// Path: src/main/java/org/abstractj/kalium/crypto/Random.java
// public class Random {
// 
//     private static final int DEFAULT_SIZE = 32;
// 
//     /**
//      * Generate random bytes
//      *
//      * @param n number or random bytes
//      * @return
//      */
//     public byte[] randomBytes(int n) {
//         byte[] buffer = new byte[n];
//         sodium().randombytes(buffer, n);
//         return buffer;
//     }
// 
//     public byte[] randomBytes() {
//         byte[] buffer = new byte[DEFAULT_SIZE];
//         sodium().randombytes(buffer, DEFAULT_SIZE);
//         return buffer;
//     }
// }
// 
// Path: src/main/java/org/abstractj/kalium/crypto/Util.java
// public class Util {
// 
//     private static final int DEFAULT_SIZE = 32;
// 
//     public static byte[] prependZeros(int n, byte[] message) {
//         byte[] result = new byte[n + message.length];
//         System.arraycopy(message, 0, result, n, message.length);
//         return result;
//     }
// 
//     public static byte[] removeZeros(int n, byte[] message) {
//         return Arrays.copyOfRange(message, n, message.length);
//     }
// 
//     public static void checkLength(byte[] data, int size) {
//         if (data == null || data.length != size)
//             throw new RuntimeException("Invalid size");
//     }
// 
//     public static byte[] zeros(int n) {
//         return new byte[n];
//     }
// 
//     public static boolean isValid(int status, String message) {
//         if (status != 0)
//             throw new RuntimeException(message);
//         return true;
//     }
// 
//     public static byte[] slice(byte[] buffer, int start, int end) {
//         return Arrays.copyOfRange(buffer, start, end);
//     }
// 
//     public static byte[] merge(byte[] signature, byte[] message) {
//         byte[] result = new byte[signature.length + message.length];
//         System.arraycopy(signature, 0, result, 0, signature.length);
//         System.arraycopy(message, 0, result, signature.length, message.length);
//         return result;
//     }
// }
// 
// 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[] slice(byte[] buffer, int start, int end) {
//     return Arrays.copyOfRange(buffer, start, end);
// }
// 
// Path: src/main/java/org/abstractj/kalium/crypto/Util.java
// public static byte[] zeros(int n) {
//     return new byte[n];
// }


import jnr.ffi.byref.LongLongByReference;
import org.abstractj.kalium.crypto.Random;
import org.abstractj.kalium.crypto.Util;
import org.abstractj.kalium.encoders.Encoder;
import static org.abstractj.kalium.NaCl.Sodium.CRYPTO_BOX_CURVE25519XSALSA20POLY1305_PUBLICKEYBYTES;
import static org.abstractj.kalium.NaCl.Sodium.CRYPTO_BOX_CURVE25519XSALSA20POLY1305_SECRETKEYBYTES;
import static org.abstractj.kalium.NaCl.Sodium.CRYPTO_SIGN_ED25519_BYTES;
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.slice;
import static org.abstractj.kalium.crypto.Util.zeros;
import static org.abstractj.kalium.encoders.Encoder.HEX;
/**
 * 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.keys;



public class SigningKey {

    private final byte[] seed;
    private final byte[] secretKey;
    private final VerifyKey verifyKey;

    public SigningKey(byte[] seed) {
        checkLength(seed, CRYPTO_BOX_CURVE25519XSALSA20POLY1305_SECRETKEYBYTES);
        this.seed = seed;
        this.secretKey = zeros(CRYPTO_BOX_CURVE25519XSALSA20POLY1305_SECRETKEYBYTES * 2);
        byte[] publicKey = zeros(CRYPTO_BOX_CURVE25519XSALSA20POLY1305_PUBLICKEYBYTES);
        isValid(sodium().crypto_sign_ed25519_seed_keypair(publicKey, secretKey, seed),
                "Failed to generate a key pair");

