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   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 *user;
  73         char *pass;
  74         int use_ssl;
  75         int ssl_verify;
  76         int use_html;
  77         char *auth_method;
  78 };
  79
  80 static struct imap_server_conf server = {
  81         NULL,   /* name */
  82         NULL,   /* tunnel */
  83         NULL,   /* host */
  84         0,      /* port */
  85         NULL,   /* user */
  86         NULL,   /* pass */
  87         0,      /* use_ssl */
  88         1,      /* ssl_verify */
  89         0,      /* use_html */
  90         NULL,   /* auth_method */
  91 };
  92
  93 struct imap_socket {
  94         int fd[2];
  95         SSL *ssl;
  96 };
  97
  98 struct imap_buffer {
  99         struct imap_socket sock;
 100         int bytes;
 101         int offset;
 102         char buf[1024];
 103 };
 104
 105 struct imap_cmd;
 106
 107 struct imap {
 108         int uidnext; /* from SELECT responses */
 109         unsigned caps, rcaps; /* CAPABILITY results */
 110         /* command queue */
 111         int nexttag, num_in_progress, literal_pending;
 112         struct imap_cmd *in_progress, **in_progress_append;
 113         struct imap_buffer buf; /* this is BIG, so put it last */
 114 };
 115
 116 struct imap_store {
 117         /* currently open mailbox */
 118         const char *name; /* foreign! maybe preset? */
 119         int uidvalidity;
 120         struct imap *imap;
 121         const char *prefix;
 122 };
 123
 124 struct imap_cmd_cb {
 125         int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
 126         void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
 127         void *ctx;
 128         char *data;
 129         int dlen;
 130         int uid;
 131         unsigned create:1, trycreate:1;
 132 };
 133
 134 struct imap_cmd {
 135         struct imap_cmd *next;
 136         struct imap_cmd_cb cb;
 137         char *cmd;
 138         int tag;
 139 };
 140
 141 #define CAP(cap) (imap->caps & (1 << (cap)))
 142
 143 enum CAPABILITY {
 144         NOLOGIN = 0,
 145         UIDPLUS,
 146         LITERALPLUS,
 147         NAMESPACE,
 148         STARTTLS,
 149         AUTH_CRAM_MD5
 150 };
 151
 152 static const char *cap_list[] = {
 153         "LOGINDISABLED",
 154         "UIDPLUS",
 155         "LITERAL+",
 156         "NAMESPACE",
 157         "STARTTLS",
 158         "AUTH=CRAM-MD5",
 159 };
 160
 161 #define RESP_OK    0
 162 #define RESP_NO    1
 163 #define RESP_BAD   2
 164
 165 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
 166
 167
 168 #ifndef NO_OPENSSL
 169 static void ssl_socket_perror(const char *func)
 170 {
 171         fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
 172 }
 173 #endif
 174
 175 static void socket_perror(const char *func, struct imap_socket *sock, int ret)
 176 {
 177 #ifndef NO_OPENSSL
 178         if (sock->ssl) {
 179                 int sslerr = SSL_get_error(sock->ssl, ret);
 180                 switch (sslerr) {
 181                 case SSL_ERROR_NONE:
 182                         break;
 183                 case SSL_ERROR_SYSCALL:
 184                         perror("SSL_connect");
 185                         break;
 186                 default:
 187                         ssl_socket_perror("SSL_connect");
 188                         break;
 189                 }
 190         } else
 191 #endif
 192         {
 193                 if (ret < 0)
 194                         perror(func);
 195                 else
 196                         fprintf(stderr, "%s: unexpected EOF\n", func);
 197         }
 198 }
 199
 200 #ifdef NO_OPENSSL
 201 static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 202 {
 203         fprintf(stderr, "SSL requested but SSL support not compiled in\n");
 204         return -1;
 205 }
 206
 207 #else
 208
 209 static int host_matches(const char *host, const char *pattern)
 210 {
 211         if (pattern[0] == '*' && pattern[1] == '.') {
 212                 pattern += 2;
 213                 if (!(host = strchr(host, '.')))
