imap-send.con commit imap-send: handle missing response codes gracefully (618ec81)
   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        meth = SSLv23_method();
 291        if (!meth) {
 292                ssl_socket_perror("SSLv23_method");
 293                return -1;
 294        }
 295
 296        ctx = SSL_CTX_new(meth);
 297        if (!ctx) {
 298                ssl_socket_perror("SSL_CTX_new");
 299                return -1;
 300        }
 301
 302        if (use_tls_only)
 303                SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3);
 304
 305        if (verify)
 306                SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
 307
 308        if (!SSL_CTX_set_default_verify_paths(ctx)) {
 309                ssl_socket_perror("SSL_CTX_set_default_verify_paths");
 310                return -1;
 311        }
 312        sock->ssl = SSL_new(ctx);
 313        if (!sock->ssl) {
 314                ssl_socket_perror("SSL_new");
 315                return -1;
 316        }
 317        if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
 318                ssl_socket_perror("SSL_set_rfd");
 319                return -1;
 320        }
 321        if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
 322                ssl_socket_perror("SSL_set_wfd");
 323                return -1;
 324        }
 325
 326#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
 327        /*
 328         * SNI (RFC4366)
 329         * OpenSSL does not document this function, but the implementation
 330         * returns 1 on success, 0 on failure after calling SSLerr().
 331         */
 332        ret = SSL_set_tlsext_host_name(sock->ssl, server.host);
 333        if (ret != 1)
 334                warning("SSL_set_tlsext_host_name(%s) failed.", server.host);
 335#endif
 336
 337        ret = SSL_connect(sock->ssl);
 338        if (ret <= 0) {
 339                socket_perror("SSL_connect", sock, ret);
 340                return -1;
 341        }
 342
 343        if (verify) {
 344                /* make sure the hostname matches that of the certificate */
 345                cert = SSL_get_peer_certificate(sock->ssl);
 346                if (!cert)
 347                        return error("unable to get peer certificate.");
 348                if (verify_hostname(cert, server.host) < 0)
 349                        return -1;
 350        }
 351
 352        return 0;
 353}
 354#endif
 355
 356static int socket_read(struct imap_socket *sock, char *buf, int len)
 357{
 358        ssize_t n;
 359#ifndef NO_OPENSSL
 360        if (sock->ssl)
 361                n = SSL_read(sock->ssl, buf, len);
 362        else
 363#endif
 364                n = xread(sock->fd[0], buf, len);
 365        if (n <= 0) {
 366                socket_perror("read", sock, n);
 367                close(sock->fd[0]);
 368                close(sock->fd[1]);
 369                sock->fd[0] = sock->fd[1] = -1;
 370        }
 371        return n;
 372}
 373
 374static int socket_write(struct imap_socket *sock, const char *buf, int len)
 375{
 376        int n;
 377#ifndef NO_OPENSSL
 378        if (sock->ssl)
 379                n = SSL_write(sock->ssl, buf, len);
 380        else
 381#endif
 382                n = write_in_full(sock->fd[1], buf, len);
 383        if (n != len) {
 384                socket_perror("write", sock, n);
 385                close(sock->fd[0]);
 386                close(sock->fd[1]);
 387                sock->fd[0] = sock->fd[1] = -1;
 388        }
 389        return n;
 390}
 391
 392static void socket_shutdown(struct imap_socket *sock)
 393{
 394#ifndef NO_OPENSSL
 395        if (sock->ssl) {
 396                SSL_shutdown(sock->ssl);
 397                SSL_free(sock->ssl);
 398        }
 399#endif
 400        close(sock->fd[0]);
 401        close(sock->fd[1]);
 402}
 403
 404/* simple line buffering */
 405static int buffer_gets(struct imap_buffer *b, char **s)
 406{
 407        int n;
 408        int start = b->offset;
 409
 410        *s = b->buf + start;
 411
 412        for (;;) {
 413                /* make sure we have enough data to read the \r\n sequence */
 414                if (b->offset + 1 >= b->bytes) {
 415                        if (start) {
 416                                /* shift down used bytes */
 417                                *s = b->buf;
 418
 419                                assert(start <= b->bytes);
 420                                n = b->bytes - start;
 421
 422                                if (n)
 423                                        memmove(b->buf, b->buf + start, n);
 424                                b->offset -= start;
 425                                b->bytes = n;
 426                                start = 0;
 427                        }
 428
 429                        n = socket_read(&b->sock, b->buf + b->bytes,
 430                                         sizeof(b->buf) - b->bytes);
 431
 432                        if (n <= 0)
 433                                return -1;
 434
 435                        b->bytes += n;
 436                }
 437
 438                if (b->buf[b->offset] == '\r') {
 439                        assert(b->offset + 1 < b->bytes);
 440                        if (b->buf[b->offset + 1] == '\n') {
 441                                b->buf[b->offset] = 0;  /* terminate the string */
 442                                b->offset += 2; /* next line */
 443                                if (0 < verbosity)
 444                                        puts(*s);
 445                                return 0;
 446                        }
 447                }
 448
 449                b->offset++;
 450        }
 451        /* not reached */
 452}
 453
 454static void imap_info(const char *msg, ...)
