acme/autocert: check host policy before probing the cache

Avoid unnessecary cache probes for names that don't match the host
policy.

Fixes golang/go#71199

Change-Id: I11e8465b0416e960a549b0c0d74a622026c39931
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/651296
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Gopher Robot <gobot@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>

README.md

@@ -2,20 +2,17 @@
 
 [![Go Reference](https://pkg.go.dev/badge/golang.org/x/crypto.svg)](https://pkg.go.dev/golang.org/x/crypto)
 
-This repository holds supplementary Go cryptography libraries.
-
-## Download/Install
-
-The easiest way to install is to run `go get -u golang.org/x/crypto/...`. You
-can also manually git clone the repository to `$GOPATH/src/golang.org/x/crypto`.
+This repository holds supplementary Go cryptography packages.
 
 ## Report Issues / Send Patches
 
 This repository uses Gerrit for code changes. To learn how to submit changes to
-this repository, see https://golang.org/doc/contribute.html.
+this repository, see https://go.dev/doc/contribute.
+
+The git repository is https://go.googlesource.com/crypto.
 
 The main issue tracker for the crypto repository is located at
-https://github.com/golang/go/issues. Prefix your issue with "x/crypto:" in the
+https://go.dev/issues. Prefix your issue with "x/crypto:" in the
 subject line, so it is easy to find.
 
 Note that contributions to the cryptography package receive additional scrutiny

acme/acme.go

@@ -514,7 +514,11 @@ func (c *Client) Accept(ctx context.Context, chal *Challenge) (*Challenge, error
 		return nil, err
 	}
 
-	res, err := c.post(ctx, nil, chal.URI, json.RawMessage("{}"), wantStatus(
+	payload := json.RawMessage("{}")
+	if len(chal.Payload) != 0 {
+		payload = chal.Payload
+	}
+	res, err := c.post(ctx, nil, chal.URI, payload, wantStatus(
 		http.StatusOK,       // according to the spec
 		http.StatusAccepted, // Let's Encrypt: see https://goo.gl/WsJ7VT (acme-divergences.md)
 	))

acme/acme_test.go

@@ -757,7 +757,7 @@ func TestTLSALPN01ChallengeCert(t *testing.T) {
 }
 
 func TestTLSChallengeCertOpt(t *testing.T) {
-	key, err := rsa.GenerateKey(rand.Reader, 512)
+	key, err := rsa.GenerateKey(rand.Reader, 1024)
 	if err != nil {
 		t.Fatal(err)
 	}

acme/autocert/autocert.go

@@ -292,6 +292,10 @@ func (m *Manager) GetCertificate(hello *tls.ClientHelloInfo) (*tls.Certificate,
 	}
 
 	// regular domain
+	if err := m.hostPolicy()(ctx, name); err != nil {
+		return nil, err
+	}
+
 	ck := certKey{
 		domain: strings.TrimSuffix(name, "."), // golang.org/issue/18114
 		isRSA:  !supportsECDSA(hello),
@@ -305,9 +309,6 @@ func (m *Manager) GetCertificate(hello *tls.ClientHelloInfo) (*tls.Certificate,
 	}
 
 	// first-time
-	if err := m.hostPolicy()(ctx, name); err != nil {
-		return nil, err
-	}
 	cert, err = m.createCert(ctx, ck)
 	if err != nil {
 		return nil, err

acme/autocert/autocert_test.go

@@ -619,7 +619,7 @@ func TestCache(t *testing.T) {
 		PrivateKey:  ecdsaKey,
 	}
 
-	rsaKey, err := rsa.GenerateKey(rand.Reader, 512)
+	rsaKey, err := rsa.GenerateKey(rand.Reader, 1024)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -694,7 +694,7 @@ func TestValidCert(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	key3, err := rsa.GenerateKey(rand.Reader, 512)
+	key3, err := rsa.GenerateKey(rand.Reader, 1024)
 	if err != nil {
 		t.Fatal(err)
 	}

acme/types.go

@@ -7,6 +7,7 @@ package acme
 import (
 	"crypto"
 	"crypto/x509"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"net/http"
@@ -288,7 +289,7 @@ type Directory struct {
 	// KeyChangeURL allows to perform account key rollover flow.
 	KeyChangeURL string
 
-	// Term is a URI identifying the current terms of service.
+	// Terms is a URI identifying the current terms of service.
 	Terms string
 
 	// Website is an HTTP or HTTPS URL locating a website
@@ -527,6 +528,16 @@ type Challenge struct {
 	// when this challenge was used.
 	// The type of a non-nil value is *Error.
 	Error error
+
+	// Payload is the JSON-formatted payload that the client sends
+	// to the server to indicate it is ready to respond to the challenge.
+	// When unset, it defaults to an empty JSON object: {}.
+	// For most challenges, the client must not set Payload,
+	// see https://tools.ietf.org/html/rfc8555#section-7.5.1.
+	// Payload is used only for newer challenges (such as "device-attest-01")
+	// where the client must send additional data for the server to validate
+	// the challenge.
+	Payload json.RawMessage
 }
 
 // wireChallenge is ACME JSON challenge representation.

argon2/_asm/go.mod

@@ -4,12 +4,12 @@ go 1.23
 
 require (
 	github.com/mmcloughlin/avo v0.6.0
-	golang.org/x/crypto v0.26.0
+	golang.org/x/crypto v0.33.0
 )
 
 require (
 	golang.org/x/mod v0.20.0 // indirect
 	golang.org/x/sync v0.8.0 // indirect
-	golang.org/x/sys v0.24.0 // indirect
+	golang.org/x/sys v0.30.0 // indirect
 	golang.org/x/tools v0.24.0 // indirect
 )

argon2/_asm/go.sum

@@ -1,12 +1,12 @@
 github.com/mmcloughlin/avo v0.6.0 h1:QH6FU8SKoTLaVs80GA8TJuLNkUYl4VokHKlPhVDg4YY=
 github.com/mmcloughlin/avo v0.6.0/go.mod h1:8CoAGaCSYXtCPR+8y18Y9aB/kxb8JSS6FRI7mSkvD+8=
-golang.org/x/crypto v0.26.0 h1:RrRspgV4mU+YwB4FYnuBoKsUapNIL5cohGAmSH3azsw=
-golang.org/x/crypto v0.26.0/go.mod h1:GY7jblb9wI+FOo5y8/S2oY4zWP07AkOJ4+jxCqdqn54=
+golang.org/x/crypto v0.33.0 h1:IOBPskki6Lysi0lo9qQvbxiQ+FvsCC/YWOecCHAixus=
+golang.org/x/crypto v0.33.0/go.mod h1:bVdXmD7IV/4GdElGPozy6U7lWdRXA4qyRVGJV57uQ5M=
 golang.org/x/mod v0.20.0 h1:utOm6MM3R3dnawAiJgn0y+xvuYRsm1RKM/4giyfDgV0=
 golang.org/x/mod v0.20.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=
 golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sys v0.24.0 h1:Twjiwq9dn6R1fQcyiK+wQyHWfaz/BJB+YIpzU/Cv3Xg=
-golang.org/x/sys v0.24.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
+golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/tools v0.24.0 h1:J1shsA93PJUEVaUSaay7UXAyE8aimq3GW0pjlolpa24=
 golang.org/x/tools v0.24.0/go.mod h1:YhNqVBIfWHdzvTLs0d8LCuMhkKUgSUKldakyV7W/WDQ=

blake2b/_asm/AVX2/go.mod

@@ -4,13 +4,13 @@ go 1.23
 
 require (
 	github.com/mmcloughlin/avo v0.6.0
-	golang.org/x/crypto v0.26.0
+	golang.org/x/crypto v0.33.0
 
 )
 
 require (
 	golang.org/x/mod v0.20.0 // indirect
 	golang.org/x/sync v0.8.0 // indirect
-	golang.org/x/sys v0.24.0 // indirect
+	golang.org/x/sys v0.30.0 // indirect
 	golang.org/x/tools v0.24.0 // indirect
 )

blake2b/_asm/AVX2/go.sum

@@ -1,12 +1,12 @@
 github.com/mmcloughlin/avo v0.6.0 h1:QH6FU8SKoTLaVs80GA8TJuLNkUYl4VokHKlPhVDg4YY=
 github.com/mmcloughlin/avo v0.6.0/go.mod h1:8CoAGaCSYXtCPR+8y18Y9aB/kxb8JSS6FRI7mSkvD+8=
-golang.org/x/crypto v0.26.0 h1:RrRspgV4mU+YwB4FYnuBoKsUapNIL5cohGAmSH3azsw=
-golang.org/x/crypto v0.26.0/go.mod h1:GY7jblb9wI+FOo5y8/S2oY4zWP07AkOJ4+jxCqdqn54=
+golang.org/x/crypto v0.33.0 h1:IOBPskki6Lysi0lo9qQvbxiQ+FvsCC/YWOecCHAixus=
+golang.org/x/crypto v0.33.0/go.mod h1:bVdXmD7IV/4GdElGPozy6U7lWdRXA4qyRVGJV57uQ5M=
 golang.org/x/mod v0.20.0 h1:utOm6MM3R3dnawAiJgn0y+xvuYRsm1RKM/4giyfDgV0=
 golang.org/x/mod v0.20.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=
 golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sys v0.24.0 h1:Twjiwq9dn6R1fQcyiK+wQyHWfaz/BJB+YIpzU/Cv3Xg=
-golang.org/x/sys v0.24.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
+golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/tools v0.24.0 h1:J1shsA93PJUEVaUSaay7UXAyE8aimq3GW0pjlolpa24=
 golang.org/x/tools v0.24.0/go.mod h1:YhNqVBIfWHdzvTLs0d8LCuMhkKUgSUKldakyV7W/WDQ=

blake2b/_asm/standard/go.mod

@@ -4,12 +4,12 @@ go 1.23
 
 require (
 	github.com/mmcloughlin/avo v0.6.0
-	golang.org/x/crypto v0.26.0
+	golang.org/x/crypto v0.33.0
 )
 
 require (
 	golang.org/x/mod v0.20.0 // indirect
 	golang.org/x/sync v0.8.0 // indirect
-	golang.org/x/sys v0.24.0 // indirect
+	golang.org/x/sys v0.30.0 // indirect
 	golang.org/x/tools v0.24.0 // indirect
 )

blake2b/_asm/standard/go.sum

@@ -1,12 +1,12 @@
 github.com/mmcloughlin/avo v0.6.0 h1:QH6FU8SKoTLaVs80GA8TJuLNkUYl4VokHKlPhVDg4YY=
 github.com/mmcloughlin/avo v0.6.0/go.mod h1:8CoAGaCSYXtCPR+8y18Y9aB/kxb8JSS6FRI7mSkvD+8=
-golang.org/x/crypto v0.26.0 h1:RrRspgV4mU+YwB4FYnuBoKsUapNIL5cohGAmSH3azsw=
-golang.org/x/crypto v0.26.0/go.mod h1:GY7jblb9wI+FOo5y8/S2oY4zWP07AkOJ4+jxCqdqn54=
+golang.org/x/crypto v0.33.0 h1:IOBPskki6Lysi0lo9qQvbxiQ+FvsCC/YWOecCHAixus=
+golang.org/x/crypto v0.33.0/go.mod h1:bVdXmD7IV/4GdElGPozy6U7lWdRXA4qyRVGJV57uQ5M=
 golang.org/x/mod v0.20.0 h1:utOm6MM3R3dnawAiJgn0y+xvuYRsm1RKM/4giyfDgV0=
 golang.org/x/mod v0.20.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=
 golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sys v0.24.0 h1:Twjiwq9dn6R1fQcyiK+wQyHWfaz/BJB+YIpzU/Cv3Xg=
-golang.org/x/sys v0.24.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
+golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/tools v0.24.0 h1:J1shsA93PJUEVaUSaay7UXAyE8aimq3GW0pjlolpa24=
 golang.org/x/tools v0.24.0/go.mod h1:YhNqVBIfWHdzvTLs0d8LCuMhkKUgSUKldakyV7W/WDQ=

