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 #ifdef APPLE_COMMON_CRYPTO
  33 #include <CommonCrypto/CommonHMAC.h>
  34 #define HMAC_CTX CCHmacContext
  35 #define HMAC_Init(hmac, key, len, algo) CCHmacInit(hmac, algo, key, len)
  36 #define HMAC_Update CCHmacUpdate
  37 #define HMAC_Final(hmac, hash, ptr) CCHmacFinal(hmac, hash)
  38 #define HMAC_CTX_cleanup(ignore)
  39 #define EVP_md5() kCCHmacAlgMD5
  40 #else
  41 #include <openssl/evp.h>
  42 #include <openssl/hmac.h>
  43 #endif
  44 #include <openssl/x509v3.h>
  45 #endif
  46
  47 static const char imap_send_usage[] = "git imap-send < <mbox>";
  48
  49 #undef DRV_OK
  50 #define DRV_OK          0
  51 #define DRV_MSG_BAD     -1
  52 #define DRV_BOX_BAD     -2
  53 #define DRV_STORE_BAD   -3
  54
  55 static int Verbose, Quiet;
  56
  57 __attribute__((format (printf, 1, 2)))
  58 static void imap_info(const char *, ...);
  59 __attribute__((format (printf, 1, 2)))
  60 static void imap_warn(const char *, ...);
  61
  62 static char *next_arg(char **);
  63
  64 __attribute__((format (printf, 3, 4)))
  65 static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
  66
  67 static int nfvasprintf(char **strp, const char *fmt, va_list ap)
  68 {
  69         int len;
  70         char tmp[8192];
  71
  72         len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
  73         if (len < 0)
  74                 die("Fatal: Out of memory");
  75         if (len >= sizeof(tmp))
  76                 die("imap command overflow!");
  77         *strp = xmemdupz(tmp, len);
  78         return len;
  79 }
  80
  81 struct imap_server_conf {
  82         char *name;
  83         char *tunnel;
  84         char *host;
  85         int port;
  86         char *user;
  87         char *pass;
  88         int use_ssl;
  89         int ssl_verify;
  90         int use_html;
  91         char *auth_method;
  92 };
  93
  94 static struct imap_server_conf server = {
  95         NULL,   /* name */
  96         NULL,   /* tunnel */
  97         NULL,   /* host */
  98         0,      /* port */
  99         NULL,   /* user */
 100         NULL,   /* pass */
 101         0,      /* use_ssl */
 102         1,      /* ssl_verify */
 103         0,      /* use_html */
 104         NULL,   /* auth_method */
 105 };
 106
 107 struct imap_socket {
 108         int fd[2];
 109         SSL *ssl;
 110 };
 111
 112 struct imap_buffer {
 113         struct imap_socket sock;
 114         int bytes;
 115         int offset;
 116         char buf[1024];
 117 };
 118
 119 struct imap_cmd;
 120
 121 struct imap {
 122         int uidnext; /* from SELECT responses */
 123         unsigned caps, rcaps; /* CAPABILITY results */
 124         /* command queue */
 125         int nexttag, num_in_progress, literal_pending;
 126         struct imap_cmd *in_progress, **in_progress_append;
 127         struct imap_buffer buf; /* this is BIG, so put it last */
 128 };
 129
 130 struct imap_store {
 131         /* currently open mailbox */
 132         const char *name; /* foreign! maybe preset? */
 133         int uidvalidity;
 134         struct imap *imap;
 135         const char *prefix;
 136 };
 137
 138 struct imap_cmd_cb {
 139         int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
 140         void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
 141         void *ctx;
 142         char *data;
 143         int dlen;
 144         int uid;
 145         unsigned create:1, trycreate:1;
 146 };
 147
 148 struct imap_cmd {
 149         struct imap_cmd *next;
 150         struct imap_cmd_cb cb;
 151         char *cmd;
 152         int tag;
 153 };
 154
 155 #define CAP(cap) (imap->caps & (1 << (cap)))
 156
 157 enum CAPABILITY {
 158         NOLOGIN = 0,
 159         UIDPLUS,
 160         LITERALPLUS,
 161         NAMESPACE,
 162         STARTTLS,
 163         AUTH_CRAM_MD5
 164 };
 165
 166 static const char *cap_list[] = {
 167         "LOGINDISABLED",
 168         "UIDPLUS",
 169         "LITERAL+",
 170         "NAMESPACE",
 171         "STARTTLS",
 172         "AUTH=CRAM-MD5",
 173 };
 174
 175 #define RESP_OK    0
 176 #define RESP_NO    1
 177 #define RESP_BAD   2
 178
 179 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
 180
 181
 182 #ifndef NO_OPENSSL
 183 static void ssl_socket_perror(const char *func)
 184 {
 185         fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
 186 }
 187 #endif
 188
 189 static void socket_perror(const char *func, struct imap_socket *sock, int ret)
 190 {
 191 #ifndef NO_OPENSSL
 192         if (sock->ssl) {
 193                 int sslerr = SSL_get_error(sock->ssl, ret);
 194                 switch (sslerr) {
 195                 case SSL_ERROR_NONE:
 196                         break;
 197                 case SSL_ERROR_SYSCALL:
 198                         perror("SSL_connect");
 199                         break;
 200                 default:
 201                         ssl_socket_perror("SSL_connect");
 202                         break;
 203                 }
 204         } else
 205 #endif
 206         {
 207                 if (ret < 0)
 208                         perror(func);
 209                 else
 210                         fprintf(stderr, "%s: unexpected EOF\n", func);
 211         }
 212 }
 213
 214 #ifdef NO_OPENSSL
 215 static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 216 {
 217         fprintf(stderr, "SSL requested but SSL support not compiled in\n");
 218         return -1;
 219 }
 220
 221 #else
 222
 223 static int host_matches(const char *host, const char *pattern)
 224 {
 225         if (pattern[0] == '*' && pattern[1] == '.') {
 226                 pattern += 2;
 227                 if (!(host = strchr(host, '.')))
