imap-send.con commit Merge branch 'dl/rebase-i-keep-base' (640f9cd)
   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, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24#include "cache.h"
  25#include "config.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)
  38/* Always default to curl if it's available. */
  39#define USE_CURL_DEFAULT 1
  40#else
  41/* We don't have curl, so continue to use the historical implementation */
  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                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_AND_NULL(cmdp->cb.data);
 789                                if (n != (int)cmdp->cb.dlen)
 790                                        return RESP_BAD;
 791                        } else if (cmdp->cb.cont) {
 792                                if (cmdp->cb.cont(ctx, cmdp, cmd))
 793                                        return RESP_BAD;
 794                        } else {
 795                                fprintf(stderr, "IMAP error: unexpected command continuation request\n");
 796                                return RESP_BAD;
 797                        }
 798                        if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
 799                                return RESP_BAD;
 800                        if (!cmdp->cb.cont)
 801                                imap->literal_pending = 0;
 802                        if (!tcmd)
 803                                return DRV_OK;
 804                } else {
 805                        tag = atoi(arg);
 806                        for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
 807                                if (cmdp->tag == tag)
 808                                        goto gottag;
 809                        fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
 810                        return RESP_BAD;
 811                gottag:
 812                        if (!(*pcmdp = cmdp->next))
 813                                imap->in_progress_append = pcmdp;
 814                        imap->num_in_progress--;
 815                        if (cmdp->cb.cont || cmdp->cb.data)
 816                                imap->literal_pending = 0;
 817                        arg = next_arg(&cmd);
 818                        if (!arg)
 819                                arg = "";
 820                        if (!strcmp("OK", arg))
 821                                resp = DRV_OK;
 822                        else {
 823                                if (!strcmp("NO", arg))
 824                                        resp = RESP_NO;
 825                                else /*if (!strcmp("BAD", arg))*/
 826                                        resp = RESP_BAD;
 827                                fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
 828                                        !starts_with(cmdp->cmd, "LOGIN") ?
 829                                                        cmdp->cmd : "LOGIN <user> <pass>",
 830                                                        arg, cmd ? cmd : "");
 831                        }
 832                        if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
 833                                resp = resp2;
 834                        if (cmdp->cb.done)
 835                                cmdp->cb.done(ctx, cmdp, resp);
 836                        free(cmdp->cb.data);
 837                        free(cmdp->cmd);
 838                        free(cmdp);
 839                        if (!tcmd || tcmd == cmdp)
 840                                return resp;
 841                }
 842        }
 843        /* not reached */
 844}
 845
 846static void imap_close_server(struct imap_store *ictx)
 847{
 848        struct imap *imap = ictx->imap;
 849
 850        if (imap->buf.sock.fd[0] != -1) {
 851                imap_exec(ictx, NULL, "LOGOUT");
 852                socket_shutdown(&imap->buf.sock);
 853        }
 854        free(imap);
 855}
 856
 857static void imap_close_store(struct imap_store *ctx)
 858{
 859        imap_close_server(ctx);
 860        free(ctx);
 861}
 862
 863#ifndef NO_OPENSSL
 864
 865/*
 866 * hexchar() and cram() functions are based on the code from the isync
 867 * project (http://isync.sf.net/).
 868 */
 869static char hexchar(unsigned int b)
 870{
 871        return b < 10 ? '0' + b : 'a' + (b - 10);
 872}
 873
 874#define ENCODED_SIZE(n) (4 * DIV_ROUND_UP((n), 3))
 875static char *cram(const char *challenge_64, const char *user, const char *pass)
 876{
 877        int i, resp_len, encoded_len, decoded_len;
 878        unsigned char hash[16];
 879        char hex[33];
 880        char *response, *response_64, *challenge;
 881
 882        /*
 883         * length of challenge_64 (i.e. base-64 encoded string) is a good
 884         * enough upper bound for challenge (decoded result).
