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 "exec_cmd.h"
  27 #include "run-command.h"
  28 #include "prompt.h"
  29 #ifdef NO_OPENSSL
  30 typedef void *SSL;
  31 #else
  32 #include <openssl/evp.h>
  33 #include <openssl/hmac.h>
  34 #include <openssl/x509v3.h>
  35 #endif
  36
  37 static const char imap_send_usage[] = "git imap-send < <mbox>";
  38
  39 #undef DRV_OK
  40 #define DRV_OK          0
  41 #define DRV_MSG_BAD     -1
  42 #define DRV_BOX_BAD     -2
  43 #define DRV_STORE_BAD   -3
  44
  45 static int Verbose, Quiet;
  46
  47 __attribute__((format (printf, 1, 2)))
  48 static void imap_info(const char *, ...);
  49 __attribute__((format (printf, 1, 2)))
  50 static void imap_warn(const char *, ...);
  51
  52 static char *next_arg(char **);
  53
  54 __attribute__((format (printf, 3, 4)))
  55 static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
  56
  57 static int nfvasprintf(char **strp, const char *fmt, va_list ap)
  58 {
  59         int len;
  60         char tmp[8192];
  61
  62         len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
  63         if (len < 0)
  64                 die("Fatal: Out of memory");
  65         if (len >= sizeof(tmp))
  66                 die("imap command overflow!");
  67         *strp = xmemdupz(tmp, len);
  68         return len;
  69 }
  70
  71 struct imap_server_conf {
  72         char *name;
  73         char *tunnel;
  74         char *host;
  75         int port;
  76         char *user;
  77         char *pass;
  78         int use_ssl;
  79         int ssl_verify;
  80         int use_html;
  81         char *auth_method;
  82 };
  83
  84 static struct imap_server_conf server = {
  85         NULL,   /* name */
  86         NULL,   /* tunnel */
  87         NULL,   /* host */
  88         0,      /* port */
  89         NULL,   /* user */
  90         NULL,   /* pass */
  91         0,      /* use_ssl */
  92         1,      /* ssl_verify */
  93         0,      /* use_html */
  94         NULL,   /* auth_method */
  95 };
  96
  97 struct imap_socket {
  98         int fd[2];
  99         SSL *ssl;
 100 };
 101
 102 struct imap_buffer {
 103         struct imap_socket sock;
 104         int bytes;
 105         int offset;
 106         char buf[1024];
 107 };
 108
 109 struct imap_cmd;
 110
 111 struct imap {
 112         int uidnext; /* from SELECT responses */
 113         unsigned caps, rcaps; /* CAPABILITY results */
 114         /* command queue */
 115         int nexttag, num_in_progress, literal_pending;
 116         struct imap_cmd *in_progress, **in_progress_append;
 117         struct imap_buffer buf; /* this is BIG, so put it last */
 118 };
 119
 120 struct imap_store {
 121         /* currently open mailbox */
 122         const char *name; /* foreign! maybe preset? */
 123         int uidvalidity;
 124         struct imap *imap;
 125         const char *prefix;
 126 };
 127
 128 struct imap_cmd_cb {
 129         int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
 130         void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
 131         void *ctx;
 132         char *data;
 133         int dlen;
 134         int uid;
 135         unsigned create:1, trycreate:1;
 136 };
 137
 138 struct imap_cmd {
 139         struct imap_cmd *next;
 140         struct imap_cmd_cb cb;
 141         char *cmd;
 142         int tag;
 143 };
 144
 145 #define CAP(cap) (imap->caps & (1 << (cap)))
 146
 147 enum CAPABILITY {
 148         NOLOGIN = 0,
 149         UIDPLUS,
 150         LITERALPLUS,
 151         NAMESPACE,
 152         STARTTLS,
 153         AUTH_CRAM_MD5
 154 };
 155
 156 static const char *cap_list[] = {
 157         "LOGINDISABLED",
 158         "UIDPLUS",
 159         "LITERAL+",
 160         "NAMESPACE",
 161         "STARTTLS",
 162         "AUTH=CRAM-MD5",
 163 };
 164
 165 #define RESP_OK    0
 166 #define RESP_NO    1
 167 #define RESP_BAD   2
 168
 169 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
 170
 171
 172 #ifndef NO_OPENSSL
 173 static void ssl_socket_perror(const char *func)
 174 {
 175         fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
 176 }
 177 #endif
 178
 179 static void socket_perror(const char *func, struct imap_socket *sock, int ret)
 180 {
 181 #ifndef NO_OPENSSL
 182         if (sock->ssl) {
 183                 int sslerr = SSL_get_error(sock->ssl, ret);
 184                 switch (sslerr) {
 185                 case SSL_ERROR_NONE:
 186                         break;
 187                 case SSL_ERROR_SYSCALL:
 188                         perror("SSL_connect");
 189                         break;
 190                 default:
 191                         ssl_socket_perror("SSL_connect");
 192                         break;
 193                 }
 194         } else
 195 #endif
 196         {
 197                 if (ret < 0)
 198                         perror(func);
 199                 else
 200                         fprintf(stderr, "%s: unexpected EOF\n", func);
 201         }
 202 }
 203
 204 #ifdef NO_OPENSSL
 205 static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 206 {
 207         fprintf(stderr, "SSL requested but SSL support not compiled in\n");
 208         return -1;
 209 }
 210
 211 #else
 212
 213 static int host_matches(const char *host, const char *pattern)
 214 {
 215         if (pattern[0] == '*' && pattern[1] == '.') {
 216                 pattern += 2;
 217                 if (!(host = strchr(host, '.')))
