Andrew's git / gitweb.git / imap-send.c
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imap-send.con commit pickaxe: use textconv for -S counting (ef90ab6)
   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        char *data;
  73        int len;
  74        unsigned char flags;
  75};
  76
  77static const char imap_send_usage[] = "git imap-send < <mbox>";
  78
  79#undef DRV_OK
  80#define DRV_OK          0
  81#define DRV_MSG_BAD     -1
  82#define DRV_BOX_BAD     -2
  83#define DRV_STORE_BAD   -3
  84
  85static int Verbose, Quiet;
  86
  87__attribute__((format (printf, 1, 2)))
  88static void imap_info(const char *, ...);
  89__attribute__((format (printf, 1, 2)))
  90static void imap_warn(const char *, ...);
  91
  92static char *next_arg(char **);
  93
  94static void free_generic_messages(struct message *);
  95
  96__attribute__((format (printf, 3, 4)))
  97static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
  98
  99static int nfvasprintf(char **strp, const char *fmt, va_list ap)
 100{
 101        int len;
 102        char tmp[8192];
 103
 104        len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
 105        if (len < 0)
 106                die("Fatal: Out of memory");
 107        if (len >= sizeof(tmp))
 108                die("imap command overflow!");
 109        *strp = xmemdupz(tmp, len);
 110        return len;
 111}
 112
 113struct imap_server_conf {
 114        char *name;
 115        char *tunnel;
 116        char *host;
 117        int port;
 118        char *user;
 119        char *pass;
 120        int use_ssl;
 121        int ssl_verify;
 122        int use_html;
 123        char *auth_method;
 124};
 125
 126static struct imap_server_conf server = {
 127        NULL,   /* name */
 128        NULL,   /* tunnel */
 129        NULL,   /* host */
 130        0,      /* port */
 131        NULL,   /* user */
 132        NULL,   /* pass */
 133        0,      /* use_ssl */
 134        1,      /* ssl_verify */
 135        0,      /* use_html */
 136        NULL,   /* auth_method */
 137};
 138
 139struct imap_store_conf {
 140        struct store_conf gen;
 141        struct imap_server_conf *server;
 142};
 143
 144#define NIL     (void *)0x1
 145#define LIST    (void *)0x2
 146
 147struct imap_list {
 148        struct imap_list *next, *child;
 149        char *val;
 150        int len;
 151};
 152
 153struct imap_socket {
 154        int fd[2];
 155        SSL *ssl;
 156};
 157
 158struct imap_buffer {
 159        struct imap_socket sock;
 160        int bytes;
 161        int offset;
 162        char buf[1024];
 163};
 164
 165struct imap_cmd;
 166
 167struct imap {
 168        int uidnext; /* from SELECT responses */
 169        struct imap_list *ns_personal, *ns_other, *ns_shared; /* NAMESPACE info */
 170        unsigned caps, rcaps; /* CAPABILITY results */
 171        /* command queue */
 172        int nexttag, num_in_progress, literal_pending;
 173        struct imap_cmd *in_progress, **in_progress_append;
 174        struct imap_buffer buf; /* this is BIG, so put it last */
 175};
 176
 177struct imap_store {
 178        struct store gen;
 179        int uidvalidity;
 180        struct imap *imap;
 181        const char *prefix;
 182        unsigned /*currentnc:1,*/ trashnc:1;
 183};
 184
 185struct imap_cmd_cb {
 186        int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
 187        void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
 188        void *ctx;
 189        char *data;
 190        int dlen;
 191        int uid;
 192        unsigned create:1, trycreate:1;
 193};
 194
 195struct imap_cmd {
 196        struct imap_cmd *next;
 197        struct imap_cmd_cb cb;
 198        char *cmd;
 199        int tag;
 200};
 201
 202#define CAP(cap) (imap->caps & (1 << (cap)))
 203
 204enum CAPABILITY {
 205        NOLOGIN = 0,
 206        UIDPLUS,
 207        LITERALPLUS,
 208        NAMESPACE,
 209        STARTTLS,
 210        AUTH_CRAM_MD5
 211};
 212
 213static const char *cap_list[] = {
 214        "LOGINDISABLED",
 215        "UIDPLUS",
 216        "LITERAL+",
 217        "NAMESPACE",
 218        "STARTTLS",
 219        "AUTH=CRAM-MD5",
 220};
 221
 222#define RESP_OK    0
 223#define RESP_NO    1
 224#define RESP_BAD   2
 225
 226static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
 227
 228
 229static const char *Flags[] = {
 230        "Draft",
 231        "Flagged",
 232        "Answered",
 233        "Seen",
 234        "Deleted",
 235};
 236
 237#ifndef NO_OPENSSL
 238static void ssl_socket_perror(const char *func)
 239{
 240        fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
 241}
 242#endif
 243
 244static void socket_perror(const char *func, struct imap_socket *sock, int ret)
 245{
 246#ifndef NO_OPENSSL
 247        if (sock->ssl) {
 248                int sslerr = SSL_get_error(sock->ssl, ret);
 249                switch (sslerr) {
 250                case SSL_ERROR_NONE:
 251                        break;
 252                case SSL_ERROR_SYSCALL:
 253                        perror("SSL_connect");
 254                        break;
 255                default:
 256                        ssl_socket_perror("SSL_connect");
 257                        break;
 258                }
 259        } else
 260#endif
 261        {
 262                if (ret < 0)
 263                        perror(func);
 264                else
 265                        fprintf(stderr, "%s: unexpected EOF\n", func);
