21  * questions.

    21  * questions.

    22  */

    22  */

    23 

    23 

    24 /*

    24 /*

    25  * @test

    25  * @test

    28  * @summary verify that modPow() not broken by the special case for 65537 (use -Dseed=X to set PRNG seed)

    30  * @summary verify that modPow() not broken by the special case for 65537 (use -Dseed=X to set PRNG seed)

    29  * @author Andreas Sterbenz

    31  * @author Andreas Sterbenz

    30  * @key randomness

    32  * @key randomness

    31  */

    33  */

    32 

    34 

    33 import java.math.BigInteger;

    35 import java.math.BigInteger;

    34 

    36 

    35 import java.security.*;

    37 import java.security.*;

    36 import java.security.spec.*;

    38 import java.security.spec.*;

    37 

    40 

    38 public class ModPow65537 {

    41 public class ModPow65537 {

    39 

    42 

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

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

    41         // SunRsaSign uses BigInteger internally

    44         // SunRsaSign uses BigInteger internally

    77     }

    80     }

    78 

    81 

    79     private static void testSigning(KeyPair kp) throws Exception {

    82     private static void testSigning(KeyPair kp) throws Exception {

    80         System.out.println(kp.getPublic());

    83         System.out.println(kp.getPublic());

    81         byte[] data = new byte[1024];

    84         byte[] data = new byte[1024];

    85 

    87 

    86         Signature sig = Signature.getInstance("SHA1withRSA", "SunRsaSign");

    88         Signature sig = Signature.getInstance("SHA1withRSA", "SunRsaSign");

    87         sig.initSign(kp.getPrivate());

    89         sig.initSign(kp.getPrivate());

    88         sig.update(data);

    90         sig.update(data);

    89         byte[] sigBytes = sig.sign();

    91         byte[] sigBytes = sig.sign();