src/libpwmd.c

   1 /*
   2     Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
   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->tcp->tls, 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->tcp->tls, 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   int active[2];
 174   int n = assuan_get_active_fds (pwm->ctx, 0, active, N_ARRAY (active));
 175
 176   if (n <= 0)
 177     return GPG_ERR_EBADFD;
 178
 179   pwm->fd = active[0];
 180 #ifdef WITH_PINENTRY
 181   pwm->pinentry_pid = -1;
 182 #endif
 183
 184   if (pwm->name)
 185     rc = pwmd_command (pwm, NULL, NULL, NULL, NULL, "OPTION NAME=%s",
 186                        pwm->name);
 187
 188   return rc;
 189 }
 190
 191 static gpg_error_t
 192 connect_uds (pwm_t * pwm, const char *path)
 193 {
 194   char *socketpath = NULL;
 195   struct passwd pw;
 196   char *pwbuf;
 197   gpg_error_t rc;
 198
 199   if (!pwm)
 200     return GPG_ERR_INV_ARG;
 201
 202   pwbuf = _getpwuid (&pw);
 203   if (!pwbuf)
 204     return gpg_error_from_syserror ();
 205
 206   if (!path || !*path)
 207     socketpath = pwmd_strdup_printf ("%s/.pwmd/socket", pw.pw_dir);
 208   else
 209     socketpath = _expand_homedir ((char *) path, &pw);
 210
 211   pwmd_free (pwbuf);
 212   if (!socketpath)
 213     return GPG_ERR_ENOMEM;
 214
 215   rc = assuan_socket_connect (pwm->ctx, socketpath, ASSUAN_INVALID_FD, 0);
 216   pwmd_free (socketpath);
 217   return rc ? rc : _connect_finalize (pwm);
 218 }
 219
 220 static gpg_error_t
 221 init_handle (pwm_t * pwm)
 222 {
 223   gpg_error_t rc;
 224   static struct assuan_malloc_hooks mhooks = {
 225     pwmd_malloc, pwmd_realloc, pwmd_free
 226   };
 227   static struct assuan_system_hooks shooks = {
 228     ASSUAN_SYSTEM_HOOKS_VERSION,
 229     __assuan_usleep,
 230     __assuan_pipe,
 231     __assuan_close,
 232     hook_read,
 233     hook_write,
 234     //FIXME
 235     NULL,                       //recvmsg
 236     NULL,                       //sendmsg both are used for FD passing
 237     __assuan_spawn,
 238     hook_waitpid,
 239     __assuan_socketpair,
 240     __assuan_socket,
 241     __assuan_connect
 242   };
 243
 244   rc = assuan_new_ext (&pwm->ctx, GPG_ERR_SOURCE_DEFAULT, &mhooks, NULL,
 245                        NULL);
 246   if (rc)
 247     return rc;
 248
 249   assuan_set_pointer (pwm->ctx, pwm);
 250   assuan_ctx_set_system_hooks (pwm->ctx, &shooks);
 251   return 0;
 252 }
 253
 254 #if defined(WITH_SSH) || defined(WITH_GNUTLS)
 255 void
 256 free_tcp (struct tcp_s *tcp)
 257 {
 258   if (!tcp)
 259     return;
 260
 261 #ifdef WITH_SSH
 262   _free_ssh_conn (tcp->ssh);
 263 #endif
 264 #ifdef WITH_GNUTLS
 265   tls_free (tcp->tls);
 266 #endif
 267
 268   pwmd_free (tcp->host);
 269   if (tcp->addrs)
 270     {
 271       freeaddrinfo (tcp->addrs);
 272       tcp->addrs = NULL;
 273     }
 274
 275   pwmd_free (tcp);
 276 }
 277 #endif
 278
 279 #if defined(WITH_SSH) || defined(WITH_GNUTLS)
 280 gpg_error_t
 281 tcp_connect_common (pwm_t * pwm)
 282 {
 283   struct addrinfo hints = { 0 };
 284   int n;
 285   char portstr[6];
 286   gpg_error_t rc = 0;
 287
 288   switch (pwm->prot)
 289     {
 290     case PWMD_IP_ANY:
 291       hints.ai_family = AF_UNSPEC;
 292       break;
 293     case PWMD_IPV4:
 294       hints.ai_family = AF_INET;
 295       break;
 296     case PWMD_IPV6:
 297       hints.ai_family = AF_INET6;
 298       break;
 299     }
 300
 301   hints.ai_socktype = SOCK_STREAM;
 302   snprintf (portstr, sizeof (portstr), "%i", pwm->tcp->port);
 303   n = getaddrinfo (pwm->tcp->host, portstr, &hints, &pwm->tcp->addrs);
 304   if (n)
 305     {
 306       fprintf (stderr, "%s\n", gai_strerror (n));
 307       return GPG_ERR_UNKNOWN_HOST;      //FIXME
 308     }
 309
 310   for (pwm->tcp->addr = pwm->tcp->addrs; pwm->tcp->addr;
 311        pwm->tcp->addr = pwm->tcp->addrs->ai_next)
 312     {
 313       pwm->fd = socket (pwm->tcp->addr->ai_family, SOCK_STREAM, 0);
 314       if (pwm->fd == -1)
 315         {
 316           rc = gpg_error_from_syserror ();
 317           if (pwm->tcp->addr == pwm->tcp->addrs->ai_next)
 318             break;
 319           continue;
 320         }
 321
 322       if (pwm->socket_timeout)
 323         fcntl (pwm->fd, F_SETFL, O_NONBLOCK);
 324
 325       if (connect (pwm->fd, pwm->tcp->addr->ai_addr,
 326                    pwm->tcp->addr->ai_family == AF_INET6
 327                    ? sizeof (struct sockaddr_in6)
 328                    : sizeof (struct sockaddr)) == -1)
 329         {
 330           int n;
 331           struct timeval tv = { pwm->socket_timeout, 0 };
 332           fd_set wfds;
 333
 334           rc = gpg_error_from_syserror ();
 335           if (gpg_err_code (rc) != GPG_ERR_EINPROGRESS)
 336             {
 337               close (pwm->fd);
 338               pwm->fd = -1;
 339               if (pwm->tcp->addr == pwm->tcp->addrs->ai_next)
 340                 return rc;
 341             }
 342
 343           FD_ZERO (&wfds);
 344           FD_SET (pwm->fd, &wfds);
 345           n = select (pwm->fd+1, NULL, &wfds, NULL, &tv);
 346           rc = 0;
 347           if (!n)
 348             rc = gpg_error (GPG_ERR_ETIMEDOUT);
 349           else if (n != -1)
 350             {
 351               socklen_t len;
 352
 353               getsockopt (pwm->fd, SOL_SOCKET, SO_ERROR, &n, &len);
 354               if (n)
 355                 rc = gpg_error_from_errno (n);
 356             }
 357           else if (n == -1)
 358             rc = gpg_error_from_syserror ();
 359
 360           if (rc)
 361             {
 362               close (pwm->fd);
 363               pwm->fd = -1;
 364               if (pwm->tcp->addr == pwm->tcp->addrs->ai_next
 365                   || gpg_err_code (rc) == GPG_ERR_ETIMEDOUT)
 366                 return rc;
 367             }
 368           else
 369             break;
 370         }
 371       else
 372         break;
 373     }
 374
 375   if (!rc && pwm->socket_timeout)
 376     fcntl (pwm->fd, F_SETFL, 0);
 377
 378   return rc;
 379 }
 380 #endif
 381
 382 gpg_error_t
 383 pwmd_connect (pwm_t * pwm, const char *url, ...)
