Encrypting a string

[SoyArcano]

Hello i'm learning a little of cryptography only for educationals purporses. In my case i'm only trying to encrypt a easy string any string and then decrypt it and show it.

The code is:

ConsoleWrite(EnDeCrypt("What i am doing wrong","1234"))


;To ENcrypt and to DEcrypt your data.
Func EnDeCrypt($plaintxt, $psw)
    Local $a, $b, $i, $j, $k, $cipherby, $cipher
    Local $tempSwap, $temp, $intLength
    Local $sbox[256]
    Local $key[256]

    $intLength = StringLen($psw)
    For $a = 0 To 255
        $key[$a] = asc(Stringmid($psw, Mod($a ,$intLength)+1, 1))
        $sbox[$a] = $a
    Next

    $b = 0
    For $a = 0 To 255
        $b = Mod(($b + $sbox[$a] + $key[$a]),256)
        $tempSwap = $sbox[$a]
        $sbox[$a] = $sbox[$b]
        $sbox[$b] = $tempSwap
    Next

    For $a = 1 To StringLen($plaintxt)
        $i = Mod(($i + 1) ,256)
        $j = Mod(($j + $sbox[$i]) ,256)
        $k = $sbox[Mod(($sbox[$i] + $sbox[$j]) , 256)]

        $cipherby = BitXOR(Asc(StringMid($plaintxt, $a, 1)) , $k)
        $cipher = $cipher & Chr($cipherby)
    Next
    
    Return $cipher
EndFunc

Never write me the encrypted and decrypted string in console., only for string nothing bad.. thx!

Edited April 2, 2017 by SoyArcano

[InunoTaishou]

Any reason you're trying to re-invent the wheel?

[SoyArcano]

Oh thx i was searching that!

[Luigi]

Exist an equivalent of this in PHP and Java?

 

Decrypt an encrypted message from AutoIt  in PHP or Java (Android Studio)?

[InunoTaishou]

Java

PHP

[Inververs]

PHP <-> AutoIt

[Luigi]

@Inververs thank you.

This is exactly what I asked, a script that encrypts in AutoIt and decrypts the message in PHP (or Java).

Very usefull.

Edited April 3, 2017 by Luigi

[Luigi]

ops, wrong post...

Edited April 3, 2017 by Luigi