Example usage for org.bouncycastle.crypto.params Ed25519PublicKeyParameters Ed25519PublicKeyParameters

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.params Ed25519PublicKeyParameters Ed25519PublicKeyParameters.

Prototype

public Ed25519PublicKeyParameters(byte[] buf, int off) 

Source Link

Usage

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

License:Open Source License

static PublicKey decodeNativePublicKey(byte[] encodedKey, String algorithm, String algorithmType,
        @SuppressWarnings("unused") String curveName, boolean xdh)
        throws NoSuchAlgorithmException, InvalidKeySpecException {
    try {//from  w  w w. j a v a  2 s .  c om
        //byte[][] parts = Bits.separateEncodingsWithShortSizedTabs(encodedKey);

        if (algorithmType.contains("SPHINCS")) {
            Sphincs256KeyFactorySpi kf = new Sphincs256KeyFactorySpi();
            return kf.engineGeneratePublic(new X509EncodedKeySpec(encodedKey));
        } else if (algorithmType.contains("CURVE_25519")) {

            org.bouncycastle.jce.spec.ECPublicKeySpec ks = deserializePublicKey(encodedKey, false);
            return KeyFactory.getInstance(algorithm).generatePublic(ks);
        } else if (algorithmType.contains(ASymmetricAuthenticatedSignatureType.BC_Ed25519.getCurveName())) {
            if (xdh) {
                X25519PublicKeyParameters pk = new X25519PublicKeyParameters(encodedKey, 0);
                return constructorBCXDHPublicKey.newInstance(pk);
            } else {
                Ed25519PublicKeyParameters pk = new Ed25519PublicKeyParameters(encodedKey, 0);
                return constructorBCEdDSAPublicKey.newInstance(pk);
            }
        } else if (algorithmType.contains(ASymmetricAuthenticatedSignatureType.BC_Ed448.getCurveName())) {
            if (xdh) {
                X448PublicKeyParameters pk = new X448PublicKeyParameters(encodedKey, 0);
                return constructorBCXDHPublicKey.newInstance(pk);
            } else {
                Ed448PublicKeyParameters pk = new Ed448PublicKeyParameters(encodedKey, 0);
                return constructorBCEdDSAPublicKey.newInstance(pk);
            }
        }
        /*else if (algorithm.equalsIgnoreCase("ECDSA") && curveName!=null)
           {
        return getPubKeyFromCurve(encodedKey, curveName);
                
           }*/
        X509EncodedKeySpec pubKeySpec = new X509EncodedKeySpec(encodedKey);
        KeyFactory kf = KeyFactory.getInstance(algorithm);
        return kf.generatePublic(pubKeySpec);
    } catch (IllegalAccessException | InstantiationException | InvocationTargetException e) {
        throw new InvalidKeySpecException(e);
    }

}

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