blake2s/_asm/go.mod

@@ -4,12 +4,12 @@ go 1.23
 
 require (
 	github.com/mmcloughlin/avo v0.6.0
-	golang.org/x/crypto v0.26.0
+	golang.org/x/crypto v0.33.0
 )
 
 require (
 	golang.org/x/mod v0.20.0 // indirect
 	golang.org/x/sync v0.8.0 // indirect
-	golang.org/x/sys v0.24.0 // indirect
+	golang.org/x/sys v0.30.0 // indirect
 	golang.org/x/tools v0.24.0 // indirect
 )

blake2s/_asm/go.sum

@@ -1,12 +1,12 @@
 github.com/mmcloughlin/avo v0.6.0 h1:QH6FU8SKoTLaVs80GA8TJuLNkUYl4VokHKlPhVDg4YY=
 github.com/mmcloughlin/avo v0.6.0/go.mod h1:8CoAGaCSYXtCPR+8y18Y9aB/kxb8JSS6FRI7mSkvD+8=
-golang.org/x/crypto v0.26.0 h1:RrRspgV4mU+YwB4FYnuBoKsUapNIL5cohGAmSH3azsw=
-golang.org/x/crypto v0.26.0/go.mod h1:GY7jblb9wI+FOo5y8/S2oY4zWP07AkOJ4+jxCqdqn54=
+golang.org/x/crypto v0.33.0 h1:IOBPskki6Lysi0lo9qQvbxiQ+FvsCC/YWOecCHAixus=
+golang.org/x/crypto v0.33.0/go.mod h1:bVdXmD7IV/4GdElGPozy6U7lWdRXA4qyRVGJV57uQ5M=
 golang.org/x/mod v0.20.0 h1:utOm6MM3R3dnawAiJgn0y+xvuYRsm1RKM/4giyfDgV0=
 golang.org/x/mod v0.20.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=
 golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sys v0.24.0 h1:Twjiwq9dn6R1fQcyiK+wQyHWfaz/BJB+YIpzU/Cv3Xg=
-golang.org/x/sys v0.24.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
+golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/tools v0.24.0 h1:J1shsA93PJUEVaUSaay7UXAyE8aimq3GW0pjlolpa24=
 golang.org/x/tools v0.24.0/go.mod h1:YhNqVBIfWHdzvTLs0d8LCuMhkKUgSUKldakyV7W/WDQ=

chacha20/chacha_noasm.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build (!arm64 && !s390x && !ppc64le) || !gc || purego
+//go:build (!arm64 && !s390x && !ppc64 && !ppc64le) || !gc || purego
 
 package chacha20
 

chacha20/chacha_ppc64x.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build gc && !purego
+//go:build gc && !purego && (ppc64 || ppc64le)
 
 package chacha20
 

chacha20/chacha_ppc64x.s

@@ -19,7 +19,7 @@
 // The differences in this and the original implementation are
 // due to the calling conventions and initialization of constants.
 
-//go:build gc && !purego
+//go:build gc && !purego && (ppc64 || ppc64le)
 
 #include "textflag.h"
 
@@ -36,32 +36,68 @@
 // for VPERMXOR
 #define MASK  R18
 
-DATA consts<>+0x00(SB)/8, $0x3320646e61707865
-DATA consts<>+0x08(SB)/8, $0x6b20657479622d32
-DATA consts<>+0x10(SB)/8, $0x0000000000000001
-DATA consts<>+0x18(SB)/8, $0x0000000000000000
-DATA consts<>+0x20(SB)/8, $0x0000000000000004
-DATA consts<>+0x28(SB)/8, $0x0000000000000000
-DATA consts<>+0x30(SB)/8, $0x0a0b08090e0f0c0d
-DATA consts<>+0x38(SB)/8, $0x0203000106070405
-DATA consts<>+0x40(SB)/8, $0x090a0b080d0e0f0c
-DATA consts<>+0x48(SB)/8, $0x0102030005060704
-DATA consts<>+0x50(SB)/8, $0x6170786561707865
-DATA consts<>+0x58(SB)/8, $0x6170786561707865
-DATA consts<>+0x60(SB)/8, $0x3320646e3320646e
-DATA consts<>+0x68(SB)/8, $0x3320646e3320646e
-DATA consts<>+0x70(SB)/8, $0x79622d3279622d32
-DATA consts<>+0x78(SB)/8, $0x79622d3279622d32
-DATA consts<>+0x80(SB)/8, $0x6b2065746b206574
-DATA consts<>+0x88(SB)/8, $0x6b2065746b206574
-DATA consts<>+0x90(SB)/8, $0x0000000100000000
-DATA consts<>+0x98(SB)/8, $0x0000000300000002
-DATA consts<>+0xa0(SB)/8, $0x5566774411223300
-DATA consts<>+0xa8(SB)/8, $0xddeeffcc99aabb88
-DATA consts<>+0xb0(SB)/8, $0x6677445522330011
-DATA consts<>+0xb8(SB)/8, $0xeeffccddaabb8899
+DATA consts<>+0x00(SB)/4, $0x61707865
+DATA consts<>+0x04(SB)/4, $0x3320646e
+DATA consts<>+0x08(SB)/4, $0x79622d32
+DATA consts<>+0x0c(SB)/4, $0x6b206574
+DATA consts<>+0x10(SB)/4, $0x00000001
+DATA consts<>+0x14(SB)/4, $0x00000000
+DATA consts<>+0x18(SB)/4, $0x00000000
+DATA consts<>+0x1c(SB)/4, $0x00000000
+DATA consts<>+0x20(SB)/4, $0x00000004
+DATA consts<>+0x24(SB)/4, $0x00000000
+DATA consts<>+0x28(SB)/4, $0x00000000
+DATA consts<>+0x2c(SB)/4, $0x00000000
+DATA consts<>+0x30(SB)/4, $0x0e0f0c0d
+DATA consts<>+0x34(SB)/4, $0x0a0b0809
+DATA consts<>+0x38(SB)/4, $0x06070405
+DATA consts<>+0x3c(SB)/4, $0x02030001
+DATA consts<>+0x40(SB)/4, $0x0d0e0f0c
+DATA consts<>+0x44(SB)/4, $0x090a0b08
+DATA consts<>+0x48(SB)/4, $0x05060704
+DATA consts<>+0x4c(SB)/4, $0x01020300
+DATA consts<>+0x50(SB)/4, $0x61707865
+DATA consts<>+0x54(SB)/4, $0x61707865
+DATA consts<>+0x58(SB)/4, $0x61707865
+DATA consts<>+0x5c(SB)/4, $0x61707865
+DATA consts<>+0x60(SB)/4, $0x3320646e
+DATA consts<>+0x64(SB)/4, $0x3320646e
+DATA consts<>+0x68(SB)/4, $0x3320646e
+DATA consts<>+0x6c(SB)/4, $0x3320646e
+DATA consts<>+0x70(SB)/4, $0x79622d32
+DATA consts<>+0x74(SB)/4, $0x79622d32
+DATA consts<>+0x78(SB)/4, $0x79622d32
+DATA consts<>+0x7c(SB)/4, $0x79622d32
+DATA consts<>+0x80(SB)/4, $0x6b206574
+DATA consts<>+0x84(SB)/4, $0x6b206574
+DATA consts<>+0x88(SB)/4, $0x6b206574
+DATA consts<>+0x8c(SB)/4, $0x6b206574
+DATA consts<>+0x90(SB)/4, $0x00000000
+DATA consts<>+0x94(SB)/4, $0x00000001
+DATA consts<>+0x98(SB)/4, $0x00000002
+DATA consts<>+0x9c(SB)/4, $0x00000003
+DATA consts<>+0xa0(SB)/4, $0x11223300
+DATA consts<>+0xa4(SB)/4, $0x55667744
+DATA consts<>+0xa8(SB)/4, $0x99aabb88
+DATA consts<>+0xac(SB)/4, $0xddeeffcc
+DATA consts<>+0xb0(SB)/4, $0x22330011
+DATA consts<>+0xb4(SB)/4, $0x66774455
+DATA consts<>+0xb8(SB)/4, $0xaabb8899
+DATA consts<>+0xbc(SB)/4, $0xeeffccdd
 GLOBL consts<>(SB), RODATA, $0xc0
 
+#ifdef GOARCH_ppc64
+#define BE_XXBRW_INIT() \
+		LVSL (R0)(R0), V24 \
+		VSPLTISB $3, V25   \
+		VXOR V24, V25, V24 \
+
+#define BE_XXBRW(vr) VPERM vr, vr, V24, vr
+#else
+#define BE_XXBRW_INIT()
+#define BE_XXBRW(vr)
+#endif
+
 //func chaCha20_ctr32_vsx(out, inp *byte, len int, key *[8]uint32, counter *uint32)
 TEXT ·chaCha20_ctr32_vsx(SB),NOSPLIT,$64-40
 	MOVD out+0(FP), OUT
@@ -94,6 +130,8 @@ TEXT ·chaCha20_ctr32_vsx(SB),NOSPLIT,$64-40
 	// Clear V27
 	VXOR V27, V27, V27
 
+	BE_XXBRW_INIT()
+
 	// V28
 	LXVW4X (CONSTBASE)(R11), VS60
 
@@ -299,6 +337,11 @@ loop_vsx:
 	VADDUWM V8, V18, V8
 	VADDUWM V12, V19, V12
 
+	BE_XXBRW(V0)
+	BE_XXBRW(V4)
+	BE_XXBRW(V8)
+	BE_XXBRW(V12)
+
 	CMPU LEN, $64
 	BLT tail_vsx
 
@@ -327,6 +370,11 @@ loop_vsx:
 	VADDUWM V9, V18, V8
 	VADDUWM V13, V19, V12
 
+	BE_XXBRW(V0)
+	BE_XXBRW(V4)
+	BE_XXBRW(V8)
+	BE_XXBRW(V12)
+
 	CMPU  LEN, $64
 	BLT   tail_vsx
 
@@ -334,8 +382,8 @@ loop_vsx:
 	LXVW4X (INP)(R8), VS60
 	LXVW4X (INP)(R9), VS61
 	LXVW4X (INP)(R10), VS62
-	VXOR   V27, V0, V27
 
+	VXOR V27, V0, V27
 	VXOR V28, V4, V28
 	VXOR V29, V8, V29
 	VXOR V30, V12, V30
@@ -354,6 +402,11 @@ loop_vsx:
 	VADDUWM V10, V18, V8
 	VADDUWM V14, V19, V12
 
