Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

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

public class Main {
    public static String encodeHmac(String key, String data) throws Exception {
        Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
        SecretKeySpec secret_key = new SecretKeySpec(key.getBytes(), "HmacSHA256");
        sha256_HMAC.init(secret_key);

        return bytesToHex(sha256_HMAC.doFinal(data.getBytes()));
    }

    public static String bytesToHex(byte[] bytes) {
        char[] hexArray = "0123456789ABCDEF".toCharArray();
        char[] hexChars = new char[bytes.length * 2];
        for (int j = 0; j < bytes.length; j++) {
            int v = bytes[j] & 0xFF;
            hexChars[j * 2] = hexArray[v >>> 4];
            hexChars[j * 2 + 1] = hexArray[v & 0x0F];
        }
        return new String(hexChars);
    }
}