 214                         return 0;
 215                 host++;
 216         }
 217
 218         return *host && *pattern && !strcasecmp(host, pattern);
 219 }
 220
 221 static int verify_hostname(X509 *cert, const char *hostname)
 222 {
 223         int len;
 224         X509_NAME *subj;
 225         char cname[1000];
 226         int i, found;
 227         STACK_OF(GENERAL_NAME) *subj_alt_names;
 228
 229         /* try the DNS subjectAltNames */
 230         found = 0;
 231         if ((subj_alt_names = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL))) {
 232                 int num_subj_alt_names = sk_GENERAL_NAME_num(subj_alt_names);
 233                 for (i = 0; !found && i < num_subj_alt_names; i++) {
 234                         GENERAL_NAME *subj_alt_name = sk_GENERAL_NAME_value(subj_alt_names, i);
 235                         if (subj_alt_name->type == GEN_DNS &&
 236                             strlen((const char *)subj_alt_name->d.ia5->data) == (size_t)subj_alt_name->d.ia5->length &&
 237                             host_matches(hostname, (const char *)(subj_alt_name->d.ia5->data)))
 238                                 found = 1;
 239                 }
 240                 sk_GENERAL_NAME_pop_free(subj_alt_names, GENERAL_NAME_free);
 241         }
 242         if (found)
 243                 return 0;
 244
 245         /* try the common name */
 246         if (!(subj = X509_get_subject_name(cert)))
 247                 return error("cannot get certificate subject");
 248         if ((len = X509_NAME_get_text_by_NID(subj, NID_commonName, cname, sizeof(cname))) < 0)
 249                 return error("cannot get certificate common name");
 250         if (strlen(cname) == (size_t)len && host_matches(hostname, cname))
 251                 return 0;
 252         return error("certificate owner '%s' does not match hostname '%s'",
 253                      cname, hostname);
 254 }
 255
 256 static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 257 {
 258 #if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
 259         const SSL_METHOD *meth;
 260 #else
 261         SSL_METHOD *meth;
 262 #endif
 263         SSL_CTX *ctx;
 264         int ret;
 265         X509 *cert;
 266
 267         SSL_library_init();
 268         SSL_load_error_strings();
 269
 270         if (use_tls_only)
 271                 meth = TLSv1_method();
 272         else
 273                 meth = SSLv23_method();
 274
 275         if (!meth) {
 276                 ssl_socket_perror("SSLv23_method");
 277                 return -1;
 278         }
 279
 280         ctx = SSL_CTX_new(meth);
 281
 282         if (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, server.host);
 310         if (ret != 1)
 311                 warning("SSL_set_tlsext_host_name(%s) failed.", server.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 (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, server.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 (Verbose)
 421                                         puts(*s);
 422                                 return 0;
 423                         }
 424                 }
 425
 426                 b->offset++;
 427         }
 428         /* not reached */
 429 }
 430
 431 static void imap_info(const char *msg, ...)
 432 {
 433         va_list va;
 434
 435         if (!Quiet) {
 436                 va_start(va, msg);
 437                 vprintf(msg, va);
 438                 va_end(va);
 439                 fflush(stdout);
 440         }
 441 }
 442
 443 static void imap_warn(const char *msg, ...)
 444 {
 445         va_list va;
 446
 447         if (Quiet < 2) {
 448                 va_start(va, msg);
 449                 vfprintf(stderr, msg, va);
 450                 va_end(va);
 451         }
 452 }
 453
 454 static char *next_arg(char **s)
 455 {
 456         char *ret;
 457
 458         if (!s || !*s)
 459                 return NULL;
 460         while (isspace((unsigned char) **s))
 461                 (*s)++;
 462         if (!**s) {
 463                 *s = NULL;
 464                 return NULL;
 465         }
 466         if (**s == '"') {
 467                 ++*s;
 468                 ret = *s;
 469                 *s = strchr(*s, '"');
 470         } else {
 471                 ret = *s;
 472                 while (**s && !isspace((unsigned char) **s))
 473                         (*s)++;
 474         }
 475         if (*s) {
 476                 if (**s)
 477                         *(*s)++ = 0;
 478                 if (!**s)
 479                         *s = NULL;
 480         }
 481         return ret;
 482 }
 483
 484 static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
 485 {
 486         int ret;
 487         va_list va;
 488
 489         va_start(va, fmt);
 490         if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
 491                 die("Fatal: buffer too small. Please report a bug.");
 492         va_end(va);
 493         return ret;
 494 }
 495
 496 static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
 497                                          struct imap_cmd_cb *cb,
 498                                          const char *fmt, va_list ap)
 499 {
 500         struct imap *imap = ctx->imap;
 501         struct imap_cmd *cmd;
 502         int n, bufl;
 503         char buf[1024];
 504
 505         cmd = xmalloc(sizeof(struct imap_cmd));
 506         nfvasprintf(&cmd->cmd, fmt, ap);
 507         cmd->tag = ++imap->nexttag;
 508
 509         if (cb)
 510                 cmd->cb = *cb;
 511         else
 512                 memset(&cmd->cb, 0, sizeof(cmd->cb));
 513
 514         while (imap->literal_pending)
 515                 get_cmd_result(ctx, NULL);
 516
 517         if (!cmd->cb.data)
 518                 bufl = nfsnprintf(buf, sizeof(buf), "%d %s\r\n", cmd->tag, cmd->cmd);
 519         else
 520                 bufl = nfsnprintf(buf, sizeof(buf), "%d %s{%d%s}\r\n",
 521                                   cmd->tag, cmd->cmd, cmd->cb.dlen,
 522                                   CAP(LITERALPLUS) ? "+" : "");
 523
 524         if (Verbose) {
 525                 if (imap->num_in_progress)
 526                         printf("(%d in progress) ", imap->num_in_progress);
 527                 if (memcmp(cmd->cmd, "LOGIN", 5))
 528                         printf(">>> %s", buf);
 529                 else
 530                         printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
 531         }
 532         if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
 533                 free(cmd->cmd);
 534                 free(cmd);
 535                 if (cb)
 536                         free(cb->data);
 537                 return NULL;
 538         }
 539         if (cmd->cb.data) {
 540                 if (CAP(LITERALPLUS)) {
 541                         n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
 542                         free(cmd->cb.data);
 543                         if (n != cmd->cb.dlen ||
 544                             socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
 545                                 free(cmd->cmd);
 546                                 free(cmd);
 547                                 return NULL;
 548                         }
 549                         cmd->cb.data = NULL;
 550                 } else
 551                         imap->literal_pending = 1;
 552         } else if (cmd->cb.cont)
 553                 imap->literal_pending = 1;
 554         cmd->next = NULL;
 555         *imap->in_progress_append = cmd;
 556         imap->in_progress_append = &cmd->next;
 557         imap->num_in_progress++;
 558         return cmd;
 559 }
 560
 561 __attribute__((format (printf, 3, 4)))
 562 static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
 563                                        struct imap_cmd_cb *cb,
 564                                        const char *fmt, ...)
