Summary of encryption methods

Common encryption methods:

RSA encryption:

 public static byte[] RSAEncrypt(string xmlPublicKey, byte[] SourceBytes)
        {
    
    
            using (RSACryptoServiceProvider RSACryptography = new RSACryptoServiceProvider())
            {
    
    
                RSACryptography.FromXmlString(xmlPublicKey);

                int MaxBlockSize = RSACryptography.KeySize / 8 - 11;    //加密块最大长度限制

                if (SourceBytes.Length <= MaxBlockSize)
                    return RSACryptography.Encrypt(SourceBytes, false);

                using (MemoryStream PlaiStream = new MemoryStream(SourceBytes))
                using (MemoryStream CrypStream = new MemoryStream())
                {
    
    
                    Byte[] Buffer = new Byte[MaxBlockSize];
                    int BlockSize = PlaiStream.Read(Buffer, 0, MaxBlockSize);

                    while (BlockSize > 0)
                    {
    
    
                        Byte[] ToEncrypt = new Byte[BlockSize];
                        Array.Copy(Buffer, 0, ToEncrypt, 0, BlockSize);

                        Byte[] Cryptograph = RSACryptography.Encrypt(ToEncrypt, false);
                        CrypStream.Write(Cryptograph, 0, Cryptograph.Length);

                        BlockSize = PlaiStream.Read(Buffer, 0, MaxBlockSize);
                    }

                    return CrypStream.ToArray();
                }
            }
        }

RSA decryption:

   public static byte[] RSADecrypt(string xmlPrivateKey, byte[] EncryptedBytes)
        {
    
    

            using (RSACryptoServiceProvider RSACryptography = new RSACryptoServiceProvider())
            {
    
    
                RSACryptography.FromXmlString(xmlPrivateKey);


                int MaxBlockSize = RSACryptography.KeySize / 8;    //解密块最大长度限制

                if (EncryptedBytes.Length <= MaxBlockSize)
                    return RSACryptography.Decrypt(EncryptedBytes, false);

                using (MemoryStream CrypStream = new MemoryStream(EncryptedBytes))
                using (MemoryStream PlaiStream = new MemoryStream())
                {
    
    
                    Byte[] Buffer = new Byte[MaxBlockSize];
                    int BlockSize = CrypStream.Read(Buffer, 0, MaxBlockSize);

                    while (BlockSize > 0)
                    {
    
    
                        Byte[] ToDecrypt = new Byte[BlockSize];
                        Array.Copy(Buffer, 0, ToDecrypt, 0, BlockSize);

                        Byte[] Plaintext = RSACryptography.Decrypt(ToDecrypt, false);
                        PlaiStream.Write(Plaintext, 0, Plaintext.Length);

                        BlockSize = CrypStream.Read(Buffer, 0, MaxBlockSize);
                    }

                    return PlaiStream.ToArray();
                }
            }
        }