git.oblomov.eu Git - git/blob - imap-send.c

   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 "credential.h"
  27 #include "exec_cmd.h"
  28 #include "run-command.h"
  29 #ifdef NO_OPENSSL
  30 typedef void *SSL;
  31 #endif
  32
  33 static const char imap_send_usage[] = "git imap-send < <mbox>";
  34
  35 #undef DRV_OK
  36 #define DRV_OK          0
  37 #define DRV_MSG_BAD     -1
  38 #define DRV_BOX_BAD     -2
  39 #define DRV_STORE_BAD   -3
  40
  41 static int Verbose, Quiet;
  42
  43 __attribute__((format (printf, 1, 2)))
  44 static void imap_info(const char *, ...);
  45 __attribute__((format (printf, 1, 2)))
  46 static void imap_warn(const char *, ...);
  47
  48 static char *next_arg(char **);
  49
  50 __attribute__((format (printf, 3, 4)))
  51 static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
  52
  53 static int nfvasprintf(char **strp, const char *fmt, va_list ap)
  54 {
  55         int len;
  56         char tmp[8192];
  57
  58         len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
  59         if (len < 0)
  60                 die("Fatal: Out of memory");
  61         if (len >= sizeof(tmp))
  62                 die("imap command overflow!");
  63         *strp = xmemdupz(tmp, len);
  64         return len;
  65 }
  66
  67 struct imap_server_conf {
  68         char *name;
  69         char *tunnel;
  70         char *host;
  71         int port;
  72         char *folder;
  73         char *user;
  74         char *pass;
  75         int use_ssl;
  76         int ssl_verify;
  77         int use_html;
  78         char *auth_method;
  79 };
  80
  81 static struct imap_server_conf server = {
  82         NULL,   /* name */
  83         NULL,   /* tunnel */
  84         NULL,   /* host */
  85         0,      /* port */
  86         NULL,   /* folder */
  87         NULL,   /* user */
  88         NULL,   /* pass */
  89         0,      /* use_ssl */
  90         1,      /* ssl_verify */
  91         0,      /* use_html */
  92         NULL,   /* auth_method */
  93 };
  94
  95 struct imap_socket {
  96         int fd[2];
  97         SSL *ssl;
  98 };
  99
 100 struct imap_buffer {
 101         struct imap_socket sock;
 102         int bytes;
 103         int offset;
 104         char buf[1024];
 105 };
 106
 107 struct imap_cmd;
 108
 109 struct imap {
 110         int uidnext; /* from SELECT responses */
 111         unsigned caps, rcaps; /* CAPABILITY results */
 112         /* command queue */
 113         int nexttag, num_in_progress, literal_pending;
 114         struct imap_cmd *in_progress, **in_progress_append;
 115         struct imap_buffer buf; /* this is BIG, so put it last */
 116 };
 117
 118 struct imap_store {
 119         /* currently open mailbox */
 120         const char *name; /* foreign! maybe preset? */
 121         int uidvalidity;
 122         struct imap *imap;
 123         const char *prefix;
 124 };
 125
 126 struct imap_cmd_cb {
 127         int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
 128         void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
 129         void *ctx;
 130         char *data;
 131         int dlen;
 132         int uid;
 133         unsigned create:1, trycreate:1;
 134 };
 135
 136 struct imap_cmd {
 137         struct imap_cmd *next;
 138         struct imap_cmd_cb cb;
 139         char *cmd;
 140         int tag;
 141 };
 142
 143 #define CAP(cap) (imap->caps & (1 << (cap)))
 144
 145 enum CAPABILITY {
 146         NOLOGIN = 0,
 147         UIDPLUS,
 148         LITERALPLUS,
 149         NAMESPACE,
 150         STARTTLS,
 151         AUTH_CRAM_MD5
 152 };
 153
 154 static const char *cap_list[] = {
 155         "LOGINDISABLED",
 156         "UIDPLUS",
 157         "LITERAL+",
 158         "NAMESPACE",
 159         "STARTTLS",
 160         "AUTH=CRAM-MD5",
 161 };
 162
 163 #define RESP_OK    0
 164 #define RESP_NO    1
 165 #define RESP_BAD   2
 166
 167 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
 168
 169
 170 #ifndef NO_OPENSSL
 171 static void ssl_socket_perror(const char *func)
 172 {
 173         fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
 174 }
 175 #endif
 176
 177 static void socket_perror(const char *func, struct imap_socket *sock, int ret)
 178 {
 179 #ifndef NO_OPENSSL
 180         if (sock->ssl) {
 181                 int sslerr = SSL_get_error(sock->ssl, ret);
 182                 switch (sslerr) {
 183                 case SSL_ERROR_NONE:
 184                         break;
 185                 case SSL_ERROR_SYSCALL:
 186                         perror("SSL_connect");
 187                         break;
 188                 default:
 189                         ssl_socket_perror("SSL_connect");
 190                         break;
 191                 }
 192         } else
 193 #endif
 194         {
 195                 if (ret < 0)
 196                         perror(func);
 197                 else
 198                         fprintf(stderr, "%s: unexpected EOF\n", func);
 199         }
 200 }
 201
 202 #ifdef NO_OPENSSL
 203 static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 204 {
 205         fprintf(stderr, "SSL requested but SSL support not compiled in\n");
 206         return -1;
 207 }
 208
 209 #else
 210
 211 static int host_matches(const char *host, const char *pattern)
 212 {
 213         if (pattern[0] == '*' && pattern[1] == '.') {
 214                 pattern += 2;
 215                 if (!(host = strchr(host, '.')))