+	BE_XXBRW(V0)
+	BE_XXBRW(V4)
+	BE_XXBRW(V8)
+	BE_XXBRW(V12)
+
 	CMPU LEN, $64
 	BLT  tail_vsx
 
@@ -381,6 +434,11 @@ loop_vsx:
 	VADDUWM V11, V18, V8
 	VADDUWM V15, V19, V12
 
+	BE_XXBRW(V0)
+	BE_XXBRW(V4)
+	BE_XXBRW(V8)
+	BE_XXBRW(V12)
+
 	CMPU  LEN, $64
 	BLT   tail_vsx
 
@@ -408,9 +466,9 @@ loop_vsx:
 
 done_vsx:
 	// Increment counter by number of 64 byte blocks
-	MOVD (CNT), R14
+	MOVWZ (CNT), R14
 	ADD  BLOCKS, R14
-	MOVD R14, (CNT)
+	MOVWZ R14, (CNT)
 	RET
 
 tail_vsx:

chacha20poly1305/_asm/go.mod

@@ -4,12 +4,12 @@ go 1.23
 
 require (
 	github.com/mmcloughlin/avo v0.6.0
-	golang.org/x/crypto v0.26.0
+	golang.org/x/crypto v0.33.0
 )
 
 require (
 	golang.org/x/mod v0.20.0 // indirect
 	golang.org/x/sync v0.8.0 // indirect
-	golang.org/x/sys v0.24.0 // indirect
+	golang.org/x/sys v0.30.0 // indirect
 	golang.org/x/tools v0.24.0 // indirect
 )

chacha20poly1305/_asm/go.sum

@@ -1,12 +1,12 @@
 github.com/mmcloughlin/avo v0.6.0 h1:QH6FU8SKoTLaVs80GA8TJuLNkUYl4VokHKlPhVDg4YY=
 github.com/mmcloughlin/avo v0.6.0/go.mod h1:8CoAGaCSYXtCPR+8y18Y9aB/kxb8JSS6FRI7mSkvD+8=
-golang.org/x/crypto v0.26.0 h1:RrRspgV4mU+YwB4FYnuBoKsUapNIL5cohGAmSH3azsw=
-golang.org/x/crypto v0.26.0/go.mod h1:GY7jblb9wI+FOo5y8/S2oY4zWP07AkOJ4+jxCqdqn54=
+golang.org/x/crypto v0.33.0 h1:IOBPskki6Lysi0lo9qQvbxiQ+FvsCC/YWOecCHAixus=
+golang.org/x/crypto v0.33.0/go.mod h1:bVdXmD7IV/4GdElGPozy6U7lWdRXA4qyRVGJV57uQ5M=
 golang.org/x/mod v0.20.0 h1:utOm6MM3R3dnawAiJgn0y+xvuYRsm1RKM/4giyfDgV0=
 golang.org/x/mod v0.20.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=
 golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sys v0.24.0 h1:Twjiwq9dn6R1fQcyiK+wQyHWfaz/BJB+YIpzU/Cv3Xg=
-golang.org/x/sys v0.24.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
+golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/tools v0.24.0 h1:J1shsA93PJUEVaUSaay7UXAyE8aimq3GW0pjlolpa24=
 golang.org/x/tools v0.24.0/go.mod h1:YhNqVBIfWHdzvTLs0d8LCuMhkKUgSUKldakyV7W/WDQ=

go.mod

@@ -1,11 +1,11 @@
 module golang.org/x/crypto
 
-go 1.20
+go 1.23.0
 
 require (
 	golang.org/x/net v0.21.0 // tagx:ignore
-	golang.org/x/sys v0.26.0
-	golang.org/x/term v0.25.0
+	golang.org/x/sys v0.30.0
+	golang.org/x/term v0.29.0
 )
 
-require golang.org/x/text v0.19.0 // indirect
+require golang.org/x/text v0.22.0 // indirect

go.sum

@@ -1,8 +1,8 @@
 golang.org/x/net v0.21.0 h1:AQyQV4dYCvJ7vGmJyKki9+PBdyvhkSd8EIx/qb0AYv4=
 golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
-golang.org/x/sys v0.26.0 h1:KHjCJyddX0LoSTb3J+vWpupP9p0oznkqVk/IfjymZbo=
-golang.org/x/sys v0.26.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/term v0.25.0 h1:WtHI/ltw4NvSUig5KARz9h521QvRC8RmF/cuYqifU24=
-golang.org/x/term v0.25.0/go.mod h1:RPyXicDX+6vLxogjjRxjgD2TKtmAO6NZBsBRfrOLu7M=
-golang.org/x/text v0.19.0 h1:kTxAhCbGbxhK0IwgSKiMO5awPoDQ0RpfiVYBfK860YM=
-golang.org/x/text v0.19.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=
+golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
+golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/term v0.29.0 h1:L6pJp37ocefwRRtYPKSWOWzOtWSxVajvz2ldH/xi3iU=
+golang.org/x/term v0.29.0/go.mod h1:6bl4lRlvVuDgSf3179VpIxBF0o10JUpXWOnI7nErv7s=
+golang.org/x/text v0.22.0 h1:bofq7m3/HAFvbF51jz3Q9wLg3jkvSPuiZu/pD1XwgtM=
+golang.org/x/text v0.22.0/go.mod h1:YRoo4H8PVmsu+E3Ou7cqLVH8oXWIHVoX0jqUWALQhfY=

internal/poly1305/_asm/go.mod

@@ -4,12 +4,12 @@ go 1.23
 
 require (
 	github.com/mmcloughlin/avo v0.6.0
-	golang.org/x/crypto v0.26.0
+	golang.org/x/crypto v0.33.0
 )
 
 require (
 	golang.org/x/mod v0.20.0 // indirect
 	golang.org/x/sync v0.8.0 // indirect
-	golang.org/x/sys v0.24.0 // indirect
+	golang.org/x/sys v0.30.0 // indirect
 	golang.org/x/tools v0.24.0 // indirect
 )

internal/poly1305/_asm/go.sum

@@ -1,12 +1,12 @@
 github.com/mmcloughlin/avo v0.6.0 h1:QH6FU8SKoTLaVs80GA8TJuLNkUYl4VokHKlPhVDg4YY=
 github.com/mmcloughlin/avo v0.6.0/go.mod h1:8CoAGaCSYXtCPR+8y18Y9aB/kxb8JSS6FRI7mSkvD+8=
-golang.org/x/crypto v0.26.0 h1:RrRspgV4mU+YwB4FYnuBoKsUapNIL5cohGAmSH3azsw=
-golang.org/x/crypto v0.26.0/go.mod h1:GY7jblb9wI+FOo5y8/S2oY4zWP07AkOJ4+jxCqdqn54=
+golang.org/x/crypto v0.33.0 h1:IOBPskki6Lysi0lo9qQvbxiQ+FvsCC/YWOecCHAixus=
+golang.org/x/crypto v0.33.0/go.mod h1:bVdXmD7IV/4GdElGPozy6U7lWdRXA4qyRVGJV57uQ5M=
 golang.org/x/mod v0.20.0 h1:utOm6MM3R3dnawAiJgn0y+xvuYRsm1RKM/4giyfDgV0=
 golang.org/x/mod v0.20.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=
 golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sys v0.24.0 h1:Twjiwq9dn6R1fQcyiK+wQyHWfaz/BJB+YIpzU/Cv3Xg=
-golang.org/x/sys v0.24.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
+golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/tools v0.24.0 h1:J1shsA93PJUEVaUSaay7UXAyE8aimq3GW0pjlolpa24=
 golang.org/x/tools v0.24.0/go.mod h1:YhNqVBIfWHdzvTLs0d8LCuMhkKUgSUKldakyV7W/WDQ=

internal/poly1305/mac_noasm.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build (!amd64 && !ppc64le && !s390x) || !gc || purego
+//go:build (!amd64 && !ppc64le && !ppc64 && !s390x) || !gc || purego
 
 package poly1305
 

internal/poly1305/sum_ppc64x.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build gc && !purego
+//go:build gc && !purego && (ppc64 || ppc64le)
 
 package poly1305
 

internal/poly1305/sum_ppc64x.s

@@ -2,15 +2,25 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build gc && !purego
+//go:build gc && !purego && (ppc64 || ppc64le)
 
 #include "textflag.h"
 
 // This was ported from the amd64 implementation.
 
+#ifdef GOARCH_ppc64le
+#define LE_MOVD MOVD
+#define LE_MOVWZ MOVWZ
+#define LE_MOVHZ MOVHZ
+#else
+#define LE_MOVD MOVDBR
+#define LE_MOVWZ MOVWBR
+#define LE_MOVHZ MOVHBR
+#endif
+
 #define POLY1305_ADD(msg, h0, h1, h2, t0, t1, t2) \
-	MOVD (msg), t0;  \
-	MOVD 8(msg), t1; \
+	LE_MOVD (msg)( R0), t0; \
+	LE_MOVD (msg)(R24), t1; \
 	MOVD $1, t2;     \
 	ADDC t0, h0, h0; \
 	ADDE t1, h1, h1; \
@@ -50,10 +60,6 @@
 	ADDE   t3, h1, h1;  \
 	ADDZE  h2
 
-DATA ·poly1305Mask<>+0x00(SB)/8, $0x0FFFFFFC0FFFFFFF
-DATA ·poly1305Mask<>+0x08(SB)/8, $0x0FFFFFFC0FFFFFFC
-GLOBL ·poly1305Mask<>(SB), RODATA, $16
-
 // func update(state *[7]uint64, msg []byte)
 TEXT ·update(SB), $0-32
 	MOVD state+0(FP), R3
@@ -66,6 +72,8 @@ TEXT ·update(SB), $0-32
 	MOVD 24(R3), R11 // r0
 	MOVD 32(R3), R12 // r1
 
+	MOVD $8, R24
+
 	CMP R5, $16
 	BLT bytes_between_0_and_15
 
@@ -94,7 +102,7 @@ flush_buffer:
 
 	// Greater than 8 -- load the rightmost remaining bytes in msg
 	// and put into R17 (h1)
-	MOVD (R4)(R21), R17
+	LE_MOVD (R4)(R21), R17
 	MOVD $16, R22
 
 	// Find the offset to those bytes
@@ -118,7 +126,7 @@ just1:
 	BLT less8
 
 	// Exactly 8
-	MOVD (R4), R16
+	LE_MOVD (R4), R16
 
 	CMP R17, $0
 
@@ -133,7 +141,7 @@ less8:
 	MOVD  $0, R22   // shift count
 	CMP   R5, $4
 	BLT   less4
-	MOVWZ (R4), R16
+	LE_MOVWZ (R4), R16
 	ADD   $4, R4
 	ADD   $-4, R5
 	MOVD  $32, R22
@@ -141,7 +149,7 @@ less8:
 less4:
 	CMP   R5, $2
 	BLT   less2
-	MOVHZ (R4), R21
+	LE_MOVHZ (R4), R21
 	SLD   R22, R21, R21
 	OR    R16, R21, R16
 	ADD   $16, R22

openpgp/clearsign/clearsign_test.go

@@ -123,24 +123,12 @@ func TestSigning(t *testing.T) {
 	}
 }
 
-// We use this to make test keys, so that they aren't all the same.
-type quickRand byte
-
-func (qr *quickRand) Read(p []byte) (int, error) {
-	for i := range p {
-		p[i] = byte(*qr)
-	}
-	*qr++
-	return len(p), nil
-}
-
 func TestMultiSign(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skipping long test in -short mode")
 	}
 
