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Michael Munday 3b8a031569 crypto/elliptic: fix incomplete addition used in CombinedMult on s390x
This applies the amd64-specific changes from CL 42611 to the s390x P256
implementation. The s390x implementation was disabled in CL 62292 and
this CL re-enables it.

Adam Langley's commit message from CL 42611:

The optimised P-256 includes a CombinedMult function, which doesn't do
dual-scalar multiplication, but does avoid an affine conversion for
ECDSA verification.

However, it currently uses an assembly point addition function that
doesn't handle exceptional cases.

Fixes #20215.

Change-Id: I2f6b532f495e85b8903475b4f64cc32a3b2f6769
Reviewed-on: https://go-review.googlesource.com/64290
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
2017-10-05 17:49:00 +00:00
.github .github: update ISSUE_TEMPLATE to be closer to 'go bug' 2017-08-19 04:06:10 +00:00
api doc, api: add syscall.SysProcAttr.AmbientCaps change to 1.9 notes, API 2017-06-29 03:29:46 +00:00
doc doc: add missing "Minor revisions" header for 1.9 2017-10-04 20:22:15 +00:00
lib/time time: vendor tzdata-2017b and update test 2017-06-07 21:23:58 +00:00
misc cmd/link: type symbol name mangling for plugins 2017-10-05 09:51:31 +00:00
src crypto/elliptic: fix incomplete addition used in CombinedMult on s390x 2017-10-05 17:49:00 +00:00
test cmd/compile: fix merge rules for panic calls 2017-10-03 09:27:37 +00:00
.gitattributes
.gitignore .gitignore: include only Go project artifiacts 2017-08-15 21:37:05 +00:00
AUTHORS A+C: final updates for Go 1.9 2017-07-18 01:47:54 +00:00
CONTRIBUTING.md .github: recommend 'go bug' when filing an issue 2017-07-24 17:18:34 +00:00
CONTRIBUTORS A+C: final updates for Go 1.9 2017-07-18 01:47:54 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
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README.md readme: add attribution for the Gopher image 2017-02-03 19:39:41 +00:00
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