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<?php
/**
*
* @package AESEncryption
* @author DGDevelopments
* @license http://opensource.org/licenses/gpl-2.0.php
*/
class AESEncryption {
public function Encrypt ($String){
/*
* Encrypts provided string and condenses vital information into a single string
*
* @param | string | $String The string to be encrypted using AES
* @return | Encrypt | returns an encrypted string with other vital information condensed into a single string
*/
$Size = mcrypt_get_iv_size(MCRYPT_CAST_256,MCRYPT_MODE_CBC);
$IV = mcrypt_create_iv($Size,MCRYPT_RAND);
$Hash = strlen($String);
$Encrypted_String = openssl_encrypt($String, "AES-256-CBC",$Hash,0,$IV);
$Hash_Count = count(str_split($Hash));
$EncStr_Arr = str_split($Encrypted_String);
$Count = strlen($IV);
$Increment = 0;
$Return_String = "";
$Return_String .= $Hash_Count.$Count.$Hash;
while ($Increment < $Count){
$Return_String .= $IV[$Increment];
$Return_String .= $Encrypted_String[$Increment];
unset($EncStr_Arr[$Increment]);
$Increment++;
}
$Encrypted_String = implode("",$EncStr_Arr);
return $Return_String.$Encrypted_String;
}
public function DeCrypt ($String){
/*
* Maniuplate string data to obtain the correct information to decrypt an encrypted string
*
* @param | string | The encrypted string
* @return | Returns a decrypted string using the information provided in $string
*/
$String_Array = str_split($String);
$Hash_Count = $String_Array[0];
unset($String_Array[0]);
$IVLength = $String_Array[1].$String_Array[2];
$Hash = NULL;
unset($String_Array[1]);
unset($String_Array[2]);
$Hash_Incrementer = 0;
$String_Array = array_values($String_Array);
while ($Hash_Incrementer < $Hash_Count){
$Hash .= $String_Array[$Hash_Incrementer];
unset($String_Array[$Hash_Incrementer]);
$Hash_Incrementer++;
}
array_unshift($String_Array, null);
unset($String_Array[0]);
$IV = null;
$Encrypted_String = null;
foreach ($String_Array AS $Key => $Value){
if($Key&1) {
$IV .= $Value;
} else {
$Encrypted_String .= $Value;
}
unset($String_Array[$Key]);
if ($IVLength*2 == $Key){
break;
}
}
return openssl_decrypt($Encrypted_String.implode("",$String_Array),"AES-256-CBC",(int)$Hash,0,$IV);
}
} // End Class
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