->ssl) {
257 ssl_socket_perror("SSL_new");
258 return -1;
259 }
260 if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
261 ssl_socket_perror("SSL_set_rfd");
262 return -1;
263 }
264 if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
265 ssl_socket_perror("SSL_set_wfd");
266 return -1;
267 }
268
269 ret = SSL_connect(sock->ssl);
270 if (ret <= 0) {
271 socket_perror("SSL_connect", sock, ret);
272 return -1;
273 }
274
275 return 0;
276 #endif
277 }
278
279 static int socket_read(struct imap_socket *sock, char *buf, int len)
280 {
281 ssize_t n;
282 #ifndef NO_OPENSSL
283 if (sock->ssl)
284 n = SSL_read(sock->ssl, buf, len);
285 else
286 #endif
287 n = xread(sock->fd[0], buf, len);
288 if (n <= 0) {
289 socket_perror("read", sock, n);
290 close(sock->fd[0]);
291 close(sock->fd[1]);
292 sock->fd[0] = sock->fd[1] = -1;
293 }
294 return n;
295 }
296
297 static int socket_write(struct imap_socket *sock, const char *buf, int len)
298 {
299 int n;
300 #ifndef NO_OPENSSL
301 if (sock->ssl)
302 n = SSL_write(sock->ssl, buf, len);
303 else
304 #endif
305 n = write_in_full(sock->fd[1], buf, len);
306 if (n != len) {
307 socket_perror("write", sock, n);
308 close(sock->fd[0]);
309 close(sock->fd[1]);
310 sock->fd[0] = sock->fd[1] = -1;
311 }
312 return n;
313 }
314
315 static void socket_shutdown(struct imap_socket *sock)
316 {
317 #ifndef NO_OPENSSL
318 if (sock->ssl) {
319 SSL_shutdown(sock->ssl);
320 SSL_free(sock->ssl);
321 }
322 #endif
323 close(sock->fd[0]);
324 close(sock->fd[1]);
325 }
326
327 /* simple line buffering */
328 static int buffer_gets(struct imap_buffer *b, char **s)
329 {
330 int n;
331 int start = b->offset;
332
333 *s = b->buf + start;
334
335 for (;;) {
336 /* make sure we have enough data to read the \r\n sequence */
337 if (b->offset + 1 >= b->bytes) {
338 if (start) {
339 /* shift down used bytes */
340 *s = b->buf;
341
342 assert(start <= b->bytes);
343 n = b->bytes - start;
344
345 if (n)
346 memmove(b->buf, b->buf + start, n);
347 b->offset -= start;
348 b->bytes = n;
349 start = 0;
350 }
351
352 n = socket_read(&b->sock, b->buf + b->bytes,
353 sizeof(b->buf) - b->bytes);
354
355 if (n <= 0)
356 return -1;
357
358 b->bytes += n;
359 }
360
361 if (b->buf[b->offset] == '\r') {
362 assert(b->offset + 1 < b->bytes);
363 if (b->buf[b->offset + 1] == '\n') {
364 b->buf[b->offset] = 0; /* terminate the string */
365 b->offset += 2; /* next line */
366 if (Verbose)
367 puts(*s);
368 return 0;
369 }
370 }
371
372 b->offset++;
373 }
374 /* not reached */
375 }
376
377 static void imap_info(const char *msg, ...)
378 {
379 va_list va;
380
381 if (!Quiet) {
382 va_start(va, msg);
383 vprintf(msg, va);
384 va_end(va);
385 fflush(stdout);
386 }
387 }
388
389 static void imap_warn(const char *msg, ...)
