回答

VRoid Hub上官网上的vrm都是经过算法加密的，破解代码如下：

using System;
using System.Security.Cryptography;
using System.IO;
using System.IO.Compression;
namespace Vroid
{
    class Vroiddec
    {
        static void Main(string[] args)
        {
        	using (FileStream fs = new FileStream(args[0],FileMode.Open)) {
        		using (BinaryReader bs = new BinaryReader(fs)) {
        			int buff_size=(int)(fs.Length)-48;
        			RijndaelManaged rDel=new RijndaelManaged();
        			rDel.IV=bs.ReadBytes(16);
        			rDel.Key=bs.ReadBytes(32);
        			rDel.Mode=CipherMode.CBC;
        			byte[] resultarray=rDel.CreateDecryptor().TransformFinalBlock(bs.ReadBytes(buff_size),0,buff_size);
        			using(MemoryStream ms =new MemoryStream(resultarray)){
	        			using(GZipStream gzs=new GZipStream(ms,CompressionMode.Decompress)){
	        				using(FileStream df=new FileStream(args[0]+".dec",FileMode.OpenOrCreate,FileAccess.Write))
	        				{
			        			int data;
			        			while((data=gzs.ReadByte())!=-1)
			        			{
			        				df.WriteByte((byte)data);
			        			}
	        				}
	        			}
        			}
				}
			}
            log_msg("Done!");
        }
		static void log_msg(string msg)
		{
			Console.WriteLine(msg);
		}
    }
}

1将上述代码在visual studio中新建一个控制台执行，并发布后执行命令就可将vrm文件破解。