方便自己使用的MD5，可用在Unity

HashTools.cs

using System;
using System.Security.Cryptography;
using System.Text;

public class HashTools
{
	public static byte[] GenMD5(byte[] source)
	{
		MD5 md5 = new MD5CryptoServiceProvider();
		return md5.ComputeHash(source);
	}
	public static byte[] GenMD5(string source)
	{
		MD5 md5 = new MD5CryptoServiceProvider();
		return md5.ComputeHash(Encoding.UTF8.GetBytes(source));
	}
	public static string GenMD5String(byte[] source)
	{
		return GenHEX(GenMD5(source));
	}
	public static string GenMD5String(string source)
	{
		return GenHEX(GenMD5(source));
	}

	public static string GenHEX(byte[] source)
	{
		return BitConverter.ToString(source).Replace("-", "");
	}
	public static string GenHEX(byte[] source, bool replace)
	{
		if (replace)
		{
			return BitConverter.ToString(source).Replace("-", "");
		}
		else
		{
			return BitConverter.ToString(source);
		}
	}

	public static string GenBase64(byte[] source)
	{
		return Convert.ToBase64String(source);
	}
}