390 {
391 va_list va;
392
393 if (Quiet < 2) {
394 va_start(va, msg);
395 vfprintf(stderr, msg, va);
396 va_end(va);
397 }
398 }
399
400 static char *next_arg(char **s)
401 {
402 char *ret;
403
404 if (!s || !*s)
405 return NULL;
406 while (isspace((unsigned char) **s))
407 (*s)++;
408 if (!**s) {
409 *s = NULL;
410 return NULL;
411 }
412 if (**s == '"') {
413 ++*s;
414 ret = *s;
415 *s = strchr(*s, '"');
416 } else {
417 ret = *s;
418 while (**s && !isspace((unsigned char) **s))
419 (*s)++;
420 }
421 if (*s) {
422 if (**s)
423 *(*s)++ = 0;
424 if (!**s)
425 *s = NULL;
426 }
427 return ret;
428 }
429
430 static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
431 {
432 int ret;
433 va_list va;
434
435 va_start(va, fmt);
436 if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
437 die("Fatal: buffer too small. Please report a bug.");
438 va_end(va);
439 return ret;
440 }
441
442 static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
443 struct imap_cmd_cb *cb,
444 const char *fmt, va_list ap)
445 {
446 struct imap *imap = ctx->imap;
447 struct imap_cmd *cmd;
448 int n, bufl;
449 char buf[1024];
450
451 cmd = xmalloc(sizeof(struct imap_cmd));
452 nfvasprintf(&cmd->cmd, fmt, ap);
453 cmd->tag = ++imap->nexttag;
454
455 if (cb)
456 cmd->cb = *cb;
457 else
458 memset(&cmd->cb, 0, sizeof(cmd->cb));
459
460 while (imap->literal_pending)
461 get_cmd_result(ctx, NULL);
462
463 if (!cmd->cb.data)
464 bufl = nfsnprintf(buf, sizeof(buf), "%d %s\r\n", cmd->tag, cmd->cmd);
465 else
466 bufl = nfsnprintf(buf, sizeof(buf), "%d %s{%d%s}\r\n",
467 cmd->tag, cmd->cmd, cmd->cb.dlen,
468 CAP(LITERALPLUS) ? "+" : "");
469
470 if (Verbose) {
471 if (imap->num_in_progress)
472 printf("(%d in progress) ", imap->num_in_progress);
473 if (memcmp(cmd->cmd, "LOGIN", 5))
474 printf(">>> %s", buf);
475 else
476 printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
477 }
478 if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
479 free(cmd->cmd);
480 free(cmd);
481 if (cb)
482 free(cb->data);
483 return NULL;
484 }
485 if (cmd->cb.data) {
486 if (CAP(LITERALPLUS)) {
487 n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
488 free(cmd->cb.data);
489 if (n != cmd->cb.dlen ||
490 socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
491 free(cmd->cmd);
492 free(cmd);
493 return NULL;
494 }
495 cmd->cb.data = NULL;
496 } else
497 imap->literal_pending = 1;
498 } else if (cmd->cb.cont)
499 imap->literal_pending = 1;
500 cmd->next = NULL;
501 *imap->in_progress_append = cmd;
502 imap->in_progress_append = &cmd->next;
503 imap->num_in_progress++;
504 return cmd;
505 }
506
507 __attribute__((format (printf, 3, 4)))
508 static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
509 struct imap_cmd_cb *cb,
510 const char *fmt, ...)
511 {
512 struct imap_cmd *ret;
513 va_list ap;
514
515 va_start(ap, fmt);
516 ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
517 va_end(ap);
518 return ret;
519 }
520
521 __attribute__((format (printf, 3, 4)))
522 static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
523 const char *fmt, ...)
524 {
525 va_list ap;
526 struct imap_cmd *cmdp;
527
528 va_start(ap, fmt);
529 cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
530 va_end(ap);
531 if (!cmdp)
532 return RESP_BAD;
533
534 return get_cmd_result(ctx, cmdp);
535 }
536
537 __attribute__((format (printf, 3, 4)))
538 static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
539 const char *fmt, ...)
540 {
541 va_list ap;
542 struct imap_cmd *cmdp;
543
544 va_start(ap, fmt);
545 cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
546 va_end(ap);
547 if (!cmdp)
548 return DRV_STORE_BAD;
549
550 switch (get_cmd_result(ctx, cmdp)) {
551 case RESP_BAD: return DRV_STORE_BAD;
552 case RESP_NO: return DRV_MSG_BAD;
553 default: return DRV_OK;
554 }
555 }
556
557 static int is_atom(struct imap_list *list)
558 {
559 return list && list->val && list->val != NIL && list->val != LIST;
560 }
561
562 static int is_list(struct imap_list *list)
563 {
564 return list && list->val == LIST;
565 }
566
567 static void free_list(struct imap_list *list)
568 {
569 struct imap_list *tmp;
570
571 for (; list; list = tmp) {
572 tmp = list->next;
573 if (is_list(list))
574 free_list(list->child);
575 else if (is_atom(list))
576 free(list->val);
577 free(list);
578 }
579 }
580
581 static int parse_imap_list_l(struct imap *imap, char **sp, struct imap_list **curp, int level)
582 {
583 struct imap_list *cur;
584 char *s = *sp, *p;
585 int n, bytes;
586
587 for (;;) {
588 while (isspace((unsigned char)*s))
589 s++;
590 if (level && *s == ')') {
591 s++;
592 break;
593 }
