src/libpwmd.c

   1 /* vim:tw=78:ts=8:sw=4:set ft=c:  */
   2 /*
   3     Copyright (C) 2006-2009 Ben Kibbey <bjk@luxsci.net>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02110-1301  USA
  18 */
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <err.h>
  23 #include <errno.h>
  24 #include <ctype.h>
  25 #include <string.h>
  26 #include <sys/socket.h>
  27 #include <sys/un.h>
  28 #include <signal.h>
  29 #include <stdarg.h>
  30 #include <string.h>
  31 #include <sys/wait.h>
  32 #include <fcntl.h>
  33 #include <pwd.h>
  34 #include <time.h>
  35 #include <sys/types.h>
  36 #include <limits.h>
  37 #include <sys/select.h>
  38 #include <netdb.h>
  39 #include <netinet/in.h>
  40 #include <sys/socket.h>
  41 #include <libpwmd.h>
  42
  43 #ifdef HAVE_CONFIG_H
  44 #include <config.h>
  45 #endif
  46
  47 #ifdef WITH_LIBPTH
  48 #include <pth.h>
  49 #endif
  50
  51 #ifdef WITH_TCP
  52 #define DNS_USE_GETTIMEOFDAY_FOR_ID 1
  53 #include <ares.h>
  54 #include <arpa/nameser.h>
  55 #endif
  56
  57 #ifdef HAVE_ASSUAN_H
  58 #include <assuan.h>
  59 #endif
  60
  61 #ifdef HAVE_SETLOCALE
  62 #include <locale.h>
  63 #endif
  64
  65 #include "gettext.h"
  66 #define N_(msgid)       dgettext("libpwmd", msgid)
  67
  68 #include "mem.h"
  69 #include "types.h"
  70
  71 #ifdef WITH_PINENTRY
  72 static pwm_t *gpwm;
  73 static int gelapsed, gtimeout;
  74 static gpg_error_t pinentry_command(pwm_t *pwm, char **result, const char *cmd);
  75 #endif
  76
  77 static char *_getpwuid(struct passwd *pwd)
  78 {
  79     size_t size = sysconf(_SC_GETPW_R_SIZE_MAX);
  80     struct passwd *result;
  81     char *buf;
  82     int n;
  83
  84     if (size == -1)
  85         size = 16384;
  86
  87     buf = pwmd_malloc(size);
  88
  89     if (!buf)
  90         return NULL;
  91
  92     n = getpwuid_r(getuid(), pwd, buf, size, &result);
  93
  94     if (n) {
  95         pwmd_free(buf);
  96         errno = n;
  97         return NULL;
  98     }
  99
 100     if (!result) {
 101         pwmd_free(buf);
 102         return NULL;
 103     }
 104
 105     errno = n;
 106     return buf;
 107 }
 108
 109 const char *_pwmd_strerror(gpg_error_t e)
 110 {
 111     gpg_err_code_t code = gpg_err_code(e);
 112
 113     if (code >= GPG_ERR_USER_1 && code < gpg_err_code(EPWMD_MAX)) {
 114         switch (code) {
 115             default:
 116                 return NULL;
 117             case GPG_ERR_USER_1:
 118                 return N_("Unknown error");
 119             case GPG_ERR_USER_2:
 120                 return N_("No cache slots available");
 121             case GPG_ERR_USER_3:
 122                 return N_("Recursion loop");
 123             case GPG_ERR_USER_4:
 124                 return N_("No file is open");
 125             case GPG_ERR_USER_5:
 126                 return N_("General LibXML error");
 127             case GPG_ERR_USER_6:
 128                 return N_("File modified");
 129             case GPG_ERR_USER_7:
 130                 return N_("Access denied");
 131         }
 132     }
 133
 134     return NULL;
 135 }
 136
 137 const char *pwmd_strerror(gpg_error_t e)
 138 {
 139     const char *p = _pwmd_strerror(e);
 140
 141     return p ? p : gpg_strerror(e);
 142 }
 143
 144 int pwmd_strerror_r(gpg_error_t e, char *buf, size_t size)
 145 {
 146     const char *p = _pwmd_strerror(e);
 147
 148     if (p) {
 149         snprintf(buf, size, "%s", p);
 150
 151         if (strlen(p) > size)
 152             return ERANGE;
 153
 154         return 0;
 155     }
 156
 157     return gpg_strerror_r(e, buf, size);
 158 }
 159
 160 gpg_error_t pwmd_init()
 161 {
 162     static int initialized;
 163
 164     if (initialized)
 165         return 0;
 166
 167 #ifndef MEM_DEBUG
 168     xmem_init();
 169 #endif
 170 #ifdef ENABLE_NLS
 171     bindtextdomain("libpwmd", LOCALEDIR);
 172 #endif
 173     gpg_err_init();
 174     assuan_set_malloc_hooks(pwmd_malloc, pwmd_realloc, pwmd_free);
 175     assuan_set_assuan_err_source(GPG_ERR_SOURCE_DEFAULT);
 176     initialized = 1;
 177     return 0;
 178 }
 179
 180 static gpg_error_t _socket_connect_finalize(pwm_t *pwm)
 181 {
 182     int active[2];
 183     int n = assuan_get_active_fds(pwm->ctx, 0, active, N_ARRAY(active));
 184
 185     pwm->fd = n <= 0 ? -1 : dup(active[0]);
 186 #ifdef WITH_PINENTRY
 187     pwm->pid = -1;
 188     pwm->pinentry_tries = 3;
 189 #endif
 190     assuan_set_pointer(pwm->ctx, pwm);
 191
 192     if (pwm->name)
 193         return pwmd_command(pwm, NULL, "OPTION CLIENT NAME=%s", pwm->name);
 194
 195     return 0;
 196 }
 197
 198 #ifdef WITH_TCP
 199 static int read_hook(assuan_context_t ctx, assuan_fd_t fd, void *data,
 200         size_t len, ssize_t *ret)
 201 {
 202     pwm_t *pwm = assuan_get_pointer(ctx);
 203
 204     if (!pwm || !pwm->tcp_conn)
 205 #ifdef WITH_LIBPTH
 206         *ret = pth_read((int)fd, data, len);
 207 #else
 208         *ret = read((int)fd, data, len);
 209 #endif
 210     else {
 211         do {
 212             *ret = libssh2_channel_read(pwm->tcp_conn->channel, data, len);
 213         } while (*ret == LIBSSH2_ERROR_EAGAIN);
 214     }
 215
 216     return *ret <= 0 ? 0 : 1;
 217 }
 218
 219 static int write_hook(assuan_context_t ctx, assuan_fd_t fd, const void *data,
 220         size_t len, ssize_t *ret)
 221 {
 222     pwm_t *pwm = assuan_get_pointer(ctx);
 223
 224     if (!pwm || !pwm->tcp_conn)
 225 #ifdef WITH_LIBPTH
 226         *ret = pth_write((int)fd, data, len);
 227 #else
 228         *ret = write((int)fd, data, len);
 229 #endif
 230     else {
 231         do {
 232             *ret = libssh2_channel_write(pwm->tcp_conn->channel, data, len);
 233         } while (*ret == LIBSSH2_ERROR_EAGAIN);
 234     }
 235
 236     return *ret <= 0 ? 0 : 1;
 237 }
 238
 239 static void _ssh_deinit(pwmd_tcp_conn_t *conn);
 240 static void free_tcp_conn(pwmd_tcp_conn_t *conn)
 241 {
 242     if (!conn)
 243         return;
 244
 245     if (conn->username) {
 246         pwmd_free(conn->username);
 247         conn->username = NULL;
 248     }
 249
 250     if (conn->known_hosts) {
 251         pwmd_free(conn->known_hosts);
 252         conn->known_hosts = NULL;
 253     }
 254
 255     if (conn->identity) {
 256         pwmd_free(conn->identity);
 257         conn->identity = NULL;
 258     }
 259
 260     if (conn->identity_pub) {
 261         pwmd_free(conn->identity_pub);
 262         conn->identity_pub = NULL;
 263     }
 264
 265     if (conn->host) {
 266         pwmd_free(conn->host);
 267         conn->host = NULL;
 268     }
 269
 270     if (conn->hostkey) {
 271         pwmd_free(conn->hostkey);
 272         conn->hostkey = NULL;
 273     }
 274
 275     if (conn->chan) {
 276         ares_destroy(conn->chan);
 277         conn->chan = NULL;
 278     }
 279
 280     if (conn->he) {
 281         ares_free_hostent(conn->he);
 282         conn->he = NULL;
 283     }
 284
 285     if (conn->fd >= 0) {
 286         close(conn->fd);
 287         conn->fd = -1;
 288     }
 289
 290     if (conn->session)
 291         _ssh_deinit(conn);
 292     else
 293         pwmd_free(conn);
 294 }
 295
 296 static void _ssh_deinit(pwmd_tcp_conn_t *conn)
 297 {
 298     if (!conn)
 299         return;
 300
 301     if (conn->channel)
 302         libssh2_channel_free(conn->channel);
 303
 304     if (conn->session) {
 305         libssh2_session_disconnect(conn->session, "Bye!");
 306         libssh2_session_free(conn->session);
 307     }
 308
 309     conn->session = NULL;
 310     conn->channel = NULL;
 311     free_tcp_conn(conn);
 312 }
 313
 314 static void _ssh_assuan_deinit(assuan_context_t ctx)
 315 {
 316     pwm_t *pwm = assuan_get_pointer(ctx);
 317
 318     _ssh_deinit(pwm->tcp_conn);
 319     pwm->tcp_conn = NULL;
 320 }
 321
 322 /*
 323  * Sets common options from both pwmd_tcp_connect() and
 324  * pwmd_tcp_connect_async().
