c818b0c7ea226599d43f2611d77a88acf308df1d
   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#endif
  35
  36struct store_conf {
  37        char *name;
  38        const char *path; /* should this be here? its interpretation is driver-specific */
  39        char *map_inbox;
  40        char *trash;
  41        unsigned max_size; /* off_t is overkill */
  42        unsigned trash_remote_new:1, trash_only_new:1;
  43};
  44
  45/* For message->status */
  46#define M_RECENT       (1<<0) /* unsyncable flag; maildir_* depend on this being 1<<0 */
  47#define M_DEAD         (1<<1) /* expunged */
  48#define M_FLAGS        (1<<2) /* flags fetched */
  49
  50struct message {
  51        struct message *next;
  52        size_t size; /* zero implies "not fetched" */
  53        int uid;
  54        unsigned char flags, status;
  55};
  56
  57struct store {
  58        struct store_conf *conf; /* foreign */
  59
  60        /* currently open mailbox */
  61        const char *name; /* foreign! maybe preset? */
  62        char *path; /* own */
  63        struct message *msgs; /* own */
  64        int uidvalidity;
  65        unsigned char opts; /* maybe preset? */
  66        /* note that the following do _not_ reflect stats from msgs, but mailbox totals */
  67        int count; /* # of messages */
  68        int recent; /* # of recent messages - don't trust this beyond the initial read */
  69};
  70
  71struct msg_data {
  72        /* NUL-terminated data: */
  73        char *data;
  74
  75        /* length of data (not including NUL): */
  76        int len;
  77
  78        unsigned char flags;
  79};
  80
  81static const char imap_send_usage[] = "git imap-send < <mbox>";
  82
  83#undef DRV_OK
  84#define DRV_OK          0
  85#define DRV_MSG_BAD     -1
  86#define DRV_BOX_BAD     -2
  87#define DRV_STORE_BAD   -3
  88
  89static int Verbose, Quiet;
  90
  91__attribute__((format (printf, 1, 2)))
  92static void imap_info(const char *, ...);
  93__attribute__((format (printf, 1, 2)))
  94static void imap_warn(const char *, ...);
  95
  96static char *next_arg(char **);
  97
  98static void free_generic_messages(struct message *);
  99
 100__attribute__((format (printf, 3, 4)))
 101static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
 102
 103static int nfvasprintf(char **strp, const char *fmt, va_list ap)
 104{
 105        int len;
 106        char tmp[8192];
 107
 108        len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
 109        if (len < 0)
 110                die("Fatal: Out of memory");
 111        if (len >= sizeof(tmp))
 112                die("imap command overflow!");
 113        *strp = xmemdupz(tmp, len);
 114        return len;
 115}
 116
 117struct imap_server_conf {
 118        char *name;
 119        char *tunnel;
 120        char *host;
 121        int port;
 122        char *user;
 123        char *pass;
 124        int use_ssl;
 125        int ssl_verify;
 126        int use_html;
 127        char *auth_method;
 128};
 129
 130static struct imap_server_conf server = {
 131        NULL,   /* name */
 132        NULL,   /* tunnel */
 133        NULL,   /* host */
 134        0,      /* port */
 135        NULL,   /* user */
 136        NULL,   /* pass */
 137        0,      /* use_ssl */
 138        1,      /* ssl_verify */
 139        0,      /* use_html */
 140        NULL,   /* auth_method */
 141};
 142
 143struct imap_store_conf {
 144        struct store_conf gen;
 145        struct imap_server_conf *server;
 146};
 147
 148#define NIL     (void *)0x1
 149#define LIST    (void *)0x2
 150
 151struct imap_list {
 152        struct imap_list *next, *child;
 153        char *val;
 154        int len;
 155};
 156
 157struct imap_socket {
 158        int fd[2];
 159        SSL *ssl;
 160};
 161
 162struct imap_buffer {
 163        struct imap_socket sock;
 164        int bytes;
 165        int offset;
 166        char buf[1024];
 167};
 168
 169struct imap_cmd;
 170
 171struct imap {
 172        int uidnext; /* from SELECT responses */
 173        struct imap_list *ns_personal, *ns_other, *ns_shared; /* NAMESPACE info */
 174        unsigned caps, rcaps; /* CAPABILITY results */
 175        /* command queue */
 176        int nexttag, num_in_progress, literal_pending;
 177        struct imap_cmd *in_progress, **in_progress_append;
 178        struct imap_buffer buf; /* this is BIG, so put it last */
 179};
 180
 181struct imap_store {
 182        struct store gen;
 183        int uidvalidity;
 184        struct imap *imap;
 185        const char *prefix;
 186        unsigned /*currentnc:1,*/ trashnc:1;
 187};
 188
 189struct imap_cmd_cb {
 190        int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
 191        void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
 192        void *ctx;
 193        char *data;
 194        int dlen;
 195        int uid;
 196        unsigned create:1, trycreate:1;
 197};
 198
 199struct imap_cmd {
 200        struct imap_cmd *next;
 201        struct imap_cmd_cb cb;
 202        char *cmd;
 203        int tag;
 204};
 205
 206#define CAP(cap) (imap->caps & (1 << (cap)))
 207
 208enum CAPABILITY {
 209        NOLOGIN = 0,
 210        UIDPLUS,
 211        LITERALPLUS,
 212        NAMESPACE,
 213        STARTTLS,
 214        AUTH_CRAM_MD5
 215};
 216
 217static const char *cap_list[] = {
 218        "LOGINDISABLED",
 219        "UIDPLUS",
 220        "LITERAL+",
 221        "NAMESPACE",
 222        "STARTTLS",
 223        "AUTH=CRAM-MD5",
 224};
 225
 226#define RESP_OK    0
 227#define RESP_NO    1
 228#define RESP_BAD   2
 229
 230static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
 231
 232
 233static const char *Flags[] = {
 234        "Draft",
 235        "Flagged",
 236        "Answered",
 237        "Seen",
 238        "Deleted",
 239};
 240
 241#ifndef NO_OPENSSL
 242static void ssl_socket_perror(const char *func)
 243{
 244        fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
 245}
 246#endif
 247
 248static void socket_perror(const char *func, struct imap_socket *sock, int ret)
