Andrew's git / gitweb.git / imap-send.c
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imap-send.con commit Merge branch 'jk/rebase-am-fork-point' (3dcacd7)
   1/*
   2 * git-imap-send - drops patches into an imap Drafts folder
   3 *                 derived from isync/mbsync - mailbox synchronizer
   4 *
   5 * Copyright (C) 2000-2002 Michael R. Elkins <me@mutt.org>
   6 * Copyright (C) 2002-2004 Oswald Buddenhagen <ossi@users.sf.net>
   7 * Copyright (C) 2004 Theodore Y. Ts'o <tytso@mit.edu>
   8 * Copyright (C) 2006 Mike McCormack
   9 *
  10 *  This program is free software; you can redistribute it and/or modify
  11 *  it under the terms of the GNU General Public License as published by
  12 *  the Free Software Foundation; either version 2 of the License, or
  13 *  (at your option) any later version.
  14 *
  15 *  This program is distributed in the hope that it will be useful,
  16 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 *  GNU General Public License for more details.
  19 *
  20 *  You should have received a copy of the GNU General Public License
  21 *  along with this program; if not, write to the Free Software
  22 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23 */
  24
  25#include "cache.h"
  26#include "credential.h"
  27#include "exec_cmd.h"
  28#include "run-command.h"
  29#ifdef NO_OPENSSL
  30typedef void *SSL;
  31#endif
  32
  33static const char imap_send_usage[] = "git imap-send < <mbox>";
  34
  35#undef DRV_OK
  36#define DRV_OK          0
  37#define DRV_MSG_BAD     -1
  38#define DRV_BOX_BAD     -2
  39#define DRV_STORE_BAD   -3
  40
  41static int Verbose, Quiet;
  42
  43__attribute__((format (printf, 1, 2)))
  44static void imap_info(const char *, ...);
  45__attribute__((format (printf, 1, 2)))
  46static void imap_warn(const char *, ...);
  47
  48static char *next_arg(char **);
  49
  50__attribute__((format (printf, 3, 4)))
  51static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
  52
  53static int nfvasprintf(char **strp, const char *fmt, va_list ap)
  54{
  55        int len;
  56        char tmp[8192];
  57
  58        len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
  59        if (len < 0)
  60                die("Fatal: Out of memory");
  61        if (len >= sizeof(tmp))
  62                die("imap command overflow!");
  63        *strp = xmemdupz(tmp, len);
  64        return len;
  65}
  66
  67struct imap_server_conf {
  68        char *name;
  69        char *tunnel;
  70        char *host;
  71        int port;
  72        char *user;
  73        char *pass;
  74        int use_ssl;
  75        int ssl_verify;
  76        int use_html;
  77        char *auth_method;
  78};
  79
  80static struct imap_server_conf server = {
  81        NULL,   /* name */
  82        NULL,   /* tunnel */
  83        NULL,   /* host */
  84        0,      /* port */
  85        NULL,   /* user */
  86        NULL,   /* pass */
  87        0,      /* use_ssl */
  88        1,      /* ssl_verify */
  89        0,      /* use_html */
  90        NULL,   /* auth_method */
  91};
  92
  93struct imap_socket {
  94        int fd[2];
  95        SSL *ssl;
  96};
  97
  98struct imap_buffer {
  99        struct imap_socket sock;
 100        int bytes;
 101        int offset;
 102        char buf[1024];
 103};
 104
 105struct imap_cmd;
 106
 107struct imap {
 108        int uidnext; /* from SELECT responses */
 109        unsigned caps, rcaps; /* CAPABILITY results */
 110        /* command queue */
 111        int nexttag, num_in_progress, literal_pending;
 112        struct imap_cmd *in_progress, **in_progress_append;
 113        struct imap_buffer buf; /* this is BIG, so put it last */
 114};
 115
 116struct imap_store {
 117        /* currently open mailbox */
 118        const char *name; /* foreign! maybe preset? */
 119        int uidvalidity;
 120        struct imap *imap;
 121        const char *prefix;
 122};
 123
 124struct imap_cmd_cb {
 125        int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
 126        void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
 127        void *ctx;
 128        char *data;
 129        int dlen;
 130        int uid;
 131        unsigned create:1, trycreate:1;
 132};
 133
 134struct imap_cmd {
 135        struct imap_cmd *next;
 136        struct imap_cmd_cb cb;
 137        char *cmd;
 138        int tag;
 139};
 140
 141#define CAP(cap) (imap->caps & (1 << (cap)))
 142
 143enum CAPABILITY {
 144        NOLOGIN = 0,
 145        UIDPLUS,
 146        LITERALPLUS,
 147        NAMESPACE,
 148        STARTTLS,
 149        AUTH_CRAM_MD5
 150};
 151
 152static const char *cap_list[] = {
 153        "LOGINDISABLED",
 154        "UIDPLUS",
 155        "LITERAL+",
 156        "NAMESPACE",
 157        "STARTTLS",
 158        "AUTH=CRAM-MD5",
 159};
 160
 161#define RESP_OK    0
 162#define RESP_NO    1
 163#define RESP_BAD   2
 164
 165static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
 166
 167
 168#ifndef NO_OPENSSL
 169static void ssl_socket_perror(const char *func)
 170{
 171        fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
 172}
 173#endif
 174
 175static void socket_perror(const char *func, struct imap_socket *sock, int ret)
 176{
 177#ifndef NO_OPENSSL
 178        if (sock->ssl) {
 179                int sslerr = SSL_get_error(sock->ssl, ret);
 180                switch (sslerr) {
 181                case SSL_ERROR_NONE:
 182                        break;
 183                case SSL_ERROR_SYSCALL:
 184                        perror("SSL_connect");
 185                        break;
 186                default:
 187                        ssl_socket_perror("SSL_connect");
 188                        break;
 189                }
 190        } else
 191#endif
 192        {
 193                if (ret < 0)
 194                        perror(func);
 195                else
 196                        fprintf(stderr, "%s: unexpected EOF\n", func);
 197        }
 198}
 199
 200#ifdef NO_OPENSSL
 201static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 202{
 203        fprintf(stderr, "SSL requested but SSL support not compiled in\n");
 204        return -1;
 205}
 206
 207#else
 208
 209static int host_matches(const char *host, const char *pattern)
 210{
 211        if (pattern[0] == '*' && pattern[1] == '.') {
 212                pattern += 2;
 213                if (!(host = strchr(host, '.')))