 325  */
 326 static gpg_error_t init_tcp_conn(pwmd_tcp_conn_t **dst, const char *host,
 327         int port, const char *identity, const char *user, const char *hosts,
 328         int get)
 329 {
 330     pwmd_tcp_conn_t *conn;
 331     gpg_error_t rc = 0;
 332
 333     if (get) {
 334         if (!host)
 335             return GPG_ERR_INV_ARG;
 336     }
 337     else {
 338         if (!host || !identity || !hosts)
 339             return GPG_ERR_INV_ARG;
 340     }
 341
 342     conn = pwmd_calloc(1, sizeof(pwmd_tcp_conn_t));
 343
 344     if (!conn)
 345         return gpg_error_from_errno(ENOMEM);
 346
 347     conn->port = port == -1 ? 22 : port;
 348     conn->host = pwmd_strdup(host);
 349
 350     if (!conn->host) {
 351         rc = gpg_error_from_errno(ENOMEM);
 352         goto fail;
 353     }
 354
 355     if (!get) {
 356         struct passwd pw;
 357         char *pwbuf = _getpwuid(&pw);
 358
 359         if (!pwbuf) {
 360             rc = gpg_error_from_errno(errno);
 361             goto fail;
 362         }
 363
 364         conn->username = pwmd_strdup(user ? user : pw.pw_name);
 365         pwmd_free(pwbuf);
 366
 367         if (!conn->username) {
 368             rc = gpg_error_from_errno(ENOMEM);
 369             goto fail;
 370         }
 371
 372         conn->identity = pwmd_strdup(identity);
 373
 374         if (!conn->identity) {
 375             rc = gpg_error_from_errno(ENOMEM);
 376             goto fail;
 377         }
 378
 379         conn->identity_pub = pwmd_malloc(strlen(conn->identity)+5);
 380
 381         if (!conn->identity_pub) {
 382             rc = gpg_error_from_errno(ENOMEM);
 383             goto fail;
 384         }
 385
 386         sprintf(conn->identity_pub, "%s.pub", conn->identity);
 387         conn->known_hosts = pwmd_strdup(hosts);
 388
 389         if (!conn->known_hosts) {
 390             rc = gpg_error_from_errno(ENOMEM);
 391             goto fail;
 392         }
 393     }
 394
 395     *dst = conn;
 396     return 0;
 397
 398 fail:
 399     free_tcp_conn(conn);
 400     return rc;
 401 }
 402
 403 static gpg_error_t do_connect(pwm_t *pwm, int prot, void *addr)
 404 {
 405     struct sockaddr_in their_addr;
 406
 407     pwm->tcp_conn->fd = socket(prot, SOCK_STREAM, 0);
 408
 409     if (pwm->tcp_conn->fd == -1)
 410         return gpg_error_from_syserror();
 411
 412     if (pwm->tcp_conn->async)
 413         fcntl(pwm->tcp_conn->fd, F_SETFL, O_NONBLOCK);
 414
 415     pwm->cmd = ASYNC_CMD_CONNECT;
 416     their_addr.sin_family = prot;
 417     their_addr.sin_port = htons(pwm->tcp_conn->port);
 418     their_addr.sin_addr = *((struct in_addr *)addr);
 419     memset(their_addr.sin_zero, '\0', sizeof their_addr.sin_zero);
 420
 421 #ifdef WITH_LIBPTH
 422     if (pth_connect(pwm->tcp_conn->fd, (struct sockaddr *)&their_addr,
 423                 sizeof(their_addr)) == -1)
 424 #else
 425     if (connect(pwm->tcp_conn->fd, (struct sockaddr *)&their_addr,
 426                 sizeof(their_addr)) == -1)
 427 #endif
 428         return gpg_error_from_syserror();
 429
 430     return 0;
 431 }
 432
 433 static gpg_error_t ares_error_to_pwmd(int status)
 434 {
 435     if (status != ARES_SUCCESS)
 436         warnx("%s", ares_strerror(status));
 437
 438     switch (status) {
 439         case ARES_ENODATA:
 440         case ARES_EFORMERR:
 441         case ARES_ENOTFOUND:
 442             return GPG_ERR_UNKNOWN_HOST;
 443         case ARES_ESERVFAIL:
 444              return GPG_ERR_EHOSTDOWN;
 445         case ARES_ETIMEOUT:
 446             return GPG_ERR_TIMEOUT;
 447         case ARES_ENOMEM:
 448             return gpg_error_from_errno(ENOMEM);
 449         case ARES_ECONNREFUSED:
 450             return GPG_ERR_ECONNREFUSED;
 451         default:
 452             /* FIXME ??? */
 453             return GPG_ERR_EHOSTUNREACH;
 454     }
 455
 456     return ARES_SUCCESS;
 457 }
 458
 459 static void dns_resolve_cb(void *arg, int status, int timeouts,
 460         unsigned char *abuf, int alen)
 461 {
 462     pwm_t *pwm = arg;
 463     int rc;
 464     struct hostent *he;
 465
 466     if (status == ARES_EDESTRUCTION)
 467         return;
 468
 469     if (status != ARES_SUCCESS) {
 470         pwm->tcp_conn->rc = ares_error_to_pwmd(status);
 471         return;
 472     }
 473
 474     //FIXME localhost. works with ipv4. maybe local system config error
 475     /* Check for an IPv6 address first. */
 476     rc = ares_parse_a_reply(abuf, alen, &he, NULL, NULL);
 477
 478     if (rc != ARES_SUCCESS) {
 479         if (rc != ARES_ENODATA) {
 480             pwm->tcp_conn->rc = ares_error_to_pwmd(status);
 481             return;
 482         }
 483
 484         rc = ares_parse_aaaa_reply(abuf, alen, &he, NULL, NULL);
 485
 486         if (rc != ARES_SUCCESS) {
 487             pwm->tcp_conn->rc = ares_error_to_pwmd(status);
 488             return;
 489         }
 490     }
 491
 492     pwm->tcp_conn->he = he;
 493     pwm->tcp_conn->rc = do_connect(pwm, he->h_addrtype, he->h_addr);
 494 }
 495
 496 static gpg_error_t _do_pwmd_tcp_connect_async(pwm_t *pwm, const char *host,
 497         int port, const char *identity, const char *user,
 498         const char *known_hosts, pwmd_async_cmd_t which)
 499 {
 500     pwmd_tcp_conn_t *conn;
 501     gpg_error_t rc;
 502
 503     rc = init_tcp_conn(&conn, host, port, identity, user, known_hosts,
 504             which == ASYNC_CMD_HOSTKEY ? 1 : 0);
 505
 506     if (rc)
 507         return rc;
 508
 509     conn->async = 1;
 510     pwm->tcp_conn = conn;
 511     pwm->tcp_conn->cmd = which;
 512
 513     if (pwm->tcp_conn->cmd == ASYNC_CMD_HOSTKEY)
 514         pwm->tcp_conn->get_only = 1;
 515
 516     pwm->cmd = ASYNC_CMD_DNS;
 517     pwm->state = ASYNC_PROCESS;
 518     ares_init(&pwm->tcp_conn->chan);
 519     ares_query(pwm->tcp_conn->chan, pwm->tcp_conn->host, ns_c_any, ns_t_any,
 520             dns_resolve_cb, pwm);
 521     return 0;
 522 }
 523
 524 gpg_error_t pwmd_tcp_connect_async(pwm_t *pwm, const char *host, int port,
 525         const char *identity, const char *user, const char *known_hosts)
 526 {
 527     return _do_pwmd_tcp_connect_async(pwm, host, port, identity, user,
 528             known_hosts, ASYNC_CMD_CONNECT);
 529 }
 530
 531 static void *_ssh_malloc(size_t size, void **data)
 532 {
 533     return pwmd_malloc(size);
 534 }
 535
 536 static void _ssh_free(void *ptr, void **data)
 537 {
 538     pwmd_free(ptr);
 539 }
 540
 541 static void *_ssh_realloc(void *ptr, size_t size, void **data)
 542 {
 543     return pwmd_realloc(ptr, size);
 544 }
 545
 546 static char *to_hex(const char *str, size_t slen)
 547 {
 548     int i;
 549     char *buf = pwmd_malloc(slen*2+1);
 550
 551     if (!buf)
 552         return NULL;
 553
 554     for (i = 0, buf[0] = 0; i < slen; i++) {
 555         char tmp[3];
 556
 557         sprintf(tmp, "%02x", (unsigned char)str[i]);
 558         strcat(buf, tmp);
 559     }
 560
 561     return buf;
 562 }
 563
 564 static int verify_host_key(pwm_t *pwm)
 565 {
 566     FILE *fp = fopen(pwm->tcp_conn->known_hosts, "r");
 567     char *buf, *p;
 568
 569     if (!fp)
 570         return 1;
 571
 572     buf = pwmd_malloc(LINE_MAX);
 573
 574     if (!buf)
 575         goto fail;
 576
 577     while ((p = fgets(buf, LINE_MAX, fp))) {
 578         if (*p == '#' || isspace(*p))
 579             continue;
 580
 581         if (p[strlen(p)-1] == '\n')
 582             p[strlen(p)-1] = 0;
 583
 584         if (!strcmp(buf, pwm->tcp_conn->hostkey))
 585             goto done;
 586     }
 587
 588 fail:
 589     if (buf)
 590         pwmd_free(buf);
 591
 592     fclose(fp);
 593     return 1;
 594
 595 done:
 596     pwmd_free(buf);
 597     fclose(fp);
 598     return 0;
 599 }
 600
 601 static gpg_error_t authenticate_ssh(pwm_t *pwm)
 602 {
 603     const char *fp = libssh2_hostkey_hash(pwm->tcp_conn->session,
 604             LIBSSH2_HOSTKEY_HASH_SHA1);
 605     char *userauth;
 606
 607     pwm->tcp_conn->hostkey = to_hex(fp, 20);
 608
 609     if (!pwm->tcp_conn->hostkey)
 610         return gpg_error_from_errno(ENOMEM);
 611
 612     if (pwm->tcp_conn->get_only)
 613         return 0;
 614
 615     if (!fp || verify_host_key(pwm))
 616         return GPG_ERR_CHECKSUM;
 617
 618     userauth = libssh2_userauth_list(pwm->tcp_conn->session,
