imap-send.con commit Merge branch 'ss/clone-depth-single-doc' into maint (2db7d79)
   1/*
   2 * git-imap-send - drops patches into an imap Drafts folder
   3 *                 derived from isync/mbsync - mailbox synchronizer
   4 *
   5 * Copyright (C) 2000-2002 Michael R. Elkins <me@mutt.org>
   6 * Copyright (C) 2002-2004 Oswald Buddenhagen <ossi@users.sf.net>
   7 * Copyright (C) 2004 Theodore Y. Ts'o <tytso@mit.edu>
   8 * Copyright (C) 2006 Mike McCormack
   9 *
  10 *  This program is free software; you can redistribute it and/or modify
  11 *  it under the terms of the GNU General Public License as published by
  12 *  the Free Software Foundation; either version 2 of the License, or
  13 *  (at your option) any later version.
  14 *
  15 *  This program is distributed in the hope that it will be useful,
  16 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 *  GNU General Public License for more details.
  19 *
  20 *  You should have received a copy of the GNU General Public License
  21 *  along with this program; if not, write to the Free Software
  22 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23 */
  24
  25#include "cache.h"
  26#include "credential.h"
  27#include "exec_cmd.h"
  28#include "run-command.h"
  29#include "parse-options.h"
  30#ifdef NO_OPENSSL
  31typedef void *SSL;
  32#endif
  33#ifdef USE_CURL_FOR_IMAP_SEND
  34#include "http.h"
  35#endif
  36
  37#if defined(USE_CURL_FOR_IMAP_SEND) && defined(NO_OPENSSL)
  38/* only available option */
  39#define USE_CURL_DEFAULT 1
  40#else
  41/* strictly opt in */
  42#define USE_CURL_DEFAULT 0
  43#endif
  44
  45static int verbosity;
  46static int use_curl = USE_CURL_DEFAULT;
  47
  48static const char * const imap_send_usage[] = { "git imap-send [-v] [-q] [--[no-]curl] < <mbox>", NULL };
  49
  50static struct option imap_send_options[] = {
  51        OPT__VERBOSITY(&verbosity),
  52        OPT_BOOL(0, "curl", &use_curl, "use libcurl to communicate with the IMAP server"),
  53        OPT_END()
  54};
  55
  56#undef DRV_OK
  57#define DRV_OK          0
  58#define DRV_MSG_BAD     -1
  59#define DRV_BOX_BAD     -2
  60#define DRV_STORE_BAD   -3
  61
  62__attribute__((format (printf, 1, 2)))
  63static void imap_info(const char *, ...);
  64__attribute__((format (printf, 1, 2)))
  65static void imap_warn(const char *, ...);
  66
  67static char *next_arg(char **);
  68
  69__attribute__((format (printf, 3, 4)))
  70static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
  71
  72static int nfvasprintf(char **strp, const char *fmt, va_list ap)
  73{
  74        int len;
  75        char tmp[8192];
  76
  77        len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
  78        if (len < 0)
  79                die("Fatal: Out of memory");
  80        if (len >= sizeof(tmp))
  81                die("imap command overflow!");
  82        *strp = xmemdupz(tmp, len);
  83        return len;
  84}
  85
  86struct imap_server_conf {
  87        char *name;
  88        char *tunnel;
  89        char *host;
  90        int port;
  91        char *folder;
  92        char *user;
  93        char *pass;
  94        int use_ssl;
  95        int ssl_verify;
  96        int use_html;
  97        char *auth_method;
  98};
  99
 100static struct imap_server_conf server = {
 101        NULL,   /* name */
 102        NULL,   /* tunnel */
 103        NULL,   /* host */
 104        0,      /* port */
 105        NULL,   /* folder */
 106        NULL,   /* user */
 107        NULL,   /* pass */
 108        0,      /* use_ssl */
 109        1,      /* ssl_verify */
 110        0,      /* use_html */
 111        NULL,   /* auth_method */
 112};
 113
 114struct imap_socket {
 115        int fd[2];
 116        SSL *ssl;
 117};
 118
 119struct imap_buffer {
 120        struct imap_socket sock;
 121        int bytes;
 122        int offset;
 123        char buf[1024];
 124};
 125
 126struct imap_cmd;
 127
 128struct imap {
 129        int uidnext; /* from SELECT responses */
 130        unsigned caps, rcaps; /* CAPABILITY results */
 131        /* command queue */
 132        int nexttag, num_in_progress, literal_pending;
 133        struct imap_cmd *in_progress, **in_progress_append;
 134        struct imap_buffer buf; /* this is BIG, so put it last */
 135};
 136
 137struct imap_store {
 138        /* currently open mailbox */
 139        const char *name; /* foreign! maybe preset? */
 140        int uidvalidity;
 141        struct imap *imap;
 142        const char *prefix;
 143};
 144
 145struct imap_cmd_cb {
 146        int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
 147        void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
 148        void *ctx;
 149        char *data;
 150        int dlen;
 151        int uid;
 152};
 153
 154struct imap_cmd {
 155        struct imap_cmd *next;
 156        struct imap_cmd_cb cb;
 157        char *cmd;
 158        int tag;
 159};
 160
 161#define CAP(cap) (imap->caps & (1 << (cap)))
 162
 163enum CAPABILITY {
 164        NOLOGIN = 0,
 165        UIDPLUS,
 166        LITERALPLUS,
 167        NAMESPACE,
 168        STARTTLS,
 169        AUTH_CRAM_MD5
 170};
 171
 172static const char *cap_list[] = {
 173        "LOGINDISABLED",
 174        "UIDPLUS",
 175        "LITERAL+",
 176        "NAMESPACE",
 177        "STARTTLS",
 178        "AUTH=CRAM-MD5",
 179};
 180
 181#define RESP_OK    0
 182#define RESP_NO    1
 183#define RESP_BAD   2
 184
 185static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
 186
 187
 188#ifndef NO_OPENSSL
 189static void ssl_socket_perror(const char *func)
 190{
 191        fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
 192}
 193#endif
 194
 195static void socket_perror(const char *func, struct imap_socket *sock, int ret)
 196{
 197#ifndef NO_OPENSSL
 198        if (sock->ssl) {
 199                int sslerr = SSL_get_error(sock->ssl, ret);
 200                switch (sslerr) {
 201                case SSL_ERROR_NONE:
 202                        break;
 203                case SSL_ERROR_SYSCALL:
 204                        perror("SSL_connect");
 205                        break;
 206                default:
 207                        ssl_socket_perror("SSL_connect");
 208                        break;
 209                }
 210        } else
 211#endif
 212        {
 213                if (ret < 0)
 214                        perror(func);
 215                else
 216                        fprintf(stderr, "%s: unexpected EOF\n", func);
 217        }
 218}
 219
 220#ifdef NO_OPENSSL
 221static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 222{
 223        fprintf(stderr, "SSL requested but SSL support not compiled in\n");
 224        return -1;
 225}
 226
 227#else
 228
 229static int host_matches(const char *host, const char *pattern)
 230{
 231        if (pattern[0] == '*' && pattern[1] == '.') {
 232                pattern += 2;
 233                if (!(host = strchr(host, '.')))
