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strbuf: simplify comment-handling in add_lines() helper
[alt-git.git] / imap-send.c
blobf2e1947e63815c80e45f648f0ce37cd6341f825b
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, see <https://www.gnu.org/licenses/>.
22 */
23
24 #include "git-compat-util.h"
25 #include "config.h"
26 #include "credential.h"
27 #include "gettext.h"
28 #include "run-command.h"
29 #include "parse-options.h"
30 #include "setup.h"
31 #include "strbuf.h"
32 #if defined(NO_OPENSSL) && !defined(HAVE_OPENSSL_CSPRNG)
33 typedef void *SSL;
34 #endif
35 #ifdef USE_CURL_FOR_IMAP_SEND
36 #include "http.h"
37 #endif
38
39 #if defined(USE_CURL_FOR_IMAP_SEND)
40 /* Always default to curl if it's available. */
41 #define USE_CURL_DEFAULT 1
42 #else
43 /* We don't have curl, so continue to use the historical implementation */
44 #define USE_CURL_DEFAULT 0
45 #endif
46
47 static int verbosity;
48 static int use_curl = USE_CURL_DEFAULT;
49
50 static const char * const imap_send_usage[] = { "git imap-send [-v] [-q] [--[no-]curl] < <mbox>", NULL };
51
52 static struct option imap_send_options[] = {
53 OPT__VERBOSITY(&verbosity),
54 OPT_BOOL(0, "curl", &use_curl, "use libcurl to communicate with the IMAP server"),
55 OPT_END()
56 };
57
58 #undef DRV_OK
59 #define DRV_OK 0
60 #define DRV_MSG_BAD -1
61 #define DRV_BOX_BAD -2
62 #define DRV_STORE_BAD -3
63
64 __attribute__((format (printf, 1, 2)))
65 static void imap_info(const char *, ...);
66 __attribute__((format (printf, 1, 2)))
67 static void imap_warn(const char *, ...);
68
69 static char *next_arg(char **);
70
71 __attribute__((format (printf, 3, 4)))
72 static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
73
74 static int nfvasprintf(char **strp, const char *fmt, va_list ap)
75 {
76 int len;
77 char tmp[8192];
78
79 len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
80 if (len < 0)
81 die("Fatal: Out of memory");
82 if (len >= sizeof(tmp))
83 die("imap command overflow!");
84 *strp = xmemdupz(tmp, len);
85 return len;
86 }
87
88 struct imap_server_conf {
89 const char *name;
90 const char *tunnel;
91 const char *host;
92 int port;
93 const char *folder;
94 const char *user;
95 const char *pass;
96 int use_ssl;
97 int ssl_verify;
98 int use_html;
99 const char *auth_method;
100 };
101
102 static struct imap_server_conf server = {
103 .ssl_verify = 1,
104 };
105
106 struct imap_socket {
107 int fd[2];
108 SSL *ssl;
109 };
110
111 struct imap_buffer {
112 struct imap_socket sock;
113 int bytes;
114 int offset;
115 char buf[1024];
116 };
117
118 struct imap_cmd;
119
120 struct imap {
121 int uidnext; /* from SELECT responses */
122 unsigned caps, rcaps; /* CAPABILITY results */
123 /* command queue */
124 int nexttag, num_in_progress, literal_pending;
125 struct imap_cmd *in_progress, **in_progress_append;
126 struct imap_buffer buf; /* this is BIG, so put it last */
127 };
128
129 struct imap_store {
130 /* currently open mailbox */
131 const char *name; /* foreign! maybe preset? */
132 int uidvalidity;
133 struct imap *imap;
134 const char *prefix;
135 };
136
137 struct imap_cmd_cb {
138 int (*cont)(struct imap_store *ctx, const char *prompt);
139 void *ctx;
140 char *data;
141 int dlen;
142 };
143
144 struct imap_cmd {
145 struct imap_cmd *next;
146 struct imap_cmd_cb cb;
147 char *cmd;
148 int tag;
149 };
150
151 #define CAP(cap) (imap->caps & (1 << (cap)))
152
153 enum CAPABILITY {
154 NOLOGIN = 0,
155 UIDPLUS,
156 LITERALPLUS,
157 NAMESPACE,
158 STARTTLS,
159 AUTH_CRAM_MD5
160 };
161
162 static const char *cap_list[] = {
163 "LOGINDISABLED",
164 "UIDPLUS",
165 "LITERAL+",
166 "NAMESPACE",
167 "STARTTLS",
168 "AUTH=CRAM-MD5",
169 };
170
171 #define RESP_OK 0
172 #define RESP_NO 1
173 #define RESP_BAD 2
174
175 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
176
177
178 #ifndef NO_OPENSSL
179 static void ssl_socket_perror(const char *func)
180 {
181 fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
182 }
183 #endif
184
185 static void socket_perror(const char *func, struct imap_socket *sock, int ret)
186 {
187 #ifndef NO_OPENSSL
188 if (sock->ssl) {
189 int sslerr = SSL_get_error(sock->ssl, ret);
190 switch (sslerr) {
191 case SSL_ERROR_NONE:
192 break;
193 case SSL_ERROR_SYSCALL:
194 perror("SSL_connect");
195 break;
196 default:
197 ssl_socket_perror("SSL_connect");
198 break;
199 }
200 } else
201 #endif
202 {
203 if (ret < 0)
204 perror(func);
205 else
206 fprintf(stderr, "%s: unexpected EOF\n", func);
207 }
208 /* mark as used to appease -Wunused-parameter with NO_OPENSSL */
209 (void)sock;
210 }
211
212 #ifdef NO_OPENSSL
213 static int ssl_socket_connect(struct imap_socket *sock UNUSED,
214 int use_tls_only UNUSED,
215 int verify UNUSED)
216 {
217 fprintf(stderr, "SSL requested but SSL support not compiled in\n");
218 return -1;
219 }
220
221 #else
222
223 static int host_matches(const char *host, const char *pattern)
224 {
225 if (pattern[0] == '*' && pattern[1] == '.') {
226 pattern += 2;
227 if (!(host = strchr(host, '.')))
