com.fitbur.bouncycastle.crypto.agreement.jpake.JPAKERound2Payload Maven / Gradle / Ivy
package com.fitbur.bouncycastle.crypto.agreement.jpake;
import java.math.BigInteger;
import com.fitbur.bouncycastle.util.Arrays;
/**
* The payload sent/received during the second round of a J-PAKE exchange.
*
* Each {@link JPAKEParticipant} creates and sends an instance
* of this payload to the other {@link JPAKEParticipant}.
* The payload to send should be created via
* {@link JPAKEParticipant#createRound2PayloadToSend()}
*
* Each {@link JPAKEParticipant} must also validate the payload
* received from the other {@link JPAKEParticipant}.
* The received payload should be validated via
* {@link JPAKEParticipant#validateRound2PayloadReceived(JPAKERound2Payload)}
*/
public class JPAKERound2Payload
{
/**
* The id of the {@link JPAKEParticipant} who created/sent this payload.
*/
private final String participantId;
/**
* The value of A, as com.fitburputed during round 2.
*/
private final BigInteger a;
/**
* The zero knowledge proof for x2 * s.
*
* This is a two element array, containing {g^v, r} for x2 * s.
*/
private final BigInteger[] knowledgeProofForX2s;
public JPAKERound2Payload(
String participantId,
BigInteger a,
BigInteger[] knowledgeProofForX2s)
{
JPAKEUtil.validateNotNull(participantId, "participantId");
JPAKEUtil.validateNotNull(a, "a");
JPAKEUtil.validateNotNull(knowledgeProofForX2s, "knowledgeProofForX2s");
this.participantId = participantId;
this.a = a;
this.knowledgeProofForX2s = Arrays.copyOf(knowledgeProofForX2s, knowledgeProofForX2s.length);
}
public String getParticipantId()
{
return participantId;
}
public BigInteger getA()
{
return a;
}
public BigInteger[] getKnowledgeProofForX2s()
{
return Arrays.copyOf(knowledgeProofForX2s, knowledgeProofForX2s.length);
}
}