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Java implementation for Binance API

There is a newer version: 1.0.6

package com.binance.api.client.security;

import org.apache.commons.codec.binary.Hex;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

/**
 * Utility class to sign messages using HMAC-SHA256.
 */
public class HmacSHA256Signer {

  /**
   * Sign the given message using the given secret.
   * @param message message to sign
   * @param secret secret key
   * @return a signed message
   */
  public static String sign(String message, String secret) {
    try {
      Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
      SecretKeySpec secretKeySpec = new SecretKeySpec(secret.getBytes(), "HmacSHA256");
      sha256_HMAC.init(secretKeySpec);
      return new String(Hex.encodeHex(sha256_HMAC.doFinal(message.getBytes())));
    } catch (Exception e) {
      throw new RuntimeException("Unable to sign message.", e);
    }
  }
}