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import java.security.*;
import java.security.spec.*;
import jdk.test.lib.security.SecurityUtils;

/**
 * @test
 * @bug 8205445
 * @library /test/lib
 * @summary Make sure old state is cleared when init is called again
 * @run main InitAgain default
 * @run main InitAgain SHA-256
 */
public class InitAgain {

    public static void main(String[] args) throws Exception {
        String mdName = args[0];
        PSSParameterSpec pssParamSpec = "default".equals(mdName) ? PSSParameterSpec.DEFAULT :
                new PSSParameterSpec(mdName, "MGF1", new MGF1ParameterSpec(mdName), 20, 1);

        byte[] msg = "hello".getBytes();

        Signature s1 = Signature.getInstance("RSASSA-PSS");
        Signature s2 = Signature.getInstance("RSASSA-PSS");

        s1.setParameter(pssParamSpec);
        s2.setParameter(pssParamSpec);

        String kpgAlgorithm = "RSA";
        KeyPairGenerator kpg = KeyPairGenerator.getInstance(kpgAlgorithm);
        kpg.initialize(SecurityUtils.getTestKeySize(kpgAlgorithm));
        KeyPair kp = kpg.generateKeyPair();

        s1.initSign(kp.getPrivate());
        s1.update(msg);
        s1.initSign(kp.getPrivate());
        s1.update(msg);
        // Data digested in s1:
        // Before this fix, msg | msg
        // After this fix, msg

        s2.initVerify(kp.getPublic());
        s2.update(msg);
        s2.initVerify(kp.getPublic());
        s2.update(msg);
        s2.initVerify(kp.getPublic());
        s2.update(msg);
        // Data digested in s2:
        // Before this fix, msg | msg | msg
        // After this fix, msg

        if (!s2.verify(s1.sign())) {
            throw new Exception();
        }
    }
}