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diffcore-break: fix leaking filespecs when merging broken pairs
[git/gitster.git] / imap-send.c
blob2dd42807cd53623d17297e5689c7e79ea5b00326
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 #define USE_THE_REPOSITORY_VARIABLE
25
26 #include "git-compat-util.h"
27 #include "config.h"
28 #include "credential.h"
29 #include "gettext.h"
30 #include "run-command.h"
31 #include "parse-options.h"
32 #include "setup.h"
33 #include "strbuf.h"
34 #if defined(NO_OPENSSL) && !defined(HAVE_OPENSSL_CSPRNG)
35 typedef void *SSL;
36 #endif
37 #ifdef USE_CURL_FOR_IMAP_SEND
38 #include "http.h"
39 #endif
40
41 #if defined(USE_CURL_FOR_IMAP_SEND)
42 /* Always default to curl if it's available. */
43 #define USE_CURL_DEFAULT 1
44 #else
45 /* We don't have curl, so continue to use the historical implementation */
46 #define USE_CURL_DEFAULT 0
47 #endif
48
49 static int verbosity;
50 static int use_curl = USE_CURL_DEFAULT;
51
52 static const char * const imap_send_usage[] = { "git imap-send [-v] [-q] [--[no-]curl] < <mbox>", NULL };
53
54 static struct option imap_send_options[] = {
55 OPT__VERBOSITY(&verbosity),
56 OPT_BOOL(0, "curl", &use_curl, "use libcurl to communicate with the IMAP server"),
57 OPT_END()
58 };
59
60 #undef DRV_OK
61 #define DRV_OK 0
62 #define DRV_MSG_BAD -1
63 #define DRV_BOX_BAD -2
64 #define DRV_STORE_BAD -3
65
66 __attribute__((format (printf, 1, 2)))
67 static void imap_info(const char *, ...);
68 __attribute__((format (printf, 1, 2)))
69 static void imap_warn(const char *, ...);
70
71 static char *next_arg(char **);
72
73 struct imap_server_conf {
74 char *tunnel;
75 char *host;
76 int port;
77 char *folder;
78 char *user;
79 char *pass;
80 int use_ssl;
81 int ssl_verify;
82 int use_html;
83 char *auth_method;
84 };
85
86 struct imap_socket {
87 int fd[2];
88 SSL *ssl;
89 };
90
91 struct imap_buffer {
92 struct imap_socket sock;
93 int bytes;
94 int offset;
95 char buf[1024];
96 };
97
98 struct imap_cmd;
99
100 struct imap {
101 int uidnext; /* from SELECT responses */
102 unsigned caps, rcaps; /* CAPABILITY results */
103 /* command queue */
104 int nexttag, num_in_progress, literal_pending;
105 struct imap_cmd *in_progress, **in_progress_append;
106 struct imap_buffer buf; /* this is BIG, so put it last */
107 };
108
109 struct imap_store {
110 const struct imap_server_conf *cfg;
111 /* currently open mailbox */
112 const char *name; /* foreign! maybe preset? */
113 int uidvalidity;
114 struct imap *imap;
115 const char *prefix;
116 };
117
118 struct imap_cmd_cb {
119 int (*cont)(struct imap_store *ctx, const char *prompt);
120 void *ctx;
121 char *data;
122 int dlen;
123 };
124
125 struct imap_cmd {
126 struct imap_cmd *next;
127 struct imap_cmd_cb cb;
128 char *cmd;
129 int tag;
130 };
131
132 #define CAP(cap) (imap->caps & (1 << (cap)))
133
134 enum CAPABILITY {
135 NOLOGIN = 0,
136 UIDPLUS,
137 LITERALPLUS,
138 NAMESPACE,
139 STARTTLS,
140 AUTH_CRAM_MD5
141 };
142
143 static const char *cap_list[] = {
144 "LOGINDISABLED",
145 "UIDPLUS",
146 "LITERAL+",
147 "NAMESPACE",
148 "STARTTLS",
149 "AUTH=CRAM-MD5",
150 };
151
152 #define RESP_OK 0
153 #define RESP_NO 1
154 #define RESP_BAD 2
155
156 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
157
158
159 #ifndef NO_OPENSSL
160 static void ssl_socket_perror(const char *func)
161 {
162 fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
163 }
164 #endif
165
166 static void socket_perror(const char *func, struct imap_socket *sock, int ret)
167 {
168 #ifndef NO_OPENSSL
169 if (sock->ssl) {
170 int sslerr = SSL_get_error(sock->ssl, ret);
171 switch (sslerr) {
172 case SSL_ERROR_NONE:
173 break;
174 case SSL_ERROR_SYSCALL:
175 perror("SSL_connect");
176 break;
177 default:
178 ssl_socket_perror("SSL_connect");
179 break;
180 }
181 } else
182 #endif
183 {
184 if (ret < 0)
185 perror(func);
186 else
187 fprintf(stderr, "%s: unexpected EOF\n", func);
188 }
189 /* mark as used to appease -Wunused-parameter with NO_OPENSSL */
190 (void)sock;
191 }
192
193 #ifdef NO_OPENSSL
194 static int ssl_socket_connect(struct imap_socket *sock UNUSED,
195 const struct imap_server_conf *cfg UNUSED,
196 int use_tls_only UNUSED)
197 {
198 fprintf(stderr, "SSL requested but SSL support not compiled in\n");
199 return -1;
200 }
201
202 #else
203
204 static int host_matches(const char *host, const char *pattern)
205 {
206 if (pattern[0] == '*' && pattern[1] == '.') {
207 pattern += 2;
208 if (!(host = strchr(host, '.')))
