Redshirt2 decryption!

[Cade]

Whole VB Code, works properly when decoding but not encoding. Anyone know why? Command1 decodes, command2 encodes, assuming the data is stored in text1.text

Not to be a prick, but you really need to tab your code.

Everyone tells me that

Right, changed Integer to Long.

Any ideas why encoding doesnt work?

Edit: I opened and decoded the language file. It has corrupted my fragile little mind.

[Uniter]

LOL, RFC Compliant code... adds/ removes redshirt2 tag appropriately.

De-Redshirt2

Code: Select all

#include <stdlib.h>
#include <stdio.h>
int main() {
   int KTIndex=0;
   char CurrChar, KeyTable[16] = {0x1F, 0x07, 0x09, 0x01, 0x0B, 0x02, 0x05, 0x05, 0x03, 0x11, 0x28, 0x0C, 0x23, 0x16, 0x1B, 0x02};
   FILE * Encd;
   FILE * Outf;
   Encd = fopen ("RedOut.txt","rb");
   Outf = fopen ("RedIn.txt","wb+");
   printf("Adding RedShirt2\n");
   fputs ("redshirt2",Outf);
    if ((Encd!=NULL)&&(Outf!=NULL)) {
      while(true) {
         CurrChar=fgetc (Encd);
         if (CurrChar==EOF) break;
         if(CurrChar > 0x20) {
            KTIndex++;
            KTIndex%=16;

            CurrChar+=KeyTable[KTIndex];

            if(CurrChar < 0x20)
               CurrChar-=0x5f;
         }
         fputc (CurrChar , Outf);
      }
   }
   else ;

   return(0);
}



Redshirt2

Code: Select all

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
int main() {
   int KTIndex=0;
   char CurrChar, KeyTable[16] = {0x1F, 0x07, 0x09, 0x01, 0x0B, 0x02, 0x05, 0x05, 0x03, 0x11, 0x28, 0x0C, 0x23, 0x16, 0x1B, 0x02};
   FILE * Encd;
   FILE * Outf;
   Encd = fopen ("RedIn.txt","rb");
   Outf = fopen ("RedOut.txt","wb+");
   printf("fseek()\n");
   fseek (Encd,strlen("redshirt2"),SEEK_SET); //uses strlen just to show....
    if ((Encd!=NULL)&&(Outf!=NULL)) {
      while(true) {
         CurrChar=fgetc (Encd);
         if (CurrChar==EOF) break;
         if(CurrChar > 0x20) {
            KTIndex++;
            KTIndex%=16;

            CurrChar-=KeyTable[KTIndex];

            if(CurrChar < 0x20)
               CurrChar+=0x5f;
         }
         fputc (CurrChar , Outf);
      }
   }
   else ;

   return(0);
}


[xander]

Not to be a total n00b, but how to I compile / use this code? If it helps, I am running Mac OS X, and I do have the developer tools installed. My only experience with any kind of C code is typing configure / make / make install on a Linux box 5 years ago ^_^

Thanks,
xander

[Gaspar]

I'd also like to know this but for windows. Any help would be much appriciated.

Thanks In Advance

[vogelap]

I'd also like to know this but for windows. Any help would be much appriciated.

Same here.

[DaveNI]

Whole VB Code, works properly when decoding but not encoding. Anyone know why? Command1 decodes, command2 encodes, assuming the data is stored in text1.text

Not to be a prick, but you really need to tab your code.

Everyone tells me that

Right, changed Integer to Long.

Any ideas why encoding doesnt work?

Edit: I opened and decoded the language file. It has corrupted my fragile little mind.

OK, I've just run a couple of test strings - e.g abcdefabcdef, 1234567890, abcdefghijklmnopqrstuvwxyz, through the code.

Key in the string and then press the decode and encode buttons which should return the original text - the alpha strings work fine, but the numeric strings (or any string with one or more of the more esoteric ascii characters) does not come back correctly after the cycle.

Hope this gives some clues - I'll look at the code further later.

DaveG

[DaveNI]

in the vb code the error in the encryption is

If CP < &H20 Then
CP = CP - &H5F
End If

Which if you follow the logic says that if the character is less than ascii 32, then subtract 95.

the code should be

If CP > &H7F then
CP = CP - &H5F
End If



DaveG

[Draugluin]

VB.net binary, encrypts and decrypts
http://www.draugluin.com/redshirt2_tool.zip
Put the exe somewhere and run it. Ctrl-V to paste, Ctrl-A to select all, Ctrl-C to copy. No saving or loading, just wanted to get this out.

• I used the posted vb code and put a button on it
• It assumes encrypted text starts with "redshirt2"
• It's pretty slow on big things
• Probably requires the .NET Framework

edit:added more, etc

[Cade]

in the vb code the error in the encryption is

If CP < &H20 Then
CP = CP - &H5F
End If

Which if you follow the logic says that if the character is less than ascii 32, then subtract 95.

the code should be

If CP > &H7F then
CP = CP - &H5F
End If



DaveG

This works. Thanks. Ive uploaded a compiled exe. However, due on part to my lazyness, remove redshirt2 from the beginning of the text when decoding.

http://aura-blue.com/cade/redshirt2.exe

[Starfyre]

VB.net binary, encrypts and decrypts
http://www.draugluin.com/redshirt2_tool.zip
Put the exe somewhere and run it. Ctrl-V to paste, Ctrl-A to select all, Ctrl-C to copy. No saving or loading, just wanted to get this out.

Thanks, man, works like a dream.
Even for programming-stupid people like me

[Draugluin]

Updated, added automatic copy to clipboard option. Whatever's in the window after you hit the magic button gets put into the clipboard. Same place. http://www.draugluin.com/redshirt2_tool.zip

[Draugluin]

Shouldn't this be moved to modding?

[Jackmn]

Yes. There wasn't a modding section when I first made it =)

[Cyberdyne]

http://www.cyberdyne.homecall.co.uk/Redshirt2.rar

Command line tool to decrypt/encrypt Redshirt2.
Automatic removal and insertion of redshirt2 header.
Included .bat files decrypt/encrypt all files in your Darwinia user directory.
Edit path to your own user directory in .bat files
e.g.
FOR %%A IN ("D:\Darwinia\users\Cyberdyne") DO SET STRING=%%A

Usage: Redshirt2 [-d] [-e] <source file> <output file>

Options
-d decrypts redshirt2
-e encrypts redshirt2

[xander]

As this question did not really get answered a while back, I will ask again: is there anyone that can help me get this running on a Mac? I know very little about compiling code, and would appreciate either (a) a walkthrough on compiling this thing for OS X or (b) a compiled binary.

Thank you,
xander