 249{
 250#ifndef NO_OPENSSL
 251        if (sock->ssl) {
 252                int sslerr = SSL_get_error(sock->ssl, ret);
 253                switch (sslerr) {
 254                case SSL_ERROR_NONE:
 255                        break;
 256                case SSL_ERROR_SYSCALL:
 257                        perror("SSL_connect");
 258                        break;
 259                default:
 260                        ssl_socket_perror("SSL_connect");
 261                        break;
 262                }
 263        } else
 264#endif
 265        {
 266                if (ret < 0)
 267                        perror(func);
 268                else
 269                        fprintf(stderr, "%s: unexpected EOF\n", func);
 270        }
 271}
 272
 273static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 274{
 275#ifdef NO_OPENSSL
 276        fprintf(stderr, "SSL requested but SSL support not compiled in\n");
 277        return -1;
 278#else
 279#if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
 280        const SSL_METHOD *meth;
 281#else
 282        SSL_METHOD *meth;
 283#endif
 284        SSL_CTX *ctx;
 285        int ret;
 286
 287        SSL_library_init();
 288        SSL_load_error_strings();
 289
 290        if (use_tls_only)
 291                meth = TLSv1_method();
 292        else
 293                meth = SSLv23_method();
 294
 295        if (!meth) {
 296                ssl_socket_perror("SSLv23_method");
 297                return -1;
 298        }
 299
 300        ctx = SSL_CTX_new(meth);
 301
 302        if (verify)
 303                SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
 304
 305        if (!SSL_CTX_set_default_verify_paths(ctx)) {
 306                ssl_socket_perror("SSL_CTX_set_default_verify_paths");
 307                return -1;
 308        }
 309        sock->ssl = SSL_new(ctx);
 310        if (!sock->ssl) {
 311                ssl_socket_perror("SSL_new");
 312                return -1;
 313        }
 314        if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
 315                ssl_socket_perror("SSL_set_rfd");
 316                return -1;
 317        }
 318        if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
 319                ssl_socket_perror("SSL_set_wfd");
 320                return -1;
 321        }
 322
 323        ret = SSL_connect(sock->ssl);
 324        if (ret <= 0) {
 325                socket_perror("SSL_connect", sock, ret);
 326                return -1;
 327        }
 328
 329        return 0;
 330#endif
 331}
 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 void free_generic_messages(struct message *msgs)
 485{
 486        struct message *tmsg;
 487
 488        for (; msgs; msgs = tmsg) {
 489                tmsg = msgs->next;
 490                free(msgs);
 491        }
 492}
 493
 494static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
 495{
 496        int ret;
 497        va_list va;
 498
 499        va_start(va, fmt);
 500        if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
 501                die("Fatal: buffer too small. Please report a bug.");
 502        va_end(va);
 503        return ret;
 504}
 505
 506static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
 507                                         struct imap_cmd_cb *cb,
 508                                         const char *fmt, va_list ap)
 509{
 510        struct imap *imap = ctx->imap;
 511        struct imap_cmd *cmd;
 512        int n, bufl;
 513        char buf[1024];
 514
 515        cmd = xmalloc(sizeof(struct imap_cmd));
 516        nfvasprintf(&cmd->cmd, fmt, ap);
 517        cmd->tag = ++imap->nexttag;
 518
 519        if (cb)
 520                cmd->cb = *cb;
 521        else
 522                memset(&cmd->cb, 0, sizeof(cmd->cb));
 523
 524        while (imap->literal_pending)
 525                get_cmd_result(ctx, NULL);
 526
 527        if (!cmd->cb.data)
 528                bufl = nfsnprintf(buf, sizeof(buf), "%d %s\r\n", cmd->tag, cmd->cmd);
 529        else
 530                bufl = nfsnprintf(buf, sizeof(buf), "%d %s{%d%s}\r\n",
 531                                  cmd->tag, cmd->cmd, cmd->cb.dlen,
 532                                  CAP(LITERALPLUS) ? "+" : "");
 533
 534        if (Verbose) {
 535                if (imap->num_in_progress)
 536                        printf("(%d in progress) ", imap->num_in_progress);
 537                if (memcmp(cmd->cmd, "LOGIN", 5))
 538                        printf(">>> %s", buf);
 539                else
 540                        printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
 541        }
 542        if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
 543                free(cmd->cmd);
 544                free(cmd);
 545                if (cb)
 546                        free(cb->data);
 547                return NULL;
 548        }
 549        if (cmd->cb.data) {
 550                if (CAP(LITERALPLUS)) {
 551                        n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
 552                        free(cmd->cb.data);
 553                        if (n != cmd->cb.dlen ||
 554                            socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
 555                                free(cmd->cmd);
 556                                free(cmd);
 557                                return NULL;
 558                        }
 559                        cmd->cb.data = NULL;
 560                } else
 561                        imap->literal_pending = 1;
 562        } else if (cmd->cb.cont)
 563                imap->literal_pending = 1;
 564        cmd->next = NULL;
 565        *imap->in_progress_append = cmd;
 566        imap->in_progress_append = &cmd->next;
 567        imap->num_in_progress++;
 568        return cmd;
 569}
 570
 571__attribute__((format (printf, 3, 4)))
 572static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
 573                                       struct imap_cmd_cb *cb,
 574                                       const char *fmt, ...)
