private SNILoadHandle() : base(IntPtr.Zero, true)
{
this.ReadAsyncCallbackDispatcher = new SNINativeMethodWrapper.SqlAsyncCallbackDelegate(SNILoadHandle.ReadDispatcher);
this.WriteAsyncCallbackDispatcher = new SNINativeMethodWrapper.SqlAsyncCallbackDelegate(SNILoadHandle.WriteDispatcher);
this._sniStatus = uint.MaxValue;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
}
finally
{
this._sniStatus = SNINativeMethodWrapper.SNIInitialize();
uint qInfo = 0;
if (this._sniStatus == 0)
{
SNINativeMethodWrapper.SNIQueryInfo(SNINativeMethodWrapper.QTypes.SNI_QUERY_CLIENT_ENCRYPT_POSSIBLE, ref qInfo);
}
this._encryptionOption = (qInfo == 0) ? EncryptionOptions.NOT_SUP : EncryptionOptions.OFF;
base.handle = (IntPtr)1;
}
}
private SNILoadHandle() : base(IntPtr.Zero, true)
{
// SQL BU DT 346588 - from security review - SafeHandle guarantees this is only called once.
// The reason for the safehandle is guaranteed initialization and termination of SNI to
// ensure SNI terminates and cleans up properly.
RuntimeHelpers.PrepareConstrainedRegions();
try {} finally {
_sniStatus = SNINativeMethodWrapper.SNIInitialize();
UInt32 value = 0;
// VSDevDiv 479597: If initialize fails, don't call QueryInfo.
if (TdsEnums.SNI_SUCCESS == _sniStatus)
{
// Query OS to find out whether encryption is supported.
SNINativeMethodWrapper.SNIQueryInfo(SNINativeMethodWrapper.QTypes.SNI_QUERY_CLIENT_ENCRYPT_POSSIBLE, ref value);
}
_encryptionOption = (value == 0) ? EncryptionOptions.NOT_SUP : EncryptionOptions.OFF;
base.handle = (IntPtr)1; // Initialize to non-zero dummy variable.
}
}