 266        }
 267}
 268
 269static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 270{
 271#ifdef NO_OPENSSL
 272        fprintf(stderr, "SSL requested but SSL support not compiled in\n");
 273        return -1;
 274#else
 275#if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
 276        const SSL_METHOD *meth;
 277#else
 278        SSL_METHOD *meth;
 279#endif
 280        SSL_CTX *ctx;
 281        int ret;
 282
 283        SSL_library_init();
 284        SSL_load_error_strings();
 285
 286        if (use_tls_only)
 287                meth = TLSv1_method();
 288        else
 289                meth = SSLv23_method();
 290
 291        if (!meth) {
 292                ssl_socket_perror("SSLv23_method");
 293                return -1;
 294        }
 295
 296        ctx = SSL_CTX_new(meth);
 297
 298        if (verify)
 299                SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
 300
 301        if (!SSL_CTX_set_default_verify_paths(ctx)) {
 302                ssl_socket_perror("SSL_CTX_set_default_verify_paths");
 303                return -1;
 304        }
 305        sock->ssl = SSL_new(ctx);
 306        if (!sock->ssl) {
 307                ssl_socket_perror("SSL_new");
 308                return -1;
 309        }
 310        if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
 311                ssl_socket_perror("SSL_set_rfd");
 312                return -1;
 313        }
 314        if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
 315                ssl_socket_perror("SSL_set_wfd");
 316                return -1;
 317        }
 318
 319        ret = SSL_connect(sock->ssl);
 320        if (ret <= 0) {
 321                socket_perror("SSL_connect", sock, ret);
 322                return -1;
 323        }
 324
 325        return 0;
 326#endif
 327}
 328
 329static int socket_read(struct imap_socket *sock, char *buf, int len)
 330{
 331        ssize_t n;
 332#ifndef NO_OPENSSL
 333        if (sock->ssl)
 334                n = SSL_read(sock->ssl, buf, len);
 335        else
 336#endif
 337                n = xread(sock->fd[0], buf, len);
 338        if (n <= 0) {
 339                socket_perror("read", sock, n);
 340                close(sock->fd[0]);
 341                close(sock->fd[1]);
 342                sock->fd[0] = sock->fd[1] = -1;
 343        }
 344        return n;
 345}
 346
 347static int socket_write(struct imap_socket *sock, const char *buf, int len)
 348{
 349        int n;
 350#ifndef NO_OPENSSL
 351        if (sock->ssl)
 352                n = SSL_write(sock->ssl, buf, len);
 353        else
 354#endif
 355                n = write_in_full(sock->fd[1], buf, len);
 356        if (n != len) {
 357                socket_perror("write", sock, n);
 358                close(sock->fd[0]);
 359                close(sock->fd[1]);
 360                sock->fd[0] = sock->fd[1] = -1;
 361        }
 362        return n;
 363}
 364
 365static void socket_shutdown(struct imap_socket *sock)
 366{
 367#ifndef NO_OPENSSL
 368        if (sock->ssl) {
 369                SSL_shutdown(sock->ssl);
 370                SSL_free(sock->ssl);
 371        }
 372#endif
 373        close(sock->fd[0]);
 374        close(sock->fd[1]);
 375}
 376
 377/* simple line buffering */
 378static int buffer_gets(struct imap_buffer *b, char **s)
 379{
 380        int n;
 381        int start = b->offset;
 382
 383        *s = b->buf + start;
 384
 385        for (;;) {
 386                /* make sure we have enough data to read the \r\n sequence */
 387                if (b->offset + 1 >= b->bytes) {
 388                        if (start) {
 389                                /* shift down used bytes */
 390                                *s = b->buf;
 391
 392                                assert(start <= b->bytes);
 393                                n = b->bytes - start;
 394
 395                                if (n)
 396                                        memmove(b->buf, b->buf + start, n);
 397                                b->offset -= start;
 398                                b->bytes = n;
 399                                start = 0;
 400                        }
 401
 402                        n = socket_read(&b->sock, b->buf + b->bytes,
 403                                         sizeof(b->buf) - b->bytes);
 404
 405                        if (n <= 0)
 406                                return -1;
 407
 408                        b->bytes += n;
 409                }
 410
 411                if (b->buf[b->offset] == '\r') {
 412                        assert(b->offset + 1 < b->bytes);
 413                        if (b->buf[b->offset + 1] == '\n') {
 414                                b->buf[b->offset] = 0;  /* terminate the string */
 415                                b->offset += 2; /* next line */
 416                                if (Verbose)
 417                                        puts(*s);
 418                                return 0;
 419                        }
 420                }
 421
 422                b->offset++;
 423        }
 424        /* not reached */
 425}
 426
 427static void imap_info(const char *msg, ...)
 428{
 429        va_list va;
 430
 431        if (!Quiet) {
 432                va_start(va, msg);
 433                vprintf(msg, va);
 434                va_end(va);
 435                fflush(stdout);
 436        }
 437}
 438
 439static void imap_warn(const char *msg, ...)