 216                         return 0;
 217                 host++;
 218         }
 219
 220         return *host && *pattern && !strcasecmp(host, pattern);
 221 }
 222
 223 static int verify_hostname(X509 *cert, const char *hostname)
 224 {
 225         int len;
 226         X509_NAME *subj;
 227         char cname[1000];
 228         int i, found;
 229         STACK_OF(GENERAL_NAME) *subj_alt_names;
 230
 231         /* try the DNS subjectAltNames */
 232         found = 0;
 233         if ((subj_alt_names = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL))) {
 234                 int num_subj_alt_names = sk_GENERAL_NAME_num(subj_alt_names);
 235                 for (i = 0; !found && i < num_subj_alt_names; i++) {
 236                         GENERAL_NAME *subj_alt_name = sk_GENERAL_NAME_value(subj_alt_names, i);
 237                         if (subj_alt_name->type == GEN_DNS &&
 238                             strlen((const char *)subj_alt_name->d.ia5->data) == (size_t)subj_alt_name->d.ia5->length &&
 239                             host_matches(hostname, (const char *)(subj_alt_name->d.ia5->data)))
 240                                 found = 1;
 241                 }
 242                 sk_GENERAL_NAME_pop_free(subj_alt_names, GENERAL_NAME_free);
 243         }
 244         if (found)
 245                 return 0;
 246
 247         /* try the common name */
 248         if (!(subj = X509_get_subject_name(cert)))
 249                 return error("cannot get certificate subject");
 250         if ((len = X509_NAME_get_text_by_NID(subj, NID_commonName, cname, sizeof(cname))) < 0)
 251                 return error("cannot get certificate common name");
 252         if (strlen(cname) == (size_t)len && host_matches(hostname, cname))
 253                 return 0;
 254         return error("certificate owner '%s' does not match hostname '%s'",
 255                      cname, hostname);
 256 }
 257
 258 static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 259 {
 260 #if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
 261         const SSL_METHOD *meth;
 262 #else
 263         SSL_METHOD *meth;
 264 #endif
 265         SSL_CTX *ctx;
 266         int ret;
 267         X509 *cert;
 268
 269         SSL_library_init();
 270         SSL_load_error_strings();
 271
 272         if (use_tls_only)
 273                 meth = TLSv1_method();
 274         else
 275                 meth = SSLv23_method();
 276
 277         if (!meth) {
 278                 ssl_socket_perror("SSLv23_method");
 279                 return -1;
 280         }
 281
 282         ctx = SSL_CTX_new(meth);
 283
 284         if (verify)
 285                 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
 286
 287         if (!SSL_CTX_set_default_verify_paths(ctx)) {
 288                 ssl_socket_perror("SSL_CTX_set_default_verify_paths");
 289                 return -1;
 290         }
 291         sock->ssl = SSL_new(ctx);
 292         if (!sock->ssl) {
 293                 ssl_socket_perror("SSL_new");
 294                 return -1;
 295         }
 296         if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
 297                 ssl_socket_perror("SSL_set_rfd");
 298                 return -1;
 299         }
 300         if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
 301                 ssl_socket_perror("SSL_set_wfd");
 302                 return -1;
 303         }
 304
 305 #ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
 306         /*
 307          * SNI (RFC4366)
 308          * OpenSSL does not document this function, but the implementation
 309          * returns 1 on success, 0 on failure after calling SSLerr().
 310          */
 311         ret = SSL_set_tlsext_host_name(sock->ssl, server.host);
 312         if (ret != 1)
 313                 warning("SSL_set_tlsext_host_name(%s) failed.", server.host);
 314 #endif
 315
 316         ret = SSL_connect(sock->ssl);
 317         if (ret <= 0) {
 318                 socket_perror("SSL_connect", sock, ret);
 319                 return -1;
 320         }
 321
 322         if (verify) {
 323                 /* make sure the hostname matches that of the certificate */
 324                 cert = SSL_get_peer_certificate(sock->ssl);
 325                 if (!cert)
 326                         return error("unable to get peer certificate.");
 327                 if (verify_hostname(cert, server.host) < 0)
 328                         return -1;
 329         }
 330
 331         return 0;
 332 }
 333 #endif
 334
 335 static int socket_read(struct imap_socket *sock, char *buf, int len)
 336 {
 337         ssize_t n;
 338 #ifndef NO_OPENSSL
 339         if (sock->ssl)
 340                 n = SSL_read(sock->ssl, buf, len);
 341         else
 342 #endif
 343                 n = xread(sock->fd[0], buf, len);
 344         if (n <= 0) {
 345                 socket_perror("read", sock, n);
 346                 close(sock->fd[0]);
 347                 close(sock->fd[1]);
 348                 sock->fd[0] = sock->fd[1] = -1;
 349         }
 350         return n;
 351 }
 352
 353 static int socket_write(struct imap_socket *sock, const char *buf, int len)
 354 {
 355         int n;
 356 #ifndef NO_OPENSSL
 357         if (sock->ssl)
 358                 n = SSL_write(sock->ssl, buf, len);
 359         else
 360 #endif
 361                 n = write_in_full(sock->fd[1], buf, len);
 362         if (n != len) {
 363                 socket_perror("write", sock, n);
 364                 close(sock->fd[0]);
 365                 close(sock->fd[1]);
 366                 sock->fd[0] = sock->fd[1] = -1;
 367         }
 368         return n;
 369 }
 370
 371 static void socket_shutdown(struct imap_socket *sock)
 372 {
 373 #ifndef NO_OPENSSL
 374         if (sock->ssl) {
 375                 SSL_shutdown(sock->ssl);
 376                 SSL_free(sock->ssl);
 377         }
 378 #endif
 379         close(sock->fd[0]);
 380         close(sock->fd[1]);
 381 }
 382
 383 /* simple line buffering */
 384 static int buffer_gets(struct imap_buffer *b, char **s)
 385 {
 386         int n;
 387         int start = b->offset;
 388
 389         *s = b->buf + start;
 390
 391         for (;;) {
 392                 /* make sure we have enough data to read the \r\n sequence */
 393                 if (b->offset + 1 >= b->bytes) {
 394                         if (start) {
 395                                 /* shift down used bytes */
 396                                 *s = b->buf;
 397
 398                                 assert(start <= b->bytes);
 399                                 n = b->bytes - start;
 400
 401                                 if (n)
 402                                         memmove(b->buf, b->buf + start, n);
 403                                 b->offset -= start;
 404                                 b->bytes = n;
 405                                 start = 0;
 406                         }
 407
 408                         n = socket_read(&b->sock, b->buf + b->bytes,
 409                                          sizeof(b->buf) - b->bytes);
 410
 411                         if (n <= 0)
 412                                 return -1;
 413
 414                         b->bytes += n;
 415                 }
 416
 417                 if (b->buf[b->offset] == '\r') {
 418                         assert(b->offset + 1 < b->bytes);
 419                         if (b->buf[b->offset + 1] == '\n') {
 420                                 b->buf[b->offset] = 0;  /* terminate the string */
 421                                 b->offset += 2; /* next line */
 422                                 if (Verbose)
 423                                         puts(*s);
 424                                 return 0;
 425                         }
 426                 }
 427
 428                 b->offset++;
 429         }
 430         /* not reached */
 431 }
 432
 433 static void imap_info(const char *msg, ...)