 619             pwm->tcp_conn->username, strlen(pwm->tcp_conn->username));
 620
 621     if (!userauth || !strstr(userauth, "publickey"))
 622         return GPG_ERR_BAD_PIN_METHOD;
 623
 624     if (libssh2_userauth_publickey_fromfile(pwm->tcp_conn->session,
 625                 pwm->tcp_conn->username, pwm->tcp_conn->identity_pub,
 626                 pwm->tcp_conn->identity, NULL))
 627         return GPG_ERR_BAD_SECKEY;
 628
 629     return 0;
 630 }
 631
 632 static gpg_error_t setup_tcp_session(pwm_t *pwm)
 633 {
 634     assuan_context_t ctx;
 635     struct assuan_io_hooks io_hooks = {read_hook, write_hook};
 636     gpg_error_t rc;
 637
 638     pwm->tcp_conn->session = libssh2_session_init_ex(_ssh_malloc, _ssh_free,
 639             _ssh_realloc, NULL);
 640
 641     if (!pwm->tcp_conn->session) {
 642         rc = gpg_error_from_errno(ENOMEM);
 643         goto fail;
 644     }
 645
 646     if (libssh2_session_startup(pwm->tcp_conn->session, pwm->tcp_conn->fd)) {
 647         rc = GPG_ERR_ASSUAN_SERVER_FAULT;
 648         goto fail;
 649     }
 650
 651     rc = authenticate_ssh(pwm);
 652
 653     if (rc)
 654         goto fail;
 655
 656     /* pwmd_get_hostkey(). */
 657     if (pwm->tcp_conn->get_only) {
 658         pwm->result = pwmd_strdup(pwm->tcp_conn->hostkey);
 659
 660         if (!pwm->result) {
 661             rc = gpg_error_from_errno(ENOMEM);
 662             goto fail;
 663         }
 664
 665         return 0;
 666     }
 667
 668     pwm->tcp_conn->channel = libssh2_channel_open_session(pwm->tcp_conn->session);
 669
 670     if (!pwm->tcp_conn->channel) {
 671         rc = GPG_ERR_ASSUAN_SERVER_FAULT;
 672         goto fail;
 673     }
 674
 675     if (libssh2_channel_shell(pwm->tcp_conn->channel)) {
 676         rc = GPG_ERR_ASSUAN_SERVER_FAULT;
 677         goto fail;
 678     }
 679
 680     assuan_set_io_hooks(&io_hooks);
 681     rc = assuan_socket_connect_fd(&ctx, pwm->tcp_conn->fd, 0, pwm);
 682
 683     if (rc)
 684         goto fail;
 685
 686     assuan_set_finish_handler(ctx, _ssh_assuan_deinit);
 687     pwm->ctx = ctx;
 688     return _socket_connect_finalize(pwm);
 689
 690 fail:
 691     free_tcp_conn(pwm->tcp_conn);
 692     pwm->tcp_conn = NULL;
 693     return rc;
 694 }
 695
 696 static gpg_error_t _do_pwmd_tcp_connect(pwm_t *pwm, const char *host, int port,
 697         const char *identity, const char *user, const char *known_hosts, int get)
 698 {
 699     pwmd_tcp_conn_t *conn;
 700     gpg_error_t rc;
 701
 702     rc = init_tcp_conn(&conn, host, port, identity, user, known_hosts, get);
 703
 704     if (rc)
 705         return rc;
 706
 707     pwm->tcp_conn = conn;
 708     pwm->tcp_conn->get_only = get;
 709     pwm->cmd = ASYNC_CMD_DNS;
 710     ares_init(&pwm->tcp_conn->chan);
 711     ares_query(pwm->tcp_conn->chan, pwm->tcp_conn->host, ns_c_any, ns_t_any,
 712             dns_resolve_cb, pwm);
 713
 714     /* dns_resolve_cb() may have already been called. */
 715     if (pwm->tcp_conn->rc) {
 716         rc = pwm->tcp_conn->rc;
 717         goto fail;
 718     }
 719
 720     /*
 721      * Fake a blocking DNS lookup. libcares does a better job than
 722      * getaddrinfo().
 723      */
 724     do {
 725         fd_set rfds, wfds;
 726         int n;
 727         struct timeval tv;
 728
 729         FD_ZERO(&rfds);
 730         FD_ZERO(&wfds);
 731         n = ares_fds(pwm->tcp_conn->chan, &rfds, &wfds);
 732         ares_timeout(pwm->tcp_conn->chan, NULL, &tv);
 733 #ifdef WITH_LIBPTH
 734         n = pth_select(n, &rfds, &wfds, NULL, &tv);
 735 #else
 736         n = select(n, &rfds, &wfds, NULL, &tv);
 737 #endif
 738
 739         if (n == -1) {
 740             rc = gpg_error_from_syserror();
 741             goto fail;
 742         }
 743         else if (n == 0) {
 744             rc = GPG_ERR_TIMEOUT;
 745             goto fail;
 746         }
 747
 748         ares_process(pwm->tcp_conn->chan, &rfds, &wfds);
 749
 750         if (pwm->tcp_conn->rc)
 751             break;
 752     } while (pwm->cmd == ASYNC_CMD_DNS);
 753
 754     if (pwm->tcp_conn->rc) {
 755         rc = pwm->tcp_conn->rc;
 756         goto fail;
 757     }
 758
 759     return setup_tcp_session(pwm);
 760
 761 fail:
 762     return rc;
 763 }
 764
 765 gpg_error_t pwmd_tcp_connect(pwm_t *pwm, const char *host, int port,
 766         const char *identity, const char *user, const char *known_hosts)
 767 {
 768     return _do_pwmd_tcp_connect(pwm, host, port, identity, user, known_hosts, 0);
 769 }
 770
 771 /* Must free the result with pwmd_free(). */
 772 gpg_error_t pwmd_get_hostkey(const char *host, int port, char **result)
 773 {
 774     char *hostkey;
 775     pwm_t *pwm = pwmd_new(NULL);
 776     gpg_error_t rc;
 777
 778     if (!pwm)
 779         return gpg_error_from_errno(ENOMEM);
 780
 781     rc = _do_pwmd_tcp_connect(pwm, host, port, NULL, NULL, NULL, 1);
 782
 783     if (rc) {
 784         pwmd_close(pwm);
 785         return rc;
 786     }
 787
 788     hostkey = pwmd_strdup(pwm->tcp_conn->hostkey);
 789
 790     if (!hostkey)
 791         rc = gpg_error_from_errno(ENOMEM);
 792
 793     pwmd_close(pwm);
 794     *result = hostkey;
 795     return rc;
 796 }
 797
 798 gpg_error_t pwmd_get_hostkey_async(pwm_t *pwm, const char *host, int port)
 799 {
 800     return _do_pwmd_tcp_connect_async(pwm, host, port, NULL, NULL, NULL,
 801             ASYNC_CMD_HOSTKEY);
 802 }
 803 #endif
 804
 805 gpg_error_t pwmd_connect(pwm_t *pwm, const char *path)
 806 {
 807     char *socketpath = NULL;
 808     assuan_context_t ctx;
 809     struct passwd pw;
 810     char *pwbuf = _getpwuid(&pw);
 811     gpg_error_t rc;
 812
 813     if (!pwbuf)
 814         return gpg_error_from_errno(errno);
 815
 816     if (!path) {
 817         socketpath = (char *)pwmd_malloc(strlen(pw.pw_dir) + strlen("/.pwmd/socket") + 1);
 818         sprintf(socketpath, "%s/.pwmd/socket", pw.pw_dir);
 819     }
 820     else
 821         socketpath = pwmd_strdup(path);
 822
 823     pwmd_free(pwbuf);
 824     rc = assuan_socket_connect_ext(&ctx, socketpath, -1, 0);
 825     pwmd_free(socketpath);
 826
 827     if (rc)
 828         return rc;
 829
 830     pwm->ctx = ctx;
 831     return _socket_connect_finalize(pwm);
 832 }
 833
 834 void pwmd_close(pwm_t *pwm)
 835 {
 836     if (!pwm)
 837         return;
 838
 839     if (pwm->ctx)
 840         assuan_disconnect(pwm->ctx);
 841
 842     if (pwm->password)
 843         pwmd_free(pwm->password);
 844
 845     if (pwm->title)
 846         pwmd_free(pwm->title);
 847
 848     if (pwm->desc)
 849         pwmd_free(pwm->desc);
 850
 851     if (pwm->prompt)
 852         pwmd_free(pwm->prompt);
 853
 854     if (pwm->pinentry_tty)
 855         pwmd_free(pwm->pinentry_tty);
 856
 857     if (pwm->pinentry_display)
 858         pwmd_free(pwm->pinentry_display);
 859
 860     if (pwm->pinentry_term)
 861         pwmd_free(pwm->pinentry_term);
 862
 863     if (pwm->lcctype)
 864         pwmd_free(pwm->lcctype);
 865
 866     if (pwm->lcmessages)
 867         pwmd_free(pwm->lcmessages);
 868
 869     if (pwm->filename)
 870         pwmd_free(pwm->filename);
 871
 872     if (pwm->name)
 873         pwmd_free(pwm->name);
 874
 875 #ifdef WITH_TCP
 876     if (pwm->tcp_conn)
 877         free_tcp_conn(pwm->tcp_conn);
 878 #endif
 879
 880     pwmd_free(pwm);
 881 }
 882
 883 static int mem_realloc_cb(void *data, const void *buffer, size_t len)
 884 {
 885     membuf_t *mem = (membuf_t *)data;
 886     void *p;
 887
 888     if (!buffer)
 889         return 0;
 890
 891     if ((p = pwmd_realloc(mem->buf, mem->len + len)) == NULL)
 892         return 1;
 893
 894     mem->buf = p;
 895     memcpy((char *)mem->buf + mem->len, buffer, len);
 896     mem->len += len;
 897     return 0;
 898 }
 899
 900 static int _inquire_cb(void *data, const char *keyword)
 901 {
 902     pwm_t *pwm = (pwm_t *)data;
 903     gpg_error_t rc = 0;
 904     int flags = fcntl(pwm->fd, F_GETFL);
 905
 906     /* Shouldn't get this far without a callback. */
 907     if (!pwm->inquire_func)
 908         return GPG_ERR_INV_ARG;
 909
 910     /*
 911      * Since the socket file descriptor is probably set to non-blocking, set to
 912      * blocking to prevent GPG_ERR_EAGAIN errors. This should be fixes when
 913      * asynchronous INQUIRE is supported by either libassuan or a later
 914      * libpwmd.
