lint/libs/lint-tests/src/test/java/com/android/tools/lint/checks/data/bytecode/SecureRandomTest.java.txt

package test.pkg;

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

public class SecureRandomTest {
    private static final long FIXED_SEED = 1000L;
    protected int getDynamicSeed() {  return 1; }

    public void testLiterals() {
        SecureRandom random1 = new SecureRandom();
        random1.setSeed(System.currentTimeMillis()); // OK
        random1.setSeed(getDynamicSeed()); // OK
        random1.setSeed(0); // Wrong
        random1.setSeed(1); // Wrong
        random1.setSeed((int)1023); // Wrong
        random1.setSeed(1023L); // Wrong
        random1.setSeed(FIXED_SEED); // Wrong
    }

    public void testRandomTypeOk() {
        Random random2 = new Random();
        random2.setSeed(0); // OK
    }

    public void testRandomTypeWrong() {
        Random random3 = new SecureRandom();
        random3.setSeed(0); // Wrong: owner is java/util/Random, but applied to SecureRandom object
    }

    public void testBytesOk() {
        SecureRandom random1 = new SecureRandom();
        byte[] seed = random1.generateSeed(4);
        random1.setSeed(seed); // OK
    }

    public void testBytesWrong() {
        SecureRandom random2 = new SecureRandom();
        byte[] seed = new byte[3];
        random2.setSeed(seed); // Wrong
    }
}