pwmc.c

   1 #define DEBUG 1
   2 /* vim:tw=78:ts=8:sw=4:set ft=c:  */
   3 /*
   4     Copyright (C) 2007-2008 Ben Kibbey <bjk@luxsci.net>
   5
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     This program is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02110-1301  USA
  19 */
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <unistd.h>
  23 #include <err.h>
  24 #include <errno.h>
  25 #include <string.h>
  26 #include <libpwmd.h>
  27 #include <assuan.h>
  28 #ifdef DEBUG
  29 #include <sys/select.h>
  30 #include <fcntl.h>
  31 #endif
  32
  33 #ifdef HAVE_CONFIG_H
  34 #include <config.h>
  35 #endif
  36
  37 #ifdef HAVE_LOCALE_H
  38 #include <locale.h>
  39 #endif
  40
  41 #include "gettext.h"
  42 #define N_(msgid)       gettext(msgid)
  43
  44 #ifndef MEM_DEBUG
  45 #include "mem.h"
  46 #else
  47 #define xfree           free
  48 #define xrealloc        realloc
  49 #define xmalloc         malloc
  50 #define xstrdup         strdup
  51 #define xcalloc         calloc
  52 #endif
  53
  54 #define DEFAULT_PORT    6466
  55 pwm_t *pwm;
  56
  57 static void show_error(gpg_error_t error)
  58 {
  59     fprintf(stderr, "ERR %i %s\n", gpg_err_code(error), pwmd_strerror(error));
  60 }
  61
  62 static void usage(const char *pn)
  63 {
  64     fprintf(stderr, N_(
  65             "Reads PWMD protocol commands from standard input.\n\n"
  66             "Usage: pwmc [-hvX] [-s <socket>] "
  67 #ifdef DEBUG
  68             "[-E <n>] [-y <n>]"
  69 #endif
  70             "[-PTND <string>] [-p <password>]\n"
  71             "            [-S [-i <iter>]] [-c <name>] [-t <n>] [-d <fd>] [-I <fd>]\n"
  72 #ifdef HAVE_LIBGNUTLS
  73             "            [-H <hostname> [-R <port>]] [filename]\n"
  74 #else
  75             "            [filename]\n"
  76 #endif
  77 #ifdef DEBUG
  78             "   -E  pinentry method (0=pwmd, 1=pwmd async, 2=libpwmd nb)\n"
  79             "   -y  number of pinentry tries before failing (3)\n"
  80 #endif
  81 #ifdef HAVE_LIBGNUTLS
  82             "   -H  connect to hostname\n"
  83             "   -R  alterate port (%i)\n"
  84 #endif
  85             "   -t  pinentry timeout\n"
  86             "   -X  disable showing of status messages from the server\n"
  87             "   -c  set the client name\n"
  88             "   -s  socket path (~/.pwmd/socket)\n"
  89             "   -p  password\n"
  90             "   -P  path to the pinentry binary (server default)\n"
  91             "   -T  pinentry tty\n"
  92             "   -N  pinentry terminal type\n"
  93             "   -D  pinentry display\n"
  94             "   -d  redirect command output to the specified file descriptor\n"
  95             "   -I  read inquire data from the specified file descriptor\n"
  96             "   -S  send the SAVE command before exiting\n"
  97             "   -i  encrypt with the specified number of iterations (-1 = 0 iterations)\n"
  98             "   -v  version\n"
  99             "   -h  this help text\n"), DEFAULT_PORT);
 100     exit(EXIT_FAILURE);
 101 }
 102
 103 struct inquire_s {
 104     FILE *fp;
 105     char *data;
 106 };
 107
 108 static gpg_error_t do_inquire(void *data, const char *keyword, gpg_error_t rc,
 109         char **result, size_t *result_len)
 110 {
 111     int c;
 112     static char buf[ASSUAN_LINELENGTH];
 113     char *p;
 114     size_t len = 0;
 115     struct inquire_s *inq = (struct inquire_s *)data;
 116
 117     if (rc) {
 118         memset(buf, 0, sizeof(buf));
 119         return rc;
 120     }
 121
 122     buf[0] = 0;
 123     p = buf;
 124
 125     if (inq->data) {
 126         snprintf(buf, sizeof(buf), "%s", inq->data);
 127         xfree(inq->data);
 128         inq->data = NULL;
 129         len = strlen(buf);
 130         p = buf + len;
 131     }
 132
 133     while ((c = fgetc(inq->fp)) != EOF) {
 134         if (len == sizeof(buf)) {
 135             ungetc(c, inq->fp);
 136             break;
 137         }
 138
 139         *p++ = c;
 140         len++;
 141     }
 142
 143     if (!buf[0]) {
 144         memset(buf, 0, sizeof(buf));
 145         return GPG_ERR_EOF;
 146     }
 147
 148     *result = buf;
 149     *result_len = len;
 150     return 0;
 151 }
 152
 153 static int status_msg_cb(void *data, const char *line)
 154 {
 155     fprintf(stderr, "%s\n", line);
 156     return 0;
 157 }
 158
 159 #ifdef DEBUG
