Andrew's git / gitweb.git / imap-send.c
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imap-send.con commit t3508: add check_head_differs_from() helper function and use it (6bc83cd)
   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#ifdef NO_OPENSSL
  29typedef void *SSL;
  30#else
  31#include <openssl/evp.h>
  32#include <openssl/hmac.h>
  33#endif
  34
  35struct store_conf {
  36        char *name;
  37        const char *path; /* should this be here? its interpretation is driver-specific */
  38        char *map_inbox;
  39        char *trash;
  40        unsigned max_size; /* off_t is overkill */
  41        unsigned trash_remote_new:1, trash_only_new:1;
  42};
  43
  44struct string_list {
  45        struct string_list *next;
  46        char string[1];
  47};
  48
  49struct channel_conf {
  50        struct channel_conf *next;
  51        char *name;
  52        struct store_conf *master, *slave;
  53        char *master_name, *slave_name;
  54        char *sync_state;
  55        struct string_list *patterns;
  56        int mops, sops;
  57        unsigned max_messages; /* for slave only */
  58};
  59
  60struct group_conf {
  61        struct group_conf *next;
  62        char *name;
  63        struct string_list *channels;
  64};
  65
  66/* For message->status */
  67#define M_RECENT       (1<<0) /* unsyncable flag; maildir_* depend on this being 1<<0 */
  68#define M_DEAD         (1<<1) /* expunged */
  69#define M_FLAGS        (1<<2) /* flags fetched */
  70
  71struct message {
  72        struct message *next;
  73        /* struct string_list *keywords; */
  74        size_t size; /* zero implies "not fetched" */
  75        int uid;
  76        unsigned char flags, status;
  77};
  78
  79struct store {
  80        struct store_conf *conf; /* foreign */
  81
  82        /* currently open mailbox */
  83        const char *name; /* foreign! maybe preset? */
  84        char *path; /* own */
  85        struct message *msgs; /* own */
  86        int uidvalidity;
  87        unsigned char opts; /* maybe preset? */
  88        /* note that the following do _not_ reflect stats from msgs, but mailbox totals */
  89        int count; /* # of messages */
  90        int recent; /* # of recent messages - don't trust this beyond the initial read */
  91};
  92
  93struct msg_data {
  94        char *data;
  95        int len;
  96        unsigned char flags;
  97};
  98
  99static const char imap_send_usage[] = "git imap-send < <mbox>";
 100
 101#undef DRV_OK
 102#define DRV_OK          0
 103#define DRV_MSG_BAD     -1
 104#define DRV_BOX_BAD     -2
 105#define DRV_STORE_BAD   -3
 106
 107static int Verbose, Quiet;
 108
 109__attribute__((format (printf, 1, 2)))
 110static void imap_info(const char *, ...);
 111__attribute__((format (printf, 1, 2)))
 112static void imap_warn(const char *, ...);
 113
 114static char *next_arg(char **);
 115
 116static void free_generic_messages(struct message *);
 117
 118__attribute__((format (printf, 3, 4)))
 119static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
 120
 121static int nfvasprintf(char **strp, const char *fmt, va_list ap)
 122{
 123        int len;
 124        char tmp[8192];
 125
 126        len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
 127        if (len < 0)
 128                die("Fatal: Out of memory");
 129        if (len >= sizeof(tmp))
 130                die("imap command overflow!");
 131        *strp = xmemdupz(tmp, len);
 132        return len;
 133}
 134
 135struct imap_server_conf {
 136        char *name;
 137        char *tunnel;
 138        char *host;
 139        int port;
 140        char *user;
 141        char *pass;
 142        int use_ssl;
 143        int ssl_verify;
 144        int use_html;
 145        char *auth_method;
 146};
 147
 148static struct imap_server_conf server = {
 149        NULL,   /* name */
 150        NULL,   /* tunnel */
 151        NULL,   /* host */
 152        0,      /* port */
 153        NULL,   /* user */
 154        NULL,   /* pass */
 155        0,      /* use_ssl */
 156        1,      /* ssl_verify */
 157        0,      /* use_html */
 158        NULL,   /* auth_method */
 159};
 160
 161struct imap_store_conf {
 162        struct store_conf gen;
 163        struct imap_server_conf *server;
 164        unsigned use_namespace:1;
 165};
 166
 167#define NIL     (void *)0x1
 168#define LIST    (void *)0x2
 169
 170struct imap_list {
 171        struct imap_list *next, *child;
 172        char *val;
 173        int len;
 174};
 175
 176struct imap_socket {
 177        int fd[2];
 178        SSL *ssl;
 179};
 180
 181struct imap_buffer {
 182        struct imap_socket sock;
 183        int bytes;
 184        int offset;
 185        char buf[1024];
 186};
 187
 188struct imap_cmd;
 189
 190struct imap {
 191        int uidnext; /* from SELECT responses */
 192        struct imap_list *ns_personal, *ns_other, *ns_shared; /* NAMESPACE info */
 193        unsigned caps, rcaps; /* CAPABILITY results */
 194        /* command queue */
 195        int nexttag, num_in_progress, literal_pending;
 196        struct imap_cmd *in_progress, **in_progress_append;
 197        struct imap_buffer buf; /* this is BIG, so put it last */
 198};
 199
 200struct imap_store {
 201        struct store gen;
 202        int uidvalidity;
 203        struct imap *imap;
 204        const char *prefix;
 205        unsigned /*currentnc:1,*/ trashnc:1;
 206};
 207
 208struct imap_cmd_cb {
 209        int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
 210        void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
 211        void *ctx;
 212        char *data;
 213        int dlen;
 214        int uid;
 215        unsigned create:1, trycreate:1;
 216};
 217
 218struct imap_cmd {
 219        struct imap_cmd *next;
 220        struct imap_cmd_cb cb;
 221        char *cmd;
 222        int tag;
 223};
 224
 225#define CAP(cap) (imap->caps & (1 << (cap)))
 226
 227enum CAPABILITY {
 228        NOLOGIN = 0,
 229        UIDPLUS,
 230        LITERALPLUS,
 231        NAMESPACE,
 232        STARTTLS,
 233        AUTH_CRAM_MD5
 234};
 235
 236static const char *cap_list[] = {
 237        "LOGINDISABLED",
 238        "UIDPLUS",
 239        "LITERAL+",
 240        "NAMESPACE",
 241        "STARTTLS",
 242        "AUTH=CRAM-MD5",
 243};
 244
 245#define RESP_OK    0
 246#define RESP_NO    1