 565 {
 566         struct imap_cmd *ret;
 567         va_list ap;
 568
 569         va_start(ap, fmt);
 570         ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
 571         va_end(ap);
 572         return ret;
 573 }
 574
 575 __attribute__((format (printf, 3, 4)))
 576 static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
 577                      const char *fmt, ...)
 578 {
 579         va_list ap;
 580         struct imap_cmd *cmdp;
 581
 582         va_start(ap, fmt);
 583         cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 584         va_end(ap);
 585         if (!cmdp)
 586                 return RESP_BAD;
 587
 588         return get_cmd_result(ctx, cmdp);
 589 }
 590
 591 __attribute__((format (printf, 3, 4)))
 592 static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
 593                        const char *fmt, ...)
 594 {
 595         va_list ap;
 596         struct imap_cmd *cmdp;
 597
 598         va_start(ap, fmt);
 599         cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 600         va_end(ap);
 601         if (!cmdp)
 602                 return DRV_STORE_BAD;
 603
 604         switch (get_cmd_result(ctx, cmdp)) {
 605         case RESP_BAD: return DRV_STORE_BAD;
 606         case RESP_NO: return DRV_MSG_BAD;
 607         default: return DRV_OK;
 608         }
 609 }
 610
 611 static int skip_imap_list_l(char **sp, int level)
 612 {
 613         char *s = *sp;
 614
 615         for (;;) {
 616                 while (isspace((unsigned char)*s))
 617                         s++;
 618                 if (level && *s == ')') {
 619                         s++;
 620                         break;
 621                 }
 622                 if (*s == '(') {
 623                         /* sublist */
 624                         s++;
 625                         if (skip_imap_list_l(&s, level + 1))
 626                                 goto bail;
 627                 } else if (*s == '"') {
 628                         /* quoted string */
 629                         s++;
 630                         for (; *s != '"'; s++)
 631                                 if (!*s)
 632                                         goto bail;
 633                         s++;
 634                 } else {
 635                         /* atom */
 636                         for (; *s && !isspace((unsigned char)*s); s++)
 637                                 if (level && *s == ')')
 638                                         break;
 639                 }
 640
 641                 if (!level)
 642                         break;
 643                 if (!*s)
 644                         goto bail;
 645         }
 646         *sp = s;
 647         return 0;
 648
 649 bail:
 650         return -1;
 651 }
 652
 653 static void skip_list(char **sp)
 654 {
 655         skip_imap_list_l(sp, 0);
 656 }
 657
 658 static void parse_capability(struct imap *imap, char *cmd)
 659 {
 660         char *arg;
 661         unsigned i;
 662
 663         imap->caps = 0x80000000;
 664         while ((arg = next_arg(&cmd)))
 665                 for (i = 0; i < ARRAY_SIZE(cap_list); i++)
 666                         if (!strcmp(cap_list[i], arg))
 667                                 imap->caps |= 1 << i;
 668         imap->rcaps = imap->caps;
 669 }
 670
 671 static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
 672                                char *s)
 673 {
 674         struct imap *imap = ctx->imap;
 675         char *arg, *p;
 676
 677         if (*s != '[')
 678                 return RESP_OK;         /* no response code */
 679         s++;
 680         if (!(p = strchr(s, ']'))) {
 681                 fprintf(stderr, "IMAP error: malformed response code\n");
 682                 return RESP_BAD;
 683         }
 684         *p++ = 0;
 685         arg = next_arg(&s);
 686         if (!strcmp("UIDVALIDITY", arg)) {
 687                 if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg))) {
 688                         fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
 689                         return RESP_BAD;
 690                 }
 691         } else if (!strcmp("UIDNEXT", arg)) {
 692                 if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
 693                         fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
 694                         return RESP_BAD;
 695                 }
 696         } else if (!strcmp("CAPABILITY", arg)) {
 697                 parse_capability(imap, s);
 698         } else if (!strcmp("ALERT", arg)) {
 699                 /* RFC2060 says that these messages MUST be displayed
 700                  * to the user
 701                  */
 702                 for (; isspace((unsigned char)*p); p++);
 703                 fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
 704         } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
 705                 if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg)) ||
 706                     !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
 707                         fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
 708                         return RESP_BAD;
 709                 }
 710         }
 711         return RESP_OK;
 712 }
 713
 714 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
 715 {
 716         struct imap *imap = ctx->imap;
 717         struct imap_cmd *cmdp, **pcmdp, *ncmdp;
 718         char *cmd, *arg, *arg1, *p;
 719         int n, resp, resp2, tag;
 720
 721         for (;;) {
 722                 if (buffer_gets(&imap->buf, &cmd))
 723                         return RESP_BAD;
 724
 725                 arg = next_arg(&cmd);
 726                 if (*arg == '*') {
 727                         arg = next_arg(&cmd);
 728                         if (!arg) {
 729                                 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 730                                 return RESP_BAD;
 731                         }
 732
 733                         if (!strcmp("NAMESPACE", arg)) {
 734                                 /* rfc2342 NAMESPACE response. */
 735                                 skip_list(&cmd); /* Personal mailboxes */
 736                                 skip_list(&cmd); /* Others' mailboxes */
