RijndaelManaged不能解密 [英] RijndaelManaged can not decrypt
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问题描述
代码可以在以下网址找到: http://pastebin.com/3Yg5bHra
The code can be found at: http://pastebin.com/3Yg5bHra
我的问题是,当我解密时,什么都没有返回。没有任何东西被解密。
My problem is, that when I decrypt then nothing gets returned at all. Nothing gets decrypted.
在第111-114行周围的地方出错。 cryptoStream(csDecrypt)为空,即使我将数据放入memorystream(msDecrypt)
It goes wrong somewhere around line 111-114. The cryptoStream (csDecrypt) is empty, eventhough I put data into the memorystream (msDecrypt)
编辑
Nudier想出了一个解决方案
EDIT Nudier came up with a solution
推荐答案
//Function for encrypting propose
static string SymmetricEncryption(string str, byte[] key, byte[] IV)
{
MemoryStream ms = new MemoryStream();
try
{
//---creates a new instance of the RijndaelManaged class---
RijndaelManaged RMCrypto = new RijndaelManaged();
//---creates a new instance of the CryptoStream class---
CryptoStream cryptStream =new CryptoStream(ms, RMCrypto.CreateEncryptor(key, IV),
CryptoStreamMode.Write);
StreamWriter sWriter = new StreamWriter(cryptStream);
//---encrypting the string---
sWriter.Write(str);
sWriter.Close();
cryptStream.Close();
//---return the encrypted data as a string---
return System.Convert.ToBase64String(ms.ToArray());
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
return (String.Empty);
}
}
//Function for Decrypting propose
static string SymmetricDecryption(string str, byte[] key, byte[] IV)
{
try
{
//---converts the encrypted string into a byte array---
byte[] b = System.Convert.FromBase64String(str);
//---converts the byte array into a memory stream for decryption---
MemoryStream ms = new MemoryStream(b);
//---creates a new instance of the RijndaelManaged class---
RijndaelManaged RMCrypto = new RijndaelManaged();
//---creates a new instance of the CryptoStream class---
CryptoStream cryptStream = new CryptoStream(ms, RMCrypto.CreateDecryptor(key, IV),
CryptoStreamMode.Read);
//---decrypting the stream---
StreamReader sReader = new StreamReader(cryptStream);
//---converts the decrypted stream into a string---
String s = sReader.ReadToEnd();
sReader.Close();
return s;
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
return String.Empty;
}
}
//Main function execute the functions
RijndaelManaged RMCrypto = new RijndaelManaged();
//---generate key---
RMCrypto.GenerateKey();
byte[] key = RMCrypto.Key;
Console.WriteLine("Key : " + System.Convert.ToBase64String(key));
//---generate IV---
RMCrypto.GenerateIV();
byte[] IV = RMCrypto.IV;
Console.WriteLine("IV : " + System.Convert.ToBase64String(IV));
//---encrypt the string---
string cipherText = SymmetricEncryption("This is a test string.", key, IV);
Console.WriteLine("Ciphertext: " + cipherText);
//---decrypt the string---
Console.WriteLine("Original string: " + SymmetricDecryption(cipherText, key, IV));
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