openbsd/src/lib/libc/crypt/arc4random.c, branch pre_openssl_0_9_8hA mirror of https://github.com/libressl/openbsd.git
https://git.lua4.win/openbsd/atom?h=pre_openssl_0_9_8h2008-07-28T23:44:12+00:00This commit was manufactured by cvs2git to create tag 'pre_openssl_0_9_8h'.2008-07-28T23:44:12+00:00cvs2svnadmin@example.com2008-07-28T23:44:12+00:00urn:sha1:daac2f633f49a45baa8412c5e4e71e594236e7b8fix math screwup that reintroduced a bias for upper_bounds in range2008-06-04T00:50:23+00:00djm2008-06-04T00:50:23+00:00urn:sha1:9cb2819066edcb7bd907e9809cc6a87dbf7b3a71
(2^30,2^31). Nothing in the tree yet requests random numbers bounded
by this range.
report jakob!deraadt; ok deraadt@
diff from djm@ committed at his request:2008-03-16T19:47:43+00:00otto2008-03-16T19:47:43+00:00urn:sha1:e045e819cf6c3f1795515c3f3f6d661b69e1f66b
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@
- make arc4random*() functions thread safe. Use a custom spinlock function2008-01-01T00:43:39+00:00kurt2008-01-01T00:43:39+00:00urn:sha1:d08c4e4910d78ef0ddd9e7917c1f2d61b0021d4a
instead of the generic pthread macros since free(3) uses __arc4_getbyte()
when freeing small sized allocations and the generic pthread macros call
malloc(3).
- eliminate passing pointers to a static variable with global scope (rs)
for additional code clarity and reduction.
- shlib minor bumps for libc and libpthread due to new functions.
From andreas@ with some bits from me. okay tedu@ marc@ w/some spot
checking from millert@
provide an libc internal interface to get random bytes, to be used by malloc2007-02-12T19:58:47+00:00otto2007-02-12T19:58:47+00:00urn:sha1:69c771d75d0fc0fe568375eaf8269d6afa45d501
to get random data without calling getpid(), ok millert@ deraadt@
Use sysctl(KERN_ARND) to get n bytes, instead of just 4 at a time2005-11-30T07:51:02+00:00otto2005-11-30T07:51:02+00:00urn:sha1:f8452f05564b5820c3745b9348d85a2b3a745467
and remove fallback code. If somebody is dumb enough to make the
sysctl fail using systrace, he deserves what he gets. Saves 7 syscalls
on process startup.
looks good miod@ ok deraadt@ tedu@
Change email address for author, at his request.2005-06-06T14:57:59+00:00kjell2005-06-06T14:57:59+00:00urn:sha1:4128e973a85b96d70a30e67b8c644cd546701184Change license to standard OpenBSD boilerplate, with permission2005-06-06T04:54:28+00:00kjell2005-06-06T04:54:28+00:00urn:sha1:516b96d165d2931f862a17d19a86fb40ea0aea50
from original author (David Mazieres)
use the new fat random sysctl to get initial state. (fallback to looping).2005-06-04T05:13:13+00:00tedu2005-06-04T05:13:13+00:00urn:sha1:26efa7c2a86f35a1ee66b7060085328402a5ac4d
stir after eating 400000 words. ok + input deraadt
kill spaces2004-11-02T11:07:13+00:00hshoexer2004-11-02T11:07:13+00:00urn:sha1:3d26b52fa07481c5e5ea45aadb74ca49ad7d2ea1
ok djm@