-	zero := quickRand(0)
-	config := packet.Config{Rand: &zero}
+	var config packet.Config
 
 	for nKeys := 0; nKeys < 4; nKeys++ {
 	nextTest:

pkcs12/crypto.go

@@ -26,7 +26,7 @@ type pbeCipher interface {
 	create(key []byte) (cipher.Block, error)
 	// deriveKey returns a key derived from the given password and salt.
 	deriveKey(salt, password []byte, iterations int) []byte
-	// deriveKey returns an IV derived from the given password and salt.
+	// deriveIV returns an IV derived from the given password and salt.
 	deriveIV(salt, password []byte, iterations int) []byte
 }
 

salsa20/salsa/_asm/go.mod

@@ -4,7 +4,7 @@ go 1.23
 
 require (
 	github.com/mmcloughlin/avo v0.6.0
-	golang.org/x/crypto v0.26.0
+	golang.org/x/crypto v0.33.0
 )
 
 require (

salsa20/salsa/_asm/go.sum

@@ -1,7 +1,7 @@
 github.com/mmcloughlin/avo v0.6.0 h1:QH6FU8SKoTLaVs80GA8TJuLNkUYl4VokHKlPhVDg4YY=
 github.com/mmcloughlin/avo v0.6.0/go.mod h1:8CoAGaCSYXtCPR+8y18Y9aB/kxb8JSS6FRI7mSkvD+8=
-golang.org/x/crypto v0.26.0 h1:RrRspgV4mU+YwB4FYnuBoKsUapNIL5cohGAmSH3azsw=
-golang.org/x/crypto v0.26.0/go.mod h1:GY7jblb9wI+FOo5y8/S2oY4zWP07AkOJ4+jxCqdqn54=
+golang.org/x/crypto v0.33.0 h1:IOBPskki6Lysi0lo9qQvbxiQ+FvsCC/YWOecCHAixus=
+golang.org/x/crypto v0.33.0/go.mod h1:bVdXmD7IV/4GdElGPozy6U7lWdRXA4qyRVGJV57uQ5M=
 golang.org/x/mod v0.20.0 h1:utOm6MM3R3dnawAiJgn0y+xvuYRsm1RKM/4giyfDgV0=
 golang.org/x/mod v0.20.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=

sha3/_asm/go.mod

@@ -4,12 +4,12 @@ go 1.22
 
 require (
 	github.com/mmcloughlin/avo v0.6.0
-	golang.org/x/crypto v0.25.0
+	golang.org/x/crypto v0.33.0
 )
 
 require (
 	golang.org/x/mod v0.19.0 // indirect
 	golang.org/x/sync v0.7.0 // indirect
-	golang.org/x/sys v0.22.0 // indirect
+	golang.org/x/sys v0.30.0 // indirect
 	golang.org/x/tools v0.23.0 // indirect
 )

sha3/_asm/go.sum

@@ -1,12 +1,12 @@
 github.com/mmcloughlin/avo v0.6.0 h1:QH6FU8SKoTLaVs80GA8TJuLNkUYl4VokHKlPhVDg4YY=
 github.com/mmcloughlin/avo v0.6.0/go.mod h1:8CoAGaCSYXtCPR+8y18Y9aB/kxb8JSS6FRI7mSkvD+8=
-golang.org/x/crypto v0.25.0 h1:ypSNr+bnYL2YhwoMt2zPxHFmbAN1KZs/njMG3hxUp30=
-golang.org/x/crypto v0.25.0/go.mod h1:T+wALwcMOSE0kXgUAnPAHqTLW+XHgcELELW8VaDgm/M=
+golang.org/x/crypto v0.33.0 h1:IOBPskki6Lysi0lo9qQvbxiQ+FvsCC/YWOecCHAixus=
+golang.org/x/crypto v0.33.0/go.mod h1:bVdXmD7IV/4GdElGPozy6U7lWdRXA4qyRVGJV57uQ5M=
 golang.org/x/mod v0.19.0 h1:fEdghXQSo20giMthA7cd28ZC+jts4amQ3YMXiP5oMQ8=
 golang.org/x/mod v0.19.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
 golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
-golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
+golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/tools v0.23.0 h1:SGsXPZ+2l4JsgaCKkx+FQ9YZ5XEtA1GZYuoDjenLjvg=
 golang.org/x/tools v0.23.0/go.mod h1:pnu6ufv6vQkll6szChhK3C3L/ruaIv5eBeztNG8wtsI=

sha3/doc.go

@@ -5,6 +5,10 @@
 // Package sha3 implements the SHA-3 fixed-output-length hash functions and
 // the SHAKE variable-output-length hash functions defined by FIPS-202.
 //
+// All types in this package also implement [encoding.BinaryMarshaler],
+// [encoding.BinaryAppender] and [encoding.BinaryUnmarshaler] to marshal and
+// unmarshal the internal state of the hash.
+//
 // Both types of hash function use the "sponge" construction and the Keccak
 // permutation. For a detailed specification see http://keccak.noekeon.org/
 //

sha3/hashes.go

@@ -48,33 +48,52 @@ func init() {
 	crypto.RegisterHash(crypto.SHA3_512, New512)
 }
 
+const (
+	dsbyteSHA3   = 0b00000110
+	dsbyteKeccak = 0b00000001
+	dsbyteShake  = 0b00011111
+	dsbyteCShake = 0b00000100
+
+	// rateK[c] is the rate in bytes for Keccak[c] where c is the capacity in
+	// bits. Given the sponge size is 1600 bits, the rate is 1600 - c bits.
+	rateK256  = (1600 - 256) / 8
+	rateK448  = (1600 - 448) / 8
+	rateK512  = (1600 - 512) / 8
+	rateK768  = (1600 - 768) / 8
+	rateK1024 = (1600 - 1024) / 8
+)
+
 func new224Generic() *state {
-	return &state{rate: 144, outputLen: 28, dsbyte: 0x06}
+	return &state{rate: rateK448, outputLen: 28, dsbyte: dsbyteSHA3}
 }
 
 func new256Generic() *state {
-	return &state{rate: 136, outputLen: 32, dsbyte: 0x06}
+	return &state{rate: rateK512, outputLen: 32, dsbyte: dsbyteSHA3}
 }
 
 func new384Generic() *state {
-	return &state{rate: 104, outputLen: 48, dsbyte: 0x06}
+	return &state{rate: rateK768, outputLen: 48, dsbyte: dsbyteSHA3}
 }
 
 func new512Generic() *state {
-	return &state{rate: 72, outputLen: 64, dsbyte: 0x06}
+	return &state{rate: rateK1024, outputLen: 64, dsbyte: dsbyteSHA3}
 }
 
 // NewLegacyKeccak256 creates a new Keccak-256 hash.
 //
 // Only use this function if you require compatibility with an existing cryptosystem
 // that uses non-standard padding. All other users should use New256 instead.
-func NewLegacyKeccak256() hash.Hash { return &state{rate: 136, outputLen: 32, dsbyte: 0x01} }
+func NewLegacyKeccak256() hash.Hash {
+	return &state{rate: rateK512, outputLen: 32, dsbyte: dsbyteKeccak}
+}
 
 // NewLegacyKeccak512 creates a new Keccak-512 hash.
 //
 // Only use this function if you require compatibility with an existing cryptosystem
 // that uses non-standard padding. All other users should use New512 instead.
-func NewLegacyKeccak512() hash.Hash { return &state{rate: 72, outputLen: 64, dsbyte: 0x01} }
+func NewLegacyKeccak512() hash.Hash {
+	return &state{rate: rateK1024, outputLen: 64, dsbyte: dsbyteKeccak}
+}
 
 // Sum224 returns the SHA3-224 digest of the data.
 func Sum224(data []byte) (digest [28]byte) {

sha3/sha3.go

@@ -4,6 +4,15 @@
 
 package sha3
 
+import (
+	"crypto/subtle"
+	"encoding/binary"
+	"errors"
+	"unsafe"
+
+	"golang.org/x/sys/cpu"
+)
+
 // spongeDirection indicates the direction bytes are flowing through the sponge.
 type spongeDirection int
 
@@ -14,16 +23,13 @@ const (
 	spongeSqueezing
 )
 
-const (
-	// maxRate is the maximum size of the internal buffer. SHAKE-256
-	// currently needs the largest buffer.
-	maxRate = 168
-)
-
 type state struct {
-	// Generic sponge components.
-	a    [25]uint64 // main state of the hash
-	rate int        // the number of bytes of state to use
+	a [1600 / 8]byte // main state of the hash
+
+	// a[n:rate] is the buffer. If absorbing, it's the remaining space to XOR
+	// into before running the permutation. If squeezing, it's the remaining
+	// output to produce before running the permutation.
+	n, rate int
 
 	// dsbyte contains the "domain separation" bits and the first bit of
 	// the padding. Sections 6.1 and 6.2 of [1] separate the outputs of the
@@ -39,10 +45,6 @@ type state struct {
 	//      Extendable-Output Functions (May 2014)"
 	dsbyte byte
 
-	i, n    int // storage[i:n] is the buffer, i is only used while squeezing
-	storage [maxRate]byte
-
-	// Specific to SHA-3 and SHAKE.
 	outputLen int             // the default output size in bytes
 	state     spongeDirection // whether the sponge is absorbing or squeezing
 }
@@ -61,7 +63,7 @@ func (d *state) Reset() {
 		d.a[i] = 0
 	}
 	d.state = spongeAbsorbing
-	d.i, d.n = 0, 0
+	d.n = 0
 }
 
 func (d *state) clone() *state {
@@ -69,22 +71,25 @@ func (d *state) clone() *state {
 	return &ret
 }
 
-// permute applies the KeccakF-1600 permutation. It handles
-// any input-output buffering.
+// permute applies the KeccakF-1600 permutation.
 func (d *state) permute() {
-	switch d.state {
-	case spongeAbsorbing:
-		// If we're absorbing, we need to xor the input into the state
-		// before applying the permutation.
-		xorIn(d, d.storage[:d.rate])
-		d.n = 0
-		keccakF1600(&d.a)
-	case spongeSqueezing:
-		// If we're squeezing, we need to apply the permutation before
-		// copying more output.
-		keccakF1600(&d.a)
-		d.i = 0
-		copyOut(d, d.storage[:d.rate])
+	var a *[25]uint64
+	if cpu.IsBigEndian {
+		a = new([25]uint64)
+		for i := range a {
+			a[i] = binary.LittleEndian.Uint64(d.a[i*8:])
+		}
+	} else {
+		a = (*[25]uint64)(unsafe.Pointer(&d.a))
+	}
+
+	keccakF1600(a)
+	d.n = 0
+
+	if cpu.IsBigEndian {
+		for i := range a {
+			binary.LittleEndian.PutUint64(d.a[i*8:], a[i])
+		}
 	}
 }
 