 455{
 456        va_list va;
 457
 458        if (0 <= verbosity) {
 459                va_start(va, msg);
 460                vprintf(msg, va);
 461                va_end(va);
 462                fflush(stdout);
 463        }
 464}
 465
 466static void imap_warn(const char *msg, ...)
 467{
 468        va_list va;
 469
 470        if (-2 < verbosity) {
 471                va_start(va, msg);
 472                vfprintf(stderr, msg, va);
 473                va_end(va);
 474        }
 475}
 476
 477static char *next_arg(char **s)
 478{
 479        char *ret;
 480
 481        if (!s || !*s)
 482                return NULL;
 483        while (isspace((unsigned char) **s))
 484                (*s)++;
 485        if (!**s) {
 486                *s = NULL;
 487                return NULL;
 488        }
 489        if (**s == '"') {
 490                ++*s;
 491                ret = *s;
 492                *s = strchr(*s, '"');
 493        } else {
 494                ret = *s;
 495                while (**s && !isspace((unsigned char) **s))
 496                        (*s)++;
 497        }
 498        if (*s) {
 499                if (**s)
 500                        *(*s)++ = 0;
 501                if (!**s)
 502                        *s = NULL;
 503        }
 504        return ret;
 505}
 506
 507static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
 508{
 509        int ret;
 510        va_list va;
 511
 512        va_start(va, fmt);
 513        if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
 514                die("BUG: buffer too small. Please report a bug.");
 515        va_end(va);
 516        return ret;
 517}
 518
 519static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
 520                                       struct imap_cmd_cb *cb,
 521                                       const char *fmt, va_list ap)
 522{
 523        struct imap *imap = ctx->imap;
 524        struct imap_cmd *cmd;
 525        int n, bufl;
 526        char buf[1024];
 527
 528        cmd = xmalloc(sizeof(struct imap_cmd));
 529        nfvasprintf(&cmd->cmd, fmt, ap);
 530        cmd->tag = ++imap->nexttag;
 531
 532        if (cb)
 533                cmd->cb = *cb;
 534        else
 535                memset(&cmd->cb, 0, sizeof(cmd->cb));
 536
 537        while (imap->literal_pending)
 538                get_cmd_result(ctx, NULL);
 539
 540        if (!cmd->cb.data)
 541                bufl = nfsnprintf(buf, sizeof(buf), "%d %s\r\n", cmd->tag, cmd->cmd);
 542        else
 543                bufl = nfsnprintf(buf, sizeof(buf), "%d %s{%d%s}\r\n",
 544                                  cmd->tag, cmd->cmd, cmd->cb.dlen,
 545                                  CAP(LITERALPLUS) ? "+" : "");
 546
 547        if (0 < verbosity) {
 548                if (imap->num_in_progress)
 549                        printf("(%d in progress) ", imap->num_in_progress);
 550                if (!starts_with(cmd->cmd, "LOGIN"))
 551                        printf(">>> %s", buf);
 552                else
 553                        printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
 554        }
 555        if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
 556                free(cmd->cmd);
 557                free(cmd);
 558                if (cb)
 559                        free(cb->data);
 560                return NULL;
 561        }
 562        if (cmd->cb.data) {
 563                if (CAP(LITERALPLUS)) {
 564                        n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
 565                        free(cmd->cb.data);
 566                        if (n != cmd->cb.dlen ||
 567                            socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
 568                                free(cmd->cmd);
 569                                free(cmd);
 570                                return NULL;
 571                        }
 572                        cmd->cb.data = NULL;
 573                } else
 574                        imap->literal_pending = 1;
 575        } else if (cmd->cb.cont)
 576                imap->literal_pending = 1;
 577        cmd->next = NULL;
 578        *imap->in_progress_append = cmd;
 579        imap->in_progress_append = &cmd->next;
 580        imap->num_in_progress++;
 581        return cmd;
 582}
 583
 584__attribute__((format (printf, 3, 4)))
 585static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
 586                     const char *fmt, ...)
 587{
 588        va_list ap;
 589        struct imap_cmd *cmdp;
 590
 591        va_start(ap, fmt);
 592        cmdp = issue_imap_cmd(ctx, cb, fmt, ap);
 593        va_end(ap);
 594        if (!cmdp)
 595                return RESP_BAD;
 596
 597        return get_cmd_result(ctx, cmdp);
 598}
 599
 600__attribute__((format (printf, 3, 4)))
 601static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
 602                       const char *fmt, ...)