        this.verifyKey = new VerifyKey(publicKey);
    }

    public SigningKey() {
// Path: src/main/java/org/abstractj/kalium/crypto/Random.java
// public class Random {
// 
//     private static final int DEFAULT_SIZE = 32;
// 
//     /**
//      * Generate random bytes
//      *
//      * @param n number or random bytes
//      * @return
//      */
//     public byte[] randomBytes(int n) {
//         byte[] buffer = new byte[n];
//         sodium().randombytes(buffer, n);
//         return buffer;
//     }
// 
//     public byte[] randomBytes() {
//         byte[] buffer = new byte[DEFAULT_SIZE];
//         sodium().randombytes(buffer, DEFAULT_SIZE);
//         return buffer;
//     }
// }
// 
// Path: src/main/java/org/abstractj/kalium/crypto/Util.java
// public class Util {
// 
//     private static final int DEFAULT_SIZE = 32;
// 
//     public static byte[] prependZeros(int n, byte[] message) {
//         byte[] result = new byte[n + message.length];
//         System.arraycopy(message, 0, result, n, message.length);
//         return result;
//     }
// 
//     public static byte[] removeZeros(int n, byte[] message) {
//         return Arrays.copyOfRange(message, n, message.length);
//     }
// 
//     public static void checkLength(byte[] data, int size) {
//         if (data == null || data.length != size)
//             throw new RuntimeException("Invalid size");
//     }
// 
//     public static byte[] zeros(int n) {
//         return new byte[n];
//     }
// 
//     public static boolean isValid(int status, String message) {
//         if (status != 0)
//             throw new RuntimeException(message);
//         return true;
//     }
// 
//     public static byte[] slice(byte[] buffer, int start, int end) {
//         return Arrays.copyOfRange(buffer, start, end);
//     }
// 
//     public static byte[] merge(byte[] signature, byte[] message) {
//         byte[] result = new byte[signature.length + message.length];
//         System.arraycopy(signature, 0, result, 0, signature.length);
//         System.arraycopy(message, 0, result, signature.length, message.length);
//         return result;
//     }
// }
// 
// 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[] slice(byte[] buffer, int start, int end) {
//     return Arrays.copyOfRange(buffer, start, end);
// }
// 
// Path: src/main/java/org/abstractj/kalium/crypto/Util.java
// public static byte[] zeros(int n) {
//     return new byte[n];
// }


// Path: src/main/java/org/abstractj/kalium/keys/SigningKey.java
import jnr.ffi.byref.LongLongByReference;
import org.abstractj.kalium.crypto.Random;
import org.abstractj.kalium.crypto.Util;
import org.abstractj.kalium.encoders.Encoder;
import static org.abstractj.kalium.NaCl.Sodium.CRYPTO_BOX_CURVE25519XSALSA20POLY1305_PUBLICKEYBYTES;
import static org.abstractj.kalium.NaCl.Sodium.CRYPTO_BOX_CURVE25519XSALSA20POLY1305_SECRETKEYBYTES;
import static org.abstractj.kalium.NaCl.Sodium.CRYPTO_SIGN_ED25519_BYTES;
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.slice;
import static org.abstractj.kalium.crypto.Util.zeros;
import static org.abstractj.kalium.encoders.Encoder.HEX;

/**
 * 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.keys;



public class SigningKey {

    private final byte[] seed;
    private final byte[] secretKey;
    private final VerifyKey verifyKey;

    public SigningKey(byte[] seed) {
        checkLength(seed, CRYPTO_BOX_CURVE25519XSALSA20POLY1305_SECRETKEYBYTES);
        this.seed = seed;
        this.secretKey = zeros(CRYPTO_BOX_CURVE25519XSALSA20POLY1305_SECRETKEYBYTES * 2);
        byte[] publicKey = zeros(CRYPTO_BOX_CURVE25519XSALSA20POLY1305_PUBLICKEYBYTES);
        isValid(sodium().crypto_sign_ed25519_seed_keypair(publicKey, secretKey, seed),
                "Failed to generate a key pair");

        this.verifyKey = new VerifyKey(publicKey);
    }

    public SigningKey() {
        this(new Random().randomBytes(CRYPTO_BOX_CURVE25519XSALSA20POLY1305_SECRETKEYBYTES));