connectbot/sshlib

package com.trilead.ssh2.crypto.keys;

import java.security.InvalidKeyException;
import java.security.Key;
import java.security.KeyFactorySpi;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;

public class Ed25519KeyFactory extends KeyFactorySpi {
    @Override
    protected PublicKey engineGeneratePublic(KeySpec keySpec) throws InvalidKeySpecException {
        if (keySpec instanceof X509EncodedKeySpec) {
            return new Ed25519PublicKey((X509EncodedKeySpec) keySpec);
        }
        throw new InvalidKeySpecException("Unrecognized key spec: " + keySpec.getClass());
    }

    @Override
    protected PrivateKey engineGeneratePrivate(KeySpec keySpec) throws InvalidKeySpecException {
        if (keySpec instanceof PKCS8EncodedKeySpec) {
            return new Ed25519PrivateKey((PKCS8EncodedKeySpec) keySpec);
        }
        throw new InvalidKeySpecException("Unrecognized key spec: " + keySpec.getClass());
    }

    @Override
    protected <T extends KeySpec> T engineGetKeySpec(Key key, Class<T> keySpec) throws InvalidKeySpecException {
        throw new InvalidKeySpecException("not implemented yet " + key + " " + keySpec);
    }

    @Override
    protected Key engineTranslateKey(Key key) throws InvalidKeyException {
        throw new InvalidKeyException("No other EdDSA key providers known");
    }
}