pwmc.c

   1 /* vim:tw=78:ts=8:sw=4:set ft=c:  */
   2 /*
   3     Copyright (C) 2007 Ben Kibbey <bjk@luxsci.net>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18 */
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <err.h>
  23 #include <errno.h>
  24 #include <string.h>
  25 #include <libpwmd.h>
  26
  27 #ifdef HAVE_CONFIG_H
  28 #include <config.h>
  29 #endif
  30
  31 #include "mem.h"
  32
  33 static void usage(const char *pn)
  34 {
  35     fprintf(stderr,
  36             "Reads PWMD protocol commands from standard input.\n\n"
  37             "Usage: %s [-hv] [-E] [-s <socket>] [[-a [-P pinentry]] | [-p <password>]] [-S] [filename]\n"
  38             "   -E  exit after a command failure\n"
  39             "   -s  socket path\n"
  40             "   -p  password\n"
  41             "   -a  use pinentry(1) for password retrieval\n"
  42             "   -P  path to the pinentry binary (/usr/bin/pinentry)\n"
  43             "   -S  send the SAVE command after all others\n"
  44             "   -v  version\n"
  45             "   -h  this help text\n",
  46             pn);
  47     exit(EXIT_FAILURE);
  48 }
  49
  50 static void show_error(gpg_error_t error)
  51 {
  52     fprintf(stderr, "ERR %i %s\n", gpg_err_code(error), pwmd_strerror(error));
  53 }
  54
  55 int main(int argc, char *argv[])
  56 {
  57     int opt;
  58     int use_pinentry = 0;
  59     char *password = NULL;
  60     char *filename = NULL;
  61     char *socketpath = NULL;
  62     char command[8196], *p;
  63     int ret = EXIT_SUCCESS;
  64     gpg_error_t error;
  65     pwm_t *pwm;
  66     char *result = NULL;
  67     int save = 0;
  68     char *buf = NULL;
  69     int total = 0;
  70     int do_exit = 0;
  71     char *pinentry_path = NULL;
  72
  73     while ((opt = getopt(argc, argv, "EhvaP:p:s:S")) != EOF) {
  74         switch (opt) {
  75             case 'E':
  76                 do_exit = 1;
  77                 break;
  78             case 'S':
  79                 save = 1;
  80                 break;
  81             case 's':
  82                 socketpath = xstrdup(optarg);
  83                 break;
  84             case 'p':
  85                 password = xstrdup(optarg);
  86                 break;
  87             case 'a':
  88                 use_pinentry = 1;
  89                 break;
  90             case 'P':
  91                 pinentry_path = xstrdup(optarg);
  92                 break;
  93             case 'v':
  94                 printf("%s (pwmc)\n%s\n", PACKAGE_STRING, PACKAGE_BUGREPORT);
  95                 exit(EXIT_SUCCESS);
  96             case 'h':
  97             default:
  98                 usage(argv[0]);
  99         }
 100     }
 101
 102     if (use_pinentry && password)
 103         usage(argv[0]);
 104
 105     if (argc - optind == 1)
 106         filename = argv[optind];
 107
 108     pwmd_init();
 109
 110     if ((pwm = pwmd_connect(socketpath, &error)) == NULL) {
 111         if (password)
 112             xfree(password);
 113
 114         errx(EXIT_FAILURE, "pwmd_connect(): %s", pwmd_strerror(error));
 115     }
 116
 117     if (use_pinentry) {
 118         if (pwmd_setopt(pwm, &error, PWMD_OPTION_PINENTRY, 1) != PWMD_OK) {
 119             show_error(error);
 120             pwmd_close(pwm);
 121             exit(EXIT_FAILURE);
 122         }
 123
 124         if (pinentry_path) {
 125             if (pwmd_setopt(pwm, &error, PWMD_OPTION_PINENTRY_PATH, pinentry_path) != PWMD_OK) {
 126                 show_error(error);
 127                 pwmd_close(pwm);
 128                 exit(EXIT_FAILURE);
 129             }
 130         }
 131
 132         if (pwmd_setopt(pwm, &error, PWMD_OPTION_PINENTRY_TITLE, "Password Manager Daemon") != PWMD_OK) {
 133             show_error(error);
 134             pwmd_close(pwm);
 135             exit(EXIT_FAILURE);
 136         }
 137
