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crypto/ecdh: provide and/or implement an interface #56052

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rautammi opened this issue Oct 5, 2022 · 20 comments
Closed

crypto/ecdh: provide and/or implement an interface #56052

rautammi opened this issue Oct 5, 2022 · 20 comments
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Proposal Proposal-Accepted Proposal-Crypto Proposal related to crypto packages or other security issues
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@rautammi
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rautammi commented Oct 5, 2022

I am very sorry for being very late with this one. Would it be possible to expose PrivateKey as an interface, allowing one to create implementations of Curve and PrivateKey which utilizes a static private key from an HSM for ECDH operation? Somewhat following the idiom from crypto.Signer.

@gopherbot gopherbot added this to the Proposal milestone Oct 5, 2022
@rautammi rautammi changed the title proposal: affected/package: crypto/ecdh Support for PKCS#11 proposal: crypto/ecdh: Support for PKCS#11 Oct 5, 2022
@ianlancetaylor ianlancetaylor added the Proposal-Crypto Proposal related to crypto packages or other security issues label Oct 5, 2022
@ianlancetaylor
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CC @golang/security

@ericlagergren
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@rautammi alternatively, APIs that need an ECDH private key could accept an interface instead of requiring *ecdh.PrivateKey. There is already crypto.PrivateKey and crypto.PublicKey.

@ericchiang
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For reference, go-piv has supported ECDH backed by a YubiKey for a while now:

https://pkg.go.dev/github.com/go-piv/piv-go/piv?utm_source=godoc#ECDSAPrivateKey.SharedKey

I don't think crypto/ecdh is the place to support this? E.g. crypto/rsa and crypto/ecdsa don't support out-of-process private keys. If there are packages that want to support both crypto/ecdh and external keys, that interface probably belongs with those packages or in the crypto package (like crypto.Signer/crypto.Decrypter)

@rautammi
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rautammi commented Oct 7, 2022

I think @ericchiang is right.
It has been awesome, that well-behaving packages are using crypto.Signer, allowing one to, for example, very easily add PKCS#11 support for TLS or SSH authentication, without any changes to those packages at all.
So, what we need, in addition to this crypto/ecdh, is some kind of crypto.Exchanger interface, which crypto/ecdh then implements, and which usage is recommended for any package agreeing shared secrets using a static private key.

@rautammi
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rautammi commented Oct 7, 2022

I would say the person who invented crypto.Signer was a genius! Let she or he design an equally generic and future proof interface for key exchange too.

@rsc
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rsc commented Oct 12, 2022

/cc @golang/security

@rsc
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rsc commented Oct 12, 2022

This proposal has been added to the active column of the proposals project
and will now be reviewed at the weekly proposal review meetings.
— rsc for the proposal review group

@FiloSottile
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I agree that it would be nice to have an interface type for key exchanges, and while it might be too late to come up with one for Go 1.20, we should make sure the crypto/ecdh package design is not hostile to one.

Looking forward, it would probably be appropriate for it to fit the shape of KEMs, to work with PQC KEMs.

A KEM has three operations: KeyGen, Encap, and Decap.

KeyGen() -> public key, secret key
Encapsulate(public key) -> ciphertext, shared key
Decapsulate(secret key, ciphertext) -> shared key

With crypto/ecdh,

  • KeyGen is ecdh.P256().GenerateKey()
  • Encap is ecdh.P256().GenerateKey() followed by ecdh.P256().ECDH(privateKey, peerPublicKey)
    • the ciphertext is just the generated public key
  • Decap is ecdh.P256().NewPublicKey() followed by ecdh.P256().ECDH(privateKey, peerPublicKey)

because ECDH is very symmetrical.

While thinking about this I also started having doubts on whether ECDH should be a method on Curve or on PrivateKey. My initial thinking was that a method on PrivateKey like KeyExchange(publicKey []byte) would make it possible for it to implement a Signer-like interface, but that only works for DH-like symmetrical KEMs that don't have a separate Encap and Decap. If we had such a method on PrivateKey, it would also make sense to move ECDH to PrivateKey.

I'd be interested to hear proposals for KEM-friendly interfaces, and how crypto/ecdh might implement them. I went through a few options but found none that I liked so far.

@FiloSottile FiloSottile changed the title proposal: crypto/ecdh: Support for PKCS#11 proposal: crypto/ecdh: provide and/or implement an interface Oct 19, 2022
@rautammi
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For existing PQC-KEMs, I think an interface would be very similar to crypto.Decrypter, And I would go as far as stating that it would not be too unintuitive to use crypto.Decrypter for that purpose.
But like @FiloSottile stated, ECDH is has a bit different properties, as is symmetric. And it would be applied in a different way. One cannot implement Noise framework's quad-ECDH using, for example, Kyber as a drop-in replacement.
I would vote for PrivateKey.KeyExchange(pubicKey []byte) as an interface for DH-like key exchanges.

@rsc
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rsc commented Oct 26, 2022

What would the API be specifically?

@rautammi
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rautammi commented Oct 27, 2022

type Exchanger interface {
    Public() crypto.PublicKey
    Exchange(peerPublic []byte, opts ExchangerOpts) (sharedSecret []byte, err error)
}
type ExchangerOpts any

Exchanger would be an opaque private key.
Maybe ExchangerOpts should implement HashFunc() crypto.Hash for passing the hash function to be used in whitening of the shared secret.

@rsc
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rsc commented Nov 2, 2022

Talked to @FiloSottile about this, and he believes we should move ECDH to the PrivateKey type, and then an interface can be defined (not necessarily in this package) that PrivateKey implements.

@rsc
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rsc commented Nov 9, 2022

To elaborate on my comment from last week, the idea is to take ecdh.PrivateKey, which already has Bytes, Curve, Equal, Public, and PublicKey methods, and move the ECDH method over there too. Then any hardware key can implement these methods, and code that wants to take either kind can define an interface listing the methods it needs. In this case we would not need to define an interface in the standard library.

Does anyone object to that approach?

@gopherbot
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Change https://go.dev/cl/450335 mentions this issue: crypto/ecdh: move ECDH method to PrivateKey

@gopherbot
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Change https://go.dev/cl/451095 mentions this issue: internal/wycheproof: update Go 1.20 crypto/ecdh API

gopherbot pushed a commit to golang/crypto that referenced this issue Nov 16, 2022
For golang/go#56052

Change-Id: If34d01132e221ff525319e43d127ef14579f9054
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/451095
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Joedian Reid <joedian@golang.org>
Auto-Submit: Filippo Valsorda <filippo@golang.org>
Run-TryBot: Filippo Valsorda <filippo@golang.org>
Run-TryBot: Joedian Reid <joedian@golang.org>
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@rsc
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rsc commented Nov 16, 2022

Reopening.

