Rijndael加密 - 只有字符串的一部分被解密 [英] rijndael encryption - only part of the string is decrypted

问题描述

只有字符串的一部分是越来越解密，我认为这与我的编码做

下面是发生了什么：

 字符串s =棕色狐狸跳过了绿蛙; 
线K =urieurut; 
串ENC = EncryptString（S，K）; 
串DEC = DecryptString（ENC，K）; 
  

结果是这样的：棕色狐狸juϼ㴘裴혽Ή⪻ㆉ - [Rth≸摹⟤een蛙

 公共静态字符串EncryptString（字符串stringToEncrypt，串的encryptionKey）
 {
字符串加密=的String.Empty; 
 
 UnicodeEncoding UE =新UnicodeEncoding（）; 
的byte []键= UE.GetBytes（的encryptionKey）; 
 
 RijndaelManaged的RMCrypto =新RijndaelManaged的（）; 
的MemoryStream毫秒​​=新的MemoryStream（）; 
 CryptoStream的CS =新的CryptoStream（MS，RMCrypto.CreateEncryptor（键，键），CryptoStreamMode.Write）; 
 
字节[] = encryptedString UE.GetBytes（stringToEncrypt）; 
 cs.Write（encryptedString，0，encryptedString.Length）; 
 cs.FlushFinalBlock（）; 
 cs.Close（）; 
 
加密= UE.GetString（ms.ToArray（））; 
返回加密; 
} 
 
公共静态字符串DecryptString（字符串stringToDecrypt，串的encryptionKey）
 {解密=的String.Empty 
串; 
 
 UnicodeEncoding UE =新UnicodeEncoding（）; 
的byte []键= UE.GetBytes（的encryptionKey）; 
字节[]数据= UE.GetBytes（stringToDecrypt）; 
 
 RijndaelManaged的RMCrypto =新RijndaelManaged的（）; 
的MemoryStream毫秒​​=新的MemoryStream（）; 
 CryptoStream的CS =新的CryptoStream（MS，RMCrypto.CreateDecryptor（键，键），CryptoStreamMode.Write）; 
 cs.Write（数据，0，data.Length）; 
 cs.FlushFinalBlock（）; 
 cs.Close（）; 
 
解密= UE.GetString（ms.ToArray（））; 
 
返回解密; 
} 
  

解决方案

我解决我的问题，通过使用对于加密的base64字符串 - 我可以看看其他的选择，但我只需要这些方法对数据量小，这里是最终的代码：

 公共静态字符串EncryptString（字符串stringToEncrypt，串的encryptionKey）
 {加密=的String.Empty 
串; 
的byte []键= Encoding.Unicode.GetBytes（的encryptionKey）; 
 
 RijndaelManaged的RMCrypto =新RijndaelManaged的（）; 
 RMCrypto.Padding = PaddingMode.PKCS7; 
的MemoryStream毫秒​​=新的MemoryStream（）; 
 CryptoStream的CS =新的CryptoStream（MS，RMCrypto.CreateEncryptor（键，键），CryptoStreamMode.Write）; 
 
字节[] = encryptedString Encoding.ASCII.GetBytes（stringToEncrypt）; 
 cs.Write（encryptedString，0，encryptedString.Length）; 
 cs.FlushFinalBlock（）; 
 cs.Close（）; 
 
 //加密= Encoding.ASCII.GetString（ms.ToArray（））; 
返回Convert.ToBase64String（ms.ToArray（））; 
} 
 
公共静态字符串DecryptString（字符串stringToDecrypt，串的encryptionKey）
 {解密=的String.Empty 
串; 
的byte []键= Encoding.Unicode.GetBytes（的encryptionKey）; 
字节[]数据= Convert.FromBase64String（stringToDecrypt）; 
 
 RijndaelManaged的RMCrypto =新RijndaelManaged的（）; 
 RMCrypto.Padding = PaddingMode.PKCS7; 
的MemoryStream毫秒​​=新的MemoryStream（）; 
 CryptoStream的CS =新的CryptoStream（MS，RMCrypto.CreateDecryptor（键，键），CryptoStreamMode.Write）; 
 cs.Write（数据，0，data.Length）; 
 cs.FlushFinalBlock（）; 
 cs.Close（）; 
 
解密= Encoding.ASCII.GetString（ms.ToArray（））; 
 
返回解密; 
} 
  

Only part of the string is getting decrypted, i think it has to do with my encoding.