 737                                 skip_list(&cmd); /* Shared mailboxes */
 738                         } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
 739                                    !strcmp("NO", arg) || !strcmp("BYE", arg)) {
 740                                 if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
 741                                         return resp;
 742                         } else if (!strcmp("CAPABILITY", arg)) {
 743                                 parse_capability(imap, cmd);
 744                         } else if ((arg1 = next_arg(&cmd))) {
 745                                 ; /*
 746                                    * Unhandled response-data with at least two words.
 747                                    * Ignore it.
 748                                    *
 749                                    * NEEDSWORK: Previously this case handled '<num> EXISTS'
 750                                    * and '<num> RECENT' but as a probably-unintended side
 751                                    * effect it ignores other unrecognized two-word
 752                                    * responses.  imap-send doesn't ever try to read
 753                                    * messages or mailboxes these days, so consider
 754                                    * eliminating this case.
 755                                    */
 756                         } else {
 757                                 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 758                                 return RESP_BAD;
 759                         }
 760                 } else if (!imap->in_progress) {
 761                         fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
 762                         return RESP_BAD;
 763                 } else if (*arg == '+') {
 764                         /* This can happen only with the last command underway, as
 765                            it enforces a round-trip. */
 766                         cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
 767                                offsetof(struct imap_cmd, next));
 768                         if (cmdp->cb.data) {
 769                                 n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
 770                                 free(cmdp->cb.data);
 771                                 cmdp->cb.data = NULL;
 772                                 if (n != (int)cmdp->cb.dlen)
 773                                         return RESP_BAD;
 774                         } else if (cmdp->cb.cont) {
 775                                 if (cmdp->cb.cont(ctx, cmdp, cmd))
 776                                         return RESP_BAD;
 777                         } else {
 778                                 fprintf(stderr, "IMAP error: unexpected command continuation request\n");
 779                                 return RESP_BAD;
 780                         }
 781                         if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
 782                                 return RESP_BAD;
 783                         if (!cmdp->cb.cont)
 784                                 imap->literal_pending = 0;
 785                         if (!tcmd)
 786                                 return DRV_OK;
 787                 } else {
 788                         tag = atoi(arg);
 789                         for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
 790                                 if (cmdp->tag == tag)
 791                                         goto gottag;
 792                         fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
 793                         return RESP_BAD;
 794                 gottag:
 795                         if (!(*pcmdp = cmdp->next))
 796                                 imap->in_progress_append = pcmdp;
 797                         imap->num_in_progress--;
 798                         if (cmdp->cb.cont || cmdp->cb.data)
 799                                 imap->literal_pending = 0;
 800                         arg = next_arg(&cmd);
 801                         if (!strcmp("OK", arg))
 802                                 resp = DRV_OK;
 803                         else {
 804                                 if (!strcmp("NO", arg)) {
 805                                         if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
 806                                                 p = strchr(cmdp->cmd, '"');
 807                                                 if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", (int)(strchr(p + 1, '"') - p + 1), p)) {
 808                                                         resp = RESP_BAD;
 809                                                         goto normal;
 810                                                 }
 811                                                 /* not waiting here violates the spec, but a server that does not
 812                                                    grok this nonetheless violates it too. */
 813                                                 cmdp->cb.create = 0;
 814                                                 if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
 815                                                         resp = RESP_BAD;
 816                                                         goto normal;
 817                                                 }
 818                                                 free(cmdp->cmd);
 819                                                 free(cmdp);
 820                                                 if (!tcmd)
 821                                                         return 0;       /* ignored */
 822                                                 if (cmdp == tcmd)
 823                                                         tcmd = ncmdp;
 824                                                 continue;
 825                                         }
 826                                         resp = RESP_NO;
 827                                 } else /*if (!strcmp("BAD", arg))*/
 828                                         resp = RESP_BAD;
 829                                 fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
 830                                          memcmp(cmdp->cmd, "LOGIN", 5) ?