 218                         return 0;
 219                 host++;
 220         }
 221
 222         return *host && *pattern && !strcasecmp(host, pattern);
 223 }
 224
 225 static int verify_hostname(X509 *cert, const char *hostname)
 226 {
 227         int len;
 228         X509_NAME *subj;
 229         char cname[1000];
 230         int i, found;
 231         STACK_OF(GENERAL_NAME) *subj_alt_names;
 232
 233         /* try the DNS subjectAltNames */
 234         found = 0;
 235         if ((subj_alt_names = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL))) {
 236                 int num_subj_alt_names = sk_GENERAL_NAME_num(subj_alt_names);
 237                 for (i = 0; !found && i < num_subj_alt_names; i++) {
 238                         GENERAL_NAME *subj_alt_name = sk_GENERAL_NAME_value(subj_alt_names, i);
 239                         if (subj_alt_name->type == GEN_DNS &&
 240                             strlen((const char *)subj_alt_name->d.ia5->data) == (size_t)subj_alt_name->d.ia5->length &&
 241                             host_matches(hostname, (const char *)(subj_alt_name->d.ia5->data)))
 242                                 found = 1;
 243                 }
 244                 sk_GENERAL_NAME_pop_free(subj_alt_names, GENERAL_NAME_free);
 245         }
 246         if (found)
 247                 return 0;
 248
 249         /* try the common name */
 250         if (!(subj = X509_get_subject_name(cert)))
 251                 return error("cannot get certificate subject");
 252         if ((len = X509_NAME_get_text_by_NID(subj, NID_commonName, cname, sizeof(cname))) < 0)
 253                 return error("cannot get certificate common name");
 254         if (strlen(cname) == (size_t)len && host_matches(hostname, cname))
 255                 return 0;
 256         return error("certificate owner '%s' does not match hostname '%s'",
 257                      cname, hostname);
 258 }
 259
 260 static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 261 {
 262 #if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
 263         const SSL_METHOD *meth;
 264 #else
 265         SSL_METHOD *meth;
 266 #endif
 267         SSL_CTX *ctx;
 268         int ret;
 269         X509 *cert;
 270
 271         SSL_library_init();
 272         SSL_load_error_strings();
 273
 274         if (use_tls_only)
 275                 meth = TLSv1_method();
 276         else
 277                 meth = SSLv23_method();
 278
 279         if (!meth) {
 280                 ssl_socket_perror("SSLv23_method");
 281                 return -1;
 282         }
 283
 284         ctx = SSL_CTX_new(meth);
 285
 286         if (verify)
 287                 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
 288
 289         if (!SSL_CTX_set_default_verify_paths(ctx)) {
 290                 ssl_socket_perror("SSL_CTX_set_default_verify_paths");
 291                 return -1;
 292         }
 293         sock->ssl = SSL_new(ctx);
 294         if (!sock->ssl) {
 295                 ssl_socket_perror("SSL_new");
 296                 return -1;
 297         }
 298         if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
 299                 ssl_socket_perror("SSL_set_rfd");
 300                 return -1;
 301         }
 302         if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
 303                 ssl_socket_perror("SSL_set_wfd");
 304                 return -1;
 305         }
 306
 307         ret = SSL_connect(sock->ssl);
 308         if (ret <= 0) {
 309                 socket_perror("SSL_connect", sock, ret);
 310                 return -1;
 311         }
 312
 313         if (verify) {
 314                 /* make sure the hostname matches that of the certificate */
 315                 cert = SSL_get_peer_certificate(sock->ssl);
 316                 if (!cert)
 317                         return error("unable to get peer certificate.");
 318                 if (verify_hostname(cert, server.host) < 0)
 319                         return -1;
 320         }
 321
 322         return 0;
 323 }
 324 #endif
 325
 326 static int socket_read(struct imap_socket *sock, char *buf, int len)
 327 {
 328         ssize_t n;
 329 #ifndef NO_OPENSSL
 330         if (sock->ssl)
 331                 n = SSL_read(sock->ssl, buf, len);
 332         else
 333 #endif
 334                 n = xread(sock->fd[0], buf, len);
 335         if (n <= 0) {
 336                 socket_perror("read", sock, n);
 337                 close(sock->fd[0]);
 338                 close(sock->fd[1]);
 339                 sock->fd[0] = sock->fd[1] = -1;
 340         }
 341         return n;
 342 }
 343
 344 static int socket_write(struct imap_socket *sock, const char *buf, int len)
 345 {
 346         int n;
 347 #ifndef NO_OPENSSL
 348         if (sock->ssl)
 349                 n = SSL_write(sock->ssl, buf, len);
 350         else
 351 #endif
 352                 n = write_in_full(sock->fd[1], buf, len);
 353         if (n != len) {
 354                 socket_perror("write", sock, n);
 355                 close(sock->fd[0]);
 356                 close(sock->fd[1]);
 357                 sock->fd[0] = sock->fd[1] = -1;
 358         }
 359         return n;
 360 }
 361
 362 static void socket_shutdown(struct imap_socket *sock)
 363 {
 364 #ifndef NO_OPENSSL
 365         if (sock->ssl) {
 366                 SSL_shutdown(sock->ssl);
 367                 SSL_free(sock->ssl);
 368         }
 369 #endif
 370         close(sock->fd[0]);
 371         close(sock->fd[1]);
 372 }
 373
 374 /* simple line buffering */
 375 static int buffer_gets(struct imap_buffer *b, char **s)
 376 {
 377         int n;
 378         int start = b->offset;
 379
 380         *s = b->buf + start;
 381
 382         for (;;) {
 383                 /* make sure we have enough data to read the \r\n sequence */
 384                 if (b->offset + 1 >= b->bytes) {
 385                         if (start) {
 386                                 /* shift down used bytes */
 387                                 *s = b->buf;
 388
 389                                 assert(start <= b->bytes);
 390                                 n = b->bytes - start;
 391
 392                                 if (n)
 393                                         memmove(b->buf, b->buf + start, n);
 394                                 b->offset -= start;
 395                                 b->bytes = n;
 396                                 start = 0;
 397                         }
 398
 399                         n = socket_read(&b->sock, b->buf + b->bytes,
 400                                          sizeof(b->buf) - b->bytes);
 401
 402                         if (n <= 0)
 403                                 return -1;
 404
 405                         b->bytes += n;
 406                 }
 407
 408                 if (b->buf[b->offset] == '\r') {
 409                         assert(b->offset + 1 < b->bytes);
 410                         if (b->buf[b->offset + 1] == '\n') {
 411                                 b->buf[b->offset] = 0;  /* terminate the string */
 412                                 b->offset += 2; /* next line */
 413                                 if (Verbose)
 414                                         puts(*s);
 415                                 return 0;
 416                         }
 417                 }
 418
 419                 b->offset++;
 420         }
 421         /* not reached */
 422 }
 423
 424 static void imap_info(const char *msg, ...)
