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5 Commits

Author SHA1 Message Date
Conrad Meyer
7d93ab5e35 Embedded chacha: Add 0-bit iv + 128-bit counter mode 
This mode might be suitable for a Fortuna keystream primitive.

Reviewed by:	markm
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D19410
 2019-03-01 23:30:23 +00:00
Conrad Meyer
243e09430a Embedded chacha: Distinguish via dedicated macro 
Set embedding expectations via CHACHA_EMBED macro rather than _KERNEL
definition.

No functional change.

Sponsored by:	Dell EMC Isilon
 2018-10-20 22:14:29 +00:00
Conrad Meyer
addfc6364f crypto/chacha: Split header into separate _chacha.h 
Sponsored by:	Dell EMC Isilon
 2018-10-20 22:12:53 +00:00
Xin LI
c1e80940f3 Update userland arc4random() with OpenBSD's Chacha20 based arc4random(). 
ObsoleteFiles.inc:

    Remove manual pages for arc4random_addrandom(3) and
    arc4random_stir(3).

  contrib/ntp/lib/isc/random.c:
  contrib/ntp/sntp/libevent/evutil_rand.c:

    Eliminate in-tree usage of arc4random_addrandom().

  crypto/heimdal/lib/roken/rand.c:
  crypto/openssh/config.h:

    Eliminate in-tree usage of arc4random_stir().

  include/stdlib.h:

    Remove arc4random_stir() and arc4random_addrandom() prototypes,
    provide temporary shims for transistion period.

  lib/libc/gen/Makefile.inc:

    Hook arc4random-compat.c to build, add hint for Chacha20 source for
    kernel, and remove arc4random_addrandom(3) and arc4random_stir(3)
    links.

  lib/libc/gen/arc4random.c:

    Adopt OpenBSD arc4random.c,v 1.54 with bare minimum changes, use the
    sys/crypto/chacha20 implementation of keystream.

  lib/libc/gen/Symbol.map:

    Remove arc4random_stir and arc4random_addrandom interfaces.

  lib/libc/gen/arc4random.h:

    Adopt OpenBSD arc4random.h,v 1.4 but provide _ARC4_LOCK of our own.

  lib/libc/gen/arc4random.3:

    Adopt OpenBSD arc4random.3,v 1.35 but keep FreeBSD r114444 and
    r118247.

  lib/libc/gen/arc4random-compat.c:

    Compatibility shims for arc4random_stir and arc4random_addrandom
    functions to preserve ABI.  Log once when called but do nothing
    otherwise.

  lib/libc/gen/getentropy.c:
  lib/libc/include/libc_private.h:

    Fold __arc4_sysctl into getentropy.c (renamed to arnd_sysctl).
    Remove from libc_private.h as a result.

  sys/crypto/chacha20/chacha.c:
  sys/crypto/chacha20/chacha.h:

    Make it possible to use the kernel implementation in libc.

PR:		182610
Reviewed by:	cem, markm
Obtained from:	OpenBSD
Relnotes:	yes
Differential Revision:	https://reviews.freebsd.org/D16760
 2018-08-19 17:40:50 +00:00
Mark Murray
150890b0c6 Replace the RC4 algorithm for generating in-kernel secure random 
numbers with Chacha20. Keep the API, though, as that is what the
other *BSD's have done.

Use the boot-time entropy stash (if present) to bootstrap the
in-kernel entropy source.

Reviewed by: delphij,rwatson
Approved by: so(delphij)
MFC after: 2 months
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D10048
 2017-04-16 09:11:02 +00:00