 915      */
 916     fcntl(pwm->fd, F_SETFL, 0);
 917
 918     for (;;) {
 919         char *result = NULL;
 920         size_t len;
 921         gpg_error_t arc;
 922
 923         rc = pwm->inquire_func(pwm->inquire_data, keyword, rc, &result, &len);
 924         rc = gpg_err_code(rc);
 925
 926         if (rc == GPG_ERR_EOF || !rc) {
 927             if (len <= 0 || !result || !*result) {
 928                 rc = 0;
 929                 break;
 930             }
 931
 932             arc = assuan_send_data(pwm->ctx, result, len);
 933
 934             if (rc == GPG_ERR_EOF) {
 935                 rc = arc;
 936                 break;
 937             }
 938
 939             rc = arc;
 940         }
 941         else if (rc)
 942             break;
 943     }
 944
 945     fcntl(pwm->fd, F_SETFL, flags);
 946     return rc;
 947 }
 948
 949 static gpg_error_t do_nb_command(pwm_t *pwm, const char *cmd, const char *arg)
 950 {
 951     char *buf;
 952     gpg_error_t rc;
 953     size_t len = strlen(cmd) + 2;
 954
 955     len += arg ? strlen(arg) : 0;
 956
 957     if (pwm->state == ASYNC_DONE)
 958         pwm->state = ASYNC_INIT;
 959
 960     if (pwm->state != ASYNC_INIT)
 961         return GPG_ERR_INV_STATE;
 962
 963     buf = (char *)pwmd_malloc(len);
 964
 965     if (!buf) {
 966         rc = gpg_error_from_errno(ENOMEM);
 967         goto fail;
 968     }
 969
 970     snprintf(buf, len, "%s %s", cmd, arg ? arg : "");
 971     rc = assuan_write_line(pwm->ctx, buf);
 972     pwmd_free(buf);
 973
 974     if (!rc)
 975         pwm->state = ASYNC_PROCESS;
 976
 977 fail:
 978     return rc;
 979 }
 980
 981 gpg_error_t pwmd_open_async(pwm_t *pwm, const char *filename)
 982 {
 983     if (!pwm || !filename)
 984         return GPG_ERR_INV_ARG;
 985
 986     /* For pinentry retries. */
 987     if (!pwm->is_open_cmd) {
 988         if (pwm->filename)
 989             pwmd_free(pwm->filename);
 990
 991         pwm->filename = pwmd_strdup(filename);
 992     }
 993
 994     pwm->is_open_cmd = 1;
 995     pwm->cmd = ASYNC_CMD_OPEN;
 996     return do_nb_command(pwm, "OPEN", filename);
 997 }
 998
 999 gpg_error_t pwmd_save_async(pwm_t *pwm)
1000 {
1001     if (!pwm)
1002         return GPG_ERR_INV_ARG;
1003
1004     pwm->cmd = ASYNC_CMD_SAVE;
1005     return do_nb_command(pwm, "SAVE", NULL);
1006 }
1007
1008 static gpg_error_t parse_assuan_line(pwm_t *pwm)
1009 {
1010     gpg_error_t rc;
1011     char *line;
1012     size_t len;
1013
1014     rc = assuan_read_line(pwm->ctx, &line, &len);
1015
1016     if (!rc) {
1017         if (line[0] == 'O' && line[1] == 'K' &&
1018                 (line[2] == 0 || line[2] == ' ')) {
1019             pwm->state = ASYNC_DONE;
1020         }
1021         else if (line[0] == '#') {
1022         }
1023         else if (line[0] == 'S' && (line[1] == 0 || line[1] == ' ')) {
1024             if (pwm->status_func) {
1025                 pwm->status_func(pwm->status_data,
1026                         line[1] == 0 ? line+1 : line+2);
1027             }
1028         }
1029         else if (line[0] == 'E' && line[1] == 'R' && line[2] == 'R' &&
1030                 (line[3] == 0 || line[3] == ' ')) {
1031             line += 4;
1032             rc = atoi(line);
1033             pwm->state = ASYNC_DONE;
1034         }
1035     }
1036
1037     return rc;
1038 }
1039
1040 gpg_error_t pwmd_pending_line(pwm_t *pwm)
1041 {
1042     if (!pwm)
1043         return GPG_ERR_INV_ARG;
1044
1045     if (!pwm->ctx)
1046         return GPG_ERR_INV_STATE;
1047
1048     return assuan_pending_line(pwm->ctx) ? 0 : GPG_ERR_NO_DATA;
1049 }
1050
1051 static pwmd_async_t reset_async(pwm_t *pwm, int done)
1052 {
1053     pwm->state = ASYNC_INIT;
1054     pwm->cmd = ASYNC_CMD_NONE;
1055     pwm->ntries = 0;
1056 #ifdef WITH_PINENTRY
1057     pwm->is_open_cmd = 0;
1058
1059     if (pwm->nb_fd != -1) {
1060         close(pwm->nb_fd);
1061         pwm->nb_fd = -1;
1062     }
1063 #endif
1064 #ifdef WITH_TCP
1065     if (done && pwm->tcp_conn && pwm->tcp_conn->fd != -1) {
1066         close(pwm->tcp_conn->fd);
1067         pwm->tcp_conn->fd = -1;
1068     }
1069 #endif
1070
1071     return ASYNC_DONE;
1072 };
1073
1074 pwmd_async_t pwmd_process(pwm_t *pwm, gpg_error_t *rc, char **result)
1075 {
1076     fd_set fds;
1077     int n;
1078     struct timeval tv = {0, 0};
1079
1080     *rc = 0;
1081
1082     if (!pwm) {
1083         *rc = GPG_ERR_INV_ARG;
1084         return ASYNC_DONE;
1085     }
1086
1087     /* When not in a command, this will let libassuan process status messages
1088      * by calling PWMD_OPTION_STATUS_FUNC. The client can poll the file
1089      * descriptor returned by pwmd_get_fd() to determine when this should be
1090      * called or call pwmd_pending_line() to determine whether a buffered line
1091      * needs to be processed. */
1092     if (pwm->cmd == ASYNC_CMD_NONE) {
1093         *rc = assuan_command(pwm, pwm->ctx, NULL, "NOP");
1094         return pwm->state;
1095     }
1096
1097     /* Fixes pwmd_open/save_async2() when there is a cached or new file. */
1098     if (pwm->state == ASYNC_DONE) {
1099         reset_async(pwm, 0);
1100         return ASYNC_DONE;
1101     }
1102
1103     if (pwm->state != ASYNC_PROCESS) {
1104         *rc = GPG_ERR_INV_STATE;
1105         return ASYNC_DONE;
1106     }
1107
1108 #ifdef WITH_TCP
1109     if (pwm->cmd == ASYNC_CMD_DNS) {
1110         fd_set rfds, wfds;
1111
1112         if (pwm->tcp_conn->rc) {
1113             *rc = pwm->tcp_conn->rc;
1114             reset_async(pwm, 1);
1115             return ASYNC_DONE;
1116         }
1117
1118         FD_ZERO(&rfds);
1119         FD_ZERO(&wfds);
1120         n = ares_fds(pwm->tcp_conn->chan, &rfds, &wfds);
1121
1122         /* Shouldn't happen. */
1123         if (!n)
1124             return pwm->state;
1125
1126 #ifdef WITH_LIBPTH
1127         n = pth_select(n, &rfds, &wfds, NULL, &tv);
1128 #else
1129         n = select(n, &rfds, &wfds, NULL, &tv);
1130 #endif
1131
1132         if (n > 0)
1133             ares_process(pwm->tcp_conn->chan, &rfds, &wfds);
1134
1135         return pwm->state;
1136     }
1137     else if (pwm->cmd == ASYNC_CMD_CONNECT) {
1138         if (pwm->tcp_conn->rc == GPG_ERR_EINPROGRESS) {
1139             int ret;
1140             socklen_t len = sizeof(int);
1141
1142             FD_ZERO(&fds);
1143             FD_SET(pwm->tcp_conn->fd, &fds);
1144 #ifdef WITH_LIBPTH
1145             n = pth_select(pwm->tcp_conn->fd+1, NULL, &fds, NULL, &tv);
1146 #else
1147             n = select(pwm->tcp_conn->fd+1, NULL, &fds, NULL, &tv);
1148 #endif
1149
1150             if (!n || !FD_ISSET(pwm->tcp_conn->fd, &fds))
1151                 return pwm->state;
1152             else if (n == -1) {
1153                 *rc = gpg_error_from_syserror();
1154                 reset_async(pwm, 1);
1155                 return ASYNC_DONE;
1156             }
1157
1158             ret = getsockopt(pwm->tcp_conn->fd, SOL_SOCKET, SO_ERROR, &n, &len);
1159
1160             if (ret || n) {
1161                 *rc = ret ? gpg_error_from_syserror() : gpg_error_from_errno(n);
1162                 reset_async(pwm, 1);
1163                 return ASYNC_DONE;
1164             }
1165         }
1166         else if (pwm->tcp_conn->rc) {
1167             *rc = pwm->tcp_conn->rc;
1168             reset_async(pwm, 1);
1169             return ASYNC_DONE;
1170         }
1171
1172         fcntl(pwm->tcp_conn->fd, F_SETFL, 0);
1173         *rc = setup_tcp_session(pwm);
1174
1175         if (!*rc) {
1176             switch (pwm->tcp_conn->cmd) {
1177                 case ASYNC_CMD_HOSTKEY:
1178                     if (!*rc)
1179                         *result = pwm->result;
1180                     break;
1181                 default:
1182                     break;
1183             }
1184         }