 214                        return 0;
 215                host++;
 216        }
 217
 218        return *host && *pattern && !strcasecmp(host, pattern);
 219}
 220
 221static int verify_hostname(X509 *cert, const char *hostname)
 222{
 223        int len;
 224        X509_NAME *subj;
 225        char cname[1000];
 226        int i, found;
 227        STACK_OF(GENERAL_NAME) *subj_alt_names;
 228
 229        /* try the DNS subjectAltNames */
 230        found = 0;
 231        if ((subj_alt_names = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL))) {
 232                int num_subj_alt_names = sk_GENERAL_NAME_num(subj_alt_names);
 233                for (i = 0; !found && i < num_subj_alt_names; i++) {
 234                        GENERAL_NAME *subj_alt_name = sk_GENERAL_NAME_value(subj_alt_names, i);
 235                        if (subj_alt_name->type == GEN_DNS &&
 236                            strlen((const char *)subj_alt_name->d.ia5->data) == (size_t)subj_alt_name->d.ia5->length &&
 237                            host_matches(hostname, (const char *)(subj_alt_name->d.ia5->data)))
 238                                found = 1;
 239                }
 240                sk_GENERAL_NAME_pop_free(subj_alt_names, GENERAL_NAME_free);
 241        }
 242        if (found)
 243                return 0;
 244
 245        /* try the common name */
 246        if (!(subj = X509_get_subject_name(cert)))
 247                return error("cannot get certificate subject");
 248        if ((len = X509_NAME_get_text_by_NID(subj, NID_commonName, cname, sizeof(cname))) < 0)
 249                return error("cannot get certificate common name");
 250        if (strlen(cname) == (size_t)len && host_matches(hostname, cname))
 251                return 0;
 252        return error("certificate owner '%s' does not match hostname '%s'",
 253                     cname, hostname);
 254}
 255
 256static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 257{
 258#if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
 259        const SSL_METHOD *meth;
 260#else
 261        SSL_METHOD *meth;
 262#endif
 263        SSL_CTX *ctx;
 264        int ret;
 265        X509 *cert;
 266
 267        SSL_library_init();
 268        SSL_load_error_strings();
 269
 270        if (use_tls_only)
 271                meth = TLSv1_method();
 272        else
 273                meth = SSLv23_method();
 274
 275        if (!meth) {
 276                ssl_socket_perror("SSLv23_method");
 277                return -1;
 278        }
 279
 280        ctx = SSL_CTX_new(meth);
 281
 282        if (verify)
 283                SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
 284
 285        if (!SSL_CTX_set_default_verify_paths(ctx)) {
 286                ssl_socket_perror("SSL_CTX_set_default_verify_paths");
 287                return -1;
 288        }
 289        sock->ssl = SSL_new(ctx);
 290        if (!sock->ssl) {
 291                ssl_socket_perror("SSL_new");
 292                return -1;
 293        }
 294        if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
 295                ssl_socket_perror("SSL_set_rfd");
 296                return -1;
 297        }
 298        if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
 299                ssl_socket_perror("SSL_set_wfd");
 300                return -1;
 301        }
 302
 303#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
 304        /*
 305         * SNI (RFC4366)
 306         * OpenSSL does not document this function, but the implementation
 307         * returns 1 on success, 0 on failure after calling SSLerr().
 308         */
 309        ret = SSL_set_tlsext_host_name(sock->ssl, server.host);
 310        if (ret != 1)
 311                warning("SSL_set_tlsext_host_name(%s) failed.", server.host);
 312#endif
 313
 314        ret = SSL_connect(sock->ssl);
 315        if (ret <= 0) {
 316                socket_perror("SSL_connect", sock, ret);
 317                return -1;
 318        }
 319
 320        if (verify) {
 321                /* make sure the hostname matches that of the certificate */
 322                cert = SSL_get_peer_certificate(sock->ssl);
 323                if (!cert)
 324                        return error("unable to get peer certificate.");
 325                if (verify_hostname(cert, server.host) < 0)
 326                        return -1;
 327        }
 328
 329        return 0;
 330}
 331#endif
 332
 333static int socket_read(struct imap_socket *sock, char *buf, int len)
 334{
 335        ssize_t n;
 336#ifndef NO_OPENSSL
 337        if (sock->ssl)
 338                n = SSL_read(sock->ssl, buf, len);
 339        else
 340#endif
 341                n = xread(sock->fd[0], buf, len);
 342        if (n <= 0) {
 343                socket_perror("read", sock, n);
 344                close(sock->fd[0]);
 345                close(sock->fd[1]);
 346                sock->fd[0] = sock->fd[1] = -1;
 347        }
 348        return n;
 349}
 350
 351static int socket_write(struct imap_socket *sock, const char *buf, int len)
 352{
 353        int n;
 354#ifndef NO_OPENSSL
 355        if (sock->ssl)
 356                n = SSL_write(sock->ssl, buf, len);
 357        else
 358#endif
 359                n = write_in_full(sock->fd[1], buf, len);
 360        if (n != len) {
 361                socket_perror("write", sock, n);
 362                close(sock->fd[0]);
 363                close(sock->fd[1]);
 364                sock->fd[0] = sock->fd[1] = -1;
 365        }
 366        return n;
 367}
 368
 369static void socket_shutdown(struct imap_socket *sock)
 370{
 371#ifndef NO_OPENSSL
 372        if (sock->ssl) {
 373                SSL_shutdown(sock->ssl);
 374                SSL_free(sock->ssl);
 375        }
 376#endif
 377        close(sock->fd[0]);
 378        close(sock->fd[1]);
 379}
 380
 381/* simple line buffering */
 382static int buffer_gets(struct imap_buffer *b, char **s)
 383{
 384        int n;
 385        int start = b->offset;
 386
 387        *s = b->buf + start;
 388
 389        for (;;) {
 390                /* make sure we have enough data to read the \r\n sequence */
