using System;
using System.Collections.Generic;
using System.Security.Cryptography;
using System.Text;

namespace Bowin.Common.Encoder.HmacSHA256
{
    public class HMACSHA256Encoder
    {
        public static string Encode(string key, string text)
        {
            string hash;
            Byte[] code = System.Text.Encoding.UTF8.GetBytes(key);
            using (HMACSHA256 hmac = new HMACSHA256(code))
            {
                Byte[] d = System.Text.Encoding.UTF8.GetBytes(text);
                Byte[] hmBytes = hmac.ComputeHash(d);
                hash = ToHexString(hmBytes);
            }
            return hash;
        }
        public static string ToHexString(byte[] array)
        {
            StringBuilder hex = new StringBuilder(array.Length * 2);
            foreach (byte b in array)
            {
                hex.AppendFormat("{0:x2}", b);
            }
            return hex.ToString();
        }
    }
}