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193c16a364
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Filippo Valsorda 193c16a364 crypto/elliptic: reduce subtraction term to prevent long busy loop 
If beta8 is unusually large, the addition loop might take a very long
time to bring x3-beta8 back positive.

This would lead to a DoS vulnerability in the implementation of the
P-521 and P-384 elliptic curves that may let an attacker craft inputs
to ScalarMult that consume excessive amounts of CPU.

This fixes CVE-2019-6486.

Fixes #29903

Change-Id: Ia969e8b5bf5ac4071a00722de9d5e4d856d8071a
Reviewed-on: https://team-review.git.corp.google.com/c/399777
Reviewed-by: Adam Langley <agl@google.com>
Reviewed-by: Julie Qiu <julieqiu@google.com>
Reviewed-on: https://go-review.googlesource.com/c/159218
Reviewed-by: Julie Qiu <julie@golang.org>
2019-01-23 22:01:56 +00:00
.github .github: don't render author-facing text in ISSUE_TEMPLATE 2018-11-02 04:47:34 +00:00
api api: add os.(*File).SyscallConn to go1.12.txt 2019-01-02 21:21:53 +00:00
doc doc: mention 'go get golang.org/dl/...' in install 2019-01-23 16:07:39 +00:00
lib/time lib/time: update tzdata to 2018i 2019-01-07 20:14:03 +00:00
misc cmd/cgo: don't replace newlines with semicolons in expressions 2019-01-18 03:25:40 +00:00
src crypto/elliptic: reduce subtraction term to prevent long busy loop 2019-01-23 22:01:56 +00:00
test cmd/compile: don't bother compiling functions named "_" 2019-01-22 22:06:11 +00:00
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AUTHORS A+C: change email address for Elias Naur 2019-01-23 15:05:26 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS A+C: change email address for Elias Naur 2019-01-23 15:05:26 +00:00
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README.md

The Go Programming Language

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

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Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.

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To contribute, please read the contribution guidelines: https://golang.org/doc/contribute.html

Note that the Go project uses the issue tracker for bug reports and proposals only. See https://golang.org/wiki/Questions for a list of places to ask questions about the Go language.