 885         */
 886        encoded_len = strlen(challenge_64);
 887        challenge = xmalloc(encoded_len);
 888        decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
 889                                      (unsigned char *)challenge_64, encoded_len);
 890        if (decoded_len < 0)
 891                die("invalid challenge %s", challenge_64);
 892        if (!HMAC(EVP_md5(), pass, strlen(pass), (unsigned char *)challenge, decoded_len, hash, NULL))
 893                die("HMAC error");
 894
 895        hex[32] = 0;
 896        for (i = 0; i < 16; i++) {
 897                hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
 898                hex[2 * i + 1] = hexchar(hash[i] & 0xf);
 899        }
 900
 901        /* response: "<user> <digest in hex>" */
 902        response = xstrfmt("%s %s", user, hex);
 903        resp_len = strlen(response);
 904
 905        response_64 = xmallocz(ENCODED_SIZE(resp_len));
 906        encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
 907                                      (unsigned char *)response, resp_len);
 908        if (encoded_len < 0)
 909                die("EVP_EncodeBlock error");
 910        return (char *)response_64;
 911}
 912
 913#else
 914
 915static char *cram(const char *challenge_64, const char *user, const char *pass)
 916{
 917        die("If you want to use CRAM-MD5 authenticate method, "
 918            "you have to build git-imap-send with OpenSSL library.");
 919}
 920
 921#endif
 922
 923static int auth_cram_md5(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt)
 924{
 925        int ret;
 926        char *response;
 927
 928        response = cram(prompt, server.user, server.pass);
 929
 930        ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
 931        if (ret != strlen(response))
 932                return error("IMAP error: sending response failed");
 933
 934        free(response);
 935
 936        return 0;
 937}
 938
 939static void server_fill_credential(struct imap_server_conf *srvc, struct credential *cred)
 940{
 941        if (srvc->user && srvc->pass)
 942                return;
 943
 944        cred->protocol = xstrdup(srvc->use_ssl ? "imaps" : "imap");
 945        cred->host = xstrdup(srvc->host);
 946
 947        cred->username = xstrdup_or_null(srvc->user);
 948        cred->password = xstrdup_or_null(srvc->pass);
 949
 950        credential_fill(cred);
 951
 952        if (!srvc->user)
 953                srvc->user = xstrdup(cred->username);
 954        if (!srvc->pass)
 955                srvc->pass = xstrdup(cred->password);
 956}
 957
 958static struct imap_store *imap_open_store(struct imap_server_conf *srvc, char *folder)
 959{
 960        struct credential cred = CREDENTIAL_INIT;
 961        struct imap_store *ctx;
 962        struct imap *imap;
 963        char *arg, *rsp;
 964        int s = -1, preauth;
 965
 966        ctx = xcalloc(1, sizeof(*ctx));
 967
 968        ctx->imap = imap = xcalloc(1, sizeof(*imap));
 969        imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
 970        imap->in_progress_append = &imap->in_progress;
 971
 972        /* open connection to IMAP server */
 973
 974        if (srvc->tunnel) {
 975                struct child_process tunnel = CHILD_PROCESS_INIT;
 976
 977                imap_info("Starting tunnel '%s'... ", srvc->tunnel);
 978
 979                argv_array_push(&tunnel.args, srvc->tunnel);
 980                tunnel.use_shell = 1;
 981                tunnel.in = -1;
 982                tunnel.out = -1;
 983                if (start_command(&tunnel))
 984                        die("cannot start proxy %s", srvc->tunnel);
 985
 986                imap->buf.sock.fd[0] = tunnel.out;
 987                imap->buf.sock.fd[1] = tunnel.in;
 988
 989                imap_info("ok\n");
 990        } else {
 991#ifndef NO_IPV6
 992                struct addrinfo hints, *ai0, *ai;
 993                int gai;
 994                char portstr[6];
 995
 996                xsnprintf(portstr, sizeof(portstr), "%d", srvc->port);
 997
 998                memset(&hints, 0, sizeof(hints));
 999                hints.ai_socktype = SOCK_STREAM;
1000                hints.ai_protocol = IPPROTO_TCP;
1001
1002                imap_info("Resolving %s... ", srvc->host);
1003                gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
1004                if (gai) {
1005                        fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
