Question

我正在尝试使用CryptUnprotectData将使用CryptProtectData保护的密码读入SecureString并使用它来连接数据库。我可以输出正确的密码，但尝试创建新的SqlConnection之后会失败并显示以下内容：

System.TypeInitializationException was unhandled
  HResult=-2146233036
  Message=The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception.
  Source=System.Data
  TypeName=System.Data.SqlClient.SqlConnection
  StackTrace:
       at System.Data.SqlClient.SqlConnection..ctor()
       at System.Data.SqlClient.SqlConnection..ctor(String connectionString, SqlCredential credential)
       at System.Data.SqlClient.SqlConnection..ctor(String connectionString)
       at ProtectedSqlTest.Program.Main() in C:\Git\ProtectedSqlTest\ProtectedSqlTest\Program.cs:line 16
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 
       HResult=-2146233036
       Message=The type initializer for 'System.Data.SqlClient.SqlConnectionFactory' threw an exception.
       Source=System.Data
       TypeName=System.Data.SqlClient.SqlConnectionFactory
       StackTrace:
            at System.Data.SqlClient.SqlConnection..cctor()
       InnerException: 
            HResult=-2146233036
            Message=The type initializer for 'System.Data.SqlClient.SqlPerformanceCounters' threw an exception.
            Source=System.Data
            TypeName=System.Data.SqlClient.SqlPerformanceCounters
            StackTrace:
                 at System.Data.SqlClient.SqlConnectionFactory..cctor()
            InnerException: 
                 HResult=-2147024809
                 Message=The parameter is incorrect. (Exception from HRESULT: 0x80070057 (E_INVALIDARG))
                 Source=mscorlib
                 StackTrace:
                      at System.Globalization.TextInfo.InternalChangeCaseString(IntPtr handle, IntPtr handleOrigin, String localeName, String str, Boolean isToUpper)
                      at System.Globalization.TextInfo.ToLower(String str)
                      at System.String.ToLower(CultureInfo culture)
                      at System.Diagnostics.PerformanceCounterLib.GetPerformanceCounterLib(String machineName, CultureInfo culture)
                      at System.Diagnostics.PerformanceCounterLib.IsCustomCategory(String machine, String category)
                      at System.Diagnostics.PerformanceCounter.InitializeImpl()
                      at System.Diagnostics.PerformanceCounter.set_RawValue(Int64 value)
                      at System.Data.ProviderBase.DbConnectionPoolCounters.Counter..ctor(String categoryName, String instanceName, String counterName, PerformanceCounterType counterType)
                      at System.Data.ProviderBase.DbConnectionPoolCounters..ctor(String categoryName, String categoryHelp)
                      at System.Data.SqlClient.SqlPerformanceCounters..ctor()
                      at System.Data.SqlClient.SqlPerformanceCounters..cctor()
                 InnerException:

仅仅为CryptUnprotectData调用SqlConnection就足够了，连接本身不需要使用返回的SecureString。

我正在使用from here中描述的扩展方法this post进行我的最小重复：

class Program
{
    const string ProtectedSecret = /* SNIP - base 64 encoded protected data here */;
    static void Main()
    {
        // calling AppendProtectedData breaks the following SqlConnection
        // without the following line the application works fine
        new SecureString().AppendProtectedData(Convert.FromBase64String(ProtectedSecret));

        using (var conn = new SqlConnection("Server=(localdb)\\MSSqlLocalDb;Trusted_Connection=true"))
        using (var cmd = new SqlCommand("select 1", conn))
        {
            conn.Open();
            cmd.ExecuteNonQuery();
        }
    }
}

如果我在之前创建新的SqlConnection 我加载密码，我可以在应用程序的持续时间内创建新的SqlConnection，因为它似乎使用相同的SqlConnectionFactory，但这意味着作为一种解决方法，我必须在应用程序开始时做这样的事情：

new SqlConnection().Dispose();

...我想避免。

以下内容无效：

调试与发布版本

在Visual Studio中调试与通过命令行运行

更改传递给CryptProtectFlags。{/ li>的CryptUnprotectData
从保护方法中删除RuntimeHelpers.PrepareConstrainedRegions()。

