src/libpwmd.c

   1 /*
   2     Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
   3     Ben Kibbey <bjk@luxsci.net>
   4
   5     This file is part of libpwmd.
   6
   7     Libpwmd is free software: you can redistribute it and/or modify
   8     it under the terms of the GNU General Public License as published by
   9     the Free Software Foundation, either version 2 of the License, or
  10     (at your option) any later version.
  11
  12     Libpwmd is distributed in the hope that it will be useful,
  13     but WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15     GNU General Public License for more details.
  16
  17     You should have received a copy of the GNU General Public License
  18     along with Libpwmd.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20 #ifdef HAVE_CONFIG_H
  21 #include <config.h>
  22 #endif
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <unistd.h>
  27 #include <err.h>
  28 #include <errno.h>
  29 #include <ctype.h>
  30 #include <string.h>
  31 #include <sys/types.h>
  32 #include <sys/socket.h>
  33 #include <sys/un.h>
  34 #include <signal.h>
  35 #include <stdarg.h>
  36 #include <string.h>
  37 #include <sys/wait.h>
  38 #include <fcntl.h>
  39 #include <pwd.h>
  40 #include <time.h>
  41 #include <limits.h>
  42 #include <sys/select.h>
  43 #include <termios.h>
  44 #include <libpwmd.h>
  45
  46 #ifdef HAVE_STRINGS_H
  47 #include <strings.h>
  48 #endif
  49
  50 #ifndef LINE_MAX
  51 #define LINE_MAX        2048
  52 #endif
  53
  54 #include "mem.h"
  55 #include "misc.h"
  56 #include "types.h"
  57
  58 #ifdef WITH_PINENTRY
  59 #include "pinentry.h"
  60 #endif
  61
  62 #if defined(WITH_SSH) || defined(WITH_GNUTLS)
  63 #include <sys/types.h>
  64 #include <sys/socket.h>
  65 #include <netdb.h>
  66 #include <netinet/in.h>
  67 #endif
  68
  69 #define FINISH(rc) (gpg_err_source(rc) == GPG_ERR_SOURCE_UNKNOWN) \
  70                                         ? gpg_error(rc) : rc
  71
  72 typedef struct
  73 {
  74   size_t len;
  75   void *buf;
  76 } membuf_t;
  77
  78 ssize_t
  79 hook_read (assuan_context_t ctx, assuan_fd_t fd, void *data, size_t len)
  80 {
  81 #if defined(WITH_SSH) || defined(WITH_GNUTLS)
  82   pwm_t *pwm = assuan_get_pointer (ctx);
  83
  84 #ifdef WITH_SSH
  85   if (pwm && pwm->tcp && pwm->tcp->ssh)
  86     return read_hook_ssh (pwm->tcp->ssh, fd, data, len);
  87 #endif
  88 #ifdef WITH_GNUTLS
  89   if (pwm && pwm->tcp && pwm->tcp->tls)
  90     return read_hook_tls (pwm, fd, data, len);
  91 #endif
  92 #endif
  93
  94   return read ((int) fd, data, len);
  95 }
  96
  97 ssize_t
  98 hook_write (assuan_context_t ctx, assuan_fd_t fd, const void *data,
  99             size_t len)
 100 {
 101   ssize_t wrote;
 102 #if defined(WITH_SSH) || defined(WITH_GNUTLS)
 103   pwm_t *pwm = assuan_get_pointer (ctx);
 104
 105 #ifdef WITH_SSH
 106   if (pwm && pwm->tcp && pwm->tcp->ssh)
 107     return write_hook_ssh (pwm->tcp->ssh, fd, data, len);
 108 #endif
 109 #ifdef WITH_GNUTLS
 110   if (pwm && pwm->tcp && pwm->tcp->tls)
 111     return write_hook_tls (pwm, fd, data, len);
 112 #endif
 113 #endif
 114
 115   /* libassuan cannot handle EAGAIN when doing writes. */
 116   do
 117     {
 118       wrote = write ((int) fd, data, len);
 119       if (wrote == -1 && errno == EAGAIN)
 120         usleep (50000);
 121     }
 122   while (wrote == -1 && errno == EAGAIN);
 123
 124   return wrote;
 125 }
 126
 127 pid_t
 128 hook_waitpid (assuan_context_t ctx, pid_t pid, int action, int *status,
 129               int options)
 130 {
 131   return waitpid (pid, status, options);
 132 }
 133
 134 gpg_error_t
 135 pwmd_init ()
 136 {
 137   static int initialized;
 138
 139 #ifdef WITH_GNUTLS
 140   // May be called more than once.
 141   gnutls_global_init ();
 142 #endif
 143
 144   if (initialized)
 145     return 0;
 146
 147 #ifndef MEM_DEBUG
 148   _xmem_init ();
 149 #endif
 150 #ifdef ENABLE_NLS
 151   bindtextdomain ("libpwmd", LOCALEDIR);
 152 #endif
 153 #ifdef WITH_SSH
 154   libssh2_init (0);
 155 #endif
 156   gpg_err_init ();
 157   initialized = 1;
 158   return 0;
 159 }
 160
 161 void
 162 pwmd_deinit ()
 163 {
 164 #ifdef WITH_GNUTLS
 165   gnutls_global_deinit ();
 166 #endif
 167 }
 168
 169 gpg_error_t
 170 _connect_finalize (pwm_t * pwm)
 171 {
 172   gpg_error_t rc = 0;
 173   char *result = NULL;
 174   int active[2];
 175   int n = assuan_get_active_fds (pwm->ctx, 0, active, N_ARRAY (active));
 176
 177   if (n <= 0)
 178     return GPG_ERR_EBADFD;
 179
 180   pwm->fd = active[0];
 181 #ifdef WITH_PINENTRY
 182   pwm->pinentry_pid = -1;
 183 #endif
 184
 185   rc = pwmd_command (pwm, &result, NULL, NULL, NULL, "GETINFO VERSION");
 186   if (!rc)
 187     {
 188       pwm->version = strtoul (result, NULL, 16);
 189       pwmd_free (result);
 190     }
 191
 192   if (!rc && pwm->name)
 193     rc = pwmd_command (pwm, NULL, NULL, NULL, NULL, "OPTION NAME=%s",
 194                        pwm->name);
 195
 196   return rc;
 197 }
 198
 199 static gpg_error_t
 200 connect_uds (pwm_t * pwm, const char *path)
 201 {
 202   char *socketpath = NULL;
 203   struct passwd pw;
 204   char *pwbuf;
 205   gpg_error_t rc;
 206
 207   if (!pwm)
 208     return GPG_ERR_INV_ARG;
 209
 210   pwbuf = _getpwuid (&pw);
 211   if (!pwbuf)
 212     return gpg_error_from_syserror ();
 213
 214   if (!path || !*path)
 215     socketpath = pwmd_strdup_printf ("%s/.pwmd/socket", pw.pw_dir);
 216   else
 217     socketpath = _expand_homedir ((char *) path, &pw);
 218
 219   pwmd_free (pwbuf);
 220   if (!socketpath)
 221     return GPG_ERR_ENOMEM;
 222
 223   rc = assuan_socket_connect (pwm->ctx, socketpath, ASSUAN_INVALID_FD, 0);
 224   pwmd_free (socketpath);
 225   return rc ? rc : _connect_finalize (pwm);
 226 }
 227
 228 static gpg_error_t
 229 init_handle (pwm_t * pwm)
 230 {
 231   gpg_error_t rc;
 232   static struct assuan_malloc_hooks mhooks = {
 233     pwmd_malloc, pwmd_realloc, pwmd_free
 234   };
 235   static struct assuan_system_hooks shooks = {
 236     ASSUAN_SYSTEM_HOOKS_VERSION,
 237     __assuan_usleep,
 238     __assuan_pipe,
 239     __assuan_close,
 240     hook_read,
 241     hook_write,
 242     //FIXME
 243     NULL,                       //recvmsg
 244     NULL,                       //sendmsg both are used for FD passing
 245     __assuan_spawn,
 246     hook_waitpid,
 247     __assuan_socketpair,
 248     __assuan_socket,
 249     __assuan_connect
 250   };
 251
