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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 44881] New: libapr uses /dev/ random as default entropy source on Linux systems
Date Sat, 26 Apr 2008 15:11:26 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=44881

           Summary: libapr uses /dev/random as default entropy source on
                    Linux systems
           Product: APR
           Version: HEAD
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P2
         Component: APR
        AssignedTo: bugs@apr.apache.org
        ReportedBy: alexanderv@gmx.net


Using /dev/random as entropy source on Linux systems without a hardware RNG is
generally not a good idea since /dev/random blocks if the system cannot gather
enough entropy. This may result in severe performance degradation for
applications that use libapr. An example is Subversion on many Linux
distributions.

http://subversion.tigris.org/issues/show_bug.cgi?id=2590
http://subversion.tigris.org/faq.html#slow-private-svnserve

There seems to be no evidence that /dev/urandom will produce more insecure
random data than /dev/random for most practical purposes. So /dev/urandom would
be a more reasonable default for the APR on Linux.


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