当我将代码从.NET 4.5转换为.NET Core 2时，出现了以下错误消息。代码完全相同。我已经查看了一些帖子，但没有一个解决了这个错误。我正在使用RijndaelManaged加密。
Specified padding mode is not valid for this algorithm.
at Internal.Cryptography.UniversalCryptoDecryptor.DepadBlock(Byte[] block, Int32 offset, Int32 count)
at Internal.Cryptography.UniversalCryptoDecryptor.UncheckedTransformFinalBlock(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount)
at Internal.Cryptography.UniversalCryptoTransform.TransformFinalBlock(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount)
at System.Security.Cryptography.CryptoStream.FlushFinalBlock()
at System.Security.Cryptography.CryptoStream.Dispose(Boolean disposing)
at System.IO.Stream.Close()
at System.IO.StreamReader.Dispose(Boolean disposing)
at System.IO.TextReader.Dispose()
以下是我正在使用的代码。我在retval = srDecrypt.ReadToEnd();处遇到错误。
public static class EncryptionExtension
{
#region "Enumerations"
public enum EncryptionAlgorithms
{
Rijndael = 0
}
public enum CryptMethod
{
Encrypt = 0,
Decrypt = 1
}
#endregion
#region "Private Attributes"
private static byte[] CRYPT_SALT = {
99,
115,
120,
76,
105,
103,
105,
116
};
private static byte[] IV_8 = new byte[] {
2,
63,
9,
36,
235,
174,
78,
12
};
private static byte[] IV_16 = new byte[] {
15,
199,
56,
77,
244,
126,
107,
239,
9,
10,
88,
72,
24,
202,
31,
108
};
private static byte[] IV_24 = new byte[] {
37,
28,
19,
44,
25,
170,
122,
25,
25,
57,
127,
5,
22,
1,
66,
65,
14,
155,
224,
64,
9,
77,
18,
251
};
private static byte[] IV_32 = new byte[] {
133,
206,
56,
64,
110,
158,
132,
22,
99,
190,
35,
129,
101,
49,
204,
248,
251,
243,
13,
194,
160,
195,
89,
152,
149,
227,
245,
5,
218,
86,
161,
124
#endregion
};
#region "String Encryption"
public static string EncryptString(EncryptionAlgorithms Method, string Value, string Key)
{
return CryptString(CryptMethod.Encrypt, Method, Value, Key);
}
public static string DecryptString(EncryptionAlgorithms Method, string Value, string Key)
{
return CryptString(CryptMethod.Decrypt, Method, Value, Key);
}
public static string CryptString(CryptMethod Method, EncryptionAlgorithms Algorithm, string Value, string Key)
{
// Check arguments.
if (Value == null || Value.Length <= 0)
{
throw new ArgumentNullException("Data can not be empty");
}
if (Key == null || Key.Length <= 0)
{
throw new ArgumentNullException("Key can not be empty");
}
SymmetricAlgorithm provider = null;
string retval = null;
// Declare the stream used to encrypt to an in memory array of bytes.
MemoryStream msCrypt = null;
ICryptoTransform ICrypt = null;
try
{
// Create a Provider object
switch (Algorithm)
{
case EncryptionAlgorithms.Rijndael:
provider = new RijndaelManaged();
break;
}
provider.KeySize = provider.LegalKeySizes[0].MaxSize;
provider.BlockSize = provider.LegalBlockSizes[0].MaxSize;
provider.Key = DerivePassword(Key, provider.LegalKeySizes[0].MaxSize / 8);
switch (provider.BlockSize / 8)
{
case 8:
provider.IV = IV_8;
break;
case 16:
provider.IV = IV_16;
break;
case 24:
provider.IV = IV_24;
break;
case 32:
provider.IV = IV_32;
break;
}
if (Method == CryptMethod.Encrypt)
{
////encrypt value
//// Create a encryptor to perform the stream transform.