1185
1186         return reset_async(pwm, *rc ? 1 : 0);
1187     }
1188 #endif
1189
1190 #ifdef WITH_PINENTRY
1191     if (pwm->cmd == ASYNC_CMD_OPEN2 || pwm->cmd == ASYNC_CMD_SAVE2) {
1192         if (pwm->nb_fd == -1) {
1193             *rc = GPG_ERR_INV_STATE;
1194             return reset_async(pwm, 1);
1195         }
1196
1197         FD_ZERO(&fds);
1198         FD_SET(pwm->nb_fd, &fds);
1199 #ifdef WITH_LIBPTH
1200         n = pth_select(pwm->nb_fd+1, &fds, NULL, NULL, &tv);
1201 #else
1202         n = select(pwm->nb_fd+1, &fds, NULL, NULL, &tv);
1203 #endif
1204         if (n == -1) {
1205             *rc = gpg_error_from_syserror();
1206             return reset_async(pwm, pwm->cmd == ASYNC_CMD_OPEN2 ? 1 : 0);
1207         }
1208
1209         if (n > 0) {
1210             pwmd_nb_status_t nb;
1211             size_t len = read(pwm->nb_fd, &nb, sizeof(nb));
1212
1213             *rc = nb.error;
1214             return reset_async(pwm, pwm->cmd == ASYNC_CMD_OPEN2 ? 1 : 0);
1215         }
1216
1217         return pwm->state;
1218     }
1219 #endif
1220
1221     if (pwm->fd < 0) {
1222         *rc = GPG_ERR_INV_STATE;
1223         return reset_async(pwm, 1);
1224     }
1225
1226     /* This is for the non-blocking OPEN and SAVE commands. */
1227     FD_ZERO(&fds);
1228     FD_SET(pwm->fd, &fds);
1229 #ifdef WITH_LIBPTH
1230     n = pth_select(pwm->fd+1, &fds, NULL, NULL, &tv);
1231 #else
1232     n = select(pwm->fd+1, &fds, NULL, NULL, &tv);
1233 #endif
1234
1235     if (n == -1) {
1236         *rc = gpg_error_from_syserror();
1237         return reset_async(pwm, 0);
1238     }
1239
1240     if (n > 0) {
1241         if (FD_ISSET(pwm->fd, &fds)) {
1242             *rc = parse_assuan_line(pwm);
1243
1244             if (*rc)
1245                 return reset_async(pwm, 0);
1246         }
1247     }
1248
1249     while (!*rc && assuan_pending_line(pwm->ctx))
1250         *rc = parse_assuan_line(pwm);
1251
1252     if (*rc)
1253         return reset_async(pwm, 0);
1254
1255     /* For pinentry retries. */
1256     if (pwm->is_open_cmd && gpg_err_code(*rc) == EPWMD_BADKEY &&
1257             ++pwm->ntries < pwm->pinentry_tries) {
1258         pwm->state = ASYNC_INIT;
1259         *rc = pwmd_open_async(pwm, pwm->filename);
1260     }
1261
1262     if (*rc)
1263         return reset_async(pwm, 1);
1264
1265     if (pwm->state == ASYNC_DONE) {
1266         reset_async(pwm, 0);
1267         return ASYNC_DONE;
1268     }
1269
1270     return pwm->state;
1271 }
1272
1273 static gpg_error_t assuan_command(pwm_t *pwm, assuan_context_t ctx,
1274         char **result, const char *cmd)
1275 {
1276     membuf_t data;
1277     gpg_error_t rc;
1278
1279     data.len = 0;
1280     data.buf = NULL;
1281
1282     rc = assuan_transact(ctx, cmd, mem_realloc_cb, &data, _inquire_cb, pwm,
1283             pwm->status_func, pwm->status_data);
1284
1285     if (rc) {
1286         if (data.buf) {
1287             pwmd_free(data.buf);
1288             data.buf = NULL;
1289         }
1290     }
1291     else {
1292         if (data.buf) {
1293             mem_realloc_cb(&data, "", 1);
1294
1295             if (!result) {
1296                 pwmd_free(data.buf);
1297                 rc = GPG_ERR_INV_ARG;
1298             }
1299             else
1300                 *result = (char *)data.buf;
1301         }
1302     }
1303
1304     return gpg_err_code(rc);
1305 }
1306
1307 gpg_error_t pwmd_inquire(pwm_t *pwm, const char *cmd, pwmd_inquire_fn fn,
1308         void *data)
1309 {
1310     if (!pwm || !cmd || !fn)
1311         return GPG_ERR_INV_ARG;
1312
1313     pwm->inquire_func = fn;
1314     pwm->inquire_data = data;
1315     return assuan_command(pwm, pwm->ctx, NULL, cmd);
1316 }
1317
1318 static gpg_error_t terminate_pinentry(pwm_t *pwm)
1319 {
1320 #ifndef WITH_PINENTRY
1321     return GPG_ERR_NOT_IMPLEMENTED;
1322 #else
1323     pid_t pid = pwm->pid;
1324
1325     pwm->pid = -1;
1326
1327     if (!pwm || pid == -1)
1328         return GPG_ERR_INV_ARG;
1329
1330     if (kill(pid, 0) == 0) {
1331         if (kill(pid, SIGTERM) == -1) {
1332             if (kill(pid, SIGKILL) == -1)
1333                 return gpg_error_from_errno(errno);
1334         }
1335     }
1336     else
1337         return gpg_error_from_errno(errno);
1338
1339     return 0;
1340 #endif
1341 }
1342
1343 #ifdef WITH_PINENTRY
1344 static gpg_error_t set_pinentry_strings(pwm_t *pwm, int which)
1345 {
1346     char *buf;
1347     char tmp[ASSUAN_LINELENGTH];
1348     gpg_error_t error;
1349
1350     if (!pwm->title)
1351         pwm->title = pwmd_strdup(N_("LibPWMD"));
1352
1353     if (!pwm->prompt)
1354         pwm->prompt = pwmd_strdup(N_("Passphrase:"));
1355
1356     if (!pwm->desc && !which)
1357         pwm->desc = pwmd_strdup(N_("Enter a passphrase."));
1358
1359     if (which == 1) {
1360         snprintf(tmp, sizeof(tmp), "SETERROR %s", N_("Invalid passphrase, please try again."));
1361         buf = pwmd_strdup(tmp);
1362     }
1363     else if (which == 2) {
1364         snprintf(tmp, sizeof(tmp), "SETERROR %s", N_("Please type the passphrase again for confirmation."));
1365         buf = pwmd_strdup(tmp);
1366     }
1367     else {
1368         buf = (char *)pwmd_malloc(strlen("SETERROR ") + strlen(pwm->desc) + 1);
1369         sprintf(buf, "SETERROR %s", pwm->desc);
1370     }
1371
1372     error = pinentry_command(pwm, NULL, buf);
1373     pwmd_free(buf);
1374
1375     if (error)
1376         return error;
1377
1378     buf = (char *)pwmd_malloc(strlen("SETPROMPT ") + strlen(pwm->prompt) + 1);
1379     sprintf(buf, "SETPROMPT %s", pwm->prompt);
1380     error = pinentry_command(pwm, NULL, buf);
1381     pwmd_free(buf);
1382
1383     if (error)
1384         return error;
1385
1386     buf = (char *)pwmd_malloc(strlen("SETDESC ") + strlen(pwm->title) + 1);
1387     sprintf(buf, "SETDESC %s", pwm->title);
1388     error = pinentry_command(pwm, NULL, buf);
1389     pwmd_free(buf);
1390     return error;
1391 }
1392
1393 static void update_pinentry_settings(pwm_t *pwm)
1394 {
1395     FILE *fp;
1396     char buf[LINE_MAX];
1397     char *p;
1398     struct passwd pw;
1399     char *pwbuf = _getpwuid(&pw);
1400
1401     if (!pwbuf)
1402         return;
1403
1404     snprintf(buf, sizeof(buf), "%s/.pwmd/pinentry.conf", pw.pw_dir);
1405     pwmd_free(pwbuf);
1406
1407     if ((fp = fopen(buf, "r")) == NULL)
1408         return;
1409
1410     while ((p = fgets(buf, sizeof(buf), fp)) != NULL) {
1411         char name[32], val[256];
1412
1413         if (sscanf(p, " %31[a-zA-Z] = %255s", name, val) != 2)
1414             continue;
1415
1416         if (strcasecmp(name, "TTYNAME") == 0) {
1417             pwmd_free(pwm->pinentry_tty);
1418             pwm->pinentry_tty = pwmd_strdup(val);
1419         }
1420         else if (strcasecmp(name, "TTYTYPE") == 0) {
1421             pwmd_free(pwm->pinentry_term);
1422             pwm->pinentry_term = pwmd_strdup(val);
1423         }
1424         else if (strcasecmp(name, "DISPLAY") == 0) {
1425             pwmd_free(pwm->pinentry_display);
1426             pwm->pinentry_display = pwmd_strdup(val);
1427         }
1428         else if (strcasecmp(name, "PATH") == 0) {
1429             pwmd_free(pwm->pinentry_path);
1430             pwm->pinentry_path = pwmd_strdup(val);
1431         }
1432     }
1433
1434     fclose(fp);
1435 }
1436
1437 static gpg_error_t launch_pinentry(pwm_t *pwm)
1438 {
1439     int rc;
1440     assuan_context_t ctx;
1441     int child_list[] = {-1};
1442     char *display = getenv("DISPLAY");
1443     const char *argv[10];
1444     const char **p = argv;
1445     int have_display = 0;
1446     char *tty = NULL;
1447     char *ttybuf = NULL;
1448
1449     update_pinentry_settings(pwm);
1450
1451     if (pwm->pinentry_display || display)
1452         have_display = 1;