 425 {
 426         va_list va;
 427
 428         if (!Quiet) {
 429                 va_start(va, msg);
 430                 vprintf(msg, va);
 431                 va_end(va);
 432                 fflush(stdout);
 433         }
 434 }
 435
 436 static void imap_warn(const char *msg, ...)
 437 {
 438         va_list va;
 439
 440         if (Quiet < 2) {
 441                 va_start(va, msg);
 442                 vfprintf(stderr, msg, va);
 443                 va_end(va);
 444         }
 445 }
 446
 447 static char *next_arg(char **s)
 448 {
 449         char *ret;
 450
 451         if (!s || !*s)
 452                 return NULL;
 453         while (isspace((unsigned char) **s))
 454                 (*s)++;
 455         if (!**s) {
 456                 *s = NULL;
 457                 return NULL;
 458         }
 459         if (**s == '"') {
 460                 ++*s;
 461                 ret = *s;
 462                 *s = strchr(*s, '"');
 463         } else {
 464                 ret = *s;
 465                 while (**s && !isspace((unsigned char) **s))
 466                         (*s)++;
 467         }
 468         if (*s) {
 469                 if (**s)
 470                         *(*s)++ = 0;
 471                 if (!**s)
 472                         *s = NULL;
 473         }
 474         return ret;
 475 }
 476
 477 static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
 478 {
 479         int ret;
 480         va_list va;
 481
 482         va_start(va, fmt);
 483         if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
 484                 die("Fatal: buffer too small. Please report a bug.");
 485         va_end(va);
 486         return ret;
 487 }
 488
 489 static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
 490                                          struct imap_cmd_cb *cb,
 491                                          const char *fmt, va_list ap)
 492 {
 493         struct imap *imap = ctx->imap;
 494         struct imap_cmd *cmd;
 495         int n, bufl;
 496         char buf[1024];
 497
 498         cmd = xmalloc(sizeof(struct imap_cmd));
 499         nfvasprintf(&cmd->cmd, fmt, ap);
 500         cmd->tag = ++imap->nexttag;
 501
 502         if (cb)
 503                 cmd->cb = *cb;
 504         else
 505                 memset(&cmd->cb, 0, sizeof(cmd->cb));
 506
 507         while (imap->literal_pending)
 508                 get_cmd_result(ctx, NULL);
 509
 510         if (!cmd->cb.data)
 511                 bufl = nfsnprintf(buf, sizeof(buf), "%d %s\r\n", cmd->tag, cmd->cmd);
 512         else
 513                 bufl = nfsnprintf(buf, sizeof(buf), "%d %s{%d%s}\r\n",
 514                                   cmd->tag, cmd->cmd, cmd->cb.dlen,
 515                                   CAP(LITERALPLUS) ? "+" : "");
 516
 517         if (Verbose) {
 518                 if (imap->num_in_progress)
 519                         printf("(%d in progress) ", imap->num_in_progress);
 520                 if (memcmp(cmd->cmd, "LOGIN", 5))
 521                         printf(">>> %s", buf);
 522                 else
 523                         printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
 524         }
 525         if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
 526                 free(cmd->cmd);
 527                 free(cmd);
 528                 if (cb)
 529                         free(cb->data);
 530                 return NULL;
 531         }
 532         if (cmd->cb.data) {
 533                 if (CAP(LITERALPLUS)) {
 534                         n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
 535                         free(cmd->cb.data);
 536                         if (n != cmd->cb.dlen ||
 537                             socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
 538                                 free(cmd->cmd);
 539                                 free(cmd);
 540                                 return NULL;
 541                         }
 542                         cmd->cb.data = NULL;
 543                 } else
 544                         imap->literal_pending = 1;
 545         } else if (cmd->cb.cont)
 546                 imap->literal_pending = 1;
 547         cmd->next = NULL;
 548         *imap->in_progress_append = cmd;
 549         imap->in_progress_append = &cmd->next;
 550         imap->num_in_progress++;
 551         return cmd;
 552 }
 553
 554 __attribute__((format (printf, 3, 4)))
 555 static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
 556                                        struct imap_cmd_cb *cb,
 557                                        const char *fmt, ...)
 558 {
 559         struct imap_cmd *ret;
 560         va_list ap;
 561
 562         va_start(ap, fmt);
 563         ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
 564         va_end(ap);
 565         return ret;
 566 }
 567
 568 __attribute__((format (printf, 3, 4)))
 569 static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
 570                      const char *fmt, ...)
 571 {
 572         va_list ap;
 573         struct imap_cmd *cmdp;
 574
 575         va_start(ap, fmt);
 576         cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 577         va_end(ap);
 578         if (!cmdp)
 579                 return RESP_BAD;
 580
 581         return get_cmd_result(ctx, cmdp);
 582 }
 583
 584 __attribute__((format (printf, 3, 4)))
 585 static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
 586                        const char *fmt, ...)