 575{
 576        struct imap_cmd *ret;
 577        va_list ap;
 578
 579        va_start(ap, fmt);
 580        ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
 581        va_end(ap);
 582        return ret;
 583}
 584
 585__attribute__((format (printf, 3, 4)))
 586static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
 587                     const char *fmt, ...)
 588{
 589        va_list ap;
 590        struct imap_cmd *cmdp;
 591
 592        va_start(ap, fmt);
 593        cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 594        va_end(ap);
 595        if (!cmdp)
 596                return RESP_BAD;
 597
 598        return get_cmd_result(ctx, cmdp);
 599}
 600
 601__attribute__((format (printf, 3, 4)))
 602static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
 603                       const char *fmt, ...)
 604{
 605        va_list ap;
 606        struct imap_cmd *cmdp;
 607
 608        va_start(ap, fmt);
 609        cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 610        va_end(ap);
 611        if (!cmdp)
 612                return DRV_STORE_BAD;
 613
 614        switch (get_cmd_result(ctx, cmdp)) {
 615        case RESP_BAD: return DRV_STORE_BAD;
 616        case RESP_NO: return DRV_MSG_BAD;
 617        default: return DRV_OK;
 618        }
 619}
 620
 621static int is_atom(struct imap_list *list)
 622{
 623        return list && list->val && list->val != NIL && list->val != LIST;
 624}
 625
 626static int is_list(struct imap_list *list)
 627{
 628        return list && list->val == LIST;
 629}
 630
 631static void free_list(struct imap_list *list)
 632{
 633        struct imap_list *tmp;
 634
 635        for (; list; list = tmp) {
 636                tmp = list->next;
 637                if (is_list(list))
 638                        free_list(list->child);
 639                else if (is_atom(list))
 640                        free(list->val);
 641                free(list);
 642        }
 643}
 644
 645static int parse_imap_list_l(struct imap *imap, char **sp, struct imap_list **curp, int level)
 646{
 647        struct imap_list *cur;
 648        char *s = *sp, *p;
 649        int n, bytes;
 650
 651        for (;;) {
 652                while (isspace((unsigned char)*s))
 653                        s++;
 654                if (level && *s == ')') {
 655                        s++;
 656                        break;
 657                }
 658                *curp = cur = xmalloc(sizeof(*cur));
 659                curp = &cur->next;
 660                cur->val = NULL; /* for clean bail */
 661                if (*s == '(') {
 662                        /* sublist */
 663                        s++;
 664                        cur->val = LIST;
 665                        if (parse_imap_list_l(imap, &s, &cur->child, level + 1))
 666                                goto bail;
 667                } else if (imap && *s == '{') {
 668                        /* literal */
 669                        bytes = cur->len = strtol(s + 1, &s, 10);
 670                        if (*s != '}')
 671                                goto bail;
 672
 673                        s = cur->val = xmalloc(cur->len);
 674
 675                        /* dump whats left over in the input buffer */
 676                        n = imap->buf.bytes - imap->buf.offset;
 677
 678                        if (n > bytes)
 679                                /* the entire message fit in the buffer */
 680                                n = bytes;
 681
 682                        memcpy(s, imap->buf.buf + imap->buf.offset, n);
 683                        s += n;
 684                        bytes -= n;
 685
 686                        /* mark that we used part of the buffer */
 687                        imap->buf.offset += n;
 688
 689                        /* now read the rest of the message */
 690                        while (bytes > 0) {
 691                                if ((n = socket_read(&imap->buf.sock, s, bytes)) <= 0)
 692                                        goto bail;
 693                                s += n;
 694                                bytes -= n;
 695                        }
 696
 697                        if (buffer_gets(&imap->buf, &s))
 698                                goto bail;
 699                } else if (*s == '"') {
 700                        /* quoted string */
 701                        s++;
 702                        p = s;
 703                        for (; *s != '"'; s++)
 704                                if (!*s)
 705                                        goto bail;
 706                        cur->len = s - p;
 707                        s++;
 708                        cur->val = xmemdupz(p, cur->len);
 709                } else {
 710                        /* atom */
 711                        p = s;
 712                        for (; *s && !isspace((unsigned char)*s); s++)
 713                                if (level && *s == ')')
 714                                        break;
 715                        cur->len = s - p;
 716                        if (cur->len == 3 && !memcmp("NIL", p, 3))
 717                                cur->val = NIL;
 718                        else
 719                                cur->val = xmemdupz(p, cur->len);
 720                }
 721
 722                if (!level)
 723                        break;
 724                if (!*s)
 725                        goto bail;
 726        }
 727        *sp = s;
 728        *curp = NULL;
 729        return 0;
 730
 731bail:
 732        *curp = NULL;
 733        return -1;
 734}
 735
 736static struct imap_list *parse_imap_list(struct imap *imap, char **sp)
 737{
 738        struct imap_list *head;
 739
 740        if (!parse_imap_list_l(imap, sp, &head, 0))
 741                return head;
 742        free_list(head);
 743        return NULL;
 744}
 745
 746static struct imap_list *parse_list(char **sp)
 747{
 748        return parse_imap_list(NULL, sp);
 749}
 750
 751static void parse_capability(struct imap *imap, char *cmd)
 752{
 753        char *arg;
 754        unsigned i;
 755
 756        imap->caps = 0x80000000;
 757        while ((arg = next_arg(&cmd)))
 758                for (i = 0; i < ARRAY_SIZE(cap_list); i++)
 759                        if (!strcmp(cap_list[i], arg))
 760                                imap->caps |= 1 << i;
 761        imap->rcaps = imap->caps;
 762}
 763
 764static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
 765                               char *s)
 766{
 767        struct imap *imap = ctx->imap;
 768        char *arg, *p;
 769
 770        if (*s != '[')
 771                return RESP_OK;         /* no response code */
 772        s++;
 773        if (!(p = strchr(s, ']'))) {
 774                fprintf(stderr, "IMAP error: malformed response code\n");
 775                return RESP_BAD;
 776        }
 777        *p++ = 0;
 778        arg = next_arg(&s);
 779        if (!strcmp("UIDVALIDITY", arg)) {
 780                if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg))) {
 781                        fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
 782                        return RESP_BAD;
 783                }
 784        } else if (!strcmp("UIDNEXT", arg)) {
 785                if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
 786                        fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
 787                        return RESP_BAD;