209 return 0;
210 host++;
211 }
212
213 return *host && *pattern && !strcasecmp(host, pattern);
214 }
215
216 static int verify_hostname(X509 *cert, const char *hostname)
217 {
218 int len;
219 X509_NAME *subj;
220 char cname[1000];
221 int i, found;
222 STACK_OF(GENERAL_NAME) *subj_alt_names;
223
224 /* try the DNS subjectAltNames */
225 found = 0;
226 if ((subj_alt_names = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL))) {
227 int num_subj_alt_names = sk_GENERAL_NAME_num(subj_alt_names);
228 for (i = 0; !found && i < num_subj_alt_names; i++) {
229 GENERAL_NAME *subj_alt_name = sk_GENERAL_NAME_value(subj_alt_names, i);
230 if (subj_alt_name->type == GEN_DNS &&
231 strlen((const char *)subj_alt_name->d.ia5->data) == (size_t)subj_alt_name->d.ia5->length &&
232 host_matches(hostname, (const char *)(subj_alt_name->d.ia5->data)))
233 found = 1;
234 }
235 sk_GENERAL_NAME_pop_free(subj_alt_names, GENERAL_NAME_free);
236 }
237 if (found)
238 return 0;
239
240 /* try the common name */
241 if (!(subj = X509_get_subject_name(cert)))
242 return error("cannot get certificate subject");
243 if ((len = X509_NAME_get_text_by_NID(subj, NID_commonName, cname, sizeof(cname))) < 0)
244 return error("cannot get certificate common name");
245 if (strlen(cname) == (size_t)len && host_matches(hostname, cname))
246 return 0;
247 return error("certificate owner '%s' does not match hostname '%s'",
248 cname, hostname);
249 }
250
251 static int ssl_socket_connect(struct imap_socket *sock,
252 const struct imap_server_conf *cfg,
253 int use_tls_only)
254 {
255 #if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
256 const SSL_METHOD *meth;
257 #else
258 SSL_METHOD *meth;
259 #endif
260 SSL_CTX *ctx;
261 int ret;
262 X509 *cert;
263
264 SSL_library_init();
265 SSL_load_error_strings();
266
267 meth = SSLv23_method();
268 if (!meth) {
269 ssl_socket_perror("SSLv23_method");
270 return -1;
271 }
272
273 ctx = SSL_CTX_new(meth);
274 if (!ctx) {
275 ssl_socket_perror("SSL_CTX_new");
276 return -1;
277 }
278
279 if (use_tls_only)
280 SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3);
281
282 if (cfg->ssl_verify)
283 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
284
285 if (!SSL_CTX_set_default_verify_paths(ctx)) {
286 ssl_socket_perror("SSL_CTX_set_default_verify_paths");
287 return -1;
288 }
289 sock->ssl = SSL_new(ctx);
290 if (!sock->ssl) {
291 ssl_socket_perror("SSL_new");
292 return -1;
293 }
294 if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
295 ssl_socket_perror("SSL_set_rfd");
296 return -1;
297 }
298 if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
299 ssl_socket_perror("SSL_set_wfd");
300 return -1;
301 }
302
303 #ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
304 /*
305 * SNI (RFC4366)
306 * OpenSSL does not document this function, but the implementation
307 * returns 1 on success, 0 on failure after calling SSLerr().
308 */
309 ret = SSL_set_tlsext_host_name(sock->ssl, cfg->host);
310 if (ret != 1)
311 warning("SSL_set_tlsext_host_name(%s) failed.", cfg->host);
312 #endif
313
314 ret = SSL_connect(sock->ssl);
315 if (ret <= 0) {
316 socket_perror("SSL_connect", sock, ret);
317 return -1;
318 }
319
320 if (cfg->ssl_verify) {
321 /* make sure the hostname matches that of the certificate */
322 cert = SSL_get_peer_certificate(sock->ssl);
323 if (!cert)
324 return error("unable to get peer certificate.");
325 if (verify_hostname(cert, cfg->host) < 0)
326 return -1;
327 }
328
329 return 0;
330 }
331 #endif
332
333 static int socket_read(struct imap_socket *sock, char *buf, int len)
334 {
335 ssize_t n;
336 #ifndef NO_OPENSSL
337 if (sock->ssl)
338 n = SSL_read(sock->ssl, buf, len);
339 else
340 #endif
341 n = xread(sock->fd[0], buf, len);
342 if (n <= 0) {
343 socket_perror("read", sock, n);
344 close(sock->fd[0]);
345 close(sock->fd[1]);
346 sock->fd[0] = sock->fd[1] = -1;
347 }
348 return n;
349 }
350
351 static int socket_write(struct imap_socket *sock, const char *buf, int len)
352 {
353 int n;
354 #ifndef NO_OPENSSL
355 if (sock->ssl)
356 n = SSL_write(sock->ssl, buf, len);
357 else
358 #endif
359 n = write_in_full(sock->fd[1], buf, len);
360 if (n != len) {
361 socket_perror("write", sock, n);
362 close(sock->fd[0]);
363 close(sock->fd[1]);
364 sock->fd[0] = sock->fd[1] = -1;
365 }
366 return n;
367 }
368
369 static void socket_shutdown(struct imap_socket *sock)
370 {
371 #ifndef NO_OPENSSL
372 if (sock->ssl) {
373 SSL_shutdown(sock->ssl);
374 SSL_free(sock->ssl);
375 }
376 #endif
377 close(sock->fd[0]);
378 close(sock->fd[1]);
379 }
380
381 /* simple line buffering */
382 static int buffer_gets(struct imap_buffer *b, char **s)
383 {
384 int n;
385 int start = b->offset;
386
387 *s = b->buf + start;
388
389 for (;;) {
390 /* make sure we have enough data to read the \r\n sequence */
391 if (b->offset + 1 >= b->bytes) {
392 if (start) {
393 /* shift down used bytes */
394 *s = b->buf;
395
396 assert(start <= b->bytes);
397 n = b->bytes - start;
398
399 if (n)
400 memmove(b->buf, b->buf + start, n);
401 b->offset -= start;
402 b->bytes = n;
403 start = 0;
404 }
405
406 n = socket_read(&b->sock, b->buf + b->bytes,
407 sizeof(b->buf) - b->bytes);
408
409 if (n <= 0)
410 return -1;
411
412 b->bytes += n;
413 }
414
415 if (b->buf[b->offset] == '\r') {
416 assert(b->offset + 1 < b->bytes);
417 if (b->buf[b->offset + 1] == '\n') {
418 b->buf[b->offset] = 0; /* terminate the string */
419 b->offset += 2; /* next line */
420 if (0 < verbosity)
421 puts(*s);
422 return 0;
423 }
424 }
425
426 b->offset++;
427 }
428 /* not reached */
429 }
430
431 __attribute__((format (printf, 1, 2)))
432 static void imap_info(const char *msg, ...)
