OpenCSP 失败，错误代码为 2148073494

Question

当我们的 Azure 应用服务移至应用服务环境时，我们开始看到此异常间歇性发生。我们正在使用 Identity Server 4，并且在令牌签名期间发生异常。这可以在下面的调用堆栈中看到。

签名证书永远不会保存到证书存储中，它是作为字节数组从数据库中加载的：

new X509Certificate2(rawData, password,
                    X509KeyStorageFlags.MachineKeySet |
                    X509KeyStorageFlags.PersistKeySet);

这些参考似乎是同一个问题：

.NET Core X509Certificate2.PrivateKey throws nte_bad_keyset error

https://github.com/dotnet/corefx/issues/2583

编辑： 最初我们认为这是 Azure 中 App Service Env 特有的东西，但现在我们在标准 App Services 中看到了异常。作为测试，我们创建了一个 Azure Web 作业，该作业从字节数组加载证书并创建 JWT 令牌（需要私钥进行签名）。这会重现错误。还要注意的是，当某些标志传递给 X509Certificate2 构造器（例如 X509KeyStorageFlags.UserKeySet）时，Azure Web 作业甚至不会运行。

堆栈跟踪每次都相同：

System.Security.Cryptography.CryptographicException:
   at Internal.NativeCrypto.CapiHelper.CreateProvHandle(CspParameters parameters, Boolean randomKeyContainer)
   at System.Security.Cryptography.RSACryptoServiceProvider.get_SafeProvHandle()
   at System.Security.Cryptography.RSACryptoServiceProvider.get_SafeKeyHandle()
   at System.Security.Cryptography.RSACryptoServiceProvider..ctor(Int32 keySize, CspParameters parameters, Boolean useDefaultKeySize)
   at System.Security.Cryptography.RSACryptoServiceProvider..ctor(CspParameters parameters)
   at Internal.Cryptography.Pal.CertificatePal.<>c.<GetRSAPrivateKey>b__59_0(CspParameters csp)
   at Internal.Cryptography.Pal.CertificatePal.GetPrivateKey[T](Func`2 createCsp, Func`2 createCng)
   at Internal.Cryptography.Pal.CertificatePal.GetRSAPrivateKey()
   at Internal.Cryptography.Pal.CertificateExtensionsCommon.GetPrivateKey[T](X509Certificate2 certificate, Predicate`1 matchesConstraints)
   at Microsoft.IdentityModel.Tokens.X509SecurityKey.get_PrivateKey()
   at Microsoft.IdentityModel.Tokens.X509SecurityKey.get_HasPrivateKey()
   at Microsoft.IdentityModel.Tokens.AsymmetricSignatureProvider.HasPrivateKey(SecurityKey key)
   at Microsoft.IdentityModel.Tokens.AsymmetricSignatureProvider..ctor(SecurityKey key, String algorithm, Boolean willCreateSignatures)
   at Microsoft.IdentityModel.Tokens.CryptoProviderFactory.CreateSignatureProvider(SecurityKey key, String algorithm, Boolean willCreateSignatures)
   at Microsoft.IdentityModel.Tokens.CryptoProviderFactory.CreateForSigning(SecurityKey key, String algorithm)
   at System.IdentityModel.Tokens.Jwt.JwtSecurityTokenHandler.CreateEncodedSignature(String input, SigningCredentials signingCredentials)
   at System.IdentityModel.Tokens.Jwt.JwtSecurityTokenHandler.WriteToken(SecurityToken token)
   at IdentityServer4.Services.DefaultTokenCreationService.CreateJwtAsync(JwtSecurityToken jwt)
   at IdentityServer4.Services.DefaultTokenCreationService.<CreateTokenAsync>d__3.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at IdentityServer4.Services.DefaultTokenService.<CreateSecurityTokenAsync>d__9.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
   at IdentityServer4.ResponseHandling.TokenResponseGenerator.<CreateAccessTokenAsync>d__10.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at IdentityServer4.ResponseHandling.TokenResponseGenerator.<ProcessTokenRequestAsync>d__8.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at IdentityServer4.ResponseHandling.TokenResponseGenerator.<ProcessAsync>d__6.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at IdentityServer4.Endpoints.TokenEndpoint.<ProcessTokenRequestAsync>d__6.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at IdentityServer4.Endpoints.TokenEndpoint.<ProcessAsync>d__5.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at IdentityServer4.Hosting.IdentityServerMiddleware.<Invoke>d__3.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at IdentityServer4.Hosting.FederatedSignOutMiddleware.<Invoke>d__6.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at IdentityServer4.Hosting.AuthenticationMiddleware.<Invoke>d__2.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware`1.<Invoke>d__18.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware`1.<Invoke>d__18.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Microsoft.AspNetCore.Cors.Infrastructure.CorsMiddleware.<Invoke>d__7.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at IdentityServer4.Hosting.BaseUrlMiddleware.<Invoke>d__2.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware`1.<Invoke>d__18.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware`1.<Invoke>d__18.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware`1.<Invoke>d__18.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware`1.<Invoke>d__18.MoveNext()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.ApplicationInsights.AspNetCore.ExceptionTrackingMiddleware.<Invoke>d__4.MoveNext()

Answer 1

该错误意味着在证书得知密钥存储位置后的某处，它被删除了。

也许有什么东西在呼唤CngKey.Delete
可能有人将其克隆到 RSACryptoServiceProvider 中并将 PersistKeyInCsp 设置为 false。
也许事后正在清理机器密钥目录。
另一种（非常罕见的）已知情况是两个线程并行加载 PFX（它们不必在同一进程中），其中一个线程在导入时没有断言 PersistKeySet .

如果您正在加载和丢弃您确实不应该设置的证书 PersistKeySet。每次打开 PFX 时，都会在磁盘上为其中包含的每个私钥创建另一个文件......这些文件会正常清理（只要进程不会异常终止），但 PersistKeySet 会阻止清理发生。

如果代码分析中没有任何内容揭示两个明显的关键删除位置（PersistKeyInCsp=false 是偷偷摸摸的），那么您将不得不遵循 .NET Core X509Certificate2.PrivateKey throws nte_bad_keyset error 中的文件系统审计建议。

Answer 2

为了解决这个问题，我们从 X509 证书 (X509Certificate2) 切换到 RSA 生成的密钥 (RSACryptoServiceProvider)。 Identity Server 4 支持两者。不再出现异常。

Answer 3

也许您没有让 IIS 访问您的私钥。我有同样的错误，但有必要使用 X509 证书而不是密钥。我刚刚授予从 MMC 上的 IIS_IUSRS 证书读取私钥的权限。这对我有帮助。

@thames 提供了完整的答案： How to give ASP.NET access to a private key in a certificate in the certificate store?

更新：

分步指南：

Create/purchase 带有私钥的证书
将证书导入 "Local Computer" 帐户（不是 "Current User"）。在导入向导中检查 "Allow private key to be exported"。
打开 MMC 控制台并添加证书管理单元。选择 "Computer Account"。
找到您的证书并右键单击它。选择 "All Tasks" > "Manage Private Keys"
为用户 IIS_IUSRS 或 IIS AppPool\ 添加对密钥的读取权限（取决于 IIS 版本和配置。最好使用 "Advanced" 按钮显示所有可能的选项）
重新启动您的应用程序

OpenCSP 失败，错误代码为 2148073494

OpenCSP failed with error code 2148073494

c#

.net-core

private-key

x509certificate2

identityserver4