xork is pronounced xork.

In response to an inquiry on the full-disclosure mailing list, wherein somebody asked for a quick-and-dirty way of encrypting things from the command line, I have written xork. It is puny and weak, but it amused me.

I welcome any suggestions, as I am not l33t.

Update: Yes, I’m well aware that this is the cryptographic equivalent of the locks that tourists put on their luggage. Thank you.

This entry was written by mhoye, posted on October 25, 2004 at 12:48 pm, filed under digital. Bookmark the permalink. Follow any comments here with the RSS feed for this post. Both comments and trackbacks are currently closed.

5 Comments

  1. Matlab port
    Posted October 26, 2004 at 1:03 am | Permalink

    %
    % a matlab port of xork code
    %

    % input file names
    f1=input(‘Filename to encrypt/decrypt: ‘,’s');
    f2=input(‘Filename to use as cypher: ‘,’s');
    f3=input(‘Output file name: ‘,’s');

    % read in files
    fid1=fopen(f1);
    d1=fread(fid1,’*char’);
    fclose(fid1);

    fid2=fopen(f2);
    d2=fread(fid2,’*char’);
    fclose(fid2);

    %xor files with wrap around
    c=[];
    for j = 1: length(d1)
    c(end+1)=double(bitxor(uint8(d1(j)),uint8(d2(mod(j-1,length(d2))+1))));
    end

    %write output file
    fid3=fopen(f3,’wb’);
    d3=fwrite(fid3,char(c),’uchar’);
    fclose(fid3);

    Weeeeeeee :)

  2. Mike Hoye
    Posted October 27, 2004 at 12:10 am | Permalink

    The following was also written in Matlab:

    Warning: fsockopen(): unable to connect to 69.70.209.171:8000 in /var/www/quantumcat.off.net/html/index.php on line 78
    !!! ERROR !!! — Sorry, can’t talk to the quantumcat server I wrote… I’m sorry some stuff won’t work.. so check back later… when this message is gone.. it’s working again! – sean.

    Matlab: RAD tools for the flagrant overuse of exclamation points and ellipses.

  3. DQ
    Posted October 27, 2004 at 12:16 am | Permalink

    Shouldn’t the fgetc in following snippet from xork.c be “xagchar=fgetc(….)”

    > if (xagchar == EOF) {
    > rewind(xor_against_file);
    > fgetc(xor_against_file);
    > }

  4. Mike Hoye
    Posted October 27, 2004 at 12:31 am | Permalink

    Yes. Yes it should.

  5. Mike Hoye
    Posted October 27, 2004 at 12:50 am | Permalink

    Fixed. Added key-weakness metric too, just for kicks.