Andrew's git / gitweb.git / imap-send.c
?
imap-send.con commit mergetools/p4merge: swap LOCAL and REMOTE (c699a7c)
   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
  30typedef void *SSL;
  31#else
  32#include <openssl/evp.h>
  33#include <openssl/hmac.h>
  34#include <openssl/x509v3.h>
  35#endif
  36
  37static const char imap_send_usage[] = "git imap-send < <mbox>";
  38
  39#undef DRV_OK
  40#define DRV_OK          0
  41#define DRV_MSG_BAD     -1
  42#define DRV_BOX_BAD     -2
  43#define DRV_STORE_BAD   -3
  44
  45static int Verbose, Quiet;
  46
  47__attribute__((format (printf, 1, 2)))
  48static void imap_info(const char *, ...);
  49__attribute__((format (printf, 1, 2)))
  50static void imap_warn(const char *, ...);
  51
  52static char *next_arg(char **);
  53
  54__attribute__((format (printf, 3, 4)))
  55static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
  56
  57static int nfvasprintf(char **strp, const char *fmt, va_list ap)
  58{
  59        int len;
  60        char tmp[8192];
  61
  62        len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
  63        if (len < 0)
  64                die("Fatal: Out of memory");
  65        if (len >= sizeof(tmp))
  66                die("imap command overflow!");
  67        *strp = xmemdupz(tmp, len);
  68        return len;
  69}
  70
  71struct imap_server_conf {
  72        char *name;
  73        char *tunnel;
  74        char *host;
  75        int port;
  76        char *user;
  77        char *pass;
  78        int use_ssl;
  79        int ssl_verify;
  80        int use_html;
  81        char *auth_method;
  82};
  83
  84static struct imap_server_conf server = {
  85        NULL,   /* name */
  86        NULL,   /* tunnel */
  87        NULL,   /* host */
  88        0,      /* port */
  89        NULL,   /* user */
  90        NULL,   /* pass */
  91        0,      /* use_ssl */
  92        1,      /* ssl_verify */
  93        0,      /* use_html */
  94        NULL,   /* auth_method */
  95};
  96
  97struct imap_socket {
  98        int fd[2];
  99        SSL *ssl;
 100};
 101
 102struct imap_buffer {
 103        struct imap_socket sock;
 104        int bytes;
 105        int offset;
 106        char buf[1024];
 107};
 108
 109struct imap_cmd;
 110
 111struct imap {
 112        int uidnext; /* from SELECT responses */
 113        unsigned caps, rcaps; /* CAPABILITY results */
 114        /* command queue */
 115        int nexttag, num_in_progress, literal_pending;
 116        struct imap_cmd *in_progress, **in_progress_append;
 117        struct imap_buffer buf; /* this is BIG, so put it last */
 118};
 119
 120struct imap_store {
 121        /* currently open mailbox */
 122        const char *name; /* foreign! maybe preset? */
 123        int uidvalidity;
 124        struct imap *imap;
 125        const char *prefix;
 126};
 127
 128struct imap_cmd_cb {
 129        int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
 130        void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
 131        void *ctx;
 132        char *data;
 133        int dlen;
 134        int uid;
 135        unsigned create:1, trycreate:1;
 136};
 137
 138struct imap_cmd {
 139        struct imap_cmd *next;
 140        struct imap_cmd_cb cb;
 141        char *cmd;
 142        int tag;
 143};
 144
 145#define CAP(cap) (imap->caps & (1 << (cap)))
 146
 147enum CAPABILITY {
 148        NOLOGIN = 0,
 149        UIDPLUS,
 150        LITERALPLUS,
 151        NAMESPACE,
 152        STARTTLS,
 153        AUTH_CRAM_MD5
 154};
 155
 156static const char *cap_list[] = {
 157        "LOGINDISABLED",
 158        "UIDPLUS",
 159        "LITERAL+",
 160        "NAMESPACE",
 161        "STARTTLS",
 162        "AUTH=CRAM-MD5",
 163};
 164
 165#define RESP_OK    0
 166#define RESP_NO    1
 167#define RESP_BAD   2
 168
 169static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
 170
 171
 172#ifndef NO_OPENSSL
 173static void ssl_socket_perror(const char *func)
 174{
 175        fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
 176}
 177#endif
 178
 179static void socket_perror(const char *func, struct imap_socket *sock, int ret)
 180{
 181#ifndef NO_OPENSSL
 182        if (sock->ssl) {
 183                int sslerr = SSL_get_error(sock->ssl, ret);
 184                switch (sslerr) {
 185                case SSL_ERROR_NONE:
 186                        break;
 187                case SSL_ERROR_SYSCALL:
 188                        perror("SSL_connect");
 189                        break;
 190                default:
 191                        ssl_socket_perror("SSL_connect");
 192                        break;
 193                }
 194        } else
 195#endif
 196        {
 197                if (ret < 0)
 198                        perror(func);
 199                else
 200                        fprintf(stderr, "%s: unexpected EOF\n", func);
 201        }
 202}
 203
 204#ifdef NO_OPENSSL
 205static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 206{
 207        fprintf(stderr, "SSL requested but SSL support not compiled in\n");
 208        return -1;
 209}
 210
 211#else
 212
 213static int host_matches(const char *host, const char *pattern)
 214{
 215        if (pattern[0] == '*' && pattern[1] == '.') {
 216                pattern += 2;
 217                if (!(host = strchr(host, '.')))