 234                        return 0;
 235                host++;
 236        }
 237
 238        return *host && *pattern && !strcasecmp(host, pattern);
 239}
 240
 241static int verify_hostname(X509 *cert, const char *hostname)
 242{
 243        int len;
 244        X509_NAME *subj;
 245        char cname[1000];
 246        int i, found;
 247        STACK_OF(GENERAL_NAME) *subj_alt_names;
 248
 249        /* try the DNS subjectAltNames */
 250        found = 0;
 251        if ((subj_alt_names = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL))) {
 252                int num_subj_alt_names = sk_GENERAL_NAME_num(subj_alt_names);
 253                for (i = 0; !found && i < num_subj_alt_names; i++) {
 254                        GENERAL_NAME *subj_alt_name = sk_GENERAL_NAME_value(subj_alt_names, i);
 255                        if (subj_alt_name->type == GEN_DNS &&
 256                            strlen((const char *)subj_alt_name->d.ia5->data) == (size_t)subj_alt_name->d.ia5->length &&
 257                            host_matches(hostname, (const char *)(subj_alt_name->d.ia5->data)))
 258                                found = 1;
 259                }
 260                sk_GENERAL_NAME_pop_free(subj_alt_names, GENERAL_NAME_free);
 261        }
 262        if (found)
 263                return 0;
 264
 265        /* try the common name */
 266        if (!(subj = X509_get_subject_name(cert)))
 267                return error("cannot get certificate subject");
 268        if ((len = X509_NAME_get_text_by_NID(subj, NID_commonName, cname, sizeof(cname))) < 0)
 269                return error("cannot get certificate common name");
 270        if (strlen(cname) == (size_t)len && host_matches(hostname, cname))
 271                return 0;
 272        return error("certificate owner '%s' does not match hostname '%s'",
 273                     cname, hostname);
 274}
 275
 276static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 277{
 278#if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
 279        const SSL_METHOD *meth;
 280#else
 281        SSL_METHOD *meth;
 282#endif
 283        SSL_CTX *ctx;
 284        int ret;
 285        X509 *cert;
 286
 287        SSL_library_init();
 288        SSL_load_error_strings();
 289
 290        if (use_tls_only)
 291                meth = TLSv1_method();
 292        else
 293                meth = SSLv23_method();
 294
 295        if (!meth) {
 296                ssl_socket_perror("SSLv23_method");
 297                return -1;
 298        }
 299
 300        ctx = SSL_CTX_new(meth);
 301
 302        if (verify)
 303                SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
 304
 305        if (!SSL_CTX_set_default_verify_paths(ctx)) {
 306                ssl_socket_perror("SSL_CTX_set_default_verify_paths");
 307                return -1;
 308        }
 309        sock->ssl = SSL_new(ctx);
 310        if (!sock->ssl) {
 311                ssl_socket_perror("SSL_new");
 312                return -1;
 313        }
 314        if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
 315                ssl_socket_perror("SSL_set_rfd");
 316                return -1;
 317        }
 318        if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
 319                ssl_socket_perror("SSL_set_wfd");
 320                return -1;
 321        }
 322
 323#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
 324        /*
 325         * SNI (RFC4366)
 326         * OpenSSL does not document this function, but the implementation
 327         * returns 1 on success, 0 on failure after calling SSLerr().
 328         */
 329        ret = SSL_set_tlsext_host_name(sock->ssl, server.host);
 330        if (ret != 1)
 331                warning("SSL_set_tlsext_host_name(%s) failed.", server.host);
 332#endif
 333
 334        ret = SSL_connect(sock->ssl);
 335        if (ret <= 0) {
 336                socket_perror("SSL_connect", sock, ret);
 337                return -1;
 338        }
 339
 340        if (verify) {
 341                /* make sure the hostname matches that of the certificate */
 342                cert = SSL_get_peer_certificate(sock->ssl);
 343                if (!cert)
 344                        return error("unable to get peer certificate.");
 345                if (verify_hostname(cert, server.host) < 0)
 346                        return -1;
 347        }
 348
 349        return 0;
 350}
 351#endif
 352
 353static int socket_read(struct imap_socket *sock, char *buf, int len)
 354{
 355        ssize_t n;
 356#ifndef NO_OPENSSL
 357        if (sock->ssl)
 358                n = SSL_read(sock->ssl, buf, len);
 359        else
 360#endif
 361                n = xread(sock->fd[0], buf, len);
 362        if (n <= 0) {
 363                socket_perror("read", sock, n);
 364                close(sock->fd[0]);
 365                close(sock->fd[1]);
 366                sock->fd[0] = sock->fd[1] = -1;
 367        }
 368        return n;
 369}
 370
 371static int socket_write(struct imap_socket *sock, const char *buf, int len)
 372{
 373        int n;
 374#ifndef NO_OPENSSL
 375        if (sock->ssl)
 376                n = SSL_write(sock->ssl, buf, len);
 377        else
 378#endif
 379                n = write_in_full(sock->fd[1], buf, len);
 380        if (n != len) {
 381                socket_perror("write", sock, n);
 382                close(sock->fd[0]);
 383                close(sock->fd[1]);
 384                sock->fd[0] = sock->fd[1] = -1;
 385        }
 386        return n;
 387}
 388
 389static void socket_shutdown(struct imap_socket *sock)
 390{
 391#ifndef NO_OPENSSL
 392        if (sock->ssl) {
 393                SSL_shutdown(sock->ssl);
 394                SSL_free(sock->ssl);
 395        }
 396#endif
 397        close(sock->fd[0]);
 398        close(sock->fd[1]);
 399}
 400
 401/* simple line buffering */
 402static int buffer_gets(struct imap_buffer *b, char **s)
 403{
 404        int n;
 405        int start = b->offset;
 406
 407        *s = b->buf + start;
 408
 409        for (;;) {
 410                /* make sure we have enough data to read the \r\n sequence */
 411                if (b->offset + 1 >= b->bytes) {
 412                        if (start) {
 413                                /* shift down used bytes */
 414                                *s = b->buf;
 415
 416                                assert(start <= b->bytes);
 417                                n = b->bytes - start;
 418
 419                                if (n)
 420                                        memmove(b->buf, b->buf + start, n);
 421                                b->offset -= start;
 422                                b->bytes = n;
 423                                start = 0;
 424                        }
 425
 426                        n = socket_read(&b->sock, b->buf + b->bytes,
 427                                         sizeof(b->buf) - b->bytes);
 428
 429                        if (n <= 0)
 430                                return -1;
 431
 432                        b->bytes += n;
 433                }
 434
 435                if (b->buf[b->offset] == '\r') {
 436                        assert(b->offset + 1 < b->bytes);