594 *curp = cur = xmalloc(sizeof(*cur));
595 curp = &cur->next;
596 cur->val = NULL; /* for clean bail */
597 if (*s == '(') {
598 /* sublist */
599 s++;
600 cur->val = LIST;
601 if (parse_imap_list_l(imap, &s, &cur->child, level + 1))
602 goto bail;
603 } else if (imap && *s == '{') {
604 /* literal */
605 bytes = cur->len = strtol(s + 1, &s, 10);
606 if (*s != '}')
607 goto bail;
608
609 s = cur->val = xmalloc(cur->len);
610
611 /* dump whats left over in the input buffer */
612 n = imap->buf.bytes - imap->buf.offset;
613
614 if (n > bytes)
615 /* the entire message fit in the buffer */
616 n = bytes;
617
618 memcpy(s, imap->buf.buf + imap->buf.offset, n);
619 s += n;
620 bytes -= n;
621
622 /* mark that we used part of the buffer */
623 imap->buf.offset += n;
624
625 /* now read the rest of the message */
626 while (bytes > 0) {
627 if ((n = socket_read(&imap->buf.sock, s, bytes)) <= 0)
628 goto bail;
629 s += n;
630 bytes -= n;
631 }
632
633 if (buffer_gets(&imap->buf, &s))
634 goto bail;
635 } else if (*s == '"') {
636 /* quoted string */
637 s++;
638 p = s;
639 for (; *s != '"'; s++)
640 if (!*s)
641 goto bail;
642 cur->len = s - p;
643 s++;
644 cur->val = xmemdupz(p, cur->len);
645 } else {
646 /* atom */
647 p = s;
648 for (; *s && !isspace((unsigned char)*s); s++)
649 if (level && *s == ')')
650 break;
651 cur->len = s - p;
652 if (cur->len == 3 && !memcmp("NIL", p, 3))
653 cur->val = NIL;
654 else
655 cur->val = xmemdupz(p, cur->len);
656 }
657
658 if (!level)
659 break;
660 if (!*s)
661 goto bail;
662 }
663 *sp = s;
664 *curp = NULL;
665 return 0;
666
667 bail:
668 *curp = NULL;
669 return -1;
670 }
671
672 static struct imap_list *parse_imap_list(struct imap *imap, char **sp)
673 {
674 struct imap_list *head;
675
676 if (!parse_imap_list_l(imap, sp, &head, 0))
677 return head;
678 free_list(head);
679 return NULL;
680 }
681
682 static struct imap_list *parse_list(char **sp)
683 {
684 return parse_imap_list(NULL, sp);
685 }
686
687 static void parse_capability(struct imap *imap, char *cmd)
688 {
689 char *arg;
690 unsigned i;
691
692 imap->caps = 0x80000000;
693 while ((arg = next_arg(&cmd)))
694 for (i = 0; i < ARRAY_SIZE(cap_list); i++)
695 if (!strcmp(cap_list[i], arg))
696 imap->caps |= 1 << i;
697 imap->rcaps = imap->caps;
698 }
699
700 static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
701 char *s)
702 {
703 struct imap *imap = ctx->imap;
704 char *arg, *p;
705
706 if (*s != '[')
707 return RESP_OK; /* no response code */
708 s++;
709 if (!(p = strchr(s, ']'))) {
710 fprintf(stderr, "IMAP error: malformed response code\n");
711 return RESP_BAD;
712 }
713 *p++ = 0;
714 arg = next_arg(&s);
715 if (!strcmp("UIDVALIDITY", arg)) {
716 if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg))) {
717 fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
718 return RESP_BAD;
719 }
720 } else if (!strcmp("UIDNEXT", arg)) {
721 if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
722 fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
723 return RESP_BAD;
724 }
725 } else if (!strcmp("CAPABILITY", arg)) {
726 parse_capability(imap, s);
727 } else if (!strcmp("ALERT", arg)) {
728 /* RFC2060 says that these messages MUST be displayed
729 * to the user
730 */
731 for (; isspace((unsigned char)*p); p++);
732 fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
733 } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
734 if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg)) ||
735 !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
736 fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
737 return RESP_BAD;
738 }
739 }
740 return RESP_OK;
741 }
742
743 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
744 {
745 struct imap *imap = ctx->imap;
746 struct imap_cmd *cmdp, **pcmdp, *ncmdp;
747 char *cmd, *arg, *arg1, *p;
748 int n, resp, resp2, tag;
749
750 for (;;) {
751 if (buffer_gets(&imap->buf, &cmd))
752 return RESP_BAD;
753
754 arg = next_arg(&cmd);
755 if (*arg == '*') {
756 arg = next_arg(&cmd);
757 if (!arg) {
758 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
759 return RESP_BAD;
760 }
761
762 if (!strcmp("NAMESPACE", arg)) {
763 imap->ns_personal = parse_list(&cmd);
764 imap->ns_other = parse_list(&cmd);
765 imap->ns_shared = parse_list(&cmd);
766 } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
767 !strcmp("NO", arg) || !strcmp("BYE", arg)) {
768 if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
769 return resp;
770 } else if (!strcmp("CAPABILITY", arg)) {
771 parse_capability(imap, cmd);
772 } else if ((arg1 = next_arg(&cmd))) {
773 ; /*
774 * Unhandled response-data with at least two words.
