BouncyEllipticKeyPair.java
/*
* GordianKnot: Security Suite
* Copyright 2012-2026. Tony Washer
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy
* of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package io.github.tonywasher.joceanus.gordianknot.impl.bc;
import io.github.tonywasher.joceanus.gordianknot.api.agree.GordianAgreementSpec;
import io.github.tonywasher.joceanus.gordianknot.api.base.GordianException;
import io.github.tonywasher.joceanus.gordianknot.api.encrypt.GordianEncryptorSpec;
import io.github.tonywasher.joceanus.gordianknot.api.keypair.GordianElliptic;
import io.github.tonywasher.joceanus.gordianknot.api.keypair.GordianKeyPair;
import io.github.tonywasher.joceanus.gordianknot.api.keypair.GordianKeyPairSpec;
import io.github.tonywasher.joceanus.gordianknot.api.sign.GordianSignParams;
import io.github.tonywasher.joceanus.gordianknot.api.sign.GordianSignatureSpec;
import io.github.tonywasher.joceanus.gordianknot.impl.bc.BouncyKeyPair.BouncyPrivateKey;
import io.github.tonywasher.joceanus.gordianknot.impl.bc.BouncyKeyPair.BouncyPublicKey;
import io.github.tonywasher.joceanus.gordianknot.impl.bc.BouncySignature.BouncyDERCoder;
import io.github.tonywasher.joceanus.gordianknot.impl.bc.BouncySignature.BouncyDigestSignature;
import io.github.tonywasher.joceanus.gordianknot.impl.core.agree.GordianCoreAgreementFactory;
import io.github.tonywasher.joceanus.gordianknot.impl.core.base.GordianBaseFactory;
import io.github.tonywasher.joceanus.gordianknot.impl.core.encrypt.GordianCoreEncryptor;
import io.github.tonywasher.joceanus.gordianknot.impl.core.exc.GordianCryptoException;
import io.github.tonywasher.joceanus.gordianknot.impl.core.exc.GordianIOException;
import io.github.tonywasher.joceanus.gordianknot.impl.core.exc.GordianLogicException;
import io.github.tonywasher.joceanus.gordianknot.impl.core.keypair.GordianKeyPairValidity;
import io.github.tonywasher.joceanus.gordianknot.impl.ext.engines.GordianEllipticEncryptor;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
import org.bouncycastle.asn1.x9.ECNamedCurveTable;
import org.bouncycastle.asn1.x9.X9ECParameters;
import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
import org.bouncycastle.crypto.DSA;
import org.bouncycastle.crypto.DerivationFunction;
import org.bouncycastle.crypto.InvalidCipherTextException;
import org.bouncycastle.crypto.SecretWithEncapsulation;
import org.bouncycastle.crypto.agreement.ECDHCBasicAgreement;
import org.bouncycastle.crypto.agreement.ECDHCUnifiedAgreement;
import org.bouncycastle.crypto.agreement.ECMQVBasicAgreement;
import org.bouncycastle.crypto.generators.ECKeyPairGenerator;
import org.bouncycastle.crypto.kems.ECIESKEMExtractor;
import org.bouncycastle.crypto.kems.ECIESKEMGenerator;
import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
import org.bouncycastle.crypto.params.ECDHUPrivateParameters;
import org.bouncycastle.crypto.params.ECDHUPublicParameters;
import org.bouncycastle.crypto.params.ECKeyGenerationParameters;
import org.bouncycastle.crypto.params.ECNamedDomainParameters;
import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
import org.bouncycastle.crypto.params.ECPublicKeyParameters;
import org.bouncycastle.crypto.params.MQVPrivateParameters;
import org.bouncycastle.crypto.params.MQVPublicParameters;
import org.bouncycastle.crypto.params.ParametersWithRandom;
import org.bouncycastle.crypto.util.PrivateKeyFactory;
import org.bouncycastle.crypto.util.PrivateKeyInfoFactory;
import org.bouncycastle.crypto.util.PublicKeyFactory;
import org.bouncycastle.crypto.util.SubjectPublicKeyInfoFactory;
import org.bouncycastle.jcajce.provider.asymmetric.util.ECUtil;
import org.bouncycastle.util.BigIntegers;
import javax.security.auth.DestroyFailedException;
import java.io.IOException;
import java.math.BigInteger;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
/**
* EllipticCurve KeyPair classes.
