// Path: src/main/java/org/abstractj/kalium/encoders/Encoder.java
// public interface Encoder {
// 
//     public static final Charset CHARSET = Charset.forName("US-ASCII");
// 
//     public static final Hex HEX = new Hex();
//     public static final Raw RAW = new Raw();
// 
//     public byte[] decode(String data);
// 
//     public String encode(final byte[] data);
// }
// 
// Path: src/main/java/org/abstractj/kalium/NaCl.java
// public static Sodium sodium() {
//     Sodium sodium = SingletonHolder.SODIUM_INSTANCE;
//     checkVersion(sodium);
//     return sodium;
// }
// 
// Path: src/main/java/org/abstractj/kalium/crypto/Util.java
// public static void checkLength(byte[] data, int size) {
//     if (data == null || data.length != size)
//         throw new RuntimeException("Invalid size");
// }
// 
// Path: src/main/java/org/abstractj/kalium/crypto/Util.java
// public static boolean isValid(int status, String message) {
//     if (status != 0)
//         throw new RuntimeException(message);
//     return true;
// }
// 
// Path: src/main/java/org/abstractj/kalium/crypto/Util.java
// public static byte[] removeZeros(int n, byte[] message) {
//     return Arrays.copyOfRange(message, n, message.length);
// }


import org.abstractj.kalium.encoders.Encoder;
import static org.abstractj.kalium.NaCl.Sodium.CRYPTO_BOX_CURVE25519XSALSA20POLY1305_BOXZEROBYTES;
import static org.abstractj.kalium.NaCl.Sodium.CRYPTO_SECRETBOX_XSALSA20POLY1305_NONCEBYTES;
import static org.abstractj.kalium.NaCl.Sodium.CRYPTO_SECRETBOX_XSALSA20POLY1305_KEYBYTES;
import static org.abstractj.kalium.NaCl.Sodium.CRYPTO_BOX_CURVE25519XSALSA20POLY1305_ZEROBYTES;
import static org.abstractj.kalium.NaCl.sodium;
import static org.abstractj.kalium.crypto.Util.checkLength;
import static org.abstractj.kalium.crypto.Util.isValid;
import static org.abstractj.kalium.crypto.Util.removeZeros;
/**
 * Copyright 2013 Bruno Oliveira, and individual contributors
 *
 * 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 org.abstractj.kalium.crypto;



public class SecretBox {

    private byte[] key;

    public SecretBox(byte[] key) {
        this.key = key;
        checkLength(key, CRYPTO_SECRETBOX_XSALSA20POLY1305_KEYBYTES);
    }

    public SecretBox(String key, Encoder encoder) {
        this(encoder.decode(key));
    }

    public byte[] encrypt(byte[] nonce, byte[] message) {
        checkLength(nonce, CRYPTO_SECRETBOX_XSALSA20POLY1305_NONCEBYTES);
        byte[] msg = Util.prependZeros(CRYPTO_BOX_CURVE25519XSALSA20POLY1305_ZEROBYTES, message);
        byte[] ct = Util.zeros(msg.length);
        isValid(sodium().crypto_secretbox_xsalsa20poly1305(ct, msg, msg.length,
                nonce, key), "Encryption failed");
        return removeZeros(CRYPTO_BOX_CURVE25519XSALSA20POLY1305_BOXZEROBYTES, ct);
    }