 788                }
 789        } else if (!strcmp("CAPABILITY", arg)) {
 790                parse_capability(imap, s);
 791        } else if (!strcmp("ALERT", arg)) {
 792                /* RFC2060 says that these messages MUST be displayed
 793                 * to the user
 794                 */
 795                for (; isspace((unsigned char)*p); p++);
 796                fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
 797        } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
 798                if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg)) ||
 799                    !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
 800                        fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
 801                        return RESP_BAD;
 802                }
 803        }
 804        return RESP_OK;
 805}
 806
 807static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
 808{
 809        struct imap *imap = ctx->imap;
 810        struct imap_cmd *cmdp, **pcmdp, *ncmdp;
 811        char *cmd, *arg, *arg1, *p;
 812        int n, resp, resp2, tag;
 813
 814        for (;;) {
 815                if (buffer_gets(&imap->buf, &cmd))
 816                        return RESP_BAD;
 817
 818                arg = next_arg(&cmd);
 819                if (*arg == '*') {
 820                        arg = next_arg(&cmd);
 821                        if (!arg) {
 822                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 823                                return RESP_BAD;
 824                        }
 825
 826                        if (!strcmp("NAMESPACE", arg)) {
 827                                imap->ns_personal = parse_list(&cmd);
 828                                imap->ns_other = parse_list(&cmd);
 829                                imap->ns_shared = parse_list(&cmd);
 830                        } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
 831                                   !strcmp("NO", arg) || !strcmp("BYE", arg)) {
 832                                if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
 833                                        return resp;
 834                        } else if (!strcmp("CAPABILITY", arg))
 835                                parse_capability(imap, cmd);
 836                        else if ((arg1 = next_arg(&cmd))) {
 837                                if (!strcmp("EXISTS", arg1))
 838                                        ctx->gen.count = atoi(arg);
 839                                else if (!strcmp("RECENT", arg1))
 840                                        ctx->gen.recent = atoi(arg);
 841                        } else {
 842                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 843                                return RESP_BAD;
 844                        }
 845                } else if (!imap->in_progress) {
 846                        fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
 847                        return RESP_BAD;
 848                } else if (*arg == '+') {
 849                        /* This can happen only with the last command underway, as
 850                           it enforces a round-trip. */
 851                        cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
 852                               offsetof(struct imap_cmd, next));
 853                        if (cmdp->cb.data) {
 854                                n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
 855                                free(cmdp->cb.data);
 856                                cmdp->cb.data = NULL;
 857                                if (n != (int)cmdp->cb.dlen)
 858                                        return RESP_BAD;
 859                        } else if (cmdp->cb.cont) {
 860                                if (cmdp->cb.cont(ctx, cmdp, cmd))
 861                                        return RESP_BAD;
 862                        } else {
 863                                fprintf(stderr, "IMAP error: unexpected command continuation request\n");
 864                                return RESP_BAD;
 865                        }
 866                        if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
 867                                return RESP_BAD;
 868                        if (!cmdp->cb.cont)
 869                                imap->literal_pending = 0;
 870                        if (!tcmd)
 871                                return DRV_OK;
 872                } else {
 873                        tag = atoi(arg);
 874                        for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
 875                                if (cmdp->tag == tag)
 876                                        goto gottag;
 877                        fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
 878                        return RESP_BAD;
 879                gottag:
 880                        if (!(*pcmdp = cmdp->next))
 881                                imap->in_progress_append = pcmdp;
 882                        imap->num_in_progress--;
 883                        if (cmdp->cb.cont || cmdp->cb.data)
 884                                imap->literal_pending = 0;
 885                        arg = next_arg(&cmd);
 886                        if (!strcmp("OK", arg))
 887                                resp = DRV_OK;
 888                        else {
 889                                if (!strcmp("NO", arg)) {
 890                                        if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
 891                                                p = strchr(cmdp->cmd, '"');
 892                                                if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", (int)(strchr(p + 1, '"') - p + 1), p)) {
 893                                                        resp = RESP_BAD;
 894                                                        goto normal;
 895                                                }
 896                                                /* not waiting here violates the spec, but a server that does not
 897                                                   grok this nonetheless violates it too. */
 898                                                cmdp->cb.create = 0;
 899                                                if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
 900                                                        resp = RESP_BAD;
 901                                                        goto normal;
 902                                                }
 903                                                free(cmdp->cmd);
 904                                                free(cmdp);
 905                                                if (!tcmd)
 906                                                        return 0;       /* ignored */
 907                                                if (cmdp == tcmd)
 908                                                        tcmd = ncmdp;
 909                                                continue;
 910                                        }
 911                                        resp = RESP_NO;
 912                                } else /*if (!strcmp("BAD", arg))*/
 913                                        resp = RESP_BAD;
 914                                fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
 915                                         memcmp(cmdp->cmd, "LOGIN", 5) ?