 247#define RESP_BAD   2
 248
 249static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
 250
 251
 252static const char *Flags[] = {
 253        "Draft",
 254        "Flagged",
 255        "Answered",
 256        "Seen",
 257        "Deleted",
 258};
 259
 260#ifndef NO_OPENSSL
 261static void ssl_socket_perror(const char *func)
 262{
 263        fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
 264}
 265#endif
 266
 267static void socket_perror(const char *func, struct imap_socket *sock, int ret)
 268{
 269#ifndef NO_OPENSSL
 270        if (sock->ssl) {
 271                int sslerr = SSL_get_error(sock->ssl, ret);
 272                switch (sslerr) {
 273                case SSL_ERROR_NONE:
 274                        break;
 275                case SSL_ERROR_SYSCALL:
 276                        perror("SSL_connect");
 277                        break;
 278                default:
 279                        ssl_socket_perror("SSL_connect");
 280                        break;
 281                }
 282        } else
 283#endif
 284        {
 285                if (ret < 0)
 286                        perror(func);
 287                else
 288                        fprintf(stderr, "%s: unexpected EOF\n", func);
 289        }
 290}
 291
 292static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 293{
 294#ifdef NO_OPENSSL
 295        fprintf(stderr, "SSL requested but SSL support not compiled in\n");
 296        return -1;
 297#else
 298#if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
 299        const SSL_METHOD *meth;
 300#else
 301        SSL_METHOD *meth;
 302#endif
 303        SSL_CTX *ctx;
 304        int ret;
 305
 306        SSL_library_init();
 307        SSL_load_error_strings();
 308
 309        if (use_tls_only)
 310                meth = TLSv1_method();
 311        else
 312                meth = SSLv23_method();
 313
 314        if (!meth) {
 315                ssl_socket_perror("SSLv23_method");
 316                return -1;
 317        }
 318
 319        ctx = SSL_CTX_new(meth);
 320
 321        if (verify)
 322                SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
 323
 324        if (!SSL_CTX_set_default_verify_paths(ctx)) {
 325                ssl_socket_perror("SSL_CTX_set_default_verify_paths");
 326                return -1;
 327        }
 328        sock->ssl = SSL_new(ctx);
 329        if (!sock->ssl) {
 330                ssl_socket_perror("SSL_new");
 331                return -1;
 332        }
 333        if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
 334                ssl_socket_perror("SSL_set_rfd");
 335                return -1;
 336        }
 337        if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
 338                ssl_socket_perror("SSL_set_wfd");
 339                return -1;
 340        }
 341
 342        ret = SSL_connect(sock->ssl);
 343        if (ret <= 0) {
 344                socket_perror("SSL_connect", sock, ret);
 345                return -1;
 346        }
 347
 348        return 0;
 349#endif
 350}
 351
 352static int socket_read(struct imap_socket *sock, char *buf, int len)
 353{
 354        ssize_t n;
 355#ifndef NO_OPENSSL
 356        if (sock->ssl)
 357                n = SSL_read(sock->ssl, buf, len);
 358        else
 359#endif
 360                n = xread(sock->fd[0], buf, len);
 361        if (n <= 0) {
 362                socket_perror("read", sock, n);
 363                close(sock->fd[0]);
 364                close(sock->fd[1]);
 365                sock->fd[0] = sock->fd[1] = -1;
 366        }
 367        return n;
 368}
 369
 370static int socket_write(struct imap_socket *sock, const char *buf, int len)
 371{
 372        int n;
 373#ifndef NO_OPENSSL
 374        if (sock->ssl)
 375                n = SSL_write(sock->ssl, buf, len);
 376        else
 377#endif
 378                n = write_in_full(sock->fd[1], buf, len);
 379        if (n != len) {
 380                socket_perror("write", sock, n);
 381                close(sock->fd[0]);
 382                close(sock->fd[1]);
 383                sock->fd[0] = sock->fd[1] = -1;
 384        }
 385        return n;
 386}
 387
 388static void socket_shutdown(struct imap_socket *sock)
 389{
 390#ifndef NO_OPENSSL
 391        if (sock->ssl) {
 392                SSL_shutdown(sock->ssl);
 393                SSL_free(sock->ssl);
 394        }
 395#endif
 396        close(sock->fd[0]);
 397        close(sock->fd[1]);
 398}
 399
 400/* simple line buffering */
 401static int buffer_gets(struct imap_buffer *b, char **s)
 402{
 403        int n;
 404        int start = b->offset;
 405
 406        *s = b->buf + start;
 407
 408        for (;;) {
 409                /* make sure we have enough data to read the \r\n sequence */
 410                if (b->offset + 1 >= b->bytes) {
 411                        if (start) {
 412                                /* shift down used bytes */
 413                                *s = b->buf;
 414
 415                                assert(start <= b->bytes);
 416                                n = b->bytes - start;
 417
 418                                if (n)
 419                                        memmove(b->buf, b->buf + start, n);
 420                                b->offset -= start;
 421                                b->bytes = n;
 422                                start = 0;
 423                        }
 424
 425                        n = socket_read(&b->sock, b->buf + b->bytes,
 426                                         sizeof(b->buf) - b->bytes);
 427
 428                        if (n <= 0)
 429                                return -1;
 430
 431                        b->bytes += n;
 432                }
 433
 434                if (b->buf[b->offset] == '\r') {
 435                        assert(b->offset + 1 < b->bytes);
 436                        if (b->buf[b->offset + 1] == '\n') {
 437                                b->buf[b->offset] = 0;  /* terminate the string */
 438                                b->offset += 2; /* next line */
 439                                if (Verbose)
 440                                        puts(*s);
 441                                return 0;
 442                        }
 443                }
 444
 445                b->offset++;
 446        }
 447        /* not reached */
 448}
 449
 450static void imap_info(const char *msg, ...)