Windows 10，VS Enterprise 2015，控制台应用程序（.NET 4.6.1）

UPDATE：在另一个线程中运行数据保护代码会产生一个类似的异常，其根本原因不同：

System.TypeInitializationException was unhandled HResult=-2146233036 Message=The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception. Source=System.Data TypeName=System.Data.SqlClient.SqlConnection StackTrace: at System.Data.SqlClient.SqlConnection..ctor() at System.Data.SqlClient.SqlConnection..ctor(String connectionString, SqlCredential credential) at System.Data.SqlClient.SqlConnection..ctor(String connectionString) at ProtectedSqlTest.Program.Main() in C:\Git\ProtectedSqlTest\ProtectedSqlTest\Program.cs:line 17 at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args) at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() at System.Threading.ThreadHelper.ThreadStart_Context(Object state) at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ThreadHelper.ThreadStart() InnerException: HResult=-2146233036 Message=The type initializer for 'System.Data.SqlClient.SqlConnectionFactory' threw an exception. Source=System.Data TypeName=System.Data.SqlClient.SqlConnectionFactory StackTrace: at System.Data.SqlClient.SqlConnection..cctor() InnerException: HResult=-2146233036 Message=The type initializer for 'System.Data.SqlClient.SqlPerformanceCounters' threw an exception. Source=System.Data TypeName=System.Data.SqlClient.SqlPerformanceCounters StackTrace: at System.Data.SqlClient.SqlConnectionFactory..cctor() InnerException: BareMessage=Configuration system failed to initialize HResult=-2146232062 Line=0 Message=Configuration system failed to initialize Source=System.Configuration StackTrace: at System.Configuration.ClientConfigurationSystem.EnsureInit(String configKey) at System.Configuration.ClientConfigurationSystem.PrepareClientConfigSystem(String sectionName) at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName) at System.Configuration.ConfigurationManager.GetSection(String sectionName) at System.Configuration.PrivilegedConfigurationManager.GetSection(String sectionName) at System.Diagnostics.DiagnosticsConfiguration.Initialize() at System.Diagnostics.DiagnosticsConfiguration.get_SwitchSettings() at System.Diagnostics.Switch.InitializeConfigSettings() at System.Diagnostics.Switch.InitializeWithStatus() at System.Diagnostics.Switch.get_SwitchSetting() at System.Data.ProviderBase.DbConnectionPoolCounters..ctor(String categoryName, String categoryHelp) at System.Data.SqlClient.SqlPerformanceCounters..ctor() at System.Data.SqlClient.SqlPerformanceCounters..cctor() InnerException: HResult=-2147024809 Message=Item has already been added. Key in dictionary: 'MACHINE' Key being added: 'MACHINE' Source=mscorlib StackTrace: at System.Collections.Hashtable.Insert(Object key, Object nvalue, Boolean add) at System.Collections.Hashtable.Add(Object key, Object value) at System.Configuration.Internal.InternalConfigRoot.GetConfigRecord(String configPath) at System.Configuration.ClientConfigurationSystem.EnsureInit(String configKey) InnerException:

Answer 1

有趣的是，错误代码是：

<script type="text/javascript">
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        var prtContent = document.getElementById("page-content");
        var WinPrint = window.open('', '', 'left=0,top=0,width=800,height=900,toolbar=0,scrollbars=0,status=0');
        WinPrint.document.write(prtContent.innerHTML);
        WinPrint.document.close();
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        setTimeout(() => WinPrint.print(), 1000);
        WinPrint.close();
});
</script>

调用internal static PerformanceCounterLib GetPerformanceCounterLib(string machineName, CultureInfo culture) { SharedUtils.CheckEnvironment(); string lcidString = culture.LCID.ToString("X3", CultureInfo.InvariantCulture); if (machineName.CompareTo(".") == 0) machineName = ComputerName.ToLower(CultureInfo.InvariantCulture); else machineName = machineName.ToLower(CultureInfo.InvariantCulture); ...的行会导致异常。

您只需调用代码

即可重现相同的行为

ComputerName.ToLower(CultureInfo.InvariantCulture)

以某种方式在TextInfo类

的构造函数中

new SecureString().AppendProtectedData(Convert.FromBase64String(ProtectedSecret));
string lower = "Something".ToLower(CultureInfo.InvariantCulture);

如果在

this.m_dataHandle = CompareInfo.InternalInitSortHandle(m_textInfoName, out handleOrigin);

函数之前未调用此函数，

将返回无效数据。

这似乎是框架中的一个错误。您可以将其提交给Microsoft。在此期间，您可以事先调用此行以防止错误。

CryptUnprotectData

Answer 2

我最近遇到了类似的症状，使用http://www.griffinscs.com/?p=12中的相同代码：对CryptUnprotectData的任何调用都会导致某些无关代码出现异常。有趣的是，故障只发生在Windows 10机器上;相同的代码在Windows 7机器上运行良好。

我通过将szDataDescr和CryptProtectData中的CryptUnprotectData参数的声明从string更改为IntPtr并传递{{1}来解决问题在两次调用中代替IntPtr.Zero。

P / Invoke CryptUnprotectData中断SqlConnection构造函数

2 个答案: