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imap-send.c: remove struct message
[git/debian.git] / imap-send.c
blob9e181e098cfb063d61c0d40a7637c2212ab433e8
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 char *path; /* own */
40 int uidvalidity;
41 unsigned char opts; /* maybe preset? */
42 /* note that the following do _not_ reflect stats from msgs, but mailbox totals */
43 int count; /* # of messages */
44 int recent; /* # of recent messages - don't trust this beyond the initial read */
45 };
46
47 static const char imap_send_usage[] = "git imap-send < <mbox>";
48
49 #undef DRV_OK
50 #define DRV_OK 0
51 #define DRV_MSG_BAD -1
52 #define DRV_BOX_BAD -2
53 #define DRV_STORE_BAD -3
54
55 static int Verbose, Quiet;
56
57 __attribute__((format (printf, 1, 2)))
58 static void imap_info(const char *, ...);
59 __attribute__((format (printf, 1, 2)))
60 static void imap_warn(const char *, ...);
61
62 static char *next_arg(char **);
63
64 __attribute__((format (printf, 3, 4)))
65 static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
66
67 static int nfvasprintf(char **strp, const char *fmt, va_list ap)
68 {
69 int len;
70 char tmp[8192];
71
72 len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
73 if (len < 0)
74 die("Fatal: Out of memory");
75 if (len >= sizeof(tmp))
76 die("imap command overflow!");
77 *strp = xmemdupz(tmp, len);
78 return len;
79 }
80
81 struct imap_server_conf {
82 char *name;
83 char *tunnel;
84 char *host;
85 int port;
86 char *user;
87 char *pass;
88 int use_ssl;
89 int ssl_verify;
90 int use_html;
91 char *auth_method;
92 };
93
94 static struct imap_server_conf server = {
95 NULL, /* name */
96 NULL, /* tunnel */
97 NULL, /* host */
98 0, /* port */
99 NULL, /* user */
100 NULL, /* pass */
101 0, /* use_ssl */
102 1, /* ssl_verify */
103 0, /* use_html */
104 NULL, /* auth_method */
105 };
106
107 #define NIL (void *)0x1
108 #define LIST (void *)0x2
109
110 struct imap_list {
111 struct imap_list *next, *child;
112 char *val;
113 int len;
114 };
115
116 struct imap_socket {
117 int fd[2];
118 SSL *ssl;
119 };
120
121 struct imap_buffer {
122 struct imap_socket sock;
123 int bytes;
124 int offset;
125 char buf[1024];
126 };
127
128 struct imap_cmd;
129
130 struct imap {
131 int uidnext; /* from SELECT responses */
132 struct imap_list *ns_personal, *ns_other, *ns_shared; /* NAMESPACE info */
133 unsigned caps, rcaps; /* CAPABILITY results */
134 /* command queue */
135 int nexttag, num_in_progress, literal_pending;
136 struct imap_cmd *in_progress, **in_progress_append;
137 struct imap_buffer buf; /* this is BIG, so put it last */
138 };
139
140 struct imap_store {
141 struct store gen;
142 int uidvalidity;
143 struct imap *imap;
144 const char *prefix;
145 unsigned /*currentnc:1,*/ trashnc:1;
146 };
147
148 struct imap_cmd_cb {
149 int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
150 void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
151 void *ctx;
152 char *data;
153 int dlen;
154 int uid;
155 unsigned create:1, trycreate:1;
156 };
157
158 struct imap_cmd {
159 struct imap_cmd *next;
160 struct imap_cmd_cb cb;
161 char *cmd;
162 int tag;
163 };
164
165 #define CAP(cap) (imap->caps & (1 << (cap)))
166
167 enum CAPABILITY {
168 NOLOGIN = 0,
169 UIDPLUS,
170 LITERALPLUS,
171 NAMESPACE,
172 STARTTLS,
173 AUTH_CRAM_MD5
174 };
175
176 static const char *cap_list[] = {
177 "LOGINDISABLED",
178 "UIDPLUS",
179 "LITERAL+",
180 "NAMESPACE",
181 "STARTTLS",
182 "AUTH=CRAM-MD5",
183 };
184
185 #define RESP_OK 0
186 #define RESP_NO 1
187 #define RESP_BAD 2
188
189 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
190
191
192 #ifndef NO_OPENSSL
193 static void ssl_socket_perror(const char *func)
194 {
195 fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
196 }
197 #endif
198
199 static void socket_perror(const char *func, struct imap_socket *sock, int ret)
200 {
201 #ifndef NO_OPENSSL
202 if (sock->ssl) {
203 int sslerr = SSL_get_error(sock->ssl, ret);