 437                        if (b->buf[b->offset + 1] == '\n') {
 438                                b->buf[b->offset] = 0;  /* terminate the string */
 439                                b->offset += 2; /* next line */
 440                                if (0 < verbosity)
 441                                        puts(*s);
 442                                return 0;
 443                        }
 444                }
 445
 446                b->offset++;
 447        }
 448        /* not reached */
 449}
 450
 451static void imap_info(const char *msg, ...)
 452{
 453        va_list va;
 454
 455        if (0 <= verbosity) {
 456                va_start(va, msg);
 457                vprintf(msg, va);
 458                va_end(va);
 459                fflush(stdout);
 460        }
 461}
 462
 463static void imap_warn(const char *msg, ...)
 464{
 465        va_list va;
 466
 467        if (-2 < verbosity) {
 468                va_start(va, msg);
 469                vfprintf(stderr, msg, va);
 470                va_end(va);
 471        }
 472}
 473
 474static char *next_arg(char **s)
 475{
 476        char *ret;
 477
 478        if (!s || !*s)
 479                return NULL;
 480        while (isspace((unsigned char) **s))
 481                (*s)++;
 482        if (!**s) {
 483                *s = NULL;
 484                return NULL;
 485        }
 486        if (**s == '"') {
 487                ++*s;
 488                ret = *s;
 489                *s = strchr(*s, '"');
 490        } else {
 491                ret = *s;
 492                while (**s && !isspace((unsigned char) **s))
 493                        (*s)++;
 494        }
 495        if (*s) {
 496                if (**s)
 497                        *(*s)++ = 0;
 498                if (!**s)
 499                        *s = NULL;
 500        }
 501        return ret;
 502}
 503
 504static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
 505{
 506        int ret;
 507        va_list va;
 508
 509        va_start(va, fmt);
 510        if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
 511                die("Fatal: buffer too small. Please report a bug.");
 512        va_end(va);
 513        return ret;
 514}
 515
 516static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
 517                                       struct imap_cmd_cb *cb,
 518                                       const char *fmt, va_list ap)
 519{
 520        struct imap *imap = ctx->imap;
 521        struct imap_cmd *cmd;
 522        int n, bufl;
 523        char buf[1024];
 524
 525        cmd = xmalloc(sizeof(struct imap_cmd));
 526        nfvasprintf(&cmd->cmd, fmt, ap);
 527        cmd->tag = ++imap->nexttag;
 528
 529        if (cb)
 530                cmd->cb = *cb;
 531        else
 532                memset(&cmd->cb, 0, sizeof(cmd->cb));
 533
 534        while (imap->literal_pending)
 535                get_cmd_result(ctx, NULL);
 536
 537        if (!cmd->cb.data)
 538                bufl = nfsnprintf(buf, sizeof(buf), "%d %s\r\n", cmd->tag, cmd->cmd);
 539        else
 540                bufl = nfsnprintf(buf, sizeof(buf), "%d %s{%d%s}\r\n",
 541                                  cmd->tag, cmd->cmd, cmd->cb.dlen,
 542                                  CAP(LITERALPLUS) ? "+" : "");
 543
 544        if (0 < verbosity) {
 545                if (imap->num_in_progress)
 546                        printf("(%d in progress) ", imap->num_in_progress);
 547                if (!starts_with(cmd->cmd, "LOGIN"))
 548                        printf(">>> %s", buf);
 549                else
 550                        printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
 551        }
 552        if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
 553                free(cmd->cmd);
 554                free(cmd);
 555                if (cb)
 556                        free(cb->data);
 557                return NULL;
 558        }
 559        if (cmd->cb.data) {
 560                if (CAP(LITERALPLUS)) {
 561                        n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
 562                        free(cmd->cb.data);
 563                        if (n != cmd->cb.dlen ||
 564                            socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
 565                                free(cmd->cmd);
 566                                free(cmd);
 567                                return NULL;
 568                        }
 569                        cmd->cb.data = NULL;
 570                } else
 571                        imap->literal_pending = 1;
 572        } else if (cmd->cb.cont)
 573                imap->literal_pending = 1;
 574        cmd->next = NULL;
 575        *imap->in_progress_append = cmd;
 576        imap->in_progress_append = &cmd->next;
 577        imap->num_in_progress++;
 578        return cmd;
 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 = 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 = 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 skip_imap_list_l(char **sp, int level)
 618{
 619        char *s = *sp;
 620
 621        for (;;) {
 622                while (isspace((unsigned char)*s))
 623                        s++;
 624                if (level && *s == ')') {
 625                        s++;
 626                        break;
 627                }
 628                if (*s == '(') {
 629                        /* sublist */
 630                        s++;
 631                        if (skip_imap_list_l(&s, level + 1))
 632                                goto bail;
 633                } else if (*s == '"') {
 634                        /* quoted string */
 635                        s++;
 636                        for (; *s != '"'; s++)
 637                                if (!*s)
 638                                        goto bail;
 639                        s++;
 640                } else {
 641                        /* atom */
 642                        for (; *s && !isspace((unsigned char)*s); s++)
 643                                if (level && *s == ')')
 644                                        break;
 645                }
 646
 647                if (!level)
 648                        break;
 649                if (!*s)
 650                        goto bail;
 651        }
 652        *sp = s;
 653        return 0;
 654
 655bail:
 656        return -1;
 657}
 658
 659static void skip_list(char **sp)
 660{
 661        skip_imap_list_l(sp, 0);
 662}
 663
 664static void parse_capability(struct imap *imap, char *cmd)
 665{
 666        char *arg;
 667        unsigned i;
 668
 669        imap->caps = 0x80000000;
 670        while ((arg = next_arg(&cmd)))
 671                for (i = 0; i < ARRAY_SIZE(cap_list); i++)
 672                        if (!strcmp(cap_list[i], arg))
 673                                imap->caps |= 1 << i;
 674        imap->rcaps = imap->caps;
 675}
 676
 677static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
 678                               char *s)
 679{
 680        struct imap *imap = ctx->imap;
 681        char *arg, *p;
 682
 683        if (*s != '[')
 684                return RESP_OK;         /* no response code */
