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/* rbcrack.c - a Ruby interface to CrackLib
*
* $Id: rbcrack.c,v 1.20 2006/03/02 19:41:44 ianmacd Exp $
*
* Version : 0.5.3
* Author : Ian Macdonald <ian@caliban.org>
*
* Copyright (C) 2002-2006 Ian Macdonald
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <ruby.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <crack.h>
#include "rbcrack.h"
VALUE ePassword_DictionaryError;
VALUE ePassword_WeakPassword;
/* <b>check</b><em>(dict=nil)</em>
*
* This interfaces to LibCrack to check the strength of the password. If
* _dict_ is given, it is the path to the CrackLib dictionary, minus the
* file's extension. For example, if the dictionary is located at
* <tt>/usr/lib/cracklib_dict.pwd</tt>, _dict_ would be
* <tt>/usr/lib/cracklib_dict</tt>. If it is not given, the dictionary found
* at build time will be used.
*
* If a path is given that does not lead to a legible dictionary, a
* Password::DictionaryError exception is raised. On success, +true+ is
* returned. On failure, a Password::WeakPassword exception is raised.
*/
static VALUE passwd_check(VALUE self, VALUE args)
{
VALUE dict;
char *objection;
char *buffer;
/* pop the one and only argument we may have been passed */
dict = rb_ary_pop(args);
if (dict == Qnil || strcmp(StringValuePtr(dict), "") == 0) {
/* no argument passed, so use default location from rbcrack.h */
dict = rb_str_new2(CRACK_DICT);
} else {
buffer = malloc(strlen(StringValuePtr(dict)) + 8);
strcpy(buffer, StringValuePtr(dict));
strcat(buffer, ".pwd");
if (access(buffer, R_OK) != 0) {
free(buffer);
rb_raise(ePassword_DictionaryError, "%s", strerror(errno));
}
free(buffer);
}
/* perform check on password */
objection = FascistCheck(StringValuePtr(self), StringValuePtr(dict));
/* return true on success; raise an exception otherwise */
if (objection) {
rb_raise(ePassword_WeakPassword, "%s", objection);
} else {
return Qtrue;
}
}
/* initialize this class */
void Init_password_crack()
{
VALUE cPassword;
/* define the Password class */
cPassword = rb_define_class("Password", rb_cString);
/* define the Password::DictionaryError exception */
ePassword_DictionaryError =
rb_define_class_under(cPassword, "DictionaryError",
rb_eStandardError);
/* define the Password::WeakPassword exception */
ePassword_WeakPassword =
rb_define_class_under(cPassword, "WeakPassword",
rb_eStandardError);
/* define the Password.check method */
rb_define_method(cPassword, "check", passwd_check, -2);
return;
}
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