test/jdk/sun/security/rsa/pss/InitAgain.java

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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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import java.security.*;
import java.security.spec.*;

/**
 * @test
 * @bug 8205445
 * @summary Make sure old state is cleared when init is called again
 */
public class InitAgain {

    public static void main(String[] args) throws Exception {

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

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

        s1.setParameter(PSSParameterSpec.DEFAULT);
        s2.setParameter(PSSParameterSpec.DEFAULT);

        KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
        kpg.initialize(1024);
        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();
        }
    }
}