 391                if (b->offset + 1 >= b->bytes) {
 392                        if (start) {
 393                                /* shift down used bytes */
 394                                *s = b->buf;
 395
 396                                assert(start <= b->bytes);
 397                                n = b->bytes - start;
 398
 399                                if (n)
 400                                        memmove(b->buf, b->buf + start, n);
 401                                b->offset -= start;
 402                                b->bytes = n;
 403                                start = 0;
 404                        }
 405
 406                        n = socket_read(&b->sock, b->buf + b->bytes,
 407                                         sizeof(b->buf) - b->bytes);
 408
 409                        if (n <= 0)
 410                                return -1;
 411
 412                        b->bytes += n;
 413                }
 414
 415                if (b->buf[b->offset] == '\r') {
 416                        assert(b->offset + 1 < b->bytes);
 417                        if (b->buf[b->offset + 1] == '\n') {
 418                                b->buf[b->offset] = 0;  /* terminate the string */
 419                                b->offset += 2; /* next line */
 420                                if (Verbose)
 421                                        puts(*s);
 422                                return 0;
 423                        }
 424                }
 425
 426                b->offset++;
 427        }
 428        /* not reached */
 429}
 430
 431static void imap_info(const char *msg, ...)
 432{
 433        va_list va;
 434
 435        if (!Quiet) {
 436                va_start(va, msg);
 437                vprintf(msg, va);
 438                va_end(va);
 439                fflush(stdout);
 440        }
 441}
 442
 443static void imap_warn(const char *msg, ...)
 444{
 445        va_list va;
 446
 447        if (Quiet < 2) {
 448                va_start(va, msg);
 449                vfprintf(stderr, msg, va);
 450                va_end(va);
 451        }
 452}
 453
 454static char *next_arg(char **s)
 455{
 456        char *ret;
 457
 458        if (!s || !*s)
 459                return NULL;
 460        while (isspace((unsigned char) **s))
 461                (*s)++;
 462        if (!**s) {
 463                *s = NULL;
 464                return NULL;
 465        }
 466        if (**s == '"') {
 467                ++*s;
 468                ret = *s;
 469                *s = strchr(*s, '"');
 470        } else {
 471                ret = *s;
 472                while (**s && !isspace((unsigned char) **s))
 473                        (*s)++;
 474        }
 475        if (*s) {
 476                if (**s)
 477                        *(*s)++ = 0;
 478                if (!**s)
 479                        *s = NULL;
 480        }
 481        return ret;
 482}
 483
 484static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
 485{
 486        int ret;
 487        va_list va;
 488
 489        va_start(va, fmt);
 490        if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
 491                die("Fatal: buffer too small. Please report a bug.");
 492        va_end(va);
 493        return ret;
 494}
 495
 496static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
 497                                         struct imap_cmd_cb *cb,
 498                                         const char *fmt, va_list ap)
 499{
 500        struct imap *imap = ctx->imap;
 501        struct imap_cmd *cmd;
 502        int n, bufl;
 503        char buf[1024];
 504
 505        cmd = xmalloc(sizeof(struct imap_cmd));
 506        nfvasprintf(&cmd->cmd, fmt, ap);
 507        cmd->tag = ++imap->nexttag;
 508
 509        if (cb)
 510                cmd->cb = *cb;
 511        else
 512                memset(&cmd->cb, 0, sizeof(cmd->cb));
 513
 514        while (imap->literal_pending)
 515                get_cmd_result(ctx, NULL);
 516
 517        if (!cmd->cb.data)
 518                bufl = nfsnprintf(buf, sizeof(buf), "%d %s\r\n", cmd->tag, cmd->cmd);
 519        else
 520                bufl = nfsnprintf(buf, sizeof(buf), "%d %s{%d%s}\r\n",
 521                                  cmd->tag, cmd->cmd, cmd->cb.dlen,
 522                                  CAP(LITERALPLUS) ? "+" : "");
 523
 524        if (Verbose) {
 525                if (imap->num_in_progress)
 526                        printf("(%d in progress) ", imap->num_in_progress);
 527                if (memcmp(cmd->cmd, "LOGIN", 5))
 528                        printf(">>> %s", buf);
 529                else
 530                        printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
 531        }
 532        if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
 533                free(cmd->cmd);
 534                free(cmd);
 535                if (cb)
 536                        free(cb->data);
 537                return NULL;
 538        }
 539        if (cmd->cb.data) {
 540                if (CAP(LITERALPLUS)) {
 541                        n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
 542                        free(cmd->cb.data);
 543                        if (n != cmd->cb.dlen ||
 544                            socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
 545                                free(cmd->cmd);
 546                                free(cmd);
 547                                return NULL;
 548                        }
 549                        cmd->cb.data = NULL;
 550                } else
 551                        imap->literal_pending = 1;
 552        } else if (cmd->cb.cont)
 553                imap->literal_pending = 1;
 554        cmd->next = NULL;
 555        *imap->in_progress_append = cmd;
 556        imap->in_progress_append = &cmd->next;
 557        imap->num_in_progress++;
 558        return cmd;
 559}
 560
 561__attribute__((format (printf, 3, 4)))
 562static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
 563                                       struct imap_cmd_cb *cb,
 564                                       const char *fmt, ...)