 228                         return 0;
 229                 host++;
 230         }
 231
 232         return *host && *pattern && !strcasecmp(host, pattern);
 233 }
 234
 235 static int verify_hostname(X509 *cert, const char *hostname)
 236 {
 237         int len;
 238         X509_NAME *subj;
 239         char cname[1000];
 240         int i, found;
 241         STACK_OF(GENERAL_NAME) *subj_alt_names;
 242
 243         /* try the DNS subjectAltNames */
 244         found = 0;
 245         if ((subj_alt_names = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL))) {
 246                 int num_subj_alt_names = sk_GENERAL_NAME_num(subj_alt_names);
 247                 for (i = 0; !found && i < num_subj_alt_names; i++) {
 248                         GENERAL_NAME *subj_alt_name = sk_GENERAL_NAME_value(subj_alt_names, i);
 249                         if (subj_alt_name->type == GEN_DNS &&
 250                             strlen((const char *)subj_alt_name->d.ia5->data) == (size_t)subj_alt_name->d.ia5->length &&
 251                             host_matches(hostname, (const char *)(subj_alt_name->d.ia5->data)))
 252                                 found = 1;
 253                 }
 254                 sk_GENERAL_NAME_pop_free(subj_alt_names, GENERAL_NAME_free);
 255         }
 256         if (found)
 257                 return 0;
 258
 259         /* try the common name */
 260         if (!(subj = X509_get_subject_name(cert)))
 261                 return error("cannot get certificate subject");
 262         if ((len = X509_NAME_get_text_by_NID(subj, NID_commonName, cname, sizeof(cname))) < 0)
 263                 return error("cannot get certificate common name");
 264         if (strlen(cname) == (size_t)len && host_matches(hostname, cname))
 265                 return 0;
 266         return error("certificate owner '%s' does not match hostname '%s'",
 267                      cname, hostname);
 268 }
 269
 270 static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 271 {
 272 #if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
 273         const SSL_METHOD *meth;
 274 #else
 275         SSL_METHOD *meth;
 276 #endif
 277         SSL_CTX *ctx;
 278         int ret;
 279         X509 *cert;
 280
 281         SSL_library_init();
 282         SSL_load_error_strings();
 283
 284         if (use_tls_only)
 285                 meth = TLSv1_method();
 286         else
 287                 meth = SSLv23_method();
 288
 289         if (!meth) {
 290                 ssl_socket_perror("SSLv23_method");
 291                 return -1;
 292         }
 293
 294         ctx = SSL_CTX_new(meth);
 295
 296         if (verify)
 297                 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
 298
 299         if (!SSL_CTX_set_default_verify_paths(ctx)) {
 300                 ssl_socket_perror("SSL_CTX_set_default_verify_paths");
 301                 return -1;
 302         }
 303         sock->ssl = SSL_new(ctx);
 304         if (!sock->ssl) {
 305                 ssl_socket_perror("SSL_new");
 306                 return -1;
 307         }
 308         if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
 309                 ssl_socket_perror("SSL_set_rfd");
 310                 return -1;
 311         }
 312         if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
 313                 ssl_socket_perror("SSL_set_wfd");
 314                 return -1;
 315         }
 316
 317 #ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
 318         /*
 319          * SNI (RFC4366)
 320          * OpenSSL does not document this function, but the implementation
 321          * returns 1 on success, 0 on failure after calling SSLerr().
 322          */
 323         ret = SSL_set_tlsext_host_name(sock->ssl, server.host);
 324         if (ret != 1)
 325                 warning("SSL_set_tlsext_host_name(%s) failed.", server.host);
 326 #endif
 327
 328         ret = SSL_connect(sock->ssl);
 329         if (ret <= 0) {
 330                 socket_perror("SSL_connect", sock, ret);
 331                 return -1;
 332         }
 333
 334         if (verify) {
 335                 /* make sure the hostname matches that of the certificate */
 336                 cert = SSL_get_peer_certificate(sock->ssl);
 337                 if (!cert)
 338                         return error("unable to get peer certificate.");
 339                 if (verify_hostname(cert, server.host) < 0)
 340                         return -1;
 341         }
 342
 343         return 0;
 344 }
 345 #endif
 346
 347 static int socket_read(struct imap_socket *sock, char *buf, int len)
 348 {
 349         ssize_t n;
 350 #ifndef NO_OPENSSL
 351         if (sock->ssl)
 352                 n = SSL_read(sock->ssl, buf, len);
 353         else
 354 #endif
 355                 n = xread(sock->fd[0], buf, len);
 356         if (n <= 0) {
 357                 socket_perror("read", sock, n);
 358                 close(sock->fd[0]);
 359                 close(sock->fd[1]);
 360                 sock->fd[0] = sock->fd[1] = -1;
 361         }
 362         return n;
 363 }
 364
 365 static int socket_write(struct imap_socket *sock, const char *buf, int len)
 366 {
 367         int n;
 368 #ifndef NO_OPENSSL
 369         if (sock->ssl)
 370                 n = SSL_write(sock->ssl, buf, len);
 371         else
 372 #endif
 373                 n = write_in_full(sock->fd[1], buf, len);
 374         if (n != len) {
 375                 socket_perror("write", sock, n);
 376                 close(sock->fd[0]);
 377                 close(sock->fd[1]);
 378                 sock->fd[0] = sock->fd[1] = -1;
 379         }
 380         return n;
 381 }
 382
 383 static void socket_shutdown(struct imap_socket *sock)
 384 {
 385 #ifndef NO_OPENSSL
 386         if (sock->ssl) {
 387                 SSL_shutdown(sock->ssl);
 388                 SSL_free(sock->ssl);
 389         }
 390 #endif
 391         close(sock->fd[0]);
 392         close(sock->fd[1]);
 393 }
 394
 395 /* simple line buffering */
 396 static int buffer_gets(struct imap_buffer *b, char **s)
 397 {
 398         int n;
 399         int start = b->offset;
 400
 401         *s = b->buf + start;
 402
 403         for (;;) {
 404                 /* make sure we have enough data to read the \r\n sequence */
 405                 if (b->offset + 1 >= b->bytes) {
 406                         if (start) {
 407                                 /* shift down used bytes */
 408                                 *s = b->buf;
 409
 410                                 assert(start <= b->bytes);
 411                                 n = b->bytes - start;
 412
 413                                 if (n)
 414                                         memmove(b->buf, b->buf + start, n);
 415                                 b->offset -= start;
 416                                 b->bytes = n;
 417                                 start = 0;
 418                         }
 419
 420                         n = socket_read(&b->sock, b->buf + b->bytes,
 421                                          sizeof(b->buf) - b->bytes);
 422
 423                         if (n <= 0)
 424                                 return -1;
 425
 426                         b->bytes += n;
 427                 }
 428
 429                 if (b->buf[b->offset] == '\r') {
 430                         assert(b->offset + 1 < b->bytes);
 431                         if (b->buf[b->offset + 1] == '\n') {
 432                                 b->buf[b->offset] = 0;  /* terminate the string */
 433                                 b->offset += 2; /* next line */
 434                                 if (Verbose)
 435                                         puts(*s);
 436                                 return 0;
 437                         }
 438                 }
 439
 440                 b->offset++;
 441         }
 442         /* not reached */
 443 }
 444
 445 static void imap_info(const char *msg, ...)