 831                                                         cmdp->cmd : "LOGIN <user> <pass>",
 832                                                         arg, cmd ? cmd : "");
 833                         }
 834                         if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
 835                                 resp = resp2;
 836                 normal:
 837                         if (cmdp->cb.done)
 838                                 cmdp->cb.done(ctx, cmdp, resp);
 839                         free(cmdp->cb.data);
 840                         free(cmdp->cmd);
 841                         free(cmdp);
 842                         if (!tcmd || tcmd == cmdp)
 843                                 return resp;
 844                 }
 845         }
 846         /* not reached */
 847 }
 848
 849 static void imap_close_server(struct imap_store *ictx)
 850 {
 851         struct imap *imap = ictx->imap;
 852
 853         if (imap->buf.sock.fd[0] != -1) {
 854                 imap_exec(ictx, NULL, "LOGOUT");
 855                 socket_shutdown(&imap->buf.sock);
 856         }
 857         free(imap);
 858 }
 859
 860 static void imap_close_store(struct imap_store *ctx)
 861 {
 862         imap_close_server(ctx);
 863         free(ctx);
 864 }
 865
 866 #ifndef NO_OPENSSL
 867
 868 /*
 869  * hexchar() and cram() functions are based on the code from the isync
 870  * project (http://isync.sf.net/).
 871  */
 872 static char hexchar(unsigned int b)
 873 {
 874         return b < 10 ? '0' + b : 'a' + (b - 10);
 875 }
 876
 877 #define ENCODED_SIZE(n) (4*((n+2)/3))
 878 static char *cram(const char *challenge_64, const char *user, const char *pass)
 879 {
 880         int i, resp_len, encoded_len, decoded_len;
 881         HMAC_CTX hmac;
 882         unsigned char hash[16];
 883         char hex[33];
 884         char *response, *response_64, *challenge;
 885
 886         /*
 887          * length of challenge_64 (i.e. base-64 encoded string) is a good
 888          * enough upper bound for challenge (decoded result).
 889          */
 890         encoded_len = strlen(challenge_64);
 891         challenge = xmalloc(encoded_len);
 892         decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
 893                                       (unsigned char *)challenge_64, encoded_len);
 894         if (decoded_len < 0)
 895                 die("invalid challenge %s", challenge_64);
 896         HMAC_Init(&hmac, (unsigned char *)pass, strlen(pass), EVP_md5());
 897         HMAC_Update(&hmac, (unsigned char *)challenge, decoded_len);
 898         HMAC_Final(&hmac, hash, NULL);
 899         HMAC_CTX_cleanup(&hmac);
 900
 901         hex[32] = 0;
 902         for (i = 0; i < 16; i++) {
 903                 hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
 904                 hex[2 * i + 1] = hexchar(hash[i] & 0xf);
 905         }
 906
 907         /* response: "<user> <digest in hex>" */
 908         resp_len = strlen(user) + 1 + strlen(hex) + 1;
 909         response = xmalloc(resp_len);
 910         sprintf(response, "%s %s", user, hex);
 911
 912         response_64 = xmalloc(ENCODED_SIZE(resp_len) + 1);
 913         encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
 914                                       (unsigned char *)response, resp_len);
 915         if (encoded_len < 0)
 916                 die("EVP_EncodeBlock error");
 917         response_64[encoded_len] = '\0';
 918         return (char *)response_64;
 919 }
 920
 921 #else
 922
 923 static char *cram(const char *challenge_64, const char *user, const char *pass)
 924 {
 925         die("If you want to use CRAM-MD5 authenticate method, "
 926             "you have to build git-imap-send with OpenSSL library.");
 927 }
 928
 929 #endif
 930
 931 static int auth_cram_md5(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt)
 932 {
 933         int ret;
 934         char *response;
 935
 936         response = cram(prompt, server.user, server.pass);
 937
 938         ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
 939         if (ret != strlen(response))
 940                 return error("IMAP error: sending response failed");
 941
 942         free(response);
 943
 944         return 0;
 945 }
 946
 947 static struct imap_store *imap_open_store(struct imap_server_conf *srvc)
 948 {
 949         struct credential cred = CREDENTIAL_INIT;
 950         struct imap_store *ctx;
 951         struct imap *imap;
 952         char *arg, *rsp;
 953         int s = -1, preauth;
 954
 955         ctx = xcalloc(1, sizeof(*ctx));
 956
 957         ctx->imap = imap = xcalloc(sizeof(*imap), 1);
 958         imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
 959         imap->in_progress_append = &imap->in_progress;
 960
 961         /* open connection to IMAP server */
 962
 963         if (srvc->tunnel) {
 964                 const char *argv[] = { srvc->tunnel, NULL };
 965                 struct child_process tunnel = {NULL};
 966
 967                 imap_info("Starting tunnel '%s'... ", srvc->tunnel);
 968
 969                 tunnel.argv = argv;
 970                 tunnel.use_shell = 1;
 971                 tunnel.in = -1;
 972                 tunnel.out = -1;
 973                 if (start_command(&tunnel))
 974                         die("cannot start proxy %s", argv[0]);
 975
 976                 imap->buf.sock.fd[0] = tunnel.out;
 977                 imap->buf.sock.fd[1] = tunnel.in;
 978
 979                 imap_info("ok\n");
 980         } else {
 981 #ifndef NO_IPV6
 982                 struct addrinfo hints, *ai0, *ai;
 983                 int gai;
 984                 char portstr[6];
 985
 986                 snprintf(portstr, sizeof(portstr), "%d", srvc->port);
 987
 988                 memset(&hints, 0, sizeof(hints));
 989                 hints.ai_socktype = SOCK_STREAM;
 990                 hints.ai_protocol = IPPROTO_TCP;
 991
 992                 imap_info("Resolving %s... ", srvc->host);
 993                 gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
 994                 if (gai) {
 995                         fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
 996                         goto bail;
 997                 }
 998                 imap_info("ok\n");
 999
1000                 for (ai0 = ai; ai; ai = ai->ai_next) {
1001                         char addr[NI_MAXHOST];
1002
1003                         s = socket(ai->ai_family, ai->ai_socktype,
1004                                    ai->ai_protocol);
1005                         if (s < 0)
1006                                 continue;
1007
1008                         getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1009                                     sizeof(addr), NULL, 0, NI_NUMERICHOST);
1010                         imap_info("Connecting to [%s]:%s... ", addr, portstr);
1011