@rsc rsc reopened this Nov 16, 2022
@rsc
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rsc commented Nov 16, 2022

This was marked as closed by the CL that moved the ECDH method. Now it is possible to define an interface outside the standard library that ecdh.PrivateKey implements, and hardware keys can implement it too. So it seems like we don't need to add an interface to the standard library right now.

Do I have that right?

@FiloSottile
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Yeah, that sounds right to me. Eventually we might define a ECDH or KEM interface in the standard library if we need to consume it, but in the meantime hardware implementations can implement the PrivateKey methods and use their own interface.

Sorry for jumping the gun on the proposal process, I hadn't realized this wasn't accepted yet and I wanted to get the changes in before the freeze since crypto/ecdh is new in Go 1.20.

@rsc
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rsc commented Nov 30, 2022

Sounds like no one objects, and since the work is already done, I'll just move it to accepted and close it.

@rsc
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rsc commented Nov 30, 2022

No change in consensus, so accepted. 🎉
This issue now tracks the work of implementing the proposal.
— rsc for the proposal review group

@rsc rsc changed the title proposal: crypto/ecdh: provide and/or implement an interface crypto/ecdh: provide and/or implement an interface Nov 30, 2022
@rsc rsc modified the milestones: Proposal, Backlog Nov 30, 2022
@rsc rsc closed this as completed Nov 30, 2022
LewiGoddard added a commit to LewiGoddard/crypto that referenced this issue Feb 16, 2023
For golang/go#56052

Change-Id: If34d01132e221ff525319e43d127ef14579f9054
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/451095
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Joedian Reid <joedian@golang.org>
Auto-Submit: Filippo Valsorda <filippo@golang.org>
Run-TryBot: Filippo Valsorda <filippo@golang.org>
Run-TryBot: Joedian Reid <joedian@golang.org>
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@dmitshur dmitshur modified the milestones: Backlog, Go1.20 Jun 4, 2023
maisem pushed a commit to tailscale/golang-x-crypto that referenced this issue Jul 11, 2023
For golang/go#56052

Change-Id: If34d01132e221ff525319e43d127ef14579f9054
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/451095
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Joedian Reid <joedian@golang.org>
Auto-Submit: Filippo Valsorda <filippo@golang.org>
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BiiChris pushed a commit to BiiChris/crypto that referenced this issue Sep 15, 2023
For golang/go#56052

Change-Id: If34d01132e221ff525319e43d127ef14579f9054
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/451095
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Joedian Reid <joedian@golang.org>
Auto-Submit: Filippo Valsorda <filippo@golang.org>
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awly added a commit to tailscale/golang-x-crypto that referenced this issue Jan 8, 2024
* ocsp: add Response.Raw

Fixes golang/go#38340

Change-Id: I77afc901584ac3361eafa13c9ee9f8cf9ec2ee28
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/389256
Trust: Roland Shoemaker <roland@golang.org>
Run-TryBot: Roland Shoemaker <roland@golang.org>
Auto-Submit: Roland Shoemaker <roland@golang.org>
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Reviewed-by: Damien Neil <dneil@google.com>

* acme/autocert: support External Account Binding (EAB) tokens

Support External Account Binding (EAB) tokens to the Manager as defined
in RFC 8555, Section 7.3.4. If the ExternalAccountBinding field is set
on Manager, pass it into the acme Account during registration.

Fixes golang/go#48809

Change-Id: I64c38b05ab577acbde9f526638cc8104d15ff055
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/354189
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Trust: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Run-TryBot: Filippo Valsorda <filippo@golang.org>
Auto-Submit: Filippo Valsorda <filippo@golang.org>
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* all: gofmt

Gofmt to update doc comments to the new formatting.

For golang/go#51082.

Change-Id: I076031b6613691eefbb0f21739366e3fd2011ec9
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/399356
Run-TryBot: Russ Cox <rsc@golang.org>
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Auto-Submit: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>

* internal/wycheproof: add ECDH tests, including point decompression

Fixes golang/go#38936

Change-Id: I231d30fcc683abd9efb36b6fd9cc05f599078ade
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/396174
Run-TryBot: Filippo Valsorda <filippo@golang.org>
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Auto-Submit: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>

* internal/wycheproof: skip truncated SHA-512 RSAPSS tests for boring

On the boringcrypto builder, skip the RSAPSS tests that use the
truncated SHA-512 hashes, since boringcrypto does not support them.

Fixes #52670

Change-Id: I8caecd0f34eb6d2740372db2b641563e3965ac7c
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/404654
Run-TryBot: Roland Shoemaker <roland@golang.org>
Auto-Submit: Roland Shoemaker <roland@golang.org>
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Reviewed-by: Bryan Mills <bcmills@google.com>

* acme/autocert/internal/acmetest: don't validate in goroutine

In the test server, rather than spawning a goroutine to validate
challenges, block on the validation before responding to the client.
This prevents a test race, where testing.T.Logf is called after the
test is completed.

While this has a slight behavioral difference to some production
ACME server implementations (although is behavior allowed in the spec),
the change has little material impact on what we are testing, since
previously the validation would happen so quickly that it would be
indistinguishable from the new blocking behavior (i.e. we would not be
sending multiple requests during polling previously.)

Fixes golang/go#52170

Change-Id: I75e3b2da69ddc2302be25a99f1b1151ed0f4af9b
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/405548
Run-TryBot: Roland Shoemaker <roland@golang.org>
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Reviewed-by: Bryan Mills <bcmills@google.com>

* ssh/agent: fix non-RSA certificates

The type of ssh.PublicKey.Type can be a certificate type, while the
algorithm passed to SignWithAlgorithm is going to be an underlying
algorithm.

Fixes golang/go#52185

Change-Id: I0f7c46defa83d1fd64a3c1e861734650b20cca21
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/404614
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Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Auto-Submit: Filippo Valsorda <filippo@golang.org>
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* acme: add AccountKeyRollover

Add support for AccountKeyRollover. API only returns an error since acme.Error
will contain appropriate KID lookup information. Due to the requirements
of double JWS encoding jwsEncodeJSON is also modified to support a
missing Nonce header and raw string embedding in the payload.