 218                        return 0;
 219                host++;
 220        }
 221
 222        return *host && *pattern && !strcasecmp(host, pattern);
 223}
 224
 225static int verify_hostname(X509 *cert, const char *hostname)
 226{
 227        int len;
 228        X509_NAME *subj;
 229        char cname[1000];
 230        int i, found;
 231        STACK_OF(GENERAL_NAME) *subj_alt_names;
 232
 233        /* try the DNS subjectAltNames */
 234        found = 0;
 235        if ((subj_alt_names = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL))) {
 236                int num_subj_alt_names = sk_GENERAL_NAME_num(subj_alt_names);
 237                for (i = 0; !found && i < num_subj_alt_names; i++) {
 238                        GENERAL_NAME *subj_alt_name = sk_GENERAL_NAME_value(subj_alt_names, i);
 239                        if (subj_alt_name->type == GEN_DNS &&
 240                            strlen((const char *)subj_alt_name->d.ia5->data) == (size_t)subj_alt_name->d.ia5->length &&
 241                            host_matches(hostname, (const char *)(subj_alt_name->d.ia5->data)))
 242                                found = 1;
 243                }
 244                sk_GENERAL_NAME_pop_free(subj_alt_names, GENERAL_NAME_free);
 245        }
 246        if (found)
 247                return 0;
 248
 249        /* try the common name */
 250        if (!(subj = X509_get_subject_name(cert)))
 251                return error("cannot get certificate subject");
 252        if ((len = X509_NAME_get_text_by_NID(subj, NID_commonName, cname, sizeof(cname))) < 0)
 253                return error("cannot get certificate common name");
 254        if (strlen(cname) == (size_t)len && host_matches(hostname, cname))
 255                return 0;
 256        return error("certificate owner '%s' does not match hostname '%s'",
 257                     cname, hostname);
 258}
 259
 260static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 261{
 262#if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
 263        const SSL_METHOD *meth;
 264#else
 265        SSL_METHOD *meth;
 266#endif
 267        SSL_CTX *ctx;
 268        int ret;
 269        X509 *cert;
 270
 271        SSL_library_init();
 272        SSL_load_error_strings();
 273
 274        if (use_tls_only)
 275                meth = TLSv1_method();
 276        else
 277                meth = SSLv23_method();
 278
 279        if (!meth) {
 280                ssl_socket_perror("SSLv23_method");
 281                return -1;
 282        }
 283
 284        ctx = SSL_CTX_new(meth);
 285
 286        if (verify)
 287                SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
 288
 289        if (!SSL_CTX_set_default_verify_paths(ctx)) {
 290                ssl_socket_perror("SSL_CTX_set_default_verify_paths");
 291                return -1;
 292        }
 293        sock->ssl = SSL_new(ctx);
 294        if (!sock->ssl) {
 295                ssl_socket_perror("SSL_new");
 296                return -1;
 297        }
 298        if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
 299                ssl_socket_perror("SSL_set_rfd");
 300                return -1;
 301        }
 302        if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
 303                ssl_socket_perror("SSL_set_wfd");
 304                return -1;
 305        }
 306
 307        ret = SSL_connect(sock->ssl);
 308        if (ret <= 0) {
 309                socket_perror("SSL_connect", sock, ret);
 310                return -1;
 311        }
 312
 313        if (verify) {
 314                /* make sure the hostname matches that of the certificate */
 315                cert = SSL_get_peer_certificate(sock->ssl);
 316                if (!cert)
 317                        return error("unable to get peer certificate.");
 318                if (verify_hostname(cert, server.host) < 0)
 319                        return -1;
 320        }
 321
 322        return 0;
 323}
 324#endif
 325
 326static int socket_read(struct imap_socket *sock, char *buf, int len)
 327{
 328        ssize_t n;
 329#ifndef NO_OPENSSL
 330        if (sock->ssl)
 331                n = SSL_read(sock->ssl, buf, len);
 332        else
 333#endif
 334                n = xread(sock->fd[0], buf, len);
 335        if (n <= 0) {
 336                socket_perror("read", sock, n);
 337                close(sock->fd[0]);
 338                close(sock->fd[1]);
 339                sock->fd[0] = sock->fd[1] = -1;
 340        }
 341        return n;
 342}
 343
 344static int socket_write(struct imap_socket *sock, const char *buf, int len)
 345{
 346        int n;
 347#ifndef NO_OPENSSL
 348        if (sock->ssl)
 349                n = SSL_write(sock->ssl, buf, len);
 350        else
 351#endif
 352                n = write_in_full(sock->fd[1], buf, len);
 353        if (n != len) {
 354                socket_perror("write", sock, n);
 355                close(sock->fd[0]);
 356                close(sock->fd[1]);
 357                sock->fd[0] = sock->fd[1] = -1;
 358        }
 359        return n;
 360}
 361
 362static void socket_shutdown(struct imap_socket *sock)
 363{
 364#ifndef NO_OPENSSL
 365        if (sock->ssl) {
 366                SSL_shutdown(sock->ssl);
 367                SSL_free(sock->ssl);
 368        }
 369#endif
 370        close(sock->fd[0]);
 371        close(sock->fd[1]);
 372}
 373
 374/* simple line buffering */
 375static int buffer_gets(struct imap_buffer *b, char **s)
 376{
 377        int n;
 378        int start = b->offset;
 379
 380        *s = b->buf + start;
 381
 382        for (;;) {
 383                /* make sure we have enough data to read the \r\n sequence */
 384                if (b->offset + 1 >= b->bytes) {
 385                        if (start) {
 386                                /* shift down used bytes */
 387                                *s = b->buf;
 388
 389                                assert(start <= b->bytes);
 390                                n = b->bytes - start;
 391
 392                                if (n)
 393                                        memmove(b->buf, b->buf + start, n);
 394                                b->offset -= start;
 395                                b->bytes = n;
 396                                start = 0;
 397                        }
 398
 399                        n = socket_read(&b->sock, b->buf + b->bytes,
 400                                         sizeof(b->buf) - b->bytes);
 401
 402                        if (n <= 0)
 403                                return -1;
 404
 405                        b->bytes += n;
 406                }
 407
 408                if (b->buf[b->offset] == '\r') {
 409                        assert(b->offset + 1 < b->bytes);
 410                        if (b->buf[b->offset + 1] == '\n') {
 411                                b->buf[b->offset] = 0;  /* terminate the string */
 412                                b->offset += 2; /* next line */
 413                                if (Verbose)
 414                                        puts(*s);
 415                                return 0;
 416                        }
 417                }
 418
 419                b->offset++;
 420        }
 421        /* not reached */
 422}
 423
 424static void imap_info(const char *msg, ...)