 451{
 452        va_list va;
 453
 454        if (!Quiet) {
 455                va_start(va, msg);
 456                vprintf(msg, va);
 457                va_end(va);
 458                fflush(stdout);
 459        }
 460}
 461
 462static void imap_warn(const char *msg, ...)
 463{
 464        va_list va;
 465
 466        if (Quiet < 2) {
 467                va_start(va, msg);
 468                vfprintf(stderr, msg, va);
 469                va_end(va);
 470        }
 471}
 472
 473static char *next_arg(char **s)
 474{
 475        char *ret;
 476
 477        if (!s || !*s)
 478                return NULL;
 479        while (isspace((unsigned char) **s))
 480                (*s)++;
 481        if (!**s) {
 482                *s = NULL;
 483                return NULL;
 484        }
 485        if (**s == '"') {
 486                ++*s;
 487                ret = *s;
 488                *s = strchr(*s, '"');
 489        } else {
 490                ret = *s;
 491                while (**s && !isspace((unsigned char) **s))
 492                        (*s)++;
 493        }
 494        if (*s) {
 495                if (**s)
 496                        *(*s)++ = 0;
 497                if (!**s)
 498                        *s = NULL;
 499        }
 500        return ret;
 501}
 502
 503static void free_generic_messages(struct message *msgs)
 504{
 505        struct message *tmsg;
 506
 507        for (; msgs; msgs = tmsg) {
 508                tmsg = msgs->next;
 509                free(msgs);
 510        }
 511}
 512
 513static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
 514{
 515        int ret;
 516        va_list va;
 517
 518        va_start(va, fmt);
 519        if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
 520                die("Fatal: buffer too small. Please report a bug.");
 521        va_end(va);
 522        return ret;
 523}
 524
 525static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
 526                                         struct imap_cmd_cb *cb,
 527                                         const char *fmt, va_list ap)
 528{
 529        struct imap *imap = ctx->imap;
 530        struct imap_cmd *cmd;
 531        int n, bufl;
 532        char buf[1024];
 533
 534        cmd = xmalloc(sizeof(struct imap_cmd));
 535        nfvasprintf(&cmd->cmd, fmt, ap);
 536        cmd->tag = ++imap->nexttag;
 537
 538        if (cb)
 539                cmd->cb = *cb;
 540        else
 541                memset(&cmd->cb, 0, sizeof(cmd->cb));
 542
 543        while (imap->literal_pending)
 544                get_cmd_result(ctx, NULL);
 545
 546        bufl = nfsnprintf(buf, sizeof(buf), cmd->cb.data ? CAP(LITERALPLUS) ?
 547                           "%d %s{%d+}\r\n" : "%d %s{%d}\r\n" : "%d %s\r\n",
 548                           cmd->tag, cmd->cmd, cmd->cb.dlen);
 549        if (Verbose) {
 550                if (imap->num_in_progress)
 551                        printf("(%d in progress) ", imap->num_in_progress);
 552                if (memcmp(cmd->cmd, "LOGIN", 5))
 553                        printf(">>> %s", buf);
 554                else
 555                        printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
 556        }
 557        if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
 558                free(cmd->cmd);
 559                free(cmd);
 560                if (cb)
 561                        free(cb->data);
 562                return NULL;
 563        }
 564        if (cmd->cb.data) {
 565                if (CAP(LITERALPLUS)) {
 566                        n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
 567                        free(cmd->cb.data);
 568                        if (n != cmd->cb.dlen ||
 569                            socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
 570                                free(cmd->cmd);
 571                                free(cmd);
 572                                return NULL;
 573                        }
 574                        cmd->cb.data = NULL;
 575                } else
 576                        imap->literal_pending = 1;
 577        } else if (cmd->cb.cont)
 578                imap->literal_pending = 1;
 579        cmd->next = NULL;
 580        *imap->in_progress_append = cmd;
 581        imap->in_progress_append = &cmd->next;
 582        imap->num_in_progress++;
 583        return cmd;
 584}
 585
 586__attribute__((format (printf, 3, 4)))
 587static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
 588                                       struct imap_cmd_cb *cb,
 589                                       const char *fmt, ...)
 590{
 591        struct imap_cmd *ret;
 592        va_list ap;
 593
 594        va_start(ap, fmt);
 595        ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
 596        va_end(ap);
 597        return ret;
 598}
 599
 600__attribute__((format (printf, 3, 4)))
 601static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
 602                     const char *fmt, ...)
 603{
 604        va_list ap;
 605        struct imap_cmd *cmdp;
 606
 607        va_start(ap, fmt);
 608        cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 609        va_end(ap);
 610        if (!cmdp)
 611                return RESP_BAD;
 612
 613        return get_cmd_result(ctx, cmdp);
 614}
 615
 616__attribute__((format (printf, 3, 4)))
 617static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
 618                       const char *fmt, ...)