Fixes golang/go#42516

Change-Id: I959660a1a39b2c469b959accd48fda519daf4eb3
GitHub-Last-Rev: 8e8cc5b094743262939c145f56d3a3b57a057d64
GitHub-Pull-Request: golang/crypto#215
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/400274
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Reviewed-by: Heschi Kreinick <heschi@google.com>
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* curve25519/internal/field: update generator to avo v0.4.0

This version generates //go:build lines.

For golang/go#46155

Change-Id: I23e4617aa96bc5c15c10f3cd0882028ca08e09e8
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/388874
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>

* acme: DeactivateReg fix panic

Currently discover is not called which results in a panic if just a key
is added to an ACME client and then deactivation is attempted.
This patch adds a discover call as well as missing unit tests for the
API.

Change-Id: I0719e5376eb2fccf62182e5f91e5b5eaa7bdd518
GitHub-Last-Rev: 501d7c6c1b75a3069dcad4254b4d4a0d2ccb02c8
GitHub-Pull-Request: golang/crypto#217
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/406734
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Auto-Submit: Roland Shoemaker <roland@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>
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Reviewed-by: Michael Knyszek <mknyszek@google.com>

* acme/autocert: properly clean DirCache paths

Don't assume the path passed into the DirCache methods is absolute, and
clean it before further operating on it. Put and Delete are not attacker
controlled, but clean them anyway.

Fixes #53082
Fixes CVE-2022-30636

Change-Id: I755f525a737da60ccba07ebce4d41cc8faebfcca
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/408694
Run-TryBot: Roland Shoemaker <roland@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
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* curve25519: remove dependency on fmt

For golang/go#48154

Change-Id: If7e99bd1159edc2e3deeb3a4e3d8fb048bc591ab
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/348069
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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* A+C: delete AUTHORS and CONTRIBUTORS

In 2009, Google's open-source lawyers asked us to create the AUTHORS
file to define "The Go Authors", and the CONTRIBUTORS file was in
keeping with open source best practices of the time.

Re-reviewing our repos now in 2022, the open-source lawyers are
comfortable with source control history taking the place of the
AUTHORS file, and most open source projects no longer maintain
CONTRIBUTORS files.

To ease maintenance, remove AUTHORS and CONTRIBUTORS from all repos.

For golang/go#53961.

Change-Id: Ieb32933de4f234c77f0131490d4081b6c336820c
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/419094
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Reviewed-by: David Chase <drchase@google.com>
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* internal/subtle: rename to internal/alias

This avoids an import conflict in code that needs to import
crypto/subtle as well.

CL 424194 does the same for the main repo.

Change-Id: Ic54cb62bbfdcf5c2cb6f15ac47075ee1c41981ad
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/424175
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Russ Cox <rsc@golang.org>

* acme: gofmt code with Go 1.19 gofmt

Change-Id: Ib0fd6fcfa358df2bdb820a512b73e7cdb34120f8
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/424174
Run-TryBot: Russ Cox <rsc@golang.org>
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* cryptobyte: add ReadUint64 and AddUint64

Fixes golang/go#53481.

Change-Id: Ic00eef498d1d3b5b0ca5c9c526fac7c26de30cf2
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/421014
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Reviewed-by: Roland Shoemaker <roland@golang.org>

* ssh/agent: match OpenSSH extensionAgentMsg, not IETF draft

The OpenSSH wire format just suffixes the raw extension body,
without a nested string.

Fixes golang/go#51689

Change-Id: Ic224cedb934ba0563abca9a45a6be1c67769ed6d
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/412154
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* internal/wycheproof: add crypto/ecdh tests

Alongside the existing ECDH tests, add tests that use the new
crypto/ecdh package. The test vectors include a number of private
that use non-standard sizes, which we reject, but aren't flagged,
so we need to skip them.

Change-Id: Iaaef225b0149a86833095f51748d230385d43bfe
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/424274
Reviewed-by: Russ Cox <rsc@golang.org>
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* all: replace io/ioutil with io and os package

For golang/go#45557

Change-Id: I447530cc66896aef7a8d528ccb8d095b80e3cf47
GitHub-Last-Rev: 5f385ff46487ac318bd1147cdbbd26bb0ffd0426
GitHub-Pull-Request: golang/crypto#230
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/430797
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Meng Zhuo <mzh@golangcn.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Cherry Mui <cherryyz@google.com>

* acme/autocert: fix renewal timer issue

Block when creating the renewal timer, rather than doing it in a
goroutine. This fixes an issue where startRenew and stopRenew are called
very closely together, and due to lock ordering, stopRenew may be called
before startRenew, resulting in the appearance that the renewal timer
has been stopped before it has actually been created.

This is only an issue in tests, as that is the only place stopRenew is
actually used. In particular this issue manifests in TestGetCertiifcate
sub-tests, where a httptest server reuses a port across two of the
sub-tests. In this case, the renewal calls end up creating dirty state
for the subsequent test, which can cause confusing behavior (such as
attempting to register an account twice.)

Another solution to this problem would be introducing a bool, protected
by renewalMu, which indicates if renewal has been halted, and to check
it in startRenew to check if stopRenew has already been called, which
would allow us to continue calling startRenew in a goroutine and relying
on renewalMu locking for ordering. That said I don't see a particularly
strong reason to call startRenew concurrently, so this seems like the
simplest solution for now.

Fixes golang/go#52494

Change-Id: I95420d3fd877572a0b9e408d2f8cd353f6a4e80e
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/433016
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* acme/autocert: remove TestRenewFromCache skips

Removes the skips from TestRenewFromCache and
TestRenewFromCacheAlreadyRenewed, which were added due to flakes which
may have been fixed by the renewal timer change.

Updates golang/go#51080

Change-Id: Ib953a24e610e89dfbbea450a4c257c105055ce7e
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/433815
Run-TryBot: Roland Shoemaker <roland@golang.org>
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Reviewed-by: Bryan Mills <bcmills@google.com>

* all: replace bytes.Compare with bytes.Equal

Change-Id: I911366b91ff2a1d02d7de202a166d876fb873142
GitHub-Last-Rev: f50e00376856fb9da36bb98ed0cdfd96c2f3b304
GitHub-Pull-Request: golang/crypto#233
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* ssh: add ServerConfig.NoClientAuthCallback

It was possible to accept auth type "none" before, but not dynamically
at runtime as a function of the ConnMetadata like the other auth types'
callback hooks.