 685        s++;
 686        if (!(p = strchr(s, ']'))) {
 687                fprintf(stderr, "IMAP error: malformed response code\n");
 688                return RESP_BAD;
 689        }
 690        *p++ = 0;
 691        arg = next_arg(&s);
 692        if (!strcmp("UIDVALIDITY", arg)) {
 693                if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg))) {
 694                        fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
 695                        return RESP_BAD;
 696                }
 697        } else if (!strcmp("UIDNEXT", arg)) {
 698                if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
 699                        fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
 700                        return RESP_BAD;
 701                }
 702        } else if (!strcmp("CAPABILITY", arg)) {
 703                parse_capability(imap, s);
 704        } else if (!strcmp("ALERT", arg)) {
 705                /* RFC2060 says that these messages MUST be displayed
 706                 * to the user
 707                 */
 708                for (; isspace((unsigned char)*p); p++);
 709                fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
 710        } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
 711                if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg)) ||
 712                    !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
 713                        fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
 714                        return RESP_BAD;
 715                }
 716        }
 717        return RESP_OK;
 718}
 719
 720static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
 721{
 722        struct imap *imap = ctx->imap;
 723        struct imap_cmd *cmdp, **pcmdp;
 724        char *cmd, *arg, *arg1;
 725        int n, resp, resp2, tag;
 726
 727        for (;;) {
 728                if (buffer_gets(&imap->buf, &cmd))
 729                        return RESP_BAD;
 730
 731                arg = next_arg(&cmd);
 732                if (*arg == '*') {
 733                        arg = next_arg(&cmd);
 734                        if (!arg) {
 735                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 736                                return RESP_BAD;
 737                        }
 738
 739                        if (!strcmp("NAMESPACE", arg)) {
 740                                /* rfc2342 NAMESPACE response. */
 741                                skip_list(&cmd); /* Personal mailboxes */
 742                                skip_list(&cmd); /* Others' mailboxes */
 743                                skip_list(&cmd); /* Shared mailboxes */
 744                        } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
 745                                   !strcmp("NO", arg) || !strcmp("BYE", arg)) {
 746                                if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
 747                                        return resp;
 748                        } else if (!strcmp("CAPABILITY", arg)) {
 749                                parse_capability(imap, cmd);
 750                        } else if ((arg1 = next_arg(&cmd))) {
 751                                ; /*
 752                                   * Unhandled response-data with at least two words.
 753                                   * Ignore it.
 754                                   *
 755                                   * NEEDSWORK: Previously this case handled '<num> EXISTS'
 756                                   * and '<num> RECENT' but as a probably-unintended side
 757                                   * effect it ignores other unrecognized two-word
 758                                   * responses.  imap-send doesn't ever try to read
 759                                   * messages or mailboxes these days, so consider
 760                                   * eliminating this case.
 761                                   */
 762                        } else {
 763                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 764                                return RESP_BAD;
 765                        }
 766                } else if (!imap->in_progress) {
 767                        fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
 768                        return RESP_BAD;
 769                } else if (*arg == '+') {
 770                        /* This can happen only with the last command underway, as
 771                           it enforces a round-trip. */
 772                        cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
 773                               offsetof(struct imap_cmd, next));
 774                        if (cmdp->cb.data) {
 775                                n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
 776                                free(cmdp->cb.data);
 777                                cmdp->cb.data = NULL;
 778                                if (n != (int)cmdp->cb.dlen)
 779                                        return RESP_BAD;
 780                        } else if (cmdp->cb.cont) {
 781                                if (cmdp->cb.cont(ctx, cmdp, cmd))
 782                                        return RESP_BAD;
 783                        } else {
 784                                fprintf(stderr, "IMAP error: unexpected command continuation request\n");
 785                                return RESP_BAD;
 786                        }
 787                        if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
 788                                return RESP_BAD;
 789                        if (!cmdp->cb.cont)
 790                                imap->literal_pending = 0;
 791                        if (!tcmd)
 792                                return DRV_OK;
 793                } else {
 794                        tag = atoi(arg);
 795                        for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
 796                                if (cmdp->tag == tag)
 797                                        goto gottag;
 798                        fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
 799                        return RESP_BAD;
 800                gottag:
 801                        if (!(*pcmdp = cmdp->next))
 802                                imap->in_progress_append = pcmdp;
 803                        imap->num_in_progress--;
 804                        if (cmdp->cb.cont || cmdp->cb.data)
 805                                imap->literal_pending = 0;
 806                        arg = next_arg(&cmd);
 807                        if (!strcmp("OK", arg))
 808                                resp = DRV_OK;
 809                        else {
 810                                if (!strcmp("NO", arg))
 811                                        resp = RESP_NO;
 812                                else /*if (!strcmp("BAD", arg))*/
 813                                        resp = RESP_BAD;
 814                                fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
 815                                        !starts_with(cmdp->cmd, "LOGIN") ?