775 * Ignore it.
776 *
777 * NEEDSWORK: Previously this case handled '<num> EXISTS'
778 * and '<num> RECENT' but as a probably-unintended side
779 * effect it ignores other unrecognized two-word
780 * responses. imap-send doesn't ever try to read
781 * messages or mailboxes these days, so consider
782 * eliminating this case.
783 */
784 } else {
785 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
786 return RESP_BAD;
787 }
788 } else if (!imap->in_progress) {
789 fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
790 return RESP_BAD;
791 } else if (*arg == '+') {
792 /* This can happen only with the last command underway, as
793 it enforces a round-trip. */
794 cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
795 offsetof(struct imap_cmd, next));
796 if (cmdp->cb.data) {
797 n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
798 free(cmdp->cb.data);
799 cmdp->cb.data = NULL;
800 if (n != (int)cmdp->cb.dlen)
801 return RESP_BAD;
802 } else if (cmdp->cb.cont) {
803 if (cmdp->cb.cont(ctx, cmdp, cmd))
804 return RESP_BAD;
805 } else {
806 fprintf(stderr, "IMAP error: unexpected command continuation request\n");
807 return RESP_BAD;
808 }
809 if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
810 return RESP_BAD;
811 if (!cmdp->cb.cont)
812 imap->literal_pending = 0;
813 if (!tcmd)
814 return DRV_OK;
815 } else {
816 tag = atoi(arg);
817 for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
818 if (cmdp->tag == tag)
819 goto gottag;
820 fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
821 return RESP_BAD;
822 gottag:
823 if (!(*pcmdp = cmdp->next))
824 imap->in_progress_append = pcmdp;
825 imap->num_in_progress--;
826 if (cmdp->cb.cont || cmdp->cb.data)
827 imap->literal_pending = 0;
828 arg = next_arg(&cmd);
829 if (!strcmp("OK", arg))
830 resp = DRV_OK;
831 else {
832 if (!strcmp("NO", arg)) {
833 if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
834 p = strchr(cmdp->cmd, '"');
835 if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", (int)(strchr(p + 1, '"') - p + 1), p)) {
836 resp = RESP_BAD;
837 goto normal;
838 }
839 /* not waiting here violates the spec, but a server that does not
840 grok this nonetheless violates it too. */
841 cmdp->cb.create = 0;
842 if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
843 resp = RESP_BAD;
844 goto normal;
845 }
846 free(cmdp->cmd);
847 free(cmdp);
848 if (!tcmd)
849 return 0; /* ignored */
850 if (cmdp == tcmd)
851 tcmd = ncmdp;
852 continue;
853 }
854 resp = RESP_NO;
855 } else /*if (!strcmp("BAD", arg))*/
856 resp = RESP_BAD;
857 fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
858 memcmp(cmdp->cmd, "LOGIN", 5) ?
859 cmdp->cmd : "LOGIN <user> <pass>",
860 arg, cmd ? cmd : "");
861 }
862 if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
863 resp = resp2;
864 normal:
865 if (cmdp->cb.done)
866 cmdp->cb.done(ctx, cmdp, resp);
867 free(cmdp->cb.data);
868 free(cmdp->cmd);
869 free(cmdp);
870 if (!tcmd || tcmd == cmdp)
871 return resp;
872 }
873 }
874 /* not reached */
875 }
876
877 static void imap_close_server(struct imap_store *ictx)
878 {
879 struct imap *imap = ictx->imap;
880
881 if (imap->buf.sock.fd[0] != -1) {
882 imap_exec(ictx, NULL, "LOGOUT");
883 socket_shutdown(&imap->buf.sock);
884 }
885 free_list(imap->ns_personal);
886 free_list(imap->ns_other);
887 free_list(imap->ns_shared);
888 free(imap);
889 }
890
891 static void imap_close_store(struct store *ctx)
892 {
893 imap_close_server((struct imap_store *)ctx);
894 free(ctx);
895 }
896
897 #ifndef NO_OPENSSL
898
899 /*
900 * hexchar() and cram() functions are based on the code from the isync
901 * project (http://isync.sf.net/).