 916                                                        cmdp->cmd : "LOGIN <user> <pass>",
 917                                                        arg, cmd ? cmd : "");
 918                        }
 919                        if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
 920                                resp = resp2;
 921                normal:
 922                        if (cmdp->cb.done)
 923                                cmdp->cb.done(ctx, cmdp, resp);
 924                        free(cmdp->cb.data);
 925                        free(cmdp->cmd);
 926                        free(cmdp);
 927                        if (!tcmd || tcmd == cmdp)
 928                                return resp;
 929                }
 930        }
 931        /* not reached */
 932}
 933
 934static void imap_close_server(struct imap_store *ictx)
 935{
 936        struct imap *imap = ictx->imap;
 937
 938        if (imap->buf.sock.fd[0] != -1) {
 939                imap_exec(ictx, NULL, "LOGOUT");
 940                socket_shutdown(&imap->buf.sock);
 941        }
 942        free_list(imap->ns_personal);
 943        free_list(imap->ns_other);
 944        free_list(imap->ns_shared);
 945        free(imap);
 946}
 947
 948static void imap_close_store(struct store *ctx)
 949{
 950        imap_close_server((struct imap_store *)ctx);
 951        free_generic_messages(ctx->msgs);
 952        free(ctx);
 953}
 954
 955#ifndef NO_OPENSSL
 956
 957/*
 958 * hexchar() and cram() functions are based on the code from the isync
 959 * project (http://isync.sf.net/).
 960 */
 961static char hexchar(unsigned int b)
 962{
 963        return b < 10 ? '0' + b : 'a' + (b - 10);
 964}
 965
 966#define ENCODED_SIZE(n) (4*((n+2)/3))
 967static char *cram(const char *challenge_64, const char *user, const char *pass)
 968{
 969        int i, resp_len, encoded_len, decoded_len;
 970        HMAC_CTX hmac;
 971        unsigned char hash[16];
 972        char hex[33];
 973        char *response, *response_64, *challenge;
 974
 975        /*
 976         * length of challenge_64 (i.e. base-64 encoded string) is a good
 977         * enough upper bound for challenge (decoded result).
 978         */
 979        encoded_len = strlen(challenge_64);
 980        challenge = xmalloc(encoded_len);
 981        decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
 982                                      (unsigned char *)challenge_64, encoded_len);
 983        if (decoded_len < 0)
 984                die("invalid challenge %s", challenge_64);
 985        HMAC_Init(&hmac, (unsigned char *)pass, strlen(pass), EVP_md5());
 986        HMAC_Update(&hmac, (unsigned char *)challenge, decoded_len);
 987        HMAC_Final(&hmac, hash, NULL);
 988        HMAC_CTX_cleanup(&hmac);
 989
 990        hex[32] = 0;
 991        for (i = 0; i < 16; i++) {
 992                hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
 993                hex[2 * i + 1] = hexchar(hash[i] & 0xf);
 994        }
 995
 996        /* response: "<user> <digest in hex>" */
 997        resp_len = strlen(user) + 1 + strlen(hex) + 1;
 998        response = xmalloc(resp_len);
 999        sprintf(response, "%s %s", user, hex);
1000
1001        response_64 = xmalloc(ENCODED_SIZE(resp_len) + 1);
1002        encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
1003                                      (unsigned char *)response, resp_len);
1004        if (encoded_len < 0)
1005                die("EVP_EncodeBlock error");
1006        response_64[encoded_len] = '\0';
1007        return (char *)response_64;
1008}
1009
1010#else
1011
1012static char *cram(const char *challenge_64, const char *user, const char *pass)
1013{
1014        die("If you want to use CRAM-MD5 authenticate method, "
1015            "you have to build git-imap-send with OpenSSL library.");
1016}
1017
1018#endif
1019
1020static int auth_cram_md5(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt)
1021{
1022        int ret;
1023        char *response;
1024
1025        response = cram(prompt, server.user, server.pass);
1026
1027        ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
1028        if (ret != strlen(response))
1029                return error("IMAP error: sending response failed");
1030
1031        free(response);
1032
1033        return 0;
1034}
1035
1036static struct store *imap_open_store(struct imap_server_conf *srvc)
1037{
1038        struct imap_store *ctx;
1039        struct imap *imap;
1040        char *arg, *rsp;
1041        int s = -1, preauth;
1042
1043        ctx = xcalloc(sizeof(*ctx), 1);
1044
1045        ctx->imap = imap = xcalloc(sizeof(*imap), 1);
1046        imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
1047        imap->in_progress_append = &imap->in_progress;
1048
1049        /* open connection to IMAP server */
1050
1051        if (srvc->tunnel) {
1052                const char *argv[] = { srvc->tunnel, NULL };
1053                struct child_process tunnel = {NULL};
1054
1055                imap_info("Starting tunnel '%s'... ", srvc->tunnel);
1056
1057                tunnel.argv = argv;
1058                tunnel.use_shell = 1;
1059                tunnel.in = -1;
1060                tunnel.out = -1;
1061                if (start_command(&tunnel))
1062                        die("cannot start proxy %s", argv[0]);
1063
1064                imap->buf.sock.fd[0] = tunnel.out;
1065                imap->buf.sock.fd[1] = tunnel.in;
1066
1067                imap_info("ok\n");
1068        } else {
1069#ifndef NO_IPV6
1070                struct addrinfo hints, *ai0, *ai;
1071                int gai;
1072                char portstr[6];