433 {
434 va_list va;
435
436 if (0 <= verbosity) {
437 va_start(va, msg);
438 vprintf(msg, va);
439 va_end(va);
440 fflush(stdout);
441 }
442 }
443
444 __attribute__((format (printf, 1, 2)))
445 static void imap_warn(const char *msg, ...)
446 {
447 va_list va;
448
449 if (-2 < verbosity) {
450 va_start(va, msg);
451 vfprintf(stderr, msg, va);
452 va_end(va);
453 }
454 }
455
456 static char *next_arg(char **s)
457 {
458 char *ret;
459
460 if (!s || !*s)
461 return NULL;
462 while (isspace((unsigned char) **s))
463 (*s)++;
464 if (!**s) {
465 *s = NULL;
466 return NULL;
467 }
468 if (**s == '"') {
469 ++*s;
470 ret = *s;
471 *s = strchr(*s, '"');
472 } else {
473 ret = *s;
474 while (**s && !isspace((unsigned char) **s))
475 (*s)++;
476 }
477 if (*s) {
478 if (**s)
479 *(*s)++ = 0;
480 if (!**s)
481 *s = NULL;
482 }
483 return ret;
484 }
485
486 static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
487 struct imap_cmd_cb *cb,
488 const char *fmt, va_list ap)
489 {
490 struct imap *imap = ctx->imap;
491 struct imap_cmd *cmd;
492 int n;
493 struct strbuf buf = STRBUF_INIT;
494
495 cmd = xmalloc(sizeof(struct imap_cmd));
496 cmd->cmd = xstrvfmt(fmt, ap);
497 cmd->tag = ++imap->nexttag;
498
499 if (cb)
500 cmd->cb = *cb;
501 else
502 memset(&cmd->cb, 0, sizeof(cmd->cb));
503
504 while (imap->literal_pending)
505 get_cmd_result(ctx, NULL);
506
507 if (!cmd->cb.data)
508 strbuf_addf(&buf, "%d %s\r\n", cmd->tag, cmd->cmd);
509 else
510 strbuf_addf(&buf, "%d %s{%d%s}\r\n", cmd->tag, cmd->cmd,
511 cmd->cb.dlen, CAP(LITERALPLUS) ? "+" : "");
512 if (buf.len > INT_MAX)
513 die("imap command overflow!");
514
515 if (0 < verbosity) {
516 if (imap->num_in_progress)
517 printf("(%d in progress) ", imap->num_in_progress);
518 if (!starts_with(cmd->cmd, "LOGIN"))
519 printf(">>> %s", buf.buf);
520 else
521 printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
522 }
523 if (socket_write(&imap->buf.sock, buf.buf, buf.len) != buf.len) {
524 free(cmd->cmd);
525 free(cmd);
526 if (cb)
527 free(cb->data);
528 strbuf_release(&buf);
529 return NULL;
530 }
531 strbuf_release(&buf);
532 if (cmd->cb.data) {
533 if (CAP(LITERALPLUS)) {
534 n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
535 free(cmd->cb.data);
536 if (n != cmd->cb.dlen ||
537 socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
538 free(cmd->cmd);
539 free(cmd);
540 return NULL;
541 }
542 cmd->cb.data = NULL;
543 } else
544 imap->literal_pending = 1;
545 } else if (cmd->cb.cont)
546 imap->literal_pending = 1;
547 cmd->next = NULL;
548 *imap->in_progress_append = cmd;
549 imap->in_progress_append = &cmd->next;
550 imap->num_in_progress++;
551 return cmd;
552 }
553
554 __attribute__((format (printf, 3, 4)))
555 static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
556 const char *fmt, ...)
557 {
558 va_list ap;
559 struct imap_cmd *cmdp;
560
561 va_start(ap, fmt);
562 cmdp = issue_imap_cmd(ctx, cb, fmt, ap);
563 va_end(ap);
564 if (!cmdp)
565 return RESP_BAD;
566
567 return get_cmd_result(ctx, cmdp);
568 }
569
570 __attribute__((format (printf, 3, 4)))
571 static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
572 const char *fmt, ...)
573 {
574 va_list ap;
575 struct imap_cmd *cmdp;
576
577 va_start(ap, fmt);
578 cmdp = issue_imap_cmd(ctx, cb, fmt, ap);
579 va_end(ap);
580 if (!cmdp)
581 return DRV_STORE_BAD;
582
583 switch (get_cmd_result(ctx, cmdp)) {
584 case RESP_BAD: return DRV_STORE_BAD;
585 case RESP_NO: return DRV_MSG_BAD;
586 default: return DRV_OK;
587 }
588 }
589
590 static int skip_imap_list_l(char **sp, int level)
591 {
592 char *s = *sp;
593
594 for (;;) {
595 while (isspace((unsigned char)*s))
596 s++;
597 if (level && *s == ')') {
598 s++;
599 break;
600 }
601 if (*s == '(') {
602 /* sublist */
603 s++;
604 if (skip_imap_list_l(&s, level + 1))
605 goto bail;
606 } else if (*s == '"') {
607 /* quoted string */
608 s++;
609 for (; *s != '"'; s++)
610 if (!*s)
611 goto bail;
612 s++;
613 } else {
614 /* atom */
615 for (; *s && !isspace((unsigned char)*s); s++)
616 if (level && *s == ')')
617 break;
618 }
619
620 if (!level)
621 break;
622 if (!*s)
623 goto bail;
624 }
625 *sp = s;
626 return 0;
627
628 bail:
629 return -1;
630 }
631
632 static void skip_list(char **sp)
633 {
634 skip_imap_list_l(sp, 0);
635 }
636
637 static void parse_capability(struct imap *imap, char *cmd)
638 {
639 char *arg;
640 unsigned i;
641
642 imap->caps = 0x80000000;
643 while ((arg = next_arg(&cmd)))
644 for (i = 0; i < ARRAY_SIZE(cap_list); i++)
645 if (!strcmp(cap_list[i], arg))
646 imap->caps |= 1 << i;
647 imap->rcaps = imap->caps;
648 }
649
650 static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
651 char *s)
652 {
653 struct imap *imap = ctx->imap;
654 char *arg, *p;
655
656 if (!s || *s != '[')
657 return RESP_OK; /* no response code */
658 s++;
659 if (!(p = strchr(s, ']'))) {
660 fprintf(stderr, "IMAP error: malformed response code\n");
661 return RESP_BAD;
662 }
663 *p++ = 0;
664 arg = next_arg(&s);
665 if (!arg) {
666 fprintf(stderr, "IMAP error: empty response code\n");