 603{
 604        va_list ap;
 605        struct imap_cmd *cmdp;
 606
 607        va_start(ap, fmt);
 608        cmdp = issue_imap_cmd(ctx, cb, fmt, ap);
 609        va_end(ap);
 610        if (!cmdp)
 611                return DRV_STORE_BAD;
 612
 613        switch (get_cmd_result(ctx, cmdp)) {
 614        case RESP_BAD: return DRV_STORE_BAD;
 615        case RESP_NO: return DRV_MSG_BAD;
 616        default: return DRV_OK;
 617        }
 618}
 619
 620static int skip_imap_list_l(char **sp, int level)
 621{
 622        char *s = *sp;
 623
 624        for (;;) {
 625                while (isspace((unsigned char)*s))
 626                        s++;
 627                if (level && *s == ')') {
 628                        s++;
 629                        break;
 630                }
 631                if (*s == '(') {
 632                        /* sublist */
 633                        s++;
 634                        if (skip_imap_list_l(&s, level + 1))
 635                                goto bail;
 636                } else if (*s == '"') {
 637                        /* quoted string */
 638                        s++;
 639                        for (; *s != '"'; s++)
 640                                if (!*s)
 641                                        goto bail;
 642                        s++;
 643                } else {
 644                        /* atom */
 645                        for (; *s && !isspace((unsigned char)*s); s++)
 646                                if (level && *s == ')')
 647                                        break;
 648                }
 649
 650                if (!level)
 651                        break;
 652                if (!*s)
 653                        goto bail;
 654        }
 655        *sp = s;
 656        return 0;
 657
 658bail:
 659        return -1;
 660}
 661
 662static void skip_list(char **sp)
 663{
 664        skip_imap_list_l(sp, 0);
 665}
 666
 667static void parse_capability(struct imap *imap, char *cmd)
 668{
 669        char *arg;
 670        unsigned i;
 671
 672        imap->caps = 0x80000000;
 673        while ((arg = next_arg(&cmd)))
 674                for (i = 0; i < ARRAY_SIZE(cap_list); i++)
 675                        if (!strcmp(cap_list[i], arg))
 676                                imap->caps |= 1 << i;
 677        imap->rcaps = imap->caps;
 678}
 679
 680static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
 681                               char *s)
 682{
 683        struct imap *imap = ctx->imap;
 684        char *arg, *p;
 685
 686        if (!s || *s != '[')
 687                return RESP_OK;         /* no response code */
 688        s++;
 689        if (!(p = strchr(s, ']'))) {
 690                fprintf(stderr, "IMAP error: malformed response code\n");
 691                return RESP_BAD;
 692        }
 693        *p++ = 0;
 694        arg = next_arg(&s);
 695        if (!arg) {
 696                fprintf(stderr, "IMAP error: empty response code\n");
 697                return RESP_BAD;
 698        }
 699        if (!strcmp("UIDVALIDITY", arg)) {
 700                if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg))) {
 701                        fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
 702                        return RESP_BAD;
 703                }
 704        } else if (!strcmp("UIDNEXT", arg)) {
 705                if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
 706                        fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
 707                        return RESP_BAD;
 708                }
 709        } else if (!strcmp("CAPABILITY", arg)) {
 710                parse_capability(imap, s);
 711        } else if (!strcmp("ALERT", arg)) {
 712                /* RFC2060 says that these messages MUST be displayed
 713                 * to the user
 714                 */
 715                for (; isspace((unsigned char)*p); p++);
 716                fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
 717        } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
 718                if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg)) ||
 719                    !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
 720                        fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
 721                        return RESP_BAD;
 722                }
 723        }
 724        return RESP_OK;
 725}
 726
 727static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
 728{
 729        struct imap *imap = ctx->imap;
 730        struct imap_cmd *cmdp, **pcmdp;
 731        char *cmd;
 732        const char *arg, *arg1;
 733        int n, resp, resp2, tag;
 734
 735        for (;;) {
 736                if (buffer_gets(&imap->buf, &cmd))
 737                        return RESP_BAD;
 738
 739                arg = next_arg(&cmd);
 740                if (!arg) {
 741                        fprintf(stderr, "IMAP error: empty response\n");
 742                        return RESP_BAD;
 743                }
 744                if (*arg == '*') {
 745                        arg = next_arg(&cmd);
 746                        if (!arg) {
 747                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 748                                return RESP_BAD;
 749                        }
 750
 751                        if (!strcmp("NAMESPACE", arg)) {
 752                                /* rfc2342 NAMESPACE response. */
 753                                skip_list(&cmd); /* Personal mailboxes */
 754                                skip_list(&cmd); /* Others' mailboxes */
 755                                skip_list(&cmd); /* Shared mailboxes */
 756                        } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
 757                                   !strcmp("NO", arg) || !strcmp("BYE", arg)) {
 758                                if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
 759                                        return resp;
 760                        } else if (!strcmp("CAPABILITY", arg)) {
 761                                parse_capability(imap, cmd);
 762                        } else if ((arg1 = next_arg(&cmd))) {
 763                                ; /*
 764                                   * Unhandled response-data with at least two words.
 765                                   * Ignore it.
 766                                   *
 767                                   * NEEDSWORK: Previously this case handled '<num> EXISTS'
 768                                   * and '<num> RECENT' but as a probably-unintended side
 769                                   * effect it ignores other unrecognized two-word
 770                                   * responses.  imap-send doesn't ever try to read
 771                                   * messages or mailboxes these days, so consider
 772                                   * eliminating this case.