 384 {
 385   const char *p = url;
 386   gpg_error_t rc;
 387
 388   if (!pwm)
 389     return FINISH (GPG_ERR_INV_ARG);
 390   else if (!pwm->ctx)
 391     {
 392       rc = init_handle (pwm);
 393       if (rc)
 394         return rc;
 395     }
 396
 397   rc = GPG_ERR_UNSUPPORTED_PROTOCOL;
 398
 399   if (p && *p == '/')
 400     rc = connect_uds (pwm, p);
 401   else if (!p || !strncmp (p, "file://", 7))
 402     {
 403       if (p)
 404         p += 7;
 405       rc = connect_uds (pwm, p);
 406     }
 407   else if (!strncmp (p, "ssh://", 6) || !strncmp (p, "ssh6://", 7) ||
 408            !strncmp (p, "ssh4://", 7))
 409     {
 410 #ifndef WITH_SSH
 411       return FINISH (GPG_ERR_NOT_IMPLEMENTED);
 412 #else
 413       char *host = NULL;
 414       int port;
 415       char *username = NULL;
 416
 417       if (!strncmp (p, "ssh6://", 7))
 418         {
 419           pwm->prot = PWMD_IPV6;
 420           p += 7;
 421         }
 422       else if (!strncmp (p, "ssh4://", 7))
 423         {
 424           pwm->prot = PWMD_IPV4;
 425           p += 7;
 426         }
 427       else
 428         {
 429           pwm->prot = PWMD_IP_ANY;
 430           p += 6;
 431         }
 432
 433       rc = _parse_ssh_url (p, &host, &port, &username);
 434       if (!rc)
 435         {
 436           va_list ap;
 437           char *identity = NULL;
 438           char *knownhosts = NULL;
 439
 440           va_start (ap, url);
 441           identity = va_arg (ap, char *);
 442
 443           if (!identity && !pwm->use_agent)
 444             rc = GPG_ERR_INV_ARG;
 445           else
 446             knownhosts = va_arg (ap, char *);
 447
 448           va_end (ap);
 449
 450           if (!rc)
 451             rc = _do_ssh_connect (pwm, host, port, identity, username,
 452                                   knownhosts);
 453           if (!rc)
 454             {
 455               rc = _connect_finalize (pwm);
 456               if (rc)
 457                 {
 458                   free_tcp (pwm->tcp);
 459                   pwm->tcp = NULL;
 460                 }
 461             }
 462         }
 463
 464       pwmd_free (host);
 465       pwmd_free (username);
 466       return FINISH (rc);
 467 #endif
 468     }
 469   else if (!strncmp (p, "tls://", 6) || !strncmp (p, "tls6://", 7) ||
 470            !strncmp (p, "tls4://", 7))
 471     {
 472 #ifndef WITH_GNUTLS
 473       return FINISH (GPG_ERR_NOT_IMPLEMENTED);
 474 #else
 475       char *host = NULL;
 476       int port;
 477
 478       if (!strncmp (p, "tls6://", 7))
 479         {
 480           pwm->prot = PWMD_IPV6;
 481           p += 7;
 482         }
 483       else if (!strncmp (p, "tls4://", 7))
 484         {
 485           pwm->prot = PWMD_IPV4;
 486           p += 7;
 487         }
 488       else
 489         {
 490           pwm->prot = PWMD_IP_ANY;
 491           p += 6;
 492         }
 493
 494       rc = _parse_tls_url (p, &host, &port);
 495       if (!rc)
 496         {
 497           va_list ap;
 498           char *clientcert = NULL;
 499           char *clientkey = NULL;
 500           char *cacert = NULL;
 501           char *prio = NULL;
 502           char *server_fp = NULL;
 503
 504           va_start (ap, url);
 505           clientcert = va_arg (ap, char *);
 506
 507           if (!clientcert)
 508             rc = GPG_ERR_INV_ARG;
 509           else
 510             {
 511               clientkey = va_arg (ap, char *);
 512               if (!clientkey)
 513                 rc = GPG_ERR_INV_ARG;
 514               else
 515                 {
 516                   cacert = va_arg (ap, char *);
 517                   if (!cacert)
 518                     rc = GPG_ERR_INV_ARG;
 519                   else
 520                     {
 521                       prio = va_arg (ap, char *);
 522                       server_fp = va_arg (ap, char *);
 523                     }
 524                 }
 525             }
 526
 527           va_end (ap);
 528
 529           if (!rc)
 530             rc = _do_tls_connect (pwm, host, port, clientcert, clientkey,
 531                                   cacert, prio, server_fp, pwm->tls_verify);
 532           if (!rc)
 533             {
 534               rc = _connect_finalize (pwm);
 535               if (rc)
 536                 {
 537                   free_tcp (pwm->tcp);
 538                   pwm->tcp = NULL;
 539                 }
 540             }
 541         }
 542
 543       pwmd_free (host);
 544       return FINISH (rc);
 545 #endif
 546     }
 547
 548   return FINISH (rc);
 549 }
 550
 551 static void
 552 disconnect (pwm_t * pwm)
 553 {
 554   if (!pwm)
 555     return;
 556
 557   if (pwm->ctx)
 558     assuan_release (pwm->ctx);
 559
 560 #if defined(WITH_SSH) || defined(WITH_GNUTLS)
 561   free_tcp (pwm->tcp);
 562   pwm->tcp = NULL;
 563 #endif
 564   pwm->ctx = NULL;
 565   pwm->fd = -1;
 566 }
 567
 568 void
 569 pwmd_close (pwm_t * pwm)
 570 {
 571   if (!pwm)
 572     return;
 573
 574   disconnect (pwm);
 575   pwmd_free (pwm->pinentry_error);
 576   pwmd_free (pwm->pinentry_desc);
 577   pwmd_free (pwm->pinentry_prompt);