    public byte[] decrypt(byte[] nonce, byte[] ciphertext) {
        checkLength(nonce, CRYPTO_SECRETBOX_XSALSA20POLY1305_NONCEBYTES);
        byte[] ct = Util.prependZeros(CRYPTO_BOX_CURVE25519XSALSA20POLY1305_BOXZEROBYTES, ciphertext);
        byte[] message = Util.zeros(ct.length);
        isValid(sodium().crypto_secretbox_xsalsa20poly1305_open(message, ct,
                ct.length, nonce, key), "Decryption failed. Ciphertext failed verification");
// Path: src/main/java/org/abstractj/kalium/encoders/Encoder.java
// public interface Encoder {
// 
//     public static final Charset CHARSET = Charset.forName("US-ASCII");
// 
//     public static final Hex HEX = new Hex();
//     public static final Raw RAW = new Raw();
// 
//     public byte[] decode(String data);
// 
//     public String encode(final byte[] data);
// }
// 
// Path: src/main/java/org/abstractj/kalium/NaCl.java
// public static Sodium sodium() {
//     Sodium sodium = SingletonHolder.SODIUM_INSTANCE;
//     checkVersion(sodium);
//     return sodium;
// }
// 
// Path: src/main/java/org/abstractj/kalium/crypto/Util.java
// public static void checkLength(byte[] data, int size) {
//     if (data == null || data.length != size)
//         throw new RuntimeException("Invalid size");
// }
// 
// Path: src/main/java/org/abstractj/kalium/crypto/Util.java
// public static boolean isValid(int status, String message) {
//     if (status != 0)
//         throw new RuntimeException(message);
//     return true;
// }
// 
// Path: src/main/java/org/abstractj/kalium/crypto/Util.java
// public static byte[] removeZeros(int n, byte[] message) {
//     return Arrays.copyOfRange(message, n, message.length);
// }


// Path: src/main/java/org/abstractj/kalium/crypto/SecretBox.java
import org.abstractj.kalium.encoders.Encoder;
import static org.abstractj.kalium.NaCl.Sodium.CRYPTO_BOX_CURVE25519XSALSA20POLY1305_BOXZEROBYTES;
import static org.abstractj.kalium.NaCl.Sodium.CRYPTO_SECRETBOX_XSALSA20POLY1305_NONCEBYTES;
import static org.abstractj.kalium.NaCl.Sodium.CRYPTO_SECRETBOX_XSALSA20POLY1305_KEYBYTES;
import static org.abstractj.kalium.NaCl.Sodium.CRYPTO_BOX_CURVE25519XSALSA20POLY1305_ZEROBYTES;
import static org.abstractj.kalium.NaCl.sodium;
import static org.abstractj.kalium.crypto.Util.checkLength;
import static org.abstractj.kalium.crypto.Util.isValid;
import static org.abstractj.kalium.crypto.Util.removeZeros;

/**
 * Copyright 2013 Bruno Oliveira, and individual contributors
 *
 * 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 org.abstractj.kalium.crypto;



public class SecretBox {

    private byte[] key;

    public SecretBox(byte[] key) {
        this.key = key;
        checkLength(key, CRYPTO_SECRETBOX_XSALSA20POLY1305_KEYBYTES);
    }

    public SecretBox(String key, Encoder encoder) {
        this(encoder.decode(key));
    }

    public byte[] encrypt(byte[] nonce, byte[] message) {
        checkLength(nonce, CRYPTO_SECRETBOX_XSALSA20POLY1305_NONCEBYTES);
        byte[] msg = Util.prependZeros(CRYPTO_BOX_CURVE25519XSALSA20POLY1305_ZEROBYTES, message);
        byte[] ct = Util.zeros(msg.length);
        isValid(sodium().crypto_secretbox_xsalsa20poly1305(ct, msg, msg.length,
                nonce, key), "Encryption failed");
        return removeZeros(CRYPTO_BOX_CURVE25519XSALSA20POLY1305_BOXZEROBYTES, ct);
    }

    public byte[] decrypt(byte[] nonce, byte[] ciphertext) {
        checkLength(nonce, CRYPTO_SECRETBOX_XSALSA20POLY1305_NONCEBYTES);
        byte[] ct = Util.prependZeros(CRYPTO_BOX_CURVE25519XSALSA20POLY1305_BOXZEROBYTES, ciphertext);
        byte[] message = Util.zeros(ct.length);
        isValid(sodium().crypto_secretbox_xsalsa20poly1305_open(message, ct,
                ct.length, nonce, key), "Decryption failed. Ciphertext failed verification");
        return removeZeros(CRYPTO_BOX_CURVE25519XSALSA20POLY1305_ZEROBYTES, message);