1006                        goto bail;
1007                }
1008                imap_info("ok\n");
1009
1010                for (ai0 = ai; ai; ai = ai->ai_next) {
1011                        char addr[NI_MAXHOST];
1012
1013                        s = socket(ai->ai_family, ai->ai_socktype,
1014                                   ai->ai_protocol);
1015                        if (s < 0)
1016                                continue;
1017
1018                        getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1019                                    sizeof(addr), NULL, 0, NI_NUMERICHOST);
1020                        imap_info("Connecting to [%s]:%s... ", addr, portstr);
1021
1022                        if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1023                                close(s);
1024                                s = -1;
1025                                perror("connect");
1026                                continue;
1027                        }
1028
1029                        break;
1030                }
1031                freeaddrinfo(ai0);
1032#else /* NO_IPV6 */
1033                struct hostent *he;
1034                struct sockaddr_in addr;
1035
1036                memset(&addr, 0, sizeof(addr));
1037                addr.sin_port = htons(srvc->port);
1038                addr.sin_family = AF_INET;
1039
1040                imap_info("Resolving %s... ", srvc->host);
1041                he = gethostbyname(srvc->host);
1042                if (!he) {
1043                        perror("gethostbyname");
1044                        goto bail;
1045                }
1046                imap_info("ok\n");
1047
1048                addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1049
1050                s = socket(PF_INET, SOCK_STREAM, 0);
1051
1052                imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1053                if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1054                        close(s);
1055                        s = -1;
1056                        perror("connect");
1057                }
1058#endif
1059                if (s < 0) {
1060                        fputs("Error: unable to connect to server.\n", stderr);
1061                        goto bail;
1062                }
1063
1064                imap->buf.sock.fd[0] = s;
1065                imap->buf.sock.fd[1] = dup(s);
1066
1067                if (srvc->use_ssl &&
1068                    ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1069                        close(s);
1070                        goto bail;
1071                }
1072                imap_info("ok\n");
1073        }
1074
1075        /* read the greeting string */
1076        if (buffer_gets(&imap->buf, &rsp)) {
1077                fprintf(stderr, "IMAP error: no greeting response\n");
1078                goto bail;
1079        }
1080        arg = next_arg(&rsp);
1081        if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1082                fprintf(stderr, "IMAP error: invalid greeting response\n");
1083                goto bail;
1084        }
1085        preauth = 0;
1086        if (!strcmp("PREAUTH", arg))
1087                preauth = 1;
1088        else if (strcmp("OK", arg) != 0) {
1089                fprintf(stderr, "IMAP error: unknown greeting response\n");
1090                goto bail;
1091        }
1092        parse_response_code(ctx, NULL, rsp);
1093        if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1094                goto bail;
1095
1096        if (!preauth) {
1097#ifndef NO_OPENSSL
1098                if (!srvc->use_ssl && CAP(STARTTLS)) {
1099                        if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK)
1100                                goto bail;
1101                        if (ssl_socket_connect(&imap->buf.sock, 1,
1102                                               srvc->ssl_verify))
1103                                goto bail;
1104                        /* capabilities may have changed, so get the new capabilities */
1105                        if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1106                                goto bail;
1107                }
1108#endif
1109                imap_info("Logging in...\n");
1110                server_fill_credential(srvc, &cred);
1111
1112                if (srvc->auth_method) {
1113                        struct imap_cmd_cb cb;