 773                                   */
 774                        } else {
 775                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 776                                return RESP_BAD;
 777                        }
 778                } else if (!imap->in_progress) {
 779                        fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
 780                        return RESP_BAD;
 781                } else if (*arg == '+') {
 782                        /* This can happen only with the last command underway, as
 783                           it enforces a round-trip. */
 784                        cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
 785                               offsetof(struct imap_cmd, next));
 786                        if (cmdp->cb.data) {
 787                                n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
 788                                free(cmdp->cb.data);
 789                                cmdp->cb.data = NULL;
 790                                if (n != (int)cmdp->cb.dlen)
 791                                        return RESP_BAD;
 792                        } else if (cmdp->cb.cont) {
 793                                if (cmdp->cb.cont(ctx, cmdp, cmd))
 794                                        return RESP_BAD;
 795                        } else {
 796                                fprintf(stderr, "IMAP error: unexpected command continuation request\n");
 797                                return RESP_BAD;
 798                        }
 799                        if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
 800                                return RESP_BAD;
 801                        if (!cmdp->cb.cont)
 802                                imap->literal_pending = 0;
 803                        if (!tcmd)
 804                                return DRV_OK;
 805                } else {
 806                        tag = atoi(arg);
 807                        for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
 808                                if (cmdp->tag == tag)
 809                                        goto gottag;
 810                        fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
 811                        return RESP_BAD;
 812                gottag:
 813                        if (!(*pcmdp = cmdp->next))
 814                                imap->in_progress_append = pcmdp;
 815                        imap->num_in_progress--;
 816                        if (cmdp->cb.cont || cmdp->cb.data)
 817                                imap->literal_pending = 0;
 818                        arg = next_arg(&cmd);
 819                        if (!arg)
 820                                arg = "";
 821                        if (!strcmp("OK", arg))
 822                                resp = DRV_OK;
 823                        else {
 824                                if (!strcmp("NO", arg))
 825                                        resp = RESP_NO;
 826                                else /*if (!strcmp("BAD", arg))*/
 827                                        resp = RESP_BAD;
 828                                fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
 829                                        !starts_with(cmdp->cmd, "LOGIN") ?
 830                                                        cmdp->cmd : "LOGIN <user> <pass>",
 831                                                        arg, cmd ? cmd : "");
 832                        }
 833                        if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
 834                                resp = resp2;
 835                        if (cmdp->cb.done)
 836                                cmdp->cb.done(ctx, cmdp, resp);
 837                        free(cmdp->cb.data);
 838                        free(cmdp->cmd);
 839                        free(cmdp);
 840                        if (!tcmd || tcmd == cmdp)
 841                                return resp;
 842                }
 843        }
 844        /* not reached */
 845}
 846
 847static void imap_close_server(struct imap_store *ictx)
 848{
 849        struct imap *imap = ictx->imap;
 850
 851        if (imap->buf.sock.fd[0] != -1) {
 852                imap_exec(ictx, NULL, "LOGOUT");
 853                socket_shutdown(&imap->buf.sock);
 854        }
 855        free(imap);
 856}
 857
 858static void imap_close_store(struct imap_store *ctx)
 859{
 860        imap_close_server(ctx);
 861        free(ctx);
 862}
 863
 864#ifndef NO_OPENSSL
 865
 866/*
 867 * hexchar() and cram() functions are based on the code from the isync
 868 * project (http://isync.sf.net/).
 869 */
 870static char hexchar(unsigned int b)
 871{
 872        return b < 10 ? '0' + b : 'a' + (b - 10);
 873}
 874
 875#define ENCODED_SIZE(n) (4*((n+2)/3))
 876static char *cram(const char *challenge_64, const char *user, const char *pass)
 877{
 878        int i, resp_len, encoded_len, decoded_len;
 879        unsigned char hash[16];
 880        char hex[33];
 881        char *response, *response_64, *challenge;
 882
 883        /*
 884         * length of challenge_64 (i.e. base-64 encoded string) is a good
 885         * enough upper bound for challenge (decoded result).
 886         */
 887        encoded_len = strlen(challenge_64);
 888        challenge = xmalloc(encoded_len);
 889        decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
 890                                      (unsigned char *)challenge_64, encoded_len);
 891        if (decoded_len < 0)
 892                die("invalid challenge %s", challenge_64);
 893        if (!HMAC(EVP_md5(), pass, strlen(pass), (unsigned char *)challenge, decoded_len, hash, NULL))
 894                die("HMAC error");
 895
 896        hex[32] = 0;
 897        for (i = 0; i < 16; i++) {
 898                hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
 899                hex[2 * i + 1] = hexchar(hash[i] & 0xf);
 900        }
 901
 902        /* response: "<user> <digest in hex>" */
 903        response = xstrfmt("%s %s", user, hex);
 904        resp_len = strlen(response);
 905