 619{
 620        va_list ap;
 621        struct imap_cmd *cmdp;
 622
 623        va_start(ap, fmt);
 624        cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 625        va_end(ap);
 626        if (!cmdp)
 627                return DRV_STORE_BAD;
 628
 629        switch (get_cmd_result(ctx, cmdp)) {
 630        case RESP_BAD: return DRV_STORE_BAD;
 631        case RESP_NO: return DRV_MSG_BAD;
 632        default: return DRV_OK;
 633        }
 634}
 635
 636static int is_atom(struct imap_list *list)
 637{
 638        return list && list->val && list->val != NIL && list->val != LIST;
 639}
 640
 641static int is_list(struct imap_list *list)
 642{
 643        return list && list->val == LIST;
 644}
 645
 646static void free_list(struct imap_list *list)
 647{
 648        struct imap_list *tmp;
 649
 650        for (; list; list = tmp) {
 651                tmp = list->next;
 652                if (is_list(list))
 653                        free_list(list->child);
 654                else if (is_atom(list))
 655                        free(list->val);
 656                free(list);
 657        }
 658}
 659
 660static int parse_imap_list_l(struct imap *imap, char **sp, struct imap_list **curp, int level)
 661{
 662        struct imap_list *cur;
 663        char *s = *sp, *p;
 664        int n, bytes;
 665
 666        for (;;) {
 667                while (isspace((unsigned char)*s))
 668                        s++;
 669                if (level && *s == ')') {
 670                        s++;
 671                        break;
 672                }
 673                *curp = cur = xmalloc(sizeof(*cur));
 674                curp = &cur->next;
 675                cur->val = NULL; /* for clean bail */
 676                if (*s == '(') {
 677                        /* sublist */
 678                        s++;
 679                        cur->val = LIST;
 680                        if (parse_imap_list_l(imap, &s, &cur->child, level + 1))
 681                                goto bail;
 682                } else if (imap && *s == '{') {
 683                        /* literal */
 684                        bytes = cur->len = strtol(s + 1, &s, 10);
 685                        if (*s != '}')
 686                                goto bail;
 687
 688                        s = cur->val = xmalloc(cur->len);
 689
 690                        /* dump whats left over in the input buffer */
 691                        n = imap->buf.bytes - imap->buf.offset;
 692
 693                        if (n > bytes)
 694                                /* the entire message fit in the buffer */
 695                                n = bytes;
 696
 697                        memcpy(s, imap->buf.buf + imap->buf.offset, n);
 698                        s += n;
 699                        bytes -= n;
 700
 701                        /* mark that we used part of the buffer */
 702                        imap->buf.offset += n;
 703
 704                        /* now read the rest of the message */
 705                        while (bytes > 0) {
 706                                if ((n = socket_read(&imap->buf.sock, s, bytes)) <= 0)
 707                                        goto bail;
 708                                s += n;
 709                                bytes -= n;
 710                        }
 711
 712                        if (buffer_gets(&imap->buf, &s))
 713                                goto bail;
 714                } else if (*s == '"') {
 715                        /* quoted string */
 716                        s++;
 717                        p = s;
 718                        for (; *s != '"'; s++)
 719                                if (!*s)
 720                                        goto bail;
 721                        cur->len = s - p;
 722                        s++;
 723                        cur->val = xmemdupz(p, cur->len);
 724                } else {
 725                        /* atom */
 726                        p = s;
 727                        for (; *s && !isspace((unsigned char)*s); s++)
 728                                if (level && *s == ')')
 729                                        break;
 730                        cur->len = s - p;
 731                        if (cur->len == 3 && !memcmp("NIL", p, 3))
 732                                cur->val = NIL;
 733                        else
 734                                cur->val = xmemdupz(p, cur->len);
 735                }
 736
 737                if (!level)
 738                        break;
 739                if (!*s)
 740                        goto bail;
 741        }
 742        *sp = s;
 743        *curp = NULL;
 744        return 0;
 745
 746bail:
 747        *curp = NULL;
 748        return -1;
 749}
 750
 751static struct imap_list *parse_imap_list(struct imap *imap, char **sp)
 752{
 753        struct imap_list *head;
 754
 755        if (!parse_imap_list_l(imap, sp, &head, 0))
 756                return head;
 757        free_list(head);
 758        return NULL;
 759}
 760
 761static struct imap_list *parse_list(char **sp)
 762{
 763        return parse_imap_list(NULL, sp);
 764}
 765
 766static void parse_capability(struct imap *imap, char *cmd)
 767{
 768        char *arg;
 769        unsigned i;
 770
 771        imap->caps = 0x80000000;
 772        while ((arg = next_arg(&cmd)))
 773                for (i = 0; i < ARRAY_SIZE(cap_list); i++)
 774                        if (!strcmp(cap_list[i], arg))
 775                                imap->caps |= 1 << i;
 776        imap->rcaps = imap->caps;
 777}
 778
 779static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
 780                               char *s)
 781{
 782        struct imap *imap = ctx->imap;
 783        char *arg, *p;
 784
 785        if (*s != '[')
 786                return RESP_OK;         /* no response code */
 787        s++;
 788        if (!(p = strchr(s, ']'))) {
 789                fprintf(stderr, "IMAP error: malformed response code\n");
 790                return RESP_BAD;
 791        }
 792        *p++ = 0;
 793        arg = next_arg(&s);
 794        if (!strcmp("UIDVALIDITY", arg)) {
 795                if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg))) {
 796                        fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
 797                        return RESP_BAD;
 798                }
 799        } else if (!strcmp("UIDNEXT", arg)) {
 800                if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
 801                        fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
 802                        return RESP_BAD;
 803                }
 804        } else if (!strcmp("CAPABILITY", arg)) {
 805                parse_capability(imap, s);
 806        } else if (!strcmp("ALERT", arg)) {
 807                /* RFC2060 says that these messages MUST be displayed
 808                 * to the user
 809                 */
 810                for (; isspace((unsigned char)*p); p++);
 811                fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
 812        } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
 813                if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg)) ||
 814                    !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
 815                        fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
 816                        return RESP_BAD;
 817                }
 818        }
 819        return RESP_OK;
 820}
 821
 822static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
 823{
 824        struct imap *imap = ctx->imap;
 825        struct imap_cmd *cmdp, **pcmdp, *ncmdp;
 826        char *cmd, *arg, *arg1, *p;
 827        int n, resp, resp2, tag;
 828
 829        for (;;) {
 830                if (buffer_gets(&imap->buf, &cmd))
 831                        return RESP_BAD;
 832
 833                arg = next_arg(&cmd);
 834                if (*arg == '*') {
 835                        arg = next_arg(&cmd);
 836                        if (!arg) {
 837                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 838                                return RESP_BAD;