667 return RESP_BAD;
668 }
669 if (!strcmp("UIDVALIDITY", arg)) {
670 if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg))) {
671 fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
672 return RESP_BAD;
673 }
674 } else if (!strcmp("UIDNEXT", arg)) {
675 if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
676 fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
677 return RESP_BAD;
678 }
679 } else if (!strcmp("CAPABILITY", arg)) {
680 parse_capability(imap, s);
681 } else if (!strcmp("ALERT", arg)) {
682 /* RFC2060 says that these messages MUST be displayed
683 * to the user
684 */
685 for (; isspace((unsigned char)*p); p++);
686 fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
687 } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
688 if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg)) ||
689 !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
690 fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
691 return RESP_BAD;
692 }
693 }
694 return RESP_OK;
695 }
696
697 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
698 {
699 struct imap *imap = ctx->imap;
700 struct imap_cmd *cmdp, **pcmdp;
701 char *cmd;
702 const char *arg, *arg1;
703 int n, resp, resp2, tag;
704
705 for (;;) {
706 if (buffer_gets(&imap->buf, &cmd))
707 return RESP_BAD;
708
709 arg = next_arg(&cmd);
710 if (!arg) {
711 fprintf(stderr, "IMAP error: empty response\n");
712 return RESP_BAD;
713 }
714 if (*arg == '*') {
715 arg = next_arg(&cmd);
716 if (!arg) {
717 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
718 return RESP_BAD;
719 }
720
721 if (!strcmp("NAMESPACE", arg)) {
722 /* rfc2342 NAMESPACE response. */
723 skip_list(&cmd); /* Personal mailboxes */
724 skip_list(&cmd); /* Others' mailboxes */
725 skip_list(&cmd); /* Shared mailboxes */
726 } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
727 !strcmp("NO", arg) || !strcmp("BYE", arg)) {
728 if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
729 return resp;
730 } else if (!strcmp("CAPABILITY", arg)) {
731 parse_capability(imap, cmd);
732 } else if ((arg1 = next_arg(&cmd))) {
733 ; /*
734 * Unhandled response-data with at least two words.
735 * Ignore it.
736 *
737 * NEEDSWORK: Previously this case handled '<num> EXISTS'
738 * and '<num> RECENT' but as a probably-unintended side
739 * effect it ignores other unrecognized two-word
740 * responses. imap-send doesn't ever try to read
741 * messages or mailboxes these days, so consider
742 * eliminating this case.
743 */
744 } else {
745 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
746 return RESP_BAD;
747 }
748 } else if (!imap->in_progress) {
749 fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
750 return RESP_BAD;
751 } else if (*arg == '+') {
752 /* This can happen only with the last command underway, as
753 it enforces a round-trip. */
754 cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
755 offsetof(struct imap_cmd, next));
756 if (cmdp->cb.data) {
757 n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
758 FREE_AND_NULL(cmdp->cb.data);
759 if (n != (int)cmdp->cb.dlen)
760 return RESP_BAD;
761 } else if (cmdp->cb.cont) {
762 if (cmdp->cb.cont(ctx, cmd))
763 return RESP_BAD;
764 } else {
765 fprintf(stderr, "IMAP error: unexpected command continuation request\n");
766 return RESP_BAD;
767 }
768 if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
769 return RESP_BAD;
770 if (!cmdp->cb.cont)
771 imap->literal_pending = 0;
772 if (!tcmd)
773 return DRV_OK;
774 } else {
775 tag = atoi(arg);
776 for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
777 if (cmdp->tag == tag)
778 goto gottag;
779 fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
780 return RESP_BAD;
781 gottag:
782 if (!(*pcmdp = cmdp->next))
783 imap->in_progress_append = pcmdp;
784 imap->num_in_progress--;
785 if (cmdp->cb.cont || cmdp->cb.data)
786 imap->literal_pending = 0;
787 arg = next_arg(&cmd);
788 if (!arg)
789 arg = "";
790 if (!strcmp("OK", arg))
791 resp = DRV_OK;
792 else {
793 if (!strcmp("NO", arg))
794 resp = RESP_NO;
795 else /*if (!strcmp("BAD", arg))*/
796 resp = RESP_BAD;
797 fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
798 !starts_with(cmdp->cmd, "LOGIN") ?
799 cmdp->cmd : "LOGIN <user> <pass>",
800 arg, cmd ? cmd : "");
801 }
802 if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
803 resp = resp2;
804 free(cmdp->cb.data);
805 free(cmdp->cmd);
806 free(cmdp);
807 if (!tcmd || tcmd == cmdp)
808 return resp;
809 }
810 }
811 /* not reached */
812 }
813
814 static void imap_close_server(struct imap_store *ictx)
815 {
816 struct imap *imap = ictx->imap;
817
818 if (imap->buf.sock.fd[0] != -1) {
819 imap_exec(ictx, NULL, "LOGOUT");
820 socket_shutdown(&imap->buf.sock);
821 }
822 free(imap);
823 }
824
825 static void imap_close_store(struct imap_store *ctx)
826 {
827 imap_close_server(ctx);
828 free(ctx);
829 }
830
831 #ifndef NO_OPENSSL
832
833 /*
834 * hexchar() and cram() functions are based on the code from the isync
835 * project (https://isync.sourceforge.io/).