*/
public final class BouncyEllipticKeyPair {
/**
* Private constructor.
*/
private BouncyEllipticKeyPair() {
}
/**
* Bouncy Elliptic PublicKey.
*/
public static class BouncyECPublicKey
extends BouncyPublicKey<ECPublicKeyParameters> {
/**
* Constructor.
*
* @param pKeySpec the keySpec
* @param pPublicKey the public key
*/
BouncyECPublicKey(final GordianKeyPairSpec pKeySpec,
final ECPublicKeyParameters pPublicKey) {
super(pKeySpec, pPublicKey);
}
@Override
protected boolean matchKey(final AsymmetricKeyParameter pThat) {
/* Access keys */
final ECPublicKeyParameters myThis = getPublicKey();
final ECPublicKeyParameters myThat = (ECPublicKeyParameters) pThat;
/* Compare keys */
return compareKeys(myThis, myThat);
}
/**
* Is the private key valid for this public key?
*
* @param pPrivate the private key
* @return true/false
*/
public boolean validPrivate(final BouncyECPrivateKey pPrivate) {
final ECPrivateKeyParameters myPrivate = pPrivate.getPrivateKey();
return getPublicKey().getParameters().equals(myPrivate.getParameters());
}
/**
* CompareKeys.
*
* @param pFirst the first key
* @param pSecond the second key
* @return true/false
*/
private static boolean compareKeys(final ECPublicKeyParameters pFirst,
final ECPublicKeyParameters pSecond) {
return pFirst.getQ().equals(pSecond.getQ())
&& pFirst.getParameters().equals(pSecond.getParameters());
}
}
/**
* Bouncy Elliptic PrivateKey.
*/
public static class BouncyECPrivateKey
extends BouncyPrivateKey<ECPrivateKeyParameters> {
/**
* Constructor.
*
* @param pKeySpec the keySpec
* @param pPrivateKey the private key
*/
BouncyECPrivateKey(final GordianKeyPairSpec pKeySpec,
final ECPrivateKeyParameters pPrivateKey) {
super(pKeySpec, pPrivateKey);
}
@Override
protected boolean matchKey(final AsymmetricKeyParameter pThat) {
/* Access keys */
final ECPrivateKeyParameters myThis = getPrivateKey();
final ECPrivateKeyParameters myThat = (ECPrivateKeyParameters) pThat;
/* Compare keys */
return compareKeys(myThis, myThat);
}
/**
* CompareKeys.
*
* @param pFirst the first key
* @param pSecond the second key
* @return true/false
*/
private static boolean compareKeys(final ECPrivateKeyParameters pFirst,
final ECPrivateKeyParameters pSecond) {
return pFirst.getD().equals(pSecond.getD())
&& pFirst.getParameters().equals(pSecond.getParameters());
}
}
/**
* BouncyCastle Elliptic KeyPair generator.
*/
public static class BouncyECKeyPairGenerator
extends BouncyKeyPairGenerator {
/**
* Generator.
*/
private final ECKeyPairGenerator theGenerator;
/**
* Constructor.
*
* @param pFactory the Security Factory
* @param pKeySpec the keySpec
* @throws GordianException on error
*/
BouncyECKeyPairGenerator(final GordianBaseFactory pFactory,
final GordianKeyPairSpec pKeySpec) throws GordianException {
/* Initialise underlying class */
super(pFactory, pKeySpec);
/* Create the generator */
theGenerator = newGenerator();
/* Lookup the parameters */
final GordianElliptic myElliptic = pKeySpec.getElliptic();
final String myCurve = myElliptic.getCurveName();
final X9ECParameters x9 = myElliptic.hasCustomCurve()
? ECUtil.getNamedCurveByName(myCurve)
: ECNamedCurveTable.getByName(myCurve);
if (x9 == null) {
throw new GordianLogicException("Invalid KeySpec - " + pKeySpec);
}
/* Initialise the generator */
final ASN1ObjectIdentifier myOid = ECUtil.getNamedCurveOid(myCurve);
final ECNamedDomainParameters myDomain = new ECNamedDomainParameters(myOid, x9.getCurve(), x9.getG(), x9.getN(), x9.getH(), x9.getSeed());
final ECKeyGenerationParameters myParams = new ECKeyGenerationParameters(myDomain, getRandom());
theGenerator.init(myParams);
}
/**
* Create the generator.