 839                        }
 840
 841                        if (!strcmp("NAMESPACE", arg)) {
 842                                imap->ns_personal = parse_list(&cmd);
 843                                imap->ns_other = parse_list(&cmd);
 844                                imap->ns_shared = parse_list(&cmd);
 845                        } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
 846                                   !strcmp("NO", arg) || !strcmp("BYE", arg)) {
 847                                if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
 848                                        return resp;
 849                        } else if (!strcmp("CAPABILITY", arg))
 850                                parse_capability(imap, cmd);
 851                        else if ((arg1 = next_arg(&cmd))) {
 852                                if (!strcmp("EXISTS", arg1))
 853                                        ctx->gen.count = atoi(arg);
 854                                else if (!strcmp("RECENT", arg1))
 855                                        ctx->gen.recent = atoi(arg);
 856                        } else {
 857                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 858                                return RESP_BAD;
 859                        }
 860                } else if (!imap->in_progress) {
 861                        fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
 862                        return RESP_BAD;
 863                } else if (*arg == '+') {
 864                        /* This can happen only with the last command underway, as
 865                           it enforces a round-trip. */
 866                        cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
 867                               offsetof(struct imap_cmd, next));
 868                        if (cmdp->cb.data) {
 869                                n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
 870                                free(cmdp->cb.data);
 871                                cmdp->cb.data = NULL;
 872                                if (n != (int)cmdp->cb.dlen)
 873                                        return RESP_BAD;
 874                        } else if (cmdp->cb.cont) {
 875                                if (cmdp->cb.cont(ctx, cmdp, cmd))
 876                                        return RESP_BAD;
 877                        } else {
 878                                fprintf(stderr, "IMAP error: unexpected command continuation request\n");
 879                                return RESP_BAD;
 880                        }
 881                        if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
 882                                return RESP_BAD;
 883                        if (!cmdp->cb.cont)
 884                                imap->literal_pending = 0;
 885                        if (!tcmd)
 886                                return DRV_OK;
 887                } else {
 888                        tag = atoi(arg);
 889                        for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
 890                                if (cmdp->tag == tag)
 891                                        goto gottag;
 892                        fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
 893                        return RESP_BAD;
 894                gottag:
 895                        if (!(*pcmdp = cmdp->next))
 896                                imap->in_progress_append = pcmdp;
 897                        imap->num_in_progress--;
 898                        if (cmdp->cb.cont || cmdp->cb.data)
 899                                imap->literal_pending = 0;
 900                        arg = next_arg(&cmd);
 901                        if (!strcmp("OK", arg))
 902                                resp = DRV_OK;
 903                        else {
 904                                if (!strcmp("NO", arg)) {
 905                                        if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
 906                                                p = strchr(cmdp->cmd, '"');
 907                                                if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", (int)(strchr(p + 1, '"') - p + 1), p)) {
 908                                                        resp = RESP_BAD;
 909                                                        goto normal;
 910                                                }
 911                                                /* not waiting here violates the spec, but a server that does not
 912                                                   grok this nonetheless violates it too. */
 913                                                cmdp->cb.create = 0;
 914                                                if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
 915                                                        resp = RESP_BAD;
 916                                                        goto normal;
 917                                                }
 918                                                free(cmdp->cmd);
 919                                                free(cmdp);
 920                                                if (!tcmd)
 921                                                        return 0;       /* ignored */
 922                                                if (cmdp == tcmd)
 923                                                        tcmd = ncmdp;
 924                                                continue;
 925                                        }
 926                                        resp = RESP_NO;
 927                                } else /*if (!strcmp("BAD", arg))*/
 928                                        resp = RESP_BAD;
 929                                fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
 930                                         memcmp(cmdp->cmd, "LOGIN", 5) ?
 931                                                        cmdp->cmd : "LOGIN <user> <pass>",
 932                                                        arg, cmd ? cmd : "");
 933                        }
 934                        if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
 935                                resp = resp2;
 936                normal:
 937                        if (cmdp->cb.done)
 938                                cmdp->cb.done(ctx, cmdp, resp);
 939                        free(cmdp->cb.data);
 940                        free(cmdp->cmd);
 941                        free(cmdp);
 942                        if (!tcmd || tcmd == cmdp)
 943                                return resp;
 944                }
 945        }
 946        /* not reached */
 947}
 948
 949static void imap_close_server(struct imap_store *ictx)
 950{
 951        struct imap *imap = ictx->imap;
 952
 953        if (imap->buf.sock.fd[0] != -1) {
 954                imap_exec(ictx, NULL, "LOGOUT");
 955                socket_shutdown(&imap->buf.sock);
 956        }
 957        free_list(imap->ns_personal);
 958        free_list(imap->ns_other);
 959        free_list(imap->ns_shared);
 960        free(imap);
 961}
 962
 963static void imap_close_store(struct store *ctx)
 964{
 965        imap_close_server((struct imap_store *)ctx);
 966        free_generic_messages(ctx->msgs);
 967        free(ctx);
 968}
 969
 970#ifndef NO_OPENSSL
 971
 972/*
 973 * hexchar() and cram() functions are based on the code from the isync
 974 * project (http://isync.sf.net/).
 975 */
 976static char hexchar(unsigned int b)
 977{
 978        return b < 10 ? '0' + b : 'a' + (b - 10);
 979}
 980
 981#define ENCODED_SIZE(n) (4*((n+2)/3))
 982static char *cram(const char *challenge_64, const char *user, const char *pass)
 983{
 984        int i, resp_len, encoded_len, decoded_len;
 985        HMAC_CTX hmac;
 986        unsigned char hash[16];
 987        char hex[33];
 988        char *response, *response_64, *challenge;
 989
 990        /*
 991         * length of challenge_64 (i.e. base-64 encoded string) is a good
 992         * enough upper bound for challenge (decoded result).