 425{
 426        va_list va;
 427
 428        if (!Quiet) {
 429                va_start(va, msg);
 430                vprintf(msg, va);
 431                va_end(va);
 432                fflush(stdout);
 433        }
 434}
 435
 436static void imap_warn(const char *msg, ...)
 437{
 438        va_list va;
 439
 440        if (Quiet < 2) {
 441                va_start(va, msg);
 442                vfprintf(stderr, msg, va);
 443                va_end(va);
 444        }
 445}
 446
 447static char *next_arg(char **s)
 448{
 449        char *ret;
 450
 451        if (!s || !*s)
 452                return NULL;
 453        while (isspace((unsigned char) **s))
 454                (*s)++;
 455        if (!**s) {
 456                *s = NULL;
 457                return NULL;
 458        }
 459        if (**s == '"') {
 460                ++*s;
 461                ret = *s;
 462                *s = strchr(*s, '"');
 463        } else {
 464                ret = *s;
 465                while (**s && !isspace((unsigned char) **s))
 466                        (*s)++;
 467        }
 468        if (*s) {
 469                if (**s)
 470                        *(*s)++ = 0;
 471                if (!**s)
 472                        *s = NULL;
 473        }
 474        return ret;
 475}
 476
 477static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
 478{
 479        int ret;
 480        va_list va;
 481
 482        va_start(va, fmt);
 483        if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
 484                die("Fatal: buffer too small. Please report a bug.");
 485        va_end(va);
 486        return ret;
 487}
 488
 489static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
 490                                         struct imap_cmd_cb *cb,
 491                                         const char *fmt, va_list ap)
 492{
 493        struct imap *imap = ctx->imap;
 494        struct imap_cmd *cmd;
 495        int n, bufl;
 496        char buf[1024];
 497
 498        cmd = xmalloc(sizeof(struct imap_cmd));
 499        nfvasprintf(&cmd->cmd, fmt, ap);
 500        cmd->tag = ++imap->nexttag;
 501
 502        if (cb)
 503                cmd->cb = *cb;
 504        else
 505                memset(&cmd->cb, 0, sizeof(cmd->cb));
 506
 507        while (imap->literal_pending)
 508                get_cmd_result(ctx, NULL);
 509
 510        if (!cmd->cb.data)
 511                bufl = nfsnprintf(buf, sizeof(buf), "%d %s\r\n", cmd->tag, cmd->cmd);
 512        else
 513                bufl = nfsnprintf(buf, sizeof(buf), "%d %s{%d%s}\r\n",
 514                                  cmd->tag, cmd->cmd, cmd->cb.dlen,
 515                                  CAP(LITERALPLUS) ? "+" : "");
 516
 517        if (Verbose) {
 518                if (imap->num_in_progress)
 519                        printf("(%d in progress) ", imap->num_in_progress);
 520                if (memcmp(cmd->cmd, "LOGIN", 5))
 521                        printf(">>> %s", buf);
 522                else
 523                        printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
 524        }
 525        if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
 526                free(cmd->cmd);
 527                free(cmd);
 528                if (cb)
 529                        free(cb->data);
 530                return NULL;
 531        }
 532        if (cmd->cb.data) {
 533                if (CAP(LITERALPLUS)) {
 534                        n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
 535                        free(cmd->cb.data);
 536                        if (n != cmd->cb.dlen ||
 537                            socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
 538                                free(cmd->cmd);
 539                                free(cmd);
 540                                return NULL;
 541                        }
 542                        cmd->cb.data = NULL;
 543                } else
 544                        imap->literal_pending = 1;
 545        } else if (cmd->cb.cont)
 546                imap->literal_pending = 1;
 547        cmd->next = NULL;
 548        *imap->in_progress_append = cmd;
 549        imap->in_progress_append = &cmd->next;
 550        imap->num_in_progress++;
 551        return cmd;
 552}
 553
 554__attribute__((format (printf, 3, 4)))
 555static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
 556                                       struct imap_cmd_cb *cb,
 557                                       const char *fmt, ...)
 558{
 559        struct imap_cmd *ret;
 560        va_list ap;
 561
 562        va_start(ap, fmt);
 563        ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
 564        va_end(ap);
 565        return ret;
 566}
 567
 568__attribute__((format (printf, 3, 4)))
 569static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
 570                     const char *fmt, ...)
 571{
 572        va_list ap;
 573        struct imap_cmd *cmdp;
 574
 575        va_start(ap, fmt);
 576        cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 577        va_end(ap);
 578        if (!cmdp)
 579                return RESP_BAD;
 580
 581        return get_cmd_result(ctx, cmdp);
 582}
 583
 584__attribute__((format (printf, 3, 4)))
 585static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
 586                       const char *fmt, ...)