1012                         if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1013                                 close(s);
1014                                 s = -1;
1015                                 perror("connect");
1016                                 continue;
1017                         }
1018
1019                         break;
1020                 }
1021                 freeaddrinfo(ai0);
1022 #else /* NO_IPV6 */
1023                 struct hostent *he;
1024                 struct sockaddr_in addr;
1025
1026                 memset(&addr, 0, sizeof(addr));
1027                 addr.sin_port = htons(srvc->port);
1028                 addr.sin_family = AF_INET;
1029
1030                 imap_info("Resolving %s... ", srvc->host);
1031                 he = gethostbyname(srvc->host);
1032                 if (!he) {
1033                         perror("gethostbyname");
1034                         goto bail;
1035                 }
1036                 imap_info("ok\n");
1037
1038                 addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1039
1040                 s = socket(PF_INET, SOCK_STREAM, 0);
1041
1042                 imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1043                 if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1044                         close(s);
1045                         s = -1;
1046                         perror("connect");
1047                 }
1048 #endif
1049                 if (s < 0) {
1050                         fputs("Error: unable to connect to server.\n", stderr);
1051                         goto bail;
1052                 }
1053
1054                 imap->buf.sock.fd[0] = s;
1055                 imap->buf.sock.fd[1] = dup(s);
1056
1057                 if (srvc->use_ssl &&
1058                     ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1059                         close(s);
1060                         goto bail;
1061                 }
1062                 imap_info("ok\n");
1063         }
1064
1065         /* read the greeting string */
1066         if (buffer_gets(&imap->buf, &rsp)) {
1067                 fprintf(stderr, "IMAP error: no greeting response\n");
1068                 goto bail;
1069         }
1070         arg = next_arg(&rsp);
1071         if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1072                 fprintf(stderr, "IMAP error: invalid greeting response\n");
1073                 goto bail;
1074         }
1075         preauth = 0;
1076         if (!strcmp("PREAUTH", arg))
1077                 preauth = 1;
1078         else if (strcmp("OK", arg) != 0) {
1079                 fprintf(stderr, "IMAP error: unknown greeting response\n");
1080                 goto bail;
1081         }
1082         parse_response_code(ctx, NULL, rsp);
1083         if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1084                 goto bail;
1085
1086         if (!preauth) {
1087 #ifndef NO_OPENSSL
1088                 if (!srvc->use_ssl && CAP(STARTTLS)) {
1089                         if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK)
1090                                 goto bail;
1091                         if (ssl_socket_connect(&imap->buf.sock, 1,
1092                                                srvc->ssl_verify))
1093                                 goto bail;
1094                         /* capabilities may have changed, so get the new capabilities */
1095                         if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1096                                 goto bail;
1097                 }
1098 #endif
1099                 imap_info("Logging in...\n");
1100                 if (!srvc->user || !srvc->pass) {
1101                         cred.protocol = xstrdup(srvc->use_ssl ? "imaps" : "imap");
1102                         cred.host = xstrdup(srvc->host);
1103
1104                         if (srvc->user)
1105                                 cred.username = xstrdup(srvc->user);
1106                         if (srvc->pass)
1107                                 cred.password = xstrdup(srvc->pass);
1108
1109                         credential_fill(&cred);
1110
1111                         if (!srvc->user)
1112                                 srvc->user = xstrdup(cred.username);
1113                         if (!srvc->pass)
1114                                 srvc->pass = xstrdup(cred.password);
1115                 }
1116
1117                 if (CAP(NOLOGIN)) {
1118                         fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1119                         goto bail;
1120                 }
1121
1122                 if (srvc->auth_method) {
1123                         struct imap_cmd_cb cb;
1124
1125                         if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1126                                 if (!CAP(AUTH_CRAM_MD5)) {
1127                                         fprintf(stderr, "You specified"
1128                                                 "CRAM-MD5 as authentication method, "
1129                                                 "but %s doesn't support it.\n", srvc->host);
1130                                         goto bail;
1131                                 }
1132                                 /* CRAM-MD5 */
1133
1134                                 memset(&cb, 0, sizeof(cb));
1135                                 cb.cont = auth_cram_md5;
1136                                 if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1137                                         fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1138                                         goto bail;
1139                                 }
1140                         } else {
1141                                 fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1142                                 goto bail;
1143                         }
1144                 } else {
1145                         if (!imap->buf.sock.ssl)
1146                                 imap_warn("*** IMAP Warning *** Password is being "
1147                                           "sent in the clear\n");
1148                         if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1149                                 fprintf(stderr, "IMAP error: LOGIN failed\n");
1150                                 goto bail;
1151                         }
1152                 }
1153         } /* !preauth */
1154
1155         if (cred.username)
1156                 credential_approve(&cred);
1157         credential_clear(&cred);
1158
1159         ctx->prefix = "";
1160         return ctx;
1161
1162 bail:
1163         if (cred.username)
1164                 credential_reject(&cred);
1165         credential_clear(&cred);
1166
1167         imap_close_store(ctx);
1168         return NULL;
1169 }
1170
1171 /*
1172  * Insert CR characters as necessary in *msg to ensure that every LF
1173  * character in *msg is preceded by a CR.