1073
1074                snprintf(portstr, sizeof(portstr), "%d", srvc->port);
1075
1076                memset(&hints, 0, sizeof(hints));
1077                hints.ai_socktype = SOCK_STREAM;
1078                hints.ai_protocol = IPPROTO_TCP;
1079
1080                imap_info("Resolving %s... ", srvc->host);
1081                gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
1082                if (gai) {
1083                        fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
1084                        goto bail;
1085                }
1086                imap_info("ok\n");
1087
1088                for (ai0 = ai; ai; ai = ai->ai_next) {
1089                        char addr[NI_MAXHOST];
1090
1091                        s = socket(ai->ai_family, ai->ai_socktype,
1092                                   ai->ai_protocol);
1093                        if (s < 0)
1094                                continue;
1095
1096                        getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1097                                    sizeof(addr), NULL, 0, NI_NUMERICHOST);
1098                        imap_info("Connecting to [%s]:%s... ", addr, portstr);
1099
1100                        if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1101                                close(s);
1102                                s = -1;
1103                                perror("connect");
1104                                continue;
1105                        }
1106
1107                        break;
1108                }
1109                freeaddrinfo(ai0);
1110#else /* NO_IPV6 */
1111                struct hostent *he;
1112                struct sockaddr_in addr;
1113
1114                memset(&addr, 0, sizeof(addr));
1115                addr.sin_port = htons(srvc->port);
1116                addr.sin_family = AF_INET;
1117
1118                imap_info("Resolving %s... ", srvc->host);
1119                he = gethostbyname(srvc->host);
1120                if (!he) {
1121                        perror("gethostbyname");
1122                        goto bail;
1123                }
1124                imap_info("ok\n");
1125
1126                addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1127
1128                s = socket(PF_INET, SOCK_STREAM, 0);
1129
1130                imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1131                if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1132                        close(s);
1133                        s = -1;
1134                        perror("connect");
1135                }
1136#endif
1137                if (s < 0) {
1138                        fputs("Error: unable to connect to server.\n", stderr);
1139                        goto bail;
1140                }
1141
1142                imap->buf.sock.fd[0] = s;
1143                imap->buf.sock.fd[1] = dup(s);
1144
1145                if (srvc->use_ssl &&
1146                    ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1147                        close(s);
1148                        goto bail;
1149                }
1150                imap_info("ok\n");
1151        }
1152
1153        /* read the greeting string */
1154        if (buffer_gets(&imap->buf, &rsp)) {
1155                fprintf(stderr, "IMAP error: no greeting response\n");
1156                goto bail;
1157        }
1158        arg = next_arg(&rsp);
1159        if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1160                fprintf(stderr, "IMAP error: invalid greeting response\n");
1161                goto bail;
1162        }
1163        preauth = 0;
1164        if (!strcmp("PREAUTH", arg))
1165                preauth = 1;
1166        else if (strcmp("OK", arg) != 0) {
1167                fprintf(stderr, "IMAP error: unknown greeting response\n");
1168                goto bail;
1169        }
1170        parse_response_code(ctx, NULL, rsp);
1171        if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1172                goto bail;
1173
1174        if (!preauth) {
1175#ifndef NO_OPENSSL
1176                if (!srvc->use_ssl && CAP(STARTTLS)) {
1177                        if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK)
1178                                goto bail;
1179                        if (ssl_socket_connect(&imap->buf.sock, 1,
1180                                               srvc->ssl_verify))
1181                                goto bail;
1182                        /* capabilities may have changed, so get the new capabilities */
1183                        if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1184                                goto bail;
1185                }
1186#endif
1187                imap_info("Logging in...\n");
1188                if (!srvc->user) {
1189                        fprintf(stderr, "Skipping server %s, no user\n", srvc->host);
1190                        goto bail;
1191                }
1192                if (!srvc->pass) {
1193                        struct strbuf prompt = STRBUF_INIT;
1194                        strbuf_addf(&prompt, "Password (%s@%s): ", srvc->user, srvc->host);
1195                        arg = git_getpass(prompt.buf);
1196                        strbuf_release(&prompt);
1197                        if (!*arg) {
1198                                fprintf(stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host);
1199                                goto bail;
1200                        }
1201                        /*
1202                         * getpass() returns a pointer to a static buffer.  make a copy
1203                         * for long term storage.
