BouncySnovaKeyPair.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.base.GordianException;
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.BouncyDigestSignature;
import io.github.tonywasher.joceanus.gordianknot.impl.core.base.GordianBaseFactory;
import io.github.tonywasher.joceanus.gordianknot.impl.core.exc.GordianCryptoException;
import io.github.tonywasher.joceanus.gordianknot.impl.core.keypair.GordianKeyPairValidity;
import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
import org.bouncycastle.crypto.params.ParametersWithRandom;
import org.bouncycastle.pqc.crypto.snova.SnovaKeyGenerationParameters;
import org.bouncycastle.pqc.crypto.snova.SnovaKeyPairGenerator;
import org.bouncycastle.pqc.crypto.snova.SnovaParameters;
import org.bouncycastle.pqc.crypto.snova.SnovaPrivateKeyParameters;
import org.bouncycastle.pqc.crypto.snova.SnovaPublicKeyParameters;
import org.bouncycastle.pqc.crypto.snova.SnovaSigner;
import org.bouncycastle.pqc.crypto.util.PrivateKeyFactory;
import org.bouncycastle.pqc.crypto.util.PrivateKeyInfoFactory;
import org.bouncycastle.pqc.crypto.util.PublicKeyFactory;
import org.bouncycastle.pqc.crypto.util.SubjectPublicKeyInfoFactory;
import java.io.IOException;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.Arrays;
/**
* Snova KeyPair classes.
*/
public final class BouncySnovaKeyPair {
/**
* Private constructor.
*/
private BouncySnovaKeyPair() {
}
/**
* Bouncy Snova PublicKey.
*/
public static class BouncySnovaPublicKey
extends BouncyPublicKey<SnovaPublicKeyParameters> {
/**
* Constructor.
*
* @param pKeySpec the keySpec
* @param pPublicKey the public key
*/
BouncySnovaPublicKey(final GordianKeyPairSpec pKeySpec,
final SnovaPublicKeyParameters pPublicKey) {
super(pKeySpec, pPublicKey);
}
@Override
protected boolean matchKey(final AsymmetricKeyParameter pThat) {
/* Access keys */
final SnovaPublicKeyParameters myThis = getPublicKey();
final SnovaPublicKeyParameters myThat = (SnovaPublicKeyParameters) 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 SnovaPublicKeyParameters pFirst,
final SnovaPublicKeyParameters pSecond) {
return Arrays.equals(pFirst.getEncoded(), pSecond.getEncoded());
}
}
/**
* Bouncy Snova PrivateKey.
*/
public static class BouncySnovaPrivateKey
extends BouncyPrivateKey<SnovaPrivateKeyParameters> {
/**
* Constructor.
*
* @param pKeySpec the keySpec
* @param pPrivateKey the private key
*/
BouncySnovaPrivateKey(final GordianKeyPairSpec pKeySpec,
final SnovaPrivateKeyParameters pPrivateKey) {
super(pKeySpec, pPrivateKey);
}
@Override
protected boolean matchKey(final AsymmetricKeyParameter pThat) {
/* Access keys */
final SnovaPrivateKeyParameters myThis = getPrivateKey();
final SnovaPrivateKeyParameters myThat = (SnovaPrivateKeyParameters) 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 SnovaPrivateKeyParameters pFirst,
final SnovaPrivateKeyParameters pSecond) {
return Arrays.equals(pFirst.getEncoded(), pSecond.getEncoded());
}
}
/**
* BouncyCastle Snova KeyPair generator.
*/
public static class BouncySnovaKeyPairGenerator
extends BouncyKeyPairGenerator {
/**
* Generator.
*/
private final SnovaKeyPairGenerator theGenerator;
/**
* Constructor.
*
* @param pFactory the Security Factory
* @param pKeySpec the keySpec
*/
BouncySnovaKeyPairGenerator(final GordianBaseFactory pFactory,
final GordianKeyPairSpec pKeySpec) {
/* Initialise underlying class */
super(pFactory, pKeySpec);
/* Determine the parameters */
final SnovaParameters myParms = pKeySpec.getSnovaKeySpec().getParameters();
/* Create and initialise the generator */
theGenerator = new SnovaKeyPairGenerator();
final SnovaKeyGenerationParameters myParams = new SnovaKeyGenerationParameters(getRandom(), myParms);
theGenerator.init(myParams);
}
@Override
public BouncyKeyPair generateKeyPair() {
/* Generate and return the keyPair */
final AsymmetricCipherKeyPair myPair = theGenerator.generateKeyPair();
final BouncySnovaPublicKey myPublic = new BouncySnovaPublicKey(getKeySpec(), (SnovaPublicKeyParameters) myPair.getPublic());
final BouncySnovaPrivateKey myPrivate = new BouncySnovaPrivateKey(getKeySpec(), (SnovaPrivateKeyParameters) 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 BouncySnovaPrivateKey myPrivateKey = (BouncySnovaPrivateKey) getPrivateKey(pKeyPair);
final SnovaPrivateKeyParameters myParms = myPrivateKey.getPrivateKey();
final PrivateKeyInfo myInfo = PrivateKeyInfoFactory.createPrivateKeyInfo(myParms, null);
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 BouncySnovaPublicKey myPublic = derivePublicKey(pPublicKey);
final PrivateKeyInfo myInfo = PrivateKeyInfo.getInstance(pPrivateKey.getEncoded());
final SnovaPrivateKeyParameters myParms = (SnovaPrivateKeyParameters) PrivateKeyFactory.createKey(myInfo);
final BouncySnovaPrivateKey myPrivate = new BouncySnovaPrivateKey(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 BouncySnovaPublicKey myPublicKey = (BouncySnovaPublicKey) getPublicKey(pKeyPair);
final SnovaPublicKeyParameters 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 BouncySnovaPublicKey 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 BouncySnovaPublicKey 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 SnovaPublicKeyParameters myParms = (SnovaPublicKeyParameters) PublicKeyFactory.createKey(myInfo);
return new BouncySnovaPublicKey(getKeySpec(), myParms);
} catch (IOException e) {
throw new GordianCryptoException(ERROR_PARSE, e);
}
}
}
/**
* Snova signer.
*/
public static class BouncySnovaSignature
extends BouncyDigestSignature {
/**
* The Snova Signer.
*/
private final SnovaSigner theSigner;
/**
* Constructor.
*
* @param pFactory the factory
* @param pSpec the signatureSpec.
* @throws GordianException on error
*/
BouncySnovaSignature(final GordianBaseFactory pFactory,
final GordianSignatureSpec pSpec) throws GordianException {
/* Initialise underlying class */
super(pFactory, pSpec);
theSigner = new SnovaSigner();
}
@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 BouncySnovaPrivateKey myPrivate = (BouncySnovaPrivateKey) myPair.getPrivateKey();
final CipherParameters 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 BouncySnovaPublicKey myPublic = (BouncySnovaPublicKey) 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 */
return theSigner.generateSignature(getDigest());
}
@Override
public boolean verify(final byte[] pSignature) throws GordianException {
/* Check that we are in verify mode */
checkMode(GordianSignatureMode.VERIFY);
/* Verify the message */
return theSigner.verifySignature(getDigest(), pSignature);
}
}
}