 906        response_64 = xmallocz(ENCODED_SIZE(resp_len));
 907        encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
 908                                      (unsigned char *)response, resp_len);
 909        if (encoded_len < 0)
 910                die("EVP_EncodeBlock error");
 911        return (char *)response_64;
 912}
 913
 914#else
 915
 916static char *cram(const char *challenge_64, const char *user, const char *pass)
 917{
 918        die("If you want to use CRAM-MD5 authenticate method, "
 919            "you have to build git-imap-send with OpenSSL library.");
 920}
 921
 922#endif
 923
 924static int auth_cram_md5(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt)
 925{
 926        int ret;
 927        char *response;
 928
 929        response = cram(prompt, server.user, server.pass);
 930
 931        ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
 932        if (ret != strlen(response))
 933                return error("IMAP error: sending response failed");
 934
 935        free(response);
 936
 937        return 0;
 938}
 939
 940static struct imap_store *imap_open_store(struct imap_server_conf *srvc, char *folder)
 941{
 942        struct credential cred = CREDENTIAL_INIT;
 943        struct imap_store *ctx;
 944        struct imap *imap;
 945        char *arg, *rsp;
 946        int s = -1, preauth;
 947
 948        ctx = xcalloc(1, sizeof(*ctx));
 949
 950        ctx->imap = imap = xcalloc(1, sizeof(*imap));
 951        imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
 952        imap->in_progress_append = &imap->in_progress;
 953
 954        /* open connection to IMAP server */
 955
 956        if (srvc->tunnel) {
 957                struct child_process tunnel = CHILD_PROCESS_INIT;
 958
 959                imap_info("Starting tunnel '%s'... ", srvc->tunnel);
 960
 961                argv_array_push(&tunnel.args, srvc->tunnel);
 962                tunnel.use_shell = 1;
 963                tunnel.in = -1;
 964                tunnel.out = -1;
 965                if (start_command(&tunnel))
 966                        die("cannot start proxy %s", srvc->tunnel);
 967
 968                imap->buf.sock.fd[0] = tunnel.out;
 969                imap->buf.sock.fd[1] = tunnel.in;
 970
 971                imap_info("ok\n");
 972        } else {
 973#ifndef NO_IPV6
 974                struct addrinfo hints, *ai0, *ai;
 975                int gai;
 976                char portstr[6];
 977
 978                snprintf(portstr, sizeof(portstr), "%d", srvc->port);
 979
 980                memset(&hints, 0, sizeof(hints));
 981                hints.ai_socktype = SOCK_STREAM;
 982                hints.ai_protocol = IPPROTO_TCP;
 983
 984                imap_info("Resolving %s... ", srvc->host);
 985                gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
 986                if (gai) {
 987                        fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
 988                        goto bail;
 989                }
 990                imap_info("ok\n");
 991
 992                for (ai0 = ai; ai; ai = ai->ai_next) {
 993                        char addr[NI_MAXHOST];
 994
 995                        s = socket(ai->ai_family, ai->ai_socktype,
 996                                   ai->ai_protocol);
 997                        if (s < 0)
 998                                continue;
 999
1000                        getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1001                                    sizeof(addr), NULL, 0, NI_NUMERICHOST);
1002                        imap_info("Connecting to [%s]:%s... ", addr, portstr);
1003
1004                        if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1005                                close(s);
1006                                s = -1;
1007                                perror("connect");
1008                                continue;
1009                        }
1010
1011                        break;
1012                }
1013                freeaddrinfo(ai0);
1014#else /* NO_IPV6 */
1015                struct hostent *he;
1016                struct sockaddr_in addr;
1017
1018                memset(&addr, 0, sizeof(addr));
1019                addr.sin_port = htons(srvc->port);
1020                addr.sin_family = AF_INET;
1021
1022                imap_info("Resolving %s... ", srvc->host);
1023                he = gethostbyname(srvc->host);
1024                if (!he) {
1025                        perror("gethostbyname");
1026                        goto bail;
1027                }
1028                imap_info("ok\n");
1029
1030                addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1031
1032                s = socket(PF_INET, SOCK_STREAM, 0);
1033
1034                imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1035                if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1036                        close(s);
1037                        s = -1;
1038                        perror("connect");
1039                }
1040#endif
1041                if (s < 0) {
1042                        fputs("Error: unable to connect to server.\n", stderr);
1043                        goto bail;
1044                }
1045
1046                imap->buf.sock.fd[0] = s;
1047                imap->buf.sock.fd[1] = dup(s);
1048
1049                if (srvc->use_ssl &&
1050                    ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1051                        close(s);
1052                        goto bail;
1053                }
1054                imap_info("ok\n");
1055        }
1056
1057        /* read the greeting string */
1058        if (buffer_gets(&imap->buf, &rsp)) {
1059                fprintf(stderr, "IMAP error: no greeting response\n");
1060                goto bail;
1061        }
1062        arg = next_arg(&rsp);
1063        if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1064                fprintf(stderr, "IMAP error: invalid greeting response\n");
1065                goto bail;
1066        }
1067        preauth = 0;
1068        if (!strcmp("PREAUTH", arg))
1069                preauth = 1;
1070        else if (strcmp("OK", arg) != 0) {
