[Boost-bugs] [Boost C++ Libraries] #7506: unique_path Fails on Windows for Temporary User Profiles

Subject: [Boost-bugs] [Boost C++ Libraries] #7506: unique_path Fails on Windows for Temporary User Profiles
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-10-15 13:35:13

#7506: unique_path Fails on Windows for Temporary User Profiles
------------------------------+---------------------------------------------
 Reporter:  steve@…           |       Owner:  bemandawes
     Type:  Bugs              |      Status:  new       
Milestone:  To Be Determined  |   Component:  filesystem
  Version:  Boost 1.51.0      |    Severity:  Problem   
 Keywords:                    |  
------------------------------+---------------------------------------------
 boost::filesystem::unique_path is failing on Windows if the user has a
 temporary (read-only) profile (e.g. guest account).
 I have tracked the problem down to a failure in
 libs/filesystem/src/unique_path.cpp when it calls CryptAcquireContextW.

 CryptAcquireContextW is failing with the arguments used. It appears that
 this is by design, for read-only profiles. See
 [http://blogs.msdn.com/b/alejacma/archive/2007/10/23

 /rsacryptoserviceprovider-fails-when-used-with-mandatory-profiles.aspx]
 for some background information.

 I have modified the dwFlags argument of both calls to
 CryptAcquireContextW, adding CRYPT_VERIFYCONTEXT | CRYPT_SILENT and it is
 now working for me.
 I'm no expert on the Win32 crypto API so I'm not sure if this is a valid
 solution in all contexts.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7506>
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