 578   pwmd_free (pwm->pinentry_tty);
 579   pwmd_free (pwm->pinentry_display);
 580   pwmd_free (pwm->pinentry_term);
 581   pwmd_free (pwm->pinentry_lcctype);
 582   pwmd_free (pwm->pinentry_lcmessages);
 583   pwmd_free (pwm->filename);
 584   pwmd_free (pwm->name);
 585
 586 #ifdef WITH_PINENTRY
 587   if (pwm->pctx)
 588     _pinentry_disconnect (pwm);
 589 #endif
 590
 591   pwmd_free (pwm);
 592 }
 593
 594 static gpg_error_t
 595 inquire_realloc_cb (void *data, const void *buffer, size_t len)
 596 {
 597   membuf_t *mem = (membuf_t *) data;
 598   void *p;
 599
 600   if (!buffer)
 601     return 0;
 602
 603   if ((p = pwmd_realloc (mem->buf, mem->len + len)) == NULL)
 604     return gpg_error (GPG_ERR_ENOMEM);
 605
 606   mem->buf = p;
 607   memcpy ((char *) mem->buf + mem->len, buffer, len);
 608   mem->len += len;
 609   return 0;
 610 }
 611
 612 static gpg_error_t
 613 get_password (pwm_t * pwm, char **result, size_t * len,
 614               pwmd_pinentry_t w, int echo)
 615 {
 616   char buf[LINE_MAX] = { 0 }, *p;
 617   struct termios told, tnew;
 618   char *key = NULL;
 619
 620   if (result)
 621     *result = NULL;
 622
 623   if (len)
 624     *len = 0;
 625
 626   if (!isatty (STDIN_FILENO))
 627     {
 628       fprintf (stderr, N_("Input is not from a terminal! Failing.\n"));
 629       return GPG_ERR_ENOTTY;
 630     }
 631
 632   if (!echo)
 633     {
 634       if (tcgetattr (STDIN_FILENO, &told) == -1)
 635         return gpg_error_from_syserror ();
 636
 637       memcpy (&tnew, &told, sizeof (struct termios));
 638       tnew.c_lflag &= ~(ECHO);
 639       tnew.c_lflag |= ICANON | ECHONL;
 640
 641       if (tcsetattr (STDIN_FILENO, TCSANOW, &tnew) == -1)
 642         {
 643           int n = errno;
 644
 645           tcsetattr (STDIN_FILENO, TCSANOW, &told);
 646           return gpg_error_from_errno (n);
 647         }
 648     }
 649
 650   switch (w)
 651     {
 652     case PWMD_PINENTRY_OPEN:
 653       fprintf (stderr, N_("Password for %s: "), pwm->filename);
 654       break;
 655     case PWMD_PINENTRY_OPEN_FAILED:
 656       fprintf (stderr, N_("Invalid password. Password for %s: "),
 657                pwm->filename);
 658       break;
 659     case PWMD_PINENTRY_SAVE:
 660       fprintf (stderr, N_("New password for %s: "), pwm->filename);
 661       break;
 662     case PWMD_PINENTRY_SAVE_CONFIRM:
 663       fprintf (stderr, N_("Confirm password: "));
 664       break;
 665     default:
 666       break;
 667     }
 668
 669   if ((p = fgets (buf, sizeof (buf), stdin)) == NULL)
 670     {
 671       tcsetattr (STDIN_FILENO, TCSANOW, &told);
 672       return 0;
 673     }
 674
 675   if (!echo)
 676     tcsetattr (STDIN_FILENO, TCSANOW, &told);
 677
 678   if (feof (stdin))
 679     {
 680       clearerr (stdin);
 681       return GPG_ERR_CANCELED;
 682     }
 683
 684   /* Strip the newline character. */
 685   p[strlen (p) - 1] = 0;
 686
 687   if (buf[0])
 688     {
 689       key = pwmd_strdup_printf ("%s", p);
 690       memset (buf, 0, sizeof (buf));
 691       if (!key)
 692         return GPG_ERR_ENOMEM;
 693
 694       if (result)
 695         *result = key;
 696
 697       if (len)
 698         *len = strlen (key);
 699     }
 700   else
 701     {
 702       if (result)
 703         *result = pwmd_strdup ("");
 704
 705       if (len)
 706         *len = 1;
 707     }
 708
 709   return 0;
 710 }
 711
 712 gpg_error_t
 713 pwmd_password (pwm_t * pwm, const char *keyword, char **data, size_t * size)
 714 {
 715   gpg_error_t rc;
 716   int new_password = 0;
 717   char *password = NULL, *newpass = NULL;
 718   int error = 0;
 719
 720   if (data)
 721     *data = NULL;
 722
 723   if (size)
 724     *size = 0;
 725
 726   if (!strcmp (keyword, "NEW_PASSPHRASE"))
 727     new_password = 1;
 728
 729   if (!new_password && pwm->pinentry_try)
 730     error = 1;
 731
 732 again:
 733   if (pwm->disable_pinentry)
 734     {
 735       rc = get_password (pwm, &password, size,
 736                          new_password ? PWMD_PINENTRY_SAVE :
 737                          error ? PWMD_PINENTRY_OPEN_FAILED :
 738                          PWMD_PINENTRY_OPEN, 0);
 739       if (!rc && new_password)
 740         rc = get_password (pwm, &newpass, size, PWMD_PINENTRY_SAVE_CONFIRM,
 741                            0);
 742     }
 743   else
 744     {
 745       pwmd_pinentry_t which;
 746
 747       if (error)
 748         which = new_password
 749           ? PWMD_PINENTRY_SAVE_FAILED : PWMD_PINENTRY_OPEN_FAILED;
 750       else
 751         which = new_password ? PWMD_PINENTRY_SAVE : PWMD_PINENTRY_OPEN;
 752
 753       rc = pwmd_getpin (pwm, pwm->filename, &password, size, which);
 754       if (!rc && new_password)
 755         rc = pwmd_getpin (pwm, pwm->filename, &newpass, size,
 756                           PWMD_PINENTRY_SAVE_CONFIRM);
 757     }
 758
 759   if (!rc && new_password)
 760     {
 761       if ((!password && newpass) || (!newpass && password)
 762           || strcmp (newpass, password))
 763         {
 764           if (pwm->disable_pinentry)