 434 {
 435         va_list va;
 436
 437         if (!Quiet) {
 438                 va_start(va, msg);
 439                 vprintf(msg, va);
 440                 va_end(va);
 441                 fflush(stdout);
 442         }
 443 }
 444
 445 static void imap_warn(const char *msg, ...)
 446 {
 447         va_list va;
 448
 449         if (Quiet < 2) {
 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 int nfsnprintf(char *buf, int blen, const char *fmt, ...)
 487 {
 488         int ret;
 489         va_list va;
 490
 491         va_start(va, fmt);
 492         if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
 493                 die("Fatal: buffer too small. Please report a bug.");
 494         va_end(va);
 495         return ret;
 496 }
 497
 498 static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
 499                                          struct imap_cmd_cb *cb,
 500                                          const char *fmt, va_list ap)
 501 {
 502         struct imap *imap = ctx->imap;
 503         struct imap_cmd *cmd;
 504         int n, bufl;
 505         char buf[1024];
 506
 507         cmd = xmalloc(sizeof(struct imap_cmd));
 508         nfvasprintf(&cmd->cmd, fmt, ap);
 509         cmd->tag = ++imap->nexttag;
 510
 511         if (cb)
 512                 cmd->cb = *cb;
 513         else
 514                 memset(&cmd->cb, 0, sizeof(cmd->cb));
 515
 516         while (imap->literal_pending)
 517                 get_cmd_result(ctx, NULL);
 518
 519         if (!cmd->cb.data)
 520                 bufl = nfsnprintf(buf, sizeof(buf), "%d %s\r\n", cmd->tag, cmd->cmd);
 521         else
 522                 bufl = nfsnprintf(buf, sizeof(buf), "%d %s{%d%s}\r\n",
 523                                   cmd->tag, cmd->cmd, cmd->cb.dlen,
 524                                   CAP(LITERALPLUS) ? "+" : "");
 525
 526         if (Verbose) {
 527                 if (imap->num_in_progress)
 528                         printf("(%d in progress) ", imap->num_in_progress);
 529                 if (!starts_with(cmd->cmd, "LOGIN"))
 530                         printf(">>> %s", buf);
 531                 else
 532                         printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
 533         }
 534         if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
 535                 free(cmd->cmd);
 536                 free(cmd);
 537                 if (cb)
 538                         free(cb->data);
 539                 return NULL;
 540         }
 541         if (cmd->cb.data) {
 542                 if (CAP(LITERALPLUS)) {
 543                         n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
 544                         free(cmd->cb.data);
 545                         if (n != cmd->cb.dlen ||
 546                             socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
 547                                 free(cmd->cmd);
 548                                 free(cmd);
 549                                 return NULL;
 550                         }
 551                         cmd->cb.data = NULL;
 552                 } else
 553                         imap->literal_pending = 1;
 554         } else if (cmd->cb.cont)
 555                 imap->literal_pending = 1;
 556         cmd->next = NULL;
 557         *imap->in_progress_append = cmd;
 558         imap->in_progress_append = &cmd->next;
 559         imap->num_in_progress++;
 560         return cmd;
 561 }
 562
 563 __attribute__((format (printf, 3, 4)))
 564 static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
 565                                        struct imap_cmd_cb *cb,
 566                                        const char *fmt, ...)
 567 {
 568         struct imap_cmd *ret;
 569         va_list ap;
 570
 571         va_start(ap, fmt);
 572         ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
 573         va_end(ap);
 574         return ret;
 575 }
 576
 577 __attribute__((format (printf, 3, 4)))
 578 static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
 579                      const char *fmt, ...)
 580 {
 581         va_list ap;
 582         struct imap_cmd *cmdp;
 583
 584         va_start(ap, fmt);
 585         cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 586         va_end(ap);
 587         if (!cmdp)
 588                 return RESP_BAD;
 589
 590         return get_cmd_result(ctx, cmdp);
 591 }
 592
 593 __attribute__((format (printf, 3, 4)))
 594 static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
 595                        const char *fmt, ...)