204 switch (sslerr) {
205 case SSL_ERROR_NONE:
206 break;
207 case SSL_ERROR_SYSCALL:
208 perror("SSL_connect");
209 break;
210 default:
211 ssl_socket_perror("SSL_connect");
212 break;
213 }
214 } else
215 #endif
216 {
217 if (ret < 0)
218 perror(func);
219 else
220 fprintf(stderr, "%s: unexpected EOF\n", func);
221 }
222 }
223
224 static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
225 {
226 #ifdef NO_OPENSSL
227 fprintf(stderr, "SSL requested but SSL support not compiled in\n");
228 return -1;
229 #else
230 #if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
231 const SSL_METHOD *meth;
232 #else
233 SSL_METHOD *meth;
234 #endif
235 SSL_CTX *ctx;
236 int ret;
237
238 SSL_library_init();
239 SSL_load_error_strings();
240
241 if (use_tls_only)
242 meth = TLSv1_method();
243 else
244 meth = SSLv23_method();
245
246 if (!meth) {
247 ssl_socket_perror("SSLv23_method");
248 return -1;
249 }
250
251 ctx = SSL_CTX_new(meth);
252
253 if (verify)
254 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
255
256 if (!SSL_CTX_set_default_verify_paths(ctx)) {
257 ssl_socket_perror("SSL_CTX_set_default_verify_paths");
258 return -1;
259 }
260 sock->ssl = SSL_new(ctx);
261 if (!sock->ssl) {
262 ssl_socket_perror("SSL_new");
263 return -1;
264 }
265 if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
266 ssl_socket_perror("SSL_set_rfd");
267 return -1;
268 }
269 if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
270 ssl_socket_perror("SSL_set_wfd");
271 return -1;
272 }
273
274 ret = SSL_connect(sock->ssl);
275 if (ret <= 0) {
276 socket_perror("SSL_connect", sock, ret);
277 return -1;
278 }
279
280 return 0;
281 #endif
282 }
283
284 static int socket_read(struct imap_socket *sock, char *buf, int len)
285 {
286 ssize_t n;
287 #ifndef NO_OPENSSL
288 if (sock->ssl)
289 n = SSL_read(sock->ssl, buf, len);
290 else
291 #endif
292 n = xread(sock->fd[0], buf, len);
293 if (n <= 0) {
294 socket_perror("read", sock, n);
295 close(sock->fd[0]);
296 close(sock->fd[1]);
297 sock->fd[0] = sock->fd[1] = -1;
298 }
299 return n;
300 }
301
302 static int socket_write(struct imap_socket *sock, const char *buf, int len)
303 {
304 int n;
305 #ifndef NO_OPENSSL
306 if (sock->ssl)
307 n = SSL_write(sock->ssl, buf, len);
308 else
309 #endif
310 n = write_in_full(sock->fd[1], buf, len);
311 if (n != len) {
312 socket_perror("write", sock, n);
313 close(sock->fd[0]);
314 close(sock->fd[1]);
315 sock->fd[0] = sock->fd[1] = -1;
316 }
317 return n;
318 }
319
320 static void socket_shutdown(struct imap_socket *sock)
321 {
322 #ifndef NO_OPENSSL
323 if (sock->ssl) {
324 SSL_shutdown(sock->ssl);
325 SSL_free(sock->ssl);
326 }
327 #endif
328 close(sock->fd[0]);
329 close(sock->fd[1]);
330 }
331
332 /* simple line buffering */
333 static int buffer_gets(struct imap_buffer *b, char **s)
334 {
335 int n;
336 int start = b->offset;
337
338 *s = b->buf + start;
339
340 for (;;) {
341 /* make sure we have enough data to read the \r\n sequence */
342 if (b->offset + 1 >= b->bytes) {
343 if (start) {
344 /* shift down used bytes */
345 *s = b->buf;
346
347 assert(start <= b->bytes);
348 n = b->bytes - start;
349
350 if (n)
351 memmove(b->buf, b->buf + start, n);
352 b->offset -= start;
353 b->bytes = n;
354 start = 0;
355 }
356
357 n = socket_read(&b->sock, b->buf + b->bytes,
358 sizeof(b->buf) - b->bytes);
359
360 if (n <= 0)
361 return -1;
362
363 b->bytes += n;
364 }
365
366 if (b->buf[b->offset] == '\r') {
367 assert(b->offset + 1 < b->bytes);
368 if (b->buf[b->offset + 1] == '\n') {
369 b->buf[b->offset] = 0; /* terminate the string */
370 b->offset += 2; /* next line */
371 if (Verbose)
372 puts(*s);
373 return 0;
374 }
375 }
376
377 b->offset++;
378 }
379 /* not reached */
380 }
381
382 static void imap_info(const char *msg, ...)
383 {
384 va_list va;
385
386 if (!Quiet) {
387 va_start(va, msg);
388 vprintf(msg, va);
389 va_end(va);
390 fflush(stdout);
391 }
392 }
393
394 static void imap_warn(const char *msg, ...)