 587{
 588        va_list ap;
 589        struct imap_cmd *cmdp;
 590
 591        va_start(ap, fmt);
 592        cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 593        va_end(ap);
 594        if (!cmdp)
 595                return DRV_STORE_BAD;
 596
 597        switch (get_cmd_result(ctx, cmdp)) {
 598        case RESP_BAD: return DRV_STORE_BAD;
 599        case RESP_NO: return DRV_MSG_BAD;
 600        default: return DRV_OK;
 601        }
 602}
 603
 604static int skip_imap_list_l(char **sp, int level)
 605{
 606        char *s = *sp;
 607
 608        for (;;) {
 609                while (isspace((unsigned char)*s))
 610                        s++;
 611                if (level && *s == ')') {
 612                        s++;
 613                        break;
 614                }
 615                if (*s == '(') {
 616                        /* sublist */
 617                        s++;
 618                        if (skip_imap_list_l(&s, level + 1))
 619                                goto bail;
 620                } else if (*s == '"') {
 621                        /* quoted string */
 622                        s++;
 623                        for (; *s != '"'; s++)
 624                                if (!*s)
 625                                        goto bail;
 626                        s++;
 627                } else {
 628                        /* atom */
 629                        for (; *s && !isspace((unsigned char)*s); s++)
 630                                if (level && *s == ')')
 631                                        break;
 632                }
 633
 634                if (!level)
 635                        break;
 636                if (!*s)
 637                        goto bail;
 638        }
 639        *sp = s;
 640        return 0;
 641
 642bail:
 643        return -1;
 644}
 645
 646static void skip_list(char **sp)
 647{
 648        skip_imap_list_l(sp, 0);
 649}
 650
 651static void parse_capability(struct imap *imap, char *cmd)
 652{
 653        char *arg;
 654        unsigned i;
 655
 656        imap->caps = 0x80000000;
 657        while ((arg = next_arg(&cmd)))
 658                for (i = 0; i < ARRAY_SIZE(cap_list); i++)
 659                        if (!strcmp(cap_list[i], arg))
 660                                imap->caps |= 1 << i;
 661        imap->rcaps = imap->caps;
 662}
 663
 664static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
 665                               char *s)
 666{
 667        struct imap *imap = ctx->imap;
 668        char *arg, *p;
 669
 670        if (*s != '[')
 671                return RESP_OK;         /* no response code */
 672        s++;
 673        if (!(p = strchr(s, ']'))) {
 674                fprintf(stderr, "IMAP error: malformed response code\n");
 675                return RESP_BAD;
 676        }
 677        *p++ = 0;
 678        arg = next_arg(&s);
 679        if (!strcmp("UIDVALIDITY", arg)) {
 680                if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg))) {
 681                        fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
 682                        return RESP_BAD;
 683                }
 684        } else if (!strcmp("UIDNEXT", arg)) {
 685                if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
 686                        fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
 687                        return RESP_BAD;
 688                }
 689        } else if (!strcmp("CAPABILITY", arg)) {
 690                parse_capability(imap, s);
 691        } else if (!strcmp("ALERT", arg)) {
 692                /* RFC2060 says that these messages MUST be displayed
 693                 * to the user
 694                 */
 695                for (; isspace((unsigned char)*p); p++);
 696                fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
 697        } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
 698                if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg)) ||
 699                    !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
 700                        fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
 701                        return RESP_BAD;
 702                }
 703        }
 704        return RESP_OK;
 705}
 706
 707static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
 708{
 709        struct imap *imap = ctx->imap;
 710        struct imap_cmd *cmdp, **pcmdp, *ncmdp;
 711        char *cmd, *arg, *arg1, *p;
 712        int n, resp, resp2, tag;
 713
 714        for (;;) {
 715                if (buffer_gets(&imap->buf, &cmd))
 716                        return RESP_BAD;
 717
 718                arg = next_arg(&cmd);
 719                if (*arg == '*') {
 720                        arg = next_arg(&cmd);
 721                        if (!arg) {
 722                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 723                                return RESP_BAD;
 724                        }
 725
 726                        if (!strcmp("NAMESPACE", arg)) {
 727                                /* rfc2342 NAMESPACE response. */
 728                                skip_list(&cmd); /* Personal mailboxes */
 729                                skip_list(&cmd); /* Others' mailboxes */
 730                                skip_list(&cmd); /* Shared mailboxes */
 731                        } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
 732                                   !strcmp("NO", arg) || !strcmp("BYE", arg)) {
 733                                if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
 734                                        return resp;
 735                        } else if (!strcmp("CAPABILITY", arg)) {
 736                                parse_capability(imap, cmd);
 737                        } else if ((arg1 = next_arg(&cmd))) {
 738                                ; /*
 739                                   * Unhandled response-data with at least two words.
 740                                   * Ignore it.
 741                                   *
 742                                   * NEEDSWORK: Previously this case handled '<num> EXISTS'
 743                                   * and '<num> RECENT' but as a probably-unintended side
 744                                   * effect it ignores other unrecognized two-word
 745                                   * responses.  imap-send doesn't ever try to read
 746                                   * messages or mailboxes these days, so consider
 747                                   * eliminating this case.