 252   rc = assuan_new_ext (&pwm->ctx, GPG_ERR_SOURCE_DEFAULT, &mhooks, NULL,
 253                        NULL);
 254   if (rc)
 255     return rc;
 256
 257   assuan_set_pointer (pwm->ctx, pwm);
 258   assuan_ctx_set_system_hooks (pwm->ctx, &shooks);
 259   return 0;
 260 }
 261
 262 #if defined(WITH_SSH) || defined(WITH_GNUTLS)
 263 void
 264 free_tcp (pwm_t *pwm)
 265 {
 266   struct tcp_s *tcp = pwm->tcp;
 267
 268   if (!tcp)
 269     return;
 270
 271 #ifdef WITH_SSH
 272   _free_ssh_conn (tcp->ssh);
 273 #endif
 274 #ifdef WITH_GNUTLS
 275   tls_free (pwm);
 276 #endif
 277
 278   pwmd_free (tcp->host);
 279   if (tcp->addrs)
 280     {
 281       freeaddrinfo (tcp->addrs);
 282       tcp->addrs = NULL;
 283     }
 284
 285   pwmd_free (tcp);
 286   pwm->tcp = NULL;
 287 }
 288 #endif
 289
 290 #if defined(WITH_SSH) || defined(WITH_GNUTLS)
 291 gpg_error_t
 292 tcp_connect_common (pwm_t * pwm)
 293 {
 294   struct addrinfo hints = { 0 };
 295   int n;
 296   char portstr[6];
 297   gpg_error_t rc = 0;
 298
 299   switch (pwm->prot)
 300     {
 301     case PWMD_IP_ANY:
 302       hints.ai_family = AF_UNSPEC;
 303       break;
 304     case PWMD_IPV4:
 305       hints.ai_family = AF_INET;
 306       break;
 307     case PWMD_IPV6:
 308       hints.ai_family = AF_INET6;
 309       break;
 310     }
 311
 312   hints.ai_socktype = SOCK_STREAM;
 313   snprintf (portstr, sizeof (portstr), "%i", pwm->tcp->port);
 314   n = getaddrinfo (pwm->tcp->host, portstr, &hints, &pwm->tcp->addrs);
 315   if (n)
 316     {
 317       fprintf (stderr, "%s\n", gai_strerror (n));
 318       return GPG_ERR_UNKNOWN_HOST;      //FIXME
 319     }
 320
 321   for (pwm->tcp->addr = pwm->tcp->addrs; pwm->tcp->addr;
 322        pwm->tcp->addr = pwm->tcp->addrs->ai_next)
 323     {
 324       pwm->fd = socket (pwm->tcp->addr->ai_family, SOCK_STREAM, 0);
 325       if (pwm->fd == -1)
 326         {
 327           rc = gpg_error_from_syserror ();
 328           if (pwm->tcp->addr == pwm->tcp->addrs->ai_next)
 329             break;
 330           continue;
 331         }
 332
 333       if (pwm->socket_timeout)
 334         {
 335           if (fcntl (pwm->fd, F_SETFL, O_NONBLOCK) == -1)
 336             {
 337               rc = gpg_error_from_syserror ();
 338               break;
 339             }
 340         }
 341
 342       if (connect (pwm->fd, pwm->tcp->addr->ai_addr,
 343                    pwm->tcp->addr->ai_family == AF_INET6
 344                    ? sizeof (struct sockaddr_in6)
 345                    : sizeof (struct sockaddr)) == -1)
 346         {
 347           int n;
 348           struct timeval tv = { pwm->socket_timeout, 0 };
 349           fd_set wfds;
 350
 351           rc = gpg_error_from_syserror ();
 352           if (gpg_err_code (rc) != GPG_ERR_EINPROGRESS)
 353             {
 354               close (pwm->fd);
 355               pwm->fd = -1;
 356               if (pwm->tcp->addr == pwm->tcp->addrs->ai_next)
 357                 return rc;
 358               continue;
 359             }
 360
 361           FD_ZERO (&wfds);
 362           FD_SET (pwm->fd, &wfds);
 363           n = select (pwm->fd+1, NULL, &wfds, NULL, &tv);
 364           rc = 0;
 365           if (!n)
 366             rc = gpg_error (GPG_ERR_ETIMEDOUT);
 367           else if (n != -1)
 368             {
 369               socklen_t len = sizeof(int);
 370
 371               getsockopt (pwm->fd, SOL_SOCKET, SO_ERROR, &n, &len);
 372               if (n)
 373                 rc = gpg_error_from_errno (n);
 374             }
 375           else if (n == -1)
 376             rc = gpg_error_from_syserror ();
 377
 378           if (rc)
 379             {
 380               close (pwm->fd);
 381               pwm->fd = -1;
 382               if (pwm->tcp->addr == pwm->tcp->addrs->ai_next
 383                   || gpg_err_code (rc) == GPG_ERR_ETIMEDOUT)
 384                 return rc;
 385             }
 386           else
 387             break;
 388         }
 389       else
 390         break;
 391     }
 392
 393   if (!rc && pwm->socket_timeout)
 394     if (fcntl (pwm->fd, F_SETFL, 0) == -1)
 395       rc = gpg_error_from_syserror ();
 396
 397   return rc;
 398 }
 399 #endif
 400
 401 gpg_error_t
 402 pwmd_connect (pwm_t * pwm, const char *url, ...)
 403 {
 404   const char *p = url;
 405   gpg_error_t rc;
 406
 407   if (!pwm)
 408     return FINISH (GPG_ERR_INV_ARG);
 409   else if (!pwm->ctx)
 410     {
 411       rc = init_handle (pwm);
 412       if (rc)
 413         return rc;
 414     }
 415
 416   if (!(pwm->opts & OPT_SIGPIPE))
 417     signal (SIGPIPE, SIG_IGN);
 418
 419 #ifdef WITH_GNUTLS
 420   pwm->tls_error = 0;
 421 #endif
 422   rc = GPG_ERR_UNSUPPORTED_PROTOCOL;
 423
 424   if (p && *p == '/')
 425     rc = connect_uds (pwm, p);
 426   else if (!p || !strncmp (p, "file://", 7))
 427     {
 428       if (p)
 429         p += 7;
 430 #ifdef DEFAULT_PWMD_SOCKET
 431       else
 432         p = DEFAULT_PWMD_SOCKET;
 433 #endif
 434       rc = connect_uds (pwm, p);
 435     }
 436   else if (!strncmp (p, "ssh://", 6) || !strncmp (p, "ssh6://", 7) ||
 437            !strncmp (p, "ssh4://", 7))
 438     {
 439 #ifndef WITH_SSH
 440       return FINISH (GPG_ERR_NOT_IMPLEMENTED);
 441 #else
 442       char *host = NULL;
 443       int port;
 444       char *username = NULL;
 445
 446       if (!strncmp (p, "ssh6://", 7))
 447         {
 448           pwm->prot = PWMD_IPV6;
 449           p += 7;
 450         }
 451       else if (!strncmp (p, "ssh4://", 7))
 452         {
 453           pwm->prot = PWMD_IPV4;
 454           p += 7;
 455         }
 456       else
 457         {
 458           pwm->prot = PWMD_IP_ANY;
 459           p += 6;
 460         }
 461
 462       rc = _parse_ssh_url (p, &host, &port, &username);
 463       if (!rc)
 464         {
 465           va_list ap;
 466           char *identity = NULL;
 467           char *knownhosts = NULL;
 468
 469           va_start (ap, url);
 470           identity = va_arg (ap, char *);
 471
 472           if (!identity && !pwm->use_agent)
 473             rc = GPG_ERR_INV_ARG;
 474           else
 475             knownhosts = va_arg (ap, char *);
 476
 477           va_end (ap);
 478
 479           if (!rc)
 480             rc = _do_ssh_connect (pwm, host, port, identity, username,
 481                                   knownhosts);
 482           if (!rc)
 483             {
 484               rc = _connect_finalize (pwm);
 485               if (rc)
 486                 free_tcp (pwm);