228 return 0;
229 host++;
230 }
231
232 return *host && *pattern && !strcasecmp(host, pattern);
233 }
234
235 static int verify_hostname(X509 *cert, const char *hostname)
236 {
237 int len;
238 X509_NAME *subj;
239 char cname[1000];
240 int i, found;
241 STACK_OF(GENERAL_NAME) *subj_alt_names;
242
243 /* try the DNS subjectAltNames */
244 found = 0;
245 if ((subj_alt_names = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL))) {
246 int num_subj_alt_names = sk_GENERAL_NAME_num(subj_alt_names);
247 for (i = 0; !found && i < num_subj_alt_names; i++) {
248 GENERAL_NAME *subj_alt_name = sk_GENERAL_NAME_value(subj_alt_names, i);
249 if (subj_alt_name->type == GEN_DNS &&
250 strlen((const char *)subj_alt_name->d.ia5->data) == (size_t)subj_alt_name->d.ia5->length &&
251 host_matches(hostname, (const char *)(subj_alt_name->d.ia5->data)))
252 found = 1;
253 }
254 sk_GENERAL_NAME_pop_free(subj_alt_names, GENERAL_NAME_free);
255 }
256 if (found)
257 return 0;
258
259 /* try the common name */
260 if (!(subj = X509_get_subject_name(cert)))
261 return error("cannot get certificate subject");
262 if ((len = X509_NAME_get_text_by_NID(subj, NID_commonName, cname, sizeof(cname))) < 0)
263 return error("cannot get certificate common name");
264 if (strlen(cname) == (size_t)len && host_matches(hostname, cname))
265 return 0;
266 return error("certificate owner '%s' does not match hostname '%s'",
267 cname, hostname);
268 }
269
270 static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
271 {
272 #if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
273 const SSL_METHOD *meth;
274 #else
275 SSL_METHOD *meth;
276 #endif
277 SSL_CTX *ctx;
278 int ret;
279 X509 *cert;
280
281 SSL_library_init();
282 SSL_load_error_strings();
283
284 meth = SSLv23_method();
285 if (!meth) {
286 ssl_socket_perror("SSLv23_method");
287 return -1;
288 }
289
290 ctx = SSL_CTX_new(meth);
291 if (!ctx) {
292 ssl_socket_perror("SSL_CTX_new");
293 return -1;
294 }
295
296 if (use_tls_only)
297 SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3);
298
299 if (verify)
300 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
301
302 if (!SSL_CTX_set_default_verify_paths(ctx)) {
303 ssl_socket_perror("SSL_CTX_set_default_verify_paths");
304 return -1;
305 }
306 sock->ssl = SSL_new(ctx);
307 if (!sock->ssl) {
308 ssl_socket_perror("SSL_new");
309 return -1;
310 }
311 if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
312 ssl_socket_perror("SSL_set_rfd");
313 return -1;
314 }
315 if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
316 ssl_socket_perror("SSL_set_wfd");
317 return -1;
318 }
319
320 #ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
321 /*
322 * SNI (RFC4366)
323 * OpenSSL does not document this function, but the implementation
324 * returns 1 on success, 0 on failure after calling SSLerr().
325 */
326 ret = SSL_set_tlsext_host_name(sock->ssl, server.host);
327 if (ret != 1)
328 warning("SSL_set_tlsext_host_name(%s) failed.", server.host);
329 #endif
330
331 ret = SSL_connect(sock->ssl);
332 if (ret <= 0) {
333 socket_perror("SSL_connect", sock, ret);
334 return -1;
335 }
336
337 if (verify) {
338 /* make sure the hostname matches that of the certificate */
339 cert = SSL_get_peer_certificate(sock->ssl);
340 if (!cert)
341 return error("unable to get peer certificate.");
342 if (verify_hostname(cert, server.host) < 0)
343 return -1;
344 }
345
346 return 0;
347 }
348 #endif
349
350 static int socket_read(struct imap_socket *sock, char *buf, int len)
351 {
352 ssize_t n;
353 #ifndef NO_OPENSSL
354 if (sock->ssl)
355 n = SSL_read(sock->ssl, buf, len);
356 else
357 #endif
358 n = xread(sock->fd[0], buf, len);
359 if (n <= 0) {
360 socket_perror("read", sock, n);
361 close(sock->fd[0]);
362 close(sock->fd[1]);
363 sock->fd[0] = sock->fd[1] = -1;
364 }
365 return n;
366 }
367
368 static int socket_write(struct imap_socket *sock, const char *buf, int len)
369 {
370 int n;
371 #ifndef NO_OPENSSL
372 if (sock->ssl)
373 n = SSL_write(sock->ssl, buf, len);
374 else
375 #endif
376 n = write_in_full(sock->fd[1], buf, len);
377 if (n != len) {
378 socket_perror("write", sock, n);
379 close(sock->fd[0]);
380 close(sock->fd[1]);
381 sock->fd[0] = sock->fd[1] = -1;
382 }
383 return n;
384 }
385
386 static void socket_shutdown(struct imap_socket *sock)
387 {
388 #ifndef NO_OPENSSL
389 if (sock->ssl) {
390 SSL_shutdown(sock->ssl);
391 SSL_free(sock->ssl);
392 }
393 #endif
394 close(sock->fd[0]);
395 close(sock->fd[1]);
396 }
397
398 /* simple line buffering */
399 static int buffer_gets(struct imap_buffer *b, char **s)
400 {
401 int n;
402 int start = b->offset;
403
404 *s = b->buf + start;
405
406 for (;;) {
407 /* make sure we have enough data to read the \r\n sequence */
408 if (b->offset + 1 >= b->bytes) {
409 if (start) {
410 /* shift down used bytes */
411 *s = b->buf;
412
413 assert(start <= b->bytes);
414 n = b->bytes - start;
415
416 if (n)
417 memmove(b->buf, b->buf + start, n);
418 b->offset -= start;
419 b->bytes = n;
420 start = 0;
421 }
422
423 n = socket_read(&b->sock, b->buf + b->bytes,
424 sizeof(b->buf) - b->bytes);
425
426 if (n <= 0)
427 return -1;
428
429 b->bytes += n;
430 }
431
432 if (b->buf[b->offset] == '\r') {
433 assert(b->offset + 1 < b->bytes);
434 if (b->buf[b->offset + 1] == '\n') {
435 b->buf[b->offset] = 0; /* terminate the string */
436 b->offset += 2; /* next line */
437 if (0 < verbosity)
438 puts(*s);
439 return 0;
440 }
441 }
442
443 b->offset++;
444 }
445 /* not reached */
446 }
447
448 __attribute__((format (printf, 1, 2)))
449 static void imap_info(const char *msg, ...)