1114
1115                        if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1116                                if (!CAP(AUTH_CRAM_MD5)) {
1117                                        fprintf(stderr, "You specified "
1118                                                "CRAM-MD5 as authentication method, "
1119                                                "but %s doesn't support it.\n", srvc->host);
1120                                        goto bail;
1121                                }
1122                                /* CRAM-MD5 */
1123
1124                                memset(&cb, 0, sizeof(cb));
1125                                cb.cont = auth_cram_md5;
1126                                if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1127                                        fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1128                                        goto bail;
1129                                }
1130                        } else {
1131                                fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1132                                goto bail;
1133                        }
1134                } else {
1135                        if (CAP(NOLOGIN)) {
1136                                fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n",
1137                                        srvc->user, srvc->host);
1138                                goto bail;
1139                        }
1140                        if (!imap->buf.sock.ssl)
1141                                imap_warn("*** IMAP Warning *** Password is being "
1142                                          "sent in the clear\n");
1143                        if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1144                                fprintf(stderr, "IMAP error: LOGIN failed\n");
1145                                goto bail;
1146                        }
1147                }
1148        } /* !preauth */
1149
1150        if (cred.username)
1151                credential_approve(&cred);
1152        credential_clear(&cred);
1153
1154        /* check the target mailbox exists */
1155        ctx->name = folder;
1156        switch (imap_exec(ctx, NULL, "EXAMINE \"%s\"", ctx->name)) {
1157        case RESP_OK:
1158                /* ok */
1159                break;
1160        case RESP_BAD:
1161                fprintf(stderr, "IMAP error: could not check mailbox\n");
1162                goto out;
1163        case RESP_NO:
1164                if (imap_exec(ctx, NULL, "CREATE \"%s\"", ctx->name) == RESP_OK) {
1165                        imap_info("Created missing mailbox\n");
1166                } else {
1167                        fprintf(stderr, "IMAP error: could not create missing mailbox\n");
1168                        goto out;
1169                }
1170                break;
1171        }
1172
1173        ctx->prefix = "";
1174        return ctx;
1175
1176bail:
1177        if (cred.username)
1178                credential_reject(&cred);
1179        credential_clear(&cred);
1180
1181 out:
1182        imap_close_store(ctx);
1183        return NULL;
1184}
1185
1186/*
1187 * Insert CR characters as necessary in *msg to ensure that every LF
1188 * character in *msg is preceded by a CR.
1189 */
1190static void lf_to_crlf(struct strbuf *msg)
1191{
1192        char *new_msg;
1193        size_t i, j;
1194        char lastc;
1195
1196        /* First pass: tally, in j, the size of the new_msg string: */
1197        for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1198                if (msg->buf[i] == '\n' && lastc != '\r')
1199                        j++; /* a CR will need to be added here */
1200                lastc = msg->buf[i];
1201                j++;
1202        }
1203
1204        new_msg = xmallocz(j);
1205
1206        /*
1207         * Second pass: write the new_msg string.  Note that this loop is
1208         * otherwise identical to the first pass.
1209         */
1210        for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1211                if (msg->buf[i] == '\n' && lastc != '\r')
1212                        new_msg[j++] = '\r';
1213                lastc = new_msg[j++] = msg->buf[i];
1214        }
1215        strbuf_attach(msg, new_msg, j, j + 1);
1216}
1217
1218/*
1219 * Store msg to IMAP.  Also detach and free the data from msg->data,
1220 * leaving msg->data empty.