 487             }
 488         }
 489
 490       pwmd_free (host);
 491       pwmd_free (username);
 492       pwm->local_pinentry = 1;
 493       return FINISH (rc);
 494 #endif
 495     }
 496   else if (!strncmp (p, "tls://", 6) || !strncmp (p, "tls6://", 7) ||
 497            !strncmp (p, "tls4://", 7))
 498     {
 499 #ifndef WITH_GNUTLS
 500       return FINISH (GPG_ERR_NOT_IMPLEMENTED);
 501 #else
 502       char *host = NULL;
 503       int port;
 504
 505       if (!strncmp (p, "tls6://", 7))
 506         {
 507           pwm->prot = PWMD_IPV6;
 508           p += 7;
 509         }
 510       else if (!strncmp (p, "tls4://", 7))
 511         {
 512           pwm->prot = PWMD_IPV4;
 513           p += 7;
 514         }
 515       else
 516         {
 517           pwm->prot = PWMD_IP_ANY;
 518           p += 6;
 519         }
 520
 521       rc = _parse_tls_url (p, &host, &port);
 522       if (!rc)
 523         {
 524           va_list ap;
 525           char *clientcert = NULL;
 526           char *clientkey = NULL;
 527           char *cacert = NULL;
 528           char *prio = NULL;
 529           char *server_fp = NULL;
 530
 531           va_start (ap, url);
 532           clientcert = va_arg (ap, char *);
 533
 534           if (!clientcert)
 535             rc = GPG_ERR_INV_ARG;
 536           else
 537             {
 538               clientkey = va_arg (ap, char *);
 539               if (!clientkey)
 540                 rc = GPG_ERR_INV_ARG;
 541               else
 542                 {
 543                   cacert = va_arg (ap, char *);
 544                   if (!cacert)
 545                     rc = GPG_ERR_INV_ARG;
 546                   else
 547                     {
 548                       prio = va_arg (ap, char *);
 549                       server_fp = va_arg (ap, char *);
 550                     }
 551                 }
 552             }
 553
 554           va_end (ap);
 555
 556           if (!rc)
 557             rc = _do_tls_connect (pwm, host, port, clientcert, clientkey,
 558                                   cacert, prio, server_fp, pwm->tls_verify);
 559           if (!rc)
 560             {
 561               rc = _connect_finalize (pwm);
 562               if (rc)
 563                 free_tcp (pwm);
 564             }
 565         }
 566
 567       pwmd_free (host);
 568       pwm->local_pinentry = 1;
 569       return FINISH (rc);
 570 #endif
 571     }
 572
 573   return FINISH (rc);
 574 }
 575
 576 static void
 577 disconnect (pwm_t * pwm)
 578 {
 579   if (!pwm)
 580     return;
 581
 582   if (pwm->ctx)
 583     assuan_release (pwm->ctx);
 584
 585 #if defined(WITH_SSH) || defined(WITH_GNUTLS)
 586   free_tcp (pwm);
 587 #endif
 588   pwm->ctx = NULL;
 589   pwm->fd = -1;
 590 }
 591
 592 void
 593 pwmd_close (pwm_t * pwm)
 594 {
 595   if (!pwm)
 596     return;
 597
 598   disconnect (pwm);
 599   pwmd_free (pwm->pinentry_error);
 600   pwmd_free (pwm->pinentry_desc);
 601   pwmd_free (pwm->pinentry_prompt);
 602   pwmd_free (pwm->pinentry_tty);
 603   pwmd_free (pwm->pinentry_display);
 604   pwmd_free (pwm->pinentry_term);
 605   pwmd_free (pwm->pinentry_lcctype);
 606   pwmd_free (pwm->pinentry_lcmessages);
 607   pwmd_free (pwm->filename);
 608   pwmd_free (pwm->name);
 609   pwmd_free (pwm->passphrase_info);
 610   pwmd_free (pwm->passphrase_hint);
 611
 612 #ifdef WITH_PINENTRY
 613   if (pwm->pctx)
 614     _pinentry_disconnect (pwm);
 615 #endif
 616
 617   pwmd_free (pwm);
 618 }
 619
 620 static gpg_error_t
 621 inquire_realloc_cb (void *data, const void *buffer, size_t len)
 622 {
 623   membuf_t *mem = (membuf_t *) data;
 624   void *p;
 625
 626   if (!buffer)
 627     return 0;
 628
 629   if ((p = pwmd_realloc (mem->buf, mem->len + len)) == NULL)
 630     return gpg_error (GPG_ERR_ENOMEM);
 631
 632   mem->buf = p;
 633   memcpy ((char *) mem->buf + mem->len, buffer, len);
 634   mem->len += len;
 635   return 0;
 636 }
 637
 638 static gpg_error_t
 639 get_password (pwm_t * pwm, char **result, size_t * len,
 640               pwmd_pinentry_t w, int echo)
 641 {
 642   char buf[LINE_MAX] = { 0 }, *p;
 643   struct termios told, tnew;
 644   char *key = NULL;
 645
 646   if (result)
 647     *result = NULL;
 648
 649   if (len)
 650     *len = 0;
 651
 652   if (!isatty (STDIN_FILENO))
 653     {
 654       fprintf (stderr, N_("Input is not from a terminal! Failing.\n"));
 655       return GPG_ERR_ENOTTY;
 656     }
 657
 658   if (!echo)
 659     {
 660       if (tcgetattr (STDIN_FILENO, &told) == -1)
 661         return gpg_error_from_syserror ();
 662
 663       memcpy (&tnew, &told, sizeof (struct termios));
 664       tnew.c_lflag &= ~(ECHO);
 665       tnew.c_lflag |= ICANON | ECHONL;
 666
 667       if (tcsetattr (STDIN_FILENO, TCSANOW, &tnew) == -1)
 668         {
 669           int n = errno;
 670
 671           tcsetattr (STDIN_FILENO, TCSANOW, &told);
 672           return gpg_error_from_errno (n);
 673         }
 674     }
 675
 676   switch (w)
 677     {
 678     case PWMD_PINENTRY_OPEN:
 679       fprintf (stderr, N_("Password for %s: "), pwm->filename);
 680       break;
 681     case PWMD_PINENTRY_OPEN_FAILED:
 682       fprintf (stderr, N_("Invalid password. Password for %s: "),
 683                pwm->filename);
 684       break;
 685     case PWMD_PINENTRY_SAVE:
 686       fprintf (stderr, N_("New password for %s: "), pwm->filename);
 687       break;
 688     case PWMD_PINENTRY_SAVE_CONFIRM:
 689       fprintf (stderr, N_("Confirm password: "));
 690       break;
 691     default:
 692       break;
 693     }
 694
 695   if ((p = fgets (buf, sizeof (buf), stdin)) == NULL)
 696     {
 697       if (!echo)
 698         tcsetattr (STDIN_FILENO, TCSANOW, &told);
 699       return 0;
 700     }
 701
 702   if (!echo)
 703     tcsetattr (STDIN_FILENO, TCSANOW, &told);
 704
 705   if (feof (stdin))
 706     {
 707       clearerr (stdin);
 708       return GPG_ERR_CANCELED;
 709     }
 710
 711   /* Strip the newline character. */
 712   p[strlen (p) - 1] = 0;
 713
 714   if (buf[0])
 715     {
 716       key = pwmd_strdup_printf ("%s", p);
 717       memset (buf, 0, sizeof (buf));
 718       if (!key)
 719         return GPG_ERR_ENOMEM;
 720
 721       if (result)
 722         *result = key;
 723
 724       if (len)
 725         *len = strlen (key);
 726     }
 727   else
 728     {
 729       if (result)
 730         *result = pwmd_strdup ("");
 731
 732       if (len)
 733         *len = 1;