@@ -92,53 +97,36 @@ func (d *state) permute() {
 // the multi-bitrate 10..1 padding rule, and permutes the state.
 func (d *state) padAndPermute() {
 	// Pad with this instance's domain-separator bits. We know that there's
-	// at least one byte of space in d.buf because, if it were full,
+	// at least one byte of space in the sponge because, if it were full,
 	// permute would have been called to empty it. dsbyte also contains the
 	// first one bit for the padding. See the comment in the state struct.
-	d.storage[d.n] = d.dsbyte
-	d.n++
-	for d.n < d.rate {
-		d.storage[d.n] = 0
-		d.n++
-	}
+	d.a[d.n] ^= d.dsbyte
 	// This adds the final one bit for the padding. Because of the way that
 	// bits are numbered from the LSB upwards, the final bit is the MSB of
 	// the last byte.
-	d.storage[d.rate-1] ^= 0x80
+	d.a[d.rate-1] ^= 0x80
 	// Apply the permutation
 	d.permute()
 	d.state = spongeSqueezing
-	d.n = d.rate
-	copyOut(d, d.storage[:d.rate])
 }
 
 // Write absorbs more data into the hash's state. It panics if any
 // output has already been read.
-func (d *state) Write(p []byte) (written int, err error) {
+func (d *state) Write(p []byte) (n int, err error) {
 	if d.state != spongeAbsorbing {
 		panic("sha3: Write after Read")
 	}
-	written = len(p)
+
+	n = len(p)
 
 	for len(p) > 0 {
-		if d.n == 0 && len(p) >= d.rate {
-			// The fast path; absorb a full "rate" bytes of input and apply the permutation.
-			xorIn(d, p[:d.rate])
-			p = p[d.rate:]
-			keccakF1600(&d.a)
-		} else {
-			// The slow path; buffer the input until we can fill the sponge, and then xor it in.
-			todo := d.rate - d.n
-			if todo > len(p) {
-				todo = len(p)
-			}
-			d.n += copy(d.storage[d.n:], p[:todo])
-			p = p[todo:]
+		x := subtle.XORBytes(d.a[d.n:d.rate], d.a[d.n:d.rate], p)
+		d.n += x
+		p = p[x:]
 
-			// If the sponge is full, apply the permutation.
-			if d.n == d.rate {
-				d.permute()
-			}
+		// If the sponge is full, apply the permutation.
+		if d.n == d.rate {
+			d.permute()
 		}
 	}
 
@@ -156,14 +144,14 @@ func (d *state) Read(out []byte) (n int, err error) {
 
 	// Now, do the squeezing.
 	for len(out) > 0 {
-		n := copy(out, d.storage[d.i:d.n])
-		d.i += n
-		out = out[n:]
-
 		// Apply the permutation if we've squeezed the sponge dry.
-		if d.i == d.rate {
+		if d.n == d.rate {
 			d.permute()
 		}
+
+		x := copy(out, d.a[d.n:d.rate])
+		d.n += x
+		out = out[x:]
 	}
 
 	return
@@ -183,3 +171,74 @@ func (d *state) Sum(in []byte) []byte {
 	dup.Read(hash)
 	return append(in, hash...)
 }
+
+const (
+	magicSHA3   = "sha\x08"
+	magicShake  = "sha\x09"
+	magicCShake = "sha\x0a"
+	magicKeccak = "sha\x0b"
+	// magic || rate || main state || n || sponge direction
+	marshaledSize = len(magicSHA3) + 1 + 200 + 1 + 1
+)
+
+func (d *state) MarshalBinary() ([]byte, error) {
+	return d.AppendBinary(make([]byte, 0, marshaledSize))
+}
+
+func (d *state) AppendBinary(b []byte) ([]byte, error) {
+	switch d.dsbyte {
+	case dsbyteSHA3:
+		b = append(b, magicSHA3...)
+	case dsbyteShake:
+		b = append(b, magicShake...)
+	case dsbyteCShake:
+		b = append(b, magicCShake...)
+	case dsbyteKeccak:
+		b = append(b, magicKeccak...)
+	default:
+		panic("unknown dsbyte")
+	}
+	// rate is at most 168, and n is at most rate.
+	b = append(b, byte(d.rate))
+	b = append(b, d.a[:]...)
+	b = append(b, byte(d.n), byte(d.state))
+	return b, nil
+}
+
+func (d *state) UnmarshalBinary(b []byte) error {
+	if len(b) != marshaledSize {
+		return errors.New("sha3: invalid hash state")
+	}
+
+	magic := string(b[:len(magicSHA3)])
+	b = b[len(magicSHA3):]
+	switch {
+	case magic == magicSHA3 && d.dsbyte == dsbyteSHA3:
+	case magic == magicShake && d.dsbyte == dsbyteShake:
+	case magic == magicCShake && d.dsbyte == dsbyteCShake:
+	case magic == magicKeccak && d.dsbyte == dsbyteKeccak:
+	default:
+		return errors.New("sha3: invalid hash state identifier")
+	}
+
+	rate := int(b[0])
+	b = b[1:]
+	if rate != d.rate {
+		return errors.New("sha3: invalid hash state function")
+	}
+
+	copy(d.a[:], b)
+	b = b[len(d.a):]
+
+	n, state := int(b[0]), spongeDirection(b[1])
+	if n > d.rate {
+		return errors.New("sha3: invalid hash state")
+	}
+	d.n = n
+	if state != spongeAbsorbing && state != spongeSqueezing {
+		return errors.New("sha3: invalid hash state")
+	}
+	d.state = state
+
+	return nil
+}

sha3/sha3_test.go

@@ -13,10 +13,12 @@ package sha3
 import (
 	"bytes"
 	"compress/flate"
+	"encoding"
 	"encoding/hex"
 	"encoding/json"
 	"fmt"
 	"hash"
+	"io"
 	"math/rand"
 	"os"
 	"strings"
@@ -375,6 +377,153 @@ func TestClone(t *testing.T) {
 	}
 }
 
+func TestCSHAKEAccumulated(t *testing.T) {
+	// Generated with pycryptodome@3.20.0
+	//
+	//    from Crypto.Hash import cSHAKE128
+	//    rng = cSHAKE128.new()
+	//    acc = cSHAKE128.new()
+	//    for n in range(200):
+	//        N = rng.read(n)
+	//        for s in range(200):
+	//            S = rng.read(s)
+	//            c = cSHAKE128.cSHAKE_XOF(data=None, custom=S, capacity=256, function=N)
+	//            c.update(rng.read(100))
+	//            acc.update(c.read(200))
+	//            c = cSHAKE128.cSHAKE_XOF(data=None, custom=S, capacity=256, function=N)
+	//            c.update(rng.read(168))
+	//            acc.update(c.read(200))
+	//            c = cSHAKE128.cSHAKE_XOF(data=None, custom=S, capacity=256, function=N)
+	//            c.update(rng.read(200))
+	//            acc.update(c.read(200))
+	//    print(acc.read(32).hex())
+	//
+	// and with @noble/hashes@v1.5.0
+	//
+	//    import { bytesToHex } from "@noble/hashes/utils";
+	//    import { cshake128 } from "@noble/hashes/sha3-addons";
+	//    const rng = cshake128.create();
+	//    const acc = cshake128.create();
+	//    for (let n = 0; n < 200; n++) {
+	//        const N = rng.xof(n);
+	//        for (let s = 0; s < 200; s++) {
+	//            const S = rng.xof(s);
+	//            let c = cshake128.create({ NISTfn: N, personalization: S });
+	//            c.update(rng.xof(100));
+	//            acc.update(c.xof(200));
+	//            c = cshake128.create({ NISTfn: N, personalization: S });
+	//            c.update(rng.xof(168));
+	//            acc.update(c.xof(200));
+	//            c = cshake128.create({ NISTfn: N, personalization: S });
+	//            c.update(rng.xof(200));
+	//            acc.update(c.xof(200));
+	//        }
+	//    }
+	//    console.log(bytesToHex(acc.xof(32)));
+	//
+	t.Run("cSHAKE128", func(t *testing.T) {
+		testCSHAKEAccumulated(t, NewCShake128, rateK256,
+			"bb14f8657c6ec5403d0b0e2ef3d3393497e9d3b1a9a9e8e6c81dbaa5fd809252")
+	})
+	t.Run("cSHAKE256", func(t *testing.T) {
+		testCSHAKEAccumulated(t, NewCShake256, rateK512,
+			"0baaf9250c6e25f0c14ea5c7f9bfde54c8a922c8276437db28f3895bdf6eeeef")
+	})
+}
+
+func testCSHAKEAccumulated(t *testing.T, newCShake func(N, S []byte) ShakeHash, rate int64, exp string) {
+	rnd := newCShake(nil, nil)
+	acc := newCShake(nil, nil)
+	for n := 0; n < 200; n++ {
+		N := make([]byte, n)
+		rnd.Read(N)
+		for s := 0; s < 200; s++ {
+			S := make([]byte, s)
+			rnd.Read(S)
+
+			c := newCShake(N, S)
+			io.CopyN(c, rnd, 100 /* < rate */)
+			io.CopyN(acc, c, 200)
+
+			c.Reset()
+			io.CopyN(c, rnd, rate)
+			io.CopyN(acc, c, 200)
+
+			c.Reset()
+			io.CopyN(c, rnd, 200 /* > rate */)
+			io.CopyN(acc, c, 200)
+		}
+	}
+	if got := hex.EncodeToString(acc.Sum(nil)[:32]); got != exp {
+		t.Errorf("got %s, want %s", got, exp)
+	}
+}
+
+func TestCSHAKELargeS(t *testing.T) {
+	if testing.Short() {
+		t.Skip("skipping test in short mode.")
+	}
+
+	// See https://go.dev/issue/66232.
+	const s = (1<<32)/8 + 1000 // s * 8 > 2^32
+	S := make([]byte, s)
+	rnd := NewShake128()
+	rnd.Read(S)
+	c := NewCShake128(nil, S)
+	io.CopyN(c, rnd, 1000)
+
+	// Generated with pycryptodome@3.20.0
+	//
+	//    from Crypto.Hash import cSHAKE128
+	//    rng = cSHAKE128.new()
+	//    S = rng.read(536871912)
+	//    c = cSHAKE128.new(custom=S)
+	//    c.update(rng.read(1000))
+	//    print(c.read(32).hex())
+	//
+	exp := "2cb9f237767e98f2614b8779cf096a52da9b3a849280bbddec820771ae529cf0"
+	if got := hex.EncodeToString(c.Sum(nil)); got != exp {
+		t.Errorf("got %s, want %s", got, exp)
+	}
+}
+
+func TestMarshalUnmarshal(t *testing.T) {
+	t.Run("SHA3-224", func(t *testing.T) { testMarshalUnmarshal(t, New224()) })
+	t.Run("SHA3-256", func(t *testing.T) { testMarshalUnmarshal(t, New256()) })
+	t.Run("SHA3-384", func(t *testing.T) { testMarshalUnmarshal(t, New384()) })
+	t.Run("SHA3-512", func(t *testing.T) { testMarshalUnmarshal(t, New512()) })
+	t.Run("SHAKE128", func(t *testing.T) { testMarshalUnmarshal(t, NewShake128()) })
+	t.Run("SHAKE256", func(t *testing.T) { testMarshalUnmarshal(t, NewShake256()) })
+	t.Run("cSHAKE128", func(t *testing.T) { testMarshalUnmarshal(t, NewCShake128([]byte("N"), []byte("S"))) })
+	t.Run("cSHAKE256", func(t *testing.T) { testMarshalUnmarshal(t, NewCShake256([]byte("N"), []byte("S"))) })
+	t.Run("Keccak-256", func(t *testing.T) { testMarshalUnmarshal(t, NewLegacyKeccak256()) })
+	t.Run("Keccak-512", func(t *testing.T) { testMarshalUnmarshal(t, NewLegacyKeccak512()) })
+}
+
+// TODO(filippo): move this to crypto/internal/cryptotest.
+func testMarshalUnmarshal(t *testing.T, h hash.Hash) {
+	buf := make([]byte, 200)
+	rand.Read(buf)
+	n := rand.Intn(200)
+	h.Write(buf)
+	want := h.Sum(nil)
+	h.Reset()
+	h.Write(buf[:n])
+	b, err := h.(encoding.BinaryMarshaler).MarshalBinary()
+	if err != nil {
+		t.Errorf("MarshalBinary: %v", err)
+	}
+	h.Write(bytes.Repeat([]byte{0}, 200))
+	if err := h.(encoding.BinaryUnmarshaler).UnmarshalBinary(b); err != nil {
+		t.Errorf("UnmarshalBinary: %v", err)
+	}
+	h.Write(buf[n:])
+	got := h.Sum(nil)
+	if !bytes.Equal(got, want) {
+		t.Errorf("got %x, want %x", got, want)
+	}
+}
+
 // BenchmarkPermutationFunction measures the speed of the permutation function
 // with no input data.
 func BenchmarkPermutationFunction(b *testing.B) {

sha3/shake.go

@@ -16,9 +16,12 @@ package sha3
 // [2] https://doi.org/10.6028/NIST.SP.800-185
 
 import (
+	"bytes"
 	"encoding/binary"
+	"errors"
 	"hash"
 	"io"
+	"math/bits"
 )
 