 160 static gpg_error_t do_nb_command(int fd, int which)
 161 {
 162     int n;
 163     gpg_error_t error = 0;
 164
 165     fcntl(fd, F_SETFL, O_NONBLOCK);
 166
 167     do {
 168         fd_set fds;
 169         struct timeval tv = {0, 50000};
 170
 171         FD_ZERO(&fds);
 172         FD_SET(fd, &fds);
 173         n = select(fd+1, &fds, NULL, NULL, &tv);
 174
 175         if (n > 0) {
 176             if (FD_ISSET(fd, &fds)) {
 177                 pwmd_nb_status_t status;
 178
 179                 n = read(fd, &status, sizeof(status));
 180
 181                 if (n == -1) {
 182                     error = gpg_error_from_errno(errno);
 183                     goto done;
 184                 }
 185
 186                 if (!which)
 187                     error = pwmd_open_nb_finalize(pwm, &status);
 188                 else
 189                     error = pwmd_save_nb_finalize(pwm, &status);
 190
 191                 if (error)
 192                     goto done;
 193             }
 194         }
 195         else
 196             fputc('.', stderr);
 197     } while (n == 0);
 198
 199 done:
 200     return error;
 201 }
 202 #endif
 203
 204 int main(int argc, char *argv[])
 205 {
 206     int opt;
 207     char *password = NULL;
 208     char *filename = NULL;
 209     char *socketpath = NULL;
 210     char command[ASSUAN_LINELENGTH], *p;
 211     int ret = EXIT_SUCCESS;
 212     gpg_error_t error;
 213     char *result = NULL;
 214     int save = 0;
 215     char *pinentry_path = NULL;
 216     char *display = NULL, *tty = NULL, *ttytype = NULL;
 217     int outfd = STDOUT_FILENO;
 218     FILE *outfp = stdout;
 219     int inquirefd = STDIN_FILENO;
 220     FILE *inquirefp = stdin;
 221     int show_status = 1;
 222     char *clientname = NULL;
 223     char *inquire = NULL;
 224     int iter = -2;
 225     int timeout = 0;
 226 #ifdef HAVE_LIBGNUTLS
 227     char *host = NULL;
 228     int port = DEFAULT_PORT;
 229 #endif
 230 #ifdef DEBUG
 231     int tries = 0;
 232     int method = 0;
 233     pwmd_async_t s;
 234 #endif
 235
 236     setlocale(LC_ALL, "");
 237     bindtextdomain("libpwmd", LOCALEDIR);
 238
 239 #ifdef DEBUG
 240 #ifdef HAVE_LIBGNUTLS
 241     while ((opt = getopt(argc, argv, "H:R:y:t:E:c:I:XT:N:D:hvP:p:s:Si:d:")) != EOF) {
 242 #else
 243     while ((opt = getopt(argc, argv, "y:t:E:c:I:XT:N:D:hvP:p:s:Si:d:")) != EOF) {
 244 #endif
 245 #else
 246 #ifdef HAVE_LIBGNUTLS
 247     while ((opt = getopt(argc, argv, "H:R:t:c:I:XT:N:D:hvP:p:s:Si:d:")) != EOF) {
 248 #else
 249     while ((opt = getopt(argc, argv, "t:c:I:XT:N:D:hvP:p:s:Si:d:")) != EOF) {
 250 #endif
 251 #endif
 252         switch (opt) {
 253 #ifdef DEBUG
 254             case 'E':
 255                 method = atoi(optarg);
 256
 257                 if (method > 2)
 258                     method = 2;
 259                 break;
 260             case 'y':
 261                 tries = atoi(optarg);
 262                 break;
 263 #endif
 264 #ifdef HAVE_LIBGNUTLS
 265             case 'H':
 266                 host = xstrdup(optarg);
 267                 break;
 268             case 'R':
 269                 port = atoi(optarg);
 270                 break;
 271 #endif
 272             case 't':
 273                 timeout = atoi(optarg);
 274                 break;
 275             case 'c':
 276                 clientname = xstrdup(optarg);
 277                 break;
 278             case 'X':
 279                 show_status = 0;
 280                 break;
 281             case 'T':
 282                 tty = optarg;
 283                 break;
 284             case 'N':
 285                 ttytype = optarg;
 286                 break;
 287             case 'D':
 288                 display = optarg;
 289                 break;
 290             case 'I':
 291                 inquirefd = atoi(optarg);
 292                 inquirefp = fdopen(inquirefd, "r");
 293
 294                 if (!inquirefp) {
 295                     xfree(password);
 296                     err(EXIT_FAILURE, "%i", inquirefd);
 297                 }
 298                 break;
 299             case 'd':
 300                 outfd = atoi(optarg);
 301                 outfp = fdopen(outfd, "w");
 302
 303                 if (!outfp) {
 304                     xfree(password);
 305                     err(EXIT_FAILURE, "%i", outfd);
 306                 }