 587 {
 588         va_list ap;
 589         struct imap_cmd *cmdp;
 590
 591         va_start(ap, fmt);
 592         cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 593         va_end(ap);
 594         if (!cmdp)
 595                 return DRV_STORE_BAD;
 596
 597         switch (get_cmd_result(ctx, cmdp)) {
 598         case RESP_BAD: return DRV_STORE_BAD;
 599         case RESP_NO: return DRV_MSG_BAD;
 600         default: return DRV_OK;
 601         }
 602 }
 603
 604 static int skip_imap_list_l(char **sp, int level)
 605 {
 606         char *s = *sp;
 607
 608         for (;;) {
 609                 while (isspace((unsigned char)*s))
 610                         s++;
 611                 if (level && *s == ')') {
 612                         s++;
 613                         break;
 614                 }
 615                 if (*s == '(') {
 616                         /* sublist */
 617                         s++;
 618                         if (skip_imap_list_l(&s, level + 1))
 619                                 goto bail;
 620                 } else if (*s == '"') {
 621                         /* quoted string */
 622                         s++;
 623                         for (; *s != '"'; s++)
 624                                 if (!*s)
 625                                         goto bail;
 626                         s++;
 627                 } else {
 628                         /* atom */
 629                         for (; *s && !isspace((unsigned char)*s); s++)
 630                                 if (level && *s == ')')
 631                                         break;
 632                 }
 633
 634                 if (!level)
 635                         break;
 636                 if (!*s)
 637                         goto bail;
 638         }
 639         *sp = s;
 640         return 0;
 641
 642 bail:
 643         return -1;
 644 }
 645
 646 static void skip_list(char **sp)
 647 {
 648         skip_imap_list_l(sp, 0);
 649 }
 650
 651 static void parse_capability(struct imap *imap, char *cmd)
 652 {
 653         char *arg;
 654         unsigned i;
 655
 656         imap->caps = 0x80000000;
 657         while ((arg = next_arg(&cmd)))
 658                 for (i = 0; i < ARRAY_SIZE(cap_list); i++)
 659                         if (!strcmp(cap_list[i], arg))
 660                                 imap->caps |= 1 << i;
 661         imap->rcaps = imap->caps;
 662 }
 663
 664 static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
 665                                char *s)
 666 {
 667         struct imap *imap = ctx->imap;
 668         char *arg, *p;
 669
 670         if (*s != '[')
 671                 return RESP_OK;         /* no response code */
 672         s++;
 673         if (!(p = strchr(s, ']'))) {
 674                 fprintf(stderr, "IMAP error: malformed response code\n");
 675                 return RESP_BAD;
 676         }
 677         *p++ = 0;
 678         arg = next_arg(&s);
 679         if (!strcmp("UIDVALIDITY", arg)) {
 680                 if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg))) {
 681                         fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
 682                         return RESP_BAD;
 683                 }
 684         } else if (!strcmp("UIDNEXT", arg)) {
 685                 if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
 686                         fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
 687                         return RESP_BAD;
 688                 }
 689         } else if (!strcmp("CAPABILITY", arg)) {
 690                 parse_capability(imap, s);
 691         } else if (!strcmp("ALERT", arg)) {
 692                 /* RFC2060 says that these messages MUST be displayed
 693                  * to the user
 694                  */
 695                 for (; isspace((unsigned char)*p); p++);
 696                 fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
 697         } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
 698                 if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg)) ||
 699                     !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
 700                         fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
 701                         return RESP_BAD;
 702                 }
 703         }
 704         return RESP_OK;
 705 }
 706
 707 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
 708 {
 709         struct imap *imap = ctx->imap;
 710         struct imap_cmd *cmdp, **pcmdp, *ncmdp;
 711         char *cmd, *arg, *arg1, *p;
 712         int n, resp, resp2, tag;
 713
 714         for (;;) {
 715                 if (buffer_gets(&imap->buf, &cmd))
 716                         return RESP_BAD;
 717
 718                 arg = next_arg(&cmd);
 719                 if (*arg == '*') {
 720                         arg = next_arg(&cmd);
 721                         if (!arg) {
 722                                 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 723                                 return RESP_BAD;
 724                         }
 725
 726                         if (!strcmp("NAMESPACE", arg)) {
 727                                 /* rfc2342 NAMESPACE response. */
 728                                 skip_list(&cmd); /* Personal mailboxes */
 729                                 skip_list(&cmd); /* Others' mailboxes */
 730                                 skip_list(&cmd); /* Shared mailboxes */
 731                         } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
 732                                    !strcmp("NO", arg) || !strcmp("BYE", arg)) {
 733                                 if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
 734                                         return resp;
 735                         } else if (!strcmp("CAPABILITY", arg)) {
 736                                 parse_capability(imap, cmd);
 737                         } else if ((arg1 = next_arg(&cmd))) {
 738                                 ; /*
 739                                    * Unhandled response-data with at least two words.
 740                                    * Ignore it.
 741                                    *
 742                                    * NEEDSWORK: Previously this case handled '<num> EXISTS'
 743                                    * and '<num> RECENT' but as a probably-unintended side
 744                                    * effect it ignores other unrecognized two-word
 745                                    * responses.  imap-send doesn't ever try to read
 746                                    * messages or mailboxes these days, so consider
 747                                    * eliminating this case.