 // ShakeHash defines the interface to hash functions that support
@@ -50,41 +53,33 @@ type cshakeState struct {
 	initBlock []byte
 }
 
-// Consts for configuring initial SHA-3 state
-const (
-	dsbyteShake  = 0x1f
-	dsbyteCShake = 0x04
-	rate128      = 168
-	rate256      = 136
-)
-
-func bytepad(input []byte, w int) []byte {
-	// leftEncode always returns max 9 bytes
-	buf := make([]byte, 0, 9+len(input)+w)
-	buf = append(buf, leftEncode(uint64(w))...)
-	buf = append(buf, input...)
-	padlen := w - (len(buf) % w)
-	return append(buf, make([]byte, padlen)...)
+func bytepad(data []byte, rate int) []byte {
+	out := make([]byte, 0, 9+len(data)+rate-1)
+	out = append(out, leftEncode(uint64(rate))...)
+	out = append(out, data...)
+	if padlen := rate - len(out)%rate; padlen < rate {
+		out = append(out, make([]byte, padlen)...)
+	}
+	return out
 }
 
-func leftEncode(value uint64) []byte {
-	var b [9]byte
-	binary.BigEndian.PutUint64(b[1:], value)
-	// Trim all but last leading zero bytes
-	i := byte(1)
-	for i < 8 && b[i] == 0 {
-		i++
+func leftEncode(x uint64) []byte {
+	// Let n be the smallest positive integer for which 2^(8n) > x.
+	n := (bits.Len64(x) + 7) / 8
+	if n == 0 {
+		n = 1
 	}
-	// Prepend number of encoded bytes
-	b[i-1] = 9 - i
-	return b[i-1:]
+	// Return n || x with n as a byte and x an n bytes in big-endian order.
+	b := make([]byte, 9)
+	binary.BigEndian.PutUint64(b[1:], x)
+	b = b[9-n-1:]
+	b[0] = byte(n)
+	return b
 }
 
 func newCShake(N, S []byte, rate, outputLen int, dsbyte byte) ShakeHash {
 	c := cshakeState{state: &state{rate: rate, outputLen: outputLen, dsbyte: dsbyte}}
-
-	// leftEncode returns max 9 bytes
-	c.initBlock = make([]byte, 0, 9*2+len(N)+len(S))
+	c.initBlock = make([]byte, 0, 9+len(N)+9+len(S)) // leftEncode returns max 9 bytes
 	c.initBlock = append(c.initBlock, leftEncode(uint64(len(N))*8)...)
 	c.initBlock = append(c.initBlock, N...)
 	c.initBlock = append(c.initBlock, leftEncode(uint64(len(S))*8)...)
@@ -111,6 +106,30 @@ func (c *state) Clone() ShakeHash {
 	return c.clone()
 }
 
+func (c *cshakeState) MarshalBinary() ([]byte, error) {
+	return c.AppendBinary(make([]byte, 0, marshaledSize+len(c.initBlock)))
+}
+
+func (c *cshakeState) AppendBinary(b []byte) ([]byte, error) {
+	b, err := c.state.AppendBinary(b)
+	if err != nil {
+		return nil, err
+	}
+	b = append(b, c.initBlock...)
+	return b, nil
+}
+
+func (c *cshakeState) UnmarshalBinary(b []byte) error {
+	if len(b) <= marshaledSize {
+		return errors.New("sha3: invalid hash state")
+	}
+	if err := c.state.UnmarshalBinary(b[:marshaledSize]); err != nil {
+		return err
+	}
+	c.initBlock = bytes.Clone(b[marshaledSize:])
+	return nil
+}
+
 // NewShake128 creates a new SHAKE128 variable-output-length ShakeHash.
 // Its generic security strength is 128 bits against all attacks if at
 // least 32 bytes of its output are used.
@@ -126,11 +145,11 @@ func NewShake256() ShakeHash {
 }
 
 func newShake128Generic() *state {
-	return &state{rate: rate128, outputLen: 32, dsbyte: dsbyteShake}
+	return &state{rate: rateK256, outputLen: 32, dsbyte: dsbyteShake}
 }
 
 func newShake256Generic() *state {
-	return &state{rate: rate256, outputLen: 64, dsbyte: dsbyteShake}
+	return &state{rate: rateK512, outputLen: 64, dsbyte: dsbyteShake}
 }
 
 // NewCShake128 creates a new instance of cSHAKE128 variable-output-length ShakeHash,
@@ -143,7 +162,7 @@ func NewCShake128(N, S []byte) ShakeHash {
 	if len(N) == 0 && len(S) == 0 {
 		return NewShake128()
 	}
-	return newCShake(N, S, rate128, 32, dsbyteCShake)
+	return newCShake(N, S, rateK256, 32, dsbyteCShake)
 }
 
 // NewCShake256 creates a new instance of cSHAKE256 variable-output-length ShakeHash,
@@ -156,7 +175,7 @@ func NewCShake256(N, S []byte) ShakeHash {
 	if len(N) == 0 && len(S) == 0 {
 		return NewShake256()
 	}
-	return newCShake(N, S, rate256, 64, dsbyteCShake)
+	return newCShake(N, S, rateK512, 64, dsbyteCShake)
 }
 
 // ShakeSum128 writes an arbitrary-length digest of data into hash.

sha3/xor.go

@@ -1,40 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package sha3
-
-import (
-	"crypto/subtle"
-	"encoding/binary"
-	"unsafe"
-
-	"golang.org/x/sys/cpu"
-)
-
-// xorIn xors the bytes in buf into the state.
-func xorIn(d *state, buf []byte) {
-	if cpu.IsBigEndian {
-		for i := 0; len(buf) >= 8; i++ {
-			a := binary.LittleEndian.Uint64(buf)
-			d.a[i] ^= a
-			buf = buf[8:]
-		}
-	} else {
-		ab := (*[25 * 64 / 8]byte)(unsafe.Pointer(&d.a))
-		subtle.XORBytes(ab[:], ab[:], buf)
-	}
-}
-
-// copyOut copies uint64s to a byte buffer.
-func copyOut(d *state, b []byte) {
-	if cpu.IsBigEndian {
-		for i := 0; len(b) >= 8; i++ {
-			binary.LittleEndian.PutUint64(b, d.a[i])
-			b = b[8:]
-		}
-	} else {
-		ab := (*[25 * 64 / 8]byte)(unsafe.Pointer(&d.a))
-		copy(b, ab[:])
-	}
-}

ssh/certs_test.go

@@ -15,14 +15,12 @@ import (
 	"reflect"
 	"testing"
 	"time"
+
+	"golang.org/x/crypto/ssh/testdata"
 )
 
-// Cert generated by ssh-keygen 6.0p1 Debian-4.
-// % ssh-keygen -s ca-key -I test user-key
-const exampleSSHCert = `ssh-rsa-cert-v01@openssh.com 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`
-
 func TestParseCert(t *testing.T) {
-	authKeyBytes := []byte(exampleSSHCert)
+	authKeyBytes := bytes.TrimSuffix(testdata.SSHCertificates["rsa"], []byte(" host.example.com\n"))
 
 	key, _, _, rest, err := ParseAuthorizedKey(authKeyBytes)
 	if err != nil {
@@ -103,7 +101,7 @@ func TestParseCertWithOptions(t *testing.T) {
 }
 
 func TestValidateCert(t *testing.T) {
-	key, _, _, _, err := ParseAuthorizedKey([]byte(exampleSSHCert))
+	key, _, _, _, err := ParseAuthorizedKey(testdata.SSHCertificates["rsa-user-testcertificate"])
 	if err != nil {
 		t.Fatalf("ParseAuthorizedKey: %v", err)
 	}
@@ -116,7 +114,7 @@ func TestValidateCert(t *testing.T) {
 		return bytes.Equal(k.Marshal(), validCert.SignatureKey.Marshal())
 	}
 
-	if err := checker.CheckCert("user", validCert); err != nil {
+	if err := checker.CheckCert("testcertificate", validCert); err != nil {
 		t.Errorf("Unable to validate certificate: %v", err)
 	}
 	invalidCert := &Certificate{
@@ -125,7 +123,7 @@ func TestValidateCert(t *testing.T) {
 		ValidBefore:  CertTimeInfinity,
 		Signature:    &Signature{},
 	}
-	if err := checker.CheckCert("user", invalidCert); err == nil {
+	if err := checker.CheckCert("testcertificate", invalidCert); err == nil {
 		t.Error("Invalid cert signature passed validation")
 	}
 }

ssh/client_auth.go

@@ -555,6 +555,7 @@ func (cb KeyboardInteractiveChallenge) auth(session []byte, user string, c packe
 	}
 
 	gotMsgExtInfo := false
+	gotUserAuthInfoRequest := false
 	for {
 		packet, err := c.readPacket()
 		if err != nil {
@@ -585,6 +586,9 @@ func (cb KeyboardInteractiveChallenge) auth(session []byte, user string, c packe
 			if msg.PartialSuccess {
 				return authPartialSuccess, msg.Methods, nil
 			}
+			if !gotUserAuthInfoRequest {
+				return authFailure, msg.Methods, unexpectedMessageError(msgUserAuthInfoRequest, packet[0])
+			}
 			return authFailure, msg.Methods, nil
 		case msgUserAuthSuccess:
 			return authSuccess, nil, nil
@@ -596,6 +600,7 @@ func (cb KeyboardInteractiveChallenge) auth(session []byte, user string, c packe
 		if err := Unmarshal(packet, &msg); err != nil {
 			return authFailure, nil, err
 		}
+		gotUserAuthInfoRequest = true
 
 		// Manually unpack the prompt/echo pairs.
 		rest := msg.Prompts

ssh/client_auth_test.go

@@ -38,7 +38,7 @@ func tryAuth(t *testing.T, config *ClientConfig) error {
 	return err
 }
 