Fixes golang/go#51994

Change-Id: I83ea80901d4977d8f78523e3d1e16e0a7df5b172
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/395314
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* all: fix a few function names on comments

Change-Id: Iac9c8f06b874e62b56f634dede8757b87514f421
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* all: use automatic RFC linking

pkgsite automatically links /RFC \d+/ to the mentioned RFC. Insert a
bunch of spaces into doc-comments for that to match.

Change-Id: I01834d7573428563f21c37e43316442e148dd8c4
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/442055
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* go.mod: update golang.org/x dependencies

Update golang.org/x dependencies to their latest tagged versions.
Once this CL is submitted, and post-submit testing succeeds on all
first-class ports across all supported Go versions, this repository
will be tagged with its next minor version.

Change-Id: If840eea1cadc749ce55efd88eb7d9fc38472839e
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* all: use math/bits.RotateLeft

Updates golang/go#31456

Change-Id: Idf043a25632526baa190bf42ed360cb79f85e493
GitHub-Last-Rev: 59461578926a85a87cc68dac96c0b7559766b7cf
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* ssh: fix typo

Change-Id: I560d7f5a62161cd88361a9fe9982d36f8e25e5af
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* go.mod: update golang.org/x dependencies

Update golang.org/x dependencies to their latest tagged versions.
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will be tagged with its next minor version.

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* all: remove redundant type conversion

Change-Id: Ic6b210c1e5b99eef5c6e38d96feaf40e7e6033bb
GitHub-Last-Rev: b8ecf761efe6a2eec78a805a99d778bdcdb938f9
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* ssh: support rsa-sha2-256/512 on the server side

This lets clients know we support rsa-sha2-256/512 signatures from
ssh-rsa public keys. OpenSSH prefers to break the connection rather than
attempting trial and error, apparently.

We don't enable support for the "ext-info-s" because we're not
interested in any client->server extensions.

This also replaces isAcceptableAlgo which was rejecting the
rsa-sha2-256/512-cert-v01@openssh.com public key algorithms.

Tested with OpenSSH 9.1 on macOS Ventura.

Fixes golang/go#49269
Updates golang/go#49952

Co-authored-by: Nicola Murino <nicola.murino@gmail.com>
Co-authored-by: Kristin Davidson <kdavidson@atlassian.com>
Change-Id: I4955c3b12bb45575e9977ac657bb5805b49d00c3
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* internal/wycheproof: update Go 1.20 crypto/ecdh API

For golang/go#56052

Change-Id: If34d01132e221ff525319e43d127ef14579f9054
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* cryptobyte: add support for ReadASN1Integer into []byte

This lets us extract large integers without involving math/big.

While at it, drop some use of reflect where a type switch will do.

Change-Id: Iebe2fb2267610bf95cf9747ba1d49b5ac9e62cda
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* go.mod: update golang.org/x dependencies

Update golang.org/x dependencies to their latest tagged versions.
Once this CL is submitted, and post-submit testing succeeds on all
first-class ports across all supported Go versions, this repository
will be tagged with its next minor version.

Change-Id: If72a913d54ec282d75e270409971b148df4b417c
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* acme: eliminate arbitrary timeouts in tests

Fixes golang/go#57107.

Change-Id: I20b1f6ca85170c6b4731d7c7ea06f4db742526cc
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* ssh: ensure that handshakeTransport goroutines have finished before Close returns

This fixes a data race in the tests for x/crypto/ssh, which expects to
be able to examine a transport's read and write counters without
locking after closing it.

(Given the number of goroutines, channels, and mutexes used in this
package, I wouldn't be surprised if other concurrency bugs remain.
I would suggest simplifying the concurrency in this package, but I
don't intend to follow up on that myself at the moment.)

Fixes golang/go#56957.

Change-Id: Ib1f1390b66707c66a3608e48f3f52483cff3c1f5
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* internal/wycheproof: also use Verify in TestECDSA

Check both Verify and VerifyASN1 in the ECDSA tests.

Change-Id: Id767354484a7da18ae4e00cd6f2a01a2909e6732
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* bcrypt: reject passwords longer than 72 bytes

By design, bcrypt only uses the first 72 bytes of a password when
generating a hash. Most implementations, including the reference one,
simply silently ignore any trailing input when provided passwords longer
than 72 bytes. This can cause confusion for users who expect the entire
password to be used to generate the hash.

In GenerateFromPassword, reject passwords longer than 72 bytes.
CompareHashAndPassword will still accept these passwords, since we
cannot break hashes that have already been stored.

Fixes golang/go#36546

Change-Id: I039addd2a2961a7fa9d1e4a3e892a9e3c8bf4c9a
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/450415
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* go.mod: update golang.org/x dependencies

Update golang.org/x dependencies to their latest tagged versions.
Once this CL is submitted, and post-submit testing succeeds on all
first-class ports across all supported Go versions, this repository
will be tagged with its next minor version.

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* all: fix some comments

Change-Id: I11030ee466c8cac6855ce4fe2cf72e0b8d7029f8
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* cryptobyte: reject negative Unwrite argument

Fixes golang/go#57112

Change-Id: I7a533046a6451d7ae3704eb81e6ddeec8442cf06
GitHub-Last-Rev: 3b088d95a2feca197cc4ebd1d9d34cb28008349f
GitHub-Pull-Request: golang/crypto#249
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* go.mod: update golang.org/x dependencies

Update golang.org/x dependencies to their latest tagged versions.
Once this CL is submitted, and post-submit testing succeeds on all
first-class ports across all supported Go versions, this repository
will be tagged with its next minor version.

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* ssh: add support for aes256-gcm@openssh.com

Change-Id: I91caf3bda3dfd00c050f5ebf23c2a35a04c5762b
GitHub-Last-Rev: 6e71340e7960b5b6f71f7b96eeeaf8dfb268e306
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* go.mod: update golang.org/x dependencies

Update golang.org/x dependencies to their latest tagged versions.
Once this CL is submitted, and post-submit testing succeeds on all
first-class ports across all supported Go versions, this repository
will be tagged with its next minor version.

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* ssh: document that ParseRawPrivateKey supports Ed25519 keys

From CL 173457 and CL 235358.

Change-Id: Ia46ab9c7e2c57472df3126ddc7050f0068fcaab9
GitHub-Last-Rev: c38e379355602fe4ff11ff65f98c296d5c326281
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* curve25519: use crypto/ecdh on Go 1.20

For golang/go#52221

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* all: fix some comments

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* go.mod: update golang.org/x dependencies

Update golang.org/x dependencies to their latest tagged versions.
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first-class ports across all supported Go versions, this repository
will be tagged with its next minor version.