Here is what happens:

        string s = "The brown fox jumped over the green frog";
        string k = "urieurut";
        string enc = EncryptString(s, k);
        string dec = DecryptString(enc, k);

The RESULT is this: The brown fox juϼ㴘裴혽Ή⪻ㆉr th≸ g⟤een frog

public static string EncryptString(string stringToEncrypt, string encryptionKey)
{
    string encrypted = String.Empty;

    UnicodeEncoding UE = new UnicodeEncoding();
    byte[] key = UE.GetBytes(encryptionKey);

    RijndaelManaged RMCrypto = new RijndaelManaged();
    MemoryStream ms = new MemoryStream();
    CryptoStream cs = new CryptoStream(ms, RMCrypto.CreateEncryptor(key, key), CryptoStreamMode.Write);

    byte[] encryptedString = UE.GetBytes(stringToEncrypt);
    cs.Write(encryptedString, 0, encryptedString.Length);
    cs.FlushFinalBlock();
    cs.Close();

    encrypted = UE.GetString(ms.ToArray());
    return encrypted;
}

public static string DecryptString(string stringToDecrypt, string encryptionKey)
{
    string decrypted = String.Empty;

    UnicodeEncoding UE = new UnicodeEncoding();
    byte[] key = UE.GetBytes(encryptionKey);
    byte[] data = UE.GetBytes(stringToDecrypt);

    RijndaelManaged RMCrypto = new RijndaelManaged();
    MemoryStream ms = new MemoryStream();
    CryptoStream cs = new CryptoStream(ms, RMCrypto.CreateDecryptor(key, key), CryptoStreamMode.Write);
    cs.Write(data, 0, data.Length);
    cs.FlushFinalBlock();
    cs.Close();

    decrypted = UE.GetString(ms.ToArray());

    return decrypted;
}

解决方案

I solved my issue by using base64 string for the encryption - i may look at other options but i only needed these methods for a small amount of data, here is the final code:

public static string EncryptString(string stringToEncrypt, string encryptionKey)
{
    string encrypted = String.Empty;
    byte[] key = Encoding.Unicode.GetBytes(encryptionKey);

    RijndaelManaged RMCrypto = new RijndaelManaged();
    RMCrypto.Padding = PaddingMode.PKCS7;
    MemoryStream ms = new MemoryStream();
    CryptoStream cs = new CryptoStream(ms, RMCrypto.CreateEncryptor(key, key), CryptoStreamMode.Write);

    byte[] encryptedString = Encoding.ASCII.GetBytes(stringToEncrypt);
    cs.Write(encryptedString, 0, encryptedString.Length);
    cs.FlushFinalBlock();
    cs.Close();

    //encrypted = Encoding.ASCII.GetString(ms.ToArray());
    return Convert.ToBase64String(ms.ToArray());
}

public static string DecryptString(string stringToDecrypt, string encryptionKey)
{
    string decrypted = String.Empty;
    byte[] key = Encoding.Unicode.GetBytes(encryptionKey);
    byte[] data = Convert.FromBase64String(stringToDecrypt);

    RijndaelManaged RMCrypto = new RijndaelManaged();
    RMCrypto.Padding = PaddingMode.PKCS7;
    MemoryStream ms = new MemoryStream();
    CryptoStream cs = new CryptoStream(ms, RMCrypto.CreateDecryptor(key, key), CryptoStreamMode.Write);
    cs.Write(data, 0, data.Length);
    cs.FlushFinalBlock();
    cs.Close();

    decrypted = Encoding.ASCII.GetString(ms.ToArray());

    return decrypted;
}

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