 446 {
 447         va_list va;
 448
 449         if (!Quiet) {
 450                 va_start(va, msg);
 451                 vprintf(msg, va);
 452                 va_end(va);
 453                 fflush(stdout);
 454         }
 455 }
 456
 457 static void imap_warn(const char *msg, ...)
 458 {
 459         va_list va;
 460
 461         if (Quiet < 2) {
 462                 va_start(va, msg);
 463                 vfprintf(stderr, msg, va);
 464                 va_end(va);
 465         }
 466 }
 467
 468 static char *next_arg(char **s)
 469 {
 470         char *ret;
 471
 472         if (!s || !*s)
 473                 return NULL;
 474         while (isspace((unsigned char) **s))
 475                 (*s)++;
 476         if (!**s) {
 477                 *s = NULL;
 478                 return NULL;
 479         }
 480         if (**s == '"') {
 481                 ++*s;
 482                 ret = *s;
 483                 *s = strchr(*s, '"');
 484         } else {
 485                 ret = *s;
 486                 while (**s && !isspace((unsigned char) **s))
 487                         (*s)++;
 488         }
 489         if (*s) {
 490                 if (**s)
 491                         *(*s)++ = 0;
 492                 if (!**s)
 493                         *s = NULL;
 494         }
 495         return ret;
 496 }
 497
 498 static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
 499 {
 500         int ret;
 501         va_list va;
 502
 503         va_start(va, fmt);
 504         if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
 505                 die("Fatal: buffer too small. Please report a bug.");
 506         va_end(va);
 507         return ret;
 508 }
 509
 510 static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
 511                                          struct imap_cmd_cb *cb,
 512                                          const char *fmt, va_list ap)
 513 {
 514         struct imap *imap = ctx->imap;
 515         struct imap_cmd *cmd;
 516         int n, bufl;
 517         char buf[1024];
 518
 519         cmd = xmalloc(sizeof(struct imap_cmd));
 520         nfvasprintf(&cmd->cmd, fmt, ap);
 521         cmd->tag = ++imap->nexttag;
 522
 523         if (cb)
 524                 cmd->cb = *cb;
 525         else
 526                 memset(&cmd->cb, 0, sizeof(cmd->cb));
 527
 528         while (imap->literal_pending)
 529                 get_cmd_result(ctx, NULL);
 530
 531         if (!cmd->cb.data)
 532                 bufl = nfsnprintf(buf, sizeof(buf), "%d %s\r\n", cmd->tag, cmd->cmd);
 533         else
 534                 bufl = nfsnprintf(buf, sizeof(buf), "%d %s{%d%s}\r\n",
 535                                   cmd->tag, cmd->cmd, cmd->cb.dlen,
 536                                   CAP(LITERALPLUS) ? "+" : "");
 537
 538         if (Verbose) {
 539                 if (imap->num_in_progress)
 540                         printf("(%d in progress) ", imap->num_in_progress);
 541                 if (memcmp(cmd->cmd, "LOGIN", 5))
 542                         printf(">>> %s", buf);
 543                 else
 544                         printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
 545         }
 546         if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
 547                 free(cmd->cmd);
 548                 free(cmd);
 549                 if (cb)
 550                         free(cb->data);
 551                 return NULL;
 552         }
 553         if (cmd->cb.data) {
 554                 if (CAP(LITERALPLUS)) {
 555                         n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
 556                         free(cmd->cb.data);
 557                         if (n != cmd->cb.dlen ||
 558                             socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
 559                                 free(cmd->cmd);
 560                                 free(cmd);
 561                                 return NULL;
 562                         }
 563                         cmd->cb.data = NULL;
 564                 } else
 565                         imap->literal_pending = 1;
 566         } else if (cmd->cb.cont)
 567                 imap->literal_pending = 1;
 568         cmd->next = NULL;
 569         *imap->in_progress_append = cmd;
 570         imap->in_progress_append = &cmd->next;
 571         imap->num_in_progress++;
 572         return cmd;
 573 }
 574
 575 __attribute__((format (printf, 3, 4)))
 576 static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
 577                                        struct imap_cmd_cb *cb,
 578                                        const char *fmt, ...)