1453     else {
1454         if (!pwm->pinentry_tty) {
1455             ttybuf = pwmd_malloc(255);
1456
1457             if (!ttybuf)
1458                 return gpg_error_from_errno(ENOMEM);
1459
1460             rc = ttyname_r(STDOUT_FILENO, ttybuf, 255);
1461
1462             if (rc) {
1463                 pwmd_free(ttybuf);
1464                 return gpg_error_from_errno(rc);
1465             }
1466
1467             tty = ttybuf;
1468         }
1469         else
1470             tty = pwm->pinentry_tty;
1471     }
1472
1473     if (!have_display && !tty)
1474         return GPG_ERR_ENOTTY;
1475
1476     *p++ = "pinentry";
1477     *p++ = have_display ? "--display" : "--ttyname";
1478     *p++ = have_display ? pwm->pinentry_display ? pwm->pinentry_display : display : tty;
1479
1480     if (pwm->lcctype) {
1481         *p++ = "--lc-ctype";
1482         *p++ = pwm->lcctype;
1483     }
1484
1485     if (pwm->lcmessages) {
1486         *p++ = "--lc-messages";
1487         *p++ = pwm->lcmessages;
1488     }
1489
1490     *p = NULL;
1491
1492     if (!have_display) {
1493         *p++ = "--ttytype";
1494         *p++ = pwm->pinentry_term ? pwm->pinentry_term : getenv("TERM");
1495         *p = NULL;
1496     }
1497
1498     rc = assuan_pipe_connect(&ctx, pwm->pinentry_path ? pwm->pinentry_path : PINENTRY_PATH, argv, child_list);
1499
1500     if (ttybuf)
1501         pwmd_free(ttybuf);
1502
1503     if (rc)
1504         return rc;
1505
1506     pwm->pid = assuan_get_pid(ctx);
1507     pwm->pctx = ctx;
1508     return set_pinentry_strings(pwm, 0);
1509 }
1510
1511 static gpg_error_t pinentry_command(pwm_t *pwm, char **result, const char *cmd)
1512 {
1513     gpg_error_t n;
1514
1515     if (!pwm->pctx) {
1516         n = launch_pinentry(pwm);
1517
1518         if (n)
1519             return n;
1520     }
1521
1522     return assuan_command(pwm, pwm->pctx, result, cmd);
1523 }
1524
1525 static void pinentry_disconnect(pwm_t *pwm)
1526 {
1527     if (pwm->pctx)
1528         assuan_disconnect(pwm->pctx);
1529
1530     pwm->pctx = NULL;
1531     pwm->pid = -1;
1532 }
1533
1534 /*
1535  * Only called from a child process.
1536  */
1537 static void catchsig(int sig)
1538 {
1539     switch (sig) {
1540         case SIGALRM:
1541             if (gelapsed++ >= gtimeout)
1542                 terminate_pinentry(gpwm);
1543             else
1544                 alarm(1);
1545             break;
1546         default:
1547             break;
1548     }
1549 }
1550 #endif
1551
1552 /*
1553  * Borrowed from libassuan.
1554  */
1555 static char *percent_escape(const char *atext)
1556 {
1557     const unsigned char *s;
1558     int len = strlen(atext) * 3 + 1;
1559     char *buf = (char *)pwmd_malloc(len), *p = buf;
1560
1561     if (!buf)
1562         return NULL;
1563
1564     for (s=(const unsigned char *)atext; *s; s++) {
1565         if (*s < ' ') {
1566             sprintf (p, "%%%02X", *s);
1567             p += 3;
1568         }
1569         else
1570             *p++ = *s;
1571     }
1572
1573     *p = 0;
1574     return buf;
1575 }
1576
1577 static gpg_error_t send_command(pwm_t *pwm, char **result, const char *cmd)
1578 {
1579     if (!cmd)
1580         return GPG_ERR_INV_ARG;
1581
1582     return assuan_command(pwm, pwm->ctx, result, cmd);
1583 }
1584
1585 gpg_error_t pwmd_command_ap(pwm_t *pwm, char **result, const char *cmd,
1586         va_list ap)
1587 {
1588     char *buf;
1589     size_t len;
1590     gpg_error_t error;
1591
1592     if (!pwm || !cmd)
1593         return GPG_ERR_INV_ARG;
1594
1595     /*
1596      * C99 allows the dst pointer to be null which will calculate the length
1597      * of the would-be result and return it.
1598      */
1599     len = vsnprintf(NULL, 0, cmd, ap)+1;
1600     buf = (char *)pwmd_malloc(len);
1601     len = vsnprintf(buf, len, cmd, ap);
1602     error = send_command(pwm, result, buf);
1603     pwmd_free(buf);
1604     return error;
1605 }
1606
1607 /*
1608  * Avoid sending the BYE command here. libassuan will close the file
1609  * descriptor and release the assuan context. Use pwmd_close() instead.
1610  */
1611 gpg_error_t pwmd_command(pwm_t *pwm, char **result, const char *cmd, ...)
1612 {
1613     va_list ap;
1614     gpg_error_t error;
1615
1616     if (!pwm || !cmd)
1617         return GPG_ERR_INV_ARG;
1618
1619     if (result)
1620         *result = NULL;
1621
1622     va_start(ap, cmd);
1623     error = pwmd_command_ap(pwm, result, cmd, ap);
1624     va_end(ap);
1625     return error;
1626 }
1627
1628 #ifdef WITH_PINENTRY
1629 static gpg_error_t do_getpin(pwm_t *pwm, char **result)
1630 {
1631     if (gtimeout) {
1632         signal(SIGALRM, catchsig);
1633         alarm(1);
1634     }
1635
1636     *result = NULL;
1637     return pinentry_command(pwm, result, "GETPIN");
1638 }
1639
1640 static gpg_error_t getpin(pwm_t *pwm, char **result, int *try_n, int which)
1641 {
1642     int pin_try = *try_n;
1643     gpg_error_t error;
1644
1645 getpin_again:
1646     *try_n = pin_try;
1647
1648     if (pin_try == -1) {
1649         error = set_pinentry_strings(pwm, which);
1650
1651         if (error) {
1652             pinentry_disconnect(pwm);
1653             return error;
1654         }
1655     }
1656     else {
1657         if (pwm->pinentry_tries-1 != pin_try) {
1658             error = set_pinentry_strings(pwm, 1);
1659
1660             if (error) {
1661                 pinentry_disconnect(pwm);
1662                 return error;
1663             }
1664         }
1665     }
1666
1667     error = do_getpin(pwm, result);
1668
1669     /*
1670      * Since there was input cancel any timeout setting.
1671      */
1672     alarm(0);
1673
1674     if (error) {
1675         if (error == GPG_ERR_CANCELED)
1676             return GPG_ERR_CANCELED;
1677
1678         if (pin_try != -1 && pin_try--)
1679             goto getpin_again;
1680
1681         if (pwm->pctx)
1682             pinentry_disconnect(pwm);
1683
1684         *try_n = pin_try;
1685         return error;
1686     }
1687
1688     return 0;
1689 }
1690 #endif
1691
1692 static gpg_error_t do_open_command(pwm_t *pwm, const char *filename, char *password)
1693 {
1694     char buf[ASSUAN_LINELENGTH];
1695     gpg_error_t error;
1696     char *result = NULL;
1697
1698     snprintf(buf, sizeof(buf), "OPEN %s %s", filename, password ? password : "");
1699     error = send_command(pwm, &result, buf);
1700     memset(buf, 0, sizeof(buf));
1701
1702     if (error && result)
1703         pwmd_free(result);
1704
1705     return error;
1706 }
1707
1708 static gpg_error_t do_pwmd_open(pwm_t *pwm, const char *filename, int nb)
1709 {
1710     char *result = NULL;
1711     char *password = NULL;
1712     char path[PATH_MAX];
1713 #ifdef WITH_PINENTRY
1714     int pin_try;
1715 #endif
1716     gpg_error_t rc;
1717
1718     if (!pwm || !filename || !*filename)
1719         return GPG_ERR_INV_ARG;
1720
1721 #ifdef WITH_PINENTRY
1722     pin_try = pwm->pinentry_tries - 1;
1723 #endif
1724
1725     /*
1726      * Avoid calling pinentry if the password is cached on the server or if
1727      * this is a new file.
1728      */
1729     rc = pwmd_command(pwm, &result, "GETCONFIG data_directory");
1730
1731     if (rc)
1732         return rc;
1733
1734     snprintf(path, sizeof(path), "%s/%s", result, filename);
1735     pwmd_free(result);
1736
1737     if (access(path, R_OK) == -1) {
1738         if (errno == ENOENT)
1739             goto gotpassword;
1740     }
1741
1742     rc = pwmd_command(pwm, &result, "ISCACHED %s", filename);
1743
1744     if (rc == EPWMD_CACHE_NOT_FOUND) {
1745         if (pwm->passfunc) {
1746             password = (char *)pwm->passfunc(pwm->passdata);
1747             goto gotpassword;
1748         }
1749
1750 #ifdef WITH_PINENTRY
1751         /*
1752          * Get the password from pinentry.
