ИСХОДНЫЕ ДАННЫЕ С КОДОМ ПРОГРАММ:
Сервер:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Net;
using System.Net.Sockets;
using System.Security.Cryptography;namespace Client
{
class Program
{
static void Main(string[] args)
{
TcpClient client = new TcpClient();
client.Connect("localhost", 5001);
NetworkStream stm = client.GetStream();
SymmetricAlgorithm des = new DESCryptoServiceProvider();
des.Key = Encoding.ASCII.GetBytes("12345678");
des.IV = Encoding.ASCII.GetBytes("12345678");
ICryptoTransform desencrypt = des.CreateEncryptor();
CryptoStream cryptostream = new CryptoStream(stm,desencrypt,CryptoStreamMode.Write);
byte[] readBuf = Encoding.Unicode.GetBytes(Console.ReadLine());
cryptostream.Write(readBuf, 0, readBuf.Length);
cryptostream.Close();
stm.Close();
}
}
}
Клиент:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using System.Net.Sockets;
using System.Security.Cryptography;namespace streamCrypto
{
class Program
{
static void Main(string[] args)
{
TcpListener listener = new TcpListener(5001);
listener.Start();
TcpClient tc = listener.AcceptTcpClient();
NetworkStream stm = tc.GetStream();
SymmetricAlgorithm des = new DESCryptoServiceProvider();
des.Key = Encoding.ASCII.GetBytes("12345678");
des.IV = Encoding.ASCII.GetBytes("12345678");
ICryptoTransform desdecrypt = des.CreateDecryptor();
CryptoStream cryptostream = new CryptoStream(stm, desdecrypt, CryptoStreamMode.Read);
byte[] readBuf = new byte[100];
cryptostream.Read(readBuf, 0, 100);
Console.WriteLine(Encoding.Unicode.GetString(readBuf));
cryptostream.Close();
stm.Close();
}
}
}
ВОПРОС:
Почему если в коде клиентской части убрать строчку:
cryptostream.Close();
получаем информацию об ошибке:
Необработанное исключение: System.Security.Cryptography.CryptographicException:
Плохие данные.в System.Security.Cryptography.CryptographicException.ThrowCryptogaphicExcept
ion(Int32 hr)
в System.Security.Cryptography.Utils._DecryptData(SafeKeyHandle hKey, Byte[]
data, Int32 ib, Int32 cb, Byte[]& outputBuffer, Int32 outputOffset, PaddingMode
PaddingMode, Boolean fDone)
в System.Security.Cryptography.CryptoAPITransform.TransformFinalBlock(Byte[]
inputBuffer, Int32 inputOffset, Int32 inputCount)
в System.Security.Cryptography.CryptoStream.Read(Byte[] buffer, Int32 offset,
Int32 count)
в streamCrypto.Program.Main(String[] args) в C:\LANDWATERSUN\TEMP\streamCrypt
o\streamCrypto\Program.cs:строка 26
?