 565{
 566        struct imap_cmd *ret;
 567        va_list ap;
 568
 569        va_start(ap, fmt);
 570        ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
 571        va_end(ap);
 572        return ret;
 573}
 574
 575__attribute__((format (printf, 3, 4)))
 576static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
 577                     const char *fmt, ...)
 578{
 579        va_list ap;
 580        struct imap_cmd *cmdp;
 581
 582        va_start(ap, fmt);
 583        cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 584        va_end(ap);
 585        if (!cmdp)
 586                return RESP_BAD;
 587
 588        return get_cmd_result(ctx, cmdp);
 589}
 590
 591__attribute__((format (printf, 3, 4)))
 592static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
 593                       const char *fmt, ...)
 594{
 595        va_list ap;
 596        struct imap_cmd *cmdp;
 597
 598        va_start(ap, fmt);
 599        cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 600        va_end(ap);
 601        if (!cmdp)
 602                return DRV_STORE_BAD;
 603
 604        switch (get_cmd_result(ctx, cmdp)) {
 605        case RESP_BAD: return DRV_STORE_BAD;
 606        case RESP_NO: return DRV_MSG_BAD;
 607        default: return DRV_OK;
 608        }
 609}
 610
 611static int skip_imap_list_l(char **sp, int level)
 612{
 613        char *s = *sp;
 614
 615        for (;;) {
 616                while (isspace((unsigned char)*s))
 617                        s++;
 618                if (level && *s == ')') {
 619                        s++;
 620                        break;
 621                }
 622                if (*s == '(') {
 623                        /* sublist */
 624                        s++;
 625                        if (skip_imap_list_l(&s, level + 1))
 626                                goto bail;
 627                } else if (*s == '"') {
 628                        /* quoted string */
 629                        s++;
 630                        for (; *s != '"'; s++)
 631                                if (!*s)
 632                                        goto bail;
 633                        s++;
 634                } else {
 635                        /* atom */
 636                        for (; *s && !isspace((unsigned char)*s); s++)
 637                                if (level && *s == ')')
 638                                        break;
 639                }
 640
 641                if (!level)
 642                        break;
 643                if (!*s)
 644                        goto bail;
 645        }
 646        *sp = s;
 647        return 0;
 648
 649bail:
 650        return -1;
 651}
 652
 653static void skip_list(char **sp)
 654{
 655        skip_imap_list_l(sp, 0);
 656}
 657
 658static void parse_capability(struct imap *imap, char *cmd)
 659{
 660        char *arg;
 661        unsigned i;
 662
 663        imap->caps = 0x80000000;
 664        while ((arg = next_arg(&cmd)))
 665                for (i = 0; i < ARRAY_SIZE(cap_list); i++)
 666                        if (!strcmp(cap_list[i], arg))
 667                                imap->caps |= 1 << i;
 668        imap->rcaps = imap->caps;
 669}
 670
 671static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
 672                               char *s)
 673{
 674        struct imap *imap = ctx->imap;
 675        char *arg, *p;
 676
 677        if (*s != '[')
 678                return RESP_OK;         /* no response code */
 679        s++;
 680        if (!(p = strchr(s, ']'))) {
 681                fprintf(stderr, "IMAP error: malformed response code\n");
 682                return RESP_BAD;
 683        }
 684        *p++ = 0;
 685        arg = next_arg(&s);
 686        if (!strcmp("UIDVALIDITY", arg)) {
 687                if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg))) {
 688                        fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
 689                        return RESP_BAD;
 690                }
 691        } else if (!strcmp("UIDNEXT", arg)) {
 692                if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
 693                        fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
 694                        return RESP_BAD;
 695                }
 696        } else if (!strcmp("CAPABILITY", arg)) {
 697                parse_capability(imap, s);
 698        } else if (!strcmp("ALERT", arg)) {
 699                /* RFC2060 says that these messages MUST be displayed
 700                 * to the user
 701                 */
 702                for (; isspace((unsigned char)*p); p++);
 703                fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
 704        } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
 705                if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg)) ||
 706                    !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
 707                        fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
 708                        return RESP_BAD;
 709                }
 710        }
 711        return RESP_OK;
 712}
 713
 714static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
 715{
 716        struct imap *imap = ctx->imap;
 717        struct imap_cmd *cmdp, **pcmdp, *ncmdp;
 718        char *cmd, *arg, *arg1, *p;
 719        int n, resp, resp2, tag;
 720
 721        for (;;) {
 722                if (buffer_gets(&imap->buf, &cmd))
 723                        return RESP_BAD;
 724
 725                arg = next_arg(&cmd);
 726                if (*arg == '*') {
 727                        arg = next_arg(&cmd);
 728                        if (!arg) {
 729                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 730                                return RESP_BAD;
 731                        }
 732
 733                        if (!strcmp("NAMESPACE", arg)) {
 734                                /* rfc2342 NAMESPACE response. */
 735                                skip_list(&cmd); /* Personal mailboxes */
 736                                skip_list(&cmd); /* Others' mailboxes */
 737                                skip_list(&cmd); /* Shared mailboxes */
 738                        } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
 739                                   !strcmp("NO", arg) || !strcmp("BYE", arg)) {
 740                                if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
 741                                        return resp;
 742                        } else if (!strcmp("CAPABILITY", arg)) {
 743                                parse_capability(imap, cmd);
 744                        } else if ((arg1 = next_arg(&cmd))) {
 745                                ; /*
 746                                   * Unhandled response-data with at least two words.
 747                                   * Ignore it.