1174  */
1175 static void lf_to_crlf(struct strbuf *msg)
1176 {
1177         char *new;
1178         size_t i, j;
1179         char lastc;
1180
1181         /* First pass: tally, in j, the size of the new string: */
1182         for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1183                 if (msg->buf[i] == '\n' && lastc != '\r')
1184                         j++; /* a CR will need to be added here */
1185                 lastc = msg->buf[i];
1186                 j++;
1187         }
1188
1189         new = xmalloc(j + 1);
1190
1191         /*
1192          * Second pass: write the new string.  Note that this loop is
1193          * otherwise identical to the first pass.
1194          */
1195         for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1196                 if (msg->buf[i] == '\n' && lastc != '\r')
1197                         new[j++] = '\r';
1198                 lastc = new[j++] = msg->buf[i];
1199         }
1200         strbuf_attach(msg, new, j, j + 1);
1201 }
1202
1203 /*
1204  * Store msg to IMAP.  Also detach and free the data from msg->data,
1205  * leaving msg->data empty.
1206  */
1207 static int imap_store_msg(struct imap_store *ctx, struct strbuf *msg)
1208 {
1209         struct imap *imap = ctx->imap;
1210         struct imap_cmd_cb cb;
1211         const char *prefix, *box;
1212         int ret;
1213
1214         lf_to_crlf(msg);
1215         memset(&cb, 0, sizeof(cb));
1216
1217         cb.dlen = msg->len;
1218         cb.data = strbuf_detach(msg, NULL);
1219
1220         box = ctx->name;
1221         prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1222         cb.create = 0;
1223         ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" ", prefix, box);
1224         imap->caps = imap->rcaps;
1225         if (ret != DRV_OK)
1226                 return ret;
1227
1228         return DRV_OK;
1229 }
1230
1231 static void wrap_in_html(struct strbuf *msg)
1232 {
1233         struct strbuf buf = STRBUF_INIT;
1234         static char *content_type = "Content-Type: text/html;\n";
1235         static char *pre_open = "<pre>\n";
1236         static char *pre_close = "</pre>\n";
1237         const char *body = strstr(msg->buf, "\n\n");
1238
1239         if (!body)
1240                 return; /* Headers but no body; no wrapping needed */
1241
1242         body += 2;
1243
1244         strbuf_add(&buf, msg->buf, body - msg->buf - 1);
1245         strbuf_addstr(&buf, content_type);
1246         strbuf_addch(&buf, '\n');
1247         strbuf_addstr(&buf, pre_open);
1248         strbuf_addstr_xml_quoted(&buf, body);
1249         strbuf_addstr(&buf, pre_close);
1250
1251         strbuf_release(msg);
1252         *msg = buf;
1253 }
1254
1255 #define CHUNKSIZE 0x1000
1256
1257 static int read_message(FILE *f, struct strbuf *all_msgs)
1258 {
1259         do {
1260                 if (strbuf_fread(all_msgs, CHUNKSIZE, f) <= 0)
1261                         break;
1262         } while (!feof(f));
1263
1264         return ferror(f) ? -1 : 0;
1265 }
1266
1267 static int count_messages(struct strbuf *all_msgs)
1268 {
1269         int count = 0;
1270         char *p = all_msgs->buf;
1271
1272         while (1) {
1273                 if (starts_with(p, "From ")) {
1274                         p = strstr(p+5, "\nFrom: ");
1275                         if (!p) break;
1276                         p = strstr(p+7, "\nDate: ");
1277                         if (!p) break;
1278                         p = strstr(p+7, "\nSubject: ");
1279                         if (!p) break;
1280                         p += 10;
1281                         count++;
1282                 }
1283                 p = strstr(p+5, "\nFrom ");
1284                 if (!p)
1285                         break;
1286                 p++;
1287         }
1288         return count;
1289 }
1290
1291 /*
1292  * Copy the next message from all_msgs, starting at offset *ofs, to
1293  * msg.  Update *ofs to the start of the following message.  Return
1294  * true iff a message was successfully copied.