 748                                   */
 749                        } else {
 750                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 751                                return RESP_BAD;
 752                        }
 753                } else if (!imap->in_progress) {
 754                        fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
 755                        return RESP_BAD;
 756                } else if (*arg == '+') {
 757                        /* This can happen only with the last command underway, as
 758                           it enforces a round-trip. */
 759                        cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
 760                               offsetof(struct imap_cmd, next));
 761                        if (cmdp->cb.data) {
 762                                n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
 763                                free(cmdp->cb.data);
 764                                cmdp->cb.data = NULL;
 765                                if (n != (int)cmdp->cb.dlen)
 766                                        return RESP_BAD;
 767                        } else if (cmdp->cb.cont) {
 768                                if (cmdp->cb.cont(ctx, cmdp, cmd))
 769                                        return RESP_BAD;
 770                        } else {
 771                                fprintf(stderr, "IMAP error: unexpected command continuation request\n");
 772                                return RESP_BAD;
 773                        }
 774                        if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
 775                                return RESP_BAD;
 776                        if (!cmdp->cb.cont)
 777                                imap->literal_pending = 0;
 778                        if (!tcmd)
 779                                return DRV_OK;
 780                } else {
 781                        tag = atoi(arg);
 782                        for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
 783                                if (cmdp->tag == tag)
 784                                        goto gottag;
 785                        fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
 786                        return RESP_BAD;
 787                gottag:
 788                        if (!(*pcmdp = cmdp->next))
 789                                imap->in_progress_append = pcmdp;
 790                        imap->num_in_progress--;
 791                        if (cmdp->cb.cont || cmdp->cb.data)
 792                                imap->literal_pending = 0;
 793                        arg = next_arg(&cmd);
 794                        if (!strcmp("OK", arg))
 795                                resp = DRV_OK;
 796                        else {
 797                                if (!strcmp("NO", arg)) {
 798                                        if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
 799                                                p = strchr(cmdp->cmd, '"');
 800                                                if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", (int)(strchr(p + 1, '"') - p + 1), p)) {
 801                                                        resp = RESP_BAD;
 802                                                        goto normal;
 803                                                }
 804                                                /* not waiting here violates the spec, but a server that does not
 805                                                   grok this nonetheless violates it too. */
 806                                                cmdp->cb.create = 0;
 807                                                if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
 808                                                        resp = RESP_BAD;
 809                                                        goto normal;
 810                                                }
 811                                                free(cmdp->cmd);
 812                                                free(cmdp);
 813                                                if (!tcmd)
 814                                                        return 0;       /* ignored */
 815                                                if (cmdp == tcmd)
 816                                                        tcmd = ncmdp;
 817                                                continue;
 818                                        }
 819                                        resp = RESP_NO;
 820                                } else /*if (!strcmp("BAD", arg))*/
 821                                        resp = RESP_BAD;
 822                                fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
 823                                         memcmp(cmdp->cmd, "LOGIN", 5) ?
 824                                                        cmdp->cmd : "LOGIN <user> <pass>",
 825                                                        arg, cmd ? cmd : "");
 826                        }
 827                        if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
 828                                resp = resp2;
 829                normal:
 830                        if (cmdp->cb.done)
 831                                cmdp->cb.done(ctx, cmdp, resp);
 832                        free(cmdp->cb.data);
 833                        free(cmdp->cmd);
 834                        free(cmdp);
 835                        if (!tcmd || tcmd == cmdp)
 836                                return resp;
 837                }
 838        }
 839        /* not reached */
 840}
 841
 842static void imap_close_server(struct imap_store *ictx)
 843{
 844        struct imap *imap = ictx->imap;
 845
 846        if (imap->buf.sock.fd[0] != -1) {
 847                imap_exec(ictx, NULL, "LOGOUT");
 848                socket_shutdown(&imap->buf.sock);
 849        }
 850        free(imap);
 851}
 852
 853static void imap_close_store(struct imap_store *ctx)
 854{
 855        imap_close_server(ctx);
 856        free(ctx);
 857}
 858
 859#ifndef NO_OPENSSL
 860
 861/*
 862 * hexchar() and cram() functions are based on the code from the isync
 863 * project (http://isync.sf.net/).
 864 */
 865static char hexchar(unsigned int b)
 866{
 867        return b < 10 ? '0' + b : 'a' + (b - 10);
 868}
 869
 870#define ENCODED_SIZE(n) (4*((n+2)/3))
 871static char *cram(const char *challenge_64, const char *user, const char *pass)
 872{
 873        int i, resp_len, encoded_len, decoded_len;
 874        HMAC_CTX hmac;
 875        unsigned char hash[16];
 876        char hex[33];
 877        char *response, *response_64, *challenge;
 878
 879        /*
 880         * length of challenge_64 (i.e. base-64 encoded string) is a good
 881         * enough upper bound for challenge (decoded result).