836 */
837 static char hexchar(unsigned int b)
838 {
839 return b < 10 ? '0' + b : 'a' + (b - 10);
840 }
841
842 #define ENCODED_SIZE(n) (4 * DIV_ROUND_UP((n), 3))
843 static char *cram(const char *challenge_64, const char *user, const char *pass)
844 {
845 int i, resp_len, encoded_len, decoded_len;
846 unsigned char hash[16];
847 char hex[33];
848 char *response, *response_64, *challenge;
849
850 /*
851 * length of challenge_64 (i.e. base-64 encoded string) is a good
852 * enough upper bound for challenge (decoded result).
853 */
854 encoded_len = strlen(challenge_64);
855 challenge = xmalloc(encoded_len);
856 decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
857 (unsigned char *)challenge_64, encoded_len);
858 if (decoded_len < 0)
859 die("invalid challenge %s", challenge_64);
860 if (!HMAC(EVP_md5(), pass, strlen(pass), (unsigned char *)challenge, decoded_len, hash, NULL))
861 die("HMAC error");
862
863 hex[32] = 0;
864 for (i = 0; i < 16; i++) {
865 hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
866 hex[2 * i + 1] = hexchar(hash[i] & 0xf);
867 }
868
869 /* response: "<user> <digest in hex>" */
870 response = xstrfmt("%s %s", user, hex);
871 resp_len = strlen(response);
872
873 response_64 = xmallocz(ENCODED_SIZE(resp_len));
874 encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
875 (unsigned char *)response, resp_len);
876 if (encoded_len < 0)
877 die("EVP_EncodeBlock error");
878 return (char *)response_64;
879 }
880
881 #else
882
883 static char *cram(const char *challenge_64 UNUSED,
884 const char *user UNUSED,
885 const char *pass UNUSED)
886 {
887 die("If you want to use CRAM-MD5 authenticate method, "
888 "you have to build git-imap-send with OpenSSL library.");
889 }
890
891 #endif
892
893 static int auth_cram_md5(struct imap_store *ctx, const char *prompt)
894 {
895 int ret;
896 char *response;
897
898 response = cram(prompt, ctx->cfg->user, ctx->cfg->pass);
899
900 ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
901 if (ret != strlen(response))
902 return error("IMAP error: sending response failed");
903
904 free(response);
905
906 return 0;
907 }
908
909 static void server_fill_credential(struct imap_server_conf *srvc, struct credential *cred)
910 {
911 if (srvc->user && srvc->pass)
912 return;
913
914 cred->protocol = xstrdup(srvc->use_ssl ? "imaps" : "imap");
915 cred->host = xstrdup(srvc->host);
916
917 cred->username = xstrdup_or_null(srvc->user);
918 cred->password = xstrdup_or_null(srvc->pass);
919
920 credential_fill(cred, 1);
921
922 if (!srvc->user)
923 srvc->user = xstrdup(cred->username);
924 if (!srvc->pass)
925 srvc->pass = xstrdup(cred->password);
926 }
927
928 static struct imap_store *imap_open_store(struct imap_server_conf *srvc, const char *folder)
929 {
930 struct credential cred = CREDENTIAL_INIT;
931 struct imap_store *ctx;
932 struct imap *imap;
933 char *arg, *rsp;
934 int s = -1, preauth;
935
936 CALLOC_ARRAY(ctx, 1);
937
938 ctx->cfg = srvc;
939 ctx->imap = CALLOC_ARRAY(imap, 1);
940 imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
941 imap->in_progress_append = &imap->in_progress;
942
943 /* open connection to IMAP server */
944
945 if (srvc->tunnel) {
946 struct child_process tunnel = CHILD_PROCESS_INIT;
947
948 imap_info("Starting tunnel '%s'... ", srvc->tunnel);
949
950 strvec_push(&tunnel.args, srvc->tunnel);
951 tunnel.use_shell = 1;
952 tunnel.in = -1;
953 tunnel.out = -1;
954 if (start_command(&tunnel))
955 die("cannot start proxy %s", srvc->tunnel);
956
957 imap->buf.sock.fd[0] = tunnel.out;
958 imap->buf.sock.fd[1] = tunnel.in;
959
960 imap_info("ok\n");
961 } else {
962 #ifndef NO_IPV6
963 struct addrinfo hints, *ai0, *ai;
964 int gai;
965 char portstr[6];
966
967 xsnprintf(portstr, sizeof(portstr), "%d", srvc->port);
968
969 memset(&hints, 0, sizeof(hints));
970 hints.ai_socktype = SOCK_STREAM;
971 hints.ai_protocol = IPPROTO_TCP;
972
973 imap_info("Resolving %s... ", srvc->host);
974 gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
975 if (gai) {
976 fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
977 goto bail;
978 }
979 imap_info("ok\n");
980
981 for (ai0 = ai; ai; ai = ai->ai_next) {
982 char addr[NI_MAXHOST];
983
984 s = socket(ai->ai_family, ai->ai_socktype,
985 ai->ai_protocol);
986 if (s < 0)
987 continue;
988
989 getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
990 sizeof(addr), NULL, 0, NI_NUMERICHOST);
991 imap_info("Connecting to [%s]:%s... ", addr, portstr);
992
993 if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
994 close(s);
995 s = -1;
996 perror("connect");
997 continue;
998 }
999
1000 break;
1001 }
1002 freeaddrinfo(ai0);
1003 #else /* NO_IPV6 */
1004 struct hostent *he;
1005 struct sockaddr_in addr;
1006
1007 memset(&addr, 0, sizeof(addr));
1008 addr.sin_port = htons(srvc->port);
1009 addr.sin_family = AF_INET;
1010
1011 imap_info("Resolving %s... ", srvc->host);
1012 he = gethostbyname(srvc->host);
1013 if (!he) {
1014 perror("gethostbyname");
1015 goto bail;
1016 }
1017 imap_info("ok\n");
1018
1019 addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1020
1021 s = socket(PF_INET, SOCK_STREAM, 0);
1022
1023 imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1024 if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1025 close(s);
1026 s = -1;
1027 perror("connect");
1028 }
1029 #endif
1030 if (s < 0) {
1031 fputs("Error: unable to connect to server.\n", stderr);
1032 goto bail;
1033 }
1034
1035 imap->buf.sock.fd[0] = s;
1036 imap->buf.sock.fd[1] = dup(s);
1037
1038 if (srvc->use_ssl &&
1039 ssl_socket_connect(&imap->buf.sock, srvc, 0)) {
1040 close(s);
1041 goto bail;
1042 }
1043 imap_info("ok\n");
1044 }
1045
1046 /* read the greeting string */
1047 if (buffer_gets(&imap->buf, &rsp)) {
1048 fprintf(stderr, "IMAP error: no greeting response\n");
1049 goto bail;
1050 }
1051 arg = next_arg(&rsp);