 816                                                        cmdp->cmd : "LOGIN <user> <pass>",
 817                                                        arg, cmd ? cmd : "");
 818                        }
 819                        if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
 820                                resp = resp2;
 821                        if (cmdp->cb.done)
 822                                cmdp->cb.done(ctx, cmdp, resp);
 823                        free(cmdp->cb.data);
 824                        free(cmdp->cmd);
 825                        free(cmdp);
 826                        if (!tcmd || tcmd == cmdp)
 827                                return resp;
 828                }
 829        }
 830        /* not reached */
 831}
 832
 833static void imap_close_server(struct imap_store *ictx)
 834{
 835        struct imap *imap = ictx->imap;
 836
 837        if (imap->buf.sock.fd[0] != -1) {
 838                imap_exec(ictx, NULL, "LOGOUT");
 839                socket_shutdown(&imap->buf.sock);
 840        }
 841        free(imap);
 842}
 843
 844static void imap_close_store(struct imap_store *ctx)
 845{
 846        imap_close_server(ctx);
 847        free(ctx);
 848}
 849
 850#ifndef NO_OPENSSL
 851
 852/*
 853 * hexchar() and cram() functions are based on the code from the isync
 854 * project (http://isync.sf.net/).
 855 */
 856static char hexchar(unsigned int b)
 857{
 858        return b < 10 ? '0' + b : 'a' + (b - 10);
 859}
 860
 861#define ENCODED_SIZE(n) (4*((n+2)/3))
 862static char *cram(const char *challenge_64, const char *user, const char *pass)
 863{
 864        int i, resp_len, encoded_len, decoded_len;
 865        HMAC_CTX hmac;
 866        unsigned char hash[16];
 867        char hex[33];
 868        char *response, *response_64, *challenge;
 869
 870        /*
 871         * length of challenge_64 (i.e. base-64 encoded string) is a good
 872         * enough upper bound for challenge (decoded result).
 873         */
 874        encoded_len = strlen(challenge_64);
 875        challenge = xmalloc(encoded_len);
 876        decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
 877                                      (unsigned char *)challenge_64, encoded_len);
 878        if (decoded_len < 0)
 879                die("invalid challenge %s", challenge_64);
 880        HMAC_Init(&hmac, (unsigned char *)pass, strlen(pass), EVP_md5());
 881        HMAC_Update(&hmac, (unsigned char *)challenge, decoded_len);
 882        HMAC_Final(&hmac, hash, NULL);
 883        HMAC_CTX_cleanup(&hmac);
 884
 885        hex[32] = 0;
 886        for (i = 0; i < 16; i++) {
 887                hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
 888                hex[2 * i + 1] = hexchar(hash[i] & 0xf);
 889        }
 890
 891        /* response: "<user> <digest in hex>" */
 892        response = xstrfmt("%s %s", user, hex);
 893        resp_len = strlen(response) + 1;
 894
 895        response_64 = xmalloc(ENCODED_SIZE(resp_len) + 1);
 896        encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
 897                                      (unsigned char *)response, resp_len);
 898        if (encoded_len < 0)
 899                die("EVP_EncodeBlock error");
 900        response_64[encoded_len] = '\0';
 901        return (char *)response_64;
 902}
 903
 904#else
 905
 906static char *cram(const char *challenge_64, const char *user, const char *pass)
 907{
 908        die("If you want to use CRAM-MD5 authenticate method, "
 909            "you have to build git-imap-send with OpenSSL library.");
 910}
 911
 912#endif
 913
 914static int auth_cram_md5(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt)
 915{
 916        int ret;
 917        char *response;
 918
 919        response = cram(prompt, server.user, server.pass);
 920
 921        ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
 922        if (ret != strlen(response))
 923                return error("IMAP error: sending response failed");
 924
 925        free(response);
 926
 927        return 0;
 928}
 929
 930static struct imap_store *imap_open_store(struct imap_server_conf *srvc, char *folder)
 931{
 932        struct credential cred = CREDENTIAL_INIT;
 933        struct imap_store *ctx;
 934        struct imap *imap;
 935        char *arg, *rsp;
 936        int s = -1, preauth;
 937
 938        ctx = xcalloc(1, sizeof(*ctx));
 939
 940        ctx->imap = imap = xcalloc(1, sizeof(*imap));
 941        imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
 942        imap->in_progress_append = &imap->in_progress;
 943
 944        /* open connection to IMAP server */
 945
 946        if (srvc->tunnel) {
 947                struct child_process tunnel = CHILD_PROCESS_INIT;
 948
 949                imap_info("Starting tunnel '%s'... ", srvc->tunnel);
 950
 951                argv_array_push(&tunnel.args, srvc->tunnel);
 952                tunnel.use_shell = 1;
 953                tunnel.in = -1;
 954                tunnel.out = -1;
 955                if (start_command(&tunnel))
 956                        die("cannot start proxy %s", srvc->tunnel);
 957
 958                imap->buf.sock.fd[0] = tunnel.out;
 959                imap->buf.sock.fd[1] = tunnel.in;
 960
 961                imap_info("ok\n");
 962        } else {
 963#ifndef NO_IPV6
 964                struct addrinfo hints, *ai0, *ai;
 965                int gai;
 966                char portstr[6];
 967
 968                snprintf(portstr, sizeof(portstr), "%d", srvc->port);
 969
 970                memset(&hints, 0, sizeof(hints));
 971                hints.ai_socktype = SOCK_STREAM;
 972                hints.ai_protocol = IPPROTO_TCP;
 973
 974                imap_info("Resolving %s... ", srvc->host);
 975                gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
 976                if (gai) {
 977                        fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
 978                        goto bail;
 979                }
 980                imap_info("ok\n");
 981
 982                for (ai0 = ai; ai; ai = ai->ai_next) {
 983                        char addr[NI_MAXHOST];
 984
 985                        s = socket(ai->ai_family, ai->ai_socktype,
 986                                   ai->ai_protocol);
 987                        if (s < 0)
 988                                continue;
 989
 990                        getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
 991                                    sizeof(addr), NULL, 0, NI_NUMERICHOST);
 992                        imap_info("Connecting to [%s]:%s... ", addr, portstr);
 993
 994                        if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
 995                                close(s);
 996                                s = -1;
 997                                perror("connect");
 998                                continue;
 999                        }
1000
1001                        break;
1002                }
1003                freeaddrinfo(ai0);
1004#else /* NO_IPV6 */
1005                struct hostent *he;
1006                struct sockaddr_in addr;
1007
1008                memset(&addr, 0, sizeof(addr));
1009                addr.sin_port = htons(srvc->port);
1010                addr.sin_family = AF_INET;
1011
1012                imap_info("Resolving %s... ", srvc->host);
1013                he = gethostbyname(srvc->host);
1014                if (!he) {