1071                fprintf(stderr, "IMAP error: unknown greeting response\n");
1072                goto bail;
1073        }
1074        parse_response_code(ctx, NULL, rsp);
1075        if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1076                goto bail;
1077
1078        if (!preauth) {
1079#ifndef NO_OPENSSL
1080                if (!srvc->use_ssl && CAP(STARTTLS)) {
1081                        if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK)
1082                                goto bail;
1083                        if (ssl_socket_connect(&imap->buf.sock, 1,
1084                                               srvc->ssl_verify))
1085                                goto bail;
1086                        /* capabilities may have changed, so get the new capabilities */
1087                        if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1088                                goto bail;
1089                }
1090#endif
1091                imap_info("Logging in...\n");
1092                if (!srvc->user || !srvc->pass) {
1093                        cred.protocol = xstrdup(srvc->use_ssl ? "imaps" : "imap");
1094                        cred.host = xstrdup(srvc->host);
1095
1096                        cred.username = xstrdup_or_null(srvc->user);
1097                        cred.password = xstrdup_or_null(srvc->pass);
1098
1099                        credential_fill(&cred);
1100
1101                        if (!srvc->user)
1102                                srvc->user = xstrdup(cred.username);
1103                        if (!srvc->pass)
1104                                srvc->pass = xstrdup(cred.password);
1105                }
1106
1107                if (srvc->auth_method) {
1108                        struct imap_cmd_cb cb;
1109
1110                        if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1111                                if (!CAP(AUTH_CRAM_MD5)) {
1112                                        fprintf(stderr, "You specified"
1113                                                "CRAM-MD5 as authentication method, "
1114                                                "but %s doesn't support it.\n", srvc->host);
1115                                        goto bail;
1116                                }
1117                                /* CRAM-MD5 */
1118
1119                                memset(&cb, 0, sizeof(cb));
1120                                cb.cont = auth_cram_md5;
1121                                if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1122                                        fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1123                                        goto bail;
1124                                }
1125                        } else {
1126                                fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1127                                goto bail;
1128                        }
1129                } else {
1130                        if (CAP(NOLOGIN)) {
1131                                fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n",
1132                                        srvc->user, srvc->host);
1133                                goto bail;
1134                        }
1135                        if (!imap->buf.sock.ssl)
1136                                imap_warn("*** IMAP Warning *** Password is being "
1137                                          "sent in the clear\n");
1138                        if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1139                                fprintf(stderr, "IMAP error: LOGIN failed\n");
1140                                goto bail;
1141                        }
1142                }
1143        } /* !preauth */
1144
1145        if (cred.username)
1146                credential_approve(&cred);
1147        credential_clear(&cred);
1148
1149        /* check the target mailbox exists */
1150        ctx->name = folder;
1151        switch (imap_exec(ctx, NULL, "EXAMINE \"%s\"", ctx->name)) {
1152        case RESP_OK:
1153                /* ok */
1154                break;
1155        case RESP_BAD:
1156                fprintf(stderr, "IMAP error: could not check mailbox\n");
1157                goto out;
1158        case RESP_NO:
1159                if (imap_exec(ctx, NULL, "CREATE \"%s\"", ctx->name) == RESP_OK) {
1160                        imap_info("Created missing mailbox\n");
1161                } else {
1162                        fprintf(stderr, "IMAP error: could not create missing mailbox\n");
1163                        goto out;
1164                }
1165                break;
1166        }
1167
1168        ctx->prefix = "";
1169        return ctx;
1170
1171bail:
1172        if (cred.username)
1173                credential_reject(&cred);
1174        credential_clear(&cred);
1175
1176 out:
1177        imap_close_store(ctx);
1178        return NULL;
1179}
1180
1181/*
1182 * Insert CR characters as necessary in *msg to ensure that every LF
1183 * character in *msg is preceded by a CR.
1184 */
1185static void lf_to_crlf(struct strbuf *msg)
1186{
1187        char *new;
1188        size_t i, j;
1189        char lastc;
1190
1191        /* First pass: tally, in j, the size of the new string: */
1192        for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1193                if (msg->buf[i] == '\n' && lastc != '\r')
1194                        j++; /* a CR will need to be added here */
1195                lastc = msg->buf[i];
1196                j++;
1197        }
1198
1199        new = xmallocz(j);
1200
1201        /*
1202         * Second pass: write the new string.  Note that this loop is
1203         * otherwise identical to the first pass.
1204         */
1205        for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1206                if (msg->buf[i] == '\n' && lastc != '\r')
1207                        new[j++] = '\r';
1208                lastc = new[j++] = msg->buf[i];
1209        }
1210        strbuf_attach(msg, new, j, j + 1);
1211}
1212
1213/*
1214 * Store msg to IMAP.  Also detach and free the data from msg->data,
1215 * leaving msg->data empty.