 748                                   *
 749                                   * NEEDSWORK: Previously this case handled '<num> EXISTS'
 750                                   * and '<num> RECENT' but as a probably-unintended side
 751                                   * effect it ignores other unrecognized two-word
 752                                   * responses.  imap-send doesn't ever try to read
 753                                   * messages or mailboxes these days, so consider
 754                                   * eliminating this case.
 755                                   */
 756                        } else {
 757                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 758                                return RESP_BAD;
 759                        }
 760                } else if (!imap->in_progress) {
 761                        fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
 762                        return RESP_BAD;
 763                } else if (*arg == '+') {
 764                        /* This can happen only with the last command underway, as
 765                           it enforces a round-trip. */
 766                        cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
 767                               offsetof(struct imap_cmd, next));
 768                        if (cmdp->cb.data) {
 769                                n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
 770                                free(cmdp->cb.data);
 771                                cmdp->cb.data = NULL;
 772                                if (n != (int)cmdp->cb.dlen)
 773                                        return RESP_BAD;
 774                        } else if (cmdp->cb.cont) {
 775                                if (cmdp->cb.cont(ctx, cmdp, cmd))
 776                                        return RESP_BAD;
 777                        } else {
 778                                fprintf(stderr, "IMAP error: unexpected command continuation request\n");
 779                                return RESP_BAD;
 780                        }
 781                        if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
 782                                return RESP_BAD;
 783                        if (!cmdp->cb.cont)
 784                                imap->literal_pending = 0;
 785                        if (!tcmd)
 786                                return DRV_OK;
 787                } else {
 788                        tag = atoi(arg);
 789                        for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
 790                                if (cmdp->tag == tag)
 791                                        goto gottag;
 792                        fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
 793                        return RESP_BAD;
 794                gottag:
 795                        if (!(*pcmdp = cmdp->next))
 796                                imap->in_progress_append = pcmdp;
 797                        imap->num_in_progress--;
 798                        if (cmdp->cb.cont || cmdp->cb.data)
 799                                imap->literal_pending = 0;
 800                        arg = next_arg(&cmd);
 801                        if (!strcmp("OK", arg))
 802                                resp = DRV_OK;
 803                        else {
 804                                if (!strcmp("NO", arg)) {
 805                                        if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
 806                                                p = strchr(cmdp->cmd, '"');
 807                                                if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", (int)(strchr(p + 1, '"') - p + 1), p)) {
 808                                                        resp = RESP_BAD;
 809                                                        goto normal;
 810                                                }
 811                                                /* not waiting here violates the spec, but a server that does not
 812                                                   grok this nonetheless violates it too. */
 813                                                cmdp->cb.create = 0;
 814                                                if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
 815                                                        resp = RESP_BAD;
 816                                                        goto normal;
 817                                                }
 818                                                free(cmdp->cmd);
 819                                                free(cmdp);
 820                                                if (!tcmd)
 821                                                        return 0;       /* ignored */
 822                                                if (cmdp == tcmd)
 823                                                        tcmd = ncmdp;
 824                                                continue;
 825                                        }
 826                                        resp = RESP_NO;
 827                                } else /*if (!strcmp("BAD", arg))*/
 828                                        resp = RESP_BAD;
 829                                fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
 830                                         memcmp(cmdp->cmd, "LOGIN", 5) ?
 831                                                        cmdp->cmd : "LOGIN <user> <pass>",
 832                                                        arg, cmd ? cmd : "");
 833                        }
 834                        if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
 835                                resp = resp2;
 836                normal:
 837                        if (cmdp->cb.done)
 838                                cmdp->cb.done(ctx, cmdp, resp);
 839                        free(cmdp->cb.data);
 840                        free(cmdp->cmd);
 841                        free(cmdp);
 842                        if (!tcmd || tcmd == cmdp)
 843                                return resp;
 844                }
 845        }
 846        /* not reached */
 847}
 848
 849static void imap_close_server(struct imap_store *ictx)
 850{
 851        struct imap *imap = ictx->imap;
 852
 853        if (imap->buf.sock.fd[0] != -1) {
 854                imap_exec(ictx, NULL, "LOGOUT");
 855                socket_shutdown(&imap->buf.sock);
 856        }
 857        free(imap);
 858}
 859
 860static void imap_close_store(struct imap_store *ctx)
 861{
 862        imap_close_server(ctx);
 863        free(ctx);
 864}
 865
 866#ifndef NO_OPENSSL
 867
 868/*
 869 * hexchar() and cram() functions are based on the code from the isync
 870 * project (http://isync.sf.net/).
 871 */
 872static char hexchar(unsigned int b)
 873{
 874        return b < 10 ? '0' + b : 'a' + (b - 10);
 875}
 876
 877#define ENCODED_SIZE(n) (4*((n+2)/3))
 878static char *cram(const char *challenge_64, const char *user, const char *pass)
 879{
 880        int i, resp_len, encoded_len, decoded_len;
 881        HMAC_CTX hmac;
 882        unsigned char hash[16];
 883        char hex[33];
 884        char *response, *response_64, *challenge;
 885
 886        /*
 887         * length of challenge_64 (i.e. base-64 encoded string) is a good
 888         * enough upper bound for challenge (decoded result).