 765             fprintf (stderr, N_("Passphrases do not match.\n"));
 766
 767           pwmd_free (password);
 768           pwmd_free (newpass);
 769           password = newpass = NULL;
 770           error = 1;
 771           goto again;
 772         }
 773     }
 774
 775   (void) pwmd_getpin (pwm, pwm->filename, NULL, NULL, PWMD_PINENTRY_CLOSE);
 776   pwmd_free (newpass);
 777   if (!rc && data)
 778     *data = password;
 779
 780   return rc;
 781 }
 782
 783 static gpg_error_t
 784 inquire_cb (void *data, const char *keyword)
 785 {
 786   pwm_t *pwm = (pwm_t *) data;
 787   gpg_error_t rc = 0;
 788   int free_result = 0;
 789   char *result = NULL;
 790   int is_password = 0;
 791   int new_password = 0;
 792
 793   if (!strcmp (keyword, "PASSPHRASE"))
 794     is_password = 1;
 795   else if (!strcmp (keyword, "NEW_PASSPHRASE"))
 796     new_password = 1;
 797
 798   /* Shouldn't get this far without a callback. */
 799   if (!pwm->override_inquire && !pwm->inquire_func
 800       && !is_password && !new_password)
 801     return gpg_error (GPG_ERR_ASS_NO_INQUIRE_CB);
 802
 803   for (;;)
 804     {
 805       size_t len = 0;
 806       gpg_error_t arc;
 807
 808       result = NULL;
 809
 810       if (!pwm->override_inquire && (is_password || new_password))
 811         {
 812           free_result = 1;
 813           rc = pwmd_password (data, keyword, &result, &len);
 814           if (!rc)
 815             rc = GPG_ERR_EOF;
 816         }
 817       else
 818         rc = pwm->inquire_func (pwm->inquire_data, keyword, rc, &result,
 819                                 &len);
 820
 821     cancel:
 822       if (rc && gpg_err_code (rc) != GPG_ERR_EOF)
 823         {
 824           gpg_error_t trc = rc;
 825
 826           /* Cancel this inquire. */
 827           rc = assuan_send_data (pwm->ctx, NULL, 1);
 828           if (!rc)
 829             {
 830               char *line;
 831               size_t len;
 832
 833               /* There is a bug (or feature?) in assuan_send_data() that
 834                * when cancelling an inquire the next read from the server is
 835                * not done until the next command making the next command
 836                * fail with GPG_ERR_ASS_UNEXPECTED_CMD.
 837                */
 838               rc = assuan_read_line (pwm->ctx, &line, &len);
 839
 840               /* Restore the original error. This differs from the error
 841                * returned from the pwmd command (GPG_ERR_CANCELED). This
 842                * error is returned to the calling function.
 843                */
 844               if (!rc)
 845                 rc = trc;
 846             }
 847
 848           break;
 849         }
 850
 851       if (gpg_err_code (rc) == GPG_ERR_EOF || !rc)
 852         {
 853           if (len <= 0 && !result)
 854             {
 855               rc = 0;
 856               break;
 857             }
 858           else if ((len <= 0 && result) || (len && !result))
 859             {
 860               rc = gpg_error (GPG_ERR_INV_ARG);
 861               break;
 862             }
 863
 864           if (pwm->inquire_maxlen
 865               && pwm->inquire_sent + len > pwm->inquire_maxlen)
 866             {
 867               rc = gpg_error (GPG_ERR_TOO_LARGE);
 868               if (!free_result)
 869                 rc = pwm->inquire_func (pwm->inquire_data, keyword, rc,
 870                                         &result, &len);
 871               goto cancel;
 872             }
 873
 874           arc = assuan_send_data (pwm->ctx, result, len);
 875           if (gpg_err_code (rc) == GPG_ERR_EOF)
 876             {
 877               rc = arc;
 878               break;
 879             }
 880
 881           rc = arc;
 882         }
 883       else if (rc)
 884         break;
 885
 886       if (!rc)
 887         {
 888           pwm->inquire_sent += len;
 889
 890           if (pwm->status_func)
 891             {
 892               char buf[ASSUAN_LINELENGTH];
 893
 894               snprintf (buf, sizeof (buf), "XFER %lu %lu", pwm->inquire_sent,
 895                         pwm->inquire_total);
 896               rc = pwm->status_func (pwm->status_data, buf);
 897               if (rc)
 898                 continue;
 899             }
 900         }
 901     }
 902
 903   if (free_result)
 904     pwmd_free (result);
 905
 906   return rc;
 907 }
 908
 909 static gpg_error_t
 910 parse_assuan_line (pwm_t * pwm)
 911 {
 912   gpg_error_t rc;
 913   char *line;
 914   size_t len;
 915
 916   rc = assuan_read_line (pwm->ctx, &line, &len);
 917   if (!rc)
 918     {
 919       if (line[0] == 'O' && line[1] == 'K' &&
 920           (line[2] == 0 || line[2] == ' '))
 921         {
 922         }
 923       else if (line[0] == '#')
 924         {
 925         }
 926       else if (line[0] == 'S' && (line[1] == 0 || line[1] == ' '))
 927         {
 928           if (pwm->status_func)
 929             {
 930               rc = pwm->status_func (pwm->status_data,
 931                                      line[1] == 0 ? line + 1 : line + 2);
 932             }
 933         }