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* cryptobyte: reject Object Identifiers with leading 0x80

Change-Id: Ie3a1b53e801077cd86963799e644b9783943933c
GitHub-Last-Rev: 6629bd74f1874eb9fde8e72bfb444ebf9073a1ab
GitHub-Pull-Request: golang/crypto#255
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* ssh/test: skip TestValidTerminalMode on non-Bourne shells

Fixes golang/go#38037.

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* ssh: skip unsupported tests on wasip1

Updates golang/go#32840
Updates golang/go#58141

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* ssh/test: enable on solaris

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* go.mod: update golang.org/x dependencies

Update golang.org/x dependencies to their latest tagged versions.
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* Add support for "hmac-sha2-512-etm@openssh.com"

Change-Id: I0203881afd7ad72e68f76650817451d7e292c91b
GitHub-Last-Rev: 42b4119e1987e7a46aa06a2b142d5fd3ef6f216a
GitHub-Pull-Request: golang/crypto#129
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* x509roots: add new module

Adds the nss parser, under x509roots/nss, and the fallback
module/package, with the initial generated bundle.

Fixes golang/go#57792

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* go.mod: tell x repo tagging to ignore dep on net

CL 475438 introduced a cycle between net and crypto. This direction is
less important, so have the tagging process ignore it.

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* go.mod: update golang.org/x dependencies

Update golang.org/x dependencies to their latest tagged versions.
Once this CL is submitted, and post-submit testing succeeds on all
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will be tagged with its next minor version.

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* ssh/test: set a timeout and WaitDelay on sshd subcommands

This uses a copy of testenv.Command copied from the main repo, with
light edits to allow the testenv helpers to build with Go 1.19.

The testenv helper revealed an exec.Command leak in TestCertLogin, so
we also fix that leak and simplify server cleanup using
testing.T.Cleanup.

For golang/go#60099.
Fixes golang/go#60343.

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* x509roots: use "generate" build tag

Since go generate sets it automatically.

Change-Id: I4623e523392140c0472b250ac99c8c3fa31e5b15
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/504595
Auto-Submit: Roland Shoemaker <roland@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Roland Shoemaker <roland@golang.org>

* x509roots: fix generate script argument checking

Check for supply of both arguments forgot that the URL is set by
default. Instead just let the local path supersede the URL.

Change-Id: I0499137c99c735e8e453ff1c2a925435f3cd8039
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/504596
Run-TryBot: Roland Shoemaker <roland@golang.org>
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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* x509roots: remove list hash and generation date, change ordering

This makes the automated update workflow simpler.

Also switch the ordering from human readable subject (which is not
necessarily unique), to the raw SPKI (which should always be unique).
This makes it somewhat harder to read to a human (since it'll appear a
little jumbled) but results in a stable sort.

Note this results in adding two new roots, which were added since we
last generated the bundle.

Change-Id: Id4d34bf9e98164e7b2fc4f06f9b46b63c0013d23
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/504597
Run-TryBot: Roland Shoemaker <roland@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
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* ssh: add hmac-sha2-512

This adds support for hmac-sha2-512 to ensure compatibility with SSH clients that request this MAC algorithm.

This rebases https://github.com/golang/crypto/pull/18.

Change-Id: Ia103c10a8b7e2e8dde556d5c36550eb5fa6bc1f6
GitHub-Last-Rev: 987ccae2bc7ae5e90a482d8797351c39dcb9bf33
GitHub-Pull-Request: golang/crypto#257
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/501455
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Commit-Queue: Han-Wen Nienhuys <hanwen@google.com>
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* x509roots/fallback: add //go:build go1.20 to bundle.go

Package fallback has no API; its only purpose is to automatically call
x509.SetFallbackRoots with a set of fallback roots. That API was added
in Go 1.20, hence the go1.20 build constraint in fallback.go.

Add that constraint to bundle.go too, so that it fails to build rather
than quietly being a no-op in Go 1.19.

Also simplify Write(fmt.Sprintf()) into fmt.Fprintf while here.

Add a temporary workaround for go.dev/issue/52287.
It has no effect on the public API in this module.

For golang/go#57792.
For golang/go#52287.

Change-Id: I1fe13f7d54b07b0b031e8bae685cffd7a8160165
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/505578
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
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Reviewed-by: Roland Shoemaker <roland@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>

* x509roots: generate a stable sort, for real this time

Sort based on the stringified subject, then break ties based on the raw
DER (which will, actually, be unique this time).

Change-Id: I3dd912fb19b103e92fabfb4562e31c6dcec40614
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/505695
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
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* go.mod: update golang.org/x dependencies

Update golang.org/x dependencies to their latest tagged versions.
Once this CL is submitted, and post-submit testing succeeds on all
first-class ports across all supported Go versions, this repository
will be tagged with its next minor version.

Change-Id: Icede82501a3703fcaad524f6b91ff6e5452b4547
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/507837
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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* ssh: prefer sha256 based MAC algorithms

sha256 is more optimized than sha512 in Go and is secure enough
so prefer sha256 over sha512.

Fixes golang/go#61138

Change-Id: I7658808655367f1ab5f4ac8b52e6b20bd30ebf87
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/507555
Run-TryBot: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
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Reviewed-by: Joedian Reid <joedian@golang.org>
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

* ssh: fix RSA certificate and public key authentication with older clients

After adding support for rsa-sha2-256/512 on the server side some edge
cases started to arise with old clients:

1) public key authentication with gpg-agent < 2.2.6 fails because we
   receive ssh-rsa as signature format and rsa-sha2-256 or rsa-sha2-512
   as algorithm.
   This is a bug in gpg-agent fixed in this commit:

   https://github.com/gpg/gnupg/commit/80b775bdbb852aa4a80292c9357e5b1876110c00

2) certificate authentication fails with OpenSSH 7.2-7.7 because we
   receive ssh-rsa-cert-v01@openssh.com as algorithm and rsa-sha2-256
   or rsa-sha2-512 as signature format.

This patch is based on CL 412854 and has been tested with every version
of OpenSSH from 7.1 to 7.9 and OpenSSH 9.3.