*
* @return the generator
*/
ECKeyPairGenerator newGenerator() {
return new ECKeyPairGenerator();
}
@Override
public BouncyKeyPair generateKeyPair() {
/* Generate and return the keyPair */
final AsymmetricCipherKeyPair myPair = theGenerator.generateKeyPair();
final BouncyECPublicKey myPublic = new BouncyECPublicKey(getKeySpec(), (ECPublicKeyParameters) myPair.getPublic());
final BouncyECPrivateKey myPrivate = new BouncyECPrivateKey(getKeySpec(), (ECPrivateKeyParameters) myPair.getPrivate());
return new BouncyKeyPair(myPublic, myPrivate);
}
@Override
public PKCS8EncodedKeySpec getPKCS8Encoding(final GordianKeyPair pKeyPair) throws GordianException {
/* Protect against exceptions */
try {
/* Check the keyPair type and keySpecs */
BouncyKeyPair.checkKeyPair(pKeyPair, getKeySpec());
/* build and return the encoding */
final BouncyECPrivateKey myPrivateKey = (BouncyECPrivateKey) getPrivateKey(pKeyPair);
final ECPrivateKeyParameters myParms = myPrivateKey.getPrivateKey();
final PrivateKeyInfo myInfo = PrivateKeyInfoFactory.createPrivateKeyInfo(myParms);
return new PKCS8EncodedKeySpec(myInfo.getEncoded());
} catch (IOException e) {
throw new GordianCryptoException(ERROR_PARSE, e);
}
}
@Override
public BouncyKeyPair deriveKeyPair(final X509EncodedKeySpec pPublicKey,
final PKCS8EncodedKeySpec pPrivateKey) throws GordianException {
/* Protect against exceptions */
try {
/* Check the keySpecs */
checkKeySpec(pPrivateKey);
/* derive keyPair */
final BouncyECPublicKey myPublic = derivePublicKey(pPublicKey);
final PrivateKeyInfo myInfo = PrivateKeyInfo.getInstance(pPrivateKey.getEncoded());
final ECPrivateKeyParameters myParms = (ECPrivateKeyParameters) PrivateKeyFactory.createKey(myInfo);
final BouncyECPrivateKey myPrivate = new BouncyECPrivateKey(getKeySpec(), myParms);
final BouncyKeyPair myPair = new BouncyKeyPair(myPublic, myPrivate);
/* Check that we have a matching pair */
GordianKeyPairValidity.checkValidity(getFactory(), myPair);
/* Return the keyPair */
return myPair;
} catch (IOException e) {
throw new GordianCryptoException(ERROR_PARSE, e);
}
}
@Override
public X509EncodedKeySpec getX509Encoding(final GordianKeyPair pKeyPair) throws GordianException {
/* Protect against exceptions */
try {
/* Check the keyPair type and keySpecs */
BouncyKeyPair.checkKeyPair(pKeyPair, getKeySpec());
/* build and return the encoding */
final BouncyECPublicKey myPublicKey = (BouncyECPublicKey) getPublicKey(pKeyPair);
final ECPublicKeyParameters myParms = myPublicKey.getPublicKey();
final SubjectPublicKeyInfo myInfo = SubjectPublicKeyInfoFactory.createSubjectPublicKeyInfo(myParms);
return new X509EncodedKeySpec(myInfo.getEncoded());
} catch (IOException e) {
throw new GordianCryptoException(ERROR_PARSE, e);
}
}
@Override
public BouncyKeyPair derivePublicOnlyKeyPair(final X509EncodedKeySpec pEncodedKey) throws GordianException {
final BouncyECPublicKey myPublic = derivePublicKey(pEncodedKey);
return new BouncyKeyPair(myPublic);
}
/**
* Derive public key from encoded.
*
* @param pEncodedKey the encoded key
* @return the public key
* @throws GordianException on error
*/
private BouncyECPublicKey derivePublicKey(final X509EncodedKeySpec pEncodedKey) throws GordianException {
/* Protect against exceptions */
try {
/* Check the keySpecs */
checkKeySpec(pEncodedKey);
/* derive publicKey */
final SubjectPublicKeyInfo myInfo = SubjectPublicKeyInfo.getInstance(pEncodedKey.getEncoded());
final ECPublicKeyParameters myParms = (ECPublicKeyParameters) PublicKeyFactory.createKey(myInfo);
return new BouncyECPublicKey(getKeySpec(), myParms);
} catch (IOException e) {
throw new GordianCryptoException(ERROR_PARSE, e);
}
}
}
/**
* EC signer.