 934       else if (line[0] == 'E' && line[1] == 'R' && line[2] == 'R' &&
 935                (line[3] == 0 || line[3] == ' '))
 936         {
 937           line += 4;
 938           rc = strtol (line, NULL, 10);
 939         }
 940     }
 941
 942   return rc;
 943 }
 944
 945 static void
 946 reset_handle_state (pwm_t * pwm, int done)
 947 {
 948 #if defined(WITH_SSH) || defined(WITH_GNUTLS)
 949   if (pwm->tcp)
 950     pwm->tcp->rc = 0;
 951
 952   if (done)
 953     {
 954       free_tcp (pwm->tcp);
 955       pwm->tcp = NULL;
 956     }
 957 #endif
 958 }
 959
 960 static void
 961 reset_handle (pwm_t * h)
 962 {
 963   h->fd = -1;
 964 #ifdef WITH_PINENTRY
 965   if (h->pctx)
 966     _pinentry_disconnect (h);
 967 #endif
 968   reset_handle_state (h, 0);
 969 }
 970
 971 gpg_error_t
 972 pwmd_disconnect (pwm_t * pwm)
 973 {
 974   if (!pwm)
 975     return FINISH (GPG_ERR_INV_ARG);
 976
 977   if (pwm->fd == -1)
 978     return FINISH (GPG_ERR_INV_STATE);
 979
 980   disconnect (pwm);
 981   reset_handle (pwm);
 982   return 0;
 983 }
 984
 985 /* Note that this should only be called when not in a command. */
 986 gpg_error_t
 987 pwmd_process (pwm_t * pwm)
 988 {
 989   gpg_error_t rc = 0;
 990   fd_set fds;
 991   struct timeval tv = { 0, 0 };
 992   int n;
 993
 994   if (!pwm)
 995     return FINISH (GPG_ERR_INV_ARG);
 996   else if (!pwm->ctx)
 997     return FINISH (GPG_ERR_INV_STATE);
 998
 999   FD_ZERO (&fds);
1000   FD_SET (pwm->fd, &fds);
1001   n = select (pwm->fd + 1, &fds, NULL, NULL, &tv);
1002
1003   if (n == -1)
1004     return FINISH (gpg_error_from_syserror ());
1005
1006   if (n > 0)
1007     {
1008       if (FD_ISSET (pwm->fd, &fds))
1009         rc = parse_assuan_line (pwm);
1010     }
1011
1012   while (!rc && assuan_pending_line (pwm->ctx))
1013     rc = parse_assuan_line (pwm);
1014
1015 #if defined (WITH_SSH) || defined (WITH_GNUTLS)
1016   if (gpg_err_code (rc) == GPG_ERR_EOF && pwm->tcp)
1017     {
1018       close (pwm->fd);
1019       pwm->fd = -1;
1020     }
1021 #endif
1022
1023   return FINISH (rc);
1024 }
1025
1026 static gpg_error_t
1027 status_cb (void *data, const char *line)
1028 {
1029   pwm_t *pwm = data;
1030
1031   if (!strncmp (line, "INQUIRE_MAXLEN ", 15))
1032     pwm->inquire_maxlen = strtol (line + 15, NULL, 10);
1033
1034   if (pwm->status_func)
1035     return pwm->status_func (pwm->status_data, line);
1036
1037   return 0;
1038 }
1039
1040 gpg_error_t
1041 _assuan_command (pwm_t * pwm, assuan_context_t ctx,
1042                  char **result, size_t * len, const char *cmd)
1043 {
1044   membuf_t data;
1045   gpg_error_t rc;
1046
1047   if (!cmd || !*cmd)
1048     return FINISH (GPG_ERR_INV_ARG);
1049
1050   if (strlen (cmd) >= ASSUAN_LINELENGTH + 1)
1051     return FINISH (GPG_ERR_LINE_TOO_LONG);
1052
1053   data.len = 0;
1054   data.buf = NULL;
1055   rc = assuan_transact (ctx, cmd, inquire_realloc_cb, &data,
1056 #ifdef WITH_QUALITY
1057                         pwm->pctx == ctx ? pwm->_inquire_func : inquire_cb,
1058                         pwm->pctx == ctx ? pwm->_inquire_data : pwm,
1059 #else
1060                         inquire_cb, pwm,
1061 #endif
1062                         status_cb, pwm);
1063
1064   if (rc)
1065     {
1066       if (data.buf)
1067         {
1068           pwmd_free (data.buf);
1069           data.buf = NULL;
1070         }
1071     }
1072   else
1073     {
1074       if (data.buf)
1075         {
1076           inquire_realloc_cb (&data, "", 1);
1077
1078           if (result)
1079             *result = (char *) data.buf;
1080           else
1081             pwmd_free (data.buf);
1082
1083           if (len)
1084             *len = data.len;
1085         }
1086     }
1087
1088   pwm->inquire_maxlen = 0;
1089   return rc;
1090 }
1091
1092 gpg_error_t
1093 pwmd_command_ap (pwm_t * pwm, char **result, size_t * rlen,
1094                  pwmd_inquire_cb_t func, void *user, const char *cmd,
1095                  va_list ap)
1096 {
1097   char *buf;
1098   size_t len;
1099   va_list ap2;
1100
1101   if (!pwm || !cmd)
1102     return FINISH (GPG_ERR_INV_ARG);
1103   if (!pwm->ctx)
1104     return FINISH (GPG_ERR_INV_STATE);
1105
1106   /*
1107    * C99 allows the dst pointer to be null which will calculate the length
1108    * of the would-be result and return it.
1109    */
1110   va_copy (ap2, ap);
1111   len = vsnprintf (NULL, 0, cmd, ap) + 1;
1112   buf = (char *) pwmd_malloc (len);
1113   if (!buf)
1114     {
1115       va_end (ap2);
1116       return FINISH (GPG_ERR_ENOMEM);
1117     }
1118
1119   len = vsnprintf (buf, len, cmd, ap2);
1120   va_end (ap2);
1121
1122   if (buf[strlen (buf) - 1] == '\n')
1123     buf[strlen (buf) - 1] = 0;
1124   if (buf[strlen (buf) - 1] == '\r')
1125     buf[strlen (buf) - 1] = 0;
1126
1127   pwm->inquire_func = func;
1128   pwm->inquire_data = user;
1129   pwm->inquire_sent = 0;
1130   gpg_error_t rc = _assuan_command (pwm, pwm->ctx, result, rlen, buf);
1131   pwmd_free (buf);
1132   return rc;
1133 }
1134
1135 gpg_error_t
1136 pwmd_command (pwm_t * pwm, char **result, size_t * len,
1137               pwmd_inquire_cb_t func, void *user, const char *cmd, ...)