 579 {
 580         struct imap_cmd *ret;
 581         va_list ap;
 582
 583         va_start(ap, fmt);
 584         ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
 585         va_end(ap);
 586         return ret;
 587 }
 588
 589 __attribute__((format (printf, 3, 4)))
 590 static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
 591                      const char *fmt, ...)
 592 {
 593         va_list ap;
 594         struct imap_cmd *cmdp;
 595
 596         va_start(ap, fmt);
 597         cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 598         va_end(ap);
 599         if (!cmdp)
 600                 return RESP_BAD;
 601
 602         return get_cmd_result(ctx, cmdp);
 603 }
 604
 605 __attribute__((format (printf, 3, 4)))
 606 static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
 607                        const char *fmt, ...)
 608 {
 609         va_list ap;
 610         struct imap_cmd *cmdp;
 611
 612         va_start(ap, fmt);
 613         cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 614         va_end(ap);
 615         if (!cmdp)
 616                 return DRV_STORE_BAD;
 617
 618         switch (get_cmd_result(ctx, cmdp)) {
 619         case RESP_BAD: return DRV_STORE_BAD;
 620         case RESP_NO: return DRV_MSG_BAD;
 621         default: return DRV_OK;
 622         }
 623 }
 624
 625 static int skip_imap_list_l(char **sp, int level)
 626 {
 627         char *s = *sp;
 628
 629         for (;;) {
 630                 while (isspace((unsigned char)*s))
 631                         s++;
 632                 if (level && *s == ')') {
 633                         s++;
 634                         break;
 635                 }
 636                 if (*s == '(') {
 637                         /* sublist */
 638                         s++;
 639                         if (skip_imap_list_l(&s, level + 1))
 640                                 goto bail;
 641                 } else if (*s == '"') {
 642                         /* quoted string */
 643                         s++;
 644                         for (; *s != '"'; s++)
 645                                 if (!*s)
 646                                         goto bail;
 647                         s++;
 648                 } else {
 649                         /* atom */
 650                         for (; *s && !isspace((unsigned char)*s); s++)
 651                                 if (level && *s == ')')
 652                                         break;
 653                 }
 654
 655                 if (!level)
 656                         break;
 657                 if (!*s)
 658                         goto bail;
 659         }
 660         *sp = s;
 661         return 0;
 662
 663 bail:
 664         return -1;
 665 }
 666
 667 static void skip_list(char **sp)
 668 {
 669         skip_imap_list_l(sp, 0);
 670 }
 671
 672 static void parse_capability(struct imap *imap, char *cmd)
 673 {
 674         char *arg;
 675         unsigned i;
 676
 677         imap->caps = 0x80000000;
 678         while ((arg = next_arg(&cmd)))
 679                 for (i = 0; i < ARRAY_SIZE(cap_list); i++)
 680                         if (!strcmp(cap_list[i], arg))
 681                                 imap->caps |= 1 << i;
 682         imap->rcaps = imap->caps;
 683 }
 684
 685 static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
 686                                char *s)
 687 {
 688         struct imap *imap = ctx->imap;
 689         char *arg, *p;
 690
 691         if (*s != '[')
 692                 return RESP_OK;         /* no response code */
 693         s++;
 694         if (!(p = strchr(s, ']'))) {
 695                 fprintf(stderr, "IMAP error: malformed response code\n");
 696                 return RESP_BAD;
 697         }
 698         *p++ = 0;
 699         arg = next_arg(&s);
 700         if (!strcmp("UIDVALIDITY", arg)) {
 701                 if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg))) {
 702                         fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
 703                         return RESP_BAD;
 704                 }
 705         } else if (!strcmp("UIDNEXT", arg)) {
 706                 if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
 707                         fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
 708                         return RESP_BAD;
 709                 }
 710         } else if (!strcmp("CAPABILITY", arg)) {
 711                 parse_capability(imap, s);
 712         } else if (!strcmp("ALERT", arg)) {
 713                 /* RFC2060 says that these messages MUST be displayed
 714                  * to the user
 715                  */
 716                 for (; isspace((unsigned char)*p); p++);
 717                 fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
 718         } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
 719                 if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg)) ||
 720                     !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
 721                         fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
 722                         return RESP_BAD;
 723                 }
 724         }
 725         return RESP_OK;
 726 }
 727
 728 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
 729 {
 730         struct imap *imap = ctx->imap;
 731         struct imap_cmd *cmdp, **pcmdp, *ncmdp;
 732         char *cmd, *arg, *arg1, *p;
 733         int n, resp, resp2, tag;
 734
 735         for (;;) {
 736                 if (buffer_gets(&imap->buf, &cmd))
 737                         return RESP_BAD;
 738
 739                 arg = next_arg(&cmd);
 740                 if (*arg == '*') {
 741                         arg = next_arg(&cmd);
 742                         if (!arg) {
 743                                 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 744                                 return RESP_BAD;
 745                         }
 746
 747                         if (!strcmp("NAMESPACE", arg)) {
 748                                 /* rfc2342 NAMESPACE response. */
 749                                 skip_list(&cmd); /* Personal mailboxes */
 750                                 skip_list(&cmd); /* Others' mailboxes */
 751                                 skip_list(&cmd); /* Shared mailboxes */
 752                         } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
 753                                    !strcmp("NO", arg) || !strcmp("BYE", arg)) {
 754                                 if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
 755                                         return resp;
 756                         } else if (!strcmp("CAPABILITY", arg)) {
 757                                 parse_capability(imap, cmd);
 758                         } else if ((arg1 = next_arg(&cmd))) {
 759                                 ; /*
 760                                    * Unhandled response-data with at least two words.
 761                                    * Ignore it.
 762                                    *
 763                                    * NEEDSWORK: Previously this case handled '<num> EXISTS'
 764                                    * and '<num> RECENT' but as a probably-unintended side
 765                                    * effect it ignores other unrecognized two-word
 766                                    * responses.  imap-send doesn't ever try to read
 767                                    * messages or mailboxes these days, so consider
 768                                    * eliminating this case.
