我正在尝试使用CryptUnprotectData
来读取使用CryptProtectData
密码保护的内容到一个SecureString
中,并使用它连接到数据库。我可以正确地获取密码,但是之后尝试创建一个新的SqlConnection
失败,错误信息如下:
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:
只需简单调用
CryptUnprotectData
,SqlConnection
就会失败,连接本身不需要使用返回的SecureString
。我在我的最小复现中使用这里描述的扩展方法,如此文所述。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();
}
}
}
如果我在加载密码之前创建一个新的
SqlConnection
,那么在应用程序运行期间,我可以正常创建新的 SqlConnection
,因为它似乎使用相同的 SqlConnectionFactory
。但这意味着我必须在应用程序开始时执行以下操作:new SqlConnection().Dispose();
我希望避免以下内容:
- Debug和Release构建
- 在Visual Studio中调试与通过命令行运行的调试
- 更改传递给
CryptUnprotectData
的CryptProtectFlags
。 - 从保护方法中删除
RuntimeHelpers.PrepareConstrainedRegions()
。
Windows 10,VS Enterprise 2015,Console Application(.NET 4.6.1)
更新:在另一个线程中运行数据保护代码时会产生类似的异常,但根本原因不同:
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: