Difference between revisions of "Hiberfil.sys"

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m (Got the date wrong for the WSPP release)
(Better reference to MS-DRSR, note about pseudocode errors.)
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hiberfil.sys is the file used by default by Microsoft Windows to save the machine's state as part of the [[hibernation]] process. The operating system also keeps an open file handle to this file, so no user, including the Administrator, can read the file while the system is running.
 
hiberfil.sys is the file used by default by Microsoft Windows to save the machine's state as part of the [[hibernation]] process. The operating system also keeps an open file handle to this file, so no user, including the Administrator, can read the file while the system is running.
  
Although most of the data structures required to parse the file format are available in the [[Microsoft Windows]] debug symbols, the compression used (Xpress) was undocumented until it was reverse engineered by [[Matthieu Suiche]] and [[Nicolas Ruff]]. Currently, [http://sandman.msuiche.net/ Sandman] is the only tool that can read the Windows hibernation file.
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Although most of the data structures required to parse the file format are available in the [[Microsoft Windows]] debug symbols, the compression used (Xpress) was undocumented until it was reverse engineered by [[Matthieu Suiche]] and [[Nicolas Ruff]]. Currently, [http://sandman.msuiche.net/ Sandman] is the only open-source tool that can read the Windows hibernation file.
  
In early 2008, as part of the [http://msdn.microsoft.com/en-us/library/cc197979.aspx Windows Server Protocol Program], Microsoft released documentation on the Xpress compression algorithm in the [http://download.microsoft.com/download/a/e/6/ae6e4142-aa58-45c6-8dcf-a657e5900cd3/%5BMS-DRSR%5D.pdf Directory Replication Service (DRS) Remote Protocol] specification.
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In early 2008, as part of the [http://msdn.microsoft.com/en-us/library/cc197979.aspx Windows Server Protocol Program], Microsoft released documentation on the Xpress compression algorithm in the [http://download.microsoft.com/download/a/e/6/ae6e4142-aa58-45c6-8dcf-a657e5900cd3/%5BMS-DRSR%5D.pdf Directory Replication Service (DRS) Remote Protocol] specification (section 4.1.10.6.15, "DecompressWin2k3"). However, the pseudocode given contains numerous errors, as documented by [[Matthieu Suiche]] in a [http://www.msuiche.net/2008/04/06/few-words-about-microsoft-interoperability-initiative/ blog entry].

Revision as of 09:04, 30 June 2008

hiberfil.sys is the file used by default by Microsoft Windows to save the machine's state as part of the hibernation process. The operating system also keeps an open file handle to this file, so no user, including the Administrator, can read the file while the system is running.

Although most of the data structures required to parse the file format are available in the Microsoft Windows debug symbols, the compression used (Xpress) was undocumented until it was reverse engineered by Matthieu Suiche and Nicolas Ruff. Currently, Sandman is the only open-source tool that can read the Windows hibernation file.

In early 2008, as part of the Windows Server Protocol Program, Microsoft released documentation on the Xpress compression algorithm in the Directory Replication Service (DRS) Remote Protocol specification (section 4.1.10.6.15, "DecompressWin2k3"). However, the pseudocode given contains numerous errors, as documented by Matthieu Suiche in a blog entry.