 307                 break;
 308             case 'S':
 309                 save = 1;
 310                 break;
 311             case 'i':
 312                 iter = atoi(optarg);
 313
 314                 if (iter < -1) {
 315                     xfree(password);
 316                     usage(argv[0]);
 317                 }
 318                 break;
 319             case 's':
 320                 socketpath = xstrdup(optarg);
 321                 break;
 322             case 'p':
 323                 password = xstrdup(optarg);
 324                 memset(optarg, 0, strlen(optarg));
 325                 break;
 326             case 'P':
 327                 pinentry_path = xstrdup(optarg);
 328                 break;
 329             case 'v':
 330                 xfree(password);
 331                 printf("%s (pwmc)\n%s\n", PACKAGE_STRING, PACKAGE_BUGREPORT);
 332                 exit(EXIT_SUCCESS);
 333             case 'h':
 334             default:
 335                 xfree(password);
 336                 usage(argv[0]);
 337         }
 338     }
 339
 340     filename = argv[optind];
 341     pwmd_init();
 342
 343 #ifdef HAVE_LIBGNUTLS
 344     if (host) {
 345 #ifdef DEBUG
 346         if (method == 1) {
 347             if ((pwm = pwmd_tcp_connect_async(host, port, &error, NULL, NULL,
 348                             NULL)) == NULL) {
 349                 xfree(password);
 350                 errx(EXIT_FAILURE, "pwmd_tcp_connect_async(): %s", pwmd_strerror(error));
 351             }
 352
 353             do {
 354                 s = pwmd_process(pwm, &error);
 355                 fputc('.', stderr);
 356                 usleep(50000);
 357             } while (s == ASYNC_PROCESS);
 358
 359             if (error) {
 360                 pwmd_close(pwm);
 361                 xfree(password);
 362                 errx(EXIT_FAILURE, "pwmd_tcp_connect_async(): %s", pwmd_strerror(error));
 363             }
 364
 365             pwmd_finalize(pwm);
 366         }
 367         else {
 368 #endif
 369             if ((pwm = pwmd_tcp_connect(host, port, &error, NULL, NULL, NULL))
 370                     == NULL) {
 371                 xfree(password);
 372                 errx(EXIT_FAILURE, "pwmd_tcp_connect(): %s", pwmd_strerror(error));
 373             }
 374 #ifdef DEBUG
 375         }
 376 #endif
 377     }
 378     else {
 379 #endif
 380         if ((pwm = pwmd_connect(socketpath, &error)) == NULL) {
 381             xfree(password);
 382             errx(EXIT_FAILURE, "pwmd_connect(): %s", pwmd_strerror(error));
 383         }
 384 #ifdef HAVE_LIBGNUTLS
 385     }
 386 #endif
 387
 388     error = pwmd_command(pwm, &result, "OPTION CLIENT NAME=%s", clientname ? clientname : "pwmc");
 389     xfree(clientname);
 390
 391     if (error) {
 392         xfree(password);
 393         errx(EXIT_FAILURE, "pwmd_command(): %s", pwmd_strerror(error));
 394     }
 395
 396     if (timeout > 0) {
 397         error = pwmd_command(pwm, &result, "OPTION TIMEOUT=%i", timeout);
 398
 399         if (error) {
 400             xfree(password);
 401             errx(EXIT_FAILURE, "pwmd_command(): %s", pwmd_strerror(error));
 402         }
 403     }
 404
 405     if (password) {
 406         error = pwmd_setopt(pwm, PWMD_OPTION_PASSWORD, password);
 407
 408         if (error) {
 409             xfree(password);
 410             goto done;
 411         }
 412
 413         xfree(password);
 414     }
 415     else {
 416         if (pinentry_path) {
 417             error = pwmd_command(pwm, &result, "OPTION PATH=%s", pinentry_path);
 418
 419             if (error)
 420                 goto done;
 421         }
 422
 423         if (display) {
 424             error = pwmd_command(pwm, &result, "OPTION DISPLAY=%s", display);
 425
 426             if (error)
 427                 goto done;
 428         }
 429
 430         if (tty) {
 431             error = pwmd_command(pwm, &result, "OPTION TTYNAME=%s", tty);
 432
 433             if (error)
 434                 goto done;
 435         }
 436
 437         if (ttytype) {
 438             error = pwmd_command(pwm, &result, "OPTION TTYTYPE=%s", ttytype);
 439
 440             if (error)
 441                 goto done;
 442         }
 443 #ifdef DEBUG
 444         if (method >= 2) {
 445             error = pwmd_setopt(pwm, PWMD_OPTION_PINENTRY, 1);
 446
 447             if (error)
