Fixes golang/go#61963

Change-Id: I16920d160af74772ef5aa650d1274e07c3ca9adc
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/562475
Reviewed-by: Filippo Valsorda <filippo@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

on RHEL 9 OpenSSH does not support DSA keys and RSA keys with size less
than 2048 bits, furthermore signing with ssh-rsa (SHA-1 signatures) and
ssh-dss is not allowed, therefore:

1) replaced the 1024-bit RSA key used in the test with a new 2048-bit
   one
2) removed DSA key from itegration tests
3) allowed signature errors using ssh-rsa in agent integration tests, we
   also check SHA-2 variants that are not skipped

Fixes golang/go#65581

Change-Id: I54bf997b61ef4d91d38eb624275737ba7291bb20
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/562755
Reviewed-by: Roland Shoemaker <roland@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Auto-Submit: Nicola Murino <nicola.murino@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

This contains a few minor improvements to sum_ppc64le.s
which result in up to 10% performance improvement for
some of the benchmarks in this directory.

- ADDZE followed by ADD can be combined into ADDE
- PCALIGN added to the loop
- Eliminate a few unnecessary register moves

goos: linux
goarch: ppc64le
pkg: golang.org/x/crypto/internal/poly1305
cpu: POWER10
                 │ poly.orig.out │              poly.out              │
                 │    sec/op     │   sec/op     vs base               │
64                   40.34n ± 0%   38.13n ± 0%   -5.47% (p=0.002 n=6)
1K                   482.2n ± 0%   444.6n ± 0%   -7.81% (p=0.002 n=6)
2M                   978.4µ ± 0%   879.3µ ± 0%  -10.12% (p=0.002 n=6)
64Unaligned          40.35n ± 0%   38.16n ± 0%   -5.42% (p=0.002 n=6)
1KUnaligned          482.0n ± 0%   444.2n ± 0%   -7.84% (p=0.002 n=6)
2MUnaligned          978.4µ ± 0%   879.4µ ± 0%  -10.12% (p=0.002 n=6)
Write64              32.69n ± 0%   30.71n ± 0%   -6.04% (p=0.002 n=6)
Write1K              472.4n ± 0%   436.5n ± 0%   -7.60% (p=0.002 n=6)
Write2M              978.3µ ± 0%   879.4µ ± 0%  -10.11% (p=0.002 n=6)
Write64Unaligned     32.67n ± 0%   30.71n ± 0%   -6.00% (p=0.002 n=6)
Write1KUnaligned     472.6n ± 0%   436.4n ± 0%   -7.66% (p=0.002 n=6)
Write2MUnaligned     978.5µ ± 0%   879.6µ ± 0%  -10.10% (p=0.002 n=6)
geomean              2.569µ        2.367µ        -7.87%

Change-Id: I63314e7252ef10fb2d157f623c4bc2e31a63ae32
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/558775
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Paul Murphy <murp@ibm.com>
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>

Style fix: iota shouldn't be used for values that come from RFCs or
things that go over the wire or to disk.

Change-Id: Ib903ec1bce7e71ff81094db3de8d0b71e16f52f3
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/564695
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Roland Shoemaker <roland@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>

Not necessary for anything, but need to test something harmless.

Change-Id: I4faa64ef2c8f1f14df5ccaa37836fc56beed4f50
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/566917
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>