902 */
903 static char hexchar(unsigned int b)
904 {
905 return b < 10 ? '0' + b : 'a' + (b - 10);
906 }
907
908 #define ENCODED_SIZE(n) (4*((n+2)/3))
909 static char *cram(const char *challenge_64, const char *user, const char *pass)
910 {
911 int i, resp_len, encoded_len, decoded_len;
912 HMAC_CTX hmac;
913 unsigned char hash[16];
914 char hex[33];
915 char *response, *response_64, *challenge;
916
917 /*
918 * length of challenge_64 (i.e. base-64 encoded string) is a good
919 * enough upper bound for challenge (decoded result).
920 */
921 encoded_len = strlen(challenge_64);
922 challenge = xmalloc(encoded_len);
923 decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
924 (unsigned char *)challenge_64, encoded_len);
925 if (decoded_len < 0)
926 die("invalid challenge %s", challenge_64);
927 HMAC_Init(&hmac, (unsigned char *)pass, strlen(pass), EVP_md5());
928 HMAC_Update(&hmac, (unsigned char *)challenge, decoded_len);
929 HMAC_Final(&hmac, hash, NULL);
930 HMAC_CTX_cleanup(&hmac);
931
932 hex[32] = 0;
933 for (i = 0; i < 16; i++) {
934 hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
935 hex[2 * i + 1] = hexchar(hash[i] & 0xf);
936 }
937
938 /* response: "<user> <digest in hex>" */
939 resp_len = strlen(user) + 1 + strlen(hex) + 1;
940 response = xmalloc(resp_len);
941 sprintf(response, "%s %s", user, hex);
942
943 response_64 = xmalloc(ENCODED_SIZE(resp_len) + 1);
944 encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
945 (unsigned char *)response, resp_len);
946 if (encoded_len < 0)
947 die("EVP_EncodeBlock error");
948 response_64[encoded_len] = '\0';
949 return (char *)response_64;
950 }
951
952 #else
953
954 static char *cram(const char *challenge_64, const char *user, const char *pass)
955 {
956 die("If you want to use CRAM-MD5 authenticate method, "
957 "you have to build git-imap-send with OpenSSL library.");
958 }
959
960 #endif
961
962 static int auth_cram_md5(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt)
963 {
964 int ret;
965 char *response;
966
967 response = cram(prompt, server.user, server.pass);
968
969 ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
970 if (ret != strlen(response))
971 return error("IMAP error: sending response failed");
972
973 free(response);
974
975 return 0;
976 }
977
978 static struct store *imap_open_store(struct imap_server_conf *srvc)
979 {
980 struct imap_store *ctx;
981 struct imap *imap;
982 char *arg, *rsp;
983 int s = -1, preauth;
984
985 ctx = xcalloc(sizeof(*ctx), 1);
986
987 ctx->imap = imap = xcalloc(sizeof(*imap), 1);
988 imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
989 imap->in_progress_append = &imap->in_progress;
990
991 /* open connection to IMAP server */
992
993 if (srvc->tunnel) {
994 const char *argv[] = { srvc->tunnel, NULL };
995 struct child_process tunnel = {NULL};
996
997 imap_info("Starting tunnel '%s'... ", srvc->tunnel);
998
999 tunnel.argv = argv;
1000 tunnel.use_shell = 1;
1001 tunnel.in = -1;
1002 tunnel.out = -1;
1003 if (start_command(&tunnel))
1004 die("cannot start proxy %s", argv[0]);
1005
1006 imap->buf.sock.fd[0] = tunnel.out;
1007 imap->buf.sock.fd[1] = tunnel.in;
1008
1009 imap_info("ok\n");
1010 } else {
1011 #ifndef NO_IPV6
1012 struct addrinfo hints, *ai0, *ai;
1013 int gai;
1014 char portstr[6];
1015
1016 snprintf(portstr, sizeof(portstr), "%d", srvc->port);
1017
1018 memset(&hints, 0, sizeof(hints));
1019 hints.ai_socktype = SOCK_STREAM;
1020 hints.ai_protocol = IPPROTO_TCP;
