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<?
/* -----------------------------------------------
@Author: Developped by Chr1s@EZScripts.net
@Site: http://www.EZScripts.net/
-----------------------------------------------
How`s the my encryption algorithm work:
First it will generate an encryption key with the string you supply:
Key 1 will be equal to the numerical value
of each character in your crypt key.
Key 2 will be equal to the length of your
crypt key.
For each character in the string you wish to encrypt, it will do
the following mathematical calculations, where V is the final value
of the encoded character and C is the value of the character currently
encrypting:
V = C * Key1
V = V + Key2
It will then separate each character in the original string with
a character between 65 and 90 (cap. letters).
To decrypt the string, it will do the opposite calculations, where
V is the final value of the decrypted character and C is the value
of the encrypted character:
V = V / Key1
V = C – Key2 */
/* -----------------------------------------------
@Name: Encrypt()
@Args: $txt-> String to encrypt.
@Args: $CRYPT_KEY -> String used to generate a encryption key.
@Returns: $estr -> Encrypted string.
----------------------------------------------- */
function encrypt($txt,$CRYPT_KEY){
if (!$txt && $txt != "0"){
return false;
exit;
}
if (!$CRYPT_KEY){
return false;
exit;
}
$kv = keyvalue($CRYPT_KEY);
$estr = "";
$enc = "";
for ($i=0; $i<strlen($txt); $i++) {
$e = ord(substr($txt, $i, 1));
$e = $e + $kv[1];
$e = $e * $kv[2];
(double)microtime()*1000000;
$rstr = chr(rand(65, 90));
$estr .= "$rstr$e";
}
return $estr;
}
/* -----------------------------------------------
@Name: Decrypt()
@Args: $txt-> String to decrypt.
@Args: $CRYPT_KEY -> String used to encrypt the string.
@Returns: $estr -> Decrypted string.
----------------------------------------------- */
function decrypt($txt, $CRYPT_KEY){
if (!$txt && $txt != "0"){
return false;
exit;
}
if (!$CRYPT_KEY){
return false;
exit;
}
$kv = keyvalue($CRYPT_KEY);
$estr = "";
$tmp = "";
for ($i=0; $i<strlen($txt); $i++) {
if ( ord(substr($txt, $i, 1)) > 64 && ord(substr($txt,
$i, 1)) < 91 ) {
if ($tmp != "") {
$tmp = $tmp / $kv[2];
$tmp = $tmp - $kv[1];
$estr .= chr($tmp);
$tmp = "";
}
} else {
$tmp .= substr($txt, $i, 1);
}
}
$tmp = $tmp / $kv[2];
$tmp = $tmp - $kv[1];
$estr .= chr($tmp);
return $estr;
}
/* -----------------------------------------------
@Name: keyvalue()
@Args: $CRYPT_KEY -> String used to generate a encryption key.
@Returns: $keyvalue -> Array containing 2 encryption keys.
----------------------------------------------- */
function keyvalue($CRYPT_KEY){
$keyvalue = "";
$keyvalue[1] = "0";
$keyvalue[2] = "0";
for ($i=1; $i<strlen($CRYPT_KEY); $i++) {
$curchr = ord(substr($CRYPT_KEY, $i, 1));
$keyvalue[1] = $keyvalue[1] + $curchr;
$keyvalue[2] = strlen($CRYPT_KEY);
}
return $keyvalue;
}
?>
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