 882         */
 883        encoded_len = strlen(challenge_64);
 884        challenge = xmalloc(encoded_len);
 885        decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
 886                                      (unsigned char *)challenge_64, encoded_len);
 887        if (decoded_len < 0)
 888                die("invalid challenge %s", challenge_64);
 889        HMAC_Init(&hmac, (unsigned char *)pass, strlen(pass), EVP_md5());
 890        HMAC_Update(&hmac, (unsigned char *)challenge, decoded_len);
 891        HMAC_Final(&hmac, hash, NULL);
 892        HMAC_CTX_cleanup(&hmac);
 893
 894        hex[32] = 0;
 895        for (i = 0; i < 16; i++) {
 896                hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
 897                hex[2 * i + 1] = hexchar(hash[i] & 0xf);
 898        }
 899
 900        /* response: "<user> <digest in hex>" */
 901        resp_len = strlen(user) + 1 + strlen(hex) + 1;
 902        response = xmalloc(resp_len);
 903        sprintf(response, "%s %s", user, hex);
 904
 905        response_64 = xmalloc(ENCODED_SIZE(resp_len) + 1);
 906        encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
 907                                      (unsigned char *)response, resp_len);
 908        if (encoded_len < 0)
 909                die("EVP_EncodeBlock error");
 910        response_64[encoded_len] = '\0';
 911        return (char *)response_64;
 912}
 913
 914#else
 915
 916static char *cram(const char *challenge_64, const char *user, const char *pass)
 917{
 918        die("If you want to use CRAM-MD5 authenticate method, "
 919            "you have to build git-imap-send with OpenSSL library.");
 920}
 921
 922#endif
 923
 924static int auth_cram_md5(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt)
 925{
 926        int ret;
 927        char *response;
 928
 929        response = cram(prompt, server.user, server.pass);
 930
 931        ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
 932        if (ret != strlen(response))
 933                return error("IMAP error: sending response failed");
 934
 935        free(response);
 936
 937        return 0;
 938}
 939
 940static struct imap_store *imap_open_store(struct imap_server_conf *srvc)
 941{
 942        struct imap_store *ctx;
 943        struct imap *imap;
 944        char *arg, *rsp;
 945        int s = -1, preauth;
 946
 947        ctx = xcalloc(sizeof(*ctx), 1);
 948
 949        ctx->imap = imap = xcalloc(sizeof(*imap), 1);
 950        imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
 951        imap->in_progress_append = &imap->in_progress;
 952
 953        /* open connection to IMAP server */
 954
 955        if (srvc->tunnel) {
 956                const char *argv[] = { srvc->tunnel, NULL };
 957                struct child_process tunnel = {NULL};
 958
 959                imap_info("Starting tunnel '%s'... ", srvc->tunnel);
 960
 961                tunnel.argv = argv;
 962                tunnel.use_shell = 1;
 963                tunnel.in = -1;
 964                tunnel.out = -1;
 965                if (start_command(&tunnel))
 966                        die("cannot start proxy %s", argv[0]);
 967
 968                imap->buf.sock.fd[0] = tunnel.out;
 969                imap->buf.sock.fd[1] = tunnel.in;
 970
 971                imap_info("ok\n");
 972        } else {
 973#ifndef NO_IPV6
 974                struct addrinfo hints, *ai0, *ai;
 975                int gai;
 976                char portstr[6];
 977
 978                snprintf(portstr, sizeof(portstr), "%d", srvc->port);
 979
 980                memset(&hints, 0, sizeof(hints));
 981                hints.ai_socktype = SOCK_STREAM;
 982                hints.ai_protocol = IPPROTO_TCP;
 983
 984                imap_info("Resolving %s... ", srvc->host);
 985                gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
 986                if (gai) {
 987                        fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
 988                        goto bail;
 989                }
 990                imap_info("ok\n");
 991
 992                for (ai0 = ai; ai; ai = ai->ai_next) {
 993                        char addr[NI_MAXHOST];
 994
 995                        s = socket(ai->ai_family, ai->ai_socktype,
 996                                   ai->ai_protocol);
 997                        if (s < 0)
 998                                continue;
 999
1000                        getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1001                                    sizeof(addr), NULL, 0, NI_NUMERICHOST);
1002                        imap_info("Connecting to [%s]:%s... ", addr, portstr);
1003
1004                        if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1005                                close(s);
1006                                s = -1;
1007                                perror("connect");
1008                                continue;
1009                        }
1010
1011                        break;
1012                }
1013                freeaddrinfo(ai0);
1014#else /* NO_IPV6 */
1015                struct hostent *he;
1016                struct sockaddr_in addr;
1017
1018                memset(&addr, 0, sizeof(addr));
1019                addr.sin_port = htons(srvc->port);
1020                addr.sin_family = AF_INET;
1021
1022                imap_info("Resolving %s... ", srvc->host);
1023                he = gethostbyname(srvc->host);
1024                if (!he) {
1025                        perror("gethostbyname");
1026                        goto bail;
1027                }
1028                imap_info("ok\n");
1029
1030                addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1031
1032                s = socket(PF_INET, SOCK_STREAM, 0);
1033
1034                imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1035                if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1036                        close(s);
1037                        s = -1;
1038                        perror("connect");
1039                }
1040#endif
1041                if (s < 0) {
1042                        fputs("Error: unable to connect to server.\n", stderr);
1043                        goto bail;
1044                }
1045
1046                imap->buf.sock.fd[0] = s;
1047                imap->buf.sock.fd[1] = dup(s);
1048
1049                if (srvc->use_ssl &&
1050                    ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1051                        close(s);
1052                        goto bail;
1053                }
1054                imap_info("ok\n");
1055        }
1056
1057        /* read the greeting string */
1058        if (buffer_gets(&imap->buf, &rsp)) {
1059                fprintf(stderr, "IMAP error: no greeting response\n");
1060                goto bail;
1061        }
1062        arg = next_arg(&rsp);
1063        if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1064                fprintf(stderr, "IMAP error: invalid greeting response\n");
1065                goto bail;
1066        }
1067        preauth = 0;
1068        if (!strcmp("PREAUTH", arg))
1069                preauth = 1;
1070        else if (strcmp("OK", arg) != 0) {
1071                fprintf(stderr, "IMAP error: unknown greeting response\n");
1072                goto bail;
1073        }
1074        parse_response_code(ctx, NULL, rsp);
1075        if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1076                goto bail;
1077
1078        if (!preauth) {
1079#ifndef NO_OPENSSL
1080                if (!srvc->use_ssl && CAP(STARTTLS)) {
1081                        if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK)
1082                                goto bail;
1083                        if (ssl_socket_connect(&imap->buf.sock, 1,
1084                                               srvc->ssl_verify))
1085                                goto bail;
1086                        /* capabilities may have changed, so get the new capabilities */
1087                        if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1088                                goto bail;
1089                }
1090#endif
1091                imap_info("Logging in...\n");
1092                if (!srvc->user) {
1093                        fprintf(stderr, "Skipping server %s, no user\n", srvc->host);
1094                        goto bail;
1095                }
1096                if (!srvc->pass) {
1097                        struct strbuf prompt = STRBUF_INIT;
1098                        strbuf_addf(&prompt, "Password (%s@%s): ", srvc->user, srvc->host);
1099                        arg = git_getpass(prompt.buf);
1100                        strbuf_release(&prompt);
1101                        if (!*arg) {
1102                                fprintf(stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host);
1103                                goto bail;
1104                        }
1105                        /*
1106                         * getpass() returns a pointer to a static buffer.  make a copy
1107                         * for long term storage.