1015                        perror("gethostbyname");
1016                        goto bail;
1017                }
1018                imap_info("ok\n");
1019
1020                addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1021
1022                s = socket(PF_INET, SOCK_STREAM, 0);
1023
1024                imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1025                if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1026                        close(s);
1027                        s = -1;
1028                        perror("connect");
1029                }
1030#endif
1031                if (s < 0) {
1032                        fputs("Error: unable to connect to server.\n", stderr);
1033                        goto bail;
1034                }
1035
1036                imap->buf.sock.fd[0] = s;
1037                imap->buf.sock.fd[1] = dup(s);
1038
1039                if (srvc->use_ssl &&
1040                    ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1041                        close(s);
1042                        goto bail;
1043                }
1044                imap_info("ok\n");
1045        }
1046
1047        /* read the greeting string */
1048        if (buffer_gets(&imap->buf, &rsp)) {
1049                fprintf(stderr, "IMAP error: no greeting response\n");
1050                goto bail;
1051        }
1052        arg = next_arg(&rsp);
1053        if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1054                fprintf(stderr, "IMAP error: invalid greeting response\n");
1055                goto bail;
1056        }
1057        preauth = 0;
1058        if (!strcmp("PREAUTH", arg))
1059                preauth = 1;
1060        else if (strcmp("OK", arg) != 0) {
1061                fprintf(stderr, "IMAP error: unknown greeting response\n");
1062                goto bail;
1063        }
1064        parse_response_code(ctx, NULL, rsp);
1065        if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1066                goto bail;
1067
1068        if (!preauth) {
1069#ifndef NO_OPENSSL
1070                if (!srvc->use_ssl && CAP(STARTTLS)) {
1071                        if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK)
1072                                goto bail;
1073                        if (ssl_socket_connect(&imap->buf.sock, 1,
1074                                               srvc->ssl_verify))
1075                                goto bail;
1076                        /* capabilities may have changed, so get the new capabilities */
1077                        if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1078                                goto bail;
1079                }
1080#endif
1081                imap_info("Logging in...\n");
1082                if (!srvc->user || !srvc->pass) {
1083                        cred.protocol = xstrdup(srvc->use_ssl ? "imaps" : "imap");
1084                        cred.host = xstrdup(srvc->host);
1085
1086                        if (srvc->user)
1087                                cred.username = xstrdup(srvc->user);
1088                        if (srvc->pass)
1089                                cred.password = xstrdup(srvc->pass);
1090
1091                        credential_fill(&cred);
1092
1093                        if (!srvc->user)
1094                                srvc->user = xstrdup(cred.username);
1095                        if (!srvc->pass)
1096                                srvc->pass = xstrdup(cred.password);
1097                }
1098
1099                if (CAP(NOLOGIN)) {
1100                        fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1101                        goto bail;
1102                }
1103
1104                if (srvc->auth_method) {
1105                        struct imap_cmd_cb cb;
1106
1107                        if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1108                                if (!CAP(AUTH_CRAM_MD5)) {
1109                                        fprintf(stderr, "You specified"
1110                                                "CRAM-MD5 as authentication method, "
1111                                                "but %s doesn't support it.\n", srvc->host);
1112                                        goto bail;
1113                                }
1114                                /* CRAM-MD5 */
1115
1116                                memset(&cb, 0, sizeof(cb));
1117                                cb.cont = auth_cram_md5;
1118                                if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1119                                        fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1120                                        goto bail;
1121                                }
1122                        } else {
1123                                fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1124                                goto bail;
1125                        }
1126                } else {
1127                        if (!imap->buf.sock.ssl)
1128                                imap_warn("*** IMAP Warning *** Password is being "
1129                                          "sent in the clear\n");
1130                        if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1131                                fprintf(stderr, "IMAP error: LOGIN failed\n");
1132                                goto bail;
1133                        }
1134                }
1135        } /* !preauth */
1136
1137        if (cred.username)
1138                credential_approve(&cred);
1139        credential_clear(&cred);
1140
1141        /* check the target mailbox exists */
1142        ctx->name = folder;
1143        switch (imap_exec(ctx, NULL, "EXAMINE \"%s\"", ctx->name)) {
1144        case RESP_OK:
1145                /* ok */
1146                break;
1147        case RESP_BAD:
1148                fprintf(stderr, "IMAP error: could not check mailbox\n");
1149                goto out;
1150        case RESP_NO:
1151                if (imap_exec(ctx, NULL, "CREATE \"%s\"", ctx->name) == RESP_OK) {
1152                        imap_info("Created missing mailbox\n");
1153                } else {
1154                        fprintf(stderr, "IMAP error: could not create missing mailbox\n");
1155                        goto out;
1156                }
1157                break;
1158        }
1159
1160        ctx->prefix = "";
1161        return ctx;
1162
1163bail:
1164        if (cred.username)
1165                credential_reject(&cred);
1166        credential_clear(&cred);
1167
1168 out:
1169        imap_close_store(ctx);
1170        return NULL;
1171}
1172
1173/*
1174 * Insert CR characters as necessary in *msg to ensure that every LF
1175 * character in *msg is preceded by a CR.
1176 */
1177static void lf_to_crlf(struct strbuf *msg)
1178{
1179        char *new;
1180        size_t i, j;
1181        char lastc;
1182
1183        /* First pass: tally, in j, the size of the new string: */
1184        for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1185                if (msg->buf[i] == '\n' && lastc != '\r')
1186                        j++; /* a CR will need to be added here */
1187                lastc = msg->buf[i];
1188                j++;
1189        }
1190
1191        new = xmalloc(j + 1);
1192
1193        /*
1194         * Second pass: write the new string.  Note that this loop is
1195         * otherwise identical to the first pass.
