System.Security.Cryptography.CryptographicException -object已經存在

public RSAKeyPair() 
    { 
     string keyContainerName="pEncKey" 
     CspParameters cspp = new CspParameters(); 
     cspp.Flags = CspProviderFlags.UseMachineKeyStore; 
     cspp.KeyContainerName = keyContainerName; 
     try 
     { 
      m_RSA = new RSACryptoServiceProvider(1024, cspp); 
     } 
     catch(Exception e){} 
    }

什麼是拋出下列異常的原因：System.Security.Cryptography.CryptographicException -object已經存在

System.Security.Cryptography.CryptographicException - object already exist

堆棧跟蹤如下：

at System.Security.Cryptography.CryptographicException.ThrowCryptographicException(Int32 hr) 
    at System.Security.Cryptography.Utils._CreateCSP(CspParameters param, Boolean randomKeyContainer, SafeProvHandle& hProv) 
    at System.Security.Cryptography.Utils.CreateProvHandle(CspParameters parameters, Boolean randomKeyContainer) 
    at System.Security.Cryptography.Utils.GetKeyPairHelper(CspAlgorithmType keyType, CspParameters parameters, Boolean randomKeyContainer, Int32 dwKeySize, SafeProvHandle& safeProvHandle, SafeKeyHandle& safeKeyHandle) 
    at System.Security.Cryptography.RSACryptoServiceProvider.GetKeyPair() 
    at System.Security.Cryptography.RSACryptoServiceProvider..ctor(Int32 dwKeySize, CspParameters parameters, Boolean useDefaultKeySize) 
    at System.Security.Cryptography.RSACryptoServiceProvider..ctor(Int32 dwKeySize, CspParameters parameters) 
    at XXXXXXXX.Core.RSAKeyPair..ctor(String keyContainerName)

來源

2012-07-11 DevT

快速谷歌把這個了：http://pwnedcode.wordpress.com/2008/11/10/fixing-cryptographicexception-%E2%80 ％9Cobject-已經存在％E2％80％9D /。你有沒有嘗試修復訪問密鑰容器？ – 2012-07-11 17:19:37

@owlstead這是爲asp.net命令行之一。 :( – DevT 2012-07-12 03:38:20

這是因爲程序與不同的用戶一起運行。一個用普通用戶，另一個用啓動用戶。

創建密鑰時，其權限僅授予創建者。

因此，您需要更改密鑰的權限才能讓所有人使用。

CspParameters cspParams; 
cspParams = new CspParameters(PROVIDER_RSA_FULL); 
cspParams.KeyContainerName = CONTAINER_NAME; 
cspParams.Flags = CspProviderFlags.UseMachineKeyStore; 
cspParams.ProviderName = "Microsoft Strong Cryptographic Provider"; 

CryptoKeyAccessRule rule = new CryptoKeyAccessRule("everyone", CryptoKeyRights.FullControl, AccessControlType.Allow); 

cspParams.CryptoKeySecurity = new CryptoKeySecurity(); 
cspParams.CryptoKeySecurity.SetAccessRule(rule);

來源

2012-07-12 04:30:57 DevT

System.Security.Cryptography.CryptographicException -object已經存在

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