 889         */
 890        encoded_len = strlen(challenge_64);
 891        challenge = xmalloc(encoded_len);
 892        decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
 893                                      (unsigned char *)challenge_64, encoded_len);
 894        if (decoded_len < 0)
 895                die("invalid challenge %s", challenge_64);
 896        HMAC_Init(&hmac, (unsigned char *)pass, strlen(pass), EVP_md5());
 897        HMAC_Update(&hmac, (unsigned char *)challenge, decoded_len);
 898        HMAC_Final(&hmac, hash, NULL);
 899        HMAC_CTX_cleanup(&hmac);
 900
 901        hex[32] = 0;
 902        for (i = 0; i < 16; i++) {
 903                hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
 904                hex[2 * i + 1] = hexchar(hash[i] & 0xf);
 905        }
 906
 907        /* response: "<user> <digest in hex>" */
 908        resp_len = strlen(user) + 1 + strlen(hex) + 1;
 909        response = xmalloc(resp_len);
 910        sprintf(response, "%s %s", user, hex);
 911
 912        response_64 = xmalloc(ENCODED_SIZE(resp_len) + 1);
 913        encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
 914                                      (unsigned char *)response, resp_len);
 915        if (encoded_len < 0)
 916                die("EVP_EncodeBlock error");
 917        response_64[encoded_len] = '\0';
 918        return (char *)response_64;
 919}
 920
 921#else
 922
 923static char *cram(const char *challenge_64, const char *user, const char *pass)
 924{
 925        die("If you want to use CRAM-MD5 authenticate method, "
 926            "you have to build git-imap-send with OpenSSL library.");
 927}
 928
 929#endif
 930
 931static int auth_cram_md5(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt)
 932{
 933        int ret;
 934        char *response;
 935
 936        response = cram(prompt, server.user, server.pass);
 937
 938        ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
 939        if (ret != strlen(response))
 940                return error("IMAP error: sending response failed");
 941
 942        free(response);
 943
 944        return 0;
 945}
 946
 947static struct imap_store *imap_open_store(struct imap_server_conf *srvc)
 948{
 949        struct credential cred = CREDENTIAL_INIT;
 950        struct imap_store *ctx;
 951        struct imap *imap;
 952        char *arg, *rsp;
 953        int s = -1, preauth;
 954
 955        ctx = xcalloc(1, sizeof(*ctx));
 956
 957        ctx->imap = imap = xcalloc(sizeof(*imap), 1);
 958        imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
 959        imap->in_progress_append = &imap->in_progress;
 960
 961        /* open connection to IMAP server */
 962
 963        if (srvc->tunnel) {
 964                const char *argv[] = { srvc->tunnel, NULL };
 965                struct child_process tunnel = {NULL};
 966
 967                imap_info("Starting tunnel '%s'... ", srvc->tunnel);
 968
 969                tunnel.argv = argv;
 970                tunnel.use_shell = 1;
 971                tunnel.in = -1;
 972                tunnel.out = -1;
 973                if (start_command(&tunnel))
 974                        die("cannot start proxy %s", argv[0]);
 975
 976                imap->buf.sock.fd[0] = tunnel.out;
 977                imap->buf.sock.fd[1] = tunnel.in;
 978
 979                imap_info("ok\n");
 980        } else {
 981#ifndef NO_IPV6
 982                struct addrinfo hints, *ai0, *ai;
 983                int gai;
 984                char portstr[6];
 985
 986                snprintf(portstr, sizeof(portstr), "%d", srvc->port);
 987
 988                memset(&hints, 0, sizeof(hints));
 989                hints.ai_socktype = SOCK_STREAM;
 990                hints.ai_protocol = IPPROTO_TCP;
 991
 992                imap_info("Resolving %s... ", srvc->host);
 993                gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
 994                if (gai) {
 995                        fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
 996                        goto bail;
 997                }
 998                imap_info("ok\n");
 999
1000                for (ai0 = ai; ai; ai = ai->ai_next) {
1001                        char addr[NI_MAXHOST];
1002
1003                        s = socket(ai->ai_family, ai->ai_socktype,
1004                                   ai->ai_protocol);
1005                        if (s < 0)
1006                                continue;
1007
1008                        getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1009                                    sizeof(addr), NULL, 0, NI_NUMERICHOST);
1010                        imap_info("Connecting to [%s]:%s... ", addr, portstr);
1011
1012                        if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1013                                close(s);
1014                                s = -1;
1015                                perror("connect");
1016                                continue;
1017                        }
1018
1019                        break;
1020                }
1021                freeaddrinfo(ai0);
1022#else /* NO_IPV6 */
1023                struct hostent *he;
1024                struct sockaddr_in addr;
1025
1026                memset(&addr, 0, sizeof(addr));
1027                addr.sin_port = htons(srvc->port);
1028                addr.sin_family = AF_INET;
1029
1030                imap_info("Resolving %s... ", srvc->host);
1031                he = gethostbyname(srvc->host);
1032                if (!he) {
1033                        perror("gethostbyname");
1034                        goto bail;
1035                }
1036                imap_info("ok\n");
1037
1038                addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1039
1040                s = socket(PF_INET, SOCK_STREAM, 0);
1041
1042                imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1043                if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1044                        close(s);
1045                        s = -1;
1046                        perror("connect");
1047                }
1048#endif
1049                if (s < 0) {
1050                        fputs("Error: unable to connect to server.\n", stderr);
1051                        goto bail;
1052                }
1053
1054                imap->buf.sock.fd[0] = s;
1055                imap->buf.sock.fd[1] = dup(s);
1056
1057                if (srvc->use_ssl &&
1058                    ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1059                        close(s);
1060                        goto bail;
1061                }
1062                imap_info("ok\n");
1063        }
1064
1065        /* read the greeting string */
1066        if (buffer_gets(&imap->buf, &rsp)) {
1067                fprintf(stderr, "IMAP error: no greeting response\n");
1068                goto bail;
1069        }
1070        arg = next_arg(&rsp);
1071        if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1072                fprintf(stderr, "IMAP error: invalid greeting response\n");
1073                goto bail;
1074        }
1075        preauth = 0;
1076        if (!strcmp("PREAUTH", arg))
1077                preauth = 1;
1078        else if (strcmp("OK", arg) != 0) {
1079                fprintf(stderr, "IMAP error: unknown greeting response\n");
1080                goto bail;
1081        }
1082        parse_response_code(ctx, NULL, rsp);
1083        if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1084                goto bail;
1085
1086        if (!preauth) {
1087#ifndef NO_OPENSSL
1088                if (!srvc->use_ssl && CAP(STARTTLS)) {
1089                        if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK)
