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

public class EncryptUtils
{
#if UNITY_EDITOR
    [UnityEditor.MenuItem("Framework/加密key生成")]
    static private void GenRSAKey()
    {
        RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
        string publickey = rsa.ToXmlString(false);
        string privatekey = rsa.ToXmlString(true);
    }
#endif

    static public byte[] RSAEncrypt(string publickey, byte[] content)
    {
        RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
        byte[] cipherbytes;
        rsa.FromXmlString(publickey);
        cipherbytes = rsa.Encrypt(content, false);
        return cipherbytes;
    }

    static public byte[] RSADecrypt(string privatekey, byte[] content)
    {
        RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
        byte[] cipherbytes;
        rsa.FromXmlString(privatekey);
        cipherbytes = rsa.Decrypt(content, false);
        return cipherbytes;
    }

    public static byte[] DESEncrypt(byte[] data, string desrgbKey, string desrgbIV)
    {
        DESCryptoServiceProvider des = new DESCryptoServiceProvider();
        MemoryStream memoryStream = new MemoryStream();

        byte[] desrgbKeyBs = Encoding.UTF8.GetBytes(desrgbKey);
        byte[] desrgbIVBs = Encoding.UTF8.GetBytes(desrgbIV);

        CryptoStream cryptoStream = new CryptoStream(memoryStream, des.CreateEncryptor(desrgbKeyBs, desrgbIVBs), CryptoStreamMode.Write);
        cryptoStream.Write(data, 0, data.Length);
        cryptoStream.FlushFinalBlock();
        return memoryStream.ToArray();
    }

    public static byte[] DESDecrypt(byte[] data, string desrgbKey, string desrgbIV)
    {
        DESCryptoServiceProvider des = new DESCryptoServiceProvider();
        MemoryStream memoryStream = new MemoryStream();

        byte[] desrgbKeyBs = Encoding.UTF8.GetBytes(desrgbKey);
        byte[] desrgbIVBs = Encoding.UTF8.GetBytes(desrgbIV);

        CryptoStream cryptoStream = new CryptoStream(memoryStream, des.CreateDecryptor(desrgbKeyBs, desrgbIVBs), CryptoStreamMode.Write);
        cryptoStream.Write(data, 0, data.Length);
        cryptoStream.FlushFinalBlock();
        return memoryStream.ToArray();
    }

    public static byte[] AESEncrypt(byte[] data, string key)
    {
        RijndaelManaged aes256 = new RijndaelManaged();
        aes256.Key = Encoding.UTF8.GetBytes(key);
        aes256.Mode = CipherMode.ECB;
        aes256.Padding = PaddingMode.PKCS7;

        return aes256.CreateEncryptor().TransformFinalBlock(data, 0, data.Length);
    }

    public static byte[] AESDecrypt(byte[] data, string key)
    {
        RijndaelManaged aes256 = new RijndaelManaged();
        aes256.Key = Encoding.UTF8.GetBytes(key);
        aes256.Mode = CipherMode.ECB;
        aes256.Padding = PaddingMode.PKCS7;

        return aes256.CreateDecryptor().TransformFinalBlock(data, 0, data.Length);
    }

}