1221 */
1222static int imap_store_msg(struct imap_store *ctx, struct strbuf *msg)
1223{
1224        struct imap *imap = ctx->imap;
1225        struct imap_cmd_cb cb;
1226        const char *prefix, *box;
1227        int ret;
1228
1229        lf_to_crlf(msg);
1230        memset(&cb, 0, sizeof(cb));
1231
1232        cb.dlen = msg->len;
1233        cb.data = strbuf_detach(msg, NULL);
1234
1235        box = ctx->name;
1236        prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1237        ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" ", prefix, box);
1238        imap->caps = imap->rcaps;
1239        if (ret != DRV_OK)
1240                return ret;
1241
1242        return DRV_OK;
1243}
1244
1245static void wrap_in_html(struct strbuf *msg)
1246{
1247        struct strbuf buf = STRBUF_INIT;
1248        static char *content_type = "Content-Type: text/html;\n";
1249        static char *pre_open = "<pre>\n";
1250        static char *pre_close = "</pre>\n";
1251        const char *body = strstr(msg->buf, "\n\n");
1252
1253        if (!body)
1254                return; /* Headers but no body; no wrapping needed */
1255
1256        body += 2;
1257
1258        strbuf_add(&buf, msg->buf, body - msg->buf - 1);
1259        strbuf_addstr(&buf, content_type);
1260        strbuf_addch(&buf, '\n');
1261        strbuf_addstr(&buf, pre_open);
1262        strbuf_addstr_xml_quoted(&buf, body);
1263        strbuf_addstr(&buf, pre_close);
1264
1265        strbuf_release(msg);
1266        *msg = buf;
1267}
1268
1269#define CHUNKSIZE 0x1000
1270
1271static int read_message(FILE *f, struct strbuf *all_msgs)
1272{
1273        do {
1274                if (strbuf_fread(all_msgs, CHUNKSIZE, f) <= 0)
1275                        break;
1276        } while (!feof(f));
1277
1278        return ferror(f) ? -1 : 0;
1279}
1280
1281static int count_messages(struct strbuf *all_msgs)
1282{
1283        int count = 0;
1284        char *p = all_msgs->buf;
1285
1286        while (1) {
1287                if (starts_with(p, "From ")) {
1288                        p = strstr(p+5, "\nFrom: ");
1289                        if (!p) break;
1290                        p = strstr(p+7, "\nDate: ");
1291                        if (!p) break;
1292                        p = strstr(p+7, "\nSubject: ");
1293                        if (!p) break;
1294                        p += 10;
1295                        count++;
1296                }
1297                p = strstr(p+5, "\nFrom ");
1298                if (!p)
1299                        break;
1300                p++;
1301        }
1302        return count;
1303}
1304
1305/*
1306 * Copy the next message from all_msgs, starting at offset *ofs, to
1307 * msg.  Update *ofs to the start of the following message.  Return
1308 * true iff a message was successfully copied.
1309 */
1310static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs)
1311{
1312        char *p, *data;
1313        size_t len;
1314
1315        if (*ofs >= all_msgs->len)
1316                return 0;
1317
1318        data = &all_msgs->buf[*ofs];
1319        len = all_msgs->len - *ofs;
1320
1321        if (len < 5 || !starts_with(data, "From "))
1322                return 0;
1323
1324        p = strchr(data, '\n');
1325        if (p) {
1326                p++;
1327                len -= p - data;
1328                *ofs += p - data;
1329                data = p;
1330        }
1331
1332        p = strstr(data, "\nFrom ");
1333        if (p)
1334                len = &p[1] - data;
1335
1336        strbuf_add(msg, data, len);
1337        *ofs += len;
1338        return 1;
1339}
1340
1341static void git_imap_config(void)
1342{
1343        const char *val = NULL;
1344
1345        git_config_get_bool("imap.sslverify", &server.ssl_verify);
1346        git_config_get_bool("imap.preformattedhtml", &server.use_html);
1347        git_config_get_string("imap.folder", &server.folder);
1348
1349        if (!git_config_get_value("imap.host", &val)) {
1350                if (!val) {
1351                        git_die_config("imap.host", "Missing value for 'imap.host'");
1352                } else {
1353                        if (starts_with(val, "imap:"))
1354                                val += 5;
1355                        else if (starts_with(val, "imaps:")) {
1356                                val += 6;