1204                         */
1205                        srvc->pass = xstrdup(arg);
1206                }
1207                if (CAP(NOLOGIN)) {
1208                        fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1209                        goto bail;
1210                }
1211
1212                if (srvc->auth_method) {
1213                        struct imap_cmd_cb cb;
1214
1215                        if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1216                                if (!CAP(AUTH_CRAM_MD5)) {
1217                                        fprintf(stderr, "You specified"
1218                                                "CRAM-MD5 as authentication method, "
1219                                                "but %s doesn't support it.\n", srvc->host);
1220                                        goto bail;
1221                                }
1222                                /* CRAM-MD5 */
1223
1224                                memset(&cb, 0, sizeof(cb));
1225                                cb.cont = auth_cram_md5;
1226                                if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1227                                        fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1228                                        goto bail;
1229                                }
1230                        } else {
1231                                fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1232                                goto bail;
1233                        }
1234                } else {
1235                        if (!imap->buf.sock.ssl)
1236                                imap_warn("*** IMAP Warning *** Password is being "
1237                                          "sent in the clear\n");
1238                        if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1239                                fprintf(stderr, "IMAP error: LOGIN failed\n");
1240                                goto bail;
1241                        }
1242                }
1243        } /* !preauth */
1244
1245        ctx->prefix = "";
1246        ctx->trashnc = 1;
1247        return (struct store *)ctx;
1248
1249bail:
1250        imap_close_store(&ctx->gen);
1251        return NULL;
1252}
1253
1254static int imap_make_flags(int flags, char *buf)
1255{
1256        const char *s;
1257        unsigned i, d;
1258
1259        for (i = d = 0; i < ARRAY_SIZE(Flags); i++)
1260                if (flags & (1 << i)) {
1261                        buf[d++] = ' ';
1262                        buf[d++] = '\\';
1263                        for (s = Flags[i]; *s; s++)
1264                                buf[d++] = *s;
1265                }
1266        buf[0] = '(';
1267        buf[d++] = ')';
1268        return d;
1269}
1270
1271static void lf_to_crlf(struct msg_data *msg)
1272{
1273        char *new;
1274        int i, j, lfnum = 0;
1275
1276        if (msg->data[0] == '\n')
1277                lfnum++;
1278        for (i = 1; i < msg->len; i++) {
1279                if (msg->data[i - 1] != '\r' && msg->data[i] == '\n')
1280                        lfnum++;
1281        }
1282
1283        new = xmalloc(msg->len + lfnum + 1);
1284        if (msg->data[0] == '\n') {
1285                new[0] = '\r';
1286                new[1] = '\n';
1287                i = 1;
1288                j = 2;
1289        } else {
1290                new[0] = msg->data[0];
1291                i = 1;
1292                j = 1;
1293        }
1294        for ( ; i < msg->len; i++) {
1295                if (msg->data[i] != '\n') {
1296                        new[j++] = msg->data[i];
1297                        continue;
1298                }
1299                if (msg->data[i - 1] != '\r')
1300                        new[j++] = '\r';
1301                /* otherwise it already had CR before */
1302                new[j++] = '\n';
1303        }
1304        new[j] = '\0';
1305        msg->len += lfnum;
1306        free(msg->data);
1307        msg->data = new;
1308}
1309
1310static int imap_store_msg(struct store *gctx, struct msg_data *data)
1311{
1312        struct imap_store *ctx = (struct imap_store *)gctx;
1313        struct imap *imap = ctx->imap;
1314        struct imap_cmd_cb cb;
1315        const char *prefix, *box;
1316        int ret, d;
1317        char flagstr[128];
1318
1319        lf_to_crlf(data);
1320        memset(&cb, 0, sizeof(cb));
1321
1322        cb.dlen = data->len;
1323        cb.data = xmalloc(cb.dlen);
1324        memcpy(cb.data, data->data, data->len);
1325
1326        d = 0;
1327        if (data->flags) {
1328                d = imap_make_flags(data->flags, flagstr);
1329                flagstr[d++] = ' ';
1330        }
1331        flagstr[d] = 0;
1332
1333        box = gctx->name;
1334        prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1335        cb.create = 0;
1336        ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" %s", prefix, box, flagstr);
1337        imap->caps = imap->rcaps;
1338        if (ret != DRV_OK)
1339                return ret;
1340        gctx->count++;
1341
1342        return DRV_OK;
1343}
1344
1345static void encode_html_chars(struct strbuf *p)
1346{
1347        int i;
1348        for (i = 0; i < p->len; i++) {
1349                if (p->buf[i] == '&')
1350                        strbuf_splice(p, i, 1, "&amp;", 5);
1351                if (p->buf[i] == '<')
1352                        strbuf_splice(p, i, 1, "&lt;", 4);
1353                if (p->buf[i] == '>')
1354                        strbuf_splice(p, i, 1, "&gt;", 4);
1355                if (p->buf[i] == '"')
1356                        strbuf_splice(p, i, 1, "&quot;", 6);
1357        }
1358}
1359static void wrap_in_html(struct msg_data *msg)
1360{
1361        struct strbuf buf = STRBUF_INIT;
1362        struct strbuf **lines;
1363        struct strbuf **p;
1364        static char *content_type = "Content-Type: text/html;\n";
1365        static char *pre_open = "<pre>\n";
1366        static char *pre_close = "</pre>\n";
1367        int added_header = 0;
1368
1369        strbuf_attach(&buf, msg->data, msg->len, msg->len);
1370        lines = strbuf_split(&buf, '\n');
1371        strbuf_release(&buf);
1372        for (p = lines; *p; p++) {
1373                if (! added_header) {
1374                        if ((*p)->len == 1 && *((*p)->buf) == '\n') {
1375                                strbuf_addstr(&buf, content_type);
1376                                strbuf_addbuf(&buf, *p);
1377                                strbuf_addstr(&buf, pre_open);
