【发布时间】：2010-01-22 10:32:20
【问题描述】：
我知道有人对此提出了其他问题，但到目前为止还没有提供解决方案或正是我遇到的问题。
下面的类处理字符串的加解密，传入的key和vector总是一样的。
被加密和解密的字符串总是数字，大多数都可以，但偶尔会在解密时失败（但仅在生产服务器上）。我应该提到，本地和生产环境都在 Windows Server 2003 上的 IIS6 中，使用该类的代码位于 .ashx 处理程序中。在生产服务器上失败的例子是“0000232668”
错误信息是
System.Security.Cryptography.CryptographicException：填充无效且无法删除。 在 System.Security.Cryptography.RijndaelManagedTransform.DecryptData(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount, Byte[]& outputBuffer, Int32 outputOffset, PaddingMode paddingMode, Boolean fLast)
对于代码
public class Aes
{
private byte[] Key;
private byte[] Vector;
private ICryptoTransform EncryptorTransform, DecryptorTransform;
private System.Text.UTF8Encoding UTFEncoder;
public Aes(byte[] key, byte[] vector)
{
this.Key = key;
this.Vector = vector;
// our encyption method
RijndaelManaged rm = new RijndaelManaged();
rm.Padding = PaddingMode.PKCS7;
// create an encryptor and decyptor using encryption method. key and vector
EncryptorTransform = rm.CreateEncryptor(this.Key, this.Vector);
DecryptorTransform = rm.CreateDecryptor(this.Key, this.Vector);
// used to translate bytes to text and vice versa
UTFEncoder = new System.Text.UTF8Encoding();
}
/// Encrypt some text and return a string suitable for passing in a URL.
public string EncryptToString(string TextValue)
{
return ByteArrToString(Encrypt(TextValue));
}
/// Encrypt some text and return an encrypted byte array.
public byte[] Encrypt(string TextValue)
{
//Translates our text value into a byte array.
Byte[] bytes = UTFEncoder.GetBytes(TextValue);
Byte[] encrypted = null;
//Used to stream the data in and out of the CryptoStream.
using (MemoryStream memoryStream = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(memoryStream, EncryptorTransform, CryptoStreamMode.Write))
{
cs.Write(bytes, 0, bytes.Length);
}
encrypted = memoryStream.ToArray();
}
return encrypted;
}
/// The other side: Decryption methods
public string DecryptString(string EncryptedString)
{
return Decrypt(StrToByteArray(EncryptedString));
}
/// Decryption when working with byte arrays.
public string Decrypt(byte[] EncryptedValue)
{
Byte[] decryptedBytes = null;
using (MemoryStream encryptedStream = new MemoryStream())
{
using (CryptoStream decryptStream = new CryptoStream(encryptedStream, DecryptorTransform, CryptoStreamMode.Write))
{
decryptStream.Write(EncryptedValue, 0, EncryptedValue.Length);
}
decryptedBytes = encryptedStream.ToArray();
}
return UTFEncoder.GetString(decryptedBytes);
}
/// Convert a string to a byte array. NOTE: Normally we'd create a Byte Array from a string using an ASCII encoding (like so).
// System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
// return encoding.GetBytes(str);
// However, this results in character values that cannot be passed in a URL. So, instead, I just
// lay out all of the byte values in a long string of numbers (three per - must pad numbers less than 100).
public byte[] StrToByteArray(string str)
{
if (str.Length == 0)
throw new Exception("Invalid string value in StrToByteArray");
byte val;
byte[] byteArr = new byte[str.Length / 3];
int i = 0;
int j = 0;
do
{
val = byte.Parse(str.Substring(i, 3));
byteArr[j++] = val;
i += 3;
}
while (i < str.Length);
return byteArr;
}
// Same comment as above. Normally the conversion would use an ASCII encoding in the other direction:
// System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();
// return enc.GetString(byteArr);
public string ByteArrToString(byte[] byteArr)
{
byte val;
string tempStr = "";
for (int i = 0; i <= byteArr.GetUpperBound(0); i++)
{
val = byteArr[i];
if (val < (byte)10)
tempStr += "00" + val.ToString();
else if (val < (byte)100)
tempStr += "0" + val.ToString();
else
tempStr += val.ToString();
}
return tempStr;
}
编辑：感谢您的所有帮助，但是您的回答并没有解决问题，结果证明这是非常简单的事情。我在一台服务器上生成了一个加密字符串，并将其交给另一台服务器上的处理程序进行解密和处理，但事实证明，在不同服务器上运行时加密的结果不同，因此接收服务器无法解密它。其中一个答案偶然发现了这个提示，这就是我接受它的原因
【问题讨论】：
标签： .net cryptography aes encryption rijndaelmanaged