Top Description Fields Constructors Methods

org.bouncycastle.crypto.agreement

public Class SM2KeyExchange

Class Inheritance

extends Object

java.lang.Object
org.bouncycastle.crypto.agreement.SM2KeyExchange

Imports

java.math.BigInteger, org.bouncycastle.crypto.CipherParameters, .CryptoServicesRegistrar, .Digest, org.bouncycastle.crypto.digests.SM3Digest, org.bouncycastle.crypto.params.ECDomainParameters, .ECPrivateKeyParameters, .ParametersWithID, .SM2KeyExchangePrivateParameters, .SM2KeyExchangePublicParameters, org.bouncycastle.math.ec.ECAlgorithms, .ECFieldElement, .ECPoint, org.bouncycastle.util.Arrays, .Memoable, .Pack

SM2 Key Exchange protocol - based on https://tools.ietf.org/html/draft-shen-sm2-ecdsa-02

Field Summary

Modifier and Type	Field and Description
private final Digest	digest
private ECDomainParameters	ecParams
private ECPrivateKeyParameters	ephemeralKey
private ECPoint	ephemeralPubPoint
private boolean	initiator
private ECPrivateKeyParameters	staticKey
private ECPoint	staticPubPoint
private byte[]	userID
private int	w

Constructor Summary

Access	Constructor and Description
public	SM2KeyExchange()
public	SM2KeyExchange(Digest digest)

Method Summary

Modifier and Type	Method and Description
private void	addFieldElement(Digest digest, ECFieldElement v)
private void	addUserID(Digest digest, byte[] userID)
private byte[]	calculateInnerHash(Digest digest, ECPoint u, byte[] za, byte[] zb, ECPoint p1, ECPoint p2)
public byte[]	calculateKey(int kLen, CipherParameters pubParam)
public byte[][]	calculateKeyWithConfirmation(int kLen, byte[] confirmationTag, CipherParameters pubParam)
private ECPoint	calculateU(SM2KeyExchangePublicParameters otherPub)
private byte[]	digestDoFinal()
private byte[]	getZ(Digest digest, byte[] userID, ECPoint pubPoint)
public void	init(CipherParameters privParam)
private byte[]	kdf(ECPoint u, byte[] za, byte[] zb, int klen)
private BigInteger	reduce(BigInteger x)
private byte[]	S1(Digest digest, ECPoint u, byte[] inner)
private byte[]	S2(Digest digest, ECPoint u, byte[] inner)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

digest	back to summary
private final Digest digest

ecParams	back to summary
private ECDomainParameters ecParams

ephemeralKey	back to summary
private ECPrivateKeyParameters ephemeralKey

ephemeralPubPoint	back to summary
private ECPoint ephemeralPubPoint

initiator	back to summary
private boolean initiator

staticKey	back to summary
private ECPrivateKeyParameters staticKey

staticPubPoint	back to summary
private ECPoint staticPubPoint

userID	back to summary
private byte[] userID

w	back to summary
private int w

Constructor Detail

SM2KeyExchange	back to summary
public SM2KeyExchange()

SM2KeyExchange	back to summary
public SM2KeyExchange(Digest digest)

Method Detail

addFieldElement	back to summary
private void addFieldElement(Digest digest, ECFieldElement v)

addUserID	back to summary
private void addUserID(Digest digest, byte[] userID)

calculateInnerHash	back to summary
private byte[] calculateInnerHash(Digest digest, ECPoint u, byte[] za, byte[] zb, ECPoint p1, ECPoint p2)

calculateKey	back to summary
public byte[] calculateKey(int kLen, CipherParameters pubParam)

calculateKeyWithConfirmation	back to summary
public byte[][] calculateKeyWithConfirmation(int kLen, byte[] confirmationTag, CipherParameters pubParam)

calculateU	back to summary
private ECPoint calculateU(SM2KeyExchangePublicParameters otherPub)

digestDoFinal	back to summary
private byte[] digestDoFinal()

getZ	back to summary
private byte[] getZ(Digest digest, byte[] userID, ECPoint pubPoint)

init	back to summary
public void init(CipherParameters privParam)

kdf	back to summary
private byte[] kdf(ECPoint u, byte[] za, byte[] zb, int klen)

reduce	back to summary
private BigInteger reduce(BigInteger x)

S1	back to summary
private byte[] S1(Digest digest, ECPoint u, byte[] inner)

S2	back to summary
private byte[] S2(Digest digest, ECPoint u, byte[] inner)