1021
1022 imap_info("Resolving %s... ", srvc->host);
1023 gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
1024 if (gai) {
1025 fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
1026 goto bail;
1027 }
1028 imap_info("ok\n");
1029
1030 for (ai0 = ai; ai; ai = ai->ai_next) {
1031 char addr[NI_MAXHOST];
1032
1033 s = socket(ai->ai_family, ai->ai_socktype,
1034 ai->ai_protocol);
1035 if (s < 0)
1036 continue;
1037
1038 getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1039 sizeof(addr), NULL, 0, NI_NUMERICHOST);
1040 imap_info("Connecting to [%s]:%s... ", addr, portstr);
1041
1042 if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1043 close(s);
1044 s = -1;
1045 perror("connect");
1046 continue;
1047 }
1048
1049 break;
1050 }
1051 freeaddrinfo(ai0);
1052 #else /* NO_IPV6 */
1053 struct hostent *he;
1054 struct sockaddr_in addr;
1055
1056 memset(&addr, 0, sizeof(addr));
1057 addr.sin_port = htons(srvc->port);
1058 addr.sin_family = AF_INET;
1059
1060 imap_info("Resolving %s... ", srvc->host);
1061 he = gethostbyname(srvc->host);
1062 if (!he) {
1063 perror("gethostbyname");
1064 goto bail;
1065 }
1066 imap_info("ok\n");
1067
1068 addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1069
1070 s = socket(PF_INET, SOCK_STREAM, 0);
1071
1072 imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1073 if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1074 close(s);
1075 s = -1;
1076 perror("connect");
1077 }
1078 #endif
1079 if (s < 0) {
1080 fputs("Error: unable to connect to server.\n", stderr);
1081 goto bail;
1082 }
1083
1084 imap->buf.sock.fd[0] = s;
1085 imap->buf.sock.fd[1] = dup(s);
1086
1087 if (srvc->use_ssl &&
1088 ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1089 close(s);
1090 goto bail;
1091 }
1092 imap_info("ok\n");
1093 }
1094
1095 /* read the greeting string */
1096 if (buffer_gets(&imap->buf, &rsp)) {
1097 fprintf(stderr, "IMAP error: no greeting response\n");
1098 goto bail;
1099 }
1100 arg = next_arg(&rsp);
1101 if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1102 fprintf(stderr, "IMAP error: invalid greeting response\n");
1103 goto bail;
1104 }
1105 preauth = 0;
1106 if (!strcmp("PREAUTH", arg))
1107 preauth = 1;
1108 else if (strcmp("OK", arg) != 0) {
1109 fprintf(stderr, "IMAP error: unknown greeting response\n");
1110 goto bail;
1111 }
1112 parse_response_code(ctx, NULL, rsp);
1113 if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1114 goto bail;
1115
1116 if (!preauth) {
1117 #ifndef NO_OPENSSL
1118 if (!srvc->use_ssl && CAP(STARTTLS)) {
1119 if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK)
1120 goto bail;
1121 if (ssl_socket_connect(&imap->buf.sock, 1,
1122 srvc->ssl_verify))
1123 goto bail;
1124 /* capabilities may have changed, so get the new capabilities */
1125 if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1126 goto bail;
1127 }
1128 #endif
1129 imap_info("Logging in...\n");
1130 if (!srvc->user) {
1131 fprintf(stderr, "Skipping server %s, no user\n", srvc->host);
1132 goto bail;
1133 }
1134 if (!srvc->pass) {
1135 struct strbuf prompt = STRBUF_INIT;
1136 strbuf_addf(&prompt, "Password (%s@%s): ", srvc->user, srvc->host);
1137 arg = git_getpass(prompt.buf);
1138 strbuf_release(&prompt);
1139 if (!*arg) {
1140 fprintf(stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host);
1141 goto bail;
1142 }
1143 /*
1144 * getpass() returns a pointer to a static buffer. make a copy
1145 * for long term storage.