1138 {
1139   va_list ap;
1140
1141   if (!pwm || !cmd)
1142     return FINISH (GPG_ERR_INV_ARG);
1143   if (!pwm->ctx)
1144     return FINISH (GPG_ERR_INV_STATE);
1145
1146   if (result)
1147     *result = NULL;
1148
1149   va_start (ap, cmd);
1150   gpg_error_t rc = pwmd_command_ap (pwm, result, len, func, user, cmd, ap);
1151   va_end (ap);
1152   return rc;
1153 }
1154
1155 static gpg_error_t
1156 send_pinentry_options (pwm_t * pwm)
1157 {
1158   gpg_error_t rc;
1159
1160   rc = pwmd_command (pwm, NULL, NULL, NULL, NULL,
1161                      "OPTION disable-pinentry=0");
1162   if (rc)
1163     return rc;
1164
1165   if (pwm->pinentry_tty)
1166     {
1167       rc =
1168         pwmd_command (pwm, NULL, NULL, NULL, NULL, "OPTION TTYNAME=%s",
1169                       pwm->pinentry_tty);
1170       if (rc)
1171         return rc;
1172     }
1173
1174   if (pwm->pinentry_term)
1175     {
1176       rc =
1177         pwmd_command (pwm, NULL, NULL, NULL, NULL, "OPTION TTYTYPE=%s",
1178                       pwm->pinentry_term);
1179       if (rc)
1180         return rc;
1181     }
1182
1183   if (pwm->pinentry_display)
1184     {
1185       rc = pwmd_command (pwm, NULL, NULL, NULL, NULL, "OPTION DISPLAY=%s",
1186                          pwm->pinentry_display);
1187       if (rc)
1188         return rc;
1189     }
1190
1191   if (pwm->pinentry_desc)
1192     {
1193       rc = pwmd_command (pwm, NULL, NULL, NULL, NULL, "OPTION DESC=%s",
1194                          pwm->pinentry_desc);
1195       if (rc)
1196         return rc;
1197     }
1198
1199   if (pwm->pinentry_lcctype)
1200     {
1201       rc = pwmd_command (pwm, NULL, NULL, NULL, NULL, "OPTION LC_CTYPE=%s",
1202                          pwm->pinentry_lcctype);
1203       if (rc)
1204         return rc;
1205     }
1206
1207   if (pwm->pinentry_lcmessages)
1208     {
1209       rc = pwmd_command (pwm, NULL, NULL, NULL, NULL, "OPTION LC_MESSAGES=%s",
1210                          pwm->pinentry_lcmessages);
1211       if (rc)
1212         return rc;
1213     }
1214
1215   return 0;
1216 }
1217
1218 gpg_error_t
1219 pwmd_socket_type (pwm_t * pwm, pwmd_socket_t * result)
1220 {
1221   if (!pwm || !result)
1222     return FINISH (GPG_ERR_INV_ARG);
1223
1224   *result = PWMD_SOCKET_LOCAL;
1225
1226   if (pwm->fd == -1)
1227     return FINISH (GPG_ERR_INV_STATE);
1228
1229 #if defined(WITH_SSH) || defined(WITH_GNUTLS)
1230 #ifdef WITH_SSH
1231   if (pwm->tcp && pwm->tcp->ssh)
1232     *result = PWMD_SOCKET_SSH;
1233 #endif
1234 #ifdef WITH_GNUTLS
1235   if (pwm->tcp && pwm->tcp->tls)
1236     *result = PWMD_SOCKET_TLS;
1237 #endif
1238 #endif
1239   return 0;
1240 }
1241
1242 gpg_error_t
1243 pwmd_open (pwm_t * pwm, const char *filename, pwmd_inquire_cb_t cb,
1244            void *data)
1245 {
1246   gpg_error_t rc = 0;
1247   int no_pinentry;
1248
1249   if (!pwm || !filename || !*filename)
1250     return FINISH (GPG_ERR_INV_ARG);
1251
1252   if (!pwm->ctx)
1253     return FINISH (GPG_ERR_INV_STATE);
1254
1255 #if defined(WITH_SSH) || defined(WITH_GNUTLS)
1256   no_pinentry = pwm->disable_pinentry || pwm->tcp || pwm->local_pinentry;
1257 #else
1258   no_pinentry = pwm->disable_pinentry || pwm->local_pinentry;
1259 #endif
1260
1261   if (!no_pinentry)
1262     rc = send_pinentry_options (pwm);
1263   else
1264     rc = pwmd_command (pwm, NULL, NULL, NULL, NULL,
1265                        "OPTION disable-pinentry");
1266
1267   if (!rc)
1268     {
1269       pwm->pinentry_try = 0;
1270       pwmd_free (pwm->filename);
1271       pwm->filename = pwmd_strdup (filename);
1272
1273       do
1274         {
1275           rc = pwmd_command (pwm, NULL, NULL, cb, data, "OPEN %s%s",
1276                              (pwm->opts & OPT_LOCK_ON_OPEN) ? "--lock " : "",
1277                              filename);
1278         }
1279       while (gpg_err_code (rc) == GPG_ERR_BAD_PASSPHRASE
1280              && no_pinentry && ++pwm->pinentry_try < pwm->pinentry_tries);
1281
1282       pwm->pinentry_try = 0;
1283
1284       if (rc)
1285         {
1286           pwmd_free (pwm->filename);
1287           pwm->filename = NULL;
1288         }
1289     }
1290
1291   return FINISH (rc);
1292 }
1293
1294 gpg_error_t
1295 pwmd_save (pwm_t * pwm, const char *args, pwmd_inquire_cb_t cb, void *data)
1296 {
1297   gpg_error_t rc;
1298
1299   if (!pwm)
1300     return FINISH (GPG_ERR_INV_ARG);
1301   if (!pwm->ctx)
1302     return FINISH (GPG_ERR_INV_STATE);
1303
1304   rc = pwmd_command (pwm, NULL, NULL, cb, data, "SAVE %s", args ? args : "");
1305   return FINISH (rc);
1306 }
1307
1308 gpg_error_t
1309 pwmd_setopt (pwm_t * pwm, pwmd_option_t opt, ...)