 993         */
 994        encoded_len = strlen(challenge_64);
 995        challenge = xmalloc(encoded_len);
 996        decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
 997                                      (unsigned char *)challenge_64, encoded_len);
 998        if (decoded_len < 0)
 999                die("invalid challenge %s", challenge_64);
1000        HMAC_Init(&hmac, (unsigned char *)pass, strlen(pass), EVP_md5());
1001        HMAC_Update(&hmac, (unsigned char *)challenge, decoded_len);
1002        HMAC_Final(&hmac, hash, NULL);
1003        HMAC_CTX_cleanup(&hmac);
1004
1005        hex[32] = 0;
1006        for (i = 0; i < 16; i++) {
1007                hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
1008                hex[2 * i + 1] = hexchar(hash[i] & 0xf);
1009        }
1010
1011        /* response: "<user> <digest in hex>" */
1012        resp_len = strlen(user) + 1 + strlen(hex) + 1;
1013        response = xmalloc(resp_len);
1014        sprintf(response, "%s %s", user, hex);
1015
1016        response_64 = xmalloc(ENCODED_SIZE(resp_len) + 1);
1017        encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
1018                                      (unsigned char *)response, resp_len);
1019        if (encoded_len < 0)
1020                die("EVP_EncodeBlock error");
1021        response_64[encoded_len] = '\0';
1022        return (char *)response_64;
1023}
1024
1025#else
1026
1027static char *cram(const char *challenge_64, const char *user, const char *pass)
1028{
1029        die("If you want to use CRAM-MD5 authenticate method, "
1030            "you have to build git-imap-send with OpenSSL library.");
1031}
1032
1033#endif
1034
1035static int auth_cram_md5(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt)
1036{
1037        int ret;
1038        char *response;
1039
1040        response = cram(prompt, server.user, server.pass);
1041
1042        ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
1043        if (ret != strlen(response))
1044                return error("IMAP error: sending response failed\n");
1045
1046        free(response);
1047
1048        return 0;
1049}
1050
1051static struct store *imap_open_store(struct imap_server_conf *srvc)
1052{
1053        struct imap_store *ctx;
1054        struct imap *imap;
1055        char *arg, *rsp;
1056        int s = -1, preauth;
1057
1058        ctx = xcalloc(sizeof(*ctx), 1);
1059
1060        ctx->imap = imap = xcalloc(sizeof(*imap), 1);
1061        imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
1062        imap->in_progress_append = &imap->in_progress;
1063
1064        /* open connection to IMAP server */
1065
1066        if (srvc->tunnel) {
1067                const char *argv[] = { srvc->tunnel, NULL };
1068                struct child_process tunnel = {0};
1069
1070                imap_info("Starting tunnel '%s'... ", srvc->tunnel);
1071
1072                tunnel.argv = argv;
1073                tunnel.use_shell = 1;
1074                tunnel.in = -1;
1075                tunnel.out = -1;
1076                if (start_command(&tunnel))
1077                        die("cannot start proxy %s", argv[0]);
1078
1079                imap->buf.sock.fd[0] = tunnel.out;
1080                imap->buf.sock.fd[1] = tunnel.in;
1081
1082                imap_info("ok\n");
1083        } else {
1084#ifndef NO_IPV6
1085                struct addrinfo hints, *ai0, *ai;
1086                int gai;
1087                char portstr[6];
1088
1089                snprintf(portstr, sizeof(portstr), "%hu", srvc->port);
1090
1091                memset(&hints, 0, sizeof(hints));
1092                hints.ai_socktype = SOCK_STREAM;
1093                hints.ai_protocol = IPPROTO_TCP;
1094
1095                imap_info("Resolving %s... ", srvc->host);
1096                gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
1097                if (gai) {
1098                        fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
1099                        goto bail;
1100                }
1101                imap_info("ok\n");
1102
1103                for (ai0 = ai; ai; ai = ai->ai_next) {
1104                        char addr[NI_MAXHOST];
1105
1106                        s = socket(ai->ai_family, ai->ai_socktype,
1107                                   ai->ai_protocol);
1108                        if (s < 0)
1109                                continue;
1110
1111                        getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1112                                    sizeof(addr), NULL, 0, NI_NUMERICHOST);
1113                        imap_info("Connecting to [%s]:%s... ", addr, portstr);
1114
1115                        if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1116                                close(s);
1117                                s = -1;
1118                                perror("connect");
1119                                continue;
1120                        }
1121
1122                        break;
1123                }
1124                freeaddrinfo(ai0);
1125#else /* NO_IPV6 */
1126                struct hostent *he;
1127                struct sockaddr_in addr;
1128
1129                memset(&addr, 0, sizeof(addr));
1130                addr.sin_port = htons(srvc->port);
1131                addr.sin_family = AF_INET;
1132
1133                imap_info("Resolving %s... ", srvc->host);
1134                he = gethostbyname(srvc->host);
1135                if (!he) {
1136                        perror("gethostbyname");
1137                        goto bail;
1138                }
1139                imap_info("ok\n");
1140
1141                addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1142
1143                s = socket(PF_INET, SOCK_STREAM, 0);
1144
1145                imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1146                if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1147                        close(s);
1148                        s = -1;
1149                        perror("connect");
1150                }
1151#endif
1152                if (s < 0) {
1153                        fputs("Error: unable to connect to server.\n", stderr);
1154                        goto bail;
1155                }
1156
1157                imap->buf.sock.fd[0] = s;
1158                imap->buf.sock.fd[1] = dup(s);
1159
1160                if (srvc->use_ssl &&
1161                    ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1162                        close(s);
1163                        goto bail;
1164                }
1165                imap_info("ok\n");
1166        }
1167
1168        /* read the greeting string */
1169        if (buffer_gets(&imap->buf, &rsp)) {
1170                fprintf(stderr, "IMAP error: no greeting response\n");
1171                goto bail;
1172        }
1173        arg = next_arg(&rsp);
1174        if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1175                fprintf(stderr, "IMAP error: invalid greeting response\n");
1176                goto bail;
1177        }
1178        preauth = 0;
1179        if (!strcmp("PREAUTH", arg))
1180                preauth = 1;
1181        else if (strcmp("OK", arg) != 0) {
1182                fprintf(stderr, "IMAP error: unknown greeting response\n");
1183                goto bail;
1184        }
1185        parse_response_code(ctx, NULL, rsp);
1186        if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1187                goto bail;
1188
1189        if (!preauth) {
1190#ifndef NO_OPENSSL
1191                if (!srvc->use_ssl && CAP(STARTTLS)) {
1192                        if (imap_exec(ctx, 0, "STARTTLS") != RESP_OK)
1193                                goto bail;
1194                        if (ssl_socket_connect(&imap->buf.sock, 1,
1195                                               srvc->ssl_verify))
1196                                goto bail;
1197                        /* capabilities may have changed, so get the new capabilities */
1198                        if (imap_exec(ctx, 0, "CAPABILITY") != RESP_OK)
1199                                goto bail;
1200                }
1201#endif
1202                imap_info("Logging in...\n");
1203                if (!srvc->user) {
1204                        fprintf(stderr, "Skipping server %s, no user\n", srvc->host);
1205                        goto bail;
1206                }
1207                if (!srvc->pass) {
1208                        char prompt[80];
1209                        sprintf(prompt, "Password (%s@%s): ", srvc->user, srvc->host);
1210                        arg = git_getpass(prompt);
1211                        if (!arg) {
1212                                perror("getpass");
1213                                exit(1);
1214                        }
1215                        if (!*arg) {
1216                                fprintf(stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host);
1217                                goto bail;
1218                        }
1219                        /*
1220                         * getpass() returns a pointer to a static buffer.  make a copy
1221                         * for long term storage.
