namespace assetBundleUtility
{


	using System.Collections.Generic;
	using System.IO;
	using System.Security.Cryptography;
	using System.Text;
	
	public class MD5Utility
	{
	    public static byte[] GetMD5(string str)
	    {
	        byte[] bytes = Encoding.UTF8.GetBytes(str);
	        MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
	        byte[] md5Bytes = md5.ComputeHash(bytes);
	        return md5Bytes;
	    }
	
	    public static byte[] GetMD5(FileStream fileStream)
	    {
	        MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
	        byte[] md5Bytes = md5.ComputeHash(fileStream);
	        return md5Bytes;
	    }
	
	    public static string BytesToString(byte[] bytes)
	    {
	        StringBuilder stringBuilder = new StringBuilder();
	        foreach (var md5Byte in bytes)
	        {
	            stringBuilder.Append(md5Byte.ToString("X2")); //X2表示转为大写
	        }
	        return stringBuilder.ToString();
	    }
	
	    public static List<string> GetAllMD5StringFromPath(List<string> pathes)
	    {
	        List<string> md5Strings = new List<string>();
	        for (int i = 0; i < pathes.Count; i++)
	        {
	            string md5String = GetMD5StringFromPath(pathes[i]);
	            md5Strings.Add(md5String);
	        }
	        return md5Strings;
	    }
	
	    public static string GetMD5StringFromPath(string path)
	    {
	        FileStream fileStream = new FileStream(path, FileMode.Open);
	        byte[] bytes = GetMD5(fileStream);
	        string md5Strings = BytesToString(bytes);
	        fileStream.Close();
	        return md5Strings;
	    }
	}


}