1090                                goto bail;
1091                        if (ssl_socket_connect(&imap->buf.sock, 1,
1092                                               srvc->ssl_verify))
1093                                goto bail;
1094                        /* capabilities may have changed, so get the new capabilities */
1095                        if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1096                                goto bail;
1097                }
1098#endif
1099                imap_info("Logging in...\n");
1100                if (!srvc->user || !srvc->pass) {
1101                        cred.protocol = xstrdup(srvc->use_ssl ? "imaps" : "imap");
1102                        cred.host = xstrdup(srvc->host);
1103
1104                        if (srvc->user)
1105                                cred.username = xstrdup(srvc->user);
1106                        if (srvc->pass)
1107                                cred.password = xstrdup(srvc->pass);
1108
1109                        credential_fill(&cred);
1110
1111                        if (!srvc->user)
1112                                srvc->user = xstrdup(cred.username);
1113                        if (!srvc->pass)
1114                                srvc->pass = xstrdup(cred.password);
1115                }
1116
1117                if (CAP(NOLOGIN)) {
1118                        fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1119                        goto bail;
1120                }
1121
1122                if (srvc->auth_method) {
1123                        struct imap_cmd_cb cb;
1124
1125                        if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1126                                if (!CAP(AUTH_CRAM_MD5)) {
1127                                        fprintf(stderr, "You specified"
1128                                                "CRAM-MD5 as authentication method, "
1129                                                "but %s doesn't support it.\n", srvc->host);
1130                                        goto bail;
1131                                }
1132                                /* CRAM-MD5 */
1133
1134                                memset(&cb, 0, sizeof(cb));
1135                                cb.cont = auth_cram_md5;
1136                                if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1137                                        fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1138                                        goto bail;
1139                                }
1140                        } else {
1141                                fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1142                                goto bail;
1143                        }
1144                } else {
1145                        if (!imap->buf.sock.ssl)
1146                                imap_warn("*** IMAP Warning *** Password is being "
1147                                          "sent in the clear\n");
1148                        if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1149                                fprintf(stderr, "IMAP error: LOGIN failed\n");
1150                                goto bail;
1151                        }
1152                }
1153        } /* !preauth */
1154
1155        if (cred.username)
1156                credential_approve(&cred);
1157        credential_clear(&cred);
1158
1159        ctx->prefix = "";
1160        return ctx;
1161
1162bail:
1163        if (cred.username)
1164                credential_reject(&cred);
1165        credential_clear(&cred);
1166
1167        imap_close_store(ctx);
1168        return NULL;
1169}
1170
1171/*
1172 * Insert CR characters as necessary in *msg to ensure that every LF
1173 * character in *msg is preceded by a CR.
1174 */
1175static void lf_to_crlf(struct strbuf *msg)
1176{
1177        char *new;
1178        size_t i, j;
1179        char lastc;
1180
1181        /* First pass: tally, in j, the size of the new string: */
1182        for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1183                if (msg->buf[i] == '\n' && lastc != '\r')
1184                        j++; /* a CR will need to be added here */
1185                lastc = msg->buf[i];
1186                j++;
1187        }
1188
1189        new = xmalloc(j + 1);
1190
1191        /*
1192         * Second pass: write the new string.  Note that this loop is
1193         * otherwise identical to the first pass.
1194         */
1195        for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1196                if (msg->buf[i] == '\n' && lastc != '\r')
1197                        new[j++] = '\r';
1198                lastc = new[j++] = msg->buf[i];
1199        }
1200        strbuf_attach(msg, new, j, j + 1);
1201}
1202
1203/*
1204 * Store msg to IMAP.  Also detach and free the data from msg->data,
1205 * leaving msg->data empty.
1206 */
1207static int imap_store_msg(struct imap_store *ctx, struct strbuf *msg)
1208{
1209        struct imap *imap = ctx->imap;
1210        struct imap_cmd_cb cb;
1211        const char *prefix, *box;
1212        int ret;
1213
1214        lf_to_crlf(msg);
1215        memset(&cb, 0, sizeof(cb));
1216
1217        cb.dlen = msg->len;
1218        cb.data = strbuf_detach(msg, NULL);
1219
1220        box = ctx->name;
1221        prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1222        cb.create = 0;
1223        ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" ", prefix, box);
1224        imap->caps = imap->rcaps;
1225        if (ret != DRV_OK)
1226                return ret;
1227
1228        return DRV_OK;
1229}
1230
1231static void wrap_in_html(struct strbuf *msg)
1232{
1233        struct strbuf buf = STRBUF_INIT;
1234        static char *content_type = "Content-Type: text/html;\n";
1235        static char *pre_open = "<pre>\n";
1236        static char *pre_close = "</pre>\n";
1237        const char *body = strstr(msg->buf, "\n\n");
1238
1239        if (!body)
1240                return; /* Headers but no body; no wrapping needed */
1241
1242        body += 2;
1243
1244        strbuf_add(&buf, msg->buf, body - msg->buf - 1);
1245        strbuf_addstr(&buf, content_type);
1246        strbuf_addch(&buf, '\n');
1247        strbuf_addstr(&buf, pre_open);
1248        strbuf_addstr_xml_quoted(&buf, body);
1249        strbuf_addstr(&buf, pre_close);
1250
1251        strbuf_release(msg);
1252        *msg = buf;
1253}
1254
1255#define CHUNKSIZE 0x1000
1256
1257static int read_message(FILE *f, struct strbuf *all_msgs)
1258{
1259        do {
1260                if (strbuf_fread(all_msgs, CHUNKSIZE, f) <= 0)
1261                        break;
1262        } while (!feof(f));
1263
1264        return ferror(f) ? -1 : 0;
1265}
1266
1267static int count_messages(struct strbuf *all_msgs)
1268{
1269        int count = 0;
1270        char *p = all_msgs->buf;
1271
1272        while (1) {
1273                if (starts_with(p, "From ")) {
1274                        p = strstr(p+5, "\nFrom: ");
1275                        if (!p) break;
1276                        p = strstr(p+7, "\nDate: ");
1277                        if (!p) break;
1278                        p = strstr(p+7, "\nSubject: ");
1279                        if (!p) break;
1280                        p += 10;
1281                        count++;
1282                }
1283                p = strstr(p+5, "\nFrom ");
1284                if (!p)
1285                        break;
1286                p++;
1287        }
1288        return count;
1289}
1290
1291/*
1292 * Copy the next message from all_msgs, starting at offset *ofs, to
1293 * msg.  Update *ofs to the start of the following message.  Return
1294 * true iff a message was successfully copied.