1222                         */
1223                        srvc->pass = xstrdup(arg);
1224                }
1225                if (CAP(NOLOGIN)) {
1226                        fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1227                        goto bail;
1228                }
1229
1230                if (srvc->auth_method) {
1231                        struct imap_cmd_cb cb;
1232
1233                        if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1234                                if (!CAP(AUTH_CRAM_MD5)) {
1235                                        fprintf(stderr, "You specified"
1236                                                "CRAM-MD5 as authentication method, "
1237                                                "but %s doesn't support it.\n", srvc->host);
1238                                        goto bail;
1239                                }
1240                                /* CRAM-MD5 */
1241
1242                                memset(&cb, 0, sizeof(cb));
1243                                cb.cont = auth_cram_md5;
1244                                if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1245                                        fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1246                                        goto bail;
1247                                }
1248                        } else {
1249                                fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1250                                goto bail;
1251                        }
1252                } else {
1253                        if (!imap->buf.sock.ssl)
1254                                imap_warn("*** IMAP Warning *** Password is being "
1255                                          "sent in the clear\n");
1256                        if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1257                                fprintf(stderr, "IMAP error: LOGIN failed\n");
1258                                goto bail;
1259                        }
1260                }
1261        } /* !preauth */
1262
1263        ctx->prefix = "";
1264        ctx->trashnc = 1;
1265        return (struct store *)ctx;
1266
1267bail:
1268        imap_close_store(&ctx->gen);
1269        return NULL;
1270}
1271
1272static int imap_make_flags(int flags, char *buf)
1273{
1274        const char *s;
1275        unsigned i, d;
1276
1277        for (i = d = 0; i < ARRAY_SIZE(Flags); i++)
1278                if (flags & (1 << i)) {
1279                        buf[d++] = ' ';
1280                        buf[d++] = '\\';
1281                        for (s = Flags[i]; *s; s++)
1282                                buf[d++] = *s;
1283                }
1284        buf[0] = '(';
1285        buf[d++] = ')';
1286        return d;
1287}
1288
1289static void lf_to_crlf(struct msg_data *msg)
1290{
1291        char *new;
1292        int i, j, lfnum = 0;
1293
1294        if (msg->data[0] == '\n')
1295                lfnum++;
1296        for (i = 1; i < msg->len; i++) {
1297                if (msg->data[i - 1] != '\r' && msg->data[i] == '\n')
1298                        lfnum++;
1299        }
1300
1301        new = xmalloc(msg->len + lfnum);
1302        if (msg->data[0] == '\n') {
1303                new[0] = '\r';
1304                new[1] = '\n';
1305                i = 1;
1306                j = 2;
1307        } else {
1308                new[0] = msg->data[0];
1309                i = 1;
1310                j = 1;
1311        }
1312        for ( ; i < msg->len; i++) {
1313                if (msg->data[i] != '\n') {
1314                        new[j++] = msg->data[i];
1315                        continue;
1316                }
1317                if (msg->data[i - 1] != '\r')
1318                        new[j++] = '\r';
1319                /* otherwise it already had CR before */
1320                new[j++] = '\n';
1321        }
1322        msg->len += lfnum;
1323        free(msg->data);
1324        msg->data = new;
1325}
1326
1327static int imap_store_msg(struct store *gctx, struct msg_data *data)
1328{
1329        struct imap_store *ctx = (struct imap_store *)gctx;
1330        struct imap *imap = ctx->imap;
1331        struct imap_cmd_cb cb;
1332        const char *prefix, *box;
1333        int ret, d;
1334        char flagstr[128];
1335
1336        lf_to_crlf(data);
1337        memset(&cb, 0, sizeof(cb));
1338
1339        cb.dlen = data->len;
1340        cb.data = xmalloc(cb.dlen);
1341        memcpy(cb.data, data->data, data->len);
1342
1343        d = 0;
1344        if (data->flags) {
1345                d = imap_make_flags(data->flags, flagstr);
1346                flagstr[d++] = ' ';
1347        }
1348        flagstr[d] = 0;
1349
1350        box = gctx->name;
1351        prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1352        cb.create = 0;
1353        ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" %s", prefix, box, flagstr);
1354        imap->caps = imap->rcaps;
1355        if (ret != DRV_OK)
1356                return ret;
1357        gctx->count++;
1358
1359        return DRV_OK;
1360}
1361
1362static void encode_html_chars(struct strbuf *p)
1363{
1364        int i;
1365        for (i = 0; i < p->len; i++) {
1366                if (p->buf[i] == '&')
1367                        strbuf_splice(p, i, 1, "&amp;", 5);
1368                if (p->buf[i] == '<')
1369                        strbuf_splice(p, i, 1, "&lt;", 4);
1370                if (p->buf[i] == '>')
1371                        strbuf_splice(p, i, 1, "&gt;", 4);
1372                if (p->buf[i] == '"')
1373                        strbuf_splice(p, i, 1, "&quot;", 6);
1374        }
1375}
1376static void wrap_in_html(struct msg_data *msg)
1377{
1378        struct strbuf buf = STRBUF_INIT;
1379        struct strbuf **lines;
1380        struct strbuf **p;
1381        static char *content_type = "Content-Type: text/html;\n";
1382        static char *pre_open = "<pre>\n";
1383        static char *pre_close = "</pre>\n";
1384        int added_header = 0;
1385
1386        strbuf_attach(&buf, msg->data, msg->len, msg->len);
1387        lines = strbuf_split(&buf, '\n');
1388        strbuf_release(&buf);
1389        for (p = lines; *p; p++) {
1390                if (! added_header) {
1391                        if ((*p)->len == 1 && *((*p)->buf) == '\n') {
1392                                strbuf_addstr(&buf, content_type);
1393                                strbuf_addbuf(&buf, *p);
1394                                strbuf_addstr(&buf, pre_open);