450 {
451 va_list va;
452
453 if (0 <= verbosity) {
454 va_start(va, msg);
455 vprintf(msg, va);
456 va_end(va);
457 fflush(stdout);
458 }
459 }
460
461 __attribute__((format (printf, 1, 2)))
462 static void imap_warn(const char *msg, ...)
463 {
464 va_list va;
465
466 if (-2 < verbosity) {
467 va_start(va, msg);
468 vfprintf(stderr, msg, va);
469 va_end(va);
470 }
471 }
472
473 static char *next_arg(char **s)
474 {
475 char *ret;
476
477 if (!s || !*s)
478 return NULL;
479 while (isspace((unsigned char) **s))
480 (*s)++;
481 if (!**s) {
482 *s = NULL;
483 return NULL;
484 }
485 if (**s == '"') {
486 ++*s;
487 ret = *s;
488 *s = strchr(*s, '"');
489 } else {
490 ret = *s;
491 while (**s && !isspace((unsigned char) **s))
492 (*s)++;
493 }
494 if (*s) {
495 if (**s)
496 *(*s)++ = 0;
497 if (!**s)
498 *s = NULL;
499 }
500 return ret;
501 }
502
503 __attribute__((format (printf, 3, 4)))
504 static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
505 {
506 int ret;
507 va_list va;
508
509 va_start(va, fmt);
510 if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
511 BUG("buffer too small. Please report a bug.");
512 va_end(va);
513 return ret;
514 }
515
516 static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
517 struct imap_cmd_cb *cb,
518 const char *fmt, va_list ap)
519 {
520 struct imap *imap = ctx->imap;
521 struct imap_cmd *cmd;
522 int n, bufl;
523 char buf[1024];
524
525 cmd = xmalloc(sizeof(struct imap_cmd));
526 nfvasprintf(&cmd->cmd, fmt, ap);
527 cmd->tag = ++imap->nexttag;
528
529 if (cb)
530 cmd->cb = *cb;
531 else
532 memset(&cmd->cb, 0, sizeof(cmd->cb));
533
534 while (imap->literal_pending)
535 get_cmd_result(ctx, NULL);
536
537 if (!cmd->cb.data)
538 bufl = nfsnprintf(buf, sizeof(buf), "%d %s\r\n", cmd->tag, cmd->cmd);
539 else
540 bufl = nfsnprintf(buf, sizeof(buf), "%d %s{%d%s}\r\n",
541 cmd->tag, cmd->cmd, cmd->cb.dlen,
542 CAP(LITERALPLUS) ? "+" : "");
543
544 if (0 < verbosity) {
545 if (imap->num_in_progress)
546 printf("(%d in progress) ", imap->num_in_progress);
547 if (!starts_with(cmd->cmd, "LOGIN"))
548 printf(">>> %s", buf);
549 else
550 printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
551 }
552 if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
553 free(cmd->cmd);
554 free(cmd);
555 if (cb)
556 free(cb->data);
557 return NULL;
558 }
559 if (cmd->cb.data) {
560 if (CAP(LITERALPLUS)) {
561 n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
562 free(cmd->cb.data);
563 if (n != cmd->cb.dlen ||
564 socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
565 free(cmd->cmd);
566 free(cmd);
567 return NULL;
568 }
569 cmd->cb.data = NULL;
570 } else
571 imap->literal_pending = 1;
572 } else if (cmd->cb.cont)
573 imap->literal_pending = 1;
574 cmd->next = NULL;
575 *imap->in_progress_append = cmd;
576 imap->in_progress_append = &cmd->next;
577 imap->num_in_progress++;
578 return cmd;
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 = 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 = 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 skip_imap_list_l(char **sp, int level)
618 {
619 char *s = *sp;
620
621 for (;;) {
622 while (isspace((unsigned char)*s))
623 s++;
624 if (level && *s == ')') {
625 s++;
626 break;
627 }
628 if (*s == '(') {
629 /* sublist */
630 s++;
631 if (skip_imap_list_l(&s, level + 1))
632 goto bail;
633 } else if (*s == '"') {
634 /* quoted string */
635 s++;
636 for (; *s != '"'; s++)
637 if (!*s)
638 goto bail;
639 s++;
640 } else {
641 /* atom */
642 for (; *s && !isspace((unsigned char)*s); s++)
643 if (level && *s == ')')
644 break;
645 }
646
647 if (!level)
648 break;
649 if (!*s)
650 goto bail;
651 }
652 *sp = s;
653 return 0;
654
655 bail:
656 return -1;
657 }
658
659 static void skip_list(char **sp)
660 {
661 skip_imap_list_l(sp, 0);
662 }
663
664 static void parse_capability(struct imap *imap, char *cmd)
665 {
666 char *arg;
667 unsigned i;
668
669 imap->caps = 0x80000000;
670 while ((arg = next_arg(&cmd)))
671 for (i = 0; i < ARRAY_SIZE(cap_list); i++)
672 if (!strcmp(cap_list[i], arg))
673 imap->caps |= 1 << i;
674 imap->rcaps = imap->caps;
675 }
676
677 static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
678 char *s)
679 {
680 struct imap *imap = ctx->imap;
681 char *arg, *p;
682
683 if (!s || *s != '[')
684 return RESP_OK; /* no response code */
685 s++;
686 if (!(p = strchr(s, ']'))) {
687 fprintf(stderr, "IMAP error: malformed response code\n");
688 return RESP_BAD;
689 }
690 *p++ = 0;
691 arg = next_arg(&s);
692 if (!arg) {
693 fprintf(stderr, "IMAP error: empty response code\n");
694 return RESP_BAD;
695 }
696 if (!strcmp("UIDVALIDITY", arg)) {
697 if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg))) {
698 fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
699 return RESP_BAD;
700 }
