从.net 4.5转换为.net core 2时，出现以下错误消息。代码完全相同。我看到了一些帖子，但没有一个可以解决此错误。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()
下面是我正在使用的代码。我在以下位置遇到错误： retval = srDecrypt.ReadToEnd（）;
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： 我添加了全班。抱歉，我没有看到被屏蔽的部分
更新2： 我将PaddingMode更改为None。我不再看到错误。但是现在返回值为：s）.j.U。＃V.İ��H？X。
更新3： 在4.5上调试代码时，我有： -PKCS7中的填充 -BlockSize = 256 vs核心128 我尝试了Jimi的代码，但遇到了奇怪的字符：寛Щ.챫蔧⽢쉈⩭｣啌斪ᆈ锚ય杄䕳 我尝试通过使用以下命令对其进行修改：Convert.ToBase64String（DecodedText）; 我没有奇怪的字符，但没有预期的结果。
预期结果：
键： DNACTSACEENGINE
字符串： IdIFR + PP5yDggqgSlB0KfcNTG + DkRuRbPfeljJeGm + c =
结果：！vbqZgZKbu4？8
更新 .Net Core不支持256的块大小
先谢谢了。感谢您的帮助
答案 0 :(得分：2)
我修复了无法产生一致结果的零件。
但是，由于在您的代码中注释了Encryption方法，所以我不确定Encrypted输入值是否正是此处显示的值，还是来自不同的来源和/或不同的Encryption方法。 />
我已将MemoryStream分配的字节数组（由加密和解密方法使用）与原始值的Unicode编码/解码集成在一起。
当然，可以使用其他编码。 （也已使用UTF8测试，应该是默认设置。）
该字符串照常是Base64Encoded / Decoded。
我在这里仅发布#region "String Encryption"块中包含的代码部分。
其余代码保持不变。
Tested on: Visual Studio pro 15.8.0
.Net FrameWork: Core 2.1
C# 6.0 and C# 7.3
这种加密/解密方法称为：
string encryptedstring = EncryptionExtension.CryptString(
EncryptionExtension.CryptMethod.Encrypt, EncryptionExtension.EncryptionAlgorithms.Rijndael,
"Some text to encrypt, more text to encrypt", "SomeKey");
string decryptedstring = EncryptionExtension.CryptString(
EncryptionExtension.CryptMethod.Decrypt, EncryptionExtension.EncryptionAlgorithms.Rijndael,
encryptedstring, "SomeKey");
#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)
{
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;
try
{
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)
{
ICryptoTransform ICrypt = provider.CreateEncryptor(provider.Key, provider.IV);
byte[] EncodedText = Encoding.Unicode.GetBytes(Value);
// Create the streams used for encryption/decryption
using (MemoryStream msCrypt = new MemoryStream())
using (CryptoStream csEncrypt = new CryptoStream(msCrypt, ICrypt, CryptoStreamMode.Write))
{
csEncrypt.Write(EncodedText, 0, EncodedText.Length);
csEncrypt.FlushFinalBlock();
return Convert.ToBase64String(msCrypt.ToArray());
}
}
else
{
byte[] cipherBytes = Convert.FromBase64String(Value);
ICryptoTransform ICrypt = provider.CreateDecryptor(provider.Key, provider.IV);
// Create the streams used for decryption.
using (MemoryStream msCrypt = new MemoryStream(cipherBytes))
using (CryptoStream csDecrypt = new CryptoStream(msCrypt, ICrypt, CryptoStreamMode.Read))
{
byte[] DecodedText = new byte[cipherBytes.Length];
int decryptedCount = csDecrypt.Read(DecodedText, 0, DecodedText.Length);
return Encoding.Unicode.GetString(DecodedText, 0, decryptedCount);
}
}
}
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();
}
}
}
#endregion
private static byte[] DerivePassword(string Password, int Length)
{
Rfc2898DeriveBytes derivedBytes = new Rfc2898DeriveBytes(Password, CRYPT_SALT, 1000);
return derivedBytes.GetBytes(Length);
}