System.Security.Cryptography.CryptographicException -object已经存在

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){} 
    }

什么是抛出下列异常的原因：System.Security.Cryptography.CryptographicException -object已经存在

System.Security.Cryptography.CryptographicException - object already exist

堆栈跟踪如下：

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)

来源

2012-07-11 DevT

快速谷歌把这个了：http://pwnedcode.wordpress.com/2008/11/10/fixing-cryptographicexception-%E2%80 ％9Cobject-已经存在％E2％80％9D /。你有没有尝试修复访问密钥容器？ – 2012-07-11 17:19:37

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

这是因为程序与不同的用户一起运行。一个用普通用户，另一个用启动用户。

创建密钥时，其权限仅授予创建者。

因此，您需要更改密钥的权限才能让所有人使用。

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);

来源

2012-07-12 04:30:57 DevT

System.Security.Cryptography.CryptographicException -object已经存在

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