Fixes golang/go#53391

Change-Id: Id71f596f73d84efb5c76d6d5388432cccad3e3b1
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/506835
Auto-Submit: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Run-TryBot: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Reviewed-by: Roland Shoemaker <roland@golang.org>

* fix TestValidTerminalMode: missing output from echo SHELL $SHELL

add leading `echo` to have better compatibility

before

```
 go test -run ^TestValidTerminalMode -v
=== RUN   TestValidTerminalMode
    session_test.go:261: echo SHELL $SHELL && stty -a && exit:
        Last login: Thu Jul  6 12:24:38 2023 from 192.168.200.1
SHELL /bin/bashubuntu:~$
        speed 38400 baud; rows 80; columns 40;
        line = 0;
        intr = ^C; quit = ^\; erase = ^?;
        kill = ^U; eof = ^D; eol = <undef>;
        eol2 = <undef>; swtch = <undef>;
        start = ^Q; stop = ^S; susp = ^Z;
        rprnt = ^R; werase = ^W; lnext = ^V;
        discard = ^O; min = 1; time = 0;
        -parenb -parodd -cmspar cs8 -hupcl
        -cstopb cread -clocal -crtscts
        -ignbrk -brkint -ignpar -parmrk -inpck
        -istrip -inlcr -igncr icrnl ixon -ixoff
        -iuclc -ixany -imaxbel -iutf8
        opost -olcuc -ocrnl onlcr -onocr -onlret
        -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
        isig icanon iexten -echo echoe echok
        -echonl -noflsh -xcase -tostop -echoprt
        echoctl echoke -flusho -extproc
        logout
    session_test.go:266: missing output from echo SHELL $SHELL
```

after

```
 go test -run ^TestValidTerminalMode -v
=== RUN   TestValidTerminalMode
    session_test.go:261: echo SHELL $SHELL && stty -a && exit:
        Last login: Thu Jul  6 12:24:38 2023 from 192.168.200.1
        bolian@ubuntu:~$
        SHELL /bin/bash
        speed 38400 baud; rows 80; columns 40;
        line = 0;
        intr = ^C; quit = ^\; erase = ^?;
        kill = ^U; eof = ^D; eol = <undef>;
        eol2 = <undef>; swtch = <undef>;
        start = ^Q; stop = ^S; susp = ^Z;
        rprnt = ^R; werase = ^W; lnext = ^V;
        discard = ^O; min = 1; time = 0;
        -parenb -parodd -cmspar cs8 -hupcl
        -cstopb cread -clocal -crtscts
        -ignbrk -brkint -ignpar -parmrk -inpck
        -istrip -inlcr -igncr icrnl ixon -ixoff
        -iuclc -ixany -imaxbel -iutf8
        opost -olcuc -ocrnl onlcr -onocr -onlret
        -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
        isig icanon iexten -echo echoe echok
        -echonl -noflsh -xcase -tostop -echoprt
        echoctl echoke -flusho -extproc
        logout
--- PASS: TestValidTerminalMode (0.06s)
```

Change-Id: If60c040edb8c78a7d86bf58a6be47636d9e8f173
GitHub-Last-Rev: a2cc1b1af09e47df82fcb8685d829dfed945e8b0
GitHub-Pull-Request: golang/crypto#264
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/508115
Reviewed-by: Heschi Kreinick <heschi@google.com>
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* ssh: disable client agent tests on Windows

ssh-agent is implemented as a Windows service and exposed on a
named pipe. We don't currently support it.

See golang/go#60981

Change-Id: Iebdc42db30b37a87ac0766231b16aff3f17b3f56
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/509035
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* ssh: prefer sha256 based RSA key algorithms

sha256 is more optimized than sha512 in Go and is secure enough
so prefer sha256 over sha512.

Change-Id: I3fcf7457791e3ef4539e97049aa905dcd293499d
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/507556
Reviewed-by: Filippo Valsorda <filippo@golang.org>
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* internal/wycheproof: skip all tests in short test mode

The testdata for this package is around 8 MB and downloaded dynamically
via 'go mod download' from its canonical source rather than being copied
to this repository. We're moving towards disallowing all network use in
short test mode, including proxy.golang.org, so add a corresponding test
skip.

Needing to lookup a go test flag is unfortunate, but I don't know of a
less bad available option while the test does the download in TestMain.

On balance, it becomes viable to no longer disable the checksum database
since the test will only run on builders that permit internet use and so
sum.golang.org should just work.

Change-Id: Iaffe3899351da375928aaba114c4875f5438336b
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/510695
Run-TryBot: Dmitri Shuralyov <dmitshur@google.com>
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* x509roots/fallback: update bundle

This is an automated CL which updates the NSS root bundle.

Change-Id: Ic70152e674c60e48e85d96eab244add9b4fa5eb8
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/512595
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* ssh: ignore invalid MACs and KEXs just like we do for ciphers

Tighter validation could cause backwards incompatibility issues, eg
configurations with valid and invalid MACs, KEXs, ciphers currently work
if a supported algorithm is negotiated and that's also the scenario of
removing support for an existing algorithm.

Fixes golang/go#39397

Change-Id: If90253ba89e1d8f732cc1e1c3d24fe0a1e2dac71
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/512175
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* ssh: add diffie-hellman-group16-sha512 kex

This group is disabled by default because it is a bit slower than
the others.
The group18-sha512 variant is too slow to include.

Benchstat results including diffie-hellman-group18-sha512:

name                                           time/op
Kexes/diffie-hellman-group-exchange-sha256-12  22.6ms ± 9%
Kexes/diffie-hellman-group18-sha512-12          1.15s ±11%
Kexes/ecdh-sha2-nistp384-12                    3.91ms ± 6%
Kexes/ecdh-sha2-nistp256-12                     304µs ± 5%
Kexes/curve25519-sha256@libssh.org-12           413µs ± 7%
Kexes/ecdh-sha2-nistp521-12                    11.6ms ±13%
Kexes/curve25519-sha256-12                      361µs ± 5%
Kexes/diffie-hellman-group-exchange-sha1-12    22.9ms ± 9%
Kexes/diffie-hellman-group1-sha1-12            3.59ms ± 6%
Kexes/diffie-hellman-group14-sha1-12           22.1ms ±11%
Kexes/diffie-hellman-group14-sha256-12         21.6ms ± 8%
Kexes/diffie-hellman-group16-sha512-12          138ms ± 9%

