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Software components for data protection, secure storage and transfer

Hash fo Openfile

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.
#33944
Posted: 07/08/2015 06:03:28
by byeong hun choi (Basic support level)
Joined: 07/06/2015
Posts: 2

hi there.

I tested CallbackFilter's EncryptXOR sample.
and I Add a CheckSome Logic there.

I used ControlFilter's OpenFile To Open and Calcurate MD5.
also I can get Hash of File(md5).

But Performace is very low.

Could help me some advice to fix the Issue.
#33945
Posted: 07/08/2015 06:09:54
by Eugene Mayevski (EldoS Corp.)

Please see this article. It is about Callback File System but the principle is the same.

Also when you open the file and calculate its checksum, you read the whole file. This operation does take time, especially when you need to open many files at once (eg. when you open the directory with Explorer, which opens all files in the directory) or when the file is large. There's no easy way to address this problem.


Sincerely yours
Eugene Mayevski

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