<? $ralphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz!,.:;?~@%^*()_-=][}{/><|"; # $ralphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\\!,.:;?~@#\$%^&*()_+-=][}{/><\"'`|"; $alphabet = $ralphabet . $ralphabet; class Crypto { function encrypt ($password,$strtoencrypt) { $strtoencrypt = str_replace("\t","[tab]",$strtoencrypt); $strtoencrypt = str_replace("\n","[new]",$strtoencrypt); $strtoencrypt = str_replace("\r","[ret]",$strtoencrypt); $strtoencrypt = base64_encode($strtoencrypt); global $ralphabet; global $alphabet; for( $i=0; $i<strlen($password); $i++ ) { $cur_pswd_ltr = substr($password,$i,1); $pos_alpha_ary[] = substr(strstr($alphabet,$cur_pswd_ltr),0,strlen($ralphabet)); } $i=0; $n = 0; $nn = strlen($password); $c = strlen($strtoencrypt); while($i<$c) { $encrypted_string .= substr($pos_alpha_ary[$n],strpos($ralphabet,substr($strtoencrypt,$i,1)),1); $n++; if($n==$nn) $n = 0; $i++; } return $encrypted_string; } function decrypt ($password,$strtodecrypt) { global $ralphabet; global $alphabet; for( $i=0; $i<strlen($password); $i++ ) { $cur_pswd_ltr = substr($password,$i,1); $pos_alpha_ary[] = substr(strstr($alphabet,$cur_pswd_ltr),0,strlen($ralphabet)); } $i=0; $n = 0; $nn = strlen($password); $c = strlen($strtodecrypt); while($i<$c) { $decrypted_string .= substr($ralphabet,strpos($pos_alpha_ary[$n],substr($strtodecrypt,$i,1)),1); $n++; if($n==$nn) $n = 0; $i++; } $decrypted_string = str_replace("[tab]","\t", $decrypted_string); $decrypted_string = str_replace("[new]","\n", $decrypted_string); $decrypted_string = str_replace("[ret]","\r", $decrypted_string); return base64_decode($decrypted_string); } function cryption_table ($password) { global $ralphabet; global $alphabet; $table = ""; for( $i=0; $i<strlen($password); $i++ ) { $cur_pswd_ltr = substr($password,$i,1); $pos_alpha_ary[] = substr(strstr($alphabet,$cur_pswd_ltr),0,strlen($ralphabet)); } $table .= "<table border=1 cellpadding=\"0\" cellspacing=\"0\">\n"; $table .= "<tr><td></td>"; for( $j=0; $j<strlen($ralphabet); $j++ ) { $ltr = substr($ralphabet,$j,1); $table .= <<<EOF <td align="center"><font size="2" face="arial">$ltr</td> EOF;} print "</tr>"; for( $i=0; $i<count($pos_alpha_ary); $i++ ) { $z = $i + 1; $table .= <<<EOF <tr><td align="right"><font size="2"><b>$z</b></font></td> EOF;for( $k=0; $k<strlen($pos_alpha_ary[$i]); $k++ ) { $ltr = substr($pos_alpha_ary[$i],$k,1); $table .= <<<EOF <td align="center"> <font color="red" size="2" face="arial">$ltr</td> EOF;} $table .= "</tr>"; } $table .= "</table>\n"; return $table; } } ?>