Thread: Security question...

  1. #1
    Registered User
    Join Date
    Jan 2006

    Security question...

    **Repost from Linux forum**

    I'm wanting my program to pass a command to the system which will unzip a password protected zip file. How can I make this system call that will include the password without someone being able to evesdrop and obtain the password?

    Also, by storing the password in my program as a string, would some one be able to somehow obtain the password from the binary?

  2. #2
    Registered User
    Join Date
    Mar 2006
    1. You can't.

    2. Sure. Just open the EXE in a hex editor, or disassemble it.

    In any case, the password will be in the computer RAM when your program is running, and it is techically possible, using specialized utilities, to look into the RAM.
    #include <stdio.h>
    void J(char*a){int f,i=0,c='1';for(;a[i]!='0';++i)if(i==81){
    /3*3+f/3*9+f%3]==c||a[i%9+f*9]==c||a[i-i%9+f]==c)goto e;a[i]=c;J(a);a[i]
    ='0';e:;}}int main(int c,char**v){int t=0;if(c>1){for(;v[1][
    t];++t);if(t==81){J(v[1]);return 0;}}puts("sudoku [0-9]{81}");return 1;}

  3. #3
    and the hat of int overfl Salem's Avatar
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    Aug 2001
    The edge of the known universe
    See your first thread - and don't cross-post.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

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