1052 if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1053 fprintf(stderr, "IMAP error: invalid greeting response\n");
1054 goto bail;
1055 }
1056 preauth = 0;
1057 if (!strcmp("PREAUTH", arg))
1058 preauth = 1;
1059 else if (strcmp("OK", arg) != 0) {
1060 fprintf(stderr, "IMAP error: unknown greeting response\n");
1061 goto bail;
1062 }
1063 parse_response_code(ctx, NULL, rsp);
1064 if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1065 goto bail;
1066
1067 if (!preauth) {
1068 #ifndef NO_OPENSSL
1069 if (!srvc->use_ssl && CAP(STARTTLS)) {
1070 if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK)
1071 goto bail;
1072 if (ssl_socket_connect(&imap->buf.sock, srvc, 1))
1073 goto bail;
1074 /* capabilities may have changed, so get the new capabilities */
1075 if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1076 goto bail;
1077 }
1078 #endif
1079 imap_info("Logging in...\n");
1080 server_fill_credential(srvc, &cred);
1081
1082 if (srvc->auth_method) {
1083 struct imap_cmd_cb cb;
1084
1085 if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1086 if (!CAP(AUTH_CRAM_MD5)) {
1087 fprintf(stderr, "You specified "
1088 "CRAM-MD5 as authentication method, "
1089 "but %s doesn't support it.\n", srvc->host);
1090 goto bail;
1091 }
1092 /* CRAM-MD5 */
1093
1094 memset(&cb, 0, sizeof(cb));
1095 cb.cont = auth_cram_md5;
1096 if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1097 fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1098 goto bail;
1099 }
1100 } else {
1101 fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1102 goto bail;
1103 }
1104 } else {
1105 if (CAP(NOLOGIN)) {
1106 fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n",
1107 srvc->user, srvc->host);
1108 goto bail;
1109 }
1110 if (!imap->buf.sock.ssl)
1111 imap_warn("*** IMAP Warning *** Password is being "
1112 "sent in the clear\n");
1113 if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1114 fprintf(stderr, "IMAP error: LOGIN failed\n");
1115 goto bail;
1116 }
1117 }
1118 } /* !preauth */
1119
1120 if (cred.username)
1121 credential_approve(&cred);
1122 credential_clear(&cred);
1123
1124 /* check the target mailbox exists */
1125 ctx->name = folder;
1126 switch (imap_exec(ctx, NULL, "EXAMINE \"%s\"", ctx->name)) {
1127 case RESP_OK:
1128 /* ok */
1129 break;
1130 case RESP_BAD:
1131 fprintf(stderr, "IMAP error: could not check mailbox\n");
1132 goto out;
1133 case RESP_NO:
1134 if (imap_exec(ctx, NULL, "CREATE \"%s\"", ctx->name) == RESP_OK) {
1135 imap_info("Created missing mailbox\n");
1136 } else {
1137 fprintf(stderr, "IMAP error: could not create missing mailbox\n");
1138 goto out;
1139 }
1140 break;
1141 }
1142
1143 ctx->prefix = "";
1144 return ctx;
1145
1146 bail:
1147 if (cred.username)
1148 credential_reject(&cred);
1149 credential_clear(&cred);
1150
1151 out:
1152 imap_close_store(ctx);
1153 return NULL;
1154 }
1155
1156 /*
1157 * Insert CR characters as necessary in *msg to ensure that every LF
1158 * character in *msg is preceded by a CR.
1159 */
1160 static void lf_to_crlf(struct strbuf *msg)
1161 {
1162 char *new_msg;
1163 size_t i, j;
1164 char lastc;
1165
1166 /* First pass: tally, in j, the size of the new_msg string: */
1167 for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1168 if (msg->buf[i] == '\n' && lastc != '\r')
1169 j++; /* a CR will need to be added here */
1170 lastc = msg->buf[i];
1171 j++;
1172 }
1173
1174 new_msg = xmallocz(j);
1175
1176 /*
1177 * Second pass: write the new_msg string. Note that this loop is
1178 * otherwise identical to the first pass.
1179 */
1180 for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1181 if (msg->buf[i] == '\n' && lastc != '\r')
1182 new_msg[j++] = '\r';
1183 lastc = new_msg[j++] = msg->buf[i];
1184 }
1185 strbuf_attach(msg, new_msg, j, j + 1);
1186 }
1187
1188 /*
1189 * Store msg to IMAP. Also detach and free the data from msg->data,
1190 * leaving msg->data empty.
1191 */
1192 static int imap_store_msg(struct imap_store *ctx, struct strbuf *msg)
1193 {
1194 struct imap *imap = ctx->imap;
1195 struct imap_cmd_cb cb;
1196 const char *prefix, *box;
1197 int ret;
1198
1199 lf_to_crlf(msg);
1200 memset(&cb, 0, sizeof(cb));
1201
1202 cb.dlen = msg->len;
1203 cb.data = strbuf_detach(msg, NULL);
1204
1205 box = ctx->name;
1206 prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1207 ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" ", prefix, box);
1208 imap->caps = imap->rcaps;
1209 if (ret != DRV_OK)
1210 return ret;
1211
1212 return DRV_OK;
1213 }
1214
1215 static void wrap_in_html(struct strbuf *msg)
1216 {
1217 struct strbuf buf = STRBUF_INIT;
1218 static const char *content_type = "Content-Type: text/html;\n";
1219 static const char *pre_open = "<pre>\n";
1220 static const char *pre_close = "</pre>\n";
1221 const char *body = strstr(msg->buf, "\n\n");
1222
1223 if (!body)
1224 return; /* Headers but no body; no wrapping needed */
1225
1226 body += 2;
1227
1228 strbuf_add(&buf, msg->buf, body - msg->buf - 1);
1229 strbuf_addstr(&buf, content_type);
1230 strbuf_addch(&buf, '\n');
1231 strbuf_addstr(&buf, pre_open);
1232 strbuf_addstr_xml_quoted(&buf, body);
1233 strbuf_addstr(&buf, pre_close);
1234
1235 strbuf_release(msg);
1236 *msg = buf;
1237 }
1238
1239 static int count_messages(struct strbuf *all_msgs)
1240 {
1241 int count = 0;
1242 char *p = all_msgs->buf;
1243
1244 while (1) {
1245 if (starts_with(p, "From ")) {
1246 p = strstr(p+5, "\nFrom: ");
1247 if (!p) break;
1248 p = strstr(p+7, "\nDate: ");
1249 if (!p) break;
1250 p = strstr(p+7, "\nSubject: ");
1251 if (!p) break;
1252 p += 10;
1253 count++;
1254 }
1255 p = strstr(p+5, "\nFrom ");
1256 if (!p)
1257 break;
1258 p++;
1259 }
1260 return count;
1261 }
1262
1263 /*
1264 * Copy the next message from all_msgs, starting at offset *ofs, to
1265 * msg. Update *ofs to the start of the following message. Return
1266 * true iff a message was successfully copied.
