在使用rsa提供程序加密和描述字符串时，我收到此错误。
RSA数据解密错误。要解密的数据超过此64字节模数的最大值。
任何人都知道如何解决这个错误吗？
internal sealed class RSAProvider
{
#region key store class
[Serializable]
private struct rsaKey
{
public rsaKey(RSAParameters rsaKeyInfo)
{
D = rsaKeyInfo.D;
DP = rsaKeyInfo.DP;
DQ = rsaKeyInfo.DQ;
Exponent = rsaKeyInfo.Exponent;
InverseQ = rsaKeyInfo.InverseQ;
Modulus = rsaKeyInfo.Modulus;
P = rsaKeyInfo.P;
Q = rsaKeyInfo.Q;
}
public RSAParameters CreateRSAKey()
{
RSAParameters rsaKeyInfo = new RSAParameters();
rsaKeyInfo.D = D;
rsaKeyInfo.DP = DP;
rsaKeyInfo.DQ = DQ;
rsaKeyInfo.Exponent = Exponent;
rsaKeyInfo.InverseQ = InverseQ;
rsaKeyInfo.Modulus = Modulus;
rsaKeyInfo.P = P;
rsaKeyInfo.Q = Q;
return rsaKeyInfo;
}
public byte[] D;
public byte[] DP;
public byte[] DQ;
public byte[] Exponent;
public byte[] InverseQ;
public byte[] Modulus;
public byte[] P;
public byte[] Q;
}
#endregion
private static RSAParameters rsaKeyParameters;
static RSAProvider()
{
string rsaKeyString = System.Configuration.ConfigurationSettings.AppSettings["RSAKey"];
if(rsaKeyString != null)
{
rsaKeyParameters = GetKeyByString(rsaKeyString);
}
}
private RSAProvider()
{
}
private static RSAParameters RSAKeyInfo
{
get
{
return rsaKeyParameters;
}
}
private static bool DoOAEPPadding
{
get
{
return false;
}
}
public static string GenerateKey(int keySize)
{
//Create a new instance of RSACryptoServiceProvider to generate
//public and private key data.
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(keySize);
RSAParameters rsaKeyInfo = RSA.ExportParameters(true);
return GetKeyString(rsaKeyInfo);
}
#region Encrypt
public static byte[] Encrypt(byte[] dataToEncrypt, string rsaKeyString)
{
RSAParameters rsaKeyInfo = GetKeyByString(rsaKeyString);
return Encrypt(dataToEncrypt, rsaKeyInfo);
}
public static byte[] Encrypt(byte[] dataToEncrypt, RSAParameters rsaKeyInfo)
{
try
{
//Create a new instance of RSACryptoServiceProvider.
// Common.Identity.ImpersonateValidUser("prana", "eetplpvt", "Avdhoota1985");
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
//Import the RSA Key information. This only needs
//toinclude the public key information.
RSA.ImportParameters(rsaKeyInfo);
//Encrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
//return RSA.Encrypt(dataToEncrypt, DoOAEPPadding);
byte[] data = RSA.Encrypt(dataToEncrypt, DoOAEPPadding);
RSA.Clear();
//Common.Identity.UndoImpersonation();
return data;
}
//Catch and display a CryptographicException
//to the console.
catch(CryptographicException e)
{
// Updated By Divya Bhalodia on 27th June 2008 for Localization task
//throw new Exception("Data encryption error.", e);
Common.EnumLocalization.EnumLocalization loc = new Common.EnumLocalization.EnumLocalization(ASP.BL.ApplicationUsers.ApplicationUserController.CurrentUserCulture.Code, ASP.BL.Applications.ApplicationController.CurrentApplicationInfo.ItemId);
throw new Exception(loc.LocalizeString("RSA Data encryption error.") + e.Message, e);
// end Updated - Divya
}
}
public static byte[] Encrypt(byte[] dataToEncrypt)
{
return Encrypt(dataToEncrypt, RSAKeyInfo);
}
#endregion
#region Decrypt
public static byte[] Decrypt(byte[] dataToDecrypt, string rsaKeyString, bool doOAEPPadding)
{
RSAParameters rsaKeyInfo = GetKeyByString(rsaKeyString);
return Decrypt(dataToDecrypt, rsaKeyInfo, doOAEPPadding);
}
public static byte[] Decrypt(byte[] dataToDecrypt, RSAParameters rsaKeyInfo, bool doOAEPPadding)
{
try
{
//Create a new instance of RSACryptoServiceProvider.
Common.Identity.ImpersonateValidUser();
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
//Import the RSA Key information. This needs
//to include the private key information.
RSA.ImportParameters(rsaKeyInfo);
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
//return RSA.Decrypt(dataToDecrypt, doOAEPPadding);
byte[] data = RSA.Decrypt(dataToDecrypt, doOAEPPadding);
RSA.Clear();
Common.Identity.UndoImpersonation();
return data;
}
//Catch and display a CryptographicException
//to the console.
catch(CryptographicException e)
{
// Updated By Divya Bhalodia on 27th June 2008 for Localization task
//throw new Exception("Data decryption error.", e);
Common.EnumLocalization.EnumLocalization loc = new Common.EnumLocalization.EnumLocalization(ASP.BL.ApplicationUsers.ApplicationUserController.CurrentUserCulture.Code, ASP.BL.Applications.ApplicationController.CurrentApplicationInfo.ItemId);
throw new Exception(loc.LocalizeString("RSA Data decryption error.") + e.Message, e);
// end Updated - Divya
}
}
public static byte[] Decrypt(byte[] dataToDecrypt)
{
return Decrypt(dataToDecrypt, RSAKeyInfo, DoOAEPPadding);
}
#endregion
#region Additional functions
private static string GetKeyString(RSAParameters rsaKeyInfo)
{
byte[] tmp;
rsaKey k = new rsaKey(rsaKeyInfo);
BinaryFormatter formater = new BinaryFormatter();
using(MemoryStream stream = new MemoryStream())
{
formater.Serialize(stream, k);
tmp = stream.ToArray();
}
Code(tmp);
return Convert.ToBase64String(tmp);
}
private static RSAParameters GetKeyByString(string rsaKeyString)
{
rsaKey k;
byte[] tmp = Convert.FromBase64String(rsaKeyString);
Code(tmp);
BinaryFormatter formater = new BinaryFormatter();
using(MemoryStream stream = new MemoryStream(tmp))
{
k = (rsaKey)formater.Deserialize(stream);
}
return k.CreateRSAKey();
}
private static void Code(byte[] tmp)
{
byte mask1 = 0x55;
byte mask3 = 0xB9;
byte mask4 = 0xCF;
for(int i = 0; i
答案 0 :(得分：0)
我遇到了类似的问题，但你可以做两件事来帮助自己克服它们。
当以字符串形式存储此信息时，请确保所有数字都是相同的长度，因此如果格式化程序返回15，则将字符串存储为015，以便稍后除以3以获取字节然后放入数组中
要解密数据，您只需读取字符串的长度并确定要解密的块数。逐个破坏这些，然后您可以使用已损坏的字节数组重新创建对象。
如果您想要实际代码，请亲自与我联系，我将能够通过一些可以为您完成此操作的脚本帮助您。