395 {
396 va_list va;
397
398 if (Quiet < 2) {
399 va_start(va, msg);
400 vfprintf(stderr, msg, va);
401 va_end(va);
402 }
403 }
404
405 static char *next_arg(char **s)
406 {
407 char *ret;
408
409 if (!s || !*s)
410 return NULL;
411 while (isspace((unsigned char) **s))
412 (*s)++;
413 if (!**s) {
414 *s = NULL;
415 return NULL;
416 }
417 if (**s == '"') {
418 ++*s;
419 ret = *s;
420 *s = strchr(*s, '"');
421 } else {
422 ret = *s;
423 while (**s && !isspace((unsigned char) **s))
424 (*s)++;
425 }
426 if (*s) {
427 if (**s)
428 *(*s)++ = 0;
429 if (!**s)
430 *s = NULL;
431 }
432 return ret;
433 }
434
435 static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
436 {
437 int ret;
438 va_list va;
439
440 va_start(va, fmt);
441 if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
442 die("Fatal: buffer too small. Please report a bug.");
443 va_end(va);
444 return ret;
445 }
446
447 static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
448 struct imap_cmd_cb *cb,
449 const char *fmt, va_list ap)
450 {
451 struct imap *imap = ctx->imap;
452 struct imap_cmd *cmd;
453 int n, bufl;
454 char buf[1024];
455
456 cmd = xmalloc(sizeof(struct imap_cmd));
457 nfvasprintf(&cmd->cmd, fmt, ap);
458 cmd->tag = ++imap->nexttag;
459
460 if (cb)
461 cmd->cb = *cb;
462 else
463 memset(&cmd->cb, 0, sizeof(cmd->cb));
464
465 while (imap->literal_pending)
466 get_cmd_result(ctx, NULL);
467
468 if (!cmd->cb.data)
469 bufl = nfsnprintf(buf, sizeof(buf), "%d %s\r\n", cmd->tag, cmd->cmd);
470 else
471 bufl = nfsnprintf(buf, sizeof(buf), "%d %s{%d%s}\r\n",
472 cmd->tag, cmd->cmd, cmd->cb.dlen,
473 CAP(LITERALPLUS) ? "+" : "");
474
475 if (Verbose) {
476 if (imap->num_in_progress)
477 printf("(%d in progress) ", imap->num_in_progress);
478 if (memcmp(cmd->cmd, "LOGIN", 5))
479 printf(">>> %s", buf);
480 else
481 printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
482 }
483 if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
484 free(cmd->cmd);
485 free(cmd);
486 if (cb)
487 free(cb->data);
488 return NULL;
489 }
490 if (cmd->cb.data) {
491 if (CAP(LITERALPLUS)) {
492 n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
493 free(cmd->cb.data);
494 if (n != cmd->cb.dlen ||
495 socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
496 free(cmd->cmd);
497 free(cmd);
498 return NULL;
499 }
500 cmd->cb.data = NULL;
501 } else
502 imap->literal_pending = 1;
503 } else if (cmd->cb.cont)
504 imap->literal_pending = 1;
505 cmd->next = NULL;
506 *imap->in_progress_append = cmd;
507 imap->in_progress_append = &cmd->next;
508 imap->num_in_progress++;
509 return cmd;
510 }
511
512 __attribute__((format (printf, 3, 4)))
513 static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
514 struct imap_cmd_cb *cb,
515 const char *fmt, ...)
516 {
517 struct imap_cmd *ret;
518 va_list ap;
519
520 va_start(ap, fmt);
521 ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
522 va_end(ap);
523 return ret;
524 }
525
526 __attribute__((format (printf, 3, 4)))
527 static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
528 const char *fmt, ...)
529 {
530 va_list ap;
531 struct imap_cmd *cmdp;
532
533 va_start(ap, fmt);
534 cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
535 va_end(ap);
536 if (!cmdp)
537 return RESP_BAD;
538
539 return get_cmd_result(ctx, cmdp);
540 }
541
542 __attribute__((format (printf, 3, 4)))
543 static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
544 const char *fmt, ...)
545 {
546 va_list ap;
547 struct imap_cmd *cmdp;
548
549 va_start(ap, fmt);
550 cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
551 va_end(ap);
552 if (!cmdp)
553 return DRV_STORE_BAD;
554
555 switch (get_cmd_result(ctx, cmdp)) {
556 case RESP_BAD: return DRV_STORE_BAD;
557 case RESP_NO: return DRV_MSG_BAD;
558 default: return DRV_OK;
559 }
560 }
561
562 static int is_atom(struct imap_list *list)
563 {
564 return list && list->val && list->val != NIL && list->val != LIST;
565 }
566
567 static int is_list(struct imap_list *list)
568 {
569 return list && list->val == LIST;
570 }
571
572 static void free_list(struct imap_list *list)
573 {
574 struct imap_list *tmp;
575
576 for (; list; list = tmp) {
577 tmp = list->next;
578 if (is_list(list))
579 free_list(list->child);
580 else if (is_atom(list))
581 free(list->val);
582 free(list);
583 }
584 }
585
586 static int parse_imap_list_l(struct imap *imap, char **sp, struct imap_list **curp, int level)
587 {
588 struct imap_list *cur;
589 char *s = *sp, *p;
590 int n, bytes;
591
592 for (;;) {
593 while (isspace((unsigned char)*s))
594 s++;
595 if (level && *s == ')') {
596 s++;
597 break;
598 }
599 *curp = cur = xmalloc(sizeof(*cur));
600 curp = &cur->next;
601 cur->val = NULL; /* for clean bail */
602 if (*s == '(') {
603 /* sublist */
604 s++;
605 cur->val = LIST;
606 if (parse_imap_list_l(imap, &s, &cur->child, level + 1))
607 goto bail;
608 } else if (imap && *s == '{') {
609 /* literal */
610 bytes = cur->len = strtol(s + 1, &s, 10);
611 if (*s != '}')
612 goto bail;
613
614 s = cur->val = xmalloc(cur->len);
615
616 /* dump whats left over in the input buffer */
617 n = imap->buf.bytes - imap->buf.offset;
618
619 if (n > bytes)
620 /* the entire message fit in the buffer */
621 n = bytes;
622
623 memcpy(s, imap->buf.buf + imap->buf.offset, n);
624 s += n;
625 bytes -= n;
626
627 /* mark that we used part of the buffer */
628 imap->buf.offset += n;
629
630 /* now read the rest of the message */
631 while (bytes > 0) {
632 if ((n = socket_read(&imap->buf.sock, s, bytes)) <= 0)
633 goto bail;
634 s += n;
635 bytes -= n;
636 }
637
638 if (buffer_gets(&imap->buf, &s))
639 goto bail;
640 } else if (*s == '"') {
641 /* quoted string */
642 s++;
643 p = s;
644 for (; *s != '"'; s++)
645 if (!*s)
646 goto bail;
647 cur->len = s - p;
648 s++;
649 cur->val = xmemdupz(p, cur->len);
650 } else {