//ICrypt = provider.CreateEncryptor(provider.Key, provider.IV);
//// Create the streams used for encryption/decryption
//msCrypt = new MemoryStream();
//using (CryptoStream csEncrypt = new CryptoStream(msCrypt, ICrypt, CryptoStreamMode.Write))
//{
// using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
// {
// //Write all data to the stream.
// swEncrypt.Write(Value);
// }
//}
}
else
{
//decrypt value
//convert the ciphered text into a byte array
byte[] cipherBytes = null;
cipherBytes = System.Convert.FromBase64String(Value);
// Create a deccryptor to perform the stream transform.
ICrypt = provider.CreateDecryptor(provider.Key, provider.IV);
// Create the streams used for decryption.
msCrypt = new MemoryStream(cipherBytes);
using (CryptoStream csDecrypt = new CryptoStream(msCrypt, ICrypt, CryptoStreamMode.Write))
{
using (StreamReader srDecrypt = new StreamReader(csDecrypt))
{
//Read the decrypted bytes from the decrypting stream
// and place them in a string.
retval = srDecrypt.ReadToEnd();
}
}
}
}
catch (Exception ex)
{
//throw new AceExplorerException(ex.Message + " " + ex.StackTrace + " " + ex.TargetSite.ToString() + " " + ex.Source, ex.InnerException);
throw new Exception(ex.Message + " " + ex.StackTrace + " " + ex.TargetSite.ToString() + " " + ex.Source, ex.InnerException);
}
finally
{
// Clear the Provider object.
if ((provider != null))
{
provider.Clear();
}
}
if (Method == CryptMethod.Encrypt)
{
// Return the encrypted bytes from the memory stream.
return System.Convert.ToBase64String(msCrypt.ToArray());
}
else
{
// Return the unencrypted text
return retval;
}
}
#endregion
#region "Private Utility Functions"
private static byte[] DerivePassword(string Password, int Length)
{
Rfc2898DeriveBytes derivedBytes = new Rfc2898DeriveBytes(Password, CRYPT_SALT, 5);
return derivedBytes.GetBytes(Length);
}
#endregion
}
要运行它，您可以执行以下操作：
var decryptedstring = EncryptionExtension.CryptString(EncryptionExtension.CryptMethod.Decrypt, EncryptionExtension.EncryptionAlgorithms.Rijndael, "[Encrypted String]", "[key]");
更新： 我已添加了完整的类。抱歉我没有看到被封锁的部分。
更新2： 我将PaddingMode更改为None。我不再看到错误。但现在返回值是：�s)���j�U�#V�İ��H?X�
更新3： 在4.5上调试代码时，我有： - PKCS7中的Padding - BlockSize = 256 vs Core中的128 我尝试了Jimi的代码，但得到了奇怪的字符：寛Щ�챫蔧⽢쉈⩭｣啌斪ᆈ锚ય杄䕳 我尝试修改它，使用以下内容：Convert.ToBase64String(DecodedText); 我没有奇怪的字符，但结果与我预期的不同。
期望的结果：
密钥： DNACTSACEENGINE
字符串： IdIFR+PP5yDggqgSlB0KfcNTG+DkRuRbPfeljJeGm+c=
结果： !vbqZgZKbu4?8
更新： .Net Core不支持块大小为256
提前感谢。任何帮助都会受到赞赏。
provider.Key = DerivePassword(...);。将其更改为PasswordDeriveBytes secret = new PasswordDeriveBytes(Key, Encoding.ASCII.GetBytes((provider.LegalKeySizes[0].MaxSize / 8).ToString()));。在这里，StreamReader是无用的，除非您使用一个编码（可能是Unicode），无论如何，与加密使用相同的编码。我会获取csDecrypt流，将其转换为byte[]，然后使用Encoding.Unicode.GetString()进行最终转换。我不知道switch (provider.BlockSize / 8)如何工作。 - Jimi