Big text file encrypt

[SC0U7]

Hello i have a text file which contain over 600KB of BASE64 strings like :

TVqQAAMAAAAEAAAA//8AALgAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...

Now what i need is divide this long string as autoit variable each max lenght (4000characters per line) example:

Local $var

$var &=  TVqQAAMAAAAEAAA..

$var &=  VbAmejwqqqAACEE..

and then how to i add encrypt function on every line ? how to i can xor it? example final will be :

$var &=  XorEnc(TVqQAAMAAAAEAAA..)

$var &=  XorEncVbAmejwqqqAACEE..)

 

Thanks for any help and ideas 

[AutoBert]

57 minutes ago, SC0U7 said:

Now what i need is divide this long string as autoit variable each max lenght (4000characters per line)

Use https://www.autoitscript.com/autoit3/docs/functions/StringMid.htm      

in a loop.

 

1 hour ago, SC0U7 said:

and then how to i add encrypt function on every line ?

Look at the https://www.autoitscript.com/autoit3/docs/libfunctions/_Crypt_EncryptData.htm

in Helpfile.

[Dragonfighter]

If you want to XOR them that maybe will help you

#include <String.au3>
$data=_StringToHex("Data")
$key=_StringToHex("key")
$encrytpted=BitXOR($data, $key)
ConsoleWrite("Hex Encrypted data: " & $encrytpted & @CRLF)
ConsoleWrite("Hex Text to encrypt: " & $data & @CRLF)
ConsoleWrite("Hex Key: " & $key & @CRLF)
ConsoleWrite("Hex XOR: " & BitXOR($data, $key) & @CRLF)

But if you do that for security it's a weak  encryption that is susceptible to cryptanalysis. For better encryption I suggest you to watch that:

Thats the most used and secure encryption algorithm. Remember encryption is not only XORing data and key together but protect data and key , to avoid that someone can get them through cryptanalysis, using confusion and diffusion. I think it will help you.

[Dragonfighter]

Remember to use the code box feature to post scripts, so other can faster help you.

[jchd]

1 hour ago, Dragon_Fighter said:

But if you do that for security it's a weak  encryption that is susceptible to cryptanalysis.

I whish you good luck cryptanalysing one-time-pads.

[Dragonfighter]

I wasn't speaking about one-time-pads.

[jchd]

One-time-pad is plaintext XOR full-size-key. How is that different from what you posted (except that sample key is a toy example)?

[Dragonfighter]

I at least had wrote a script to help SC0U7 and you start discussing without helping him. So stop discussing and try o help him without losing energy and time

[JLogan3o13]

@Dragon_Fighter calm down. Sometimes a question is just a question, and not a personal affront.

[Dragonfighter]

You're right JLogan3o13 I only want to make that discussion helful for SC0U7

[Dragonfighter]

Sorry I wrong I mean helpful and not helful

[Earthshine]

well, here we like to lead people to knowledge. well, some of us believe in that. It is not always best to offer up a coded solution as the OP will usually not learn as much. You can't teach people to read by reading for them, for instance.

still, the site here is full of people who will gladly run with specs and code it up... lol

Edited June 27, 2018 by Earthshine