 748                                    */
 749                         } else {
 750                                 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 751                                 return RESP_BAD;
 752                         }
 753                 } else if (!imap->in_progress) {
 754                         fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
 755                         return RESP_BAD;
 756                 } else if (*arg == '+') {
 757                         /* This can happen only with the last command underway, as
 758                            it enforces a round-trip. */
 759                         cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
 760                                offsetof(struct imap_cmd, next));
 761                         if (cmdp->cb.data) {
 762                                 n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
 763                                 free(cmdp->cb.data);
 764                                 cmdp->cb.data = NULL;
 765                                 if (n != (int)cmdp->cb.dlen)
 766                                         return RESP_BAD;
 767                         } else if (cmdp->cb.cont) {
 768                                 if (cmdp->cb.cont(ctx, cmdp, cmd))
 769                                         return RESP_BAD;
 770                         } else {
 771                                 fprintf(stderr, "IMAP error: unexpected command continuation request\n");
 772                                 return RESP_BAD;
 773                         }
 774                         if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
 775                                 return RESP_BAD;
 776                         if (!cmdp->cb.cont)
 777                                 imap->literal_pending = 0;
 778                         if (!tcmd)
 779                                 return DRV_OK;
 780                 } else {
 781                         tag = atoi(arg);
 782                         for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
 783                                 if (cmdp->tag == tag)
 784                                         goto gottag;
 785                         fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
 786                         return RESP_BAD;
 787                 gottag:
 788                         if (!(*pcmdp = cmdp->next))
 789                                 imap->in_progress_append = pcmdp;
 790                         imap->num_in_progress--;
 791                         if (cmdp->cb.cont || cmdp->cb.data)
 792                                 imap->literal_pending = 0;
 793                         arg = next_arg(&cmd);
 794                         if (!strcmp("OK", arg))
 795                                 resp = DRV_OK;
 796                         else {
 797                                 if (!strcmp("NO", arg)) {
 798                                         if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
 799                                                 p = strchr(cmdp->cmd, '"');
 800                                                 if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", (int)(strchr(p + 1, '"') - p + 1), p)) {
 801                                                         resp = RESP_BAD;
 802                                                         goto normal;
 803                                                 }
 804                                                 /* not waiting here violates the spec, but a server that does not
 805                                                    grok this nonetheless violates it too. */
 806                                                 cmdp->cb.create = 0;
 807                                                 if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
 808                                                         resp = RESP_BAD;
 809                                                         goto normal;
 810                                                 }
 811                                                 free(cmdp->cmd);
 812                                                 free(cmdp);
 813                                                 if (!tcmd)
 814                                                         return 0;       /* ignored */
 815                                                 if (cmdp == tcmd)
 816                                                         tcmd = ncmdp;
 817                                                 continue;
 818                                         }
 819                                         resp = RESP_NO;
 820                                 } else /*if (!strcmp("BAD", arg))*/
 821                                         resp = RESP_BAD;
 822                                 fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
 823                                          memcmp(cmdp->cmd, "LOGIN", 5) ?
 824                                                         cmdp->cmd : "LOGIN <user> <pass>",
 825                                                         arg, cmd ? cmd : "");
 826                         }
 827                         if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
 828                                 resp = resp2;
 829                 normal:
 830                         if (cmdp->cb.done)
 831                                 cmdp->cb.done(ctx, cmdp, resp);
 832                         free(cmdp->cb.data);
 833                         free(cmdp->cmd);
 834                         free(cmdp);
 835                         if (!tcmd || tcmd == cmdp)
 836                                 return resp;
 837                 }
 838         }
 839         /* not reached */
 840 }
 841
 842 static void imap_close_server(struct imap_store *ictx)
 843 {
 844         struct imap *imap = ictx->imap;
 845
 846         if (imap->buf.sock.fd[0] != -1) {
 847                 imap_exec(ictx, NULL, "LOGOUT");
 848                 socket_shutdown(&imap->buf.sock);
 849         }
 850         free(imap);
 851 }
 852
 853 static void imap_close_store(struct imap_store *ctx)
 854 {
 855         imap_close_server(ctx);
 856         free(ctx);
 857 }
 858
 859 #ifndef NO_OPENSSL
 860
 861 /*
 862  * hexchar() and cram() functions are based on the code from the isync
 863  * project (http://isync.sf.net/).
 864  */
 865 static char hexchar(unsigned int b)
 866 {
 867         return b < 10 ? '0' + b : 'a' + (b - 10);
 868 }
 869
 870 #define ENCODED_SIZE(n) (4*((n+2)/3))
 871 static char *cram(const char *challenge_64, const char *user, const char *pass)
 872 {
 873         int i, resp_len, encoded_len, decoded_len;
 874         HMAC_CTX hmac;
 875         unsigned char hash[16];
 876         char hex[33];
 877         char *response, *response_64, *challenge;
 878
 879         /*
 880          * length of challenge_64 (i.e. base-64 encoded string) is a good
 881          * enough upper bound for challenge (decoded result).
