CCEXDigest.java

package org.knowm.xchange.ccex.service;

import java.math.BigInteger;

import javax.crypto.Mac;

import org.knowm.xchange.service.BaseParamsDigest;

import si.mazi.rescu.RestInvocation;

public class CCEXDigest extends BaseParamsDigest {

	private CCEXDigest(String secretKey) {

		super(secretKey, HMAC_SHA_512);
	}

	public static CCEXDigest createInstance(String secretKeyBase64) {

		return secretKeyBase64 == null ? null : new CCEXDigest(secretKeyBase64);
	}

	@Override
	public String digestParams(RestInvocation restInvocation) {
		String invocationUrl = restInvocation.getInvocationUrl();
	    Mac mac = getMac();
	    mac.update(invocationUrl.getBytes());

	    return String.format("%0128x", new BigInteger(1, mac.doFinal()));
	}

}