 734     }
 735
 736   return 0;
 737 }
 738
 739 gpg_error_t
 740 pwmd_password (pwm_t * pwm, const char *keyword, char **data, size_t * size)
 741 {
 742   gpg_error_t rc;
 743   int new_password = 0;
 744   char *password = NULL, *newpass = NULL;
 745   int error = 0;
 746
 747   if (data)
 748     *data = NULL;
 749
 750   if (size)
 751     *size = 0;
 752
 753   if (!strcmp (keyword, "NEW_PASSPHRASE"))
 754     new_password = 1;
 755
 756   if (!new_password && pwm->pinentry_try)
 757     error = 1;
 758
 759 again:
 760   if (pwm->disable_pinentry)
 761     {
 762       rc = get_password (pwm, &password, size,
 763                          new_password ? PWMD_PINENTRY_SAVE :
 764                          error ? PWMD_PINENTRY_OPEN_FAILED :
 765                          PWMD_PINENTRY_OPEN, 0);
 766       if (!rc && new_password)
 767         rc = get_password (pwm, &newpass, size, PWMD_PINENTRY_SAVE_CONFIRM,
 768                            0);
 769     }
 770   else
 771     {
 772       pwmd_pinentry_t which;
 773
 774       if (error)
 775         which = new_password
 776           ? PWMD_PINENTRY_SAVE_FAILED : PWMD_PINENTRY_OPEN_FAILED;
 777       else
 778         which = new_password ? PWMD_PINENTRY_SAVE : PWMD_PINENTRY_OPEN;
 779
 780       rc = pwmd_getpin (pwm, pwm->filename, &password, size, which);
 781       if (!rc && new_password)
 782         rc = pwmd_getpin (pwm, pwm->filename, &newpass, size,
 783                           PWMD_PINENTRY_SAVE_CONFIRM);
 784     }
 785
 786   if (!rc && new_password)
 787     {
 788       if ((!password && newpass) || (!newpass && password)
 789           || (newpass && password && strcmp (newpass, password)))
 790         {
 791           if (pwm->disable_pinentry)
 792             fprintf (stderr, N_("Passphrases do not match.\n"));
 793
 794           pwmd_free (password);
 795           pwmd_free (newpass);
 796           password = newpass = NULL;
 797           error = 1;
 798           goto again;
 799         }
 800     }
 801
 802   (void) pwmd_getpin (pwm, pwm->filename, NULL, NULL, PWMD_PINENTRY_CLOSE);
 803   pwmd_free (newpass);
 804   if (!rc && data)
 805     *data = password;
 806
 807   return rc;
 808 }
 809
 810 static gpg_error_t
 811 inquire_cb (void *data, const char *keyword)
 812 {
 813   pwm_t *pwm = (pwm_t *) data;
 814   gpg_error_t rc = 0;
 815   int free_result = 0;
 816   char *result = NULL;
 817   int is_password = 0;
 818   int new_password = 0;
 819
 820   if (!strcmp (keyword, "PASSPHRASE"))
 821     is_password = 1;
 822   else if (!strcmp (keyword, "NEW_PASSPHRASE"))
 823     new_password = 1;
 824
 825   /* Shouldn't get this far without a callback. */
 826   if (!pwm->override_inquire && !pwm->inquire_func
 827       && !is_password && !new_password)
 828     return gpg_error (GPG_ERR_ASS_NO_INQUIRE_CB);
 829
 830   for (;;)
 831     {
 832       size_t len = 0;
 833       gpg_error_t arc;
 834
 835       result = NULL;
 836
 837       if (!pwm->override_inquire && (is_password || new_password))
 838         {
 839           free_result = 1;
 840           rc = pwmd_password (data, keyword, &result, &len);
 841           if (!rc)
 842             rc = GPG_ERR_EOF;
 843         }
 844       else
 845         rc = pwm->inquire_func (pwm->inquire_data, keyword, rc, &result,
 846                                 &len);
 847
 848     cancel:
 849       if (rc && gpg_err_code (rc) != GPG_ERR_EOF)
 850         {
 851 #ifndef LIBASSUAN_2_1_0
 852           gpg_error_t trc = rc;
 853
 854           /* Cancel this inquire. */
 855           rc = assuan_send_data (pwm->ctx, NULL, 1);
 856           if (!rc)
 857             {
 858               char *line;
 859               size_t len;
 860
 861               /* There is a bug (or feature?) in assuan_send_data() that
 862                * when cancelling an inquire the next read from the server is
 863                * not done until the next command making the next command
 864                * fail with GPG_ERR_ASS_UNEXPECTED_CMD.
 865                */
 866               rc = assuan_read_line (pwm->ctx, &line, &len);
 867
 868               /* Restore the original error. This differs from the error
 869                * returned from the pwmd command (GPG_ERR_CANCELED). This
 870                * error is returned to the calling function.
 871                */
 872               if (!rc)
 873                 rc = trc;
 874             }
 875 #endif
 876           break;
 877         }
 878
 879       if (gpg_err_code (rc) == GPG_ERR_EOF || !rc)
 880         {
 881           if (len <= 0 && !result)
 882             {
 883               rc = 0;
 884               break;
 885             }
 886           else if ((len <= 0 && result) || (len && !result))
 887             {
 888               rc = gpg_error (GPG_ERR_INV_ARG);
 889               break;
 890             }
 891
 892           if (pwm->inquire_maxlen
 893               && pwm->inquire_sent + len > pwm->inquire_maxlen)
 894             {
 895               rc = gpg_error (GPG_ERR_TOO_LARGE);
 896               if (!free_result)
 897                 rc = pwm->inquire_func (pwm->inquire_data, keyword, rc,
 898                                         &result, &len);
 899               goto cancel;
 900             }
 901
 902           arc = assuan_send_data (pwm->ctx, result, len);
 903           if (gpg_err_code (rc) == GPG_ERR_EOF)
 904             {
 905               rc = arc;
 906               break;
 907             }
 908
 909           rc = arc;
 910         }
 911       else if (rc)
 912         break;
 913
 914       if (!rc)
 915         {
 916           pwm->inquire_sent += len;
 917
 918           if (pwm->status_func)
 919             {
 920               char buf[ASSUAN_LINELENGTH];
 921
 922               snprintf (buf, sizeof (buf), "XFER %lu %lu", pwm->inquire_sent,
 923                         pwm->inquire_total);
 924               rc = pwm->status_func (pwm->status_data, buf);
 925               if (rc)
 926                 continue;
 927             }
 928         }
 929     }
 930
 931   if (free_result)
 932     pwmd_free (result);
 933
 934   return rc;
 935 }
 936
 937 static gpg_error_t
 938 parse_assuan_line (pwm_t * pwm)
 939 {
 940   gpg_error_t rc;
 941   char *line;
 942   size_t len;
 943
 944   rc = assuan_read_line (pwm->ctx, &line, &len);
 945   if (!rc)
 946     {
 947       if (line[0] == 'O' && line[1] == 'K' &&
 948           (line[2] == 0 || line[2] == ' '))