 882          */
 883         encoded_len = strlen(challenge_64);
 884         challenge = xmalloc(encoded_len);
 885         decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
 886                                       (unsigned char *)challenge_64, encoded_len);
 887         if (decoded_len < 0)
 888                 die("invalid challenge %s", challenge_64);
 889         HMAC_Init(&hmac, (unsigned char *)pass, strlen(pass), EVP_md5());
 890         HMAC_Update(&hmac, (unsigned char *)challenge, decoded_len);
 891         HMAC_Final(&hmac, hash, NULL);
 892         HMAC_CTX_cleanup(&hmac);
 893
 894         hex[32] = 0;
 895         for (i = 0; i < 16; i++) {
 896                 hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
 897                 hex[2 * i + 1] = hexchar(hash[i] & 0xf);
 898         }
 899
 900         /* response: "<user> <digest in hex>" */
 901         resp_len = strlen(user) + 1 + strlen(hex) + 1;
 902         response = xmalloc(resp_len);
 903         sprintf(response, "%s %s", user, hex);
 904
 905         response_64 = xmalloc(ENCODED_SIZE(resp_len) + 1);
 906         encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
 907                                       (unsigned char *)response, resp_len);
 908         if (encoded_len < 0)
 909                 die("EVP_EncodeBlock error");
 910         response_64[encoded_len] = '\0';
 911         return (char *)response_64;
 912 }
 913
 914 #else
 915
 916 static char *cram(const char *challenge_64, const char *user, const char *pass)
 917 {
 918         die("If you want to use CRAM-MD5 authenticate method, "
 919             "you have to build git-imap-send with OpenSSL library.");
 920 }
 921
 922 #endif
 923
 924 static int auth_cram_md5(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt)
 925 {
 926         int ret;
 927         char *response;
 928
 929         response = cram(prompt, server.user, server.pass);
 930
 931         ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
 932         if (ret != strlen(response))
 933                 return error("IMAP error: sending response failed");
 934
 935         free(response);
 936
 937         return 0;
 938 }
 939
 940 static struct imap_store *imap_open_store(struct imap_server_conf *srvc)
 941 {
 942         struct imap_store *ctx;
 943         struct imap *imap;
 944         char *arg, *rsp;
 945         int s = -1, preauth;
 946
 947         ctx = xcalloc(sizeof(*ctx), 1);
 948
 949         ctx->imap = imap = xcalloc(sizeof(*imap), 1);
 950         imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
 951         imap->in_progress_append = &imap->in_progress;
 952
 953         /* open connection to IMAP server */
 954
 955         if (srvc->tunnel) {
 956                 const char *argv[] = { srvc->tunnel, NULL };
 957                 struct child_process tunnel = {NULL};
 958
 959                 imap_info("Starting tunnel '%s'... ", srvc->tunnel);
 960
 961                 tunnel.argv = argv;
 962                 tunnel.use_shell = 1;
 963                 tunnel.in = -1;
 964                 tunnel.out = -1;
 965                 if (start_command(&tunnel))
 966                         die("cannot start proxy %s", argv[0]);
 967
 968                 imap->buf.sock.fd[0] = tunnel.out;
 969                 imap->buf.sock.fd[1] = tunnel.in;
 970
 971                 imap_info("ok\n");
 972         } else {
 973 #ifndef NO_IPV6
 974                 struct addrinfo hints, *ai0, *ai;
 975                 int gai;
 976                 char portstr[6];
 977
 978                 snprintf(portstr, sizeof(portstr), "%d", srvc->port);
 979
 980                 memset(&hints, 0, sizeof(hints));
 981                 hints.ai_socktype = SOCK_STREAM;
 982                 hints.ai_protocol = IPPROTO_TCP;
 983
 984                 imap_info("Resolving %s... ", srvc->host);
 985                 gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
 986                 if (gai) {
 987                         fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
 988                         goto bail;
 989                 }
 990                 imap_info("ok\n");
 991
 992                 for (ai0 = ai; ai; ai = ai->ai_next) {
 993                         char addr[NI_MAXHOST];
 994
 995                         s = socket(ai->ai_family, ai->ai_socktype,
 996                                    ai->ai_protocol);
 997                         if (s < 0)
 998                                 continue;
 999
1000                         getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1001                                     sizeof(addr), NULL, 0, NI_NUMERICHOST);
1002                         imap_info("Connecting to [%s]:%s... ", addr, portstr);
1003
1004                         if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1005                                 close(s);
1006                                 s = -1;
1007                                 perror("connect");
1008                                 continue;
1009                         }
1010
1011                         break;
1012                 }
1013                 freeaddrinfo(ai0);
1014 #else /* NO_IPV6 */
1015                 struct hostent *he;
1016                 struct sockaddr_in addr;
1017
1018                 memset(&addr, 0, sizeof(addr));
1019                 addr.sin_port = htons(srvc->port);
1020                 addr.sin_family = AF_INET;
1021
1022                 imap_info("Resolving %s... ", srvc->host);
1023                 he = gethostbyname(srvc->host);
1024                 if (!he) {
1025                         perror("gethostbyname");
1026                         goto bail;
1027                 }
1028                 imap_info("ok\n");
1029
1030                 addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1031
1032                 s = socket(PF_INET, SOCK_STREAM, 0);
1033
1034                 imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1035                 if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1036                         close(s);
1037                         s = -1;
1038                         perror("connect");
1039                 }
1040 #endif
1041                 if (s < 0) {
1042                         fputs("Error: unable to connect to server.\n", stderr);
1043                         goto bail;
1044                 }
1045
1046                 imap->buf.sock.fd[0] = s;
1047                 imap->buf.sock.fd[1] = dup(s);
1048
1049                 if (srvc->use_ssl &&
1050                     ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1051                         close(s);
1052                         goto bail;
1053                 }
1054                 imap_info("ok\n");
1055         }
1056
1057         /* read the greeting string */
1058         if (buffer_gets(&imap->buf, &rsp)) {
1059                 fprintf(stderr, "IMAP error: no greeting response\n");
1060                 goto bail;
1061         }
1062         arg = next_arg(&rsp);
1063         if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1064                 fprintf(stderr, "IMAP error: invalid greeting response\n");
1065                 goto bail;
1066         }
1067         preauth = 0;
1068         if (!strcmp("PREAUTH", arg))
1069                 preauth = 1;
1070         else if (strcmp("OK", arg) != 0) {
1071                 fprintf(stderr, "IMAP error: unknown greeting response\n");
1072                 goto bail;
1073         }
1074         parse_response_code(ctx, NULL, rsp);
1075         if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1076                 goto bail;
1077
1078         if (!preauth) {
1079 #ifndef NO_OPENSSL
1080                 if (!srvc->use_ssl && CAP(STARTTLS)) {
1081                         if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK)
1082                                 goto bail;
1083                         if (ssl_socket_connect(&imap->buf.sock, 1,
1084                                                srvc->ssl_verify))
1085                                 goto bail;
1086                         /* capabilities may have changed, so get the new capabilities */
1087                         if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1088                                 goto bail;
1089                 }
1090 #endif
1091                 imap_info("Logging in...\n");
1092                 if (!srvc->user) {
1093                         fprintf(stderr, "Skipping server %s, no user\n", srvc->host);
1094                         goto bail;
1095                 }
1096                 if (!srvc->pass) {
1097                         struct strbuf prompt = STRBUF_INIT;
1098                         strbuf_addf(&prompt, "Password (%s@%s): ", srvc->user, srvc->host);
1099                         arg = git_getpass(prompt.buf);
1100                         strbuf_release(&prompt);
1101                         if (!*arg) {
1102                                 fprintf(stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host);
1103                                 goto bail;
1104                         }
1105                         /*
1106                          * getpass() returns a pointer to a static buffer.  make a copy
1107                          * for long term storage.
