几天来，我一直在尝试了解 TripleDES 的加密/解密代码。而且我在google上看过很多代码，下面显示的代码就是其中之一。
static void Main(string[] args)
{
string original = "Here is some data to encrypt!";
TripleDESCryptoServiceProvider myTripleDES = new TripleDESCryptoServiceProvider();
byte[] encrypted = EncryptStringToBytes(original, myTripleDES.Key, myTripleDES.IV);
string encrypt = Convert.ToBase64String(encrypted);
string roundtrip = DecryptStringFromBytes(encrypted, myTripleDES.Key, myTripleDES.IV);
Console.WriteLine("encryted: {0}", encrypt);
Console.WriteLine("Round Trip: {0}", roundtrip);
Console.ReadLine();
}
static byte[] EncryptStringToBytes(string plainText, byte[] Key, byte[] IV)
{
byte[] encrypted;
using (TripleDESCryptoServiceProvider tdsAlg = new TripleDESCryptoServiceProvider())
{
tdsAlg.Key = Key;
tdsAlg.IV = IV;
ICryptoTransform encryptor = tdsAlg.CreateEncryptor(tdsAlg.Key, tdsAlg.IV);
using (MemoryStream msEncrypt = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
swEncrypt.Write(plainText);
}
encrypted = msEncrypt.ToArray();
}
}
}
return encrypted;
}
static string DecryptStringFromBytes(byte[] cipherText, byte[] Key, byte[] IV)
{
string plaintext = null;
using (TripleDESCryptoServiceProvider tdsAlg = new TripleDESCryptoServiceProvider())
{
tdsAlg.Key = Key;
tdsAlg.IV = IV;
ICryptoTransform decryptor = tdsAlg.CreateDecryptor(tdsAlg.Key, tdsAlg.IV);
using (MemoryStream msDecrypt = new MemoryStream(cipherText))
{
using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (StreamReader srDecrypt = new StreamReader(csDecrypt))
{
plaintext = srDecrypt.ReadToEnd();
}
}
}
}
return plaintext;
}
代码中没有错误。我工作正常。但奇怪的是，我注意到纯文本从未被编码过。没有类似Encoding.Unicode.GetBytes(plainText);或Encoding.UTF8.GetBytes(plainText);类似的线。所以，我的问题是，（在代码中）作为字符串的纯文本如何转换为加密字节？流中是否有任何工作？如果是这样，那么在哪里以及如何？据我了解，在将字符串转换为字节的流之间没有这样的线。那么，如果没有这种基本转换，整体代码是如何工作的呢？
更新：此代码真的是有效代码吗？