 440{
 441        va_list va;
 442
 443        if (Quiet < 2) {
 444                va_start(va, msg);
 445                vfprintf(stderr, msg, va);
 446                va_end(va);
 447        }
 448}
 449
 450static char *next_arg(char **s)
 451{
 452        char *ret;
 453
 454        if (!s || !*s)
 455                return NULL;
 456        while (isspace((unsigned char) **s))
 457                (*s)++;
 458        if (!**s) {
 459                *s = NULL;
 460                return NULL;
 461        }
 462        if (**s == '"') {
 463                ++*s;
 464                ret = *s;
 465                *s = strchr(*s, '"');
 466        } else {
 467                ret = *s;
 468                while (**s && !isspace((unsigned char) **s))
 469                        (*s)++;
 470        }
 471        if (*s) {
 472                if (**s)
 473                        *(*s)++ = 0;
 474                if (!**s)
 475                        *s = NULL;
 476        }
 477        return ret;
 478}
 479
 480static void free_generic_messages(struct message *msgs)
 481{
 482        struct message *tmsg;
 483
 484        for (; msgs; msgs = tmsg) {
 485                tmsg = msgs->next;
 486                free(msgs);
 487        }
 488}
 489
 490static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
 491{
 492        int ret;
 493        va_list va;
 494
 495        va_start(va, fmt);
 496        if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
 497                die("Fatal: buffer too small. Please report a bug.");
 498        va_end(va);
 499        return ret;
 500}
 501
 502static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
 503                                         struct imap_cmd_cb *cb,
 504                                         const char *fmt, va_list ap)
 505{
 506        struct imap *imap = ctx->imap;
 507        struct imap_cmd *cmd;
 508        int n, bufl;
 509        char buf[1024];
 510
 511        cmd = xmalloc(sizeof(struct imap_cmd));
 512        nfvasprintf(&cmd->cmd, fmt, ap);
 513        cmd->tag = ++imap->nexttag;
 514
 515        if (cb)
 516                cmd->cb = *cb;
 517        else
 518                memset(&cmd->cb, 0, sizeof(cmd->cb));
 519
 520        while (imap->literal_pending)
 521                get_cmd_result(ctx, NULL);
 522
 523        if (!cmd->cb.data)
 524                bufl = nfsnprintf(buf, sizeof(buf), "%d %s\r\n", cmd->tag, cmd->cmd);
 525        else
 526                bufl = nfsnprintf(buf, sizeof(buf), "%d %s{%d%s}\r\n",
 527                                  cmd->tag, cmd->cmd, cmd->cb.dlen,
 528                                  CAP(LITERALPLUS) ? "+" : "");
 529
 530        if (Verbose) {
 531                if (imap->num_in_progress)
 532                        printf("(%d in progress) ", imap->num_in_progress);
 533                if (memcmp(cmd->cmd, "LOGIN", 5))
 534                        printf(">>> %s", buf);
 535                else
 536                        printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
 537        }
 538        if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
 539                free(cmd->cmd);
 540                free(cmd);
 541                if (cb)
 542                        free(cb->data);
 543                return NULL;
 544        }
 545        if (cmd->cb.data) {
 546                if (CAP(LITERALPLUS)) {
 547                        n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
 548                        free(cmd->cb.data);
 549                        if (n != cmd->cb.dlen ||
 550                            socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
 551                                free(cmd->cmd);
 552                                free(cmd);
 553                                return NULL;
 554                        }
 555                        cmd->cb.data = NULL;
 556                } else
 557                        imap->literal_pending = 1;
 558        } else if (cmd->cb.cont)
 559                imap->literal_pending = 1;
 560        cmd->next = NULL;
 561        *imap->in_progress_append = cmd;
 562        imap->in_progress_append = &cmd->next;
 563        imap->num_in_progress++;
 564        return cmd;
 565}
 566
 567__attribute__((format (printf, 3, 4)))
 568static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
 569                                       struct imap_cmd_cb *cb,
 570                                       const char *fmt, ...)
 571{
 572        struct imap_cmd *ret;
 573        va_list ap;
 574
 575        va_start(ap, fmt);
 576        ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
 577        va_end(ap);
 578        return ret;
 579}
 580
 581__attribute__((format (printf, 3, 4)))
 582static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
 583                     const char *fmt, ...)
 584{
 585        va_list ap;
 586        struct imap_cmd *cmdp;
 587
 588        va_start(ap, fmt);
 589        cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 590        va_end(ap);
 591        if (!cmdp)
 592                return RESP_BAD;
 593
 594        return get_cmd_result(ctx, cmdp);
 595}
 596
 597__attribute__((format (printf, 3, 4)))
 598static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
 599                       const char *fmt, ...)
 600{
 601        va_list ap;
 602        struct imap_cmd *cmdp;
 603
 604        va_start(ap, fmt);
 605        cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 606        va_end(ap);
 607        if (!cmdp)
 608                return DRV_STORE_BAD;
 609
 610        switch (get_cmd_result(ctx, cmdp)) {
 611        case RESP_BAD: return DRV_STORE_BAD;
 612        case RESP_NO: return DRV_MSG_BAD;
 613        default: return DRV_OK;
 614        }
 615}
 616
 617static int is_atom(struct imap_list *list)
 618{
 619        return list && list->val && list->val != NIL && list->val != LIST;
 620}
 621
 622static int is_list(struct imap_list *list)
 623{
 624        return list && list->val == LIST;
 625}
 626
 627static void free_list(struct imap_list *list)
 628{
 629        struct imap_list *tmp;
 630
 631        for (; list; list = tmp) {
 632                tmp = list->next;
 633                if (is_list(list))
 634                        free_list(list->child);
 635                else if (is_atom(list))
 636                        free(list->val);
 637                free(list);
 638        }
 639}
 640
 641static int parse_imap_list_l(struct imap *imap, char **sp, struct imap_list **curp, int level)
 642{
 643        struct imap_list *cur;
 644        char *s = *sp, *p;
 645        int n, bytes;
 646
 647        for (;;) {
 648                while (isspace((unsigned char)*s))
 649                        s++;
 650                if (level && *s == ')') {
 651                        s++;
 652                        break;
 653                }
 654                *curp = cur = xmalloc(sizeof(*cur));
 655                curp = &cur->next;
 656                cur->val = NULL; /* for clean bail */
 657                if (*s == '(') {
 658                        /* sublist */
 659                        s++;
 660                        cur->val = LIST;
 661                        if (parse_imap_list_l(imap, &s, &cur->child, level + 1))
 662                                goto bail;
 663                } else if (imap && *s == '{') {
 664                        /* literal */
 665                        bytes = cur->len = strtol(s + 1, &s, 10);
 666                        if (*s != '}')
 667                                goto bail;
 668
 669                        s = cur->val = xmalloc(cur->len);
 670
