defcon20 bin200

#include <stdio.h>

int main(int argc, char *argv[])
{
	char fname[] = "c:\\mac.h";
	char buf[1024] = {0};
	FILE* fp;
	int ret = 0;

	fp = fopen(fname, "r");
	if (fp < 0)
	{
		printf("fopen error\n");
		return -1;
	}
	ret = fread(buf,1,991, fp);
	
	printf("buf: %s\n\n", buf);

	__asm{
		xor ecx, ecx
		mov edx, 1
		lea eax, dword ptr buf
		xor ebx, ebx
		dec eax
		dec ecx
#if 1 
badcob:
		inc eax
		inc ecx
		mov bl, byte ptr ss:[eax]
		not bl
		mov byte ptr ss:[eax], bl
		cmp ecx, 0x3df
		jnz badcob		
#endif
	}

		

	printf("buf: %s\n", buf);
	fclose(fp);
	return 0;
}