 596 {
 597         va_list ap;
 598         struct imap_cmd *cmdp;
 599
 600         va_start(ap, fmt);
 601         cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 602         va_end(ap);
 603         if (!cmdp)
 604                 return DRV_STORE_BAD;
 605
 606         switch (get_cmd_result(ctx, cmdp)) {
 607         case RESP_BAD: return DRV_STORE_BAD;
 608         case RESP_NO: return DRV_MSG_BAD;
 609         default: return DRV_OK;
 610         }
 611 }
 612
 613 static int skip_imap_list_l(char **sp, int level)
 614 {
 615         char *s = *sp;
 616
 617         for (;;) {
 618                 while (isspace((unsigned char)*s))
 619                         s++;
 620                 if (level && *s == ')') {
 621                         s++;
 622                         break;
 623                 }
 624                 if (*s == '(') {
 625                         /* sublist */
 626                         s++;
 627                         if (skip_imap_list_l(&s, level + 1))
 628                                 goto bail;
 629                 } else if (*s == '"') {
 630                         /* quoted string */
 631                         s++;
 632                         for (; *s != '"'; s++)
 633                                 if (!*s)
 634                                         goto bail;
 635                         s++;
 636                 } else {
 637                         /* atom */
 638                         for (; *s && !isspace((unsigned char)*s); s++)
 639                                 if (level && *s == ')')
 640                                         break;
 641                 }
 642
 643                 if (!level)
 644                         break;
 645                 if (!*s)
 646                         goto bail;
 647         }
 648         *sp = s;
 649         return 0;
 650
 651 bail:
 652         return -1;
 653 }
 654
 655 static void skip_list(char **sp)
 656 {
 657         skip_imap_list_l(sp, 0);
 658 }
 659
 660 static void parse_capability(struct imap *imap, char *cmd)
 661 {
 662         char *arg;
 663         unsigned i;
 664
 665         imap->caps = 0x80000000;
 666         while ((arg = next_arg(&cmd)))
 667                 for (i = 0; i < ARRAY_SIZE(cap_list); i++)
 668                         if (!strcmp(cap_list[i], arg))
 669                                 imap->caps |= 1 << i;
 670         imap->rcaps = imap->caps;
 671 }
 672
 673 static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
 674                                char *s)
 675 {
 676         struct imap *imap = ctx->imap;
 677         char *arg, *p;
 678
 679         if (*s != '[')
 680                 return RESP_OK;         /* no response code */
 681         s++;
 682         if (!(p = strchr(s, ']'))) {
 683                 fprintf(stderr, "IMAP error: malformed response code\n");
 684                 return RESP_BAD;
 685         }
 686         *p++ = 0;
 687         arg = next_arg(&s);
 688         if (!strcmp("UIDVALIDITY", arg)) {
 689                 if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg))) {
 690                         fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
 691                         return RESP_BAD;
 692                 }
 693         } else if (!strcmp("UIDNEXT", arg)) {
 694                 if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
 695                         fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
 696                         return RESP_BAD;
 697                 }
 698         } else if (!strcmp("CAPABILITY", arg)) {
 699                 parse_capability(imap, s);
 700         } else if (!strcmp("ALERT", arg)) {
 701                 /* RFC2060 says that these messages MUST be displayed
 702                  * to the user
 703                  */
 704                 for (; isspace((unsigned char)*p); p++);
 705                 fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
 706         } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
 707                 if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg)) ||
 708                     !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
 709                         fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
 710                         return RESP_BAD;
 711                 }
 712         }
 713         return RESP_OK;
 714 }
 715
 716 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
 717 {
 718         struct imap *imap = ctx->imap;
 719         struct imap_cmd *cmdp, **pcmdp, *ncmdp;
 720         char *cmd, *arg, *arg1, *p;
 721         int n, resp, resp2, tag;
 722
 723         for (;;) {
 724                 if (buffer_gets(&imap->buf, &cmd))
 725                         return RESP_BAD;
 726
 727                 arg = next_arg(&cmd);
 728                 if (*arg == '*') {
 729                         arg = next_arg(&cmd);
 730                         if (!arg) {
 731                                 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 732                                 return RESP_BAD;
 733                         }
 734
 735                         if (!strcmp("NAMESPACE", arg)) {
 736                                 /* rfc2342 NAMESPACE response. */
 737                                 skip_list(&cmd); /* Personal mailboxes */
 738                                 skip_list(&cmd); /* Others' mailboxes */
 739                                 skip_list(&cmd); /* Shared mailboxes */
 740                         } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
 741                                    !strcmp("NO", arg) || !strcmp("BYE", arg)) {
 742                                 if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
 743                                         return resp;
 744                         } else if (!strcmp("CAPABILITY", arg)) {
 745                                 parse_capability(imap, cmd);
 746                         } else if ((arg1 = next_arg(&cmd))) {
 747                                 ; /*
 748                                    * Unhandled response-data with at least two words.
 749                                    * Ignore it.
 750                                    *
 751                                    * NEEDSWORK: Previously this case handled '<num> EXISTS'
 752                                    * and '<num> RECENT' but as a probably-unintended side
 753                                    * effect it ignores other unrecognized two-word
 754                                    * responses.  imap-send doesn't ever try to read
 755                                    * messages or mailboxes these days, so consider
 756                                    * eliminating this case.
