41 lines
2.3 KiB
Java
41 lines
2.3 KiB
Java
package org.bouncycastle.jcajce.provider.asymmetric.elgamal;
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import java.security.InvalidKeyException;
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import java.security.PrivateKey;
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import java.security.PublicKey;
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import javax.crypto.interfaces.DHPrivateKey;
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import javax.crypto.interfaces.DHPublicKey;
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import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
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import org.bouncycastle.crypto.params.ElGamalParameters;
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import org.bouncycastle.crypto.params.ElGamalPrivateKeyParameters;
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import org.bouncycastle.crypto.params.ElGamalPublicKeyParameters;
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import org.bouncycastle.jce.interfaces.ElGamalPrivateKey;
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import org.bouncycastle.jce.interfaces.ElGamalPublicKey;
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/* loaded from: classes6.dex */
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public class ElGamalUtil {
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public static AsymmetricKeyParameter generatePublicKeyParameter(PublicKey publicKey) throws InvalidKeyException {
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if (publicKey instanceof ElGamalPublicKey) {
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ElGamalPublicKey elGamalPublicKey = (ElGamalPublicKey) publicKey;
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return new ElGamalPublicKeyParameters(elGamalPublicKey.getY(), new ElGamalParameters(elGamalPublicKey.getParameters().getP(), elGamalPublicKey.getParameters().getG()));
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}
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if (!(publicKey instanceof DHPublicKey)) {
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throw new InvalidKeyException("can't identify public key for El Gamal.");
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}
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DHPublicKey dHPublicKey = (DHPublicKey) publicKey;
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return new ElGamalPublicKeyParameters(dHPublicKey.getY(), new ElGamalParameters(dHPublicKey.getParams().getP(), dHPublicKey.getParams().getG()));
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}
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public static AsymmetricKeyParameter generatePrivateKeyParameter(PrivateKey privateKey) throws InvalidKeyException {
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if (privateKey instanceof ElGamalPrivateKey) {
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ElGamalPrivateKey elGamalPrivateKey = (ElGamalPrivateKey) privateKey;
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return new ElGamalPrivateKeyParameters(elGamalPrivateKey.getX(), new ElGamalParameters(elGamalPrivateKey.getParameters().getP(), elGamalPrivateKey.getParameters().getG()));
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}
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if (!(privateKey instanceof DHPrivateKey)) {
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throw new InvalidKeyException("can't identify private key for El Gamal.");
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}
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DHPrivateKey dHPrivateKey = (DHPrivateKey) privateKey;
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return new ElGamalPrivateKeyParameters(dHPrivateKey.getX(), new ElGamalParameters(dHPrivateKey.getParams().getP(), dHPrivateKey.getParams().getG()));
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}
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}
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