1267 */
1268 static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs)
1269 {
1270 char *p, *data;
1271 size_t len;
1272
1273 if (*ofs >= all_msgs->len)
1274 return 0;
1275
1276 data = &all_msgs->buf[*ofs];
1277 len = all_msgs->len - *ofs;
1278
1279 if (len < 5 || !starts_with(data, "From "))
1280 return 0;
1281
1282 p = strchr(data, '\n');
1283 if (p) {
1284 p++;
1285 len -= p - data;
1286 *ofs += p - data;
1287 data = p;
1288 }
1289
1290 p = strstr(data, "\nFrom ");
1291 if (p)
1292 len = &p[1] - data;
1293
1294 strbuf_add(msg, data, len);
1295 *ofs += len;
1296 return 1;
1297 }
1298
1299 static int git_imap_config(const char *var, const char *val,
1300 const struct config_context *ctx, void *cb)
1301 {
1302 struct imap_server_conf *cfg = cb;
1303
1304 if (!strcmp("imap.sslverify", var)) {
1305 cfg->ssl_verify = git_config_bool(var, val);
1306 } else if (!strcmp("imap.preformattedhtml", var)) {
1307 cfg->use_html = git_config_bool(var, val);
1308 } else if (!strcmp("imap.folder", var)) {
1309 FREE_AND_NULL(cfg->folder);
1310 return git_config_string(&cfg->folder, var, val);
1311 } else if (!strcmp("imap.user", var)) {
1312 FREE_AND_NULL(cfg->folder);
1313 return git_config_string(&cfg->user, var, val);
1314 } else if (!strcmp("imap.pass", var)) {
1315 FREE_AND_NULL(cfg->folder);
1316 return git_config_string(&cfg->pass, var, val);
1317 } else if (!strcmp("imap.tunnel", var)) {
1318 FREE_AND_NULL(cfg->folder);
1319 return git_config_string(&cfg->tunnel, var, val);
1320 } else if (!strcmp("imap.authmethod", var)) {
1321 FREE_AND_NULL(cfg->folder);
1322 return git_config_string(&cfg->auth_method, var, val);
1323 } else if (!strcmp("imap.port", var)) {
1324 cfg->port = git_config_int(var, val, ctx->kvi);
1325 } else if (!strcmp("imap.host", var)) {
1326 if (!val) {
1327 return config_error_nonbool(var);
1328 } else {
1329 if (starts_with(val, "imap:"))
1330 val += 5;
1331 else if (starts_with(val, "imaps:")) {
1332 val += 6;
1333 cfg->use_ssl = 1;
1334 }
1335 if (starts_with(val, "//"))
1336 val += 2;
1337 cfg->host = xstrdup(val);
1338 }
1339 } else {
1340 return git_default_config(var, val, ctx, cb);
1341 }
1342
1343 return 0;
1344 }
1345
1346 static int append_msgs_to_imap(struct imap_server_conf *server,
1347 struct strbuf* all_msgs, int total)
1348 {
1349 struct strbuf msg = STRBUF_INIT;
1350 struct imap_store *ctx = NULL;
1351 int ofs = 0;
1352 int r;
1353 int n = 0;
1354
1355 ctx = imap_open_store(server, server->folder);
1356 if (!ctx) {
1357 fprintf(stderr, "failed to open store\n");
1358 return 1;
1359 }
1360 ctx->name = server->folder;
1361
1362 fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1363 while (1) {
1364 unsigned percent = n * 100 / total;
1365
1366 fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1367
1368 if (!split_msg(all_msgs, &msg, &ofs))
1369 break;
1370 if (server->use_html)
1371 wrap_in_html(&msg);
1372 r = imap_store_msg(ctx, &msg);
1373 if (r != DRV_OK)
1374 break;
1375 n++;
1376 }
1377 fprintf(stderr, "\n");
1378
1379 imap_close_store(ctx);
1380
1381 return 0;
1382 }
1383
1384 #ifdef USE_CURL_FOR_IMAP_SEND
1385 static CURL *setup_curl(struct imap_server_conf *srvc, struct credential *cred)
1386 {
1387 CURL *curl;
1388 struct strbuf path = STRBUF_INIT;
1389 char *uri_encoded_folder;
1390
1391 if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
1392 die("curl_global_init failed");
1393
1394 curl = curl_easy_init();
1395
1396 if (!curl)
1397 die("curl_easy_init failed");
1398
1399 server_fill_credential(srvc, cred);
1400 curl_easy_setopt(curl, CURLOPT_USERNAME, srvc->user);
1401 curl_easy_setopt(curl, CURLOPT_PASSWORD, srvc->pass);
1402
1403 strbuf_addstr(&path, srvc->use_ssl ? "imaps://" : "imap://");
1404 strbuf_addstr(&path, srvc->host);
1405 if (!path.len || path.buf[path.len - 1] != '/')
1406 strbuf_addch(&path, '/');
1407
1408 uri_encoded_folder = curl_easy_escape(curl, srvc->folder, 0);
1409 if (!uri_encoded_folder)
1410 die("failed to encode server folder");
1411 strbuf_addstr(&path, uri_encoded_folder);
1412 curl_free(uri_encoded_folder);
1413
1414 curl_easy_setopt(curl, CURLOPT_URL, path.buf);
1415 strbuf_release(&path);
1416 curl_easy_setopt(curl, CURLOPT_PORT, srvc->port);
1417
1418 if (srvc->auth_method) {
1419 #ifndef GIT_CURL_HAVE_CURLOPT_LOGIN_OPTIONS
1420 warning("No LOGIN_OPTIONS support in this cURL version");
1421 #else
1422 struct strbuf auth = STRBUF_INIT;