701 } else if (!strcmp("UIDNEXT", arg)) {
702 if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
703 fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
704 return RESP_BAD;
705 }
706 } else if (!strcmp("CAPABILITY", arg)) {
707 parse_capability(imap, s);
708 } else if (!strcmp("ALERT", arg)) {
709 /* RFC2060 says that these messages MUST be displayed
710 * to the user
711 */
712 for (; isspace((unsigned char)*p); p++);
713 fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
714 } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
715 if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg)) ||
716 !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
717 fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
718 return RESP_BAD;
719 }
720 }
721 return RESP_OK;
722 }
723
724 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
725 {
726 struct imap *imap = ctx->imap;
727 struct imap_cmd *cmdp, **pcmdp;
728 char *cmd;
729 const char *arg, *arg1;
730 int n, resp, resp2, tag;
731
732 for (;;) {
733 if (buffer_gets(&imap->buf, &cmd))
734 return RESP_BAD;
735
736 arg = next_arg(&cmd);
737 if (!arg) {
738 fprintf(stderr, "IMAP error: empty response\n");
739 return RESP_BAD;
740 }
741 if (*arg == '*') {
742 arg = next_arg(&cmd);
743 if (!arg) {
744 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
745 return RESP_BAD;
746 }
747
748 if (!strcmp("NAMESPACE", arg)) {
749 /* rfc2342 NAMESPACE response. */
750 skip_list(&cmd); /* Personal mailboxes */
751 skip_list(&cmd); /* Others' mailboxes */
752 skip_list(&cmd); /* Shared mailboxes */
753 } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
754 !strcmp("NO", arg) || !strcmp("BYE", arg)) {
755 if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
756 return resp;
757 } else if (!strcmp("CAPABILITY", arg)) {
758 parse_capability(imap, cmd);
759 } else if ((arg1 = next_arg(&cmd))) {
760 ; /*
761 * Unhandled response-data with at least two words.
762 * Ignore it.
763 *
764 * NEEDSWORK: Previously this case handled '<num> EXISTS'
765 * and '<num> RECENT' but as a probably-unintended side
766 * effect it ignores other unrecognized two-word
767 * responses. imap-send doesn't ever try to read
768 * messages or mailboxes these days, so consider
769 * eliminating this case.
770 */
771 } else {
772 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
773 return RESP_BAD;
774 }
775 } else if (!imap->in_progress) {
776 fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
777 return RESP_BAD;
778 } else if (*arg == '+') {
779 /* This can happen only with the last command underway, as
780 it enforces a round-trip. */
781 cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
782 offsetof(struct imap_cmd, next));
783 if (cmdp->cb.data) {
784 n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
785 FREE_AND_NULL(cmdp->cb.data);
786 if (n != (int)cmdp->cb.dlen)
787 return RESP_BAD;
788 } else if (cmdp->cb.cont) {
789 if (cmdp->cb.cont(ctx, cmd))
790 return RESP_BAD;
791 } else {
792 fprintf(stderr, "IMAP error: unexpected command continuation request\n");
793 return RESP_BAD;
794 }
795 if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
796 return RESP_BAD;
797 if (!cmdp->cb.cont)
798 imap->literal_pending = 0;
799 if (!tcmd)
800 return DRV_OK;
801 } else {
802 tag = atoi(arg);
803 for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
804 if (cmdp->tag == tag)
805 goto gottag;
806 fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
807 return RESP_BAD;
808 gottag:
809 if (!(*pcmdp = cmdp->next))
810 imap->in_progress_append = pcmdp;
811 imap->num_in_progress--;
812 if (cmdp->cb.cont || cmdp->cb.data)
813 imap->literal_pending = 0;
814 arg = next_arg(&cmd);
815 if (!arg)
816 arg = "";
817 if (!strcmp("OK", arg))
818 resp = DRV_OK;
819 else {
820 if (!strcmp("NO", arg))
821 resp = RESP_NO;
822 else /*if (!strcmp("BAD", arg))*/
823 resp = RESP_BAD;
824 fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
825 !starts_with(cmdp->cmd, "LOGIN") ?
826 cmdp->cmd : "LOGIN <user> <pass>",
827 arg, cmd ? cmd : "");
828 }
829 if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
830 resp = resp2;
831 free(cmdp->cb.data);
832 free(cmdp->cmd);
833 free(cmdp);
834 if (!tcmd || tcmd == cmdp)
835 return resp;
836 }
837 }
838 /* not reached */
839 }
840
841 static void imap_close_server(struct imap_store *ictx)
842 {
843 struct imap *imap = ictx->imap;
844
845 if (imap->buf.sock.fd[0] != -1) {
846 imap_exec(ictx, NULL, "LOGOUT");
847 socket_shutdown(&imap->buf.sock);
848 }
849 free(imap);
850 }
851
852 static void imap_close_store(struct imap_store *ctx)
853 {
854 imap_close_server(ctx);
855 free(ctx);
856 }
857
858 #ifndef NO_OPENSSL
859
860 /*
861 * hexchar() and cram() functions are based on the code from the isync
862 * project (https://isync.sourceforge.io/).