-// tryAuth runs a handshake with a given config against an SSH server
+// tryAuthWithGSSAPIWithMICConfig runs a handshake with a given config against an SSH server
 // with a given GSSAPIWithMICConfig and config serverConfig. Returns both client and server side errors.
 func tryAuthWithGSSAPIWithMICConfig(t *testing.T, clientConfig *ClientConfig, gssAPIWithMICConfig *GSSAPIWithMICConfig) error {
 	err, _ := tryAuthBothSides(t, clientConfig, gssAPIWithMICConfig)
@@ -1293,3 +1293,92 @@ func TestCertAuthOpenSSHCompat(t *testing.T) {
 		t.Fatalf("unable to dial remote side: %s", err)
 	}
 }
+
+func TestKeyboardInteractiveAuthEarlyFail(t *testing.T) {
+	const maxAuthTries = 2
+
+	c1, c2, err := netPipe()
+	if err != nil {
+		t.Fatalf("netPipe: %v", err)
+	}
+	defer c1.Close()
+	defer c2.Close()
+
+	// Start testserver
+	serverConfig := &ServerConfig{
+		MaxAuthTries: maxAuthTries,
+		KeyboardInteractiveCallback: func(c ConnMetadata,
+			client KeyboardInteractiveChallenge) (*Permissions, error) {
+			// Fail keyboard-interactive authentication early before
+			// any prompt is sent to client.
+			return nil, errors.New("keyboard-interactive auth failed")
+		},
+		PasswordCallback: func(c ConnMetadata,
+			pass []byte) (*Permissions, error) {
+			if string(pass) == clientPassword {
+				return nil, nil
+			}
+			return nil, errors.New("password auth failed")
+		},
+	}
+	serverConfig.AddHostKey(testSigners["rsa"])
+
+	serverDone := make(chan struct{})
+	go func() {
+		defer func() { serverDone <- struct{}{} }()
+		conn, chans, reqs, err := NewServerConn(c2, serverConfig)
+		if err != nil {
+			return
+		}
+		_ = conn.Close()
+
+		discarderDone := make(chan struct{})
+		go func() {
+			defer func() { discarderDone <- struct{}{} }()
+			DiscardRequests(reqs)
+		}()
+		for newChannel := range chans {
+			newChannel.Reject(Prohibited,
+				"testserver not accepting requests")
+		}
+
+		<-discarderDone
+	}()
+
+	// Connect to testserver, expect KeyboardInteractive() to be not called,
+	// PasswordCallback() to be called and connection to succeed.
+	passwordCallbackCalled := false
+	clientConfig := &ClientConfig{
+		User: "testuser",
+		Auth: []AuthMethod{
+			RetryableAuthMethod(KeyboardInteractive(func(name,
+				instruction string, questions []string,
+				echos []bool) ([]string, error) {
+				t.Errorf("unexpected call to KeyboardInteractive()")
+				return []string{clientPassword}, nil
+			}), maxAuthTries),
+			RetryableAuthMethod(PasswordCallback(func() (secret string,
+				err error) {
+				t.Logf("PasswordCallback()")
+				passwordCallbackCalled = true
+				return clientPassword, nil
+			}), maxAuthTries),
+		},
+		HostKeyCallback: InsecureIgnoreHostKey(),
+	}
+
+	conn, _, _, err := NewClientConn(c1, "", clientConfig)
+	if err != nil {
+		t.Errorf("unexpected NewClientConn() error: %v", err)
+	}
+	if conn != nil {
+		conn.Close()
+	}
+
+	// Wait for server to finish.
+	<-serverDone
+
+	if !passwordCallbackCalled {
+		t.Errorf("expected PasswordCallback() to be called")
+	}
+}

ssh/handshake.go

@@ -80,6 +80,7 @@ type handshakeTransport struct {
 	pendingPackets   [][]byte // Used when a key exchange is in progress.
 	writePacketsLeft uint32
 	writeBytesLeft   int64
+	userAuthComplete bool // whether the user authentication phase is complete
 
 	// If the read loop wants to schedule a kex, it pings this
 	// channel, and the write loop will send out a kex
@@ -552,16 +553,25 @@ func (t *handshakeTransport) sendKexInit() error {
 	return nil
 }
 
+var errSendBannerPhase = errors.New("ssh: SendAuthBanner outside of authentication phase")
+
 func (t *handshakeTransport) writePacket(p []byte) error {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+
 	switch p[0] {
 	case msgKexInit:
 		return errors.New("ssh: only handshakeTransport can send kexInit")
 	case msgNewKeys:
 		return errors.New("ssh: only handshakeTransport can send newKeys")
+	case msgUserAuthBanner:
+		if t.userAuthComplete {
+			return errSendBannerPhase
+		}
+	case msgUserAuthSuccess:
+		t.userAuthComplete = true
 	}
 
-	t.mu.Lock()
-	defer t.mu.Unlock()
 	if t.writeError != nil {
 		return t.writeError
 	}

ssh/server.go

@@ -59,6 +59,27 @@ type GSSAPIWithMICConfig struct {
 	Server GSSAPIServer
 }
 
+// SendAuthBanner implements [ServerPreAuthConn].
+func (s *connection) SendAuthBanner(msg string) error {
+	return s.transport.writePacket(Marshal(&userAuthBannerMsg{
+		Message: msg,
+	}))
+}
+
+func (*connection) unexportedMethodForFutureProofing() {}
+
+// ServerPreAuthConn is the interface available on an incoming server
+// connection before authentication has completed.
+type ServerPreAuthConn interface {
+	unexportedMethodForFutureProofing() // permits growing ServerPreAuthConn safely later, ala testing.TB
+
+	ConnMetadata
+
+	// SendAuthBanner sends a banner message to the client.
+	// It returns an error once the authentication phase has ended.
+	SendAuthBanner(string) error
+}
+
 // ServerConfig holds server specific configuration data.
 type ServerConfig struct {
 	// Config contains configuration shared between client and server.
@@ -118,6 +139,12 @@ type ServerConfig struct {
 	// attempts.
 	AuthLogCallback func(conn ConnMetadata, method string, err error)
 
+	// PreAuthConnCallback, if non-nil, is called upon receiving a new connection
+	// before any authentication has started. The provided ServerPreAuthConn
+	// can be used at any time before authentication is complete, including
+	// after this callback has returned.
+	PreAuthConnCallback func(ServerPreAuthConn)
+
 	// ServerVersion is the version identification string to announce in
 	// the public handshake.
 	// If empty, a reasonable default is used.
@@ -149,7 +176,7 @@ func (s *ServerConfig) AddHostKey(key Signer) {
 }
 
 // cachedPubKey contains the results of querying whether a public key is
-// acceptable for a user.
+// acceptable for a user. This is a FIFO cache.
 type cachedPubKey struct {
 	user       string
 	pubKeyData []byte
@@ -157,7 +184,13 @@ type cachedPubKey struct {
 	perms      *Permissions
 }
 
-const maxCachedPubKeys = 16
+// maxCachedPubKeys is the number of cache entries we store.
+//
+// Due to consistent misuse of the PublicKeyCallback API, we have reduced this
+// to 1, such that the only key in the cache is the most recently seen one. This
+// forces the behavior that the last call to PublicKeyCallback will always be
+// with the key that is used for authentication.
+const maxCachedPubKeys = 1
 
 // pubKeyCache caches tests for public keys.  Since SSH clients
 // will query whether a public key is acceptable before attempting to
@@ -179,9 +212,10 @@ func (c *pubKeyCache) get(user string, pubKeyData []byte) (cachedPubKey, bool) {
 
 // add adds the given tuple to the cache.
 func (c *pubKeyCache) add(candidate cachedPubKey) {
-	if len(c.keys) < maxCachedPubKeys {
-		c.keys = append(c.keys, candidate)
+	if len(c.keys) >= maxCachedPubKeys {
+		c.keys = c.keys[1:]
 	}
+	c.keys = append(c.keys, candidate)
 }
 
 // ServerConn is an authenticated SSH connection, as seen from the
@@ -481,6 +515,10 @@ func (b *BannerError) Error() string {
 }
 
 func (s *connection) serverAuthenticate(config *ServerConfig) (*Permissions, error) {
+	if config.PreAuthConnCallback != nil {
+		config.PreAuthConnCallback(s)
+	}
+
 	sessionID := s.transport.getSessionID()
 	var cache pubKeyCache
 	var perms *Permissions
@@ -488,7 +526,7 @@ func (s *connection) serverAuthenticate(config *ServerConfig) (*Permissions, err
 	authFailures := 0
 	noneAuthCount := 0
 	var authErrs []error
-	var displayedBanner bool
+	var calledBannerCallback bool
 	partialSuccessReturned := false
 	// Set the initial authentication callbacks from the config. They can be
 	// changed if a PartialSuccessError is returned.
@@ -535,14 +573,10 @@ userAuthLoop:
 
 		s.user = userAuthReq.User
 
-		if !displayedBanner && config.BannerCallback != nil {
-			displayedBanner = true
-			msg := config.BannerCallback(s)
-			if msg != "" {
-				bannerMsg := &userAuthBannerMsg{
-					Message: msg,
-				}
-				if err := s.transport.writePacket(Marshal(bannerMsg)); err != nil {
+		if !calledBannerCallback && config.BannerCallback != nil {
+			calledBannerCallback = true
+			if msg := config.BannerCallback(s); msg != "" {
+				if err := s.SendAuthBanner(msg); err != nil {
 					return nil, err
 				}
 			}
@@ -755,10 +789,7 @@ userAuthLoop:
 		var bannerErr *BannerError
 		if errors.As(authErr, &bannerErr) {
 			if bannerErr.Message != "" {
-				bannerMsg := &userAuthBannerMsg{
-					Message: bannerErr.Message,
-				}
-				if err := s.transport.writePacket(Marshal(bannerMsg)); err != nil {
+				if err := s.SendAuthBanner(bannerErr.Message); err != nil {
 					return nil, err
 				}
 			}

ssh/server_test.go

@@ -5,6 +5,7 @@
 package ssh
 
 import (
+	"bytes"
 	"errors"
 	"fmt"
 	"io"
@@ -299,6 +300,140 @@ func TestBannerError(t *testing.T) {
 	}
 }
 