 138         snprintf(command, sizeof(command), "A password is required for the "
 139                 "file \"%s\". Please\nenter the password below.", filename);
 140
 141         if (pwmd_setopt(pwm, &error, PWMD_OPTION_PINENTRY_DESC, command) != PWMD_OK) {
 142             show_error(error);
 143             pwmd_close(pwm);
 144             exit(EXIT_FAILURE);
 145         }
 146     }
 147     else if (password) {
 148         if (pwmd_setopt(pwm, &error, PWMD_OPTION_PASSWORD, password) != PWMD_OK) {
 149             xfree(password);
 150             show_error(error);
 151             pwmd_close(pwm);
 152             exit(EXIT_FAILURE);
 153         }
 154
 155         xfree(password);
 156     }
 157
 158     if (filename && pwmd_open(pwm, &error, filename) != PWMD_OK) {
 159         show_error(error);
 160         pwmd_close(pwm);
 161         exit(EXIT_FAILURE);
 162     }
 163
 164     while ((p = fgets(command, sizeof(command), stdin)) != NULL) {
 165         int len = strlen(p);
 166         char *t;
 167
 168         if (p[len - 1] != '\n' && feof(stdin) != 1) {
 169             if ((t = (char *)xrealloc(buf, (total + len + 1) * sizeof(char))) == NULL) {
 170                 if (buf)
 171                     xfree(buf);
 172
 173                 memset(&command, 0, sizeof(command));
 174                 err(EXIT_FAILURE, "xrealloc()");
 175             }
 176
 177             buf = t;
 178             memcpy(&buf[total], p, len);
 179             total += len;
 180             buf[total] = 0;
 181             continue;
 182         }
 183         else {
 184             if (buf) {
 185                 if ((t = (char *)xrealloc(buf, (total + len + 1) * sizeof(char))) == NULL) {
 186                     if (buf)
 187                         xfree(buf);
 188
 189                     memset(&command, 0, sizeof(command));
 190                     err(EXIT_FAILURE, "xrealloc()");
 191                 }
 192
 193                 buf = t;
 194                 memcpy(&buf[total], p, len);
 195                 total += len;
 196                 buf[total] = 0;
 197             }
 198         }
 199
 200         p = buf ? buf : command;
 201
 202         if (p[strlen(p) - 1] == '\n')
 203             p[strlen(p) - 1] = 0;
 204
 205         if (strcasecmp(p, "BYE") == 0)
 206             break;
 207
 208         if (pwmd_command(pwm, &result, &error, p) != PWMD_OK) {
 209             if (buf) {
 210                 xfree(buf);
 211                 buf = NULL;
 212                 total = 0;
 213             }
 214
 215             memset(&command, 0, sizeof(command));
 216             show_error(error);
 217
 218             if (do_exit) {
 219                 pwmd_close(pwm);
 220                 exit(EXIT_FAILURE);
 221             }
 222
 223             ret = EXIT_FAILURE;
 224         }
 225         else {
 226             if (buf) {
 227                 xfree(buf);
 228                 buf = NULL;
 229                 total = 0;
 230             }
 231         }
 232
 233         memset(&command, 0, sizeof(command));
 234
 235         if (result) {
 236             if (result[strlen(result) - 1] == '\n')
 237                 result[strlen(result) - 1] = 0;
 238
 239             fwrite(result, 1, strlen(result), stdout);
 240             pwmd_free_result(result);
 241             fputc('\n', stdout);
 242         }
 243     }
 244
 245     memset(&command, 0, sizeof(command));
 246
 247     if (save) {
 248 save_again:
 249         if (pwmd_save(pwm, &error) != PWMD_OK) {
 250             if (error == EPWMD_BADKEY || error == EPWMD_KEY)
 251                 goto save_again;
 252
 253             show_error(error);
 254             pwmd_close(pwm);
 255             exit(EXIT_FAILURE);
 256         }
 257     }
 258
 259     pwmd_close(pwm);
 260
 261     if (socketpath)
 262         xfree(socketpath);
 263
 264     exit(ret);
 265 }