863 */
864 static char hexchar(unsigned int b)
865 {
866 return b < 10 ? '0' + b : 'a' + (b - 10);
867 }
868
869 #define ENCODED_SIZE(n) (4 * DIV_ROUND_UP((n), 3))
870 static char *cram(const char *challenge_64, const char *user, const char *pass)
871 {
872 int i, resp_len, encoded_len, decoded_len;
873 unsigned char hash[16];
874 char hex[33];
875 char *response, *response_64, *challenge;
876
877 /*
878 * length of challenge_64 (i.e. base-64 encoded string) is a good
879 * enough upper bound for challenge (decoded result).
880 */
881 encoded_len = strlen(challenge_64);
882 challenge = xmalloc(encoded_len);
883 decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
884 (unsigned char *)challenge_64, encoded_len);
885 if (decoded_len < 0)
886 die("invalid challenge %s", challenge_64);
887 if (!HMAC(EVP_md5(), pass, strlen(pass), (unsigned char *)challenge, decoded_len, hash, NULL))
888 die("HMAC error");
889
890 hex[32] = 0;
891 for (i = 0; i < 16; i++) {
892 hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
893 hex[2 * i + 1] = hexchar(hash[i] & 0xf);
894 }
895
896 /* response: "<user> <digest in hex>" */
897 response = xstrfmt("%s %s", user, hex);
898 resp_len = strlen(response);
899
900 response_64 = xmallocz(ENCODED_SIZE(resp_len));
901 encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
902 (unsigned char *)response, resp_len);
903 if (encoded_len < 0)
904 die("EVP_EncodeBlock error");
905 return (char *)response_64;
906 }
907
908 #else
909
910 static char *cram(const char *challenge_64 UNUSED,
911 const char *user UNUSED,
912 const char *pass UNUSED)
913 {
914 die("If you want to use CRAM-MD5 authenticate method, "
915 "you have to build git-imap-send with OpenSSL library.");
916 }
917
918 #endif
919
920 static int auth_cram_md5(struct imap_store *ctx, const char *prompt)
921 {
922 int ret;
923 char *response;
924
925 response = cram(prompt, server.user, server.pass);
926
927 ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
928 if (ret != strlen(response))
929 return error("IMAP error: sending response failed");
930
931 free(response);
932
933 return 0;
934 }
935
936 static void server_fill_credential(struct imap_server_conf *srvc, struct credential *cred)
937 {
938 if (srvc->user && srvc->pass)
939 return;
940
941 cred->protocol = xstrdup(srvc->use_ssl ? "imaps" : "imap");
942 cred->host = xstrdup(srvc->host);
943
944 cred->username = xstrdup_or_null(srvc->user);
945 cred->password = xstrdup_or_null(srvc->pass);
946
947 credential_fill(cred);
948
949 if (!srvc->user)
950 srvc->user = xstrdup(cred->username);
951 if (!srvc->pass)
952 srvc->pass = xstrdup(cred->password);
953 }
954
955 static struct imap_store *imap_open_store(struct imap_server_conf *srvc, const char *folder)
956 {
957 struct credential cred = CREDENTIAL_INIT;
958 struct imap_store *ctx;
959 struct imap *imap;
960 char *arg, *rsp;
961 int s = -1, preauth;
962
963 CALLOC_ARRAY(ctx, 1);
964
965 ctx->imap = CALLOC_ARRAY(imap, 1);
966 imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
967 imap->in_progress_append = &imap->in_progress;
968
969 /* open connection to IMAP server */
970
971 if (srvc->tunnel) {
972 struct child_process tunnel = CHILD_PROCESS_INIT;
973
974 imap_info("Starting tunnel '%s'... ", srvc->tunnel);
975
976 strvec_push(&tunnel.args, srvc->tunnel);
977 tunnel.use_shell = 1;
978 tunnel.in = -1;
979 tunnel.out = -1;
980 if (start_command(&tunnel))
981 die("cannot start proxy %s", srvc->tunnel);
982
983 imap->buf.sock.fd[0] = tunnel.out;
984 imap->buf.sock.fd[1] = tunnel.in;
985
986 imap_info("ok\n");
987 } else {
988 #ifndef NO_IPV6
989 struct addrinfo hints, *ai0, *ai;
990 int gai;
991 char portstr[6];
992
993 xsnprintf(portstr, sizeof(portstr), "%d", srvc->port);
994
995 memset(&hints, 0, sizeof(hints));
996 hints.ai_socktype = SOCK_STREAM;
997 hints.ai_protocol = IPPROTO_TCP;
998
999 imap_info("Resolving %s... ", srvc->host);
1000 gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
1001 if (gai) {
1002 fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
1003 goto bail;
1004 }
1005 imap_info("ok\n");
1006
1007 for (ai0 = ai; ai; ai = ai->ai_next) {
1008 char addr[NI_MAXHOST];
1009
1010 s = socket(ai->ai_family, ai->ai_socktype,
1011 ai->ai_protocol);
1012 if (s < 0)
1013 continue;
1014
1015 getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1016 sizeof(addr), NULL, 0, NI_NUMERICHOST);
1017 imap_info("Connecting to [%s]:%s... ", addr, portstr);
1018
1019 if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1020 close(s);
1021 s = -1;
1022 perror("connect");
1023 continue;
1024 }
1025
1026 break;
1027 }
1028 freeaddrinfo(ai0);
1029 #else /* NO_IPV6 */
1030 struct hostent *he;
1031 struct sockaddr_in addr;
1032
1033 memset(&addr, 0, sizeof(addr));
1034 addr.sin_port = htons(srvc->port);
1035 addr.sin_family = AF_INET;
1036
1037 imap_info("Resolving %s... ", srvc->host);