1753          */
1754         if (pwm->use_pinentry) {
1755             /*
1756              * Nonblocking is wanted. fork() then return a file descriptor
1757              * that the client can use to read() from.
1758              */
1759             if (nb) {
1760                 int p[2];
1761                 pid_t pid;
1762                 pwmd_nb_status_t pw;
1763
1764                 if (pipe(p) == -1)
1765                     return gpg_error_from_syserror();
1766
1767 #ifdef WITH_LIBPTH
1768                 pid = pth_fork();
1769 #else
1770                 pid = fork();
1771 #endif
1772
1773                 switch (pid) {
1774                     case 0:
1775                         close(p[0]);
1776                         pw.fd = p[0];
1777
1778                         if (pwm->pinentry_timeout > 0) {
1779                             gpwm = pwm;
1780                             gtimeout = pwm->pinentry_timeout;
1781                             gelapsed = 0;
1782                         }
1783
1784 getpin_nb_again:
1785                         rc = getpin(pwm, &password, &pin_try, 0);
1786
1787                         if (rc) {
1788 getpin_nb_fail:
1789                             if (pwm->pctx)
1790                                 pinentry_disconnect(pwm);
1791
1792                             if (gtimeout && gelapsed >= gtimeout)
1793                                 rc = GPG_ERR_TIMEOUT;
1794
1795                             pw.error = rc;
1796 #ifdef WITH_LIBPTH
1797                             pth_write(p[1], &pw, sizeof(pw));
1798 #else
1799                             write(p[1], &pw, sizeof(pw));
1800 #endif
1801                             close(p[1]);
1802                             _exit(1);
1803                         }
1804
1805                         /*
1806                          * Don't count the time it takes to open the file
1807                          * which may have many iterations.
1808                          */
1809                         signal(SIGALRM, SIG_DFL);
1810                         rc = do_open_command(pwm, filename, password);
1811
1812                         if (pwm->pinentry_timeout)
1813                             signal(SIGALRM, catchsig);
1814
1815                         if (pwm->pctx && rc == EPWMD_BADKEY) {
1816                             if (pin_try-- > 0)
1817                                 goto getpin_nb_again;
1818
1819                             goto getpin_nb_fail;
1820                         }
1821
1822                         pinentry_disconnect(pwm);
1823                         pw.error = 0;
1824 #ifdef WITH_LIBPTH
1825                         pth_write(p[1], &pw, sizeof(pw));
1826 #else
1827                         write(p[1], &pw, sizeof(pw));
1828 #endif
1829                         close(p[1]);
1830                         _exit(0);
1831                         break;
1832                     case -1:
1833                         rc = gpg_error_from_syserror();
1834                         close(p[0]);
1835                         close(p[1]);
1836                         return rc;
1837                     default:
1838                         break;
1839                 }
1840
1841                 close(p[1]);
1842                 pwm->nb_fd = p[0];
1843                 return 0;
1844             }
1845         }
1846         else {
1847 #endif
1848             /*
1849              * Not using pinentry and the file was not found
1850              * in the cache.
1851              */
1852             password = pwm->password;
1853 #ifdef WITH_PINENTRY
1854         }
1855 #endif
1856     }
1857     else if (rc)
1858         return rc;
1859
1860 gotpassword:
1861     rc = do_open_command(pwm, filename, password);
1862
1863     /*
1864      * Keep the user defined password set with pwmd_setopt(). The password may
1865      * be needed later (pwmd_save()) depending on the pwmd file cache settings.
1866      */
1867     if (!pwm->passfunc && password && password != pwm->password)
1868         pwmd_free(password);
1869
1870 #ifdef WITH_PINENTRY
1871     if (rc == EPWMD_BADKEY) {
1872         if (pin_try-- > 0 && !nb) {
1873             rc = pwmd_command(pwm, &result, "OPTION TITLE=%s",
1874                     N_("Invalid passphrase, please try again."));
1875
1876             if (rc)
1877                 return rc;
1878
1879             goto gotpassword;
1880         }
1881
1882         if (nb)
1883             pinentry_disconnect(pwm);
1884
1885         return rc;
1886     }
1887 #endif
1888
1889     if (!rc) {
1890         if (pwm->filename)
1891             pwmd_free(pwm->filename);
1892
1893         pwm->filename = pwmd_strdup(filename);
1894     }
1895
1896     return rc;
1897 }
1898
1899 gpg_error_t pwmd_open(pwm_t *pwm, const char *filename)
1900 {
1901     return do_pwmd_open(pwm, filename, 0);
1902 }
1903
1904 gpg_error_t pwmd_open_async2(pwm_t *pwm, const char *filename)
1905 {
1906 #ifndef WITH_PINENTRY
1907     return GPG_ERR_NOT_IMPLEMENTED;
1908 #else
1909     gpg_error_t rc;
1910
1911     pwm->cmd = ASYNC_CMD_OPEN2;
1912     pwm->state = ASYNC_PROCESS;
1913     rc = do_pwmd_open(pwm, filename, 1);
1914
1915     if (rc)
1916         reset_async(pwm, 1);
1917
1918     return rc;
1919 #endif
1920 }
1921
1922 #ifdef WITH_PINENTRY
1923 static gpg_error_t do_save_getpin(pwm_t *pwm, char **password)
1924 {
1925     int confirm = 0;
1926     gpg_error_t error;
1927     char *result = NULL;
1928     int pin_try = -1;
1929
1930 again:
1931     error = getpin(pwm, &result, &pin_try, confirm ? 2 : 0);
1932
1933     if (error) {
1934         if (pwm->pctx)
1935             pinentry_disconnect(pwm);
1936
1937         if (*password)
1938             pwmd_free(*password);
1939
1940         return error;
1941     }
1942
1943     if (!confirm++) {
1944         *password = result;
1945         goto again;
1946     }
1947
1948     if (strcmp(*password, result)) {
1949         pwmd_free(*password);
1950         pwmd_free(result);
1951         pinentry_disconnect(pwm);
1952         error = EPWMD_BADKEY;
1953         return error;
1954     }
1955
1956     pwmd_free(result);
1957     pinentry_disconnect(pwm);
1958     return 0;
1959 }
1960 #endif
1961
1962 static gpg_error_t do_save_command(pwm_t *pwm, char *password)
1963 {
1964     char buf[ASSUAN_LINELENGTH];
1965     gpg_error_t error;
1966     char *result = NULL;
1967
1968     snprintf(buf, sizeof(buf), "SAVE %s", password ? password : "");
1969     error = send_command(pwm, &result, buf);
1970     memset(&buf, 0, sizeof(buf));
1971
1972     if (error && result)
1973         pwmd_free(result);
1974
1975     return error;
1976 }
1977
1978 static gpg_error_t do_pwmd_save(pwm_t *pwm, int nb)
1979 {
1980     char *result = NULL;
1981     char *password = NULL;
1982     gpg_error_t rc;
1983
1984     if (!pwm)
1985         return GPG_ERR_INV_ARG;
1986
1987     if (pwm->use_pinentry || pwm->passfunc) {
1988         rc = pwmd_command(pwm, &result, "ISCACHED %s", pwm->filename);
1989
1990         if (rc == EPWMD_CACHE_NOT_FOUND) {
1991             if (pwm->passfunc)
1992                 password = (char *)(*pwm->passfunc)(pwm->passdata);
1993 #ifdef WITH_PINENTRY
1994             else if (pwm->use_pinentry) {
1995                 if (nb) {
1996                     int p[2];
1997                     pid_t pid;
1998                     pwmd_nb_status_t pw;
1999
2000                     if (pipe(p) == -1)
2001                         return gpg_error_from_syserror();
2002
2003 #ifdef WITH_LIBPTH
2004                     pid = pth_fork();
2005 #else
2006                     pid = fork();
2007 #endif
2008
2009                     switch (pid) {
2010                         case 0:
2011                             close(p[0]);
2012                             pw.fd = p[0];
2013
2014                             do {
2015                                 password = NULL;
2016                                 rc = do_save_getpin(pwm, &password);
2017                             } while (rc == EPWMD_BADKEY);
2018
2019                             if (rc) {
2020                                 if (pwm->pctx)
2021                                     pinentry_disconnect(pwm);
2022
2023                                 pw.error = rc;
2024 #ifdef WITH_LIBPTH
2025                                 pth_write(p[1], &pw, sizeof(pw));
2026 #else
2027                                 write(p[1], &pw, sizeof(pw));
2028 #endif
2029                                 close(p[1]);
2030                                 _exit(1);
2031                             }
2032
2033                             rc = do_save_command(pwm, password);
2034                             pinentry_disconnect(pwm);
2035                             pw.error = rc;
2036 #ifdef WITH_LIBPTH
2037                             pth_write(p[1], &pw, sizeof(pw));
2038 #else
2039                             write(p[1], &pw, sizeof(pw));
2040 #endif
2041                             close(p[1]);
2042                             _exit(0);
2043                             break;
2044                         case -1:
2045                             rc = gpg_error_from_syserror();
2046                             close(p[0]);
2047                             close(p[1]);
2048                             return rc;
2049                         default:
2050                             break;
2051                     }
2052
2053                     close(p[1]);
2054                     pwm->nb_fd = p[0];
2055                     return 0;
2056                 }
2057
2058                 rc = do_save_getpin(pwm, &password);
2059
2060                 if (rc)
2061                     return rc;
2062             }
2063 #endif
2064         }
2065         else {
2066             if (rc)
2067                 return rc;
2068         }
2069     }
2070     else
2071         password = pwm->password;
2072
2073     rc = do_save_command(pwm, password);
2074
2075     if (!pwm->passfunc && password && password != pwm->password)
2076         pwmd_free(password);
2077
2078     return rc;
2079 }
2080
2081 gpg_error_t pwmd_save_async2(pwm_t *pwm)
2082 {
2083 #ifndef WITH_PINENTRY
2084     return GPG_ERR_NOT_IMPLEMENTED;
2085 #else
2086     gpg_error_t rc;
2087
2088     pwm->cmd = ASYNC_CMD_SAVE2;
2089     pwm->state = ASYNC_PROCESS;
2090     rc = do_pwmd_save(pwm, 1);
2091
2092     if (rc)
2093         reset_async(pwm, 0);
2094
2095     return rc;
2096 #endif
2097 }
2098
2099 gpg_error_t pwmd_save(pwm_t *pwm)
2100 {
2101     return do_pwmd_save(pwm, 0);
2102 }
2103
2104 gpg_error_t pwmd_setopt(pwm_t *pwm, pwmd_option_t opt, ...)
