src/mail/vmailpasswd.c

   1 /*
   2 Domtool (http://hcoop.sf.net/)
   3 Copyright (C) 2005-2007  Adam Chlipala
   4
   5 This program is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU General Public License
   7 as published by the Free Software Foundation; either version 2
   8 of the License, or (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
  20 // Setting a virtual mailbox's password if you know its current password
  21
  22 #define _XOPEN_SOURCE
  23 #include <unistd.h>
  24 #include <stdlib.h>
  25 #include <stdio.h>
  26 #include <ctype.h>
  27 #include <string.h>
  28
  29 int validDomain(const char *dom) {
  30   for (; *dom; ++dom)
  31     if (*dom != '.' && *dom != '_' && *dom != '-' && !isalnum(*dom))
  32       return 0;
  33   return 1;
  34 }
  35
  36 int main(int argc, char *argv[]) {
  37   char *domain, addr[1024], cmd[1024], *crypted;
  38   FILE *pw;
  39   int rc;
  40
  41   if (argc != 4) {
  42     puts("Wrong number of arguments");
  43     return 1;
  44   }
  45
  46   if (strlen(argv[1]) >= 1024) {
  47     puts("Address too long");
  48     return 1;
  49   }
  50   strcpy(addr, argv[1]);
  51
  52   domain = strchr(addr, '@');
  53
  54   if (!domain) {
  55     puts("No @-sign found in address");
  56     return 1;
  57   }
  58   *domain = 0;
  59   ++domain;
  60
  61   if (!validDomain(addr)) {
  62     puts("Invalid local part");
  63     return 1;
  64   }
  65   if (!validDomain(domain)) {
  66     puts("Invalid domain");
  67     return 1;
  68   }
  69
  70   sprintf(cmd, "/usr/sbin/userdb -show \"%s/%s\" | /bin/grep ^systempw=", domain, argv[1]);
  71   pw = popen(cmd, "r");
  72   if (!pw) {
  73     puts("popen failure");
  74     return 1;
  75   }
  76
  77   if (fscanf(pw, "systempw=%1023[^\n]", cmd) != 1) {
  78     puts("Error parsing userdb output");
  79     return 1;
  80   }
  81
  82   pclose(pw);
  83
  84   memcpy(addr, cmd, 2);
  85   addr[2] = 0;
  86
  87   crypted = crypt(argv[2], addr);
  88
  89   if (!crypted) {
  90     puts("Error encrypting");
  91     return 1;
  92   }
  93
  94   if (strlen(crypted) > 200){
  95     puts("Encrypted password too long");
  96     return 1;
  97   }
  98
  99   if (strcmp(crypted, cmd)) {
 100     puts("Wrong password");
 101     return 2;
 102   }
 103
 104   sprintf(cmd, "/usr/sbin/userdbpw | /usr/sbin/userdb \"%s/%s\" set systempw", domain, argv[1]);
 105   pw = popen(cmd, "w");
 106
 107   if (!pw) {
 108     puts("Error running userdbpw");
 109     return 1;
 110   }
 111
 112   fputs(argv[3], pw);
 113   fputc('\n', pw);
 114
 115   rc = pclose(pw);
 116   if (rc) {
 117     puts("userdbpw error");
 118     return rc;
 119   }
 120
 121   return system("/usr/local/sbin/domtool-publish courier");
 122 }