 949         {
 950         }
 951       else if (line[0] == '#')
 952         {
 953         }
 954       else if (line[0] == 'S' && (line[1] == 0 || line[1] == ' '))
 955         {
 956           if (pwm->status_func)
 957             {
 958               rc = pwm->status_func (pwm->status_data,
 959                                      line[1] == 0 ? line + 1 : line + 2);
 960             }
 961         }
 962       else if (line[0] == 'E' && line[1] == 'R' && line[2] == 'R' &&
 963                (line[3] == 0 || line[3] == ' '))
 964         {
 965           line += 4;
 966           rc = strtol (line, NULL, 10);
 967         }
 968     }
 969
 970   return rc;
 971 }
 972
 973 static void
 974 reset_handle (pwm_t *pwm)
 975 {
 976   pwm->fd = -1;
 977   pwm->pinentry_disabled = 0;
 978 #ifdef WITH_PINENTRY
 979   if (pwm->pctx)
 980     _pinentry_disconnect (pwm);
 981 #endif
 982 #if defined(WITH_SSH) || defined(WITH_GNUTLS)
 983 #ifdef WITH_GNUTLS
 984   pwm->tls_error = 0;
 985 #endif
 986
 987   if (pwm->tcp)
 988     pwm->tcp->rc = 0;
 989 #endif
 990 }
 991
 992 gpg_error_t
 993 pwmd_disconnect (pwm_t * pwm)
 994 {
 995   if (!pwm)
 996     return FINISH (GPG_ERR_INV_ARG);
 997
 998   if (pwm->fd == -1)
 999     return FINISH (GPG_ERR_INV_STATE);
1000
1001   disconnect (pwm);
1002   reset_handle (pwm);
1003   return 0;
1004 }
1005
1006 /* Note that this should only be called when not in a command. */
1007 gpg_error_t
1008 pwmd_process (pwm_t * pwm)
1009 {
1010   gpg_error_t rc = 0;
1011   fd_set fds;
1012   struct timeval tv = { 0, 0 };
1013   int n;
1014
1015   if (!pwm || pwm->fd == -1)
1016     return FINISH (GPG_ERR_INV_ARG);
1017   else if (!pwm->ctx)
1018     return FINISH (GPG_ERR_INV_STATE);
1019
1020   FD_ZERO (&fds);
1021   FD_SET (pwm->fd, &fds);
1022   n = select (pwm->fd + 1, &fds, NULL, NULL, &tv);
1023
1024   if (n == -1)
1025     return FINISH (gpg_error_from_syserror ());
1026
1027   if (n > 0)
1028     {
1029       if (FD_ISSET (pwm->fd, &fds))
1030         rc = parse_assuan_line (pwm);
1031     }
1032
1033   while (!rc && assuan_pending_line (pwm->ctx))
1034     rc = parse_assuan_line (pwm);
1035
1036 #if defined (WITH_SSH) || defined (WITH_GNUTLS)
1037   if (gpg_err_code (rc) == GPG_ERR_EOF && pwm->tcp)
1038     {
1039       close (pwm->fd);
1040       pwm->fd = -1;
1041     }
1042 #endif
1043
1044   return FINISH (rc);
1045 }
1046
1047 static gpg_error_t
1048 status_cb (void *data, const char *line)
1049 {
1050   pwm_t *pwm = data;
1051
1052   if (!strncmp (line, "INQUIRE_MAXLEN ", 15))
1053     pwm->inquire_maxlen = strtol (line + 15, NULL, 10);
1054   else if (!strncmp (line, "PASSPHRASE_HINT ", 16))
1055     {
1056       pwmd_free (pwm->passphrase_hint);
1057       pwm->passphrase_hint = pwmd_strdup (line+16);
1058     }
1059   else if (!strncmp (line, "PASSPHRASE_INFO ", 16))
1060     {
1061       pwmd_free (pwm->passphrase_info);
1062       pwm->passphrase_info = pwmd_strdup (line+16);
1063     }
1064
1065   if (pwm->status_func)
1066     return pwm->status_func (pwm->status_data, line);
1067
1068   return 0;
1069 }
1070
1071 gpg_error_t
1072 _assuan_command (pwm_t * pwm, assuan_context_t ctx,
1073                  char **result, size_t * len, const char *cmd)
1074 {
1075   membuf_t data;
1076   gpg_error_t rc;
1077
1078   if (!cmd || !*cmd)
1079     return FINISH (GPG_ERR_INV_ARG);
1080
1081   if (strlen (cmd) >= ASSUAN_LINELENGTH + 1)
1082     return FINISH (GPG_ERR_LINE_TOO_LONG);
1083
1084   data.len = 0;
1085   data.buf = NULL;
1086   rc = assuan_transact (ctx, cmd, inquire_realloc_cb, &data,
1087 #ifdef WITH_QUALITY
1088                         pwm->pctx == ctx ? pwm->_inquire_func : inquire_cb,
1089                         pwm->pctx == ctx ? pwm->_inquire_data : pwm,
1090 #else
1091                         inquire_cb, pwm,
1092 #endif
1093                         status_cb, pwm);
1094
1095   if (rc)
1096     {
1097       if (data.buf)
1098         {
1099           pwmd_free (data.buf);
1100           data.buf = NULL;
1101         }
1102     }
1103   else
1104     {
1105       if (data.buf)
1106         {
1107           inquire_realloc_cb (&data, "", 1);
1108
1109           if (result)
1110             *result = (char *) data.buf;
1111           else
1112             pwmd_free (data.buf);
1113
1114           if (len)
1115             *len = data.len;
1116         }
1117     }
1118
1119   pwm->inquire_maxlen = 0;
1120   return rc;
1121 }
1122
1123 gpg_error_t
1124 pwmd_command_ap (pwm_t * pwm, char **result, size_t * rlen,
1125                  pwmd_inquire_cb_t func, void *user, const char *cmd,
1126                  va_list ap)
1127 {
1128   char *buf;
1129   size_t len;
1130   va_list ap2;
1131
1132   if (result)
1133     *result = NULL;
1134
1135   if (rlen)
1136     *rlen = 0;
1137
1138   if (!pwm || !cmd)
1139     return FINISH (GPG_ERR_INV_ARG);
1140   if (!pwm->ctx)
1141     return FINISH (GPG_ERR_INV_STATE);
1142
1143   /*
1144    * C99 allows the dst pointer to be null which will calculate the length
1145    * of the would-be result and return it.
1146    */
1147   va_copy (ap2, ap);
1148   len = vsnprintf (NULL, 0, cmd, ap) + 1;
1149   buf = (char *) pwmd_malloc (len);
1150   if (!buf)
1151     {
1152       va_end (ap2);
1153       return FINISH (GPG_ERR_ENOMEM);
1154     }
1155
1156   len = vsnprintf (buf, len, cmd, ap2);
1157   va_end (ap2);
1158
1159   if (buf[strlen (buf) - 1] == '\n')
1160     buf[strlen (buf) - 1] = 0;
1161   if (buf[strlen (buf) - 1] == '\r')
1162     buf[strlen (buf) - 1] = 0;
1163
1164   pwm->inquire_func = func;
1165   pwm->inquire_data = user;
1166   pwm->inquire_sent = 0;
1167   gpg_error_t rc = _assuan_command (pwm, pwm->ctx, result, rlen, buf);
1168   pwmd_free (buf);
1169   return rc;
1170 }
1171
1172 gpg_error_t
1173 pwmd_command (pwm_t * pwm, char **result, size_t * len,
1174               pwmd_inquire_cb_t func, void *user, const char *cmd, ...)
1175 {
1176   va_list ap;
1177
1178   if (result)
1179     *result = NULL;
1180
1181   if (len)
1182     *len = 0;
1183
1184   if (!pwm || !cmd)
1185     return FINISH (GPG_ERR_INV_ARG);
1186   if (!pwm->ctx)
1187     return FINISH (GPG_ERR_INV_STATE);
1188
1189   va_start (ap, cmd);
1190   gpg_error_t rc = pwmd_command_ap (pwm, result, len, func, user, cmd, ap);
1191   va_end (ap);
1192   return rc;
1193 }
1194
1195 static gpg_error_t
1196 send_pinentry_options (pwm_t * pwm)
1197 {
1198   gpg_error_t rc;
1199
1200   // Pwmd >= 3.1 uses gpgme to do the pinentry settings.