 671                        /* dump whats left over in the input buffer */
 672                        n = imap->buf.bytes - imap->buf.offset;
 673
 674                        if (n > bytes)
 675                                /* the entire message fit in the buffer */
 676                                n = bytes;
 677
 678                        memcpy(s, imap->buf.buf + imap->buf.offset, n);
 679                        s += n;
 680                        bytes -= n;
 681
 682                        /* mark that we used part of the buffer */
 683                        imap->buf.offset += n;
 684
 685                        /* now read the rest of the message */
 686                        while (bytes > 0) {
 687                                if ((n = socket_read(&imap->buf.sock, s, bytes)) <= 0)
 688                                        goto bail;
 689                                s += n;
 690                                bytes -= n;
 691                        }
 692
 693                        if (buffer_gets(&imap->buf, &s))
 694                                goto bail;
 695                } else if (*s == '"') {
 696                        /* quoted string */
 697                        s++;
 698                        p = s;
 699                        for (; *s != '"'; s++)
 700                                if (!*s)
 701                                        goto bail;
 702                        cur->len = s - p;
 703                        s++;
 704                        cur->val = xmemdupz(p, cur->len);
 705                } else {
 706                        /* atom */
 707                        p = s;
 708                        for (; *s && !isspace((unsigned char)*s); s++)
 709                                if (level && *s == ')')
 710                                        break;
 711                        cur->len = s - p;
 712                        if (cur->len == 3 && !memcmp("NIL", p, 3))
 713                                cur->val = NIL;
 714                        else
 715                                cur->val = xmemdupz(p, cur->len);
 716                }
 717
 718                if (!level)
 719                        break;
 720                if (!*s)
 721                        goto bail;
 722        }
 723        *sp = s;
 724        *curp = NULL;
 725        return 0;
 726
 727bail:
 728        *curp = NULL;
 729        return -1;
 730}
 731
 732static struct imap_list *parse_imap_list(struct imap *imap, char **sp)
 733{
 734        struct imap_list *head;
 735
 736        if (!parse_imap_list_l(imap, sp, &head, 0))
 737                return head;
 738        free_list(head);
 739        return NULL;
 740}
 741
 742static struct imap_list *parse_list(char **sp)
 743{
 744        return parse_imap_list(NULL, sp);
 745}
 746
 747static void parse_capability(struct imap *imap, char *cmd)
 748{
 749        char *arg;
 750        unsigned i;
 751
 752        imap->caps = 0x80000000;
 753        while ((arg = next_arg(&cmd)))
 754                for (i = 0; i < ARRAY_SIZE(cap_list); i++)
 755                        if (!strcmp(cap_list[i], arg))
 756                                imap->caps |= 1 << i;
 757        imap->rcaps = imap->caps;
 758}
 759
 760static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
 761                               char *s)
 762{
 763        struct imap *imap = ctx->imap;
 764        char *arg, *p;
 765
 766        if (*s != '[')
 767                return RESP_OK;         /* no response code */
 768        s++;
 769        if (!(p = strchr(s, ']'))) {
 770                fprintf(stderr, "IMAP error: malformed response code\n");
 771                return RESP_BAD;
 772        }
 773        *p++ = 0;
 774        arg = next_arg(&s);
 775        if (!strcmp("UIDVALIDITY", arg)) {
 776                if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg))) {
 777                        fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
 778                        return RESP_BAD;
 779                }
 780        } else if (!strcmp("UIDNEXT", arg)) {
 781                if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
 782                        fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
 783                        return RESP_BAD;
 784                }
 785        } else if (!strcmp("CAPABILITY", arg)) {
 786                parse_capability(imap, s);
 787        } else if (!strcmp("ALERT", arg)) {
 788                /* RFC2060 says that these messages MUST be displayed
 789                 * to the user
 790                 */
 791                for (; isspace((unsigned char)*p); p++);
 792                fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
 793        } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
 794                if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg)) ||
 795                    !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
 796                        fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
 797                        return RESP_BAD;
 798                }
 799        }
 800        return RESP_OK;
 801}
 802
 803static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
 804{
 805        struct imap *imap = ctx->imap;
 806        struct imap_cmd *cmdp, **pcmdp, *ncmdp;
 807        char *cmd, *arg, *arg1, *p;
 808        int n, resp, resp2, tag;
 809
 810        for (;;) {
 811                if (buffer_gets(&imap->buf, &cmd))
 812                        return RESP_BAD;
 813
 814                arg = next_arg(&cmd);
 815                if (*arg == '*') {
 816                        arg = next_arg(&cmd);
 817                        if (!arg) {
 818                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 819                                return RESP_BAD;
 820                        }
 821
 822                        if (!strcmp("NAMESPACE", arg)) {
 823                                imap->ns_personal = parse_list(&cmd);
 824                                imap->ns_other = parse_list(&cmd);
 825                                imap->ns_shared = parse_list(&cmd);
 826                        } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
 827                                   !strcmp("NO", arg) || !strcmp("BYE", arg)) {
 828                                if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
 829                                        return resp;
 830                        } else if (!strcmp("CAPABILITY", arg))
 831                                parse_capability(imap, cmd);
 832                        else if ((arg1 = next_arg(&cmd))) {
 833                                if (!strcmp("EXISTS", arg1))
 834                                        ctx->gen.count = atoi(arg);
 835                                else if (!strcmp("RECENT", arg1))
 836                                        ctx->gen.recent = atoi(arg);
 837                        } else {
 838                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 839                                return RESP_BAD;
 840                        }
 841                } else if (!imap->in_progress) {
 842                        fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
 843                        return RESP_BAD;
 844                } else if (*arg == '+') {
 845                        /* This can happen only with the last command underway, as
 846                           it enforces a round-trip. */
 847                        cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
 848                               offsetof(struct imap_cmd, next));
 849                        if (cmdp->cb.data) {