1146 */
1147 srvc->pass = xstrdup(arg);
1148 }
1149 if (CAP(NOLOGIN)) {
1150 fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1151 goto bail;
1152 }
1153
1154 if (srvc->auth_method) {
1155 struct imap_cmd_cb cb;
1156
1157 if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1158 if (!CAP(AUTH_CRAM_MD5)) {
1159 fprintf(stderr, "You specified"
1160 "CRAM-MD5 as authentication method, "
1161 "but %s doesn't support it.\n", srvc->host);
1162 goto bail;
1163 }
1164 /* CRAM-MD5 */
1165
1166 memset(&cb, 0, sizeof(cb));
1167 cb.cont = auth_cram_md5;
1168 if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1169 fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1170 goto bail;
1171 }
1172 } else {
1173 fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1174 goto bail;
1175 }
1176 } else {
1177 if (!imap->buf.sock.ssl)
1178 imap_warn("*** IMAP Warning *** Password is being "
1179 "sent in the clear\n");
1180 if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1181 fprintf(stderr, "IMAP error: LOGIN failed\n");
1182 goto bail;
1183 }
1184 }
1185 } /* !preauth */
1186
1187 ctx->prefix = "";
1188 ctx->trashnc = 1;
1189 return (struct store *)ctx;
1190
1191 bail:
1192 imap_close_store(&ctx->gen);
1193 return NULL;
1194 }
1195
1196 static void lf_to_crlf(struct strbuf *msg)
1197 {
1198 size_t new_len;
1199 char *new;
1200 int i, j, lfnum = 0;
1201
1202 if (msg->buf[0] == '\n')
1203 lfnum++;
1204 for (i = 1; i < msg->len; i++) {
1205 if (msg->buf[i - 1] != '\r' && msg->buf[i] == '\n')
1206 lfnum++;
1207 }
1208
1209 new_len = msg->len + lfnum;
1210 new = xmalloc(new_len + 1);
1211 if (msg->buf[0] == '\n') {
1212 new[0] = '\r';
1213 new[1] = '\n';
1214 i = 1;
1215 j = 2;
1216 } else {
1217 new[0] = msg->buf[0];
1218 i = 1;
1219 j = 1;
1220 }
1221 for ( ; i < msg->len; i++) {
1222 if (msg->buf[i] != '\n') {
1223 new[j++] = msg->buf[i];
1224 continue;
1225 }
1226 if (msg->buf[i - 1] != '\r')
1227 new[j++] = '\r';
1228 /* otherwise it already had CR before */
1229 new[j++] = '\n';
1230 }
1231 strbuf_attach(msg, new, new_len, new_len + 1);
1232 }
1233
1234 /*
1235 * Store msg to IMAP. Also detach and free the data from msg->data,
1236 * leaving msg->data empty.
1237 */
1238 static int imap_store_msg(struct store *gctx, struct strbuf *msg)
1239 {
1240 struct imap_store *ctx = (struct imap_store *)gctx;
1241 struct imap *imap = ctx->imap;
1242 struct imap_cmd_cb cb;
1243 const char *prefix, *box;
1244 int ret;
1245
1246 lf_to_crlf(msg);
1247 memset(&cb, 0, sizeof(cb));
1248
1249 cb.dlen = msg->len;
1250 cb.data = strbuf_detach(msg, NULL);
1251
1252 box = gctx->name;
1253 prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1254 cb.create = 0;
1255 ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" ", prefix, box);
1256 imap->caps = imap->rcaps;
1257 if (ret != DRV_OK)
1258 return ret;
1259
1260 return DRV_OK;
1261 }
1262
1263 static void wrap_in_html(struct strbuf *msg)
1264 {
1265 struct strbuf buf = STRBUF_INIT;
1266 static char *content_type = "Content-Type: text/html;\n";
1267 static char *pre_open = "<pre>\n";
1268 static char *pre_close = "</pre>\n";
1269 const char *body = strstr(msg->buf, "\n\n");
1270
1271 if (!body)
1272 return; /* Headers but no body; no wrapping needed */
1273
1274 body += 2;
1275
1276 strbuf_add(&buf, msg->buf, body - msg->buf - 1);
1277 strbuf_addstr(&buf, content_type);
1278 strbuf_addch(&buf, '\n');
1279 strbuf_addstr(&buf, pre_open);
1280 strbuf_addstr_xml_quoted(&buf, body);
1281 strbuf_addstr(&buf, pre_close);
1282
1283 strbuf_release(msg);
1284 *msg = buf;
1285 }
1286
1287 #define CHUNKSIZE 0x1000
1288
1289 static int read_message(FILE *f, struct strbuf *all_msgs)
1290 {
1291 do {
1292 if (strbuf_fread(all_msgs, CHUNKSIZE, f) <= 0)
1293 break;
1294 } while (!feof(f));
1295
1296 return ferror(f) ? -1 : 0;
1297 }
1298
1299 static int count_messages(struct strbuf *all_msgs)
1300 {
1301 int count = 0;
1302 char *p = all_msgs->buf;
1303
1304 while (1) {
1305 if (!prefixcmp(p, "From ")) {
1306 p = strstr(p+5, "\nFrom: ");
1307 if (!p) break;
1308 p = strstr(p+7, "\nDate: ");
1309 if (!p) break;
1310 p = strstr(p+7, "\nSubject: ");
1311 if (!p) break;
1312 p += 10;
1313 count++;
1314 }
1315 p = strstr(p+5, "\nFrom ");
1316 if (!p)
1317 break;
1318 p++;
1319 }
1320 return count;
1321 }
1322
1323 /*
1324 * Copy the next message from all_msgs, starting at offset *ofs, to
1325 * msg. Update *ofs to the start of the following message. Return
1326 * true iff a message was successfully copied.