1357                                server.use_ssl = 1;
1358                        }
1359                        if (starts_with(val, "//"))
1360                                val += 2;
1361                        server.host = xstrdup(val);
1362                }
1363        }
1364
1365        git_config_get_string("imap.user", &server.user);
1366        git_config_get_string("imap.pass", &server.pass);
1367        git_config_get_int("imap.port", &server.port);
1368        git_config_get_string("imap.tunnel", &server.tunnel);
1369        git_config_get_string("imap.authmethod", &server.auth_method);
1370}
1371
1372static int append_msgs_to_imap(struct imap_server_conf *server,
1373                               struct strbuf* all_msgs, int total)
1374{
1375        struct strbuf msg = STRBUF_INIT;
1376        struct imap_store *ctx = NULL;
1377        int ofs = 0;
1378        int r;
1379        int n = 0;
1380
1381        ctx = imap_open_store(server, server->folder);
1382        if (!ctx) {
1383                fprintf(stderr, "failed to open store\n");
1384                return 1;
1385        }
1386        ctx->name = server->folder;
1387
1388        fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1389        while (1) {
1390                unsigned percent = n * 100 / total;
1391
1392                fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1393
1394                if (!split_msg(all_msgs, &msg, &ofs))
1395                        break;
1396                if (server->use_html)
1397                        wrap_in_html(&msg);
1398                r = imap_store_msg(ctx, &msg);
1399                if (r != DRV_OK)
1400                        break;
1401                n++;
1402        }
1403        fprintf(stderr, "\n");
1404
1405        imap_close_store(ctx);
1406
1407        return 0;
1408}
1409
1410#ifdef USE_CURL_FOR_IMAP_SEND
1411static CURL *setup_curl(struct imap_server_conf *srvc, struct credential *cred)
1412{
1413        CURL *curl;
1414        struct strbuf path = STRBUF_INIT;
1415        char *uri_encoded_folder;
1416
1417        if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
1418                die("curl_global_init failed");
1419
1420        curl = curl_easy_init();
1421
1422        if (!curl)
1423                die("curl_easy_init failed");
1424
1425        server_fill_credential(&server, cred);
1426        curl_easy_setopt(curl, CURLOPT_USERNAME, server.user);
1427        curl_easy_setopt(curl, CURLOPT_PASSWORD, server.pass);
1428
1429        strbuf_addstr(&path, server.use_ssl ? "imaps://" : "imap://");
1430        strbuf_addstr(&path, server.host);
1431        if (!path.len || path.buf[path.len - 1] != '/')
1432                strbuf_addch(&path, '/');
1433
1434        uri_encoded_folder = curl_easy_escape(curl, server.folder, 0);
1435        if (!uri_encoded_folder)
1436                die("failed to encode server folder");
1437        strbuf_addstr(&path, uri_encoded_folder);
1438        curl_free(uri_encoded_folder);
1439
1440        curl_easy_setopt(curl, CURLOPT_URL, path.buf);
1441        strbuf_release(&path);
1442        curl_easy_setopt(curl, CURLOPT_PORT, server.port);
1443
1444        if (server.auth_method) {
1445#if LIBCURL_VERSION_NUM < 0x072200
1446                warning("No LOGIN_OPTIONS support in this cURL version");
1447#else
1448                struct strbuf auth = STRBUF_INIT;
1449                strbuf_addstr(&auth, "AUTH=");
1450                strbuf_addstr(&auth, server.auth_method);
1451                curl_easy_setopt(curl, CURLOPT_LOGIN_OPTIONS, auth.buf);
1452                strbuf_release(&auth);
1453#endif
1454        }
1455
1456        if (!server.use_ssl)
1457                curl_easy_setopt(curl, CURLOPT_USE_SSL, (long)CURLUSESSL_TRY);
1458
1459        curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, server.ssl_verify);
1460        curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, server.ssl_verify);
1461
1462        curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
1463
1464        curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
1465
1466        if (0 < verbosity || getenv("GIT_CURL_VERBOSE"))
1467                curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
1468        setup_curl_trace(curl);
1469
1470        return curl;
1471}
1472