 850                                n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
 851                                free(cmdp->cb.data);
 852                                cmdp->cb.data = NULL;
 853                                if (n != (int)cmdp->cb.dlen)
 854                                        return RESP_BAD;
 855                        } else if (cmdp->cb.cont) {
 856                                if (cmdp->cb.cont(ctx, cmdp, cmd))
 857                                        return RESP_BAD;
 858                        } else {
 859                                fprintf(stderr, "IMAP error: unexpected command continuation request\n");
 860                                return RESP_BAD;
 861                        }
 862                        if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
 863                                return RESP_BAD;
 864                        if (!cmdp->cb.cont)
 865                                imap->literal_pending = 0;
 866                        if (!tcmd)
 867                                return DRV_OK;
 868                } else {
 869                        tag = atoi(arg);
 870                        for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
 871                                if (cmdp->tag == tag)
 872                                        goto gottag;
 873                        fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
 874                        return RESP_BAD;
 875                gottag:
 876                        if (!(*pcmdp = cmdp->next))
 877                                imap->in_progress_append = pcmdp;
 878                        imap->num_in_progress--;
 879                        if (cmdp->cb.cont || cmdp->cb.data)
 880                                imap->literal_pending = 0;
 881                        arg = next_arg(&cmd);
 882                        if (!strcmp("OK", arg))
 883                                resp = DRV_OK;
 884                        else {
 885                                if (!strcmp("NO", arg)) {
 886                                        if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
 887                                                p = strchr(cmdp->cmd, '"');
 888                                                if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", (int)(strchr(p + 1, '"') - p + 1), p)) {
 889                                                        resp = RESP_BAD;
 890                                                        goto normal;
 891                                                }
 892                                                /* not waiting here violates the spec, but a server that does not
 893                                                   grok this nonetheless violates it too. */
 894                                                cmdp->cb.create = 0;
 895                                                if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
 896                                                        resp = RESP_BAD;
 897                                                        goto normal;
 898                                                }
 899                                                free(cmdp->cmd);
 900                                                free(cmdp);
 901                                                if (!tcmd)
 902                                                        return 0;       /* ignored */
 903                                                if (cmdp == tcmd)
 904                                                        tcmd = ncmdp;
 905                                                continue;
 906                                        }
 907                                        resp = RESP_NO;
 908                                } else /*if (!strcmp("BAD", arg))*/
 909                                        resp = RESP_BAD;
 910                                fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
 911                                         memcmp(cmdp->cmd, "LOGIN", 5) ?
 912                                                        cmdp->cmd : "LOGIN <user> <pass>",
 913                                                        arg, cmd ? cmd : "");
 914                        }
 915                        if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
 916                                resp = resp2;
 917                normal:
 918                        if (cmdp->cb.done)
 919                                cmdp->cb.done(ctx, cmdp, resp);
 920                        free(cmdp->cb.data);
 921                        free(cmdp->cmd);
 922                        free(cmdp);
 923                        if (!tcmd || tcmd == cmdp)
 924                                return resp;
 925                }
 926        }
 927        /* not reached */
 928}
 929
 930static void imap_close_server(struct imap_store *ictx)
 931{
 932        struct imap *imap = ictx->imap;
 933
 934        if (imap->buf.sock.fd[0] != -1) {
 935                imap_exec(ictx, NULL, "LOGOUT");
 936                socket_shutdown(&imap->buf.sock);
 937        }
 938        free_list(imap->ns_personal);
 939        free_list(imap->ns_other);
 940        free_list(imap->ns_shared);
 941        free(imap);
 942}
 943
 944static void imap_close_store(struct store *ctx)
 945{
 946        imap_close_server((struct imap_store *)ctx);
 947        free_generic_messages(ctx->msgs);
 948        free(ctx);
 949}
 950
 951#ifndef NO_OPENSSL
 952
 953/*
 954 * hexchar() and cram() functions are based on the code from the isync
 955 * project (http://isync.sf.net/).
 956 */
 957static char hexchar(unsigned int b)
 958{
 959        return b < 10 ? '0' + b : 'a' + (b - 10);
 960}
 961
 962#define ENCODED_SIZE(n) (4*((n+2)/3))
 963static char *cram(const char *challenge_64, const char *user, const char *pass)
 964{
 965        int i, resp_len, encoded_len, decoded_len;
 966        HMAC_CTX hmac;
 967        unsigned char hash[16];
 968        char hex[33];
 969        char *response, *response_64, *challenge;
 970
 971        /*
 972         * length of challenge_64 (i.e. base-64 encoded string) is a good
 973         * enough upper bound for challenge (decoded result).
 974         */
 975        encoded_len = strlen(challenge_64);
 976        challenge = xmalloc(encoded_len);
 977        decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
 978                                      (unsigned char *)challenge_64, encoded_len);
 979        if (decoded_len < 0)
 980                die("invalid challenge %s", challenge_64);
 981        HMAC_Init(&hmac, (unsigned char *)pass, strlen(pass), EVP_md5());
 982        HMAC_Update(&hmac, (unsigned char *)challenge, decoded_len);
 983        HMAC_Final(&hmac, hash, NULL);
 984        HMAC_CTX_cleanup(&hmac);
 985
 986        hex[32] = 0;
 987        for (i = 0; i < 16; i++) {
 988                hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
 989                hex[2 * i + 1] = hexchar(hash[i] & 0xf);
 990        }
 991
 992        /* response: "<user> <digest in hex>" */
 993        resp_len = strlen(user) + 1 + strlen(hex) + 1;
 994        response = xmalloc(resp_len);
 995        sprintf(response, "%s %s", user, hex);
 996
 997        response_64 = xmalloc(ENCODED_SIZE(resp_len) + 1);
 998        encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
 999                                      (unsigned char *)response, resp_len);
1000        if (encoded_len < 0)
1001                die("EVP_EncodeBlock error");
1002        response_64[encoded_len] = '\0';
1003        return (char *)response_64;
1004}
1005
1006#else
1007