 769                                    */
 770                         } else {
 771                                 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 772                                 return RESP_BAD;
 773                         }
 774                 } else if (!imap->in_progress) {
 775                         fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
 776                         return RESP_BAD;
 777                 } else if (*arg == '+') {
 778                         /* This can happen only with the last command underway, as
 779                            it enforces a round-trip. */
 780                         cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
 781                                offsetof(struct imap_cmd, next));
 782                         if (cmdp->cb.data) {
 783                                 n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
 784                                 free(cmdp->cb.data);
 785                                 cmdp->cb.data = NULL;
 786                                 if (n != (int)cmdp->cb.dlen)
 787                                         return RESP_BAD;
 788                         } else if (cmdp->cb.cont) {
 789                                 if (cmdp->cb.cont(ctx, cmdp, cmd))
 790                                         return RESP_BAD;
 791                         } else {
 792                                 fprintf(stderr, "IMAP error: unexpected command continuation request\n");
 793                                 return RESP_BAD;
 794                         }
 795                         if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
 796                                 return RESP_BAD;
 797                         if (!cmdp->cb.cont)
 798                                 imap->literal_pending = 0;
 799                         if (!tcmd)
 800                                 return DRV_OK;
 801                 } else {
 802                         tag = atoi(arg);
 803                         for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
 804                                 if (cmdp->tag == tag)
 805                                         goto gottag;
 806                         fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
 807                         return RESP_BAD;
 808                 gottag:
 809                         if (!(*pcmdp = cmdp->next))
 810                                 imap->in_progress_append = pcmdp;
 811                         imap->num_in_progress--;
 812                         if (cmdp->cb.cont || cmdp->cb.data)
 813                                 imap->literal_pending = 0;
 814                         arg = next_arg(&cmd);
 815                         if (!strcmp("OK", arg))
 816                                 resp = DRV_OK;
 817                         else {
 818                                 if (!strcmp("NO", arg)) {
 819                                         if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
 820                                                 p = strchr(cmdp->cmd, '"');
 821                                                 if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", (int)(strchr(p + 1, '"') - p + 1), p)) {
 822                                                         resp = RESP_BAD;
 823                                                         goto normal;
 824                                                 }
 825                                                 /* not waiting here violates the spec, but a server that does not
 826                                                    grok this nonetheless violates it too. */
 827                                                 cmdp->cb.create = 0;
 828                                                 if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
 829                                                         resp = RESP_BAD;
 830                                                         goto normal;
 831                                                 }
 832                                                 free(cmdp->cmd);
 833                                                 free(cmdp);
 834                                                 if (!tcmd)
 835                                                         return 0;       /* ignored */
 836                                                 if (cmdp == tcmd)
 837                                                         tcmd = ncmdp;
 838                                                 continue;
 839                                         }
 840                                         resp = RESP_NO;
 841                                 } else /*if (!strcmp("BAD", arg))*/
 842                                         resp = RESP_BAD;
 843                                 fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
 844                                          memcmp(cmdp->cmd, "LOGIN", 5) ?
 845                                                         cmdp->cmd : "LOGIN <user> <pass>",
 846                                                         arg, cmd ? cmd : "");
 847                         }
 848                         if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
 849                                 resp = resp2;
 850                 normal:
 851                         if (cmdp->cb.done)
 852                                 cmdp->cb.done(ctx, cmdp, resp);
 853                         free(cmdp->cb.data);
 854                         free(cmdp->cmd);
 855                         free(cmdp);
 856                         if (!tcmd || tcmd == cmdp)
 857                                 return resp;
 858                 }
 859         }
 860         /* not reached */
 861 }
 862
 863 static void imap_close_server(struct imap_store *ictx)
 864 {
 865         struct imap *imap = ictx->imap;
 866
 867         if (imap->buf.sock.fd[0] != -1) {
 868                 imap_exec(ictx, NULL, "LOGOUT");
 869                 socket_shutdown(&imap->buf.sock);
 870         }
 871         free(imap);
 872 }
 873
 874 static void imap_close_store(struct imap_store *ctx)
 875 {
 876         imap_close_server(ctx);
 877         free(ctx);
 878 }
 879
 880 #ifndef NO_OPENSSL
 881
 882 /*
 883  * hexchar() and cram() functions are based on the code from the isync
 884  * project (http://isync.sf.net/).
 885  */
 886 static char hexchar(unsigned int b)
 887 {
 888         return b < 10 ? '0' + b : 'a' + (b - 10);
 889 }
 890
 891 #define ENCODED_SIZE(n) (4*((n+2)/3))
 892 static char *cram(const char *challenge_64, const char *user, const char *pass)
 893 {
 894         int i, resp_len, encoded_len, decoded_len;
 895         HMAC_CTX hmac;
 896         unsigned char hash[16];
 897         char hex[33];
 898         char *response, *response_64, *challenge;
 899
 900         /*
 901          * length of challenge_64 (i.e. base-64 encoded string) is a good
 902          * enough upper bound for challenge (decoded result).