651 /* atom */
652 p = s;
653 for (; *s && !isspace((unsigned char)*s); s++)
654 if (level && *s == ')')
655 break;
656 cur->len = s - p;
657 if (cur->len == 3 && !memcmp("NIL", p, 3))
658 cur->val = NIL;
659 else
660 cur->val = xmemdupz(p, cur->len);
661 }
662
663 if (!level)
664 break;
665 if (!*s)
666 goto bail;
667 }
668 *sp = s;
669 *curp = NULL;
670 return 0;
671
672 bail:
673 *curp = NULL;
674 return -1;
675 }
676
677 static struct imap_list *parse_imap_list(struct imap *imap, char **sp)
678 {
679 struct imap_list *head;
680
681 if (!parse_imap_list_l(imap, sp, &head, 0))
682 return head;
683 free_list(head);
684 return NULL;
685 }
686
687 static struct imap_list *parse_list(char **sp)
688 {
689 return parse_imap_list(NULL, sp);
690 }
691
692 static void parse_capability(struct imap *imap, char *cmd)
693 {
694 char *arg;
695 unsigned i;
696
697 imap->caps = 0x80000000;
698 while ((arg = next_arg(&cmd)))
699 for (i = 0; i < ARRAY_SIZE(cap_list); i++)
700 if (!strcmp(cap_list[i], arg))
701 imap->caps |= 1 << i;
702 imap->rcaps = imap->caps;
703 }
704
705 static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
706 char *s)
707 {
708 struct imap *imap = ctx->imap;
709 char *arg, *p;
710
711 if (*s != '[')
712 return RESP_OK; /* no response code */
713 s++;
714 if (!(p = strchr(s, ']'))) {
715 fprintf(stderr, "IMAP error: malformed response code\n");
716 return RESP_BAD;
717 }
718 *p++ = 0;
719 arg = next_arg(&s);
720 if (!strcmp("UIDVALIDITY", arg)) {
721 if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg))) {
722 fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
723 return RESP_BAD;
724 }
725 } else if (!strcmp("UIDNEXT", arg)) {
726 if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
727 fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
728 return RESP_BAD;
729 }
730 } else if (!strcmp("CAPABILITY", arg)) {
731 parse_capability(imap, s);
732 } else if (!strcmp("ALERT", arg)) {
733 /* RFC2060 says that these messages MUST be displayed
734 * to the user
735 */
736 for (; isspace((unsigned char)*p); p++);
737 fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
738 } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
739 if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg)) ||
740 !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
741 fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
742 return RESP_BAD;
743 }
744 }
745 return RESP_OK;
746 }
747
748 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
749 {
750 struct imap *imap = ctx->imap;
751 struct imap_cmd *cmdp, **pcmdp, *ncmdp;
752 char *cmd, *arg, *arg1, *p;
753 int n, resp, resp2, tag;
754
755 for (;;) {
756 if (buffer_gets(&imap->buf, &cmd))
757 return RESP_BAD;
758
759 arg = next_arg(&cmd);
760 if (*arg == '*') {
761 arg = next_arg(&cmd);
762 if (!arg) {
763 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
764 return RESP_BAD;
765 }
766
767 if (!strcmp("NAMESPACE", arg)) {
768 imap->ns_personal = parse_list(&cmd);
769 imap->ns_other = parse_list(&cmd);
770 imap->ns_shared = parse_list(&cmd);
771 } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
772 !strcmp("NO", arg) || !strcmp("BYE", arg)) {
773 if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
774 return resp;
775 } else if (!strcmp("CAPABILITY", arg))
776 parse_capability(imap, cmd);
777 else if ((arg1 = next_arg(&cmd))) {
778 if (!strcmp("EXISTS", arg1))
779 ctx->gen.count = atoi(arg);
780 else if (!strcmp("RECENT", arg1))
781 ctx->gen.recent = atoi(arg);
782 } else {
783 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
784 return RESP_BAD;
785 }
786 } else if (!imap->in_progress) {
787 fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
788 return RESP_BAD;
789 } else if (*arg == '+') {
790 /* This can happen only with the last command underway, as
791 it enforces a round-trip. */
792 cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
793 offsetof(struct imap_cmd, next));
794 if (cmdp->cb.data) {
795 n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
796 free(cmdp->cb.data);
797 cmdp->cb.data = NULL;
798 if (n != (int)cmdp->cb.dlen)
799 return RESP_BAD;
800 } else if (cmdp->cb.cont) {
801 if (cmdp->cb.cont(ctx, cmdp, cmd))
802 return RESP_BAD;
803 } else {
804 fprintf(stderr, "IMAP error: unexpected command continuation request\n");
805 return RESP_BAD;
806 }
807 if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
808 return RESP_BAD;
809 if (!cmdp->cb.cont)
810 imap->literal_pending = 0;
811 if (!tcmd)
812 return DRV_OK;
813 } else {
814 tag = atoi(arg);
815 for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
816 if (cmdp->tag == tag)
817 goto gottag;
818 fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
819 return RESP_BAD;
820 gottag:
821 if (!(*pcmdp = cmdp->next))
822 imap->in_progress_append = pcmdp;
823 imap->num_in_progress--;
824 if (cmdp->cb.cont || cmdp->cb.data)
825 imap->literal_pending = 0;
826 arg = next_arg(&cmd);
827 if (!strcmp("OK", arg))
828 resp = DRV_OK;
829 else {
830 if (!strcmp("NO", arg)) {
831 if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
832 p = strchr(cmdp->cmd, '"');
833 if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", (int)(strchr(p + 1, '"') - p + 1), p)) {
834 resp = RESP_BAD;
835 goto normal;
836 }
837 /* not waiting here violates the spec, but a server that does not
838 grok this nonetheless violates it too. */
839 cmdp->cb.create = 0;
840 if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
841 resp = RESP_BAD;
842 goto normal;
843 }
844 free(cmdp->cmd);
845 free(cmdp);
846 if (!tcmd)
847 return 0; /* ignored */
848 if (cmdp == tcmd)
849 tcmd = ncmdp;
850 continue;
851 }
852 resp = RESP_NO;
853 } else /*if (!strcmp("BAD", arg))*/
854 resp = RESP_BAD;
855 fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
856 memcmp(cmdp->cmd, "LOGIN", 5) ?