1201   if (pwm->version && pwm->version >= 0x030100)
1202     return 0;
1203
1204   rc = pwmd_command (pwm, NULL, NULL, NULL, NULL,
1205                      "OPTION disable-pinentry=0");
1206   if (!rc && pwm->pinentry_tty)
1207     rc = pwmd_command (pwm, NULL, NULL, NULL, NULL, "OPTION TTYNAME=%s",
1208                        pwm->pinentry_tty);
1209
1210   if (!rc && pwm->pinentry_term)
1211     rc = pwmd_command (pwm, NULL, NULL, NULL, NULL, "OPTION TTYTYPE=%s",
1212                        pwm->pinentry_term);
1213
1214   if (!rc && pwm->pinentry_display)
1215     rc = pwmd_command (pwm, NULL, NULL, NULL, NULL, "OPTION DISPLAY=%s",
1216                        pwm->pinentry_display);
1217
1218   if (!rc && pwm->pinentry_desc)
1219     rc = pwmd_command (pwm, NULL, NULL, NULL, NULL, "OPTION DESC=%s",
1220                        pwm->pinentry_desc);
1221
1222   if (!rc && pwm->pinentry_lcctype)
1223     rc = pwmd_command (pwm, NULL, NULL, NULL, NULL, "OPTION LC_CTYPE=%s",
1224                        pwm->pinentry_lcctype);
1225
1226   if (!rc && pwm->pinentry_lcmessages)
1227     rc = pwmd_command (pwm, NULL, NULL, NULL, NULL, "OPTION LC_MESSAGES=%s",
1228                        pwm->pinentry_lcmessages);
1229
1230   if (!rc && pwm->pinentry_timeout >= 0)
1231     rc = pwmd_command (pwm, NULL, NULL, NULL, NULL,
1232                        "OPTION pinentry-timeout=%i", pwm->pinentry_timeout);
1233
1234   return rc;
1235 }
1236
1237 gpg_error_t
1238 pwmd_socket_type (pwm_t * pwm, pwmd_socket_t * result)
1239 {
1240   if (!pwm || !result)
1241     return FINISH (GPG_ERR_INV_ARG);
1242
1243   *result = PWMD_SOCKET_LOCAL;
1244
1245   if (pwm->fd == -1)
1246     return FINISH (GPG_ERR_INV_STATE);
1247
1248 #if defined(WITH_SSH) || defined(WITH_GNUTLS)
1249 #ifdef WITH_SSH
1250   if (pwm->tcp && pwm->tcp->ssh)
1251     *result = PWMD_SOCKET_SSH;
1252 #endif
1253 #ifdef WITH_GNUTLS
1254   if (pwm->tcp && pwm->tcp->tls)
1255     *result = PWMD_SOCKET_TLS;
1256 #endif
1257 #endif
1258   return 0;
1259 }
1260
1261 static gpg_error_t
1262 disable_pinentry (pwm_t *pwm, int *disable)
1263 {
1264   gpg_error_t rc;
1265 #if defined(WITH_SSH) || defined(WITH_GNUTLS)
1266   int no_pinentry = pwm->disable_pinentry || pwm->tcp || pwm->local_pinentry;
1267 #else
1268   int no_pinentry = pwm->disable_pinentry || pwm->local_pinentry;
1269 #endif
1270
1271   if (disable)
1272     *disable = no_pinentry;
1273
1274   if (pwm->pinentry_disabled && no_pinentry)
1275     return 0;
1276   else if (!pwm->pinentry_disabled && !no_pinentry)
1277     return 0;
1278
1279   rc = pwmd_command (pwm, NULL, NULL, NULL, NULL, "OPTION disable-pinentry=%i",
1280                      no_pinentry);
1281   if (!rc)
1282     pwm->pinentry_disabled = no_pinentry;
1283
1284   return rc;
1285 }
1286
1287 gpg_error_t
1288 pwmd_open (pwm_t * pwm, const char *filename, pwmd_inquire_cb_t cb,
1289            void *data)
1290 {
1291   gpg_error_t rc = 0;
1292   int no_pinentry = 0;
1293
1294   if (!pwm || !filename || !*filename)
1295     return FINISH (GPG_ERR_INV_ARG);
1296
1297   if (!pwm->ctx)
1298     return FINISH (GPG_ERR_INV_STATE);
1299
1300   rc = disable_pinentry (pwm, &no_pinentry);
1301   if (!rc && !no_pinentry)
1302     rc = send_pinentry_options (pwm);
1303
1304   if (!rc)
1305     {
1306       pwm->pinentry_try = 0;
1307       pwmd_free (pwm->filename);
1308       pwm->filename = pwmd_strdup (filename);
1309
1310       do
1311         {
1312           rc = pwmd_command (pwm, NULL, NULL, cb, data, "OPEN %s%s",
1313                              (pwm->opts & OPT_LOCK_ON_OPEN) ? "--lock " : "",
1314                              filename);
1315         }
1316       while (gpg_err_code (rc) == GPG_ERR_BAD_PASSPHRASE
1317              && pwm->pinentry_disabled
1318              && ++pwm->pinentry_try < pwm->pinentry_tries);
1319
1320       pwm->pinentry_try = 0;
1321
1322       if (rc)
1323         {
1324           pwmd_free (pwm->filename);
1325           pwm->filename = NULL;
1326         }
1327     }
1328
1329   return FINISH (rc);
1330 }
1331
1332 static gpg_error_t
1333 do_pwmd_save_passwd (pwm_t * pwm, const char *args, pwmd_inquire_cb_t cb,
1334                      void *data, int save)
1335 {
1336   gpg_error_t rc = 0;
1337
1338   if (!pwm)
1339     return FINISH (GPG_ERR_INV_ARG);
1340   if (!pwm->ctx)
1341     return FINISH (GPG_ERR_INV_STATE);
1342
1343   rc = disable_pinentry (pwm, NULL);
1344   if (!rc)
1345     rc = pwmd_command (pwm, NULL, NULL, cb, data,
1346                        save ? "SAVE %s" : "PASSWD %s", args ? args : "");
1347
1348   return FINISH (rc);
1349 }
1350
1351 gpg_error_t
1352 pwmd_passwd (pwm_t * pwm, const char *args, pwmd_inquire_cb_t cb, void *data)
1353 {
1354   return do_pwmd_save_passwd (pwm, args, cb, data, 0);
1355 }
1356
1357 gpg_error_t
1358 pwmd_save (pwm_t * pwm, const char *args, pwmd_inquire_cb_t cb, void *data)
1359 {
1360   return do_pwmd_save_passwd (pwm, args, cb, data, 1);
1361 }
1362
1363 static gpg_error_t
1364 pwmd_get_set_opt (pwm_t *pwm, pwmd_option_t opt, int get, va_list ap)
1365 {
1366   int n, *intp;
1367   size_t *sizetp;
1368   char *arg1, **charpp;
1369   gpg_error_t rc = 0;
1370
1371   if (!pwm)
1372     return GPG_ERR_INV_ARG;
1373
1374   switch (opt)
1375     {
1376     case PWMD_OPTION_SERVER_VERSION:
1377       if (!get)
1378         return GPG_ERR_NOT_SUPPORTED;
1379
1380       if (!pwm)
1381         rc = GPG_ERR_INV_ARG;
1382       else if (!pwm->ctx)
1383         rc = GPG_ERR_INV_STATE;
1384       else
1385         {
1386           unsigned *u = va_arg (ap, unsigned *);
1387           *u = pwm->version;
1388         }
1389
1390       break;
1391     case PWMD_OPTION_SIGPIPE:
1392       if (get)
1393         {
1394           intp = va_arg (ap, int *);
1395           *intp = pwm->opts & OPT_SIGPIPE ? 1 : 0;
1396           break;
1397         }
1398
1399       n = va_arg (ap, int);
1400       if (n < 0 || n > 1)
1401         rc = GPG_ERR_INV_VALUE;
1402
1403       if (n)
1404         pwm->opts |= OPT_SIGPIPE;
1405       else
1406         pwm->opts &= ~OPT_SIGPIPE;
1407
1408       break;
1409     case PWMD_OPTION_LOCK_ON_OPEN:
1410       if (get)
1411         {
1412           intp = va_arg (ap, int *);
1413           *intp = pwm->opts & OPT_LOCK_ON_OPEN ? 1 : 0;
1414           break;
1415         }
1416
1417       n = va_arg (ap, int);
1418
1419       if (n < 0 || n > 1)
1420         rc = GPG_ERR_INV_VALUE;
1421
1422       if (n)
1423         pwm->opts |= OPT_LOCK_ON_OPEN;
1424       else
1425         pwm->opts &= ~OPT_LOCK_ON_OPEN;
1426
1427       break;
1428     case PWMD_OPTION_INQUIRE_TOTAL:
1429       if (get)
1430         {
1431           sizetp = va_arg (ap, size_t *);
1432           *sizetp = pwm->inquire_total;
1433           break;
1434         }
1435
1436       pwm->inquire_total = va_arg (ap, size_t);
1437       break;
1438     case PWMD_OPTION_STATUS_CB:
1439       if (get)
1440         {
1441           pwmd_status_cb_t *cb = va_arg (ap, pwmd_status_cb_t *);
1442
1443           *cb = pwm->status_func;
1444           break;
1445         }
1446
1447       pwm->status_func = va_arg (ap, pwmd_status_cb_t);
1448       break;
1449     case PWMD_OPTION_STATUS_DATA:
1450       if (get)
1451         {
1452           void **data = va_arg (ap, void **);
1453
1454           *data = pwm->status_data;
1455           break;
1456         }
1457
1458       pwm->status_data = va_arg (ap, void *);
1459       break;
1460     case PWMD_OPTION_NO_PINENTRY:
1461       if (get)
1462         {
1463           intp = va_arg (ap, int *);
1464           *intp = pwm->disable_pinentry;
1465           break;
1466         }
1467
1468       n = va_arg (ap, int);
1469
1470       if (n < 0 || n > 1)
1471         rc = GPG_ERR_INV_VALUE;
1472       else
1473         pwm->disable_pinentry = n;
1474
1475       if (!rc && pwm->ctx)