1378                                added_header = 1;
1379                                continue;
1380                        }
1381                }
1382                else
1383                        encode_html_chars(*p);
1384                strbuf_addbuf(&buf, *p);
1385        }
1386        strbuf_addstr(&buf, pre_close);
1387        strbuf_list_free(lines);
1388        msg->len  = buf.len;
1389        msg->data = strbuf_detach(&buf, NULL);
1390}
1391
1392#define CHUNKSIZE 0x1000
1393
1394static int read_message(FILE *f, struct msg_data *msg)
1395{
1396        struct strbuf buf = STRBUF_INIT;
1397
1398        memset(msg, 0, sizeof(*msg));
1399
1400        do {
1401                if (strbuf_fread(&buf, CHUNKSIZE, f) <= 0)
1402                        break;
1403        } while (!feof(f));
1404
1405        msg->len  = buf.len;
1406        msg->data = strbuf_detach(&buf, NULL);
1407        return msg->len;
1408}
1409
1410static int count_messages(struct msg_data *msg)
1411{
1412        int count = 0;
1413        char *p = msg->data;
1414
1415        while (1) {
1416                if (!prefixcmp(p, "From ")) {
1417                        p = strstr(p+5, "\nFrom: ");
1418                        if (!p) break;
1419                        p = strstr(p+7, "\nDate: ");
1420                        if (!p) break;
1421                        p = strstr(p+7, "\nSubject: ");
1422                        if (!p) break;
1423                        p += 10;
1424                        count++;
1425                }
1426                p = strstr(p+5, "\nFrom ");
1427                if (!p)
1428                        break;
1429                p++;
1430        }
1431        return count;
1432}
1433
1434static int split_msg(struct msg_data *all_msgs, struct msg_data *msg, int *ofs)
1435{
1436        char *p, *data;
1437
1438        memset(msg, 0, sizeof *msg);
1439        if (*ofs >= all_msgs->len)
1440                return 0;
1441
1442        data = &all_msgs->data[*ofs];
1443        msg->len = all_msgs->len - *ofs;
1444
1445        if (msg->len < 5 || prefixcmp(data, "From "))
1446                return 0;
1447
1448        p = strchr(data, '\n');
1449        if (p) {
1450                p = &p[1];
1451                msg->len -= p-data;
1452                *ofs += p-data;
1453                data = p;
1454        }
1455
1456        p = strstr(data, "\nFrom ");
1457        if (p)
1458                msg->len = &p[1] - data;
1459
1460        msg->data = xmemdupz(data, msg->len);
1461        *ofs += msg->len;
1462        return 1;
1463}
1464
1465static char *imap_folder;
1466
1467static int git_imap_config(const char *key, const char *val, void *cb)
1468{
1469        char imap_key[] = "imap.";
1470
1471        if (strncmp(key, imap_key, sizeof imap_key - 1))
1472                return 0;
1473
1474        key += sizeof imap_key - 1;
1475
1476        /* check booleans first, and barf on others */
1477        if (!strcmp("sslverify", key))
1478                server.ssl_verify = git_config_bool(key, val);
1479        else if (!strcmp("preformattedhtml", key))
1480                server.use_html = git_config_bool(key, val);
1481        else if (!val)
1482                return config_error_nonbool(key);
1483
1484        if (!strcmp("folder", key)) {
1485                imap_folder = xstrdup(val);
1486        } else if (!strcmp("host", key)) {
1487                if (!prefixcmp(val, "imap:"))
1488                        val += 5;
1489                else if (!prefixcmp(val, "imaps:")) {
1490                        val += 6;
1491                        server.use_ssl = 1;
1492                }
1493                if (!prefixcmp(val, "//"))
1494                        val += 2;
1495                server.host = xstrdup(val);
1496        } else if (!strcmp("user", key))
1497                server.user = xstrdup(val);
1498        else if (!strcmp("pass", key))
1499                server.pass = xstrdup(val);
1500        else if (!strcmp("port", key))
1501                server.port = git_config_int(key, val);
1502        else if (!strcmp("tunnel", key))
1503                server.tunnel = xstrdup(val);
1504        else if (!strcmp("authmethod", key))
1505                server.auth_method = xstrdup(val);
1506
1507        return 0;
1508}
1509
1510int main(int argc, char **argv)
1511{
1512        struct msg_data all_msgs, msg;
1513        struct store *ctx = NULL;
1514        int ofs = 0;
1515        int r;
1516        int total, n = 0;
1517        int nongit_ok;
1518
1519        git_extract_argv0_path(argv[0]);
1520
1521        git_setup_gettext();
1522
1523        if (argc != 1)
1524                usage(imap_send_usage);
1525
1526        setup_git_directory_gently(&nongit_ok);
1527        git_config(git_imap_config, NULL);
1528
1529        if (!server.port)
1530                server.port = server.use_ssl ? 993 : 143;
1531
1532        if (!imap_folder) {
1533                fprintf(stderr, "no imap store specified\n");
1534                return 1;
1535        }
1536        if (!server.host) {
1537                if (!server.tunnel) {
1538                        fprintf(stderr, "no imap host specified\n");
1539                        return 1;
1540                }
1541                server.host = "tunnel";
1542        }
1543
1544        /* read the messages */
1545        if (!read_message(stdin, &all_msgs)) {
1546                fprintf(stderr, "nothing to send\n");
1547                return 1;
1548        }
1549
1550        total = count_messages(&all_msgs);
1551        if (!total) {
1552                fprintf(stderr, "no messages to send\n");
1553                return 1;
1554        }
1555
1556        /* write it to the imap server */
1557        ctx = imap_open_store(&server);
1558        if (!ctx) {
1559                fprintf(stderr, "failed to open store\n");
1560                return 1;
1561        }
1562
1563        fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1564        ctx->name = imap_folder;
1565        while (1) {
1566                unsigned percent = n * 100 / total;
1567                fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1568                if (!split_msg(&all_msgs, &msg, &ofs))
1569                        break;
1570                if (server.use_html)
1571                        wrap_in_html(&msg);
1572                r = imap_store_msg(ctx, &msg);
1573                if (r != DRV_OK)
1574                        break;
1575                n++;
1576        }
1577        fprintf(stderr, "\n");
1578
1579        imap_close_store(ctx);
1580
1581        return 0;
1582}