linux/arch/s390
Harald Freudenberger d34b1acb78 s390/prng: Adjust generation of entropy to produce real 256 bits.
The generate_entropy function used a sha256 for compacting
together 256 bits of entropy into 32 bytes hash. However, it
is questionable if a sha256 can really be used here, as
potential collisions may reduce the max entropy fitting into
a 32 byte hash value. So this batch introduces the use of
sha512 instead and the required buffer adjustments for the
calling functions.

Further more the working buffer for the generate_entropy
function has been widened from one page to two pages. So now
1024 stckf invocations are used to gather 256 bits of
entropy. This has been done to be on the save side if the
jitters of stckf values isn't as good as supposed.

Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-01-31 10:46:10 +01:00
..
appldata Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
boot Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
configs s390: update defconfigs 2017-01-16 07:27:48 +01:00
crypto s390/prng: Adjust generation of entropy to produce real 256 bits. 2017-01-31 10:46:10 +01:00
hypfs s390: hypfs: make inode explicitly non-modular 2016-10-31 17:55:40 +01:00
include s390: provide sclp based boot console 2017-01-16 07:27:55 +01:00
kernel s390: provide sclp based boot console 2017-01-16 07:27:55 +01:00
kvm s390: remove couple of unneeded semicolons 2017-01-16 07:27:54 +01:00
lib s390/lib: improve memmove, memset and memcpy 2017-01-16 07:27:51 +01:00
mm s390: remove couple of unneeded semicolons 2017-01-16 07:27:54 +01:00
net s390/bpf: remove redundant check for non-null image 2017-01-16 07:27:55 +01:00
numa s390/numa: pin all possible cpus to nodes early 2016-12-07 07:23:33 +01:00
oprofile s390/dumpstack: restore reliable indicator for call traces 2016-10-17 14:44:30 +02:00
pci s390/pci: use proper endianness annotations 2017-01-16 07:27:53 +01:00
tools s390: remove unneeded dependency for gen_facilities 2016-11-08 10:30:28 +01:00
defconfig s390: update defconfigs 2017-01-16 07:27:48 +01:00
Kbuild s390/numa: add core infrastructure 2015-08-03 18:40:25 +02:00
Kconfig Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2016-12-13 16:33:33 -08:00
Kconfig.debug s390: provide sclp based boot console 2017-01-16 07:27:55 +01:00
Makefile s390: add assembler include path for vx-insn.h 2016-09-06 11:00:04 +02:00