模糊測試

鎖定

import java.security.SecureRandom;
import java.util.Random;

public class Fuzzer {
    private Random random = new SecureRandom();
    private int count = 1;

    public File fuzz(File in, int start, int length) throws IOException {
        byte[] data = new byte[(int) in.length()];
        DataInputStream din = new DataInputStream(new FileInputStream(in));
        din.readFully(data);
        fuzz(data, start, length);

        String name = "fuzz_" + count + "_" + in.getName();
        File fout = new File(name);
        FileOutputStream out = new FileOutputStream(fout);
        out.write(data);
        out.close();
        din.close();
        count++;

        return fout;
    }  // Modifies byte array in place

    public void fuzz(byte[] in, int start, int length) {
        byte[] fuzz = new byte[length];
        random.nextBytes(fuzz);
        System.arraycopy(fuzz, 0, in, start, fuzz.length);
    }
}