1008static char *cram(const char *challenge_64, const char *user, const char *pass)
1009{
1010        die("If you want to use CRAM-MD5 authenticate method, "
1011            "you have to build git-imap-send with OpenSSL library.");
1012}
1013
1014#endif
1015
1016static int auth_cram_md5(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt)
1017{
1018        int ret;
1019        char *response;
1020
1021        response = cram(prompt, server.user, server.pass);
1022
1023        ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
1024        if (ret != strlen(response))
1025                return error("IMAP error: sending response failed");
1026
1027        free(response);
1028
1029        return 0;
1030}
1031
1032static struct store *imap_open_store(struct imap_server_conf *srvc)
1033{
1034        struct imap_store *ctx;
1035        struct imap *imap;
1036        char *arg, *rsp;
1037        int s = -1, preauth;
1038
1039        ctx = xcalloc(sizeof(*ctx), 1);
1040
1041        ctx->imap = imap = xcalloc(sizeof(*imap), 1);
1042        imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
1043        imap->in_progress_append = &imap->in_progress;
1044
1045        /* open connection to IMAP server */
1046
1047        if (srvc->tunnel) {
1048                const char *argv[] = { srvc->tunnel, NULL };
1049                struct child_process tunnel = {NULL};
1050
1051                imap_info("Starting tunnel '%s'... ", srvc->tunnel);
1052
1053                tunnel.argv = argv;
1054                tunnel.use_shell = 1;
1055                tunnel.in = -1;
1056                tunnel.out = -1;
1057                if (start_command(&tunnel))
1058                        die("cannot start proxy %s", argv[0]);
1059
1060                imap->buf.sock.fd[0] = tunnel.out;
1061                imap->buf.sock.fd[1] = tunnel.in;
1062
1063                imap_info("ok\n");
1064        } else {
1065#ifndef NO_IPV6
1066                struct addrinfo hints, *ai0, *ai;
1067                int gai;
1068                char portstr[6];
1069
1070                snprintf(portstr, sizeof(portstr), "%d", srvc->port);
1071
1072                memset(&hints, 0, sizeof(hints));
1073                hints.ai_socktype = SOCK_STREAM;
1074                hints.ai_protocol = IPPROTO_TCP;
1075
1076                imap_info("Resolving %s... ", srvc->host);
1077                gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
1078                if (gai) {
1079                        fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
1080                        goto bail;
1081                }
1082                imap_info("ok\n");
1083
1084                for (ai0 = ai; ai; ai = ai->ai_next) {
1085                        char addr[NI_MAXHOST];
1086
1087                        s = socket(ai->ai_family, ai->ai_socktype,
1088                                   ai->ai_protocol);
1089                        if (s < 0)
1090                                continue;
1091
1092                        getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1093                                    sizeof(addr), NULL, 0, NI_NUMERICHOST);
1094                        imap_info("Connecting to [%s]:%s... ", addr, portstr);
1095
1096                        if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1097                                close(s);
1098                                s = -1;
1099                                perror("connect");
1100                                continue;
1101                        }
1102
1103                        break;
1104                }
1105                freeaddrinfo(ai0);
1106#else /* NO_IPV6 */
1107                struct hostent *he;
1108                struct sockaddr_in addr;
1109
1110                memset(&addr, 0, sizeof(addr));
1111                addr.sin_port = htons(srvc->port);
1112                addr.sin_family = AF_INET;
1113
1114                imap_info("Resolving %s... ", srvc->host);
1115                he = gethostbyname(srvc->host);
1116                if (!he) {
1117                        perror("gethostbyname");
1118                        goto bail;
1119                }
1120                imap_info("ok\n");
1121
1122                addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1123
1124                s = socket(PF_INET, SOCK_STREAM, 0);
1125
1126                imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1127                if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1128                        close(s);
1129                        s = -1;
1130                        perror("connect");
1131                }
1132#endif
1133                if (s < 0) {
1134                        fputs("Error: unable to connect to server.\n", stderr);
1135                        goto bail;
1136                }
1137
1138                imap->buf.sock.fd[0] = s;
1139                imap->buf.sock.fd[1] = dup(s);
1140
1141                if (srvc->use_ssl &&
1142                    ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1143                        close(s);
1144                        goto bail;
1145                }
1146                imap_info("ok\n");
1147        }
1148
1149        /* read the greeting string */
1150        if (buffer_gets(&imap->buf, &rsp)) {
1151                fprintf(stderr, "IMAP error: no greeting response\n");
1152                goto bail;
1153        }
1154        arg = next_arg(&rsp);
1155        if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1156                fprintf(stderr, "IMAP error: invalid greeting response\n");
1157                goto bail;
1158        }
1159        preauth = 0;
1160        if (!strcmp("PREAUTH", arg))
1161                preauth = 1;
1162        else if (strcmp("OK", arg) != 0) {
1163                fprintf(stderr, "IMAP error: unknown greeting response\n");
1164                goto bail;
1165        }
1166        parse_response_code(ctx, NULL, rsp);
1167        if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1168                goto bail;
1169
1170        if (!preauth) {
1171#ifndef NO_OPENSSL
1172                if (!srvc->use_ssl && CAP(STARTTLS)) {
1173                        if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK)
1174                                goto bail;
1175                        if (ssl_socket_connect(&imap->buf.sock, 1,
1176                                               srvc->ssl_verify))
1177                                goto bail;
1178                        /* capabilities may have changed, so get the new capabilities */
1179                        if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1180                                goto bail;
1181                }
1182#endif
1183                imap_info("Logging in...\n");
1184                if (!srvc->user) {
1185                        fprintf(stderr, "Skipping server %s, no user\n", srvc->host);
1186                        goto bail;
1187                }
1188                if (!srvc->pass) {
1189                        struct strbuf prompt = STRBUF_INIT;
1190                        strbuf_addf(&prompt, "Password (%s@%s): ", srvc->user, srvc->host);
1191                        arg = git_getpass(prompt.buf);
1192                        strbuf_release(&prompt);
1193                        if (!*arg) {
1194                                fprintf(stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host);
1195                                goto bail;
1196                        }
1197                        /*
1198                         * getpass() returns a pointer to a static buffer.  make a copy
1199                         * for long term storage.
