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package org.spongycastle.crypto.agreement.jpake;
import java.math.BigInteger;
import org.spongycastle.util.Arrays;
/**
* The payload sent/received during the first round of a J-PAKE exchange.
* <p/>
* <p/>
* 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#createRound1PayloadToSend()}.
* <p/>
* <p/>
* Each {@link JPAKEParticipant} must also validate the payload
* received from the other {@link JPAKEParticipant}.
* The received payload should be validated via
* {@link JPAKEParticipant#validateRound1PayloadReceived(JPAKERound1Payload)}.
* <p/>
*/
public class JPAKERound1Payload
{
/**
* The id of the {@link JPAKEParticipant} who created/sent this payload.
*/
private final String participantId;
/**
* The value of g^x1
*/
private final BigInteger gx1;
/**
* The value of g^x2
*/
private final BigInteger gx2;
/**
* The zero knowledge proof for x1.
* <p/>
* This is a two element array, containing {g^v, r} for x1.
*/
private final BigInteger[] knowledgeProofForX1;
/**
* The zero knowledge proof for x2.
* <p/>
* This is a two element array, containing {g^v, r} for x2.
*/
private final BigInteger[] knowledgeProofForX2;
public JPAKERound1Payload(
String participantId,
BigInteger gx1,
BigInteger gx2,
BigInteger[] knowledgeProofForX1,
BigInteger[] knowledgeProofForX2)
{
JPAKEUtil.validateNotNull(participantId, "participantId");
JPAKEUtil.validateNotNull(gx1, "gx1");
JPAKEUtil.validateNotNull(gx2, "gx2");
JPAKEUtil.validateNotNull(knowledgeProofForX1, "knowledgeProofForX1");
JPAKEUtil.validateNotNull(knowledgeProofForX2, "knowledgeProofForX2");
this.participantId = participantId;
this.gx1 = gx1;
this.gx2 = gx2;
this.knowledgeProofForX1 = Arrays.copyOf(knowledgeProofForX1, knowledgeProofForX1.length);
this.knowledgeProofForX2 = Arrays.copyOf(knowledgeProofForX2, knowledgeProofForX2.length);
}
public String getParticipantId()
{
return participantId;
}
public BigInteger getGx1()
{
return gx1;
}
public BigInteger getGx2()
{
return gx2;
}
public BigInteger[] getKnowledgeProofForX1()
{
return Arrays.copyOf(knowledgeProofForX1, knowledgeProofForX1.length);
}
public BigInteger[] getKnowledgeProofForX2()
{
return Arrays.copyOf(knowledgeProofForX2, knowledgeProofForX2.length);
}
}
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