1196         */
1197        for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1198                if (msg->buf[i] == '\n' && lastc != '\r')
1199                        new[j++] = '\r';
1200                lastc = new[j++] = msg->buf[i];
1201        }
1202        strbuf_attach(msg, new, j, j + 1);
1203}
1204
1205/*
1206 * Store msg to IMAP.  Also detach and free the data from msg->data,
1207 * leaving msg->data empty.
1208 */
1209static int imap_store_msg(struct imap_store *ctx, struct strbuf *msg)
1210{
1211        struct imap *imap = ctx->imap;
1212        struct imap_cmd_cb cb;
1213        const char *prefix, *box;
1214        int ret;
1215
1216        lf_to_crlf(msg);
1217        memset(&cb, 0, sizeof(cb));
1218
1219        cb.dlen = msg->len;
1220        cb.data = strbuf_detach(msg, NULL);
1221
1222        box = ctx->name;
1223        prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1224        ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" ", prefix, box);
1225        imap->caps = imap->rcaps;
1226        if (ret != DRV_OK)
1227                return ret;
1228
1229        return DRV_OK;
1230}
1231
1232static void wrap_in_html(struct strbuf *msg)
1233{
1234        struct strbuf buf = STRBUF_INIT;
1235        static char *content_type = "Content-Type: text/html;\n";
1236        static char *pre_open = "<pre>\n";
1237        static char *pre_close = "</pre>\n";
1238        const char *body = strstr(msg->buf, "\n\n");
1239
1240        if (!body)
1241                return; /* Headers but no body; no wrapping needed */
1242
1243        body += 2;
1244
1245        strbuf_add(&buf, msg->buf, body - msg->buf - 1);
1246        strbuf_addstr(&buf, content_type);
1247        strbuf_addch(&buf, '\n');
1248        strbuf_addstr(&buf, pre_open);
1249        strbuf_addstr_xml_quoted(&buf, body);
1250        strbuf_addstr(&buf, pre_close);
1251
1252        strbuf_release(msg);
1253        *msg = buf;
1254}
1255
1256#define CHUNKSIZE 0x1000
1257
1258static int read_message(FILE *f, struct strbuf *all_msgs)
1259{
1260        do {
1261                if (strbuf_fread(all_msgs, CHUNKSIZE, f) <= 0)
1262                        break;
1263        } while (!feof(f));
1264
1265        return ferror(f) ? -1 : 0;
1266}
1267
1268static int count_messages(struct strbuf *all_msgs)
1269{
1270        int count = 0;
1271        char *p = all_msgs->buf;
1272
1273        while (1) {
1274                if (starts_with(p, "From ")) {
1275                        p = strstr(p+5, "\nFrom: ");
1276                        if (!p) break;
1277                        p = strstr(p+7, "\nDate: ");
1278                        if (!p) break;
1279                        p = strstr(p+7, "\nSubject: ");
1280                        if (!p) break;
1281                        p += 10;
1282                        count++;
1283                }
1284                p = strstr(p+5, "\nFrom ");
1285                if (!p)
1286                        break;
1287                p++;
1288        }
1289        return count;
1290}
1291
1292/*
1293 * Copy the next message from all_msgs, starting at offset *ofs, to
1294 * msg.  Update *ofs to the start of the following message.  Return
1295 * true iff a message was successfully copied.
1296 */
1297static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs)
1298{
1299        char *p, *data;
1300        size_t len;
1301
1302        if (*ofs >= all_msgs->len)
1303                return 0;
1304
1305        data = &all_msgs->buf[*ofs];
1306        len = all_msgs->len - *ofs;
1307
1308        if (len < 5 || !starts_with(data, "From "))
1309                return 0;
1310
1311        p = strchr(data, '\n');
1312        if (p) {
1313                p++;
1314                len -= p - data;
1315                *ofs += p - data;
1316                data = p;
1317        }
1318
1319        p = strstr(data, "\nFrom ");
1320        if (p)
1321                len = &p[1] - data;
1322
1323        strbuf_add(msg, data, len);
1324        *ofs += len;
1325        return 1;
1326}
1327
1328static void git_imap_config(void)
1329{
1330        const char *val = NULL;
1331
1332        git_config_get_bool("imap.sslverify", &server.ssl_verify);
1333        git_config_get_bool("imap.preformattedhtml", &server.use_html);
1334        git_config_get_string("imap.folder", &server.folder);
1335
1336        if (!git_config_get_value("imap.host", &val)) {
1337                if (!val) {
1338                        git_die_config("imap.host", "Missing value for 'imap.host'");
1339                } else {
1340                        if (starts_with(val, "imap:"))
1341                                val += 5;
1342                        else if (starts_with(val, "imaps:")) {
1343                                val += 6;
1344                                server.use_ssl = 1;
1345                        }
1346                        if (starts_with(val, "//"))
1347                                val += 2;
1348                        server.host = xstrdup(val);
1349                }
1350        }
1351
1352        git_config_get_string("imap.user", &server.user);
1353        git_config_get_string("imap.pass", &server.pass);
1354        git_config_get_int("imap.port", &server.port);
1355        git_config_get_string("imap.tunnel", &server.tunnel);
1356        git_config_get_string("imap.authmethod", &server.auth_method);
1357}
1358
1359static int append_msgs_to_imap(struct imap_server_conf *server,
1360                               struct strbuf* all_msgs, int total)
1361{
1362        struct strbuf msg = STRBUF_INIT;
1363        struct imap_store *ctx = NULL;
1364        int ofs = 0;
1365        int r;
1366        int n = 0;
1367
1368        ctx = imap_open_store(server, server->folder);
1369        if (!ctx) {
1370                fprintf(stderr, "failed to open store\n");
1371                return 1;
1372        }
1373        ctx->name = server->folder;
1374
1375        fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1376        while (1) {
1377                unsigned percent = n * 100 / total;
1378
1379                fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1380
1381                if (!split_msg(all_msgs, &msg, &ofs))
1382                        break;
1383                if (server->use_html)