1295  */
1296 static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs)
1297 {
1298         char *p, *data;
1299         size_t len;
1300
1301         if (*ofs >= all_msgs->len)
1302                 return 0;
1303
1304         data = &all_msgs->buf[*ofs];
1305         len = all_msgs->len - *ofs;
1306
1307         if (len < 5 || !starts_with(data, "From "))
1308                 return 0;
1309
1310         p = strchr(data, '\n');
1311         if (p) {
1312                 p++;
1313                 len -= p - data;
1314                 *ofs += p - data;
1315                 data = p;
1316         }
1317
1318         p = strstr(data, "\nFrom ");
1319         if (p)
1320                 len = &p[1] - data;
1321
1322         strbuf_add(msg, data, len);
1323         *ofs += len;
1324         return 1;
1325 }
1326
1327 static char *imap_folder;
1328
1329 static int git_imap_config(const char *key, const char *val, void *cb)
1330 {
1331         if (!skip_prefix(key, "imap.", &key))
1332                 return 0;
1333
1334         /* check booleans first, and barf on others */
1335         if (!strcmp("sslverify", key))
1336                 server.ssl_verify = git_config_bool(key, val);
1337         else if (!strcmp("preformattedhtml", key))
1338                 server.use_html = git_config_bool(key, val);
1339         else if (!val)
1340                 return config_error_nonbool(key);
1341
1342         if (!strcmp("folder", key)) {
1343                 imap_folder = xstrdup(val);
1344         } else if (!strcmp("host", key)) {
1345                 if (starts_with(val, "imap:"))
1346                         val += 5;
1347                 else if (starts_with(val, "imaps:")) {
1348                         val += 6;
1349                         server.use_ssl = 1;
1350                 }
1351                 if (starts_with(val, "//"))
1352                         val += 2;
1353                 server.host = xstrdup(val);
1354         } else if (!strcmp("user", key))
1355                 server.user = xstrdup(val);
1356         else if (!strcmp("pass", key))
1357                 server.pass = xstrdup(val);
1358         else if (!strcmp("port", key))
1359                 server.port = git_config_int(key, val);
1360         else if (!strcmp("tunnel", key))
1361                 server.tunnel = xstrdup(val);
1362         else if (!strcmp("authmethod", key))
1363                 server.auth_method = xstrdup(val);
1364
1365         return 0;
1366 }
1367
1368 int main(int argc, char **argv)
1369 {
1370         struct strbuf all_msgs = STRBUF_INIT;
1371         struct strbuf msg = STRBUF_INIT;
1372         struct imap_store *ctx = NULL;
1373         int ofs = 0;
1374         int r;
1375         int total, n = 0;
1376         int nongit_ok;
1377
1378         git_extract_argv0_path(argv[0]);
1379
1380         git_setup_gettext();
1381
1382         if (argc != 1)
1383                 usage(imap_send_usage);
1384
1385         setup_git_directory_gently(&nongit_ok);
1386         git_config(git_imap_config, NULL);
1387
1388         if (!server.port)
1389                 server.port = server.use_ssl ? 993 : 143;
1390
1391         if (!imap_folder) {
1392                 fprintf(stderr, "no imap store specified\n");
1393                 return 1;
1394         }
1395         if (!server.host) {
1396                 if (!server.tunnel) {
1397                         fprintf(stderr, "no imap host specified\n");
1398                         return 1;
1399                 }
1400                 server.host = "tunnel";
1401         }
1402
1403         /* read the messages */
1404         if (read_message(stdin, &all_msgs)) {
1405                 fprintf(stderr, "error reading input\n");
1406                 return 1;
1407         }
1408
1409         if (all_msgs.len == 0) {
1410                 fprintf(stderr, "nothing to send\n");
1411                 return 1;
1412         }
1413
1414         total = count_messages(&all_msgs);
1415         if (!total) {
1416                 fprintf(stderr, "no messages to send\n");
1417                 return 1;
1418         }
1419
1420         /* write it to the imap server */
1421         ctx = imap_open_store(&server);
1422         if (!ctx) {
1423                 fprintf(stderr, "failed to open store\n");
1424                 return 1;
1425         }
1426
1427         fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1428         ctx->name = imap_folder;
1429         while (1) {
1430                 unsigned percent = n * 100 / total;
1431
1432                 fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1433                 if (!split_msg(&all_msgs, &msg, &ofs))
1434                         break;
1435                 if (server.use_html)
1436                         wrap_in_html(&msg);
1437                 r = imap_store_msg(ctx, &msg);
1438                 if (r != DRV_OK)
1439                         break;
1440                 n++;
1441         }
1442         fprintf(stderr, "\n");
1443
1444         imap_close_store(ctx);
1445
1446         return 0;
1447 }