1108                          */
1109                         srvc->pass = xstrdup(arg);
1110                 }
1111                 if (CAP(NOLOGIN)) {
1112                         fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1113                         goto bail;
1114                 }
1115
1116                 if (srvc->auth_method) {
1117                         struct imap_cmd_cb cb;
1118
1119                         if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1120                                 if (!CAP(AUTH_CRAM_MD5)) {
1121                                         fprintf(stderr, "You specified"
1122                                                 "CRAM-MD5 as authentication method, "
1123                                                 "but %s doesn't support it.\n", srvc->host);
1124                                         goto bail;
1125                                 }
1126                                 /* CRAM-MD5 */
1127
1128                                 memset(&cb, 0, sizeof(cb));
1129                                 cb.cont = auth_cram_md5;
1130                                 if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1131                                         fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1132                                         goto bail;
1133                                 }
1134                         } else {
1135                                 fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1136                                 goto bail;
1137                         }
1138                 } else {
1139                         if (!imap->buf.sock.ssl)
1140                                 imap_warn("*** IMAP Warning *** Password is being "
1141                                           "sent in the clear\n");
1142                         if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1143                                 fprintf(stderr, "IMAP error: LOGIN failed\n");
1144                                 goto bail;
1145                         }
1146                 }
1147         } /* !preauth */
1148
1149         ctx->prefix = "";
1150         return ctx;
1151
1152 bail:
1153         imap_close_store(ctx);
1154         return NULL;
1155 }
1156
1157 /*
1158  * Insert CR characters as necessary in *msg to ensure that every LF
1159  * character in *msg is preceded by a CR.
1160  */
1161 static void lf_to_crlf(struct strbuf *msg)
1162 {
1163         char *new;
1164         size_t i, j;
1165         char lastc;
1166
1167         /* First pass: tally, in j, the size of the new string: */
1168         for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1169                 if (msg->buf[i] == '\n' && lastc != '\r')
1170                         j++; /* a CR will need to be added here */
1171                 lastc = msg->buf[i];
1172                 j++;
1173         }
1174
1175         new = xmalloc(j + 1);
1176
1177         /*
1178          * Second pass: write the new string.  Note that this loop is
1179          * otherwise identical to the first pass.
1180          */
1181         for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1182                 if (msg->buf[i] == '\n' && lastc != '\r')
1183                         new[j++] = '\r';
1184                 lastc = new[j++] = msg->buf[i];
1185         }
1186         strbuf_attach(msg, new, j, j + 1);
1187 }
1188
1189 /*
1190  * Store msg to IMAP.  Also detach and free the data from msg->data,
1191  * leaving msg->data empty.
1192  */
1193 static int imap_store_msg(struct imap_store *ctx, struct strbuf *msg)
1194 {
1195         struct imap *imap = ctx->imap;
1196         struct imap_cmd_cb cb;
1197         const char *prefix, *box;
1198         int ret;
1199
1200         lf_to_crlf(msg);
1201         memset(&cb, 0, sizeof(cb));
1202
1203         cb.dlen = msg->len;
1204         cb.data = strbuf_detach(msg, NULL);
1205
1206         box = ctx->name;
1207         prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1208         cb.create = 0;
1209         ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" ", prefix, box);
1210         imap->caps = imap->rcaps;
1211         if (ret != DRV_OK)
1212                 return ret;
1213
1214         return DRV_OK;
1215 }
1216
1217 static void wrap_in_html(struct strbuf *msg)
1218 {
1219         struct strbuf buf = STRBUF_INIT;
1220         static char *content_type = "Content-Type: text/html;\n";
1221         static char *pre_open = "<pre>\n";
1222         static char *pre_close = "</pre>\n";
1223         const char *body = strstr(msg->buf, "\n\n");
1224
1225         if (!body)
1226                 return; /* Headers but no body; no wrapping needed */
1227
1228         body += 2;
1229
1230         strbuf_add(&buf, msg->buf, body - msg->buf - 1);
1231         strbuf_addstr(&buf, content_type);
1232         strbuf_addch(&buf, '\n');
1233         strbuf_addstr(&buf, pre_open);
1234         strbuf_addstr_xml_quoted(&buf, body);
1235         strbuf_addstr(&buf, pre_close);
1236
1237         strbuf_release(msg);
1238         *msg = buf;
1239 }
1240
1241 #define CHUNKSIZE 0x1000
1242
1243 static int read_message(FILE *f, struct strbuf *all_msgs)
1244 {
1245         do {
1246                 if (strbuf_fread(all_msgs, CHUNKSIZE, f) <= 0)
1247                         break;
1248         } while (!feof(f));
1249
1250         return ferror(f) ? -1 : 0;
1251 }
1252
1253 static int count_messages(struct strbuf *all_msgs)
1254 {
1255         int count = 0;
1256         char *p = all_msgs->buf;
1257
1258         while (1) {
1259                 if (!prefixcmp(p, "From ")) {
1260                         p = strstr(p+5, "\nFrom: ");
1261                         if (!p) break;
1262                         p = strstr(p+7, "\nDate: ");
1263                         if (!p) break;
1264                         p = strstr(p+7, "\nSubject: ");
1265                         if (!p) break;
1266                         p += 10;
1267                         count++;
1268                 }
1269                 p = strstr(p+5, "\nFrom ");
1270                 if (!p)
1271                         break;
1272                 p++;
1273         }
1274         return count;
1275 }
1276
1277 /*
1278  * Copy the next message from all_msgs, starting at offset *ofs, to
1279  * msg.  Update *ofs to the start of the following message.  Return
1280  * true iff a message was successfully copied.