1200                         */
1201                        srvc->pass = xstrdup(arg);
1202                }
1203                if (CAP(NOLOGIN)) {
1204                        fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1205                        goto bail;
1206                }
1207
1208                if (srvc->auth_method) {
1209                        struct imap_cmd_cb cb;
1210
1211                        if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1212                                if (!CAP(AUTH_CRAM_MD5)) {
1213                                        fprintf(stderr, "You specified"
1214                                                "CRAM-MD5 as authentication method, "
1215                                                "but %s doesn't support it.\n", srvc->host);
1216                                        goto bail;
1217                                }
1218                                /* CRAM-MD5 */
1219
1220                                memset(&cb, 0, sizeof(cb));
1221                                cb.cont = auth_cram_md5;
1222                                if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1223                                        fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1224                                        goto bail;
1225                                }
1226                        } else {
1227                                fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1228                                goto bail;
1229                        }
1230                } else {
1231                        if (!imap->buf.sock.ssl)
1232                                imap_warn("*** IMAP Warning *** Password is being "
1233                                          "sent in the clear\n");
1234                        if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1235                                fprintf(stderr, "IMAP error: LOGIN failed\n");
1236                                goto bail;
1237                        }
1238                }
1239        } /* !preauth */
1240
1241        ctx->prefix = "";
1242        ctx->trashnc = 1;
1243        return (struct store *)ctx;
1244
1245bail:
1246        imap_close_store(&ctx->gen);
1247        return NULL;
1248}
1249
1250static int imap_make_flags(int flags, char *buf)
1251{
1252        const char *s;
1253        unsigned i, d;
1254
1255        for (i = d = 0; i < ARRAY_SIZE(Flags); i++)
1256                if (flags & (1 << i)) {
1257                        buf[d++] = ' ';
1258                        buf[d++] = '\\';
1259                        for (s = Flags[i]; *s; s++)
1260                                buf[d++] = *s;
1261                }
1262        buf[0] = '(';
1263        buf[d++] = ')';
1264        return d;
1265}
1266
1267static void lf_to_crlf(struct msg_data *msg)
1268{
1269        char *new;
1270        int i, j, lfnum = 0;
1271
1272        if (msg->data[0] == '\n')
1273                lfnum++;
1274        for (i = 1; i < msg->len; i++) {
1275                if (msg->data[i - 1] != '\r' && msg->data[i] == '\n')
1276                        lfnum++;
1277        }
1278
1279        new = xmalloc(msg->len + lfnum);
1280        if (msg->data[0] == '\n') {
1281                new[0] = '\r';
1282                new[1] = '\n';
1283                i = 1;
1284                j = 2;
1285        } else {
1286                new[0] = msg->data[0];
1287                i = 1;
1288                j = 1;
1289        }
1290        for ( ; i < msg->len; i++) {
1291                if (msg->data[i] != '\n') {
1292                        new[j++] = msg->data[i];
1293                        continue;
1294                }
1295                if (msg->data[i - 1] != '\r')
1296                        new[j++] = '\r';
1297                /* otherwise it already had CR before */
1298                new[j++] = '\n';
1299        }
1300        msg->len += lfnum;
1301        free(msg->data);
1302        msg->data = new;
1303}
1304
1305static int imap_store_msg(struct store *gctx, struct msg_data *data)
1306{
1307        struct imap_store *ctx = (struct imap_store *)gctx;
1308        struct imap *imap = ctx->imap;
1309        struct imap_cmd_cb cb;
1310        const char *prefix, *box;
1311        int ret, d;
1312        char flagstr[128];
1313
1314        lf_to_crlf(data);
1315        memset(&cb, 0, sizeof(cb));
1316
1317        cb.dlen = data->len;
1318        cb.data = xmalloc(cb.dlen);
1319        memcpy(cb.data, data->data, data->len);
1320
1321        d = 0;
1322        if (data->flags) {
1323                d = imap_make_flags(data->flags, flagstr);
1324                flagstr[d++] = ' ';
1325        }
1326        flagstr[d] = 0;
1327
1328        box = gctx->name;
1329        prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1330        cb.create = 0;
1331        ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" %s", prefix, box, flagstr);
1332        imap->caps = imap->rcaps;
1333        if (ret != DRV_OK)
1334                return ret;
1335        gctx->count++;
1336
1337        return DRV_OK;
1338}
1339
1340static void encode_html_chars(struct strbuf *p)
1341{
1342        int i;
1343        for (i = 0; i < p->len; i++) {
1344                if (p->buf[i] == '&')
1345                        strbuf_splice(p, i, 1, "&amp;", 5);
1346                if (p->buf[i] == '<')
1347                        strbuf_splice(p, i, 1, "&lt;", 4);
1348                if (p->buf[i] == '>')
1349                        strbuf_splice(p, i, 1, "&gt;", 4);
1350                if (p->buf[i] == '"')
1351                        strbuf_splice(p, i, 1, "&quot;", 6);
1352        }
1353}
1354static void wrap_in_html(struct msg_data *msg)
1355{
1356        struct strbuf buf = STRBUF_INIT;
1357        struct strbuf **lines;
1358        struct strbuf **p;
1359        static char *content_type = "Content-Type: text/html;\n";
1360        static char *pre_open = "<pre>\n";
1361        static char *pre_close = "</pre>\n";
1362        int added_header = 0;
1363
1364        strbuf_attach(&buf, msg->data, msg->len, msg->len);
1365        lines = strbuf_split(&buf, '\n');
1366        strbuf_release(&buf);
1367        for (p = lines; *p; p++) {
1368                if (! added_header) {
1369                        if ((*p)->len == 1 && *((*p)->buf) == '\n') {
1370                                strbuf_addstr(&buf, content_type);
1371                                strbuf_addbuf(&buf, *p);
1372                                strbuf_addstr(&buf, pre_open);