1327 */
1328 static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs)
1329 {
1330 char *p, *data;
1331 size_t len;
1332
1333 if (*ofs >= all_msgs->len)
1334 return 0;
1335
1336 data = &all_msgs->buf[*ofs];
1337 len = all_msgs->len - *ofs;
1338
1339 if (len < 5 || prefixcmp(data, "From "))
1340 return 0;
1341
1342 p = strchr(data, '\n');
1343 if (p) {
1344 p++;
1345 len -= p - data;
1346 *ofs += p - data;
1347 data = p;
1348 }
1349
1350 p = strstr(data, "\nFrom ");
1351 if (p)
1352 len = &p[1] - data;
1353
1354 strbuf_add(msg, data, len);
1355 *ofs += len;
1356 return 1;
1357 }
1358
1359 static char *imap_folder;
1360
1361 static int git_imap_config(const char *key, const char *val, void *cb)
1362 {
1363 char imap_key[] = "imap.";
1364
1365 if (strncmp(key, imap_key, sizeof imap_key - 1))
1366 return 0;
1367
1368 key += sizeof imap_key - 1;
1369
1370 /* check booleans first, and barf on others */
1371 if (!strcmp("sslverify", key))
1372 server.ssl_verify = git_config_bool(key, val);
1373 else if (!strcmp("preformattedhtml", key))
1374 server.use_html = git_config_bool(key, val);
1375 else if (!val)
1376 return config_error_nonbool(key);
1377
1378 if (!strcmp("folder", key)) {
1379 imap_folder = xstrdup(val);
1380 } else if (!strcmp("host", key)) {
1381 if (!prefixcmp(val, "imap:"))
1382 val += 5;
1383 else if (!prefixcmp(val, "imaps:")) {
1384 val += 6;
1385 server.use_ssl = 1;
1386 }
1387 if (!prefixcmp(val, "//"))
1388 val += 2;
1389 server.host = xstrdup(val);
1390 } else if (!strcmp("user", key))
1391 server.user = xstrdup(val);
1392 else if (!strcmp("pass", key))
1393 server.pass = xstrdup(val);
1394 else if (!strcmp("port", key))
1395 server.port = git_config_int(key, val);
1396 else if (!strcmp("tunnel", key))
1397 server.tunnel = xstrdup(val);
1398 else if (!strcmp("authmethod", key))
1399 server.auth_method = xstrdup(val);
1400
1401 return 0;
1402 }
1403
1404 int main(int argc, char **argv)
1405 {
1406 struct strbuf all_msgs = STRBUF_INIT;
1407 struct strbuf msg = STRBUF_INIT;
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 git_setup_gettext();
1417
1418 if (argc != 1)
1419 usage(imap_send_usage);
1420
1421 setup_git_directory_gently(&nongit_ok);
1422 git_config(git_imap_config, NULL);
1423
1424 if (!server.port)
1425 server.port = server.use_ssl ? 993 : 143;
1426
1427 if (!imap_folder) {
1428 fprintf(stderr, "no imap store specified\n");
1429 return 1;
1430 }
1431 if (!server.host) {
1432 if (!server.tunnel) {
1433 fprintf(stderr, "no imap host specified\n");
1434 return 1;
1435 }
1436 server.host = "tunnel";
1437 }
1438
1439 /* read the messages */
1440 if (read_message(stdin, &all_msgs)) {
1441 fprintf(stderr, "error reading input\n");
1442 return 1;
1443 }
1444
1445 if (all_msgs.len == 0) {
1446 fprintf(stderr, "nothing to send\n");
1447 return 1;
1448 }
1449
1450 total = count_messages(&all_msgs);
1451 if (!total) {
1452 fprintf(stderr, "no messages to send\n");
1453 return 1;
1454 }
1455
1456 /* write it to the imap server */
1457 ctx = imap_open_store(&server);
1458 if (!ctx) {
1459 fprintf(stderr, "failed to open store\n");
1460 return 1;
1461 }
1462
1463 fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1464 ctx->name = imap_folder;
1465 while (1) {
1466 unsigned percent = n * 100 / total;
1467
1468 fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1469 if (!split_msg(&all_msgs, &msg, &ofs))
1470 break;
1471 if (server.use_html)
1472 wrap_in_html(&msg);
1473 r = imap_store_msg(ctx, &msg);
1474 if (r != DRV_OK)
1475 break;
1476 n++;
1477 }
1478 fprintf(stderr, "\n");
1479
1480 imap_close_store(ctx);
1481
1482 return 0;
1483 }
MinGW port of GIT