 903          */
 904         encoded_len = strlen(challenge_64);
 905         challenge = xmalloc(encoded_len);
 906         decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
 907                                       (unsigned char *)challenge_64, encoded_len);
 908         if (decoded_len < 0)
 909                 die("invalid challenge %s", challenge_64);
 910         HMAC_Init(&hmac, (unsigned char *)pass, strlen(pass), EVP_md5());
 911         HMAC_Update(&hmac, (unsigned char *)challenge, decoded_len);
 912         HMAC_Final(&hmac, hash, NULL);
 913         HMAC_CTX_cleanup(&hmac);
 914
 915         hex[32] = 0;
 916         for (i = 0; i < 16; i++) {
 917                 hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
 918                 hex[2 * i + 1] = hexchar(hash[i] & 0xf);
 919         }
 920
 921         /* response: "<user> <digest in hex>" */
 922         resp_len = strlen(user) + 1 + strlen(hex) + 1;
 923         response = xmalloc(resp_len);
 924         sprintf(response, "%s %s", user, hex);
 925
 926         response_64 = xmalloc(ENCODED_SIZE(resp_len) + 1);
 927         encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
 928                                       (unsigned char *)response, resp_len);
 929         if (encoded_len < 0)
 930                 die("EVP_EncodeBlock error");
 931         response_64[encoded_len] = '\0';
 932         return (char *)response_64;
 933 }
 934
 935 #else
 936
 937 static char *cram(const char *challenge_64, const char *user, const char *pass)
 938 {
 939         die("If you want to use CRAM-MD5 authenticate method, "
 940             "you have to build git-imap-send with OpenSSL library.");
 941 }
 942
 943 #endif
 944
 945 static int auth_cram_md5(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt)
 946 {
 947         int ret;
 948         char *response;
 949
 950         response = cram(prompt, server.user, server.pass);
 951
 952         ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
 953         if (ret != strlen(response))
 954                 return error("IMAP error: sending response failed");
 955
 956         free(response);
 957
 958         return 0;
 959 }
 960
 961 static struct imap_store *imap_open_store(struct imap_server_conf *srvc)
 962 {
 963         struct imap_store *ctx;
 964         struct imap *imap;
 965         char *arg, *rsp;
 966         int s = -1, preauth;
 967
 968         ctx = xcalloc(sizeof(*ctx), 1);
 969
 970         ctx->imap = imap = xcalloc(sizeof(*imap), 1);
 971         imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
 972         imap->in_progress_append = &imap->in_progress;
 973
 974         /* open connection to IMAP server */
 975
 976         if (srvc->tunnel) {
 977                 const char *argv[] = { srvc->tunnel, NULL };
 978                 struct child_process tunnel = {NULL};
 979
 980                 imap_info("Starting tunnel '%s'... ", srvc->tunnel);
 981
 982                 tunnel.argv = argv;
 983                 tunnel.use_shell = 1;
 984                 tunnel.in = -1;
 985                 tunnel.out = -1;
 986                 if (start_command(&tunnel))
 987                         die("cannot start proxy %s", argv[0]);
 988
 989                 imap->buf.sock.fd[0] = tunnel.out;
 990                 imap->buf.sock.fd[1] = tunnel.in;
 991
 992                 imap_info("ok\n");
 993         } else {
 994 #ifndef NO_IPV6
 995                 struct addrinfo hints, *ai0, *ai;
 996                 int gai;
 997                 char portstr[6];
 998
 999                 snprintf(portstr, sizeof(portstr), "%d", srvc->port);
1000
1001                 memset(&hints, 0, sizeof(hints));
1002                 hints.ai_socktype = SOCK_STREAM;
1003                 hints.ai_protocol = IPPROTO_TCP;
1004
1005                 imap_info("Resolving %s... ", srvc->host);
1006                 gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
1007                 if (gai) {
1008                         fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
1009                         goto bail;
1010                 }
1011                 imap_info("ok\n");
1012
1013                 for (ai0 = ai; ai; ai = ai->ai_next) {
1014                         char addr[NI_MAXHOST];
1015
1016                         s = socket(ai->ai_family, ai->ai_socktype,
1017                                    ai->ai_protocol);
1018                         if (s < 0)
1019                                 continue;
1020
1021                         getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1022                                     sizeof(addr), NULL, 0, NI_NUMERICHOST);
1023                         imap_info("Connecting to [%s]:%s... ", addr, portstr);
1024
1025                         if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1026                                 close(s);
1027                                 s = -1;
1028                                 perror("connect");
1029                                 continue;
1030                         }
1031
1032                         break;
1033                 }
1034                 freeaddrinfo(ai0);
1035 #else /* NO_IPV6 */
1036                 struct hostent *he;
1037                 struct sockaddr_in addr;
1038
1039                 memset(&addr, 0, sizeof(addr));
1040                 addr.sin_port = htons(srvc->port);
1041                 addr.sin_family = AF_INET;
1042
1043                 imap_info("Resolving %s... ", srvc->host);
1044                 he = gethostbyname(srvc->host);
1045                 if (!he) {
1046                         perror("gethostbyname");
1047                         goto bail;
1048                 }
1049                 imap_info("ok\n");
1050
1051                 addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1052
1053                 s = socket(PF_INET, SOCK_STREAM, 0);
1054
1055                 imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1056                 if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1057                         close(s);
1058                         s = -1;
1059                         perror("connect");
1060                 }
1061 #endif
1062                 if (s < 0) {
1063                         fputs("Error: unable to connect to server.\n", stderr);
1064                         goto bail;
1065                 }
1066
1067                 imap->buf.sock.fd[0] = s;
1068                 imap->buf.sock.fd[1] = dup(s);
1069
1070                 if (srvc->use_ssl &&
1071                     ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1072                         close(s);
1073                         goto bail;
1074                 }
1075                 imap_info("ok\n");
1076         }
1077
1078         /* read the greeting string */
1079         if (buffer_gets(&imap->buf, &rsp)) {
1080                 fprintf(stderr, "IMAP error: no greeting response\n");
1081                 goto bail;
1082         }
1083         arg = next_arg(&rsp);
1084         if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1085                 fprintf(stderr, "IMAP error: invalid greeting response\n");
1086                 goto bail;
1087         }
1088         preauth = 0;
1089         if (!strcmp("PREAUTH", arg))
1090                 preauth = 1;
1091         else if (strcmp("OK", arg) != 0) {
1092                 fprintf(stderr, "IMAP error: unknown greeting response\n");
1093                 goto bail;
1094         }
1095         parse_response_code(ctx, NULL, rsp);
1096         if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1097                 goto bail;
1098
1099         if (!preauth) {
1100 #ifndef NO_OPENSSL
1101                 if (!srvc->use_ssl && CAP(STARTTLS)) {
1102                         if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK)
1103                                 goto bail;
1104                         if (ssl_socket_connect(&imap->buf.sock, 1,
1105                                                srvc->ssl_verify))
1106                                 goto bail;
1107                         /* capabilities may have changed, so get the new capabilities */
1108                         if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1109                                 goto bail;
1110                 }
1111 #endif
1112                 imap_info("Logging in...\n");
1113                 if (!srvc->user) {
1114                         fprintf(stderr, "Skipping server %s, no user\n", srvc->host);
1115                         goto bail;
1116                 }
1117                 if (!srvc->pass) {
1118                         struct strbuf prompt = STRBUF_INIT;
1119                         strbuf_addf(&prompt, "Password (%s@%s): ", srvc->user, srvc->host);
1120                         arg = git_getpass(prompt.buf);
1121                         strbuf_release(&prompt);
1122                         if (!*arg) {
1123                                 fprintf(stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host);
1124                                 goto bail;
1125                         }
1126                         /*
1127                          * getpass() returns a pointer to a static buffer.  make a copy
1128                          * for long term storage.