 757                                    */
 758                         } else {
 759                                 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 760                                 return RESP_BAD;
 761                         }
 762                 } else if (!imap->in_progress) {
 763                         fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
 764                         return RESP_BAD;
 765                 } else if (*arg == '+') {
 766                         /* This can happen only with the last command underway, as
 767                            it enforces a round-trip. */
 768                         cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
 769                                offsetof(struct imap_cmd, next));
 770                         if (cmdp->cb.data) {
 771                                 n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
 772                                 free(cmdp->cb.data);
 773                                 cmdp->cb.data = NULL;
 774                                 if (n != (int)cmdp->cb.dlen)
 775                                         return RESP_BAD;
 776                         } else if (cmdp->cb.cont) {
 777                                 if (cmdp->cb.cont(ctx, cmdp, cmd))
 778                                         return RESP_BAD;
 779                         } else {
 780                                 fprintf(stderr, "IMAP error: unexpected command continuation request\n");
 781                                 return RESP_BAD;
 782                         }
 783                         if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
 784                                 return RESP_BAD;
 785                         if (!cmdp->cb.cont)
 786                                 imap->literal_pending = 0;
 787                         if (!tcmd)
 788                                 return DRV_OK;
 789                 } else {
 790                         tag = atoi(arg);
 791                         for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
 792                                 if (cmdp->tag == tag)
 793                                         goto gottag;
 794                         fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
 795                         return RESP_BAD;
 796                 gottag:
 797                         if (!(*pcmdp = cmdp->next))
 798                                 imap->in_progress_append = pcmdp;
 799                         imap->num_in_progress--;
 800                         if (cmdp->cb.cont || cmdp->cb.data)
 801                                 imap->literal_pending = 0;
 802                         arg = next_arg(&cmd);
 803                         if (!strcmp("OK", arg))
 804                                 resp = DRV_OK;
 805                         else {
 806                                 if (!strcmp("NO", arg)) {
 807                                         if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
 808                                                 p = strchr(cmdp->cmd, '"');
 809                                                 if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", (int)(strchr(p + 1, '"') - p + 1), p)) {
 810                                                         resp = RESP_BAD;
 811                                                         goto normal;
 812                                                 }
 813                                                 /* not waiting here violates the spec, but a server that does not
 814                                                    grok this nonetheless violates it too. */
 815                                                 cmdp->cb.create = 0;
 816                                                 if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
 817                                                         resp = RESP_BAD;
 818                                                         goto normal;
 819                                                 }
 820                                                 free(cmdp->cmd);
 821                                                 free(cmdp);
 822                                                 if (!tcmd)
 823                                                         return 0;       /* ignored */
 824                                                 if (cmdp == tcmd)
 825                                                         tcmd = ncmdp;
 826                                                 continue;
 827                                         }
 828                                         resp = RESP_NO;
 829                                 } else /*if (!strcmp("BAD", arg))*/
 830                                         resp = RESP_BAD;
 831                                 fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
 832                                         !starts_with(cmdp->cmd, "LOGIN") ?
 833                                                         cmdp->cmd : "LOGIN <user> <pass>",
 834                                                         arg, cmd ? cmd : "");
 835                         }
 836                         if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
 837                                 resp = resp2;
 838                 normal:
 839                         if (cmdp->cb.done)
 840                                 cmdp->cb.done(ctx, cmdp, resp);
 841                         free(cmdp->cb.data);
 842                         free(cmdp->cmd);
 843                         free(cmdp);
 844                         if (!tcmd || tcmd == cmdp)
 845                                 return resp;
 846                 }
 847         }
 848         /* not reached */
 849 }
 850
 851 static void imap_close_server(struct imap_store *ictx)
 852 {
 853         struct imap *imap = ictx->imap;
 854
 855         if (imap->buf.sock.fd[0] != -1) {
 856                 imap_exec(ictx, NULL, "LOGOUT");
 857                 socket_shutdown(&imap->buf.sock);
 858         }
 859         free(imap);
 860 }
 861
 862 static void imap_close_store(struct imap_store *ctx)
 863 {
 864         imap_close_server(ctx);
 865         free(ctx);
 866 }
 867
 868 #ifndef NO_OPENSSL
 869
 870 /*
 871  * hexchar() and cram() functions are based on the code from the isync
 872  * project (http://isync.sf.net/).
 873  */
 874 static char hexchar(unsigned int b)
 875 {
 876         return b < 10 ? '0' + b : 'a' + (b - 10);
 877 }
 878
 879 #define ENCODED_SIZE(n) (4*((n+2)/3))
 880 static char *cram(const char *challenge_64, const char *user, const char *pass)
 881 {
 882         int i, resp_len, encoded_len, decoded_len;
 883         HMAC_CTX hmac;
 884         unsigned char hash[16];
 885         char hex[33];
 886         char *response, *response_64, *challenge;
 887
 888         /*
 889          * length of challenge_64 (i.e. base-64 encoded string) is a good
 890          * enough upper bound for challenge (decoded result).