1038 he = gethostbyname(srvc->host);
1039 if (!he) {
1040 perror("gethostbyname");
1041 goto bail;
1042 }
1043 imap_info("ok\n");
1044
1045 addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1046
1047 s = socket(PF_INET, SOCK_STREAM, 0);
1048
1049 imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1050 if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1051 close(s);
1052 s = -1;
1053 perror("connect");
1054 }
1055 #endif
1056 if (s < 0) {
1057 fputs("Error: unable to connect to server.\n", stderr);
1058 goto bail;
1059 }
1060
1061 imap->buf.sock.fd[0] = s;
1062 imap->buf.sock.fd[1] = dup(s);
1063
1064 if (srvc->use_ssl &&
1065 ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1066 close(s);
1067 goto bail;
1068 }
1069 imap_info("ok\n");
1070 }
1071
1072 /* read the greeting string */
1073 if (buffer_gets(&imap->buf, &rsp)) {
1074 fprintf(stderr, "IMAP error: no greeting response\n");
1075 goto bail;
1076 }
1077 arg = next_arg(&rsp);
1078 if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1079 fprintf(stderr, "IMAP error: invalid greeting response\n");
1080 goto bail;
1081 }
1082 preauth = 0;
1083 if (!strcmp("PREAUTH", arg))
1084 preauth = 1;
1085 else if (strcmp("OK", arg) != 0) {
1086 fprintf(stderr, "IMAP error: unknown greeting response\n");
1087 goto bail;
1088 }
1089 parse_response_code(ctx, NULL, rsp);
1090 if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1091 goto bail;
1092
1093 if (!preauth) {
1094 #ifndef NO_OPENSSL
1095 if (!srvc->use_ssl && CAP(STARTTLS)) {
1096 if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK)
1097 goto bail;
1098 if (ssl_socket_connect(&imap->buf.sock, 1,
1099 srvc->ssl_verify))
1100 goto bail;
1101 /* capabilities may have changed, so get the new capabilities */
1102 if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1103 goto bail;
1104 }
1105 #endif
1106 imap_info("Logging in...\n");
1107 server_fill_credential(srvc, &cred);
1108
1109 if (srvc->auth_method) {
1110 struct imap_cmd_cb cb;
1111
1112 if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1113 if (!CAP(AUTH_CRAM_MD5)) {
1114 fprintf(stderr, "You specified "
1115 "CRAM-MD5 as authentication method, "
1116 "but %s doesn't support it.\n", srvc->host);
1117 goto bail;
1118 }
1119 /* CRAM-MD5 */
1120
1121 memset(&cb, 0, sizeof(cb));
1122 cb.cont = auth_cram_md5;
1123 if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1124 fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1125 goto bail;
1126 }
1127 } else {
1128 fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1129 goto bail;
1130 }
1131 } else {
1132 if (CAP(NOLOGIN)) {
1133 fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n",
1134 srvc->user, srvc->host);
1135 goto bail;
1136 }
1137 if (!imap->buf.sock.ssl)
1138 imap_warn("*** IMAP Warning *** Password is being "
1139 "sent in the clear\n");
1140 if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1141 fprintf(stderr, "IMAP error: LOGIN failed\n");
1142 goto bail;
1143 }
1144 }
1145 } /* !preauth */
1146
1147 if (cred.username)
1148 credential_approve(&cred);
1149 credential_clear(&cred);
1150
1151 /* check the target mailbox exists */
1152 ctx->name = folder;
1153 switch (imap_exec(ctx, NULL, "EXAMINE \"%s\"", ctx->name)) {
1154 case RESP_OK:
1155 /* ok */
1156 break;
1157 case RESP_BAD:
1158 fprintf(stderr, "IMAP error: could not check mailbox\n");
1159 goto out;
1160 case RESP_NO:
1161 if (imap_exec(ctx, NULL, "CREATE \"%s\"", ctx->name) == RESP_OK) {
1162 imap_info("Created missing mailbox\n");
1163 } else {
1164 fprintf(stderr, "IMAP error: could not create missing mailbox\n");
1165 goto out;
1166 }
1167 break;
1168 }
1169
1170 ctx->prefix = "";
1171 return ctx;
1172
1173 bail:
1174 if (cred.username)
1175 credential_reject(&cred);
1176 credential_clear(&cred);
1177
1178 out:
1179 imap_close_store(ctx);
1180 return NULL;
1181 }
1182
1183 /*
1184 * Insert CR characters as necessary in *msg to ensure that every LF
1185 * character in *msg is preceded by a CR.
1186 */
1187 static void lf_to_crlf(struct strbuf *msg)
1188 {
1189 char *new_msg;
1190 size_t i, j;
1191 char lastc;
1192
1193 /* First pass: tally, in j, the size of the new_msg string: */
1194 for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1195 if (msg->buf[i] == '\n' && lastc != '\r')
1196 j++; /* a CR will need to be added here */
1197 lastc = msg->buf[i];
1198 j++;
1199 }
1200
1201 new_msg = xmallocz(j);
1202
1203 /*
1204 * Second pass: write the new_msg string. Note that this loop is
1205 * otherwise identical to the first pass.
1206 */
1207 for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1208 if (msg->buf[i] == '\n' && lastc != '\r')
1209 new_msg[j++] = '\r';
1210 lastc = new_msg[j++] = msg->buf[i];
1211 }
1212 strbuf_attach(msg, new_msg, j, j + 1);
1213 }
1214
1215 /*
1216 * Store msg to IMAP. Also detach and free the data from msg->data,
1217 * leaving msg->data empty.