1310 {
1311   va_list ap;
1312   int n;
1313   char *arg1;
1314   gpg_error_t rc = 0;
1315
1316   if (!pwm)
1317     return FINISH (GPG_ERR_INV_ARG);
1318
1319   va_start (ap, opt);
1320
1321   switch (opt)
1322     {
1323     case PWMD_OPTION_LOCK_ON_OPEN:
1324       n = va_arg (ap, int);
1325
1326       if (n < 0 || n > 1)
1327         rc = GPG_ERR_INV_VALUE;
1328
1329       if (n)
1330         pwm->opts |= OPT_LOCK_ON_OPEN;
1331       else
1332         pwm->opts &= ~OPT_LOCK_ON_OPEN;
1333
1334       break;
1335     case PWMD_OPTION_INQUIRE_TOTAL:
1336       pwm->inquire_total = va_arg (ap, size_t);
1337       break;
1338     case PWMD_OPTION_STATUS_CB:
1339       pwm->status_func = va_arg (ap, pwmd_status_cb_t);
1340       break;
1341     case PWMD_OPTION_STATUS_DATA:
1342       pwm->status_data = va_arg (ap, void *);
1343       break;
1344     case PWMD_OPTION_NO_PINENTRY:
1345       n = va_arg (ap, int);
1346
1347       if (n < 0 || n > 1)
1348         rc = GPG_ERR_INV_VALUE;
1349       else
1350         pwm->disable_pinentry = n;
1351
1352       break;
1353     case PWMD_OPTION_LOCAL_PINENTRY:
1354       n = va_arg (ap, int);
1355
1356       if (n < 0 || n > 1)
1357         rc = GPG_ERR_INV_VALUE;
1358       else
1359         pwm->local_pinentry = n;
1360
1361       break;
1362     case PWMD_OPTION_PINENTRY_TIMEOUT:
1363       n = va_arg (ap, int);
1364
1365       if (n < 0)
1366         rc = GPG_ERR_INV_VALUE;
1367       else
1368         pwm->pinentry_timeout = n;
1369
1370       break;
1371     case PWMD_OPTION_PINENTRY_TRIES:
1372       n = va_arg (ap, int);
1373       pwm->pinentry_tries = n;
1374       break;
1375     case PWMD_OPTION_PINENTRY_PATH:
1376       arg1 = va_arg (ap, char *);
1377       pwmd_free (pwm->pinentry_path);
1378       pwm->pinentry_path = arg1 ? _expand_homedir (arg1, NULL) : NULL;
1379       break;
1380     case PWMD_OPTION_PINENTRY_TTY:
1381       arg1 = va_arg (ap, char *);
1382       pwmd_free (pwm->pinentry_tty);
1383       pwm->pinentry_tty = arg1 ? pwmd_strdup (arg1) : NULL;
1384       break;
1385     case PWMD_OPTION_PINENTRY_DISPLAY:
1386       arg1 = va_arg (ap, char *);
1387       pwmd_free (pwm->pinentry_display);
1388       pwm->pinentry_display = arg1 ? pwmd_strdup (arg1) : NULL;
1389       break;
1390     case PWMD_OPTION_PINENTRY_TERM:
1391       arg1 = va_arg (ap, char *);
1392       pwmd_free (pwm->pinentry_term);
1393       pwm->pinentry_term = arg1 ? pwmd_strdup (arg1) : NULL;
1394       break;
1395     case PWMD_OPTION_PINENTRY_ERROR:
1396       arg1 = va_arg (ap, char *);
1397       pwmd_free (pwm->pinentry_error);
1398       pwm->pinentry_error = arg1 ? _percent_escape (arg1) : NULL;
1399       break;
1400     case PWMD_OPTION_PINENTRY_PROMPT:
1401       arg1 = va_arg (ap, char *);
1402       pwmd_free (pwm->pinentry_prompt);
1403       pwm->pinentry_prompt = arg1 ? _percent_escape (arg1) : NULL;
1404       break;
1405     case PWMD_OPTION_PINENTRY_DESC:
1406       arg1 = va_arg (ap, char *);
1407       pwmd_free (pwm->pinentry_desc);
1408       pwm->pinentry_desc = arg1 ? _percent_escape (arg1) : NULL;
1409       break;
1410     case PWMD_OPTION_PINENTRY_LC_CTYPE:
1411       arg1 = va_arg (ap, char *);
1412       pwmd_free (pwm->pinentry_lcctype);
1413       pwm->pinentry_lcctype = arg1 ? pwmd_strdup (arg1) : NULL;
1414       break;
1415     case PWMD_OPTION_PINENTRY_LC_MESSAGES:
1416       arg1 = va_arg (ap, char *);
1417       pwmd_free (pwm->pinentry_lcmessages);
1418       pwm->pinentry_lcmessages = arg1 ? pwmd_strdup (arg1) : NULL;
1419       break;
1420     case PWMD_OPTION_KNOWNHOST_CB:
1421       pwm->kh_cb = va_arg (ap, pwmd_knownhost_cb_t);
1422       break;
1423     case PWMD_OPTION_KNOWNHOST_DATA:
1424       pwm->kh_data = va_arg (ap, void *);
1425       break;
1426     case PWMD_OPTION_SSH_AGENT:
1427       pwm->use_agent = va_arg (ap, int);
1428
1429       if (pwm->use_agent < 0 || pwm->use_agent > 1)
1430         {
1431           pwm->use_agent = 0;
1432           rc = GPG_ERR_INV_VALUE;
1433         }
1434       break;
1435     case PWMD_OPTION_TLS_VERIFY:
1436       pwm->tls_verify = va_arg (ap, int);
1437
1438       if (pwm->tls_verify < 0 || pwm->tls_verify > 1)
1439         {
1440           pwm->tls_verify = 0;
1441           rc = GPG_ERR_INV_VALUE;
1442         }
1443       break;
1444     case PWMD_OPTION_SOCKET_TIMEOUT:
1445       pwm->socket_timeout = va_arg (ap, int);
1446       if (pwm->socket_timeout < 0)
1447         {
1448           pwm->socket_timeout = 0;
1449           rc = GPG_ERR_INV_VALUE;
1450         }
1451
1452 #ifdef WITH_SSH
1453       if (pwm->tcp && pwm->tcp->ssh && pwm->tcp->ssh->session)
1454         {