name                                           alloc/op
Kexes/diffie-hellman-group-exchange-sha256-12  67.8kB ± 1%
Kexes/diffie-hellman-group18-sha512-12          243kB ± 9%
Kexes/ecdh-sha2-nistp384-12                    13.9kB ± 0%
Kexes/ecdh-sha2-nistp256-12                    12.1kB ± 0%
Kexes/curve25519-sha256@libssh.org-12          8.22kB ± 0%
Kexes/ecdh-sha2-nistp521-12                    16.5kB ± 0%
Kexes/curve25519-sha256-12                     8.22kB ± 0%
Kexes/diffie-hellman-group-exchange-sha1-12    67.5kB ± 0%
Kexes/diffie-hellman-group1-sha1-12            34.9kB ± 0%
Kexes/diffie-hellman-group14-sha1-12           61.9kB ± 0%
Kexes/diffie-hellman-group14-sha256-12         62.0kB ± 0%
Kexes/diffie-hellman-group16-sha512-12          117kB ± 0%

name                                           allocs/op
Kexes/diffie-hellman-group-exchange-sha256-12     314 ± 0%
Kexes/diffie-hellman-group18-sha512-12            271 ± 4%
Kexes/ecdh-sha2-nistp384-12                       243 ± 0%
Kexes/ecdh-sha2-nistp256-12                       213 ± 0%
Kexes/curve25519-sha256@libssh.org-12             168 ± 0%
Kexes/ecdh-sha2-nistp521-12                       245 ± 0%
Kexes/curve25519-sha256-12                        168 ± 0%
Kexes/diffie-hellman-group-exchange-sha1-12       314 ± 0%
Kexes/diffie-hellman-group1-sha1-12               255 ± 0%
Kexes/diffie-hellman-group14-sha1-12              255 ± 0%
Kexes/diffie-hellman-group14-sha256-12            255 ± 0%
Kexes/diffie-hellman-group16-sha512-12            256 ± 0%

Change-Id: Id119401fda7e417675325f37e3d442e70585206c
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Reviewed-by: Filippo Valsorda <filippo@golang.org>

* ssh: fix call to Fatalf from a non-test goroutine

Also fix some redundant type declarations.

Change-Id: Iad2950b67b1ec2e2590c59393b8ad15421ed3add
GitHub-Last-Rev: 41cf552f11387208491dee7b867050475043b25e
GitHub-Pull-Request: golang/crypto#263
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/505798
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: David Chase <drchase@google.com>
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* go.mod: update golang.org/x dependencies

Update golang.org/x dependencies to their latest tagged versions.
Once this CL is submitted, and post-submit testing succeeds on all
first-class ports across all supported Go versions, this repository
will be tagged with its next minor version.

Change-Id: Id40feba36dfc31c7033c91b952ec824a38e048ee
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* go.mod: update golang.org/x dependencies

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

Change-Id: Ib391e4f2f09056cb025de97d5d8f2640859d9163
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/525335
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* ssh: check the declared public key algo against decoded one

This check will ensure we don't accept e.g. ssh-rsa-cert-v01@openssh.com
algorithm with ssh-rsa public key type.
The algorithm and public key type must be consistent: both must be
certificate algorithms, or neither.

Change-Id: I1d75074fb4d6db3a8796408e98ddffe577a96ab1
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* ssh: support for marshaling keys using the OpenSSH format

This adds methods to marshal private keys, encrypted and unencrypted
to the OpenSSH format.

Fixes golang/go#37132

Change-Id: I1a95301f789ce04858e6b147748c6e8b7700384b
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/218620
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* cryptobyte: add uint48 methods

Adds uint48 methods for cryptobyte.Builder and cryptobyte.String.
Supporting 48-bit unsigned integers is useful for working with protocols
that use them for sequence numbers, such as DTLS.

Fixes golang/go#61275

Change-Id: Ibe49422d37644b9212b28b123dc5e01850f7b05b
GitHub-Last-Rev: 11b388c240109c8f4ac23880645c901ce6d2f093
GitHub-Pull-Request: golang/crypto#265
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/508675
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* sha3: have ShakeHash extend hash.Hash

Package sha3 recommends the SHAKE functions for new uses, but this is
currently somewhat inconvenient because ShakeHash does not implement
hash.Hash. This is understandable, as SHAKE supports arbitrary-length
outputs whereas hash.Hash only supports fixed-length outputs. But
there's a natural fixed-length output to provide: the minimum output
that still provides SHAKE's full-strength generic security.

While here, tweak Sum so that its temporary buffer can be stack
allocated.

Also, tweak the panic message in Write so that the error text is more
readily understandable to Go programmers without needing to be
familiar with crypto jargon, and add a similar check in Sum.

Change-Id: Icf037d3990a71de5630f8825606614443f8c5245
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/526937
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* ssh: add MultiAlgorithmSigner

MultiAlgorithmSigner allows to restrict client-side, server-side and
certificate signing algorithms.

Fixes golang/go#52132
Fixes golang/go#36261

Change-Id: I295092f1bba647327aaaf294f110e9157d294159
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/508398
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* ssh: add test cases for compatibility with old (buggy) clients

Improved test cases for CL 506835.

Change-Id: If4a98ae4a7b39d2e59b203d10080b71283e1a80e
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Auto-Submit: Filippo Valsorda <filippo@golang.org>

* all: use crypto/ed25519 instead of golang.org/x/crypto/ed25519

This is a follow-up to CL 317169, which dropped go1.12 compatibility,
and made the golang.org/x/crypto/ed25519 package an alias / wrapper for
crypto/ed25519 in stdlib.

This patch updates uses within this repository to use stdlib instead of
depending on the wrapper. With this patch applied, the only remaining
use of the wrapper is in ed25519_test, which appears to be in place to
verify compatibility of the wrapper itself.

Change-Id: I0195396102a75ae20bdd82ca8ab59855c0eb5cea
GitHub-Last-Rev: 24dbec563cbd84bc47bdc7736b0245fc83dd3353
GitHub-Pull-Request: golang/crypto#238
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/448238
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Nicola Murino <nicola.murino@gmail.com>
Reviewed-by: Nicola Murino <nicola.murino@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Joedian Reid <joedian@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>

* chacha20: drop Go 1.10 compatibility for arm64

Other packages already dropped compatibility with go < 1.12, so it should be safe to remove it for this package as well.