*/
public static class BouncyECSignature
extends BouncyDigestSignature {
/**
* The Signer.
*/
private final DSA theSigner;
/**
* The Coder.
*/
private final BouncyDERCoder theCoder;
/**
* Constructor.
*
* @param pFactory the factory
* @param pSpec the signatureSpec.
* @throws GordianException on error
*/
BouncyECSignature(final GordianBaseFactory pFactory,
final GordianSignatureSpec pSpec) throws GordianException {
/* Initialise underlying class */
super(pFactory, pSpec);
/* Create the signer and Coder */
theSigner = BouncySignature.getDSASigner(pFactory, pSpec);
theCoder = new BouncyDERCoder();
}
@Override
public void initForSigning(final GordianSignParams pParams) throws GordianException {
/* Initialise detail */
super.initForSigning(pParams);
final BouncyKeyPair myPair = getKeyPair();
BouncyKeyPair.checkKeyPair(myPair);
/* Initialise and set the signer */
final BouncyECPrivateKey myPrivate = (BouncyECPrivateKey) myPair.getPrivateKey();
final ParametersWithRandom myParms = new ParametersWithRandom(myPrivate.getPrivateKey(), getRandom());
theSigner.init(true, myParms);
}
@Override
public void initForVerify(final GordianSignParams pParams) throws GordianException {
/* Initialise detail */
super.initForVerify(pParams);
final BouncyKeyPair myPair = getKeyPair();
BouncyKeyPair.checkKeyPair(myPair);
/* Initialise and set the signer */
final BouncyECPublicKey myPublic = (BouncyECPublicKey) myPair.getPublicKey();
theSigner.init(false, myPublic.getPublicKey());
}
@Override
public byte[] sign() throws GordianException {
/* Check that we are in signing mode */
checkMode(GordianSignatureMode.SIGN);
/* Sign the message */
final BigInteger[] myValues = theSigner.generateSignature(getDigest());
return theCoder.dsaEncode(myValues[0], myValues[1]);
}
@Override
public boolean verify(final byte[] pSignature) throws GordianException {
/* Check that we are in verify mode */
checkMode(GordianSignatureMode.VERIFY);
/* Verify the message */
final BigInteger[] myValues = theCoder.dsaDecode(pSignature);
return theSigner.verifySignature(getDigest(), myValues[0], myValues[1]);
}
}
/**
* EC Agreement Engine.
*/
public static class BouncyECIESAgreementEngine
extends BouncyAgreementBase {
/**
* Key Length.
*/
private static final int KEYLEN = 32;
/**
* Derivation function.
*/
private final DerivationFunction theDerivation;
/**
* Constructor.
*
* @param pFactory the security factory
* @param pSpec the agreementSpec
* @throws GordianException on error
*/
BouncyECIESAgreementEngine(final GordianCoreAgreementFactory pFactory,
final GordianAgreementSpec pSpec) throws GordianException {
/* Initialize underlying class */
super(pFactory, pSpec);
/* Initialise the derivation function */
theDerivation = newDerivationFunction();
}
@Override
public void buildClientHello() throws GordianException {
/* Protect against exceptions */
try {
/* Create encapsulation */
final BouncyECPublicKey myPublic = (BouncyECPublicKey) getPublicKey(getServerKeyPair());
final ECIESKEMGenerator myGenerator = new ECIESKEMGenerator(KEYLEN, theDerivation, getRandom());
final SecretWithEncapsulation myResult = myGenerator.generateEncapsulated(myPublic.getPublicKey());
/* Store the encapsulation */
setEncapsulated(myResult.getEncapsulation());
/* Store secret and create initVector */
storeSecret(myResult.getSecret());
myResult.destroy();
} catch (DestroyFailedException e) {
throw new GordianIOException("Failed to destroy secret", e);
}
}
@Override
public void processClientHello() throws GordianException {
/* Create encapsulation */
final BouncyECPrivateKey myPrivate = (BouncyECPrivateKey) getPrivateKey(getServerKeyPair());
final ECIESKEMExtractor myExtractor = new ECIESKEMExtractor(myPrivate.getPrivateKey(), KEYLEN, theDerivation);
/* Parse encapsulated message and store secret */
final byte[] myMessage = getEncapsulated();
storeSecret(myExtractor.extractSecret(myMessage));
}
}
/**
* EC Anonymous Agreement Engine.
*/
public static class BouncyECAnonAgreementEngine
extends BouncyAgreementBase {
/**
* The agreement.
*/
private final ECDHCBasicAgreement theAgreement;
/**
* Constructor.
*
* @param pFactory the security factory
* @param pSpec the agreementSpec
* @throws GordianException on error
*/
BouncyECAnonAgreementEngine(final GordianCoreAgreementFactory pFactory,
final GordianAgreementSpec pSpec) throws GordianException {
/* Initialize underlying class */
super(pFactory, pSpec);
/* Create the agreement */
theAgreement = new ECDHCBasicAgreement();
}
@Override
public void buildClientHello() throws GordianException {
/* Access keys */
final BouncyECPublicKey myPublic = (BouncyECPublicKey) getPublicKey(getServerKeyPair());
final BouncyECPrivateKey myPrivate = (BouncyECPrivateKey) getPrivateKey(getClientEphemeral());
/* Derive the secret */
theAgreement.init(myPrivate.getPrivateKey());
final BigInteger mySecretInt = theAgreement.calculateAgreement(myPublic.getPublicKey());
final byte[] mySecret = BigIntegers.asUnsignedByteArray(theAgreement.getFieldSize(), mySecretInt);
/* Store secret */
storeSecret(mySecret);
}
@Override
public void processClientHello() throws GordianException {
/* Access keys */
final BouncyECPublicKey myPublic = (BouncyECPublicKey) getPublicKey(getClientEphemeral());
final BouncyECPrivateKey myPrivate = (BouncyECPrivateKey) getPrivateKey(getServerKeyPair());
/* Derive the secret */
theAgreement.init(myPrivate.getPrivateKey());
final BigInteger mySecretInt = theAgreement.calculateAgreement(myPublic.getPublicKey());
final byte[] mySecret = BigIntegers.asUnsignedByteArray(theAgreement.getFieldSize(), mySecretInt);
/* Store secret */
storeSecret(mySecret);
}
}
/**
* EC Basic Agreement Engine.
*/
public static class BouncyECBasicAgreementEngine
extends BouncyAgreementBase {
/**
* The agreement.
*/
private final ECDHCBasicAgreement theAgreement;
/**
* Constructor.
*
* @param pFactory the security factory
* @param pSpec the agreementSpec
* @throws GordianException on error
*/
BouncyECBasicAgreementEngine(final GordianCoreAgreementFactory pFactory,
final GordianAgreementSpec pSpec) throws GordianException {
/* Initialize underlying class */
super(pFactory, pSpec);
/* Create the agreement */
theAgreement = new ECDHCBasicAgreement();
}
@Override
public void processClientHello() throws GordianException {
/* Access keys */
final BouncyECPublicKey myPublic = (BouncyECPublicKey) getPublicKey(getClientKeyPair());
final BouncyECPrivateKey myPrivate = (BouncyECPrivateKey) getPrivateKey(getServerKeyPair());
/* Derive the secret */
theAgreement.init(myPrivate.getPrivateKey());
final BigInteger mySecretInt = theAgreement.calculateAgreement(myPublic.getPublicKey());
final byte[] mySecret = BigIntegers.asUnsignedByteArray(theAgreement.getFieldSize(), mySecretInt);
/* Store secret */
storeSecret(mySecret);
}
@Override
public void processServerHello() throws GordianException {
/* Access keys */
final BouncyECPublicKey myPublic = (BouncyECPublicKey) getPublicKey(getServerKeyPair());
final BouncyECPrivateKey myPrivate = (BouncyECPrivateKey) getPrivateKey(getClientKeyPair());
/* Derive the secret */
theAgreement.init(myPrivate.getPrivateKey());
final BigInteger mySecretInt = theAgreement.calculateAgreement(myPublic.getPublicKey());
final byte[] mySecret = BigIntegers.asUnsignedByteArray(theAgreement.getFieldSize(), mySecretInt);
/* Store secret */
storeSecret(mySecret);
}
}
/**
* EC Unified Agreement Engine.