2105 {
2106     va_list ap;
2107     int n = va_arg(ap, int);
2108     char *result;
2109     char *arg1;
2110     gpg_error_t error = 0;
2111
2112     if (!pwm)
2113         return GPG_ERR_INV_ARG;
2114
2115     va_start(ap, opt);
2116
2117     switch (opt) {
2118         case PWMD_OPTION_STATUS_FUNC:
2119             pwm->status_func = va_arg(ap, pwmd_status_fn);
2120             break;
2121         case PWMD_OPTION_STATUS_DATA:
2122             pwm->status_data = va_arg(ap, void *);
2123             break;
2124         case PWMD_OPTION_PASSWORD_FUNC:
2125             pwm->passfunc = va_arg(ap, pwmd_password_fn);
2126             break;
2127         case PWMD_OPTION_PASSWORD_DATA:
2128             pwm->passdata = va_arg(ap, void *);
2129             break;
2130         case PWMD_OPTION_PASSWORD:
2131             arg1 = va_arg(ap, char *);
2132
2133             if (pwm->password)
2134                 pwmd_free(pwm->password);
2135
2136             pwm->password = pwmd_strdup(arg1);
2137             break;
2138         case PWMD_OPTION_PINENTRY:
2139             n = va_arg(ap, int);
2140
2141             if (n != 0 && n != 1) {
2142                 va_end(ap);
2143                 error = GPG_ERR_INV_VALUE;
2144             }
2145             else {
2146                 pwm->use_pinentry = n;
2147                 error = pwmd_command(pwm, &result, "OPTION PINENTRY=%i",
2148                         !pwm->use_pinentry);
2149             }
2150             break;
2151 #ifdef WITH_PINENTRY
2152         case PWMD_OPTION_PINENTRY_TRIES:
2153             n = va_arg(ap, int);
2154
2155             if (n <= 0) {
2156                 va_end(ap);
2157                 error = GPG_ERR_INV_VALUE;
2158             }
2159             else
2160                 pwm->pinentry_tries = n;
2161             break;
2162 #endif
2163         case PWMD_OPTION_PINENTRY_TIMEOUT:
2164             n = va_arg(ap, int);
2165
2166             if (n < 0) {
2167                 va_end(ap);
2168                 error = GPG_ERR_INV_VALUE;
2169             }
2170             else
2171                 pwm->pinentry_timeout = n;
2172
2173             if (!pwm->use_pinentry)
2174                 error = pwmd_command(pwm, &result, "OPTION TIMEOUT=%i",
2175                         pwm->pinentry_timeout);
2176             break;
2177         case PWMD_OPTION_PINENTRY_PATH:
2178             if (pwm->pinentry_path)
2179                 pwmd_free(pwm->pinentry_path);
2180
2181             pwm->pinentry_path = pwmd_strdup(va_arg(ap, char *));
2182
2183             if (!pwm->use_pinentry)
2184                 error = pwmd_command(pwm, &result, "OPTION PATH=%s",
2185                         pwm->pinentry_path);
2186             break;
2187         case PWMD_OPTION_PINENTRY_TTY:
2188             if (pwm->pinentry_tty)
2189                 pwmd_free(pwm->pinentry_tty);
2190
2191             pwm->pinentry_tty = pwmd_strdup(va_arg(ap, char *));
2192
2193             if (!pwm->use_pinentry)
2194                 error = pwmd_command(pwm, &result, "OPTION TTY=%s",
2195                         pwm->pinentry_tty);
2196             break;
2197         case PWMD_OPTION_PINENTRY_DISPLAY:
2198             if (pwm->pinentry_display)
2199                 pwmd_free(pwm->pinentry_display);
2200
2201             pwm->pinentry_display = pwmd_strdup(va_arg(ap, char *));
2202
2203             if (!pwm->use_pinentry)
2204                 error = pwmd_command(pwm, &result, "OPTION DISPLAY=%s",
2205                         pwm->pinentry_display);
2206             break;
2207         case PWMD_OPTION_PINENTRY_TERM:
2208             if (pwm->pinentry_term)
2209                 pwmd_free(pwm->pinentry_term);
2210
2211             pwm->pinentry_term = pwmd_strdup(va_arg(ap, char *));
2212
2213             if (!pwm->use_pinentry)
2214                 error = pwmd_command(pwm, &result, "OPTION TTYTYPE=%s",
2215                         pwm->pinentry_term);
2216             break;
2217         case PWMD_OPTION_PINENTRY_TITLE:
2218             if (pwm->title)
2219                 pwmd_free(pwm->title);
2220
2221             pwm->title = percent_escape(va_arg(ap, char *));
2222
2223             if (!pwm->use_pinentry)
2224                 error = pwmd_command(pwm, &result, "OPTION TITLE=%s",
2225                         pwm->title);
2226             break;
2227         case PWMD_OPTION_PINENTRY_PROMPT:
2228             if (pwm->prompt)
2229                 pwmd_free(pwm->prompt);
2230
2231             pwm->prompt = percent_escape(va_arg(ap, char *));
2232
2233             if (!pwm->use_pinentry)
2234                 error = pwmd_command(pwm, &result, "OPTION PROMPT=%s",
2235                         pwm->prompt);
2236             break;
2237         case PWMD_OPTION_PINENTRY_DESC:
2238             if (pwm->desc)
2239                 pwmd_free(pwm->desc);
2240
2241             pwm->desc = percent_escape(va_arg(ap, char *));
2242
2243             if (!pwm->use_pinentry)
2244                 error = pwmd_command(pwm, &result, "OPTION DESC=%s",
2245                         pwm->desc);
2246             break;
2247         case PWMD_OPTION_PINENTRY_LC_CTYPE:
2248             if (pwm->lcctype)
2249                 pwmd_free(pwm->lcctype);
2250
2251             pwm->lcctype = pwmd_strdup(va_arg(ap, char *));
2252
2253             if (!pwm->use_pinentry)
2254                 error = pwmd_command(pwm, &result, "OPTION LC_CTYPE=%s",
2255                         pwm->lcctype);
2256             break;
2257         case PWMD_OPTION_PINENTRY_LC_MESSAGES:
2258             if (pwm->lcmessages)
2259                 pwmd_free(pwm->lcmessages);
2260
2261             pwm->lcmessages = pwmd_strdup(va_arg(ap, char *));
2262
2263             if (!pwm->use_pinentry)
2264                 error = pwmd_command(pwm, &result, "OPTION LC_MESSAGES=%s",
2265                         pwm->lcmessages);
2266             break;
2267         default:
2268             error = GPG_ERR_NOT_IMPLEMENTED;
2269             break;
2270     }
2271
2272     va_end(ap);
2273     return error;
2274 }
2275
2276 gpg_error_t pwmd_get_fd(pwm_t *pwm, int *fd)
2277 {
2278     if (!pwm)
2279         return GPG_ERR_INV_ARG;
2280
2281     if (pwm->fd == -1)
2282         return GPG_ERR_INV_STATE;
2283
2284     *fd = pwm->fd;
2285     return 0;
2286 }
2287
2288 gpg_error_t pwmd_get_fd2(pwm_t *pwm, int *fd)
2289 {
2290 #ifndef WITH_PINENTRY
2291     return GPG_ERR_NOT_IMPLEMENTED;
2292 #else
2293     if (!pwm)
2294         return GPG_ERR_INV_ARG;
2295
2296     if (pwm->nb_fd == -1)
2297         return GPG_ERR_INV_STATE;
2298
2299     *fd = pwm->nb_fd;
2300     return 0;
2301 #endif
2302 }
2303
2304 pwm_t *pwmd_new(const char *name)
2305 {
2306     pwm_t *h = pwmd_calloc(1, sizeof(pwm_t));
2307
2308     if (!h)
2309         return NULL;
2310
2311     if (name) {
2312         h->name = pwmd_strdup(name);
2313
2314         if (!h->name) {
2315             pwmd_free(h);
2316             return NULL;
2317         }
2318     }
2319
2320     h->fd = -1;
2321 #ifdef WITH_PINENTRY
2322     h->nb_fd = -1;
2323 #endif
2324     return h;
2325 }
2326
2327 void pwmd_free(void *ptr)
2328 {
2329     xfree(ptr);
2330 }
2331
2332 void *pwmd_malloc(size_t size)
2333 {
2334     return xmalloc(size);
2335 }
2336
2337 void *pwmd_calloc(size_t nmemb, size_t size)
2338 {
2339     return xcalloc(nmemb, size);
2340 }
2341
2342 void *pwmd_realloc(void *ptr, size_t size)
2343 {
2344     return xrealloc(ptr, size);
2345 }
2346
2347 char *pwmd_strdup(const char *str)
2348 {
2349     return xstrdup(str);
2350 }