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The ProximaX Sirius Chain Java SDK is a Java library for interacting with the Sirius Blockchain.

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/*
 * Copyright 2018 NEM
 *
 * 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.proximax.core.crypto;

/**
 * Interface for encryption and decryption of data.
 */
public interface BlockCipher {

    /**
     * Encrypts an arbitrarily-sized message.
     *
     * @param input The message to encrypt.
     * @return The encrypted message.
     */
    byte[] encrypt(final byte[] input);

    /**
     * Decrypts an arbitrarily-sized message.
     *
     * @param input The message to decrypt.
     * @return The decrypted message or null if decryption failed.
     */
    byte[] decrypt(final byte[] input);
}