1423 strbuf_addstr(&auth, "AUTH=");
1424 strbuf_addstr(&auth, srvc->auth_method);
1425 curl_easy_setopt(curl, CURLOPT_LOGIN_OPTIONS, auth.buf);
1426 strbuf_release(&auth);
1427 #endif
1428 }
1429
1430 if (!srvc->use_ssl)
1431 curl_easy_setopt(curl, CURLOPT_USE_SSL, (long)CURLUSESSL_TRY);
1432
1433 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, srvc->ssl_verify);
1434 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, srvc->ssl_verify);
1435
1436 curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
1437
1438 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
1439
1440 if (0 < verbosity || getenv("GIT_CURL_VERBOSE"))
1441 http_trace_curl_no_data();
1442 setup_curl_trace(curl);
1443
1444 return curl;
1445 }
1446
1447 static int curl_append_msgs_to_imap(struct imap_server_conf *server,
1448 struct strbuf* all_msgs, int total)
1449 {
1450 int ofs = 0;
1451 int n = 0;
1452 struct buffer msgbuf = { STRBUF_INIT, 0 };
1453 CURL *curl;
1454 CURLcode res = CURLE_OK;
1455 struct credential cred = CREDENTIAL_INIT;
1456
1457 curl = setup_curl(server, &cred);
1458 curl_easy_setopt(curl, CURLOPT_READDATA, &msgbuf);
1459
1460 fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1461 while (1) {
1462 unsigned percent = n * 100 / total;
1463 int prev_len;
1464
1465 fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1466
1467 prev_len = msgbuf.buf.len;
1468 if (!split_msg(all_msgs, &msgbuf.buf, &ofs))
1469 break;
1470 if (server->use_html)
1471 wrap_in_html(&msgbuf.buf);
1472 lf_to_crlf(&msgbuf.buf);
1473
1474 curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE,
1475 (curl_off_t)(msgbuf.buf.len-prev_len));
1476
1477 res = curl_easy_perform(curl);
1478
1479 if(res != CURLE_OK) {
1480 fprintf(stderr, "curl_easy_perform() failed: %s\n",
1481 curl_easy_strerror(res));
1482 break;
1483 }
1484
1485 n++;
1486 }
1487 fprintf(stderr, "\n");
1488
1489 curl_easy_cleanup(curl);
1490 curl_global_cleanup();
1491
1492 if (cred.username) {
1493 if (res == CURLE_OK)
1494 credential_approve(&cred);
1495 else if (res == CURLE_LOGIN_DENIED)
1496 credential_reject(&cred);
1497 }
1498
1499 credential_clear(&cred);
1500
1501 return res != CURLE_OK;
1502 }
1503 #endif
1504
1505 int cmd_main(int argc, const char **argv)
1506 {
1507 struct imap_server_conf server = {
1508 .ssl_verify = 1,
1509 };
1510 struct strbuf all_msgs = STRBUF_INIT;
1511 int total;
1512 int nongit_ok;
1513 int ret;
1514
1515 setup_git_directory_gently(&nongit_ok);
1516 git_config(git_imap_config, &server);
1517
1518 argc = parse_options(argc, (const char **)argv, "", imap_send_options, imap_send_usage, 0);
1519
1520 if (argc)
1521 usage_with_options(imap_send_usage, imap_send_options);
1522
1523 #ifndef USE_CURL_FOR_IMAP_SEND
1524 if (use_curl) {
1525 warning("--curl not supported in this build");
1526 use_curl = 0;
1527 }
1528 #elif defined(NO_OPENSSL)
1529 if (!use_curl) {
1530 warning("--no-curl not supported in this build");
1531 use_curl = 1;
1532 }
1533 #endif
1534
1535 if (!server.port)
1536 server.port = server.use_ssl ? 993 : 143;
1537
1538 if (!server.folder) {
1539 fprintf(stderr, "no imap store specified\n");
1540 ret = 1;
1541 goto out;
1542 }
1543 if (!server.host) {
1544 if (!server.tunnel) {
1545 fprintf(stderr, "no imap host specified\n");
1546 ret = 1;
1547 goto out;
1548 }
1549 server.host = xstrdup("tunnel");
1550 }
1551
1552 /* read the messages */
1553 if (strbuf_read(&all_msgs, 0, 0) < 0) {
1554 error_errno(_("could not read from stdin"));
1555 ret = 1;
1556 goto out;
1557 }
1558
1559 if (all_msgs.len == 0) {
1560 fprintf(stderr, "nothing to send\n");
1561 ret = 1;
1562 goto out;
1563 }
1564
1565 total = count_messages(&all_msgs);
1566 if (!total) {
1567 fprintf(stderr, "no messages to send\n");
1568 ret = 1;
1569 goto out;
1570 }
1571
1572 /* write it to the imap server */
1573
1574 if (server.tunnel)
1575 ret = append_msgs_to_imap(&server, &all_msgs, total);
1576 #ifdef USE_CURL_FOR_IMAP_SEND
1577 else if (use_curl)
1578 ret = curl_append_msgs_to_imap(&server, &all_msgs, total);
1579 #endif
1580 else
1581 ret = append_msgs_to_imap(&server, &all_msgs, total);
1582
1583 out:
1584 free(server.tunnel);
1585 free(server.host);
1586 free(server.folder);
1587 free(server.user);
1588 free(server.pass);
1589 free(server.auth_method);
1590 strbuf_release(&all_msgs);
1591 return ret;
1592 }
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