*/
public static class BouncyECUnifiedAgreementEngine
extends BouncyAgreementBase {
/**
* The agreement.
*/
private final ECDHCUnifiedAgreement theAgreement;
/**
* Constructor.
*
* @param pFactory the security factory
* @param pSpec the agreementSpec
* @throws GordianException on error
*/
BouncyECUnifiedAgreementEngine(final GordianCoreAgreementFactory pFactory,
final GordianAgreementSpec pSpec) throws GordianException {
/* Initialize underlying class */
super(pFactory, pSpec);
/* Create the agreement */
theAgreement = new ECDHCUnifiedAgreement();
}
@Override
public void processClientHello() throws GordianException {
/* Access keys */
final BouncyECPublicKey myClientPublic = (BouncyECPublicKey) getPublicKey(getClientKeyPair());
final BouncyECPublicKey myClientEphPublic = (BouncyECPublicKey) getPublicKey(getClientEphemeral());
final BouncyECPrivateKey myPrivate = (BouncyECPrivateKey) getPrivateKey(getServerKeyPair());
final BouncyECPublicKey myEphPublic = (BouncyECPublicKey) getPublicKey(getServerEphemeral());
final BouncyECPrivateKey myEphPrivate = (BouncyECPrivateKey) getPrivateKey(getServerEphemeral());
/* Derive the secret */
final ECDHUPrivateParameters myPrivParams
= new ECDHUPrivateParameters(myPrivate.getPrivateKey(), myEphPrivate.getPrivateKey(), myEphPublic.getPublicKey());
theAgreement.init(myPrivParams);
final ECDHUPublicParameters myPubParams
= new ECDHUPublicParameters(myClientPublic.getPublicKey(), myClientEphPublic.getPublicKey());
storeSecret(theAgreement.calculateAgreement(myPubParams));
}
@Override
public void processServerHello() throws GordianException {
/* Access keys */
final BouncyECPublicKey myServerPublic = (BouncyECPublicKey) getPublicKey(getServerKeyPair());
final BouncyECPublicKey myServerEphPublic = (BouncyECPublicKey) getPublicKey(getServerEphemeral());
final BouncyECPrivateKey myPrivate = (BouncyECPrivateKey) getPrivateKey(getClientKeyPair());
final BouncyECPublicKey myEphPublic = (BouncyECPublicKey) getPublicKey(getClientEphemeral());
final BouncyECPrivateKey myEphPrivate = (BouncyECPrivateKey) getPrivateKey(getClientEphemeral());
/* Derive the secret */
final ECDHUPrivateParameters myPrivParams
= new ECDHUPrivateParameters(myPrivate.getPrivateKey(), myEphPrivate.getPrivateKey(), myEphPublic.getPublicKey());
theAgreement.init(myPrivParams);
final ECDHUPublicParameters myPubParams
= new ECDHUPublicParameters(myServerPublic.getPublicKey(), myServerEphPublic.getPublicKey());
storeSecret(theAgreement.calculateAgreement(myPubParams));
}
}
/**
* EC MQV Agreement Engine.
*/
public static class BouncyECMQVAgreementEngine
extends BouncyAgreementBase {
/**
* The agreement.
*/
private final ECMQVBasicAgreement theAgreement;
/**
* Constructor.