1218 */
1219 static int imap_store_msg(struct imap_store *ctx, struct strbuf *msg)
1220 {
1221 struct imap *imap = ctx->imap;
1222 struct imap_cmd_cb cb;
1223 const char *prefix, *box;
1224 int ret;
1225
1226 lf_to_crlf(msg);
1227 memset(&cb, 0, sizeof(cb));
1228
1229 cb.dlen = msg->len;
1230 cb.data = strbuf_detach(msg, NULL);
1231
1232 box = ctx->name;
1233 prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1234 ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" ", prefix, box);
1235 imap->caps = imap->rcaps;
1236 if (ret != DRV_OK)
1237 return ret;
1238
1239 return DRV_OK;
1240 }
1241
1242 static void wrap_in_html(struct strbuf *msg)
1243 {
1244 struct strbuf buf = STRBUF_INIT;
1245 static char *content_type = "Content-Type: text/html;\n";
1246 static char *pre_open = "<pre>\n";
1247 static char *pre_close = "</pre>\n";
1248 const char *body = strstr(msg->buf, "\n\n");
1249
1250 if (!body)
1251 return; /* Headers but no body; no wrapping needed */
1252
1253 body += 2;
1254
1255 strbuf_add(&buf, msg->buf, body - msg->buf - 1);
1256 strbuf_addstr(&buf, content_type);
1257 strbuf_addch(&buf, '\n');
1258 strbuf_addstr(&buf, pre_open);
1259 strbuf_addstr_xml_quoted(&buf, body);
1260 strbuf_addstr(&buf, pre_close);
1261
1262 strbuf_release(msg);
1263 *msg = buf;
1264 }
1265
1266 static int count_messages(struct strbuf *all_msgs)
1267 {
1268 int count = 0;
1269 char *p = all_msgs->buf;
1270
1271 while (1) {
1272 if (starts_with(p, "From ")) {
1273 p = strstr(p+5, "\nFrom: ");
1274 if (!p) break;
1275 p = strstr(p+7, "\nDate: ");
1276 if (!p) break;
1277 p = strstr(p+7, "\nSubject: ");
1278 if (!p) break;
1279 p += 10;
1280 count++;
1281 }
1282 p = strstr(p+5, "\nFrom ");
1283 if (!p)
1284 break;
1285 p++;
1286 }
1287 return count;
1288 }
1289
1290 /*
1291 * Copy the next message from all_msgs, starting at offset *ofs, to
1292 * msg. Update *ofs to the start of the following message. Return
1293 * true iff a message was successfully copied.
1294 */
1295 static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs)
1296 {
1297 char *p, *data;
1298 size_t len;
1299
1300 if (*ofs >= all_msgs->len)
1301 return 0;
1302
1303 data = &all_msgs->buf[*ofs];
1304 len = all_msgs->len - *ofs;
1305
1306 if (len < 5 || !starts_with(data, "From "))
1307 return 0;
1308
1309 p = strchr(data, '\n');
1310 if (p) {
1311 p++;
1312 len -= p - data;
1313 *ofs += p - data;
1314 data = p;
1315 }
1316
1317 p = strstr(data, "\nFrom ");
1318 if (p)
1319 len = &p[1] - data;
1320
1321 strbuf_add(msg, data, len);
1322 *ofs += len;
1323 return 1;
1324 }
1325
1326 static int git_imap_config(const char *var, const char *val,
1327 const struct config_context *ctx, void *cb)
1328 {
1329
1330 if (!strcmp("imap.sslverify", var))
1331 server.ssl_verify = git_config_bool(var, val);
1332 else if (!strcmp("imap.preformattedhtml", var))
1333 server.use_html = git_config_bool(var, val);
1334 else if (!strcmp("imap.folder", var))
1335 return git_config_string(&server.folder, var, val);
1336 else if (!strcmp("imap.user", var))
1337 return git_config_string(&server.user, var, val);
1338 else if (!strcmp("imap.pass", var))
1339 return git_config_string(&server.pass, var, val);
1340 else if (!strcmp("imap.tunnel", var))
1341 return git_config_string(&server.tunnel, var, val);
1342 else if (!strcmp("imap.authmethod", var))
1343 return git_config_string(&server.auth_method, var, val);
1344 else if (!strcmp("imap.port", var))
1345 server.port = git_config_int(var, val, ctx->kvi);
1346 else if (!strcmp("imap.host", var)) {
1347 if (!val) {
1348 return config_error_nonbool(var);
1349 } else {
1350 if (starts_with(val, "imap:"))
1351 val += 5;
1352 else if (starts_with(val, "imaps:")) {
1353 val += 6;
1354 server.use_ssl = 1;
1355 }
1356 if (starts_with(val, "//"))
1357 val += 2;
1358 server.host = xstrdup(val);
1359 }
1360 } else
1361 return git_default_config(var, val, ctx, cb);
1362
1363 return 0;
1364 }
1365
1366 static int append_msgs_to_imap(struct imap_server_conf *server,
1367 struct strbuf* all_msgs, int total)
1368 {
1369 struct strbuf msg = STRBUF_INIT;
1370 struct imap_store *ctx = NULL;
1371 int ofs = 0;
1372 int r;
1373 int n = 0;
1374
1375 ctx = imap_open_store(server, server->folder);
1376 if (!ctx) {
1377 fprintf(stderr, "failed to open store\n");
1378 return 1;
1379 }
1380 ctx->name = server->folder;
1381
1382 fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1383 while (1) {
1384 unsigned percent = n * 100 / total;
1385
1386 fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1387
1388 if (!split_msg(all_msgs, &msg, &ofs))
1389 break;
1390 if (server->use_html)
1391 wrap_in_html(&msg);
1392 r = imap_store_msg(ctx, &msg);
1393 if (r != DRV_OK)
1394 break;
1395 n++;
1396 }
1397 fprintf(stderr, "\n");
1398
1399 imap_close_store(ctx);
1400
1401 return 0;
1402 }
1403
1404 #ifdef USE_CURL_FOR_IMAP_SEND
1405 static CURL *setup_curl(struct imap_server_conf *srvc, struct credential *cred)
1406 {
1407 CURL *curl;
1408 struct strbuf path = STRBUF_INIT;
1409 char *uri_encoded_folder;
1410
1411 if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