 891          */
 892         encoded_len = strlen(challenge_64);
 893         challenge = xmalloc(encoded_len);
 894         decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
 895                                       (unsigned char *)challenge_64, encoded_len);
 896         if (decoded_len < 0)
 897                 die("invalid challenge %s", challenge_64);
 898         HMAC_Init(&hmac, (unsigned char *)pass, strlen(pass), EVP_md5());
 899         HMAC_Update(&hmac, (unsigned char *)challenge, decoded_len);
 900         HMAC_Final(&hmac, hash, NULL);
 901         HMAC_CTX_cleanup(&hmac);
 902
 903         hex[32] = 0;
 904         for (i = 0; i < 16; i++) {
 905                 hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
 906                 hex[2 * i + 1] = hexchar(hash[i] & 0xf);
 907         }
 908
 909         /* response: "<user> <digest in hex>" */
 910         resp_len = strlen(user) + 1 + strlen(hex) + 1;
 911         response = xmalloc(resp_len);
 912         sprintf(response, "%s %s", user, hex);
 913
 914         response_64 = xmalloc(ENCODED_SIZE(resp_len) + 1);
 915         encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
 916                                       (unsigned char *)response, resp_len);
 917         if (encoded_len < 0)
 918                 die("EVP_EncodeBlock error");
 919         response_64[encoded_len] = '\0';
 920         return (char *)response_64;
 921 }
 922
 923 #else
 924
 925 static char *cram(const char *challenge_64, const char *user, const char *pass)
 926 {
 927         die("If you want to use CRAM-MD5 authenticate method, "
 928             "you have to build git-imap-send with OpenSSL library.");
 929 }
 930
 931 #endif
 932
 933 static int auth_cram_md5(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt)
 934 {
 935         int ret;
 936         char *response;
 937
 938         response = cram(prompt, server.user, server.pass);
 939
 940         ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
 941         if (ret != strlen(response))
 942                 return error("IMAP error: sending response failed");
 943
 944         free(response);
 945
 946         return 0;
 947 }
 948
 949 static struct imap_store *imap_open_store(struct imap_server_conf *srvc)
 950 {
 951         struct credential cred = CREDENTIAL_INIT;
 952         struct imap_store *ctx;
 953         struct imap *imap;
 954         char *arg, *rsp;
 955         int s = -1, preauth;
 956
 957         ctx = xcalloc(1, sizeof(*ctx));
 958
 959         ctx->imap = imap = xcalloc(sizeof(*imap), 1);
 960         imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
 961         imap->in_progress_append = &imap->in_progress;
 962
 963         /* open connection to IMAP server */
 964
 965         if (srvc->tunnel) {
 966                 struct child_process tunnel = {NULL};
 967
 968                 imap_info("Starting tunnel '%s'... ", srvc->tunnel);
 969
 970                 argv_array_push(&tunnel.args, srvc->tunnel);
 971                 tunnel.use_shell = 1;
 972                 tunnel.in = -1;
 973                 tunnel.out = -1;
 974                 if (start_command(&tunnel))
 975                         die("cannot start proxy %s", srvc->tunnel);
 976
 977                 imap->buf.sock.fd[0] = tunnel.out;
 978                 imap->buf.sock.fd[1] = tunnel.in;
 979
 980                 imap_info("ok\n");
 981         } else {
 982 #ifndef NO_IPV6
 983                 struct addrinfo hints, *ai0, *ai;
 984                 int gai;
 985                 char portstr[6];
 986
 987                 snprintf(portstr, sizeof(portstr), "%d", srvc->port);
 988
 989                 memset(&hints, 0, sizeof(hints));
 990                 hints.ai_socktype = SOCK_STREAM;
 991                 hints.ai_protocol = IPPROTO_TCP;
 992
 993                 imap_info("Resolving %s... ", srvc->host);
 994                 gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
 995                 if (gai) {
 996                         fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
 997                         goto bail;
 998                 }
 999                 imap_info("ok\n");
1000
1001                 for (ai0 = ai; ai; ai = ai->ai_next) {
1002                         char addr[NI_MAXHOST];
1003
1004                         s = socket(ai->ai_family, ai->ai_socktype,
1005                                    ai->ai_protocol);
1006                         if (s < 0)
1007                                 continue;
1008
1009                         getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1010                                     sizeof(addr), NULL, 0, NI_NUMERICHOST);
1011                         imap_info("Connecting to [%s]:%s... ", addr, portstr);
1012
1013                         if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1014                                 close(s);
1015                                 s = -1;
1016                                 perror("connect");
1017                                 continue;
1018                         }
1019
1020                         break;
1021                 }
1022                 freeaddrinfo(ai0);
1023 #else /* NO_IPV6 */
1024                 struct hostent *he;
1025                 struct sockaddr_in addr;
1026
1027                 memset(&addr, 0, sizeof(addr));
1028                 addr.sin_port = htons(srvc->port);
1029                 addr.sin_family = AF_INET;
1030
1031                 imap_info("Resolving %s... ", srvc->host);
1032                 he = gethostbyname(srvc->host);
1033                 if (!he) {
1034                         perror("gethostbyname");
1035                         goto bail;
1036                 }
1037                 imap_info("ok\n");
1038
1039                 addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1040
1041                 s = socket(PF_INET, SOCK_STREAM, 0);
1042
1043                 imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1044                 if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1045                         close(s);
1046                         s = -1;
1047                         perror("connect");
1048                 }
1049 #endif
1050                 if (s < 0) {
1051                         fputs("Error: unable to connect to server.\n", stderr);
1052                         goto bail;
1053                 }
1054
1055                 imap->buf.sock.fd[0] = s;
1056                 imap->buf.sock.fd[1] = dup(s);
1057
1058                 if (srvc->use_ssl &&
1059                     ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1060                         close(s);
1061                         goto bail;
1062                 }
1063                 imap_info("ok\n");
1064         }
1065
1066         /* read the greeting string */
1067         if (buffer_gets(&imap->buf, &rsp)) {
1068                 fprintf(stderr, "IMAP error: no greeting response\n");
1069                 goto bail;
1070         }
1071         arg = next_arg(&rsp);
1072         if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1073                 fprintf(stderr, "IMAP error: invalid greeting response\n");
1074                 goto bail;
1075         }
1076         preauth = 0;
1077         if (!strcmp("PREAUTH", arg))
1078                 preauth = 1;
1079         else if (strcmp("OK", arg) != 0) {
1080                 fprintf(stderr, "IMAP error: unknown greeting response\n");
1081                 goto bail;
1082         }
1083         parse_response_code(ctx, NULL, rsp);
1084         if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1085                 goto bail;
1086
1087         if (!preauth) {
1088 #ifndef NO_OPENSSL
1089                 if (!srvc->use_ssl && CAP(STARTTLS)) {
1090                         if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK)