1129                          */
1130                         srvc->pass = xstrdup(arg);
1131                 }
1132                 if (CAP(NOLOGIN)) {
1133                         fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1134                         goto bail;
1135                 }
1136
1137                 if (srvc->auth_method) {
1138                         struct imap_cmd_cb cb;
1139
1140                         if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1141                                 if (!CAP(AUTH_CRAM_MD5)) {
1142                                         fprintf(stderr, "You specified"
1143                                                 "CRAM-MD5 as authentication method, "
1144                                                 "but %s doesn't support it.\n", srvc->host);
1145                                         goto bail;
1146                                 }
1147                                 /* CRAM-MD5 */
1148
1149                                 memset(&cb, 0, sizeof(cb));
1150                                 cb.cont = auth_cram_md5;
1151                                 if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1152                                         fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1153                                         goto bail;
1154                                 }
1155                         } else {
1156                                 fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1157                                 goto bail;
1158                         }
1159                 } else {
1160                         if (!imap->buf.sock.ssl)
1161                                 imap_warn("*** IMAP Warning *** Password is being "
1162                                           "sent in the clear\n");
1163                         if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1164                                 fprintf(stderr, "IMAP error: LOGIN failed\n");
1165                                 goto bail;
1166                         }
1167                 }
1168         } /* !preauth */
1169
1170         ctx->prefix = "";
1171         return ctx;
1172
1173 bail:
1174         imap_close_store(ctx);
1175         return NULL;
1176 }
1177
1178 /*
1179  * Insert CR characters as necessary in *msg to ensure that every LF
1180  * character in *msg is preceded by a CR.
1181  */
1182 static void lf_to_crlf(struct strbuf *msg)
1183 {
1184         char *new;
1185         size_t i, j;
1186         char lastc;
1187
1188         /* First pass: tally, in j, the size of the new string: */
1189         for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1190                 if (msg->buf[i] == '\n' && lastc != '\r')
1191                         j++; /* a CR will need to be added here */
1192                 lastc = msg->buf[i];
1193                 j++;
1194         }
1195
1196         new = xmalloc(j + 1);
1197
1198         /*
1199          * Second pass: write the new string.  Note that this loop is
1200          * otherwise identical to the first pass.
1201          */
1202         for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1203                 if (msg->buf[i] == '\n' && lastc != '\r')
1204                         new[j++] = '\r';
1205                 lastc = new[j++] = msg->buf[i];
1206         }
1207         strbuf_attach(msg, new, j, j + 1);
1208 }
1209
1210 /*
1211  * Store msg to IMAP.  Also detach and free the data from msg->data,
1212  * leaving msg->data empty.
1213  */
1214 static int imap_store_msg(struct imap_store *ctx, struct strbuf *msg)
1215 {
1216         struct imap *imap = ctx->imap;
1217         struct imap_cmd_cb cb;
1218         const char *prefix, *box;
1219         int ret;
1220
1221         lf_to_crlf(msg);
1222         memset(&cb, 0, sizeof(cb));
1223
1224         cb.dlen = msg->len;
1225         cb.data = strbuf_detach(msg, NULL);
1226
1227         box = ctx->name;
1228         prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1229         cb.create = 0;
1230         ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" ", prefix, box);
1231         imap->caps = imap->rcaps;
1232         if (ret != DRV_OK)
1233                 return ret;
1234
1235         return DRV_OK;
1236 }
1237
1238 static void wrap_in_html(struct strbuf *msg)
1239 {
1240         struct strbuf buf = STRBUF_INIT;
1241         static char *content_type = "Content-Type: text/html;\n";
1242         static char *pre_open = "<pre>\n";
1243         static char *pre_close = "</pre>\n";
1244         const char *body = strstr(msg->buf, "\n\n");
1245
1246         if (!body)
1247                 return; /* Headers but no body; no wrapping needed */
1248
1249         body += 2;
1250
1251         strbuf_add(&buf, msg->buf, body - msg->buf - 1);
1252         strbuf_addstr(&buf, content_type);
1253         strbuf_addch(&buf, '\n');
1254         strbuf_addstr(&buf, pre_open);
1255         strbuf_addstr_xml_quoted(&buf, body);
1256         strbuf_addstr(&buf, pre_close);
1257
1258         strbuf_release(msg);
1259         *msg = buf;
1260 }
1261
1262 #define CHUNKSIZE 0x1000
1263
1264 static int read_message(FILE *f, struct strbuf *all_msgs)
1265 {
1266         do {
1267                 if (strbuf_fread(all_msgs, CHUNKSIZE, f) <= 0)
1268                         break;
1269         } while (!feof(f));
1270
1271         return ferror(f) ? -1 : 0;
1272 }
1273
1274 static int count_messages(struct strbuf *all_msgs)
1275 {
1276         int count = 0;
1277         char *p = all_msgs->buf;
1278
1279         while (1) {
1280                 if (!prefixcmp(p, "From ")) {
1281                         p = strstr(p+5, "\nFrom: ");
1282                         if (!p) break;
1283                         p = strstr(p+7, "\nDate: ");
1284                         if (!p) break;
1285                         p = strstr(p+7, "\nSubject: ");
1286                         if (!p) break;
1287                         p += 10;
1288                         count++;
1289                 }
1290                 p = strstr(p+5, "\nFrom ");
1291                 if (!p)
1292                         break;
1293                 p++;
1294         }
1295         return count;
1296 }
1297
1298 /*
1299  * Copy the next message from all_msgs, starting at offset *ofs, to
1300  * msg.  Update *ofs to the start of the following message.  Return
1301  * true iff a message was successfully copied.
