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 <crypt.h>
  28 #include <string.h>
  29
  30 int validDomain(const char *dom) {
  31   for (; *dom; ++dom)
  32     if (*dom != '.' && *dom != '_' && *dom != '-' && !isalnum(*dom))
  33       return 0;
  34   return 1;
  35 }
  36
  37 int main(int argc, char *argv[]) {
  38   char *domain, addr[1024], cmd[1024], *crypted;
  39   FILE *pw;
  40   int rc;
  41
  42   if (argc != 4) {
  43     puts("Wrong number of arguments");
  44     return 1;
  45   }
  46
  47   if (strlen(argv[1]) >= 1024) {
  48     puts("Address too long");
  49     return 1;
  50   }
  51   strcpy(addr, argv[1]);
  52
  53   domain = strchr(addr, '@');
  54
  55   if (!domain) {
  56     puts("No @-sign found in address");
  57     return 1;
  58   }
  59   *domain = 0;
  60   ++domain;
  61
  62   if (!validDomain(addr)) {
  63     puts("Invalid local part");
  64     return 1;
  65   }
  66   if (!validDomain(domain)) {
  67     puts("Invalid domain");
  68     return 1;
  69   }
  70
  71   sprintf(cmd, "/usr/sbin/userdb -show \"%s/%s\" | /bin/grep ^systempw=", domain, argv[1]);
  72   pw = popen(cmd, "r");
  73   if (!pw) {
  74     puts("popen failure");
  75     return 1;
  76   }
  77
  78   if (fscanf(pw, "systempw=%1023[^\n]", cmd) != 1) {
  79     puts("Error parsing userdb output");
  80     return 1;
  81   }
  82
  83   pclose(pw);
  84
  85   memcpy(addr, cmd, 2);
  86   addr[2] = 0;
  87
  88   crypted = crypt(argv[2], addr);
  89
  90   if (!crypted) {
  91     puts("Error encrypting");
  92     return 1;
  93   }
  94
  95   if (strlen(crypted) > 200){
  96     puts("Encrypted password too long");
  97     return 1;
  98   }
  99
 100   if (strcmp(crypted, cmd)) {
 101     puts("Wrong password");
 102     return 2;
 103   }
 104
 105   sprintf(cmd, "/usr/sbin/userdbpw | /usr/sbin/userdb \"%s/%s\" set systempw", domain, argv[1]);
 106   pw = popen(cmd, "w");
 107
 108   if (!pw) {
 109     puts("Error running userdbpw");
 110     return 1;
 111   }
 112
 113   fputs(argv[3], pw);
 114   fputc('\n', pw);
 115
 116   rc = pclose(pw);
 117   if (rc) {
 118     puts("userdbpw error");
 119     return rc;
 120   }
 121
 122   return system("/usr/local/sbin/domtool-publish courier");
 123 }