39 import javax.crypto.KeyAgreementSpi;

    39 import javax.crypto.KeyAgreementSpi;

    40 import javax.crypto.ShortBufferException;

    40 import javax.crypto.ShortBufferException;

    41 import javax.crypto.SecretKey;

    41 import javax.crypto.SecretKey;

    42 import javax.crypto.spec.*;

    42 import javax.crypto.spec.*;

    43 

    43 

    44 /**

    46 /**

    45  * This class implements the Diffie-Hellman key agreement protocol between

    47  * This class implements the Diffie-Hellman key agreement protocol between

    46  * any number of parties.

    48  * any number of parties.

    47  *

    49  *

    48  * @author Jan Luehe

    50  * @author Jan Luehe

   197             throw new InvalidKeyException("Incompatible parameters");

   199             throw new InvalidKeyException("Incompatible parameters");

   198         }

   200         }

   199         if (pub_g != null && !(init_g.equals(pub_g))) {

   201         if (pub_g != null && !(init_g.equals(pub_g))) {

   200             throw new InvalidKeyException("Incompatible parameters");

   202             throw new InvalidKeyException("Incompatible parameters");

   201         }

   203         }

   202 

   207 

   203         // store the y value

   208         // store the y value

   204         this.y = dhPubKey.getY();

   209         this.y = dhPubKey.getY();

   205 

   210 

   206         // we've received a public key (from one of the other parties),

   211         // we've received a public key (from one of the other parties),