 448                 goto done;
 449         }
 450
 451         if (tries > 0) {
 452             error = pwmd_setopt(pwm, PWMD_OPTION_PINENTRY_TRIES, tries);
 453
 454             if (error)
 455                 goto done;
 456         }
 457 #endif
 458     }
 459
 460     if (show_status) {
 461         error = pwmd_setopt(pwm, PWMD_OPTION_STATUS_FUNC, status_msg_cb);
 462
 463         if (error)
 464             goto done;
 465     }
 466
 467     if (filename) {
 468 #ifdef DEBUG
 469         /* This method doesn't support PWMD_OPTION_PINENTRY_TRIES. */
 470         if (method == 1) {
 471             error = pwmd_open_async(pwm, filename);
 472
 473             if (!error) {
 474                 do {
 475                     s = pwmd_process(pwm, &error);
 476                     fputc('.', stderr);
 477                     usleep(50000);
 478                 } while (s == ASYNC_PROCESS);
 479
 480                 pwmd_finalize(pwm);
 481             }
 482         }
 483         else if (method == 2) {
 484             int fd = pwmd_open_nb(pwm, &error, filename, timeout);
 485
 486             if (fd == -1)
 487                 goto done;
 488             else if (fd >= 0)
 489                 error = do_nb_command(fd, 0);
 490         }
 491         else
 492             error = pwmd_open(pwm, filename);
 493 #else
 494         error = pwmd_open(pwm, filename);
 495 #endif
 496
 497         if (error)
 498             goto done;
 499     }
 500
 501     if (filename) {
 502         error = pwmd_command(pwm, &result, "LOCK");
 503
 504         if (error)
 505             goto done;
 506     }
 507
 508     p = fgets(command, sizeof(command), stdin);
 509
 510     if (!p)
 511         goto done;
 512
 513     /*
 514      * This is a known INQUIRE command. We use pwmd_inquire() to send the
 515      * data from the do_inquire() callback function.
 516      */
 517     if (strncasecmp(p, "STORE ", 6) == 0) {
 518         p += 6;
 519         inquire = (char *)"STORE";
 520     }
 521     else if (strncasecmp(p, "IMPORT ", 7) == 0) {
 522         p += 7;
 523         inquire = (char *)"IMPORT";
 524     }
 525
 526     if (inquire) {
 527         struct inquire_s *inq = (struct inquire_s *)malloc(sizeof(struct inquire_s));
 528
 529         if (!inq) {
 530             error = gpg_error_from_errno(ENOMEM);
 531             goto done;
 532         }
 533
 534         inq->data = xstrdup(p);
 535         inq->fp = inquirefp;
 536         error = pwmd_inquire(pwm, inquire, do_inquire, inq);
 537         free(inq);
 538         goto done;
 539     }
 540
 541     if (strcasecmp(p, "BYE") == 0)
 542         goto done;
 543
 544     error = pwmd_command(pwm, &result, command);
 545     memset(command, 0, sizeof(command));
 546
 547     if (error)
 548         goto done;
 549
 550     if (result) {
 551         fwrite(result, 1, strlen(result), outfp);
 552         pwmd_free_result(result);
 553     }
 554
 555 done:
 556     memset(command, 0, sizeof(command));
 557
 558     if (!error && save) {
 559         if (iter != -2) {
 560             error = pwmd_command(pwm, &result, "OPTION ITERATIONS=%i", iter);
 561
 562             if (error)
 563                 goto done;
 564         }
 565
 566 #ifdef DEBUG
 567         if (method == 1) {
 568             error = pwmd_save_async(pwm);
 569
 570             if (!error) {
 571                 do {
 572                     s = pwmd_process(pwm, &error);
 573                     fputc('.', stderr);
 574                     usleep(50000);
 575                 } while (s == ASYNC_PROCESS);
 576
 577                 pwmd_finalize(pwm);
 578             }
 579         }
 580         else if (method == 3) {
 581             int fd = pwmd_save_nb(pwm, &error);
 582
 583             if (fd == -1)
 584                 goto done;
 585             else if (fd >= 0)
 586                 error = do_nb_command(fd, 1);
 587         }
 588         else
 589             error = pwmd_save(pwm);
 590 #else
 591         error = pwmd_save(pwm);
 592 #endif
 593     }
 594
 595     if (!error && filename)
 596         error = pwmd_command(pwm, &result, "UNLOCK");
 597
 598     if (error) {
 599         show_error(error);
 600         ret = EXIT_FAILURE;
 601     }
 602
 603     pwmd_close(pwm);
 604
 605     if (socketpath)
 606         xfree(socketpath);
 607
 608     exit(ret);
 609 }