+func TestPublicKeyCallbackLastSeen(t *testing.T) {
+	var lastSeenKey PublicKey
+
+	c1, c2, err := netPipe()
+	if err != nil {
+		t.Fatalf("netPipe: %v", err)
+	}
+	defer c1.Close()
+	defer c2.Close()
+	serverConf := &ServerConfig{
+		PublicKeyCallback: func(conn ConnMetadata, key PublicKey) (*Permissions, error) {
+			lastSeenKey = key
+			fmt.Printf("seen %#v\n", key)
+			if _, ok := key.(*dsaPublicKey); !ok {
+				return nil, errors.New("nope")
+			}
+			return nil, nil
+		},
+	}
+	serverConf.AddHostKey(testSigners["ecdsap256"])
+
+	done := make(chan struct{})
+	go func() {
+		defer close(done)
+		NewServerConn(c1, serverConf)
+	}()
+
+	clientConf := ClientConfig{
+		User: "user",
+		Auth: []AuthMethod{
+			PublicKeys(testSigners["rsa"], testSigners["dsa"], testSigners["ed25519"]),
+		},
+		HostKeyCallback: InsecureIgnoreHostKey(),
+	}
+
+	_, _, _, err = NewClientConn(c2, "", &clientConf)
+	if err != nil {
+		t.Fatal(err)
+	}
+	<-done
+
+	expectedPublicKey := testSigners["dsa"].PublicKey().Marshal()
+	lastSeenMarshalled := lastSeenKey.Marshal()
+	if !bytes.Equal(lastSeenMarshalled, expectedPublicKey) {
+		t.Errorf("unexpected key: got %#v, want %#v", lastSeenKey, testSigners["dsa"].PublicKey())
+	}
+}
+
+func TestPreAuthConnAndBanners(t *testing.T) {
+	testDone := make(chan struct{})
+	defer close(testDone)
+
+	authConnc := make(chan ServerPreAuthConn, 1)
+	serverConfig := &ServerConfig{
+		PreAuthConnCallback: func(c ServerPreAuthConn) {
+			t.Logf("got ServerPreAuthConn: %v", c)
+			authConnc <- c // for use later in the test
+			for _, s := range []string{"hello1", "hello2"} {
+				if err := c.SendAuthBanner(s); err != nil {
+					t.Errorf("failed to send banner %q: %v", s, err)
+				}
+			}
+			// Now start a goroutine to spam SendAuthBanner in hopes
+			// of hitting a race.
+			go func() {
+				for {
+					select {
+					case <-testDone:
+						return
+					default:
+						if err := c.SendAuthBanner("attempted-race"); err != nil && err != errSendBannerPhase {
+							t.Errorf("unexpected error from SendAuthBanner: %v", err)
+						}
+						time.Sleep(5 * time.Millisecond)
+					}
+				}
+			}()
+		},
+		NoClientAuth: true,
+		NoClientAuthCallback: func(ConnMetadata) (*Permissions, error) {
+			t.Logf("got NoClientAuthCallback")
+			return &Permissions{}, nil
+		},
+	}
+	serverConfig.AddHostKey(testSigners["rsa"])
+
+	var banners []string
+	clientConfig := &ClientConfig{
+		User:            "test",
+		HostKeyCallback: InsecureIgnoreHostKey(),
+		BannerCallback: func(msg string) error {
+			if msg != "attempted-race" {
+				banners = append(banners, msg)
+			}
+			return nil
+		},
+	}
+
+	c1, c2, err := netPipe()
+	if err != nil {
+		t.Fatalf("netPipe: %v", err)
+	}
+	defer c1.Close()
+	defer c2.Close()
+	go newServer(c1, serverConfig)
+	c, _, _, err := NewClientConn(c2, "", clientConfig)
+	if err != nil {
+		t.Fatalf("client connection failed: %v", err)
+	}
+	defer c.Close()
+
+	wantBanners := []string{
+		"hello1",
+		"hello2",
+	}
+	if !reflect.DeepEqual(banners, wantBanners) {
+		t.Errorf("got banners:\n%q\nwant banners:\n%q", banners, wantBanners)
+	}
+
+	// Now that we're authenticated, verify that use of SendBanner
+	// is an error.
+	var bc ServerPreAuthConn
+	select {
+	case bc = <-authConnc:
+	default:
+		t.Fatal("expected ServerPreAuthConn")
+	}
+	if err := bc.SendAuthBanner("wrong-phase"); err == nil {
+		t.Error("unexpected success of SendAuthBanner after authentication")
+	} else if err != errSendBannerPhase {
+		t.Errorf("unexpected error: %v; want %v", err, errSendBannerPhase)
+	}
+}
+
 type markerConn struct {
 	closed uint32
 	used   uint32

x509roots/fallback/bundle.go

@@ -1,7 +1,5 @@
 // Code generated by gen_fallback_bundle.go; DO NOT EDIT.
 
-//go:build go1.20
-
 package fallback
 
 import "crypto/x509"
@@ -161,98 +159,6 @@ ZCzJJ7VLkn5l/9Mt4blOvH+kQSGQQXemOR/qnuOf0GZvBeyqdn6/axag67XH/JJU
 LysRJyU3eExRarDzzFhdFPFqSBX/wge2sY0PjlxQRrM9vwGYT7JZVEc+NHt4bVaT
 LnPqZih4zR0Uv6CPLy64Lo7yFIrM6bV8+2ydDKXhlg==
 -----END CERTIFICATE-----
-# CN=AffirmTrust Commercial,O=AffirmTrust,C=US
-# 0376ab1d54c5f9803ce4b2e201a0ee7eef7b57b636e8a93c9b8d4860c96f5fa7
------BEGIN CERTIFICATE-----
-MIIDTDCCAjSgAwIBAgIId3cGJyapsXwwDQYJKoZIhvcNAQELBQAwRDELMAkGA1UE
-BhMCVVMxFDASBgNVBAoMC0FmZmlybVRydXN0MR8wHQYDVQQDDBZBZmZpcm1UcnVz
-dCBDb21tZXJjaWFsMB4XDTEwMDEyOTE0MDYwNloXDTMwMTIzMTE0MDYwNlowRDEL
-MAkGA1UEBhMCVVMxFDASBgNVBAoMC0FmZmlybVRydXN0MR8wHQYDVQQDDBZBZmZp
-cm1UcnVzdCBDb21tZXJjaWFsMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKC
-AQEA9htPZwcroRX1BiLLHwGy43NFBkRJLLtJJRTWzsO3qyxPxkEylFf6EqdbDuKP
-Hx6GGaeqtS25Xw2Kwq+FNXkyLbscYjfysVtKPcrNcV/pQr6U6Mje+SJIZMblq8Yr
-ba0F8PrVC8+a5fBQpIs7R6UjW3p6+DM/uO+Zl+MgwdYoic+U+7lF7eNAFxHUdPAL
-MeIrJmqbTFeurCA+ukV6BfO9m2kVrn1OIGPENXY6BwLJN/3HR+7o8XYdcxXyl6S1
-yHp52UKqK39c/s4mT6NmgTWvRLpUHhwwMmWd5jyTXlBOeuM61G7MGvv50jeuJCqr
-VwMiKA1JdX+3KNp1v47j3A55MQIDAQABo0IwQDAdBgNVHQ4EFgQUnZPGU4teyq8/
-nx4P5ZmVvCT2lI8wDwYDVR0TAQH/BAUwAwEB/zAOBgNVHQ8BAf8EBAMCAQYwDQYJ
-KoZIhvcNAQELBQADggEBAFis9AQOzcAN/wr91LoWXym9e2iZWEnStB03TX8nfUYG
-XUPGhi4+c7ImfU+TqbbEKpqrIZcUsd6M06uJFdhrJNTxFq7YpFzUf1GO7RgBsZNj
-vbz4YYCanrHOQnDiqX0GJX0nof5v7LMeJNrjS1UaADs1tDvZ110w/YETifLCBivt
-Z8SOyUOyXGsViQK8YvxO8rUzqrJv0wqiUOP2O+guRMLbZjipM1ZI8W0bM40NjD9g
-N53Tym1+NH4Nn3J2ixufcv1SNUFFApYvHLKac0khsUlHRUe072o0EclNmsxZt9YC
-nlpOZbWUrhvfKbAW8b8Angc6F2S1BLUjIZkKlTuXfO8=
------END CERTIFICATE-----
-# CN=AffirmTrust Networking,O=AffirmTrust,C=US
-# 0a81ec5a929777f145904af38d5d509f66b5e2c58fcdb531058b0e17f3f0b41b
------BEGIN CERTIFICATE-----
-MIIDTDCCAjSgAwIBAgIIfE8EORzUmS0wDQYJKoZIhvcNAQEFBQAwRDELMAkGA1UE
-BhMCVVMxFDASBgNVBAoMC0FmZmlybVRydXN0MR8wHQYDVQQDDBZBZmZpcm1UcnVz
-dCBOZXR3b3JraW5nMB4XDTEwMDEyOTE0MDgyNFoXDTMwMTIzMTE0MDgyNFowRDEL
-MAkGA1UEBhMCVVMxFDASBgNVBAoMC0FmZmlybVRydXN0MR8wHQYDVQQDDBZBZmZp
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 # CN=Amazon Root CA 1,O=Amazon,C=US
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+# CN=D-TRUST BR Root CA 2 2023,O=D-Trust GmbH,C=DE
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 # CN=D-TRUST EV Root CA 1 2020,O=D-Trust GmbH,C=DE
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 -----END CERTIFICATE-----
+# CN=D-TRUST EV Root CA 2 2023,O=D-Trust GmbH,C=DE
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 # CN=D-TRUST Root Class 3 CA 2 2009,O=D-Trust GmbH,C=DE
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-# CN=Entrust Root Certification Authority,OU=www.entrust.net/CPS is incorporated by reference+OU=(c) 2006 Entrust\, Inc.,O=Entrust\, Inc.,C=US
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------END CERTIFICATE-----
-# CN=Entrust.net Certification Authority (2048),OU=www.entrust.net/CPS_2048 incorp. by ref. (limits liab.)+OU=(c) 1999 Entrust.net Limited,O=Entrust.net
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
 # CN=FIRMAPROFESIONAL CA ROOT-A WEB,O=Firmaprofesional SA,C=ES,2.5.4.97=#130f56415445532d413632363334303638
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-# CN=SecureSign RootCA11,O=Japan Certification Services\, Inc.,C=JP
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------END CERTIFICATE-----
 # CN=SecureTrust CA,O=SecureTrust Corporation,C=US
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------END CERTIFICATE-----
 # CN=Starfield Root Certificate Authority - G2,O=Starfield Technologies\, Inc.,L=Scottsdale,ST=Arizona,C=US
 # 2ce1cb0bf9d2f9e102993fbe215152c3b2dd0cabde1c68e5319b839154dbb7f5
 -----BEGIN CERTIFICATE-----
@@ -3050,41 +2828,6 @@ Ld6leNcG2mqeSz53OiATIgHQv2ieY2BrNU0LbbqhPcCT4H8js1WtciVORvnSFu+w
 ZMEBnunKoGqYDs/YYPIvSbjkQuE4NRb0yG5P94FW6LqjviOvrv1vA+ACOzB2+htt
 Qc8Bsem4yWb02ybzOqR08kkkW8mw0FfB+j564ZfJ
 -----END CERTIFICATE-----
-# CN=SwissSign Silver CA - G2,O=SwissSign AG,C=CH
-# be6c4da2bbb9ba59b6f3939768374246c3c005993fa98f020d1dedbed48a81d5
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
 # CN=T-TeleSec GlobalRoot Class 2,OU=T-Systems Trust Center,O=T-Systems Enterprise Services GmbH,C=DE
 # 91e2f5788d5810eba7ba58737de1548a8ecacd014598bc0b143e041b17052552
 -----BEGIN CERTIFICATE-----

x509roots/fallback/fallback.go

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build go1.20
-
 // Package fallback embeds a set of fallback X.509 trusted roots in the
 // application by automatically invoking [x509.SetFallbackRoots]. This allows
 // the application to work correctly even if the operating system does not

x509roots/fallback/go.mod

@@ -1,3 +1,3 @@
 module golang.org/x/crypto/x509roots/fallback
 
-go 1.20
+go 1.23.0

x509roots/gen_fallback_bundle.go

@@ -27,8 +27,6 @@ import (
 
 const tmpl = `// Code generated by gen_fallback_bundle.go; DO NOT EDIT.
 
-//go:build go1.20
-
 package fallback
 
 import "crypto/x509"