Change-Id: I3078492dc020770aca630e0b362df0212bd41e32
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/569156
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Nicola Murino <nicola.murino@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Nicola Murino <nicola.murino@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

- Adding PCALIGN before the loops
- Changing WORD directive with corresponding Vector Merge EVEN/ODD word  instructions
- Replacing Branch Conditional (BC) with its extended mnemonic form  BDNZ
- VPERMXOR instruction usage in place of VXOR instructions followed by
  VRLW (rotate left) for cases of rotating in multiples of 8. This
  replacements give performace improvement both in time and space  of around 7%-8% as listed below
  using benchstat tool.

goos: linux
goarch: ppc64le
pkg: golang.org/x/crypto/chacha20
cpu: POWER10
                 | chacha20.prev.out |       chacha20.new.out            |
                 |      sec/op       |   sec/op     vs base              |
ChaCha20/64              171.9n ± 0%   156.6n ± 1%  -8.90% (p=0.002 n=6)
ChaCha20/256             165.5n ± 0%   152.4n ± 0%  -7.92% (p=0.002 n=6)
ChaCha20/10x25           505.8n ± 0%   504.3n ± 2%  -0.32% (p=0.589 n=6)
ChaCha20/4096            2.265µ ± 0%   2.052µ ± 0%  -9.40% (p=0.002 n=6)
ChaCha20/100x40          5.359µ ± 3%   5.018µ ± 2%  -6.37% (p=0.002 n=6)
ChaCha20/65536           35.71µ ± 0%   32.29µ ± 0%  -9.57% (p=0.002 n=6)
ChaCha20/1000x65         44.63µ ± 0%   41.05µ ± 0%  -8.02% (p=0.002 n=6)
geomean                  2.235µ        2.073µ       -7.26%

                 | chacha20.prev.out |          chacha20.new.out         |
                 |       B/s         |     B/s       vs base             |
ChaCha20/64             355.1Mi ± 0%   389.8Mi ± 1%   +9.78% (p=0.002 n=6)
ChaCha20/256            1.440Gi ± 0%   1.565Gi ± 0%   +8.62% (p=0.002 n=6)
ChaCha20/10x25          471.3Mi ± 0%   472.8Mi ± 2%   +0.31% (p=0.589 n=6)
ChaCha20/4096           1.684Gi ± 0%   1.859Gi ± 0%  +10.38% (p=0.002 n=6)
ChaCha20/100x40         711.8Mi ± 3%   760.3Mi ± 2%   +6.80% (p=0.002 n=6)
ChaCha20/65536          1.709Gi ± 0%   1.890Gi ± 0%  +10.59% (p=0.002 n=6)
ChaCha20/1000x65        1.356Gi ± 0%   1.475Gi ± 0%   +8.72% (p=0.002 n=6)
geomean                 957.3Mi        1.008Gi        +7.83%
Change-Id: Ib31cb10a2a11eacdacf0272fbfd887eb5ccd8bcb
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/564797
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Run-TryBot: Paul Murphy <murp@ibm.com>
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Reviewed-by: David Chase <drchase@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>

Add support for sending back partial success to the client while
handling authentication in the server. This is implemented by a special
error that can be returned by any of the authentication methods, which
contains the authentication methods to offer next.

This patch is based on CL 399075 with some minor changes and the
addition of test cases.

Fixes golang/go#17889
Fixes golang/go#61447
Fixes golang/go#64974

Co-authored-by: Peter Verraedt <peter.verraedt@kuleuven.be>
Change-Id: I05c8f913bb407d22c2e41c4cbe965e36ab4739b0
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/516355
Reviewed-by: Andrew Lytvynov <awly@tailscale.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Reviewed-by: Filippo Valsorda <filippo@golang.org>
Auto-Submit: Filippo Valsorda <filippo@golang.org>

Only the first "none" auth attempt is allowed without penality

Change-Id: Ibe776e968ba406445eeb94e8f1959383b88c98f7
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/575995
Reviewed-by: Filippo Valsorda <filippo@golang.org>
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Commit-Queue: Nicola Murino <nicola.murino@gmail.com>
Reviewed-by: Than McIntosh <thanm@google.com>

Update golang.org/x dependencies to their latest tagged versions.

Change-Id: Ib20227810c7e72942dd6fc33731fc613784aedec
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/576515
Reviewed-by: Than McIntosh <thanm@google.com>
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