1295 */
1296static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs)
1297{
1298        char *p, *data;
1299        size_t len;
1300
1301        if (*ofs >= all_msgs->len)
1302                return 0;
1303
1304        data = &all_msgs->buf[*ofs];
1305        len = all_msgs->len - *ofs;
1306
1307        if (len < 5 || !starts_with(data, "From "))
1308                return 0;
1309
1310        p = strchr(data, '\n');
1311        if (p) {
1312                p++;
1313                len -= p - data;
1314                *ofs += p - data;
1315                data = p;
1316        }
1317
1318        p = strstr(data, "\nFrom ");
1319        if (p)
1320                len = &p[1] - data;
1321
1322        strbuf_add(msg, data, len);
1323        *ofs += len;
1324        return 1;
1325}
1326
1327static char *imap_folder;
1328
1329static int git_imap_config(const char *key, const char *val, void *cb)
1330{
1331        if (!skip_prefix(key, "imap.", &key))
1332                return 0;
1333
1334        /* check booleans first, and barf on others */
1335        if (!strcmp("sslverify", key))
1336                server.ssl_verify = git_config_bool(key, val);
1337        else if (!strcmp("preformattedhtml", key))
1338                server.use_html = git_config_bool(key, val);
1339        else if (!val)
1340                return config_error_nonbool(key);
1341
1342        if (!strcmp("folder", key)) {
1343                imap_folder = xstrdup(val);
1344        } else if (!strcmp("host", key)) {
1345                if (starts_with(val, "imap:"))
1346                        val += 5;
1347                else if (starts_with(val, "imaps:")) {
1348                        val += 6;
1349                        server.use_ssl = 1;
1350                }
1351                if (starts_with(val, "//"))
1352                        val += 2;
1353                server.host = xstrdup(val);
1354        } else if (!strcmp("user", key))
1355                server.user = xstrdup(val);
1356        else if (!strcmp("pass", key))
1357                server.pass = xstrdup(val);
1358        else if (!strcmp("port", key))
1359                server.port = git_config_int(key, val);
1360        else if (!strcmp("tunnel", key))
1361                server.tunnel = xstrdup(val);
1362        else if (!strcmp("authmethod", key))
1363                server.auth_method = xstrdup(val);
1364
1365        return 0;
1366}
1367
1368int main(int argc, char **argv)
1369{
1370        struct strbuf all_msgs = STRBUF_INIT;
1371        struct strbuf msg = STRBUF_INIT;
1372        struct imap_store *ctx = NULL;
1373        int ofs = 0;
1374        int r;
1375        int total, n = 0;
1376        int nongit_ok;
1377
1378        git_extract_argv0_path(argv[0]);
1379
1380        git_setup_gettext();
1381
1382        if (argc != 1)
1383                usage(imap_send_usage);
1384
1385        setup_git_directory_gently(&nongit_ok);
1386        git_config(git_imap_config, NULL);
1387
1388        if (!server.port)
1389                server.port = server.use_ssl ? 993 : 143;
1390
1391        if (!imap_folder) {
1392                fprintf(stderr, "no imap store specified\n");
1393                return 1;
1394        }
1395        if (!server.host) {
1396                if (!server.tunnel) {
1397                        fprintf(stderr, "no imap host specified\n");
1398                        return 1;
1399                }
1400                server.host = "tunnel";
1401        }
1402
1403        /* read the messages */
1404        if (read_message(stdin, &all_msgs)) {
1405                fprintf(stderr, "error reading input\n");
1406                return 1;
1407        }
1408
1409        if (all_msgs.len == 0) {
1410                fprintf(stderr, "nothing to send\n");
1411                return 1;
1412        }
1413
1414        total = count_messages(&all_msgs);
1415        if (!total) {
1416                fprintf(stderr, "no messages to send\n");
1417                return 1;
1418        }
1419
1420        /* write it to the imap server */
1421        ctx = imap_open_store(&server);
1422        if (!ctx) {
1423                fprintf(stderr, "failed to open store\n");
1424                return 1;
1425        }
1426
1427        fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1428        ctx->name = imap_folder;
1429        while (1) {
1430                unsigned percent = n * 100 / total;
1431
1432                fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1433                if (!split_msg(&all_msgs, &msg, &ofs))
1434                        break;
1435                if (server.use_html)
1436                        wrap_in_html(&msg);
1437                r = imap_store_msg(ctx, &msg);
1438                if (r != DRV_OK)
1439                        break;
1440                n++;
1441        }
1442        fprintf(stderr, "\n");
1443
1444        imap_close_store(ctx);
1445
1446        return 0;
1447}