Change-Id: Ib1424763e3aa94d0187a667ebee058100136f53b
GitHub-Last-Rev: 51df9690a5f37ba50d5ae5e84cf31b78fb6c5cd8
GitHub-Pull-Request: golang/crypto#241
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/448241
Reviewed-by: Roland Shoemaker <roland@golang.org>
Auto-Submit: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Roland Shoemaker <roland@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Joedian Reid <joedian@golang.org>

* ssh: add server side support for ping@openssh.com protocol extension

Fixes golang/go#62390

Change-Id: Ie4dc577fb55b45a0c26a9e2dc5903af2bd382e00
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/524775
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Run-TryBot: Nicola Murino <nicola.murino@gmail.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>

* go.mod: update golang.org/x dependencies

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

Change-Id: Ib80d50bdd762d1ba04f9267aeddc17272ef8cd66
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/532976
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Gopher Robot <gobot@golang.org>

* ssh: add support for SSH_AGENT_CONSTRAIN_EXTENSION with id 255

it was changed in the following draft

https://datatracker.ietf.org/doc/html/draft-miller-ssh-agent-03

The id 3 is now used for SSH_AGENT_CONSTRAIN_MAXSIGN key constraint,
an OpenSSH extension to the protocol that we do not currently support.
Instead, we added a compatibility layer for
SSH_AGENT_CONSTRAIN_EXTENSION with ID 3.

Fixes golang/go#62311

Change-Id: I421aee92aee9e693e43f66e6a5515c055333cb9b
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/525355
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Nicola Murino <nicola.murino@gmail.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>

* all: update go directive to 1.18

Done with:

go get go@1.18
go mod tidy
go fix ./...

Using go1.21.3.

Also update avo to v0.5.0 in the curve25519/internal/field/_asm module.
It's newer and produces no diff in the generated code.

For golang/go#60268.

Change-Id: I9bd771ee8561595d7f68aaca76df6e3e33d35013
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/534141
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Damien Neil <dneil@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

* x509roots: check HTTP response status code and media type

The HTTP response status code is expected to be 200 OK, and
the certdata.txt file media type is expected to be plain text.
Check that it is before proceeding with parsing it.

Might help avoid repeats of CL 535735.

Change-Id: I1a7896b3e20d33a23fdc53c572ae9700c9eae1ef
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/536717
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Commit-Queue: Roland Shoemaker <roland@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Auto-Submit: Roland Shoemaker <roland@golang.org>

* x509roots: catch the zero-roots case when generating the bundle

If the parser returns zero roots, don't attempt to completely remove
the bundle. This may happen if, i.e., the HTTP response is 200 but has
no content. An example of this may be http://go.dev/cl/535735.

Change-Id: I81fc2b49c8ec813cca17fd1c807296bfb053d992
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/536136
Reviewed-by: Damien Neil <dneil@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Auto-Submit: Roland Shoemaker <roland@golang.org>

* ssh: add test case against ssh CLI

These tests try to ensure better compatibility of our server implementation
with the ssh CLI.

With these tests in place:

1) before merging CL 447757 we would have noticed that our server
   implementation was broken with OpenSSH 8.8+
2) after merging CL 447757 we would have noticed that our server
   implementation was broken with OpenSSH 7.2-7.7

The ssh CLI from $PATH is used by default, but can be overridden using
the SSH_CLI_PATH environment variable.

Change-Id: I93d64be41c7613132b0364afac8397f57c2dcbca
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/506837
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Benny Siegert <bsiegert@gmail.com>
Reviewed-by: Han-Wen Nienhuys <hanwen@google.com>
Run-TryBot: Nicola Murino <nicola.murino@gmail.com>

* crypto/hkdf: remove useless call to Reset

HKDF is commonly used to read keys that are the the same length (or
smaller) than the size of the hash digest, which means the loop inside
Read only runs once.

In that case, calling Reset is unnecesssary overhead.

name                  old time/op    new time/op    delta
16ByteMD5Single-8       1.39µs ± 1%    1.22µs ± 0%  -11.95%  (p=0.000 n=10+9)
20ByteSHA1Single-8       826ns ± 0%     746ns ± 0%   -9.70%  (p=0.000 n=9+10)
32ByteSHA256Single-8     838ns ± 1%     744ns ± 0%  -11.29%  (p=0.000 n=10+10)
64ByteSHA512Single-8    5.12µs ± 0%    4.57µs ± 0%  -10.78%  (p=0.000 n=8+10)
8ByteMD5Stream-8         137ns ± 0%     138ns ± 0%   +0.27%  (p=0.009 n=9+6)
16ByteMD5Stream-8        264ns ± 0%     265ns ± 0%   +0.29%  (p=0.000 n=10+10)
8ByteSHA1Stream-8       64.1ns ± 0%    64.4ns ± 0%   +0.60%  (p=0.000 n=9+9)
20ByteSHA1Stream-8       145ns ± 0%     146ns ± 1%   +0.69%  (p=0.000 n=9+10)
8ByteSHA256Stream-8     42.9ns ± 1%    43.1ns ± 0%   +0.48%  (p=0.005 n=10+10)
32ByteSHA256Stream-8     151ns ± 0%     152ns ± 0%   +0.35%  (p=0.006 n=10+8)
8ByteSHA512Stream-8      139ns ± 0%     139ns ± 0%   +0.08%  (p=0.035 n=9+10)
64ByteSHA512Stream-8    1.07µs ± 0%    1.07µs ± 0%   +0.33%  (p=0.000 n=9+10)

name                  old speed      new speed      delta
16ByteMD5Single-8     11.6MB/s ± 0%  13.1MB/s ± 0%  +13.50%  (p=0.000 n=9+9)
20ByteSHA1Single-8    24.2MB/s ± 0%  26.8MB/s ± 0%  +10.75%  (p=0.000 n=9+10)
32ByteSHA256Single-8  38.2MB/s ± 1%  43.0MB/s ± 0%  +12.72%  (p=0.000 n=10+10)
64ByteSHA512Single-8  12.5MB/s ± 0%  14.0MB/s ± 0%  +12.06%  (p=0.000 n=8+10)
8ByteMD5Stream-8      58.2MB/s ± 0%  58.1MB/s ± 0%   -0.27%  (p=0.004 n=9+9)
16ByteMD5Stream-8     60.6MB/s ± 0%  60.5MB/s ± 0%   -0.27%  (p=0.000 n=9+10)
8ByteSHA1Stream-8      125MB/s ± 0%   124MB/s ± 0%   -0.59%  (p=0.000 n=9+9)
20ByteSHA1Stream-8     138MB/s ± 0%   137MB/s ± 1%   -0.69%  (p=0.000 n=9+10)
8ByteSHA256Stream-8    186MB/s ± 1%   185MB/s ± 0%   -0.47%  (p=0.005 n=10+10)
32ByteSHA256Stream-8   211MB/s …
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