1384                        wrap_in_html(&msg);
1385                r = imap_store_msg(ctx, &msg);
1386                if (r != DRV_OK)
1387                        break;
1388                n++;
1389        }
1390        fprintf(stderr, "\n");
1391
1392        imap_close_store(ctx);
1393
1394        return 0;
1395}
1396
1397#ifdef USE_CURL_FOR_IMAP_SEND
1398static CURL *setup_curl(struct imap_server_conf *srvc)
1399{
1400        CURL *curl;
1401        struct strbuf path = STRBUF_INIT;
1402
1403        if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
1404                die("curl_global_init failed");
1405
1406        curl = curl_easy_init();
1407
1408        if (!curl)
1409                die("curl_easy_init failed");
1410
1411        curl_easy_setopt(curl, CURLOPT_USERNAME, server.user);
1412        curl_easy_setopt(curl, CURLOPT_PASSWORD, server.pass);
1413
1414        strbuf_addstr(&path, server.host);
1415        if (!path.len || path.buf[path.len - 1] != '/')
1416                strbuf_addch(&path, '/');
1417        strbuf_addstr(&path, server.folder);
1418
1419        curl_easy_setopt(curl, CURLOPT_URL, path.buf);
1420        strbuf_release(&path);
1421        curl_easy_setopt(curl, CURLOPT_PORT, server.port);
1422
1423        if (server.auth_method) {
1424#if LIBCURL_VERSION_NUM < 0x072200
1425                warning("No LOGIN_OPTIONS support in this cURL version");
1426#else
1427                struct strbuf auth = STRBUF_INIT;
1428                strbuf_addstr(&auth, "AUTH=");
1429                strbuf_addstr(&auth, server.auth_method);
1430                curl_easy_setopt(curl, CURLOPT_LOGIN_OPTIONS, auth.buf);
1431                strbuf_release(&auth);
1432#endif
1433        }
1434
1435        if (!server.use_ssl)
1436                curl_easy_setopt(curl, CURLOPT_USE_SSL, (long)CURLUSESSL_TRY);
1437
1438        curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, server.ssl_verify);
1439        curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, server.ssl_verify);
1440
1441        curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
1442
1443        curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
1444
1445        if (0 < verbosity || getenv("GIT_CURL_VERBOSE"))
1446                curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
1447
1448        return curl;
1449}
1450
1451static int curl_append_msgs_to_imap(struct imap_server_conf *server,
1452                                    struct strbuf* all_msgs, int total) {
1453        int ofs = 0;
1454        int n = 0;
1455        struct buffer msgbuf = { STRBUF_INIT, 0 };
1456        CURL *curl;
1457        CURLcode res = CURLE_OK;
1458
1459        curl = setup_curl(server);
1460        curl_easy_setopt(curl, CURLOPT_READDATA, &msgbuf);
1461
1462        fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1463        while (1) {
1464                unsigned percent = n * 100 / total;
1465                int prev_len;
1466
1467                fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1468
1469                prev_len = msgbuf.buf.len;
1470                if (!split_msg(all_msgs, &msgbuf.buf, &ofs))
1471                        break;
1472                if (server->use_html)
1473                        wrap_in_html(&msgbuf.buf);
1474                lf_to_crlf(&msgbuf.buf);
1475
1476                curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE,
1477                                 (curl_off_t)(msgbuf.buf.len-prev_len));
1478
1479                res = curl_easy_perform(curl);
1480
1481                if(res != CURLE_OK) {
1482                        fprintf(stderr, "curl_easy_perform() failed: %s\n",
1483                                        curl_easy_strerror(res));
1484                        break;
1485                }
1486
1487                n++;
1488        }
1489        fprintf(stderr, "\n");
1490
1491        curl_easy_cleanup(curl);
1492        curl_global_cleanup();
1493
1494        return 0;
1495}
1496#endif
1497
1498int main(int argc, char **argv)
1499{
1500        struct strbuf all_msgs = STRBUF_INIT;
1501        int total;
1502        int nongit_ok;
1503
1504        git_extract_argv0_path(argv[0]);
1505
1506        git_setup_gettext();
1507
1508        setup_git_directory_gently(&nongit_ok);
1509        git_imap_config();
1510
1511        argc = parse_options(argc, (const char **)argv, "", imap_send_options, imap_send_usage, 0);
1512
1513        if (argc)
1514                usage_with_options(imap_send_usage, imap_send_options);
1515
1516#ifndef USE_CURL_FOR_IMAP_SEND
1517        if (use_curl) {
1518                warning("--curl not supported in this build");
1519                use_curl = 0;
1520        }
1521#elif defined(NO_OPENSSL)
1522        if (!use_curl) {
1523                warning("--no-curl not supported in this build");
1524                use_curl = 1;
1525        }
1526#endif
1527
1528        if (!server.port)
1529                server.port = server.use_ssl ? 993 : 143;
1530
1531        if (!server.folder) {
1532                fprintf(stderr, "no imap store specified\n");
1533                return 1;
1534        }
1535        if (!server.host) {
1536                if (!server.tunnel) {
1537                        fprintf(stderr, "no imap host specified\n");
1538                        return 1;
1539                }
1540                server.host = "tunnel";
1541        }
1542
1543        /* read the messages */
1544        if (read_message(stdin, &all_msgs)) {
1545                fprintf(stderr, "error reading input\n");
1546                return 1;
1547        }
1548
1549        if (all_msgs.len == 0) {
1550                fprintf(stderr, "nothing to send\n");
1551                return 1;
1552        }
1553
1554        total = count_messages(&all_msgs);
1555        if (!total) {
1556                fprintf(stderr, "no messages to send\n");
1557                return 1;
1558        }
1559
1560        /* write it to the imap server */
1561
1562        if (server.tunnel)
1563                return append_msgs_to_imap(&server, &all_msgs, total);
1564
1565#ifdef USE_CURL_FOR_IMAP_SEND
1566        if (use_curl)
1567                return curl_append_msgs_to_imap(&server, &all_msgs, total);
1568#endif
1569
1570        return append_msgs_to_imap(&server, &all_msgs, total);
1571}