1412 die("curl_global_init failed");
1413
1414 curl = curl_easy_init();
1415
1416 if (!curl)
1417 die("curl_easy_init failed");
1418
1419 server_fill_credential(srvc, cred);
1420 curl_easy_setopt(curl, CURLOPT_USERNAME, srvc->user);
1421 curl_easy_setopt(curl, CURLOPT_PASSWORD, srvc->pass);
1422
1423 strbuf_addstr(&path, srvc->use_ssl ? "imaps://" : "imap://");
1424 strbuf_addstr(&path, srvc->host);
1425 if (!path.len || path.buf[path.len - 1] != '/')
1426 strbuf_addch(&path, '/');
1427
1428 uri_encoded_folder = curl_easy_escape(curl, srvc->folder, 0);
1429 if (!uri_encoded_folder)
1430 die("failed to encode server folder");
1431 strbuf_addstr(&path, uri_encoded_folder);
1432 curl_free(uri_encoded_folder);
1433
1434 curl_easy_setopt(curl, CURLOPT_URL, path.buf);
1435 strbuf_release(&path);
1436 curl_easy_setopt(curl, CURLOPT_PORT, srvc->port);
1437
1438 if (srvc->auth_method) {
1439 #ifndef GIT_CURL_HAVE_CURLOPT_LOGIN_OPTIONS
1440 warning("No LOGIN_OPTIONS support in this cURL version");
1441 #else
1442 struct strbuf auth = STRBUF_INIT;
1443 strbuf_addstr(&auth, "AUTH=");
1444 strbuf_addstr(&auth, srvc->auth_method);
1445 curl_easy_setopt(curl, CURLOPT_LOGIN_OPTIONS, auth.buf);
1446 strbuf_release(&auth);
1447 #endif
1448 }
1449
1450 if (!srvc->use_ssl)
1451 curl_easy_setopt(curl, CURLOPT_USE_SSL, (long)CURLUSESSL_TRY);
1452
1453 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, srvc->ssl_verify);
1454 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, srvc->ssl_verify);
1455
1456 curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
1457
1458 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
1459
1460 if (0 < verbosity || getenv("GIT_CURL_VERBOSE"))
1461 http_trace_curl_no_data();
1462 setup_curl_trace(curl);
1463
1464 return curl;
1465 }
1466
1467 static int curl_append_msgs_to_imap(struct imap_server_conf *server,
1468 struct strbuf* all_msgs, int total)
1469 {
1470 int ofs = 0;
1471 int n = 0;
1472 struct buffer msgbuf = { STRBUF_INIT, 0 };
1473 CURL *curl;
1474 CURLcode res = CURLE_OK;
1475 struct credential cred = CREDENTIAL_INIT;
1476
1477 curl = setup_curl(server, &cred);
1478 curl_easy_setopt(curl, CURLOPT_READDATA, &msgbuf);
1479
1480 fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1481 while (1) {
1482 unsigned percent = n * 100 / total;
1483 int prev_len;
1484
1485 fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1486
1487 prev_len = msgbuf.buf.len;
1488 if (!split_msg(all_msgs, &msgbuf.buf, &ofs))
1489 break;
1490 if (server->use_html)
1491 wrap_in_html(&msgbuf.buf);
1492 lf_to_crlf(&msgbuf.buf);
1493
1494 curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE,
1495 (curl_off_t)(msgbuf.buf.len-prev_len));
1496
1497 res = curl_easy_perform(curl);
1498
1499 if(res != CURLE_OK) {
1500 fprintf(stderr, "curl_easy_perform() failed: %s\n",
1501 curl_easy_strerror(res));
1502 break;
1503 }
1504
1505 n++;
1506 }
1507 fprintf(stderr, "\n");
1508
1509 curl_easy_cleanup(curl);
1510 curl_global_cleanup();
1511
1512 if (cred.username) {
1513 if (res == CURLE_OK)
1514 credential_approve(&cred);
1515 else if (res == CURLE_LOGIN_DENIED)
1516 credential_reject(&cred);
1517 }
1518
1519 credential_clear(&cred);
1520
1521 return res != CURLE_OK;
1522 }
1523 #endif
1524
1525 int cmd_main(int argc, const char **argv)
1526 {
1527 struct strbuf all_msgs = STRBUF_INIT;
1528 int total;
1529 int nongit_ok;
1530
1531 setup_git_directory_gently(&nongit_ok);
1532 git_config(git_imap_config, NULL);
1533
1534 argc = parse_options(argc, (const char **)argv, "", imap_send_options, imap_send_usage, 0);
1535
1536 if (argc)
1537 usage_with_options(imap_send_usage, imap_send_options);
1538
1539 #ifndef USE_CURL_FOR_IMAP_SEND
1540 if (use_curl) {
1541 warning("--curl not supported in this build");
1542 use_curl = 0;
1543 }
1544 #elif defined(NO_OPENSSL)
1545 if (!use_curl) {
1546 warning("--no-curl not supported in this build");
1547 use_curl = 1;
1548 }
1549 #endif
1550
1551 if (!server.port)
1552 server.port = server.use_ssl ? 993 : 143;
1553
1554 if (!server.folder) {
1555 fprintf(stderr, "no imap store specified\n");
1556 return 1;
1557 }
1558 if (!server.host) {
1559 if (!server.tunnel) {
1560 fprintf(stderr, "no imap host specified\n");
1561 return 1;
1562 }
1563 server.host = "tunnel";
1564 }
1565
1566 /* read the messages */
1567 if (strbuf_read(&all_msgs, 0, 0) < 0) {
1568 error_errno(_("could not read from stdin"));
1569 return 1;
1570 }
1571
1572 if (all_msgs.len == 0) {
1573 fprintf(stderr, "nothing to send\n");
1574 return 1;
1575 }
1576
1577 total = count_messages(&all_msgs);
1578 if (!total) {
1579 fprintf(stderr, "no messages to send\n");
1580 return 1;
1581 }
1582
1583 /* write it to the imap server */
1584
1585 if (server.tunnel)
1586 return append_msgs_to_imap(&server, &all_msgs, total);
1587
1588 #ifdef USE_CURL_FOR_IMAP_SEND
1589 if (use_curl)
1590 return curl_append_msgs_to_imap(&server, &all_msgs, total);
1591 #endif
1592
1593 return append_msgs_to_imap(&server, &all_msgs, total);
1594 }
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