Author :
Nick Mathewson
Date :
2010-03-04 01:13:51
Hash :71fc3eb0 Message :Seed the RNG using sysctl() as well as /dev/urandom
William Ahern points out that if the user has chrooted, they might not
have a working /dev/urandom. Linux and many of the BSDs, however,
define a sysctl interface to their kernel random number generators.
This patch takes a belt-and-suspenders approach and tries to do use the
sysctl _and_ the /dev/urandom approach if both are present. When using
the sysctl approach, it tries to bulletproof itself by checking to make
sure that the buffers are actually set by the sysctl calls.
Nick Mathewson