1395                                added_header = 1;
1396                                continue;
1397                        }
1398                }
1399                else
1400                        encode_html_chars(*p);
1401                strbuf_addbuf(&buf, *p);
1402        }
1403        strbuf_addstr(&buf, pre_close);
1404        strbuf_list_free(lines);
1405        msg->len  = buf.len;
1406        msg->data = strbuf_detach(&buf, NULL);
1407}
1408
1409#define CHUNKSIZE 0x1000
1410
1411static int read_message(FILE *f, struct msg_data *msg)
1412{
1413        struct strbuf buf = STRBUF_INIT;
1414
1415        memset(msg, 0, sizeof(*msg));
1416
1417        do {
1418                if (strbuf_fread(&buf, CHUNKSIZE, f) <= 0)
1419                        break;
1420        } while (!feof(f));
1421
1422        msg->len  = buf.len;
1423        msg->data = strbuf_detach(&buf, NULL);
1424        return msg->len;
1425}
1426
1427static int count_messages(struct msg_data *msg)
1428{
1429        int count = 0;
1430        char *p = msg->data;
1431
1432        while (1) {
1433                if (!prefixcmp(p, "From ")) {
1434                        p = strstr(p+5, "\nFrom: ");
1435                        if (!p) break;
1436                        p = strstr(p+7, "\nDate: ");
1437                        if (!p) break;
1438                        p = strstr(p+7, "\nSubject: ");
1439                        if (!p) break;
1440                        p += 10;
1441                        count++;
1442                }
1443                p = strstr(p+5, "\nFrom ");
1444                if (!p)
1445                        break;
1446                p++;
1447        }
1448        return count;
1449}
1450
1451static int split_msg(struct msg_data *all_msgs, struct msg_data *msg, int *ofs)
1452{
1453        char *p, *data;
1454
1455        memset(msg, 0, sizeof *msg);
1456        if (*ofs >= all_msgs->len)
1457                return 0;
1458
1459        data = &all_msgs->data[*ofs];
1460        msg->len = all_msgs->len - *ofs;
1461
1462        if (msg->len < 5 || prefixcmp(data, "From "))
1463                return 0;
1464
1465        p = strchr(data, '\n');
1466        if (p) {
1467                p = &p[1];
1468                msg->len -= p-data;
1469                *ofs += p-data;
1470                data = p;
1471        }
1472
1473        p = strstr(data, "\nFrom ");
1474        if (p)
1475                msg->len = &p[1] - data;
1476
1477        msg->data = xmemdupz(data, msg->len);
1478        *ofs += msg->len;
1479        return 1;
1480}
1481
1482static char *imap_folder;
1483
1484static int git_imap_config(const char *key, const char *val, void *cb)
1485{
1486        char imap_key[] = "imap.";
1487
1488        if (strncmp(key, imap_key, sizeof imap_key - 1))
1489                return 0;
1490
1491        key += sizeof imap_key - 1;
1492
1493        /* check booleans first, and barf on others */
1494        if (!strcmp("sslverify", key))
1495                server.ssl_verify = git_config_bool(key, val);
1496        else if (!strcmp("preformattedhtml", key))
1497                server.use_html = git_config_bool(key, val);
1498        else if (!val)
1499                return config_error_nonbool(key);
1500
1501        if (!strcmp("folder", key)) {
1502                imap_folder = xstrdup(val);
1503        } else if (!strcmp("host", key)) {
1504                if (!prefixcmp(val, "imap:"))
1505                        val += 5;
1506                else if (!prefixcmp(val, "imaps:")) {
1507                        val += 6;
1508                        server.use_ssl = 1;
1509                }
1510                if (!prefixcmp(val, "//"))
1511                        val += 2;
1512                server.host = xstrdup(val);
1513        } else if (!strcmp("user", key))
1514                server.user = xstrdup(val);
1515        else if (!strcmp("pass", key))
1516                server.pass = xstrdup(val);
1517        else if (!strcmp("port", key))
1518                server.port = git_config_int(key, val);
1519        else if (!strcmp("tunnel", key))
1520                server.tunnel = xstrdup(val);
1521        else if (!strcmp("authmethod", key))
1522                server.auth_method = xstrdup(val);
1523
1524        return 0;
1525}
1526
1527int main(int argc, char **argv)
1528{
1529        struct msg_data all_msgs, msg;
1530        struct store *ctx = NULL;
1531        int ofs = 0;
1532        int r;
1533        int total, n = 0;
1534        int nongit_ok;
1535
1536        git_extract_argv0_path(argv[0]);
1537
1538        if (argc != 1)
1539                usage(imap_send_usage);
1540
1541        setup_git_directory_gently(&nongit_ok);
1542        git_config(git_imap_config, NULL);
1543
1544        if (!server.port)
1545                server.port = server.use_ssl ? 993 : 143;
1546
1547        if (!imap_folder) {
1548                fprintf(stderr, "no imap store specified\n");
1549                return 1;
1550        }
1551        if (!server.host) {
1552                if (!server.tunnel) {
1553                        fprintf(stderr, "no imap host specified\n");
1554                        return 1;
1555                }
1556                server.host = "tunnel";
1557        }
1558
1559        /* read the messages */
1560        if (!read_message(stdin, &all_msgs)) {
1561                fprintf(stderr, "nothing to send\n");
1562                return 1;
1563        }
1564
1565        total = count_messages(&all_msgs);
1566        if (!total) {
1567                fprintf(stderr, "no messages to send\n");
1568                return 1;
1569        }
1570
1571        /* write it to the imap server */
1572        ctx = imap_open_store(&server);
1573        if (!ctx) {
1574                fprintf(stderr, "failed to open store\n");
1575                return 1;
1576        }
1577
1578        fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1579        ctx->name = imap_folder;
1580        while (1) {
1581                unsigned percent = n * 100 / total;
1582                fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1583                if (!split_msg(&all_msgs, &msg, &ofs))
1584                        break;
1585                if (server.use_html)
1586                        wrap_in_html(&msg);
1587                r = imap_store_msg(ctx, &msg);
1588                if (r != DRV_OK)
1589                        break;
1590                n++;
1591        }
1592        fprintf(stderr, "\n");
1593
1594        imap_close_store(ctx);
1595
1596        return 0;
1597}