1108                         */
1109                        srvc->pass = xstrdup(arg);
1110                }
1111                if (CAP(NOLOGIN)) {
1112                        fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1113                        goto bail;
1114                }
1115
1116                if (srvc->auth_method) {
1117                        struct imap_cmd_cb cb;
1118
1119                        if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1120                                if (!CAP(AUTH_CRAM_MD5)) {
1121                                        fprintf(stderr, "You specified"
1122                                                "CRAM-MD5 as authentication method, "
1123                                                "but %s doesn't support it.\n", srvc->host);
1124                                        goto bail;
1125                                }
1126                                /* CRAM-MD5 */
1127
1128                                memset(&cb, 0, sizeof(cb));
1129                                cb.cont = auth_cram_md5;
1130                                if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1131                                        fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1132                                        goto bail;
1133                                }
1134                        } else {
1135                                fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1136                                goto bail;
1137                        }
1138                } else {
1139                        if (!imap->buf.sock.ssl)
1140                                imap_warn("*** IMAP Warning *** Password is being "
1141                                          "sent in the clear\n");
1142                        if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1143                                fprintf(stderr, "IMAP error: LOGIN failed\n");
1144                                goto bail;
1145                        }
1146                }
1147        } /* !preauth */
1148
1149        ctx->prefix = "";
1150        return ctx;
1151
1152bail:
1153        imap_close_store(ctx);
1154        return NULL;
1155}
1156
1157/*
1158 * Insert CR characters as necessary in *msg to ensure that every LF
1159 * character in *msg is preceded by a CR.
1160 */
1161static void lf_to_crlf(struct strbuf *msg)
1162{
1163        char *new;
1164        size_t i, j;
1165        char lastc;
1166
1167        /* First pass: tally, in j, the size of the new string: */
1168        for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1169                if (msg->buf[i] == '\n' && lastc != '\r')
1170                        j++; /* a CR will need to be added here */
1171                lastc = msg->buf[i];
1172                j++;
1173        }
1174
1175        new = xmalloc(j + 1);
1176
1177        /*
1178         * Second pass: write the new string.  Note that this loop is
1179         * otherwise identical to the first pass.
1180         */
1181        for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1182                if (msg->buf[i] == '\n' && lastc != '\r')
1183                        new[j++] = '\r';
1184                lastc = new[j++] = msg->buf[i];
1185        }
1186        strbuf_attach(msg, new, j, j + 1);
1187}
1188
1189/*
1190 * Store msg to IMAP.  Also detach and free the data from msg->data,
1191 * leaving msg->data empty.
1192 */
1193static int imap_store_msg(struct imap_store *ctx, struct strbuf *msg)
1194{
1195        struct imap *imap = ctx->imap;
1196        struct imap_cmd_cb cb;
1197        const char *prefix, *box;
1198        int ret;
1199
1200        lf_to_crlf(msg);
1201        memset(&cb, 0, sizeof(cb));
1202
1203        cb.dlen = msg->len;
1204        cb.data = strbuf_detach(msg, NULL);
1205
1206        box = ctx->name;
1207        prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1208        cb.create = 0;
1209        ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" ", prefix, box);
1210        imap->caps = imap->rcaps;
1211        if (ret != DRV_OK)
1212                return ret;
1213
1214        return DRV_OK;
1215}
1216
1217static void wrap_in_html(struct strbuf *msg)
1218{
1219        struct strbuf buf = STRBUF_INIT;
1220        static char *content_type = "Content-Type: text/html;\n";
1221        static char *pre_open = "<pre>\n";
1222        static char *pre_close = "</pre>\n";
1223        const char *body = strstr(msg->buf, "\n\n");
1224
1225        if (!body)
1226                return; /* Headers but no body; no wrapping needed */
1227
1228        body += 2;
1229
1230        strbuf_add(&buf, msg->buf, body - msg->buf - 1);
1231        strbuf_addstr(&buf, content_type);
1232        strbuf_addch(&buf, '\n');
1233        strbuf_addstr(&buf, pre_open);
1234        strbuf_addstr_xml_quoted(&buf, body);
1235        strbuf_addstr(&buf, pre_close);
1236
1237        strbuf_release(msg);
1238        *msg = buf;
1239}
1240
1241#define CHUNKSIZE 0x1000
1242
1243static int read_message(FILE *f, struct strbuf *all_msgs)
1244{
1245        do {
1246                if (strbuf_fread(all_msgs, CHUNKSIZE, f) <= 0)
1247                        break;
1248        } while (!feof(f));
1249
1250        return ferror(f) ? -1 : 0;
1251}
1252
1253static int count_messages(struct strbuf *all_msgs)
1254{
1255        int count = 0;
1256        char *p = all_msgs->buf;
1257
1258        while (1) {
1259                if (!prefixcmp(p, "From ")) {
1260                        p = strstr(p+5, "\nFrom: ");
1261                        if (!p) break;
1262                        p = strstr(p+7, "\nDate: ");
1263                        if (!p) break;
1264                        p = strstr(p+7, "\nSubject: ");
1265                        if (!p) break;
1266                        p += 10;
1267                        count++;
1268                }
1269                p = strstr(p+5, "\nFrom ");
1270                if (!p)
1271                        break;
1272                p++;
1273        }
1274        return count;
1275}
1276
1277/*
1278 * Copy the next message from all_msgs, starting at offset *ofs, to
1279 * msg.  Update *ofs to the start of the following message.  Return
1280 * true iff a message was successfully copied.