1302  */
1303 static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs)
1304 {
1305         char *p, *data;
1306         size_t len;
1307
1308         if (*ofs >= all_msgs->len)
1309                 return 0;
1310
1311         data = &all_msgs->buf[*ofs];
1312         len = all_msgs->len - *ofs;
1313
1314         if (len < 5 || prefixcmp(data, "From "))
1315                 return 0;
1316
1317         p = strchr(data, '\n');
1318         if (p) {
1319                 p++;
1320                 len -= p - data;
1321                 *ofs += p - data;
1322                 data = p;
1323         }
1324
1325         p = strstr(data, "\nFrom ");
1326         if (p)
1327                 len = &p[1] - data;
1328
1329         strbuf_add(msg, data, len);
1330         *ofs += len;
1331         return 1;
1332 }
1333
1334 static char *imap_folder;
1335
1336 static int git_imap_config(const char *key, const char *val, void *cb)
1337 {
1338         char imap_key[] = "imap.";
1339
1340         if (strncmp(key, imap_key, sizeof imap_key - 1))
1341                 return 0;
1342
1343         key += sizeof imap_key - 1;
1344
1345         /* check booleans first, and barf on others */
1346         if (!strcmp("sslverify", key))
1347                 server.ssl_verify = git_config_bool(key, val);
1348         else if (!strcmp("preformattedhtml", key))
1349                 server.use_html = git_config_bool(key, val);
1350         else if (!val)
1351                 return config_error_nonbool(key);
1352
1353         if (!strcmp("folder", key)) {
1354                 imap_folder = xstrdup(val);
1355         } else if (!strcmp("host", key)) {
1356                 if (!prefixcmp(val, "imap:"))
1357                         val += 5;
1358                 else if (!prefixcmp(val, "imaps:")) {
1359                         val += 6;
1360                         server.use_ssl = 1;
1361                 }
1362                 if (!prefixcmp(val, "//"))
1363                         val += 2;
1364                 server.host = xstrdup(val);
1365         } else if (!strcmp("user", key))
1366                 server.user = xstrdup(val);
1367         else if (!strcmp("pass", key))
1368                 server.pass = xstrdup(val);
1369         else if (!strcmp("port", key))
1370                 server.port = git_config_int(key, val);
1371         else if (!strcmp("tunnel", key))
1372                 server.tunnel = xstrdup(val);
1373         else if (!strcmp("authmethod", key))
1374                 server.auth_method = xstrdup(val);
1375
1376         return 0;
1377 }
1378
1379 int main(int argc, char **argv)
1380 {
1381         struct strbuf all_msgs = STRBUF_INIT;
1382         struct strbuf msg = STRBUF_INIT;
1383         struct imap_store *ctx = NULL;
1384         int ofs = 0;
1385         int r;
1386         int total, n = 0;
1387         int nongit_ok;
1388
1389         git_extract_argv0_path(argv[0]);
1390
1391         git_setup_gettext();
1392
1393         if (argc != 1)
1394                 usage(imap_send_usage);
1395
1396         setup_git_directory_gently(&nongit_ok);
1397         git_config(git_imap_config, NULL);
1398
1399         if (!server.port)
1400                 server.port = server.use_ssl ? 993 : 143;
1401
1402         if (!imap_folder) {
1403                 fprintf(stderr, "no imap store specified\n");
1404                 return 1;
1405         }
1406         if (!server.host) {
1407                 if (!server.tunnel) {
1408                         fprintf(stderr, "no imap host specified\n");
1409                         return 1;
1410                 }
1411                 server.host = "tunnel";
1412         }
1413
1414         /* read the messages */
1415         if (read_message(stdin, &all_msgs)) {
1416                 fprintf(stderr, "error reading input\n");
1417                 return 1;
1418         }
1419
1420         if (all_msgs.len == 0) {
1421                 fprintf(stderr, "nothing to send\n");
1422                 return 1;
1423         }
1424
1425         total = count_messages(&all_msgs);
1426         if (!total) {
1427                 fprintf(stderr, "no messages to send\n");
1428                 return 1;
1429         }
1430
1431         /* write it to the imap server */
1432         ctx = imap_open_store(&server);
1433         if (!ctx) {
1434                 fprintf(stderr, "failed to open store\n");
1435                 return 1;
1436         }
1437
1438         fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1439         ctx->name = imap_folder;
1440         while (1) {
1441                 unsigned percent = n * 100 / total;
1442
1443                 fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1444                 if (!split_msg(&all_msgs, &msg, &ofs))
1445                         break;
1446                 if (server.use_html)
1447                         wrap_in_html(&msg);
1448                 r = imap_store_msg(ctx, &msg);
1449                 if (r != DRV_OK)
1450                         break;
1451                 n++;
1452         }
1453         fprintf(stderr, "\n");
1454
1455         imap_close_store(ctx);
1456
1457         return 0;
1458 }