857 cmdp->cmd : "LOGIN <user> <pass>",
858 arg, cmd ? cmd : "");
859 }
860 if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
861 resp = resp2;
862 normal:
863 if (cmdp->cb.done)
864 cmdp->cb.done(ctx, cmdp, resp);
865 free(cmdp->cb.data);
866 free(cmdp->cmd);
867 free(cmdp);
868 if (!tcmd || tcmd == cmdp)
869 return resp;
870 }
871 }
872 /* not reached */
873 }
874
875 static void imap_close_server(struct imap_store *ictx)
876 {
877 struct imap *imap = ictx->imap;
878
879 if (imap->buf.sock.fd[0] != -1) {
880 imap_exec(ictx, NULL, "LOGOUT");
881 socket_shutdown(&imap->buf.sock);
882 }
883 free_list(imap->ns_personal);
884 free_list(imap->ns_other);
885 free_list(imap->ns_shared);
886 free(imap);
887 }
888
889 static void imap_close_store(struct store *ctx)
890 {
891 imap_close_server((struct imap_store *)ctx);
892 free(ctx);
893 }
894
895 #ifndef NO_OPENSSL
896
897 /*
898 * hexchar() and cram() functions are based on the code from the isync
899 * project (http://isync.sf.net/).
900 */
901 static char hexchar(unsigned int b)
902 {
903 return b < 10 ? '0' + b : 'a' + (b - 10);
904 }
905
906 #define ENCODED_SIZE(n) (4*((n+2)/3))
907 static char *cram(const char *challenge_64, const char *user, const char *pass)
908 {
909 int i, resp_len, encoded_len, decoded_len;
910 HMAC_CTX hmac;
911 unsigned char hash[16];
912 char hex[33];
913 char *response, *response_64, *challenge;
914
915 /*
916 * length of challenge_64 (i.e. base-64 encoded string) is a good
917 * enough upper bound for challenge (decoded result).
918 */
919 encoded_len = strlen(challenge_64);
920 challenge = xmalloc(encoded_len);
921 decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
922 (unsigned char *)challenge_64, encoded_len);
923 if (decoded_len < 0)
924 die("invalid challenge %s", challenge_64);
925 HMAC_Init(&hmac, (unsigned char *)pass, strlen(pass), EVP_md5());
926 HMAC_Update(&hmac, (unsigned char *)challenge, decoded_len);
927 HMAC_Final(&hmac, hash, NULL);
928 HMAC_CTX_cleanup(&hmac);
929
930 hex[32] = 0;
931 for (i = 0; i < 16; i++) {
932 hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
933 hex[2 * i + 1] = hexchar(hash[i] & 0xf);
934 }
935
936 /* response: "<user> <digest in hex>" */
937 resp_len = strlen(user) + 1 + strlen(hex) + 1;
938 response = xmalloc(resp_len);
939 sprintf(response, "%s %s", user, hex);
940
941 response_64 = xmalloc(ENCODED_SIZE(resp_len) + 1);
942 encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
943 (unsigned char *)response, resp_len);
944 if (encoded_len < 0)
945 die("EVP_EncodeBlock error");
946 response_64[encoded_len] = '\0';
947 return (char *)response_64;
948 }
949
950 #else
951
952 static char *cram(const char *challenge_64, const char *user, const char *pass)
953 {
954 die("If you want to use CRAM-MD5 authenticate method, "
955 "you have to build git-imap-send with OpenSSL library.");
956 }
957
958 #endif
959
960 static int auth_cram_md5(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt)
961 {
962 int ret;
963 char *response;
964
965 response = cram(prompt, server.user, server.pass);
966
967 ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
968 if (ret != strlen(response))
969 return error("IMAP error: sending response failed");
970
971 free(response);
972
973 return 0;
974 }
975
976 static struct store *imap_open_store(struct imap_server_conf *srvc)
977 {
978 struct imap_store *ctx;
979 struct imap *imap;
980 char *arg, *rsp;
981 int s = -1, preauth;
982
983 ctx = xcalloc(sizeof(*ctx), 1);
984
985 ctx->imap = imap = xcalloc(sizeof(*imap), 1);
986 imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
987 imap->in_progress_append = &imap->in_progress;
988
989 /* open connection to IMAP server */
990
991 if (srvc->tunnel) {
992 const char *argv[] = { srvc->tunnel, NULL };
993 struct child_process tunnel = {NULL};
994
995 imap_info("Starting tunnel '%s'... ", srvc->tunnel);
996
997 tunnel.argv = argv;
998 tunnel.use_shell = 1;
999 tunnel.in = -1;