1281 */
1282static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs)
1283{
1284        char *p, *data;
1285        size_t len;
1286
1287        if (*ofs >= all_msgs->len)
1288                return 0;
1289
1290        data = &all_msgs->buf[*ofs];
1291        len = all_msgs->len - *ofs;
1292
1293        if (len < 5 || prefixcmp(data, "From "))
1294                return 0;
1295
1296        p = strchr(data, '\n');
1297        if (p) {
1298                p++;
1299                len -= p - data;
1300                *ofs += p - data;
1301                data = p;
1302        }
1303
1304        p = strstr(data, "\nFrom ");
1305        if (p)
1306                len = &p[1] - data;
1307
1308        strbuf_add(msg, data, len);
1309        *ofs += len;
1310        return 1;
1311}
1312
1313static char *imap_folder;
1314
1315static int git_imap_config(const char *key, const char *val, void *cb)
1316{
1317        char imap_key[] = "imap.";
1318
1319        if (strncmp(key, imap_key, sizeof imap_key - 1))
1320                return 0;
1321
1322        key += sizeof imap_key - 1;
1323
1324        /* check booleans first, and barf on others */
1325        if (!strcmp("sslverify", key))
1326                server.ssl_verify = git_config_bool(key, val);
1327        else if (!strcmp("preformattedhtml", key))
1328                server.use_html = git_config_bool(key, val);
1329        else if (!val)
1330                return config_error_nonbool(key);
1331
1332        if (!strcmp("folder", key)) {
1333                imap_folder = xstrdup(val);
1334        } else if (!strcmp("host", key)) {
1335                if (!prefixcmp(val, "imap:"))
1336                        val += 5;
1337                else if (!prefixcmp(val, "imaps:")) {
1338                        val += 6;
1339                        server.use_ssl = 1;
1340                }
1341                if (!prefixcmp(val, "//"))
1342                        val += 2;
1343                server.host = xstrdup(val);
1344        } else if (!strcmp("user", key))
1345                server.user = xstrdup(val);
1346        else if (!strcmp("pass", key))
1347                server.pass = xstrdup(val);
1348        else if (!strcmp("port", key))
1349                server.port = git_config_int(key, val);
1350        else if (!strcmp("tunnel", key))
1351                server.tunnel = xstrdup(val);
1352        else if (!strcmp("authmethod", key))
1353                server.auth_method = xstrdup(val);
1354
1355        return 0;
1356}
1357
1358int main(int argc, char **argv)
1359{
1360        struct strbuf all_msgs = STRBUF_INIT;
1361        struct strbuf msg = STRBUF_INIT;
1362        struct imap_store *ctx = NULL;
1363        int ofs = 0;
1364        int r;
1365        int total, n = 0;
1366        int nongit_ok;
1367
1368        git_extract_argv0_path(argv[0]);
1369
1370        git_setup_gettext();
1371
1372        if (argc != 1)
1373                usage(imap_send_usage);
1374
1375        setup_git_directory_gently(&nongit_ok);
1376        git_config(git_imap_config, NULL);
1377
1378        if (!server.port)
1379                server.port = server.use_ssl ? 993 : 143;
1380
1381        if (!imap_folder) {
1382                fprintf(stderr, "no imap store specified\n");
1383                return 1;
1384        }
1385        if (!server.host) {
1386                if (!server.tunnel) {
1387                        fprintf(stderr, "no imap host specified\n");
1388                        return 1;
1389                }
1390                server.host = "tunnel";
1391        }
1392
1393        /* read the messages */
1394        if (read_message(stdin, &all_msgs)) {
1395                fprintf(stderr, "error reading input\n");
1396                return 1;
1397        }
1398
1399        if (all_msgs.len == 0) {
1400                fprintf(stderr, "nothing to send\n");
1401                return 1;
1402        }
1403
1404        total = count_messages(&all_msgs);
1405        if (!total) {
1406                fprintf(stderr, "no messages to send\n");
1407                return 1;
1408        }
1409
1410        /* write it to the imap server */
1411        ctx = imap_open_store(&server);
1412        if (!ctx) {
1413                fprintf(stderr, "failed to open store\n");
1414                return 1;
1415        }
1416
1417        fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1418        ctx->name = imap_folder;
1419        while (1) {
1420                unsigned percent = n * 100 / total;
1421
1422                fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1423                if (!split_msg(&all_msgs, &msg, &ofs))
1424                        break;
1425                if (server.use_html)
1426                        wrap_in_html(&msg);
1427                r = imap_store_msg(ctx, &msg);
1428                if (r != DRV_OK)
1429                        break;
1430                n++;
1431        }
1432        fprintf(stderr, "\n");
1433
1434        imap_close_store(ctx);
1435
1436        return 0;
1437}