1216 */
1217static int imap_store_msg(struct imap_store *ctx, struct strbuf *msg)
1218{
1219        struct imap *imap = ctx->imap;
1220        struct imap_cmd_cb cb;
1221        const char *prefix, *box;
1222        int ret;
1223
1224        lf_to_crlf(msg);
1225        memset(&cb, 0, sizeof(cb));
1226
1227        cb.dlen = msg->len;
1228        cb.data = strbuf_detach(msg, NULL);
1229
1230        box = ctx->name;
1231        prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1232        ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" ", prefix, box);
1233        imap->caps = imap->rcaps;
1234        if (ret != DRV_OK)
1235                return ret;
1236
1237        return DRV_OK;
1238}
1239
1240static void wrap_in_html(struct strbuf *msg)
1241{
1242        struct strbuf buf = STRBUF_INIT;
1243        static char *content_type = "Content-Type: text/html;\n";
1244        static char *pre_open = "<pre>\n";
1245        static char *pre_close = "</pre>\n";
1246        const char *body = strstr(msg->buf, "\n\n");
1247
1248        if (!body)
1249                return; /* Headers but no body; no wrapping needed */
1250
1251        body += 2;
1252
1253        strbuf_add(&buf, msg->buf, body - msg->buf - 1);
1254        strbuf_addstr(&buf, content_type);
1255        strbuf_addch(&buf, '\n');
1256        strbuf_addstr(&buf, pre_open);
1257        strbuf_addstr_xml_quoted(&buf, body);
1258        strbuf_addstr(&buf, pre_close);
1259
1260        strbuf_release(msg);
1261        *msg = buf;
1262}
1263
1264#define CHUNKSIZE 0x1000
1265
1266static int read_message(FILE *f, struct strbuf *all_msgs)
1267{
1268        do {
1269                if (strbuf_fread(all_msgs, CHUNKSIZE, f) <= 0)
1270                        break;
1271        } while (!feof(f));
1272
1273        return ferror(f) ? -1 : 0;
1274}
1275
1276static int count_messages(struct strbuf *all_msgs)
1277{
1278        int count = 0;
1279        char *p = all_msgs->buf;
1280
1281        while (1) {
1282                if (starts_with(p, "From ")) {
1283                        p = strstr(p+5, "\nFrom: ");
1284                        if (!p) break;
1285                        p = strstr(p+7, "\nDate: ");
1286                        if (!p) break;
1287                        p = strstr(p+7, "\nSubject: ");
1288                        if (!p) break;
1289                        p += 10;
1290                        count++;
1291                }
1292                p = strstr(p+5, "\nFrom ");
1293                if (!p)
1294                        break;
1295                p++;
1296        }
1297        return count;
1298}
1299
1300/*
1301 * Copy the next message from all_msgs, starting at offset *ofs, to
1302 * msg.  Update *ofs to the start of the following message.  Return
1303 * true iff a message was successfully copied.
1304 */
1305static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs)
1306{
1307        char *p, *data;
1308        size_t len;
1309
1310        if (*ofs >= all_msgs->len)
1311                return 0;
1312
1313        data = &all_msgs->buf[*ofs];
1314        len = all_msgs->len - *ofs;
1315
1316        if (len < 5 || !starts_with(data, "From "))
1317                return 0;
1318
1319        p = strchr(data, '\n');
1320        if (p) {
1321                p++;
1322                len -= p - data;
1323                *ofs += p - data;
1324                data = p;
1325        }
1326
1327        p = strstr(data, "\nFrom ");
1328        if (p)
1329                len = &p[1] - data;
1330
1331        strbuf_add(msg, data, len);
1332        *ofs += len;
1333        return 1;
1334}
1335
1336static void git_imap_config(void)
1337{
1338        const char *val = NULL;
1339
1340        git_config_get_bool("imap.sslverify", &server.ssl_verify);
1341        git_config_get_bool("imap.preformattedhtml", &server.use_html);
1342        git_config_get_string("imap.folder", &server.folder);
1343
1344        if (!git_config_get_value("imap.host", &val)) {
1345                if (!val) {
1346                        git_die_config("imap.host", "Missing value for 'imap.host'");
1347                } else {
1348                        if (starts_with(val, "imap:"))
1349                                val += 5;
1350                        else if (starts_with(val, "imaps:")) {
1351                                val += 6;
1352                                server.use_ssl = 1;
1353                        }
1354                        if (starts_with(val, "//"))
1355                                val += 2;
1356                        server.host = xstrdup(val);
1357                }
1358        }
1359
1360        git_config_get_string("imap.user", &server.user);
1361        git_config_get_string("imap.pass", &server.pass);
1362        git_config_get_int("imap.port", &server.port);
1363        git_config_get_string("imap.tunnel", &server.tunnel);
1364        git_config_get_string("imap.authmethod", &server.auth_method);
1365}
1366
1367static int append_msgs_to_imap(struct imap_server_conf *server,
1368                               struct strbuf* all_msgs, int total)
1369{
1370        struct strbuf msg = STRBUF_INIT;
1371        struct imap_store *ctx = NULL;
1372        int ofs = 0;
1373        int r;
1374        int n = 0;
1375
1376        ctx = imap_open_store(server, server->folder);
1377        if (!ctx) {
1378                fprintf(stderr, "failed to open store\n");
1379                return 1;
1380        }
1381        ctx->name = server->folder;
1382
1383        fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1384        while (1) {
1385                unsigned percent = n * 100 / total;
1386
1387                fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1388
1389                if (!split_msg(all_msgs, &msg, &ofs))
1390                        break;
1391                if (server->use_html)
1392                        wrap_in_html(&msg);
1393                r = imap_store_msg(ctx, &msg);
1394                if (r != DRV_OK)
1395                        break;
1396                n++;
1397        }
1398        fprintf(stderr, "\n");
1399