1476         rc = disable_pinentry (pwm, NULL);
1477       break;
1478     case PWMD_OPTION_LOCAL_PINENTRY:
1479       if (get)
1480         {
1481           intp = va_arg (ap, int *);
1482           *intp = pwm->local_pinentry;
1483           break;
1484         }
1485
1486       n = va_arg (ap, int);
1487
1488       if (n < 0 || n > 1)
1489         rc = GPG_ERR_INV_VALUE;
1490       else
1491         pwm->local_pinentry = n;
1492
1493       break;
1494     case PWMD_OPTION_PINENTRY_TIMEOUT:
1495       if (get)
1496         {
1497           intp = va_arg (ap, int *);
1498           *intp = pwm->pinentry_timeout;
1499           break;
1500         }
1501
1502       n = va_arg (ap, int);
1503
1504       if (n < 0)
1505         rc = GPG_ERR_INV_VALUE;
1506       else
1507         pwm->pinentry_timeout = n;
1508
1509 #if defined(WITH_SSH) || defined(WITH_GNUTLS)
1510       if (!rc && pwm->fd != -1 && !pwm->tcp)
1511 #else
1512       if (!rc && pwm->fd != -1)
1513 #endif
1514         rc = pwmd_command (pwm, NULL, NULL, NULL, NULL,
1515                            "OPTION pinentry-timeout=%i", pwm->pinentry_timeout);
1516       break;
1517     case PWMD_OPTION_PINENTRY_TRIES:
1518       if (get)
1519         {
1520           intp = va_arg (ap, int *);
1521           *intp = pwm->pinentry_tries;
1522           break;
1523         }
1524
1525       n = va_arg (ap, int);
1526       pwm->pinentry_tries = n;
1527       break;
1528     case PWMD_OPTION_PINENTRY_PATH:
1529       if (get)
1530         {
1531           charpp = va_arg (ap, char **);
1532           *charpp = pwm->pinentry_path;
1533           break;
1534         }
1535
1536       arg1 = va_arg (ap, char *);
1537       pwmd_free (pwm->pinentry_path);
1538       pwm->pinentry_path = arg1 ? _expand_homedir (arg1, NULL) : NULL;
1539       break;
1540     case PWMD_OPTION_PINENTRY_TTY:
1541       if (get)
1542         {
1543           charpp = va_arg (ap, char **);
1544           *charpp = pwm->pinentry_tty;
1545           break;
1546         }
1547
1548       arg1 = va_arg (ap, char *);
1549       pwmd_free (pwm->pinentry_tty);
1550       pwm->pinentry_tty = arg1 ? pwmd_strdup (arg1) : NULL;
1551       break;
1552     case PWMD_OPTION_PINENTRY_DISPLAY:
1553       if (get)
1554         {
1555           charpp = va_arg (ap, char **);
1556           *charpp = pwm->pinentry_display;
1557           break;
1558         }
1559
1560       arg1 = va_arg (ap, char *);
1561       pwmd_free (pwm->pinentry_display);
1562       pwm->pinentry_display = arg1 ? pwmd_strdup (arg1) : NULL;
1563       break;
1564     case PWMD_OPTION_PINENTRY_TERM:
1565       if (get)
1566         {
1567           charpp = va_arg (ap, char **);
1568           *charpp = pwm->pinentry_term;
1569           break;
1570         }
1571
1572       arg1 = va_arg (ap, char *);
1573       pwmd_free (pwm->pinentry_term);
1574       pwm->pinentry_term = arg1 ? pwmd_strdup (arg1) : NULL;
1575       break;
1576     case PWMD_OPTION_PINENTRY_ERROR:
1577       if (get)
1578         {
1579           charpp = va_arg (ap, char **);
1580           *charpp = pwm->pinentry_error;
1581           break;
1582         }
1583
1584       arg1 = va_arg (ap, char *);
1585       pwmd_free (pwm->pinentry_error);
1586       pwm->pinentry_error = arg1 ? _percent_escape (arg1) : NULL;
1587       break;
1588     case PWMD_OPTION_PINENTRY_PROMPT:
1589       if (get)
1590         {
1591           charpp = va_arg (ap, char **);
1592           *charpp = pwm->pinentry_prompt;
1593           break;
1594         }
1595
1596       arg1 = va_arg (ap, char *);
1597       pwmd_free (pwm->pinentry_prompt);
1598       pwm->pinentry_prompt = arg1 ? _percent_escape (arg1) : NULL;
1599       break;
1600     case PWMD_OPTION_PINENTRY_DESC:
1601       if (get)
1602         {
1603           charpp = va_arg (ap, char **);
1604           *charpp = pwm->pinentry_desc;
1605           break;
1606         }
1607
1608       arg1 = va_arg (ap, char *);
1609       pwmd_free (pwm->pinentry_desc);
1610       pwm->pinentry_desc = arg1 ? _percent_escape (arg1) : NULL;
1611       break;
1612     case PWMD_OPTION_PINENTRY_LC_CTYPE:
1613       if (get)
1614         {
1615           charpp = va_arg (ap, char **);
1616           *charpp = pwm->pinentry_lcctype;
1617           break;
1618         }
1619
1620       arg1 = va_arg (ap, char *);
1621       pwmd_free (pwm->pinentry_lcctype);
1622       pwm->pinentry_lcctype = arg1 ? pwmd_strdup (arg1) : NULL;
1623       break;
1624     case PWMD_OPTION_PINENTRY_LC_MESSAGES:
1625       if (get)
1626         {
1627           charpp = va_arg (ap, char **);
1628           *charpp = pwm->pinentry_lcmessages;
1629           break;
1630         }
1631
1632       arg1 = va_arg (ap, char *);
1633       pwmd_free (pwm->pinentry_lcmessages);
1634       pwm->pinentry_lcmessages = arg1 ? pwmd_strdup (arg1) : NULL;
1635       break;
1636     case PWMD_OPTION_KNOWNHOST_CB:
1637       if (get)
1638         {
1639           pwmd_knownhost_cb_t *cb = va_arg (ap, pwmd_knownhost_cb_t *);
1640
1641           *cb = pwm->kh_cb;
1642           break;
1643         }
1644
1645       pwm->kh_cb = va_arg (ap, pwmd_knownhost_cb_t);
1646       break;
1647     case PWMD_OPTION_KNOWNHOST_DATA:
1648       if (get)
1649         {
1650           void **data = va_arg (ap, void **);
1651
1652           *data = pwm->kh_data;
1653           break;
1654         }
1655
1656       pwm->kh_data = va_arg (ap, void *);
1657       break;
1658     case PWMD_OPTION_SSH_AGENT:
1659       if (get)
1660         {
1661           intp = va_arg (ap, int *);
1662           *intp = pwm->use_agent;
1663           break;
1664         }
1665
1666       pwm->use_agent = va_arg (ap, int);
1667
1668       if (pwm->use_agent < 0 || pwm->use_agent > 1)
1669         {
1670           pwm->use_agent = 0;
1671           rc = GPG_ERR_INV_VALUE;
1672         }
1673       break;
1674     case PWMD_OPTION_TLS_VERIFY:
1675       if (get)
1676         {
1677           intp = va_arg (ap, int *);
1678           *intp = pwm->tls_verify;
1679           break;
1680         }
1681
1682       pwm->tls_verify = va_arg (ap, int);
1683
1684       if (pwm->tls_verify < 0 || pwm->tls_verify > 1)
1685         {
1686           pwm->tls_verify = 0;
1687           rc = GPG_ERR_INV_VALUE;
1688         }
1689       break;
1690     case PWMD_OPTION_SOCKET_TIMEOUT:
1691       if (get)
1692         {
1693           intp = va_arg (ap, int *);
1694           *intp = pwm->socket_timeout;
1695           break;
1696         }
1697
1698       pwm->socket_timeout = va_arg (ap, int);
1699       if (pwm->socket_timeout < 0)
1700         {
1701           pwm->socket_timeout = 0;
1702           rc = GPG_ERR_INV_VALUE;
1703         }
1704
1705 #ifdef WITH_SSH
1706       if (pwm->tcp && pwm->tcp->ssh && pwm->tcp->ssh->session)
1707         {
1708           pwm->tcp->ssh->timeout = pwm->socket_timeout;
1709           libssh2_session_set_timeout (pwm->tcp->ssh->session,
1710                                        pwm->socket_timeout * 1000);
1711         }
1712 #endif
1713 #ifdef WITH_GNUTLS
1714       if (pwm->tcp && pwm->tcp->tls && pwm->tcp->tls->session)
1715         pwm->tcp->tls->timeout = pwm->socket_timeout;
1716 #endif
1717       break;
1718     case PWMD_OPTION_OVERRIDE_INQUIRE:
1719       if (get)
1720         {
1721           intp = va_arg (ap, int *);
1722           *intp = pwm->override_inquire;
1723           break;
1724         }
1725
1726       pwm->override_inquire = va_arg (ap, int);
1727
1728       if (pwm->override_inquire < 0 || pwm->override_inquire > 1)
1729         {
1730           pwm->override_inquire = 0;
1731           rc = GPG_ERR_INV_VALUE;
1732         }
1733       break;
1734     default:
1735       rc = GPG_ERR_UNKNOWN_OPTION;
1736       break;
1737     }
1738
1739   return FINISH (rc);
1740 }
1741
1742 gpg_error_t
1743 pwmd_setopt (pwm_t * pwm, pwmd_option_t opt, ...)