*
* @param pFactory the security factory
* @param pSpec the agreementSpec
* @throws GordianException on error
*/
BouncyECMQVAgreementEngine(final GordianCoreAgreementFactory pFactory,
final GordianAgreementSpec pSpec) throws GordianException {
/* Initialize underlying class */
super(pFactory, pSpec);
/* Create the agreement */
theAgreement = new ECMQVBasicAgreement();
}
@Override
public void processClientHello() throws GordianException {
/* Access keys */
final BouncyECPublicKey myClientPublic = (BouncyECPublicKey) getPublicKey(getClientKeyPair());
final BouncyECPublicKey myClientEphPublic = (BouncyECPublicKey) getPublicKey(getClientEphemeral());
final BouncyECPrivateKey myPrivate = (BouncyECPrivateKey) getPrivateKey(getServerKeyPair());
final BouncyECPublicKey myEphPublic = (BouncyECPublicKey) getPublicKey(getServerEphemeral());
final BouncyECPrivateKey myEphPrivate = (BouncyECPrivateKey) getPrivateKey(getServerEphemeral());
/* Derive the secret */
final MQVPrivateParameters myPrivParams
= new MQVPrivateParameters(myPrivate.getPrivateKey(), myEphPrivate.getPrivateKey(), myEphPublic.getPublicKey());
theAgreement.init(myPrivParams);
final MQVPublicParameters myPubParams
= new MQVPublicParameters(myClientPublic.getPublicKey(), myClientEphPublic.getPublicKey());
storeSecret(BigIntegers.asUnsignedByteArray(theAgreement.getFieldSize(), theAgreement.calculateAgreement(myPubParams)));
}
@Override
public void processServerHello() throws GordianException {
/* Access keys */
final BouncyECPublicKey myServerPublic = (BouncyECPublicKey) getPublicKey(getServerKeyPair());
final BouncyECPublicKey myServerEphPublic = (BouncyECPublicKey) getPublicKey(getServerEphemeral());
final BouncyECPrivateKey myPrivate = (BouncyECPrivateKey) getPrivateKey(getClientKeyPair());
final BouncyECPublicKey myEphPublic = (BouncyECPublicKey) getPublicKey(getClientEphemeral());
final BouncyECPrivateKey myEphPrivate = (BouncyECPrivateKey) getPrivateKey(getClientEphemeral());
/* Derive the secret */
final MQVPrivateParameters myPrivParams
= new MQVPrivateParameters(myPrivate.getPrivateKey(), myEphPrivate.getPrivateKey(), myEphPublic.getPublicKey());
theAgreement.init(myPrivParams);
final MQVPublicParameters myPubParams
= new MQVPublicParameters(myServerPublic.getPublicKey(), myServerEphPublic.getPublicKey());
storeSecret(BigIntegers.asUnsignedByteArray(theAgreement.getFieldSize(), theAgreement.calculateAgreement(myPubParams)));
}
}
/**
* EC Encryptor.
*/
public static class BouncyECEncryptor
extends GordianCoreEncryptor {
/**
* The underlying encryptor.
*/
private final GordianEllipticEncryptor theEncryptor;
/**
* Constructor.
*
* @param pFactory the factory
* @param pSpec the encryptorSpec
*/
BouncyECEncryptor(final GordianBaseFactory pFactory,
final GordianEncryptorSpec pSpec) {
/* Initialise underlying cipher */
super(pFactory, pSpec);
theEncryptor = new GordianEllipticEncryptor();
}
@Override
protected BouncyPublicKey<?> getPublicKey() {
return (BouncyPublicKey<?>) super.getPublicKey();
}
@Override
protected BouncyPrivateKey<?> getPrivateKey() {
return (BouncyPrivateKey<?>) super.getPrivateKey();
}
@Override
public void initForEncrypt(final GordianKeyPair pKeyPair) throws GordianException {
/* Initialize underlying cipher */
BouncyKeyPair.checkKeyPair(pKeyPair);
super.initForEncrypt(pKeyPair);
/* Initialize for encryption */
final ECPublicKeyParameters myParms = (ECPublicKeyParameters) getPublicKey().getPublicKey();
theEncryptor.initForEncrypt(myParms, getRandom());
}
@Override
public void initForDecrypt(final GordianKeyPair pKeyPair) throws GordianException {
/* Initialize underlying cipher */
BouncyKeyPair.checkKeyPair(pKeyPair);
super.initForDecrypt(pKeyPair);
/* Initialize for decryption */
final ECPrivateKeyParameters myParms = (ECPrivateKeyParameters) getPrivateKey().getPrivateKey();
theEncryptor.initForDecrypt(myParms);
}
@Override
public byte[] encrypt(final byte[] pBytes) throws GordianException {
try {
/* Check that we are in encryption mode */
checkMode(GordianEncryptMode.ENCRYPT);
/* Encrypt the message */
return theEncryptor.encrypt(pBytes);
} catch (InvalidCipherTextException e) {
throw new GordianCryptoException("Failed to process data", e);
}
}
@Override
public byte[] decrypt(final byte[] pBytes) throws GordianException {
try {
/* Check that we are in decryption mode */
checkMode(GordianEncryptMode.DECRYPT);
/* Decrypt the message */
return theEncryptor.decrypt(pBytes);
} catch (InvalidCipherTextException e) {
throw new GordianCryptoException("Failed to process data", e);
}
}
}
}