1281  */
1282 static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs)
1283 {
1284         char *p, *data;
1285         size_t len;
1286
1287         if (*ofs >= all_msgs->len)
1288                 return 0;
1289
1290         data = &all_msgs->buf[*ofs];
1291         len = all_msgs->len - *ofs;
1292
1293         if (len < 5 || prefixcmp(data, "From "))
1294                 return 0;
1295
1296         p = strchr(data, '\n');
1297         if (p) {
1298                 p++;
1299                 len -= p - data;
1300                 *ofs += p - data;
1301                 data = p;
1302         }
1303
1304         p = strstr(data, "\nFrom ");
1305         if (p)
1306                 len = &p[1] - data;
1307
1308         strbuf_add(msg, data, len);
1309         *ofs += len;
1310         return 1;
1311 }
1312
1313 static char *imap_folder;
1314
1315 static int git_imap_config(const char *key, const char *val, void *cb)
1316 {
1317         char imap_key[] = "imap.";
1318
1319         if (strncmp(key, imap_key, sizeof imap_key - 1))
1320                 return 0;
1321
1322         key += sizeof imap_key - 1;
1323
1324         /* check booleans first, and barf on others */
1325         if (!strcmp("sslverify", key))
1326                 server.ssl_verify = git_config_bool(key, val);
1327         else if (!strcmp("preformattedhtml", key))
1328                 server.use_html = git_config_bool(key, val);
1329         else if (!val)
1330                 return config_error_nonbool(key);
1331
1332         if (!strcmp("folder", key)) {
1333                 imap_folder = xstrdup(val);
1334         } else if (!strcmp("host", key)) {
1335                 if (!prefixcmp(val, "imap:"))
1336                         val += 5;
1337                 else if (!prefixcmp(val, "imaps:")) {
1338                         val += 6;
1339                         server.use_ssl = 1;
1340                 }
1341                 if (!prefixcmp(val, "//"))
1342                         val += 2;
1343                 server.host = xstrdup(val);
1344         } else if (!strcmp("user", key))
1345                 server.user = xstrdup(val);
1346         else if (!strcmp("pass", key))
1347                 server.pass = xstrdup(val);
1348         else if (!strcmp("port", key))
1349                 server.port = git_config_int(key, val);
1350         else if (!strcmp("tunnel", key))
1351                 server.tunnel = xstrdup(val);
1352         else if (!strcmp("authmethod", key))
1353                 server.auth_method = xstrdup(val);
1354
1355         return 0;
1356 }
1357
1358 int main(int argc, char **argv)
1359 {
1360         struct strbuf all_msgs = STRBUF_INIT;
1361         struct strbuf msg = STRBUF_INIT;
1362         struct imap_store *ctx = NULL;
1363         int ofs = 0;
1364         int r;
1365         int total, n = 0;
1366         int nongit_ok;
1367
1368         git_extract_argv0_path(argv[0]);
1369
1370         git_setup_gettext();
1371
1372         if (argc != 1)
1373                 usage(imap_send_usage);
1374
1375         setup_git_directory_gently(&nongit_ok);
1376         git_config(git_imap_config, NULL);
1377
1378         if (!server.port)
1379                 server.port = server.use_ssl ? 993 : 143;
1380
1381         if (!imap_folder) {
1382                 fprintf(stderr, "no imap store specified\n");
1383                 return 1;
1384         }
1385         if (!server.host) {
1386                 if (!server.tunnel) {
1387                         fprintf(stderr, "no imap host specified\n");
1388                         return 1;
1389                 }
1390                 server.host = "tunnel";
1391         }
1392
1393         /* read the messages */
1394         if (read_message(stdin, &all_msgs)) {
1395                 fprintf(stderr, "error reading input\n");
1396                 return 1;
1397         }
1398
1399         if (all_msgs.len == 0) {
1400                 fprintf(stderr, "nothing to send\n");
1401                 return 1;
1402         }
1403
1404         total = count_messages(&all_msgs);
1405         if (!total) {
1406                 fprintf(stderr, "no messages to send\n");
1407                 return 1;
1408         }
1409
1410         /* write it to the imap server */
1411         ctx = imap_open_store(&server);
1412         if (!ctx) {
1413                 fprintf(stderr, "failed to open store\n");
1414                 return 1;
1415         }
1416
1417         fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1418         ctx->name = imap_folder;
1419         while (1) {
1420                 unsigned percent = n * 100 / total;
1421
1422                 fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1423                 if (!split_msg(&all_msgs, &msg, &ofs))
1424                         break;
1425                 if (server.use_html)
1426                         wrap_in_html(&msg);
1427                 r = imap_store_msg(ctx, &msg);
1428                 if (r != DRV_OK)
1429                         break;
1430                 n++;
1431         }
1432         fprintf(stderr, "\n");
1433
1434         imap_close_store(ctx);
1435
1436         return 0;
1437 }