1744 {
1745   va_list ap;
1746   gpg_error_t rc = 0;
1747
1748   va_start (ap, opt);
1749   rc = pwmd_get_set_opt (pwm, opt, 0, ap);
1750   va_end (ap);
1751   return FINISH (rc);
1752 }
1753
1754 gpg_error_t
1755 pwmd_getopt (pwm_t *pwm, pwmd_option_t opt, ...)
1756 {
1757   va_list ap;
1758   gpg_error_t rc = 0;
1759
1760   va_start (ap, opt);
1761   rc = pwmd_get_set_opt (pwm, opt, 1, ap);
1762   va_end (ap);
1763   return FINISH (rc);
1764 }
1765
1766 gpg_error_t
1767 pwmd_new (const char *name, pwm_t ** pwm)
1768 {
1769   pwm_t *h = pwmd_calloc (1, sizeof (pwm_t));
1770   gpg_error_t rc;
1771
1772   if (!h)
1773     return FINISH (GPG_ERR_ENOMEM);
1774
1775   if (name)
1776     {
1777       h->name = pwmd_strdup (name);
1778       if (!h->name)
1779         {
1780           pwmd_free (h);
1781           return FINISH (GPG_ERR_ENOMEM);
1782         }
1783     }
1784
1785   reset_handle (h);
1786   h->pinentry_timeout = -1;
1787   h->pinentry_tries = 3;
1788 #if defined(WITH_SSH) || defined(WITH_GNUTLS)
1789   h->prot = PWMD_IP_ANY;
1790 #endif
1791
1792   if (ttyname (STDOUT_FILENO))
1793     {
1794       char buf[256];
1795
1796       ttyname_r (STDOUT_FILENO, buf, sizeof (buf));
1797       h->pinentry_tty = pwmd_strdup (buf);
1798       if (!h->pinentry_tty)
1799         {
1800           rc = GPG_ERR_ENOMEM;
1801           goto fail;
1802         }
1803     }
1804
1805   if (getenv ("TERM") && h->pinentry_tty)
1806     {
1807       h->pinentry_term = pwmd_strdup (getenv ("TERM"));
1808       if (!h->pinentry_term)
1809         {
1810           rc = GPG_ERR_ENOMEM;
1811           goto fail;
1812         }
1813     }
1814
1815   if (getenv ("DISPLAY"))
1816     {
1817       h->pinentry_display = pwmd_strdup (getenv ("DISPLAY"));
1818       if (!h->pinentry_display)
1819         {
1820           rc = GPG_ERR_ENOMEM;
1821           goto fail;
1822         }
1823     }
1824
1825   update_pinentry_settings (h);
1826   *pwm = h;
1827   return 0;
1828
1829 fail:
1830   pwmd_close (h);
1831   return FINISH (rc);
1832 }
1833
1834 void
1835 pwmd_free (void *ptr)
1836 {
1837   _xfree (ptr);
1838 }
1839
1840 void *
1841 pwmd_malloc (size_t size)
1842 {
1843   return _xmalloc (size);
1844 }
1845
1846 void *
1847 pwmd_calloc (size_t nmemb, size_t size)
1848 {
1849   return _xcalloc (nmemb, size);
1850 }
1851
1852 void *
1853 pwmd_realloc (void *ptr, size_t size)
1854 {
1855   return _xrealloc (ptr, size);
1856 }
1857
1858 char *
1859 pwmd_strdup (const char *str)
1860 {
1861   char *t;
1862   size_t len;
1863   register size_t c;
1864
1865   len = strlen (str);
1866   t = _xmalloc ((len + 1) * sizeof (char));
1867   if (!t)
1868     return NULL;
1869
1870   for (c = 0; c < len; c++)
1871     t[c] = str[c];
1872
1873   t[c] = 0;
1874   return t;
1875 }
1876
1877 char *
1878 pwmd_strdup_printf (const char *fmt, ...)
1879 {
1880   va_list ap, ap2;
1881   int len;
1882   char *buf;
1883
1884   if (!fmt)
1885     return NULL;
1886
1887   va_start (ap, fmt);
1888   va_copy (ap2, ap);
1889   len = vsnprintf (NULL, 0, fmt, ap);
1890   va_end (ap);
1891   buf = pwmd_malloc (++len);
1892   if (buf)
1893     vsnprintf (buf, len, fmt, ap2);
1894
1895   va_end (ap2);
1896   return buf;
1897 }
1898
1899 gpg_error_t
1900 pwmd_getpin (pwm_t * pwm, const char *filename, char **result,
1901              size_t * len, pwmd_pinentry_t which)
1902 {
1903 #ifndef WITH_PINENTRY
1904   return FINISH (GPG_ERR_NOT_IMPLEMENTED);
1905 #else
1906   gpg_error_t rc = _pwmd_getpin (pwm, filename, result, len, which);
1907
1908   return FINISH (rc);
1909 #endif
1910 }
1911
1912 const char *
1913 pwmd_version ()
1914 {
1915   return LIBPWMD_VERSION_STR;
1916 }
1917
1918 unsigned int
1919 pwmd_features ()
1920 {
1921   unsigned int n = 0;
1922
1923 #ifdef WITH_PINENTRY
1924   n |= PWMD_FEATURE_PINENTRY;
1925 #endif
1926 #ifdef WITH_SSH
1927   n |= PWMD_FEATURE_SSH;
1928 #endif
1929 #ifdef WITH_QUALITY
1930   n |= PWMD_FEATURE_CRACK;
1931 #endif
1932 #ifdef WITH_GNUTLS
1933   n |= PWMD_FEATURE_GNUTLS;
1934 #endif
1935   return n;
1936 }
1937
1938 gpg_error_t
1939 pwmd_fd (pwm_t * pwm, int *fd)
1940 {
1941   if (!pwm || !fd)
1942     return FINISH (GPG_ERR_INV_ARG);
1943
1944   if (pwm->fd == -1)
1945     return FINISH (GPG_ERR_INV_STATE);
1946
1947   *fd = pwm->fd;
1948   return 0;
1949 }
1950
1951 void
1952 pwmd_set_pointer (pwm_t *pwm, void *data)
1953 {
1954   pwm->user_data = data;
1955 }
1956
1957 void *
1958 pwmd_get_pointer (pwm_t *pwm)
1959 {
1960   return pwm->user_data;
1961 }
1962
1963 int
1964 pwmd_tls_error (pwm_t *pwm)
1965 {
1966 #ifndef WITH_GNUTLS
1967   return 0;
1968 #else
1969   return pwm ? pwm->tls_error : 0;
1970 #endif
1971 }