1000 tunnel.out = -1;
1001 if (start_command(&tunnel))
1002 die("cannot start proxy %s", argv[0]);
1003
1004 imap->buf.sock.fd[0] = tunnel.out;
1005 imap->buf.sock.fd[1] = tunnel.in;
1006
1007 imap_info("ok\n");
1008 } else {
1009 #ifndef NO_IPV6
1010 struct addrinfo hints, *ai0, *ai;
1011 int gai;
1012 char portstr[6];
1013
1014 snprintf(portstr, sizeof(portstr), "%d", srvc->port);
1015
1016 memset(&hints, 0, sizeof(hints));
1017 hints.ai_socktype = SOCK_STREAM;
1018 hints.ai_protocol = IPPROTO_TCP;
1019
1020 imap_info("Resolving %s... ", srvc->host);
1021 gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
1022 if (gai) {
1023 fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
1024 goto bail;
1025 }
1026 imap_info("ok\n");
1027
1028 for (ai0 = ai; ai; ai = ai->ai_next) {
1029 char addr[NI_MAXHOST];
1030
1031 s = socket(ai->ai_family, ai->ai_socktype,
1032 ai->ai_protocol);
1033 if (s < 0)
1034 continue;
1035
1036 getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1037 sizeof(addr), NULL, 0, NI_NUMERICHOST);
1038 imap_info("Connecting to [%s]:%s... ", addr, portstr);
1039
1040 if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1041 close(s);
1042 s = -1;
1043 perror("connect");
1044 continue;
1045 }
1046
1047 break;
1048 }
1049 freeaddrinfo(ai0);
1050 #else /* NO_IPV6 */
1051 struct hostent *he;
1052 struct sockaddr_in addr;
1053
1054 memset(&addr, 0, sizeof(addr));
1055 addr.sin_port = htons(srvc->port);
1056 addr.sin_family = AF_INET;
1057
1058 imap_info("Resolving %s... ", srvc->host);
1059 he = gethostbyname(srvc->host);
1060 if (!he) {
1061 perror("gethostbyname");
1062 goto bail;
1063 }
1064 imap_info("ok\n");
1065
1066 addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1067
1068 s = socket(PF_INET, SOCK_STREAM, 0);
1069
1070 imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1071 if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1072 close(s);
1073 s = -1;
1074 perror("connect");
1075 }
1076 #endif
1077 if (s < 0) {
1078 fputs("Error: unable to connect to server.\n", stderr);
1079 goto bail;
1080 }
1081
1082 imap->buf.sock.fd[0] = s;
1083 imap->buf.sock.fd[1] = dup(s);
1084
1085 if (srvc->use_ssl &&
1086 ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1087 close(s);
1088 goto bail;
1089 }
1090 imap_info("ok\n");
1091 }
1092
1093 /* read the greeting string */
1094 if (buffer_gets(&imap->buf, &rsp)) {
1095 fprintf(stderr, "IMAP error: no greeting response\n");
1096 goto bail;
1097 }
1098 arg = next_arg(&rsp);
1099 if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1100 fprintf(stderr, "IMAP error: invalid greeting response\n");
1101 goto bail;
1102 }
1103 preauth = 0;
1104 if (!strcmp("PREAUTH", arg))
1105 preauth = 1;
1106 else if (strcmp("OK", arg) != 0) {
1107 fprintf(stderr, "IMAP error: unknown greeting response\n");
1108 goto bail;
1109 }
1110 parse_response_code(ctx, NULL, rsp);
1111 if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1112 goto bail;
1113
1114 if (!preauth) {
1115 #ifndef NO_OPENSSL
1116 if (!srvc->use_ssl && CAP(STARTTLS)) {
1117 if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK)
1118 goto bail;
1119 if (ssl_socket_connect(&imap->buf.sock, 1,
1120 srvc->ssl_verify))
1121 goto bail;
1122 /* capabilities may have changed, so get the new capabilities */
1123 if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1124 goto bail;
1125 }
1126 #endif
1127 imap_info("Logging in...\n");
1128 if (!srvc->user) {
1129 fprintf(stderr, "Skipping server %s, no user\n", srvc->host);
1130 goto bail;
1131 }
1132 if (!srvc->pass) {
1133 struct strbuf prompt = STRBUF_INIT;
1134 strbuf_addf(&prompt, "Password (%s@%s): ", srvc->user, srvc->host);
1135 arg = git_getpass(prompt.buf);
1136 strbuf_release(&prompt);
1137 if (!*arg) {
1138 fprintf(stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host);
1139 goto bail;
1140 }
1141 /*
1142 * getpass() returns a pointer to a static buffer. make a copy
1143 * for long term storage.
