CVS: cvs.openbsd.org: src

[Otto Moerbeek <otto_(_at_)_cvs_(_dot_)_openbsd_(_dot_)_org>]

CVSROOT:	/cvs
Module name:	src
Changes by:	otto_(_at_)_cvs_(_dot_)_openbsd_(_dot_)_org	2008/03/16 13:47:43

Modified files:
	lib/libc/crypt : arc4random.3 arc4random.c 
	include        : stdlib.h 

Log message:
diff from djm@ committed at his request:

introduce two new APIs for requesting strong random numbers:

arc4random_buf() - fill an arbitrary memory range with random numbers

arc4random_uniform() - return a uniformly distributed random number
below
a specified upper bound, avoiding the bias that comes from a naive
"arc4random() % upper_bound" construction.

these mirror similarly-named functions in the kernel;
lots of discussion deraadt@ mcbride@