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Software components for data protection, secure storage and transfer

Alternate datastream

Also by EldoS: BizCrypto
Components for BizTalk® and SQL Server® Integration Services that let you securely store and transfer information in your business automation solutions.
Posted: 10/23/2007 04:02:39
by Dan Cooper (Basic support level)
Joined: 06/27/2007
Posts: 125

When using the CallbackFS to host a drive we are having an issue where the system requests to create a file called 'thumbs.db:encryptable' which I understand is an alternate datastream object but I was under the impression that alternate datastreams should not be forwarded by the driver, is this correct? If not, how should these datastreams be dealt with?


After creating an Image in an empty folder and switching to thumbnail view, CbFsCreateFile is called for the file ‘Thumbs.db:encryptable’
Posted: 10/23/2007 04:54:57
by Volodymyr Zinin (EldoS Corp.)

It's our mistake. Sorry. If you don't set a pointer to the CbFsEnumerateNamedStreamsEvent then the alternate data streams must be processed internally by the driver (it simply completes such request with STATUS_NOT_IMPLEMENTED). But there is a problem here. In the following build it will be fixed. Now for such requests (i.e. for Create('thumbs.db:encryptable') etc.) you can return the ERROR_NOT_IMPLEMENTED error.



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