1144 */
1145 srvc->pass = xstrdup(arg);
1146 }
1147 if (CAP(NOLOGIN)) {
1148 fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1149 goto bail;
1150 }
1151
1152 if (srvc->auth_method) {
1153 struct imap_cmd_cb cb;
1154
1155 if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1156 if (!CAP(AUTH_CRAM_MD5)) {
1157 fprintf(stderr, "You specified"
1158 "CRAM-MD5 as authentication method, "
1159 "but %s doesn't support it.\n", srvc->host);
1160 goto bail;
1161 }
1162 /* CRAM-MD5 */
1163
1164 memset(&cb, 0, sizeof(cb));
1165 cb.cont = auth_cram_md5;
1166 if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1167 fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1168 goto bail;
1169 }
1170 } else {
1171 fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1172 goto bail;
1173 }
1174 } else {
1175 if (!imap->buf.sock.ssl)
1176 imap_warn("*** IMAP Warning *** Password is being "
1177 "sent in the clear\n");
1178 if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1179 fprintf(stderr, "IMAP error: LOGIN failed\n");
1180 goto bail;
1181 }
1182 }
1183 } /* !preauth */
1184
1185 ctx->prefix = "";
1186 ctx->trashnc = 1;
1187 return (struct store *)ctx;
1188
1189 bail:
1190 imap_close_store(&ctx->gen);
1191 return NULL;
1192 }
1193
1194 static void lf_to_crlf(struct strbuf *msg)
1195 {
1196 size_t new_len;
1197 char *new;
1198 int i, j, lfnum = 0;
1199
1200 if (msg->buf[0] == '\n')
1201 lfnum++;
1202 for (i = 1; i < msg->len; i++) {
1203 if (msg->buf[i - 1] != '\r' && msg->buf[i] == '\n')
1204 lfnum++;
1205 }
1206
1207 new_len = msg->len + lfnum;
1208 new = xmalloc(new_len + 1);
1209 if (msg->buf[0] == '\n') {
1210 new[0] = '\r';
1211 new[1] = '\n';
1212 i = 1;
1213 j = 2;
1214 } else {
1215 new[0] = msg->buf[0];
1216 i = 1;
1217 j = 1;
1218 }
1219 for ( ; i < msg->len; i++) {
1220 if (msg->buf[i] != '\n') {
1221 new[j++] = msg->buf[i];
1222 continue;
1223 }
1224 if (msg->buf[i - 1] != '\r')
1225 new[j++] = '\r';
1226 /* otherwise it already had CR before */
1227 new[j++] = '\n';
1228 }
1229 strbuf_attach(msg, new, new_len, new_len + 1);
1230 }
1231
1232 /*
1233 * Store msg to IMAP. Also detach and free the data from msg->data,
1234 * leaving msg->data empty.
1235 */
1236 static int imap_store_msg(struct store *gctx, struct strbuf *msg)
1237 {
1238 struct imap_store *ctx = (struct imap_store *)gctx;
1239 struct imap *imap = ctx->imap;
1240 struct imap_cmd_cb cb;
1241 const char *prefix, *box;
1242 int ret;
1243
1244 lf_to_crlf(msg);
1245 memset(&cb, 0, sizeof(cb));
1246
1247 cb.dlen = msg->len;
1248 cb.data = strbuf_detach(msg, NULL);
1249
1250 box = gctx->name;
1251 prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1252 cb.create = 0;
1253 ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" ", prefix, box);
1254 imap->caps = imap->rcaps;
1255 if (ret != DRV_OK)
1256 return ret;
1257 gctx->count++;
1258
1259 return DRV_OK;
1260 }
1261
1262 static void wrap_in_html(struct strbuf *msg)
1263 {
1264 struct strbuf buf = STRBUF_INIT;
1265 static char *content_type = "Content-Type: text/html;\n";
1266 static char *pre_open = "<pre>\n";
1267 static char *pre_close = "</pre>\n";
1268 const char *body = strstr(msg->buf, "\n\n");
1269
1270 if (!body)
1271 return; /* Headers but no body; no wrapping needed */
1272
1273 body += 2;
1274
1275 strbuf_add(&buf, msg->buf, body - msg->buf - 1);
1276 strbuf_addstr(&buf, content_type);
1277 strbuf_addch(&buf, '\n');
1278 strbuf_addstr(&buf, pre_open);
1279 strbuf_addstr_xml_quoted(&buf, body);
1280 strbuf_addstr(&buf, pre_close);
1281
1282 strbuf_release(msg);
1283 *msg = buf;
1284 }
1285
1286 #define CHUNKSIZE 0x1000
1287
1288 static int read_message(FILE *f, struct strbuf *all_msgs)
1289 {
1290 do {
1291 if (strbuf_fread(all_msgs, CHUNKSIZE, f) <= 0)
1292 break;
1293 } while (!feof(f));
1294
1295 return ferror(f) ? -1 : 0;
1296 }
1297
1298 static int count_messages(struct strbuf *all_msgs)
1299 {
1300 int count = 0;
1301 char *p = all_msgs->buf;
1302
1303 while (1) {
1304 if (!prefixcmp(p, "From ")) {
1305 p = strstr(p+5, "\nFrom: ");
1306 if (!p) break;
1307 p = strstr(p+7, "\nDate: ");
1308 if (!p) break;
1309 p = strstr(p+7, "\nSubject: ");
1310 if (!p) break;
1311 p += 10;
1312 count++;
1313 }
1314 p = strstr(p+5, "\nFrom ");
1315 if (!p)
1316 break;
1317 p++;
1318 }
1319 return count;
1320 }
1321
1322 /*
1323 * Copy the next message from all_msgs, starting at offset *ofs, to
1324 * msg. Update *ofs to the start of the following message. Return
1325 * true iff a message was successfully copied.
1326 */
1327 static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs)
1328 {
1329 char *p, *data;
1330 size_t len;
1331
1332 if (*ofs >= all_msgs->len)
1333 return 0;
1334
1335 data = &all_msgs->buf[*ofs];
1336 len = all_msgs->len - *ofs;
1337
1338 if (len < 5 || prefixcmp(data, "From "))
1339 return 0;
1340
1341 p = strchr(data, '\n');
1342 if (p) {
1343 p++;
1344 len -= p - data;
1345 *ofs += p - data;
1346 data = p;
1347 }
1348
1349 p = strstr(data, "\nFrom ");
1350 if (p)
1351 len = &p[1] - data;
1352
1353 strbuf_add(msg, data, len);
1354 *ofs += len;
1355 return 1;
1356 }
1357
1358 static char *imap_folder;
1359
1360 static int git_imap_config(const char *key, const char *val, void *cb)
1361 {
1362 char imap_key[] = "imap.";
1363
1364 if (strncmp(key, imap_key, sizeof imap_key - 1))
1365 return 0;
1366
1367 key += sizeof imap_key - 1;
1368
1369 /* check booleans first, and barf on others */
1370 if (!strcmp("sslverify", key))
1371 server.ssl_verify = git_config_bool(key, val);
1372 else if (!strcmp("preformattedhtml", key))
1373 server.use_html = git_config_bool(key, val);
1374 else if (!val)
1375 return config_error_nonbool(key);
1376
1377 if (!strcmp("folder", key)) {
1378 imap_folder = xstrdup(val);
1379 } else if (!strcmp("host", key)) {
1380 if (!prefixcmp(val, "imap:"))
1381 val += 5;
1382 else if (!prefixcmp(val, "imaps:")) {
1383 val += 6;
1384 server.use_ssl = 1;
1385 }
1386 if (!prefixcmp(val, "//"))
1387 val += 2;
1388 server.host = xstrdup(val);
1389 } else if (!strcmp("user", key))
1390 server.user = xstrdup(val);
1391 else if (!strcmp("pass", key))
1392 server.pass = xstrdup(val);
1393 else if (!strcmp("port", key))
1394 server.port = git_config_int(key, val);
1395 else if (!strcmp("tunnel", key))
1396 server.tunnel = xstrdup(val);
1397 else if (!strcmp("authmethod", key))
1398 server.auth_method = xstrdup(val);
1399
1400 return 0;
1401 }
1402
1403 int main(int argc, char **argv)
1404 {
1405 struct strbuf all_msgs = STRBUF_INIT;
1406 struct strbuf msg = STRBUF_INIT;
1407 struct store *ctx = NULL;
1408 int ofs = 0;
1409 int r;
1410 int total, n = 0;
1411 int nongit_ok;
1412
1413 git_extract_argv0_path(argv[0]);
1414
1415 git_setup_gettext();
1416
1417 if (argc != 1)
1418 usage(imap_send_usage);
1419
1420 setup_git_directory_gently(&nongit_ok);
1421 git_config(git_imap_config, NULL);
1422
1423 if (!server.port)
1424 server.port = server.use_ssl ? 993 : 143;
1425
1426 if (!imap_folder) {
1427 fprintf(stderr, "no imap store specified\n");
1428 return 1;
1429 }
1430 if (!server.host) {
1431 if (!server.tunnel) {
1432 fprintf(stderr, "no imap host specified\n");
1433 return 1;
1434 }
1435 server.host = "tunnel";
1436 }
1437
1438 /* read the messages */
1439 if (read_message(stdin, &all_msgs)) {
1440 fprintf(stderr, "error reading input\n");
1441 return 1;
1442 }
1443
1444 if (all_msgs.len == 0) {
1445 fprintf(stderr, "nothing to send\n");
1446 return 1;
1447 }
1448
1449 total = count_messages(&all_msgs);
1450 if (!total) {
1451 fprintf(stderr, "no messages to send\n");
1452 return 1;
1453 }
1454
1455 /* write it to the imap server */
1456 ctx = imap_open_store(&server);
1457 if (!ctx) {
1458 fprintf(stderr, "failed to open store\n");
1459 return 1;
1460 }
1461
1462 fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1463 ctx->name = imap_folder;
1464 while (1) {
1465 unsigned percent = n * 100 / total;
1466
1467 fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1468 if (!split_msg(&all_msgs, &msg, &ofs))
1469 break;
1470 if (server.use_html)
1471 wrap_in_html(&msg);
1472 r = imap_store_msg(ctx, &msg);
1473 if (r != DRV_OK)
1474 break;
1475 n++;
1476 }
1477 fprintf(stderr, "\n");
1478
1479 imap_close_store(ctx);
1480
1481 return 0;
1482 }
git for Debian