Question

我想我有同样的问题like this guy，但我没有他/她那么幸运，因为提供的解决方案对我不起作用。

提供的解决方案在C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys（子目录中不）和C:\Users\[Username]\AppData\Roaming\Microsoft\Crypto\RSA（和子目录）中查找文件但是，由于我希望安装程序将应用程序安装到所有用户，因此自定义操作在SYSTEM - 用户下运行，这导致实际在C:\ProgramData\Application Data\Microsoft\Crypto\RSA\S-1-5-18中创建的文件。

当以管理员（右键单击 - ＆gt;以管理员身份运行）运行“普通”应用程序执行完全相同的代码时，会在C:\Users\[Username]\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21-1154405193-2177794320-4133247715-1000创建一个文件。

使用WIX自定义操作生成的证书似乎没有私钥（“密钥集不存在”），而“普通”应用程序生成的证书确实没有。

在查看文件的权限时，它们似乎没问题，即使它们不同（工作者确实包含SYSTEM用户），即使将SYSTEM添加到（ “非工作”）文件我无法读取私钥，此处也出现相同的错误。

然后我使用FindPrivateKey util查找相应的文件，但我得到的只是"Unable to obtain private key file name"。

好的，这里有什么？ Windows如何存储SYSTEM用户存储的证书的私钥？也许没有创建任何私钥文件？为什么呢？

Answer 1

我通过谷歌几乎所有的东西得到了解决方案......据我了解有一些事情要做：

生成X509Certificate2
Make sure the private key container is persistent (not temporary)
Make sure to have acccess rules for authenticated users，因此他们可以看到私钥

所以最终的代码是：

X509Certificate2 nonPersistentCert = CreateACertSomehow();

// this is only required since there's no constructor for X509Certificate2 that uses X509KeyStorageFlags but a password
// so we create a tmp password, which is not reqired to be secure since it's only used in memory
// and the private key will be included (plain) in the final cert anyway
const string TMP_PFX_PASSWORD = "password";

// create a pfx in memory ...
byte[] nonPersistentCertPfxBytes = nonPersistentCert.Export(X509ContentType.Pfx, TMP_PFX_PASSWORD);

// ... to get an X509Certificate2 object with the X509KeyStorageFlags.PersistKeySet flag set
X509Certificate2 serverCert = new X509Certificate2(nonPersistentCertPfxBytes, TMP_PFX_PASSWORD,
    X509KeyStorageFlags.PersistKeySet | X509KeyStorageFlags.MachineKeySet | X509KeyStorageFlags.Exportable); // use X509KeyStorageFlags.Exportable only if you want the private key to tbe exportable

// get the private key, which currently only the SYSTEM-User has access to
RSACryptoServiceProvider systemUserOnlyReadablePrivateKey = serverCert.PrivateKey as RSACryptoServiceProvider;

// create cspParameters
CspParameters cspParameters = new CspParameters(systemUserOnlyReadablePrivateKey.CspKeyContainerInfo.ProviderType, 
    systemUserOnlyReadablePrivateKey.CspKeyContainerInfo.ProviderName, 
    systemUserOnlyReadablePrivateKey.CspKeyContainerInfo.KeyContainerName)
{
    // CspProviderFlags.UseArchivableKey means the key is exportable, if you don't want that use CspProviderFlags.UseExistingKey instead
    Flags = CspProviderFlags.UseMachineKeyStore | CspProviderFlags.UseArchivableKey,
    CryptoKeySecurity = systemUserOnlyReadablePrivateKey.CspKeyContainerInfo.CryptoKeySecurity
};

// add the access rules
cspParameters.CryptoKeySecurity.AddAccessRule(new CryptoKeyAccessRule(new SecurityIdentifier(WellKnownSidType.AuthenticatedUserSid, null), CryptoKeyRights.GenericRead, AccessControlType.Allow));

// create a new RSACryptoServiceProvider from the cspParameters and assign that as the private key
RSACryptoServiceProvider allUsersReadablePrivateKey = new RSACryptoServiceProvider(cspParameters);
serverCert.PrivateKey = allUsersReadablePrivateKey;

// finally place it into the cert store
X509Store rootStore = new X509Store(StoreName.My, StoreLocation.LocalMachine);
rootStore.Open(OpenFlags.ReadWrite);
rootStore.Add(serverCert);
rootStore.Close();

// :)

证书存储区中证书的私钥不可读

1 个答案: