?
Solved

what input will diffuse bomb?

Posted on 2009-05-15
1
Medium Priority
?
345 Views
Last Modified: 2012-05-07
this is decompiled assembly.

it looks like this accepts two numbers as input.

from what i can tell Vfffffffc   must be between 0-4 and eax must be equal to Vfffffff8 or function explode_bomb is called.

the value of Vfffffffc    determines which case of the switch statement is executed.... then the code jumps to the value of "goto"... then the rest of the statements are excuted.

is that accurate?
/*	Procedure: 0x08048EC1 - 0x08048F80
 *	Argument size: -76
 *	Local size: 40
 *	Save regs size: 0
 *	Called by:
 *		main()
 */
 
phase_3(A8)
/* unknown */ void  A8;
{
	/* unknown */ void  V0;
	/* unknown */ void  V4;
	/* unknown */ void  V8;
	/* unknown */ void  Vfffffff8;
	/* unknown */ void  Vfffffffc;
 
    V8 = & Vfffffff8;
    V4 = & Vfffffffc;
    V0 = "%d %d";
    *esp = A8;
    if(L080489D4() <= 1) {
        explode_bomb();
    }
    if(Vfffffffc <= 7) {
        switch(Vfffffffc) {
            case 0:
                eax = 0x304;
                goto L08048f3e;
            case 1:
                eax = 0;
                goto L08048f3e;
            case 2:
                eax = 0;
                asm("o16 nop");
                goto L08048f43;
            case 3:
                eax = 0;
                goto L08048f48;
            case 4:
                eax = 0;
                asm("o16 nop");
                goto L08048f4b;
            case 5:
                eax = 0;
                goto L08048f50;
            case 6:
                eax = 0;
                asm("o16 nop");
                goto L08048f55;
            case 7:
L08048f02:
                eax = 0;
                goto L08048f5a;
        }
        goto L08048f02;
L08048f3e:
        eax = eax - 0x3ba;
L08048f43:
        eax = eax + 0x134;
L08048f48:
        eax = eax - 0x74;
L08048f4b:
        eax = eax + 0x118;
L08048f50:
        eax = eax - 0x308;
L08048f55:
        eax = eax + 0x308;
L08048f5a:
        eax = eax - 0xa4;
    } else {
        explode_bomb();
        eax = 0;
    }
    if(Vfffffffc > 5 || eax != Vfffffff8) {
        eax = explode_bomb();
    }
}

Open in new window

0
Comment
Question by:braker15
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 1

Accepted Solution

by:
braker15 earned 0 total points
ID: 24401197
nevermind i figured it out
0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Preface I don't like visual development tools that are supposed to write a program for me. Even if it is Xcode and I can use Interface Builder. Yes, it is a perfect tool and has helped me a lot, mainly, in the beginning, when my programs were small…
This is a short and sweet, but (hopefully) to the point article. There seems to be some fundamental misunderstanding about the function prototype for the "main" function in C and C++, more specifically what type this function should return. I see so…
Video by: Grant
The goal of this video is to provide viewers with basic examples to understand and use for-loops in the C programming language.
The goal of this video is to provide viewers with basic examples to understand and use conditional statements in the C programming language.
Suggested Courses
Course of the Month8 days, 10 hours left to enroll

765 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question