1373                                added_header = 1;
1374                                continue;
1375                        }
1376                }
1377                else
1378                        encode_html_chars(*p);
1379                strbuf_addbuf(&buf, *p);
1380        }
1381        strbuf_addstr(&buf, pre_close);
1382        strbuf_list_free(lines);
1383        msg->len  = buf.len;
1384        msg->data = strbuf_detach(&buf, NULL);
1385}
1386
1387#define CHUNKSIZE 0x1000
1388
1389static int read_message(FILE *f, struct msg_data *msg)
1390{
1391        struct strbuf buf = STRBUF_INIT;
1392
1393        memset(msg, 0, sizeof(*msg));
1394
1395        do {
1396                if (strbuf_fread(&buf, CHUNKSIZE, f) <= 0)
1397                        break;
1398        } while (!feof(f));
1399
1400        msg->len  = buf.len;
1401        msg->data = strbuf_detach(&buf, NULL);
1402        return msg->len;
1403}
1404
1405static int count_messages(struct msg_data *msg)
1406{
1407        int count = 0;
1408        char *p = msg->data;
1409
1410        while (1) {
1411                if (!prefixcmp(p, "From ")) {
1412                        p = strstr(p+5, "\nFrom: ");
1413                        if (!p) break;
1414                        p = strstr(p+7, "\nDate: ");
1415                        if (!p) break;
1416                        p = strstr(p+7, "\nSubject: ");
1417                        if (!p) break;
1418                        p += 10;
1419                        count++;
1420                }
1421                p = strstr(p+5, "\nFrom ");
1422                if (!p)
1423                        break;
1424                p++;
1425        }
1426        return count;
1427}
1428
1429static int split_msg(struct msg_data *all_msgs, struct msg_data *msg, int *ofs)
1430{
1431        char *p, *data;
1432
1433        memset(msg, 0, sizeof *msg);
1434        if (*ofs >= all_msgs->len)
1435                return 0;
1436
1437        data = &all_msgs->data[*ofs];
1438        msg->len = all_msgs->len - *ofs;
1439
1440        if (msg->len < 5 || prefixcmp(data, "From "))
1441                return 0;
1442
1443        p = strchr(data, '\n');
1444        if (p) {
1445                p = &p[1];
1446                msg->len -= p-data;
1447                *ofs += p-data;
1448                data = p;
1449        }
1450
1451        p = strstr(data, "\nFrom ");
1452        if (p)
1453                msg->len = &p[1] - data;
1454
1455        msg->data = xmemdupz(data, msg->len);
1456        *ofs += msg->len;
1457        return 1;
1458}
1459
1460static char *imap_folder;
1461
1462static int git_imap_config(const char *key, const char *val, void *cb)
1463{
1464        char imap_key[] = "imap.";
1465
1466        if (strncmp(key, imap_key, sizeof imap_key - 1))
1467                return 0;
1468
1469        key += sizeof imap_key - 1;
1470
1471        /* check booleans first, and barf on others */
1472        if (!strcmp("sslverify", key))
1473                server.ssl_verify = git_config_bool(key, val);
1474        else if (!strcmp("preformattedhtml", key))
1475                server.use_html = git_config_bool(key, val);
1476        else if (!val)
1477                return config_error_nonbool(key);
1478
1479        if (!strcmp("folder", key)) {
1480                imap_folder = xstrdup(val);
1481        } else if (!strcmp("host", key)) {
1482                if (!prefixcmp(val, "imap:"))
1483                        val += 5;
1484                else if (!prefixcmp(val, "imaps:")) {
1485                        val += 6;
1486                        server.use_ssl = 1;
1487                }
1488                if (!prefixcmp(val, "//"))
1489                        val += 2;
1490                server.host = xstrdup(val);
1491        } else if (!strcmp("user", key))
1492                server.user = xstrdup(val);
1493        else if (!strcmp("pass", key))
1494                server.pass = xstrdup(val);
1495        else if (!strcmp("port", key))
1496                server.port = git_config_int(key, val);
1497        else if (!strcmp("tunnel", key))
1498                server.tunnel = xstrdup(val);
1499        else if (!strcmp("authmethod", key))
1500                server.auth_method = xstrdup(val);
1501
1502        return 0;
1503}
1504
1505int main(int argc, char **argv)
1506{
1507        struct msg_data all_msgs, msg;
1508        struct store *ctx = NULL;
1509        int ofs = 0;
1510        int r;
1511        int total, n = 0;
1512        int nongit_ok;
1513
1514        git_extract_argv0_path(argv[0]);
1515
1516        git_setup_gettext();
1517
1518        if (argc != 1)
1519                usage(imap_send_usage);
1520
1521        setup_git_directory_gently(&nongit_ok);
1522        git_config(git_imap_config, NULL);
1523
1524        if (!server.port)
1525                server.port = server.use_ssl ? 993 : 143;
1526
1527        if (!imap_folder) {
1528                fprintf(stderr, "no imap store specified\n");
1529                return 1;
1530        }
1531        if (!server.host) {
1532                if (!server.tunnel) {
1533                        fprintf(stderr, "no imap host specified\n");
1534                        return 1;
1535                }
1536                server.host = "tunnel";
1537        }
1538
1539        /* read the messages */
1540        if (!read_message(stdin, &all_msgs)) {
1541                fprintf(stderr, "nothing to send\n");
1542                return 1;
1543        }
1544
1545        total = count_messages(&all_msgs);
1546        if (!total) {
1547                fprintf(stderr, "no messages to send\n");
1548                return 1;
1549        }
1550
1551        /* write it to the imap server */
1552        ctx = imap_open_store(&server);
1553        if (!ctx) {
1554                fprintf(stderr, "failed to open store\n");
1555                return 1;
1556        }
1557
1558        fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1559        ctx->name = imap_folder;
1560        while (1) {
1561                unsigned percent = n * 100 / total;
1562                fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1563                if (!split_msg(&all_msgs, &msg, &ofs))
1564                        break;
1565                if (server.use_html)
1566                        wrap_in_html(&msg);
1567                r = imap_store_msg(ctx, &msg);
1568                if (r != DRV_OK)
1569                        break;
1570                n++;
1571        }
1572        fprintf(stderr, "\n");
1573
1574        imap_close_store(ctx);
1575
1576        return 0;
1577}