1455           pwm->tcp->ssh->timeout = pwm->socket_timeout;
1456           libssh2_session_set_timeout (pwm->tcp->ssh->session,
1457                                        pwm->socket_timeout * 1000);
1458         }
1459 #endif
1460 #ifdef WITH_GNUTLS
1461       if (pwm->tcp && pwm->tcp->tls && pwm->tcp->tls->session)
1462         pwm->tcp->tls->timeout = pwm->socket_timeout;
1463 #endif
1464       break;
1465     case PWMD_OPTION_OVERRIDE_INQUIRE:
1466       pwm->override_inquire = va_arg (ap, int);
1467
1468       if (pwm->override_inquire < 0 || pwm->override_inquire > 1)
1469         {
1470           pwm->override_inquire = 0;
1471           rc = GPG_ERR_INV_VALUE;
1472         }
1473       break;
1474     default:
1475       rc = GPG_ERR_UNKNOWN_OPTION;
1476       break;
1477     }
1478
1479   va_end (ap);
1480   return FINISH (rc);
1481 }
1482
1483 gpg_error_t
1484 pwmd_new (const char *name, pwm_t ** pwm)
1485 {
1486   pwm_t *h = pwmd_calloc (1, sizeof (pwm_t));
1487   gpg_error_t rc;
1488
1489   if (!h)
1490     return FINISH (GPG_ERR_ENOMEM);
1491
1492   if (name)
1493     {
1494       h->name = pwmd_strdup (name);
1495       if (!h->name)
1496         {
1497           pwmd_free (h);
1498           return FINISH (GPG_ERR_ENOMEM);
1499         }
1500     }
1501
1502   reset_handle (h);
1503   h->pinentry_timeout = -30;
1504   h->pinentry_tries = 3;
1505 #if defined(WITH_SSH) || defined(WITH_GNUTLS)
1506   h->prot = PWMD_IP_ANY;
1507 #endif
1508
1509   if (ttyname (STDOUT_FILENO))
1510     {
1511       char buf[256];
1512
1513       ttyname_r (STDOUT_FILENO, buf, sizeof (buf));
1514       h->pinentry_tty = pwmd_strdup (buf);
1515       if (!h->pinentry_tty)
1516         {
1517           rc = GPG_ERR_ENOMEM;
1518           goto fail;
1519         }
1520     }
1521
1522   if (getenv ("TERM") && h->pinentry_tty)
1523     {
1524       h->pinentry_term = pwmd_strdup (getenv ("TERM"));
1525       if (!h->pinentry_term)
1526         {
1527           rc = GPG_ERR_ENOMEM;
1528           goto fail;
1529         }
1530     }
1531
1532   if (getenv ("DISPLAY"))
1533     {
1534       h->pinentry_display = pwmd_strdup (getenv ("DISPLAY"));
1535       if (!h->pinentry_display)
1536         {
1537           rc = GPG_ERR_ENOMEM;
1538           goto fail;
1539         }
1540     }
1541
1542   update_pinentry_settings (h);
1543   *pwm = h;
1544   return 0;
1545
1546 fail:
1547   pwmd_close (h);
1548   return FINISH (rc);
1549 }
1550
1551 void
1552 pwmd_free (void *ptr)
1553 {
1554   _xfree (ptr);
1555 }
1556
1557 void *
1558 pwmd_malloc (size_t size)
1559 {
1560   return _xmalloc (size);
1561 }
1562
1563 void *
1564 pwmd_calloc (size_t nmemb, size_t size)
1565 {
1566   return _xcalloc (nmemb, size);
1567 }
1568
1569 void *
1570 pwmd_realloc (void *ptr, size_t size)
1571 {
1572   return _xrealloc (ptr, size);
1573 }
1574
1575 char *
1576 pwmd_strdup (const char *str)
1577 {
1578   char *t;
1579   size_t len;
1580   register size_t c;
1581
1582   len = strlen (str);
1583   t = _xmalloc ((len + 1) * sizeof (char));
1584   if (!t)
1585     return NULL;
1586
1587   for (c = 0; c < len; c++)
1588     t[c] = str[c];
1589
1590   t[c] = 0;
1591   return t;
1592 }
1593
1594 char *
1595 pwmd_strdup_printf (const char *fmt, ...)
1596 {
1597   va_list ap, ap2;
1598   int len;
1599   char *buf;
1600
1601   if (!fmt)
1602     return NULL;
1603
1604   va_start (ap, fmt);
1605   va_copy (ap2, ap);
1606   len = vsnprintf (NULL, 0, fmt, ap);
1607   va_end (ap);
1608   buf = pwmd_malloc (++len);
1609   if (buf)
1610     vsnprintf (buf, len, fmt, ap2);
1611
1612   va_end (ap2);
1613   return buf;
1614 }
1615
1616 gpg_error_t
1617 pwmd_getpin (pwm_t * pwm, const char *filename, char **result,
1618              size_t * len, pwmd_pinentry_t which)
1619 {
1620 #ifndef WITH_PINENTRY
1621   return FINISH (GPG_ERR_NOT_IMPLEMENTED);
1622 #else
1623   gpg_error_t rc = _pwmd_getpin (pwm, filename, result, len, which);
1624
1625   return FINISH (rc);
1626 #endif
1627 }
1628
1629 const char *
1630 pwmd_version ()
1631 {
1632   return LIBPWMD_VERSION_STR;
1633 }
1634
1635 unsigned int
1636 pwmd_features ()
1637 {
1638   unsigned int n = 0;
1639
1640 #ifdef WITH_PINENTRY
1641   n |= PWMD_FEATURE_PINENTRY;
1642 #endif
1643 #ifdef WITH_SSH
1644   n |= PWMD_FEATURE_SSH;
1645 #endif
1646 #ifdef WITH_QUALITY
1647   n |= PWMD_FEATURE_CRACK;
1648 #endif
1649 #ifdef WITH_GNUTLS
1650   n |= PWMD_FEATURE_GNUTLS;
1651 #endif
1652   return n;
1653 }
1654
1655 gpg_error_t
1656 pwmd_fd (pwm_t * pwm, int *fd)
1657 {
1658   if (!pwm || !fd)
1659     return FINISH (GPG_ERR_INV_ARG);
1660
1661   if (pwm->fd == -1)
1662     return FINISH (GPG_ERR_INV_STATE);
1663
1664   *fd = pwm->fd;
1665   return 0;
1666 }