1400        imap_close_store(ctx);
1401
1402        return 0;
1403}
1404
1405#ifdef USE_CURL_FOR_IMAP_SEND
1406static CURL *setup_curl(struct imap_server_conf *srvc)
1407{
1408        CURL *curl;
1409        struct strbuf path = STRBUF_INIT;
1410
1411        if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
1412                die("curl_global_init failed");
1413
1414        curl = curl_easy_init();
1415
1416        if (!curl)
1417                die("curl_easy_init failed");
1418
1419        curl_easy_setopt(curl, CURLOPT_USERNAME, server.user);
1420        curl_easy_setopt(curl, CURLOPT_PASSWORD, server.pass);
1421
1422        strbuf_addstr(&path, server.use_ssl ? "imaps://" : "imap://");
1423        strbuf_addstr(&path, server.host);
1424        if (!path.len || path.buf[path.len - 1] != '/')
1425                strbuf_addch(&path, '/');
1426        strbuf_addstr(&path, server.folder);
1427
1428        curl_easy_setopt(curl, CURLOPT_URL, path.buf);
1429        strbuf_release(&path);
1430        curl_easy_setopt(curl, CURLOPT_PORT, server.port);
1431
1432        if (server.auth_method) {
1433#if LIBCURL_VERSION_NUM < 0x072200
1434                warning("No LOGIN_OPTIONS support in this cURL version");
1435#else
1436                struct strbuf auth = STRBUF_INIT;
1437                strbuf_addstr(&auth, "AUTH=");
1438                strbuf_addstr(&auth, server.auth_method);
1439                curl_easy_setopt(curl, CURLOPT_LOGIN_OPTIONS, auth.buf);
1440                strbuf_release(&auth);
1441#endif
1442        }
1443
1444        if (!server.use_ssl)
1445                curl_easy_setopt(curl, CURLOPT_USE_SSL, (long)CURLUSESSL_TRY);
1446
1447        curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, server.ssl_verify);
1448        curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, server.ssl_verify);
1449
1450        curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
1451
1452        curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
1453
1454        if (0 < verbosity || getenv("GIT_CURL_VERBOSE"))
1455                curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
1456        setup_curl_trace(curl);
1457
1458        return curl;
1459}
1460
1461static int curl_append_msgs_to_imap(struct imap_server_conf *server,
1462                                    struct strbuf* all_msgs, int total) {
1463        int ofs = 0;
1464        int n = 0;
1465        struct buffer msgbuf = { STRBUF_INIT, 0 };
1466        CURL *curl;
1467        CURLcode res = CURLE_OK;
1468
1469        curl = setup_curl(server);
1470        curl_easy_setopt(curl, CURLOPT_READDATA, &msgbuf);
1471
1472        fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1473        while (1) {
1474                unsigned percent = n * 100 / total;
1475                int prev_len;
1476
1477                fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1478
1479                prev_len = msgbuf.buf.len;
1480                if (!split_msg(all_msgs, &msgbuf.buf, &ofs))
1481                        break;
1482                if (server->use_html)
1483                        wrap_in_html(&msgbuf.buf);
1484                lf_to_crlf(&msgbuf.buf);
1485
1486                curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE,
1487                                 (curl_off_t)(msgbuf.buf.len-prev_len));
1488
1489                res = curl_easy_perform(curl);
1490
1491                if(res != CURLE_OK) {
1492                        fprintf(stderr, "curl_easy_perform() failed: %s\n",
1493                                        curl_easy_strerror(res));
1494                        break;
1495                }
1496
1497                n++;
1498        }
1499        fprintf(stderr, "\n");
1500
1501        curl_easy_cleanup(curl);
1502        curl_global_cleanup();
1503
1504        return 0;
1505}
1506#endif
1507
1508int cmd_main(int argc, const char **argv)
1509{
1510        struct strbuf all_msgs = STRBUF_INIT;
1511        int total;
1512        int nongit_ok;
1513
1514        setup_git_directory_gently(&nongit_ok);
1515        git_imap_config();
1516
1517        argc = parse_options(argc, (const char **)argv, "", imap_send_options, imap_send_usage, 0);
1518
1519        if (argc)
1520                usage_with_options(imap_send_usage, imap_send_options);
1521
1522#ifndef USE_CURL_FOR_IMAP_SEND
1523        if (use_curl) {
1524                warning("--curl not supported in this build");
1525                use_curl = 0;
1526        }
1527#elif defined(NO_OPENSSL)
1528        if (!use_curl) {
1529                warning("--no-curl not supported in this build");
1530                use_curl = 1;
1531        }
1532#endif
1533
1534        if (!server.port)
1535                server.port = server.use_ssl ? 993 : 143;
1536
1537        if (!server.folder) {
1538                fprintf(stderr, "no imap store specified\n");
1539                return 1;
1540        }
1541        if (!server.host) {
1542                if (!server.tunnel) {
1543                        fprintf(stderr, "no imap host specified\n");
1544                        return 1;
1545                }
1546                server.host = "tunnel";
1547        }
1548
1549        /* read the messages */
1550        if (read_message(stdin, &all_msgs)) {
1551                fprintf(stderr, "error reading input\n");
1552                return 1;
1553        }
1554
1555        if (all_msgs.len == 0) {
1556                fprintf(stderr, "nothing to send\n");
1557                return 1;
1558        }
1559
1560        total = count_messages(&all_msgs);
1561        if (!total) {
1562                fprintf(stderr, "no messages to send\n");
1563                return 1;
1564        }
1565
1566        /* write it to the imap server */
1567
1568        if (server.tunnel)
1569                return append_msgs_to_imap(&server, &all_msgs, total);
1570
1571#ifdef USE_CURL_FOR_IMAP_SEND
1572        if (use_curl)
1573                return curl_append_msgs_to_imap(&server, &all_msgs, total);
1574#endif
1575
1576        return append_msgs_to_imap(&server, &all_msgs, total);
1577}