1091                                 goto bail;
1092                         if (ssl_socket_connect(&imap->buf.sock, 1,
1093                                                srvc->ssl_verify))
1094                                 goto bail;
1095                         /* capabilities may have changed, so get the new capabilities */
1096                         if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1097                                 goto bail;
1098                 }
1099 #endif
1100                 imap_info("Logging in...\n");
1101                 if (!srvc->user || !srvc->pass) {
1102                         cred.protocol = xstrdup(srvc->use_ssl ? "imaps" : "imap");
1103                         cred.host = xstrdup(srvc->host);
1104
1105                         if (srvc->user)
1106                                 cred.username = xstrdup(srvc->user);
1107                         if (srvc->pass)
1108                                 cred.password = xstrdup(srvc->pass);
1109
1110                         credential_fill(&cred);
1111
1112                         if (!srvc->user)
1113                                 srvc->user = xstrdup(cred.username);
1114                         if (!srvc->pass)
1115                                 srvc->pass = xstrdup(cred.password);
1116                 }
1117
1118                 if (CAP(NOLOGIN)) {
1119                         fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1120                         goto bail;
1121                 }
1122
1123                 if (srvc->auth_method) {
1124                         struct imap_cmd_cb cb;
1125
1126                         if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1127                                 if (!CAP(AUTH_CRAM_MD5)) {
1128                                         fprintf(stderr, "You specified"
1129                                                 "CRAM-MD5 as authentication method, "
1130                                                 "but %s doesn't support it.\n", srvc->host);
1131                                         goto bail;
1132                                 }
1133                                 /* CRAM-MD5 */
1134
1135                                 memset(&cb, 0, sizeof(cb));
1136                                 cb.cont = auth_cram_md5;
1137                                 if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1138                                         fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1139                                         goto bail;
1140                                 }
1141                         } else {
1142                                 fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1143                                 goto bail;
1144                         }
1145                 } else {
1146                         if (!imap->buf.sock.ssl)
1147                                 imap_warn("*** IMAP Warning *** Password is being "
1148                                           "sent in the clear\n");
1149                         if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1150                                 fprintf(stderr, "IMAP error: LOGIN failed\n");
1151                                 goto bail;
1152                         }
1153                 }
1154         } /* !preauth */
1155
1156         if (cred.username)
1157                 credential_approve(&cred);
1158         credential_clear(&cred);
1159
1160         ctx->prefix = "";
1161         return ctx;
1162
1163 bail:
1164         if (cred.username)
1165                 credential_reject(&cred);
1166         credential_clear(&cred);
1167
1168         imap_close_store(ctx);
1169         return NULL;
1170 }
1171
1172 /*
1173  * Insert CR characters as necessary in *msg to ensure that every LF
1174  * character in *msg is preceded by a CR.
1175  */
1176 static void lf_to_crlf(struct strbuf *msg)
1177 {
1178         char *new;
1179         size_t i, j;
1180         char lastc;
1181
1182         /* First pass: tally, in j, the size of the new string: */
1183         for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1184                 if (msg->buf[i] == '\n' && lastc != '\r')
1185                         j++; /* a CR will need to be added here */
1186                 lastc = msg->buf[i];
1187                 j++;
1188         }
1189
1190         new = xmalloc(j + 1);
1191
1192         /*
1193          * Second pass: write the new string.  Note that this loop is
1194          * otherwise identical to the first pass.
1195          */
1196         for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1197                 if (msg->buf[i] == '\n' && lastc != '\r')
1198                         new[j++] = '\r';
1199                 lastc = new[j++] = msg->buf[i];
1200         }
1201         strbuf_attach(msg, new, j, j + 1);
1202 }
1203
1204 /*
1205  * Store msg to IMAP.  Also detach and free the data from msg->data,
1206  * leaving msg->data empty.
1207  */
1208 static int imap_store_msg(struct imap_store *ctx, struct strbuf *msg)
1209 {
1210         struct imap *imap = ctx->imap;
1211         struct imap_cmd_cb cb;
1212         const char *prefix, *box;
1213         int ret;
1214
1215         lf_to_crlf(msg);
1216         memset(&cb, 0, sizeof(cb));
1217
1218         cb.dlen = msg->len;
1219         cb.data = strbuf_detach(msg, NULL);
1220
1221         box = ctx->name;
1222         prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1223         cb.create = 0;
1224         ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" ", prefix, box);
1225         imap->caps = imap->rcaps;
1226         if (ret != DRV_OK)
1227                 return ret;
1228
1229         return DRV_OK;
1230 }
1231
1232 static void wrap_in_html(struct strbuf *msg)
1233 {
1234         struct strbuf buf = STRBUF_INIT;
1235         static char *content_type = "Content-Type: text/html;\n";
1236         static char *pre_open = "<pre>\n";
1237         static char *pre_close = "</pre>\n";
1238         const char *body = strstr(msg->buf, "\n\n");
1239
1240         if (!body)
1241                 return; /* Headers but no body; no wrapping needed */
1242
1243         body += 2;
1244
1245         strbuf_add(&buf, msg->buf, body - msg->buf - 1);
1246         strbuf_addstr(&buf, content_type);
1247         strbuf_addch(&buf, '\n');
1248         strbuf_addstr(&buf, pre_open);
1249         strbuf_addstr_xml_quoted(&buf, body);
1250         strbuf_addstr(&buf, pre_close);
1251
1252         strbuf_release(msg);
1253         *msg = buf;
1254 }
1255
1256 #define CHUNKSIZE 0x1000
1257
1258 static int read_message(FILE *f, struct strbuf *all_msgs)
1259 {
1260         do {
1261                 if (strbuf_fread(all_msgs, CHUNKSIZE, f) <= 0)
1262                         break;
1263         } while (!feof(f));
1264
1265         return ferror(f) ? -1 : 0;
1266 }
1267
1268 static int count_messages(struct strbuf *all_msgs)
1269 {
1270         int count = 0;
1271         char *p = all_msgs->buf;
1272
1273         while (1) {
1274                 if (starts_with(p, "From ")) {
1275                         p = strstr(p+5, "\nFrom: ");
1276                         if (!p) break;
1277                         p = strstr(p+7, "\nDate: ");
1278                         if (!p) break;
1279                         p = strstr(p+7, "\nSubject: ");
1280                         if (!p) break;
1281                         p += 10;
1282                         count++;
1283                 }
1284                 p = strstr(p+5, "\nFrom ");
1285                 if (!p)
1286                         break;
1287                 p++;
1288         }
1289         return count;
1290 }
1291
1292 /*
1293  * Copy the next message from all_msgs, starting at offset *ofs, to
1294  * msg.  Update *ofs to the start of the following message.  Return
1295  * true iff a message was successfully copied.
