Example usage for org.bouncycastle.crypto.params X25519PrivateKeyParameters X25519PrivateKeyParameters

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.params X25519PrivateKeyParameters X25519PrivateKeyParameters.

Prototype

public X25519PrivateKeyParameters(byte[] buf, int off) 

Source Link

Usage

From source file:com.distrimind.util.crypto.ASymmetricEncryptionType.java

License:Open Source License

static PrivateKey decodeNativePrivateKey(byte[] encodedKey, String algorithm, String algorithmType, boolean xdh)
        throws NoSuchAlgorithmException, InvalidKeySpecException {

    try {//from  w w  w  .  j  a va2 s .com
        if (algorithmType.contains("SPHINCS")) {
            Sphincs256KeyFactorySpi kf = new Sphincs256KeyFactorySpi();
            return kf.engineGeneratePrivate(new PKCS8EncodedKeySpec(encodedKey));
        } else if (algorithmType.contains("CURVE_25519")) {
            ECPrivateKeySpec ks = deserializePrivateKey(encodedKey, false);
            return KeyFactory.getInstance(algorithm).generatePrivate(ks);

        } else if (algorithmType.contains(ASymmetricAuthenticatedSignatureType.BC_Ed25519.getCurveName())) {
            if (xdh) {
                X25519PrivateKeyParameters pk = new X25519PrivateKeyParameters(encodedKey, 0);
                return constructorBCXDHPrivateKey.newInstance(pk);

            } else {
                Ed25519PrivateKeyParameters pk = new Ed25519PrivateKeyParameters(encodedKey, 0);
                return constructorBCEdDSAPrivateKey.newInstance(pk);
            }
        } else if (algorithmType.contains(ASymmetricAuthenticatedSignatureType.BC_Ed448.getCurveName())) {
            if (xdh) {
                X448PrivateKeyParameters pk = new X448PrivateKeyParameters(encodedKey, 0);
                return constructorBCXDHPrivateKey.newInstance(pk);

            } else {
                Ed448PrivateKeyParameters pk = new Ed448PrivateKeyParameters(encodedKey, 0);
                return constructorBCEdDSAPrivateKey.newInstance(pk);
            }
        }

        else {

            PKCS8EncodedKeySpec pkcsKeySpec = new PKCS8EncodedKeySpec(encodedKey);
            KeyFactory kf = KeyFactory.getInstance(algorithm);
            return kf.generatePrivate(pkcsKeySpec);
        }
    } catch (InvalidKeySpecException | InstantiationException | IllegalAccessException
            | InvocationTargetException e) {
        throw new InvalidKeySpecException(e);
    }
}

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