1473static int curl_append_msgs_to_imap(struct imap_server_conf *server,
1474                                    struct strbuf* all_msgs, int total)
1475{
1476        int ofs = 0;
1477        int n = 0;
1478        struct buffer msgbuf = { STRBUF_INIT, 0 };
1479        CURL *curl;
1480        CURLcode res = CURLE_OK;
1481        struct credential cred = CREDENTIAL_INIT;
1482
1483        curl = setup_curl(server, &cred);
1484        curl_easy_setopt(curl, CURLOPT_READDATA, &msgbuf);
1485
1486        fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1487        while (1) {
1488                unsigned percent = n * 100 / total;
1489                int prev_len;
1490
1491                fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1492
1493                prev_len = msgbuf.buf.len;
1494                if (!split_msg(all_msgs, &msgbuf.buf, &ofs))
1495                        break;
1496                if (server->use_html)
1497                        wrap_in_html(&msgbuf.buf);
1498                lf_to_crlf(&msgbuf.buf);
1499
1500                curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE,
1501                                 (curl_off_t)(msgbuf.buf.len-prev_len));
1502
1503                res = curl_easy_perform(curl);
1504
1505                if(res != CURLE_OK) {
1506                        fprintf(stderr, "curl_easy_perform() failed: %s\n",
1507                                        curl_easy_strerror(res));
1508                        break;
1509                }
1510
1511                n++;
1512        }
1513        fprintf(stderr, "\n");
1514
1515        curl_easy_cleanup(curl);
1516        curl_global_cleanup();
1517
1518        if (cred.username) {
1519                if (res == CURLE_OK)
1520                        credential_approve(&cred);
1521#if LIBCURL_VERSION_NUM >= 0x070d01
1522                else if (res == CURLE_LOGIN_DENIED)
1523#else
1524                else
1525#endif
1526                        credential_reject(&cred);
1527        }
1528
1529        credential_clear(&cred);
1530
1531        return res != CURLE_OK;
1532}
1533#endif
1534
1535int cmd_main(int argc, const char **argv)
1536{
1537        struct strbuf all_msgs = STRBUF_INIT;
1538        int total;
1539        int nongit_ok;
1540
1541        setup_git_directory_gently(&nongit_ok);
1542        git_imap_config();
1543
1544        argc = parse_options(argc, (const char **)argv, "", imap_send_options, imap_send_usage, 0);
1545
1546        if (argc)
1547                usage_with_options(imap_send_usage, imap_send_options);
1548
1549#ifndef USE_CURL_FOR_IMAP_SEND
1550        if (use_curl) {
1551                warning("--curl not supported in this build");
1552                use_curl = 0;
1553        }
1554#elif defined(NO_OPENSSL)
1555        if (!use_curl) {
1556                warning("--no-curl not supported in this build");
1557                use_curl = 1;
1558        }
1559#endif
1560
1561        if (!server.port)
1562                server.port = server.use_ssl ? 993 : 143;
1563
1564        if (!server.folder) {
1565                fprintf(stderr, "no imap store specified\n");
1566                return 1;
1567        }
1568        if (!server.host) {
1569                if (!server.tunnel) {
1570                        fprintf(stderr, "no imap host specified\n");
1571                        return 1;
1572                }
1573                server.host = "tunnel";
1574        }
1575
1576        /* read the messages */
1577        if (read_message(stdin, &all_msgs)) {
1578                fprintf(stderr, "error reading input\n");
1579                return 1;
1580        }
1581
1582        if (all_msgs.len == 0) {
1583                fprintf(stderr, "nothing to send\n");
1584                return 1;
1585        }
1586
1587        total = count_messages(&all_msgs);
1588        if (!total) {
1589                fprintf(stderr, "no messages to send\n");
1590                return 1;
1591        }
1592
1593        /* write it to the imap server */
1594
1595        if (server.tunnel)
1596                return append_msgs_to_imap(&server, &all_msgs, total);
1597
1598#ifdef USE_CURL_FOR_IMAP_SEND
1599        if (use_curl)
1600                return curl_append_msgs_to_imap(&server, &all_msgs, total);
1601#endif
1602
1603        return append_msgs_to_imap(&server, &all_msgs, total);
1604}