1296  */
1297 static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs)
1298 {
1299         char *p, *data;
1300         size_t len;
1301
1302         if (*ofs >= all_msgs->len)
1303                 return 0;
1304
1305         data = &all_msgs->buf[*ofs];
1306         len = all_msgs->len - *ofs;
1307
1308         if (len < 5 || !starts_with(data, "From "))
1309                 return 0;
1310
1311         p = strchr(data, '\n');
1312         if (p) {
1313                 p++;
1314                 len -= p - data;
1315                 *ofs += p - data;
1316                 data = p;
1317         }
1318
1319         p = strstr(data, "\nFrom ");
1320         if (p)
1321                 len = &p[1] - data;
1322
1323         strbuf_add(msg, data, len);
1324         *ofs += len;
1325         return 1;
1326 }
1327
1328 static int git_imap_config(const char *key, const char *val, void *cb)
1329 {
1330         if (!skip_prefix(key, "imap.", &key))
1331                 return 0;
1332
1333         /* check booleans first, and barf on others */
1334         if (!strcmp("sslverify", key))
1335                 server.ssl_verify = git_config_bool(key, val);
1336         else if (!strcmp("preformattedhtml", key))
1337                 server.use_html = git_config_bool(key, val);
1338         else if (!val)
1339                 return config_error_nonbool(key);
1340
1341         if (!strcmp("folder", key)) {
1342                 server.folder = xstrdup(val);
1343         } else if (!strcmp("host", key)) {
1344                 if (starts_with(val, "imap:"))
1345                         val += 5;
1346                 else if (starts_with(val, "imaps:")) {
1347                         val += 6;
1348                         server.use_ssl = 1;
1349                 }
1350                 if (starts_with(val, "//"))
1351                         val += 2;
1352                 server.host = xstrdup(val);
1353         } else if (!strcmp("user", key))
1354                 server.user = xstrdup(val);
1355         else if (!strcmp("pass", key))
1356                 server.pass = xstrdup(val);
1357         else if (!strcmp("port", key))
1358                 server.port = git_config_int(key, val);
1359         else if (!strcmp("tunnel", key))
1360                 server.tunnel = xstrdup(val);
1361         else if (!strcmp("authmethod", key))
1362                 server.auth_method = xstrdup(val);
1363
1364         return 0;
1365 }
1366
1367 int main(int argc, char **argv)
1368 {
1369         struct strbuf all_msgs = STRBUF_INIT;
1370         struct strbuf msg = STRBUF_INIT;
1371         struct imap_store *ctx = NULL;
1372         int ofs = 0;
1373         int r;
1374         int total, n = 0;
1375         int nongit_ok;
1376
1377         git_extract_argv0_path(argv[0]);
1378
1379         git_setup_gettext();
1380
1381         if (argc != 1)
1382                 usage(imap_send_usage);
1383
1384         setup_git_directory_gently(&nongit_ok);
1385         git_config(git_imap_config, NULL);
1386
1387         if (!server.port)
1388                 server.port = server.use_ssl ? 993 : 143;
1389
1390         if (!server.folder) {
1391                 fprintf(stderr, "no imap store specified\n");
1392                 return 1;
1393         }
1394         if (!server.host) {
1395                 if (!server.tunnel) {
1396                         fprintf(stderr, "no imap host specified\n");
1397                         return 1;
1398                 }
1399                 server.host = "tunnel";
1400         }
1401
1402         /* read the messages */
1403         if (read_message(stdin, &all_msgs)) {
1404                 fprintf(stderr, "error reading input\n");
1405                 return 1;
1406         }
1407
1408         if (all_msgs.len == 0) {
1409                 fprintf(stderr, "nothing to send\n");
1410                 return 1;
1411         }
1412
1413         total = count_messages(&all_msgs);
1414         if (!total) {
1415                 fprintf(stderr, "no messages to send\n");
1416                 return 1;
1417         }
1418
1419         /* write it to the imap server */
1420         ctx = imap_open_store(&server);
1421         if (!ctx) {
1422                 fprintf(stderr, "failed to open store\n");
1423                 return 1;
1424         }
1425
1426         fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1427         ctx->name = server.folder;
1428         while (1) {
1429                 unsigned percent = n * 100 / total;
1430
1431                 fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1432                 if (!split_msg(&all_msgs, &msg, &ofs))
1433                         break;
1434                 if (server.use_html)
1435                         wrap_in_html(&msg);
1436                 r = imap_store_msg(ctx, &msg);
1437                 if (r != DRV_OK)
1438                         break;
1439                 n++;
1440         }
1441         fprintf(stderr, "\n");
1442
1443         imap_close_store(ctx);
1444
1445         return 0;
1446 }