C# 如何在套接字编程中加密Rijndael编码的数据?
我正在研究rijndael和AES中的加密和解密。我有一个问题。我们应该如何在套接字编程中解密数据?我们应该如何在客户端和服务器程序中发送和使用KEY和IV。我在MSDN中读过这些代码,但在本例中,所有代码都在一个文件上运行,密钥和IV在同一个位置生成,但我不知道我们应该如何以安全的方式将密钥和IV传输到服务器…非常感谢 以下是MSDN示例:C# 如何在套接字编程中加密Rijndael编码的数据?,c#,sockets,rijndael,C#,Sockets,Rijndael,我正在研究rijndael和AES中的加密和解密。我有一个问题。我们应该如何在套接字编程中解密数据?我们应该如何在客户端和服务器程序中发送和使用KEY和IV。我在MSDN中读过这些代码,但在本例中,所有代码都在一个文件上运行,密钥和IV在同一个位置生成,但我不知道我们应该如何以安全的方式将密钥和IV传输到服务器…非常感谢 以下是MSDN示例: using System; using System.IO; using System.Security.Cryptography; namespace
using System;
using System.IO;
using System.Security.Cryptography;
namespace RijndaelManaged_Example
{
class RijndaelExample
{
public static void Main()
{
try
{
string original = "Here is some data to encrypt!";
// Create a new instance of the RijndaelManaged
// class. This generates a new key and initialization
// vector (IV).
using (RijndaelManaged myRijndael = new RijndaelManaged())
{
myRijndael.GenerateKey();
myRijndael.GenerateIV();
// Encrypt the string to an array of bytes.
byte[] encrypted = EncryptStringToBytes(original, myRijndael.Key, myRijndael.IV);
// Decrypt the bytes to a string.
string roundtrip = DecryptStringFromBytes(encrypted, myRijndael.Key, myRijndael.IV);
//Display the original data and the decrypted data.
Console.WriteLine("Original: {0}", original);
Console.WriteLine("Round Trip: {0}", roundtrip);
}
}
catch (Exception e)
{
Console.WriteLine("Error: {0}", e.Message);
}
}
static byte[] EncryptStringToBytes(string plainText, byte[] Key, byte[] IV)
{
// Check arguments.
if (plainText == null || plainText.Length <= 0)
throw new ArgumentNullException("plainText");
if (Key == null || Key.Length <= 0)
throw new ArgumentNullException("Key");
if (IV == null || IV.Length <= 0)
throw new ArgumentNullException("IV");
byte[] encrypted;
// Create an RijndaelManaged object
// with the specified key and IV.
using (RijndaelManaged rijAlg = new RijndaelManaged())
{
rijAlg.Key = Key;
rijAlg.IV = IV;
// Create a decrytor to perform the stream transform.
ICryptoTransform encryptor = rijAlg.CreateEncryptor(rijAlg.Key, rijAlg.IV);
// Create the streams used for encryption.
using (MemoryStream msEncrypt = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
//Write all data to the stream.
swEncrypt.Write(plainText);
}
encrypted = msEncrypt.ToArray();
}
}
}
// Return the encrypted bytes from the memory stream.
return encrypted;
}
static string DecryptStringFromBytes(byte[] cipherText, byte[] Key, byte[] IV)
{
// Check arguments.
if (cipherText == null || cipherText.Length <= 0)
throw new ArgumentNullException("cipherText");
if (Key == null || Key.Length <= 0)
throw new ArgumentNullException("Key");
if (IV == null || IV.Length <= 0)
throw new ArgumentNullException("IV");
// Declare the string used to hold
// the decrypted text.
string plaintext = null;
// Create an RijndaelManaged object
// with the specified key and IV.
using (RijndaelManaged rijAlg = new RijndaelManaged())
{
rijAlg.Key = Key;
rijAlg.IV = IV;
// Create a decrytor to perform the stream transform.
ICryptoTransform decryptor = rijAlg.CreateDecryptor(rijAlg.Key, rijAlg.IV);
// Create the streams used for decryption.
using (MemoryStream msDecrypt = new MemoryStream(cipherText))
{
using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (StreamReader srDecrypt = new StreamReader(csDecrypt))
{
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
plaintext = srDecrypt.ReadToEnd();
}
}
}
}
return plaintext;
}
}
}这并不是一个真正的答案,但对于实际共享共享秘密的隐藏复杂性,这是一篇非常有趣的文章:据我所知,您不需要隐藏IV,您应该为每次加密生成一个新的IV,然后将IV和加密消息发送到您的目的地。所以你只需要共享密钥。但是我建议你不要实现你自己的加密协议,原因如下@Corak:谢谢你的文章。@BoeseB:好的,那么你应该如何共享密钥呢?