go.mod: update golang.org/x dependencies

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

Change-Id: Ib9440df43bc2fde0268cbe327c1df839e793f675
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/646220
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Auto-Submit: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

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/types.go

@@ -7,6 +7,7 @@ package acme
 import (
 	"crypto"
 	"crypto/x509"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"net/http"
@@ -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.

go.mod

@@ -4,8 +4,8 @@ go 1.20
 
 require (
 	golang.org/x/net v0.21.0 // tagx:ignore
-	golang.org/x/sys v0.29.0
+	golang.org/x/sys v0.30.0
-	golang.org/x/term v0.28.0
+	golang.org/x/term v0.29.0
 )
 
-require golang.org/x/text v0.21.0 // 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 v0.29.0 h1:TPYlXGxvx1MGTn2GiZDhnjPA9wZzZeGKHHmKhHYvgaU=
+golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
-golang.org/x/sys v0.29.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/term v0.28.0 h1:/Ts8HFuMR2E6IP/jlo7QVLZHggjKQbhu/7H0LJFr3Gg=
+golang.org/x/term v0.29.0 h1:L6pJp37ocefwRRtYPKSWOWzOtWSxVajvz2ldH/xi3iU=
-golang.org/x/term v0.28.0/go.mod h1:Sw/lC2IAUZ92udQNf3WodGtn4k/XoLyZoh8v/8uiwek=
+golang.org/x/term v0.29.0/go.mod h1:6bl4lRlvVuDgSf3179VpIxBF0o10JUpXWOnI7nErv7s=
-golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
+golang.org/x/text v0.22.0 h1:bofq7m3/HAFvbF51jz3Q9wLg3jkvSPuiZu/pD1XwgtM=
-golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
+golang.org/x/text v0.22.0/go.mod h1:YRoo4H8PVmsu+E3Ou7cqLVH8oXWIHVoX0jqUWALQhfY=

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.
@@ -488,6 +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
@@ -495,7 +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.
@@ -542,14 +573,10 @@ userAuthLoop:
 
 		s.user = userAuthReq.User
 
-		if !displayedBanner && config.BannerCallback != nil {
+		if !calledBannerCallback && config.BannerCallback != nil {
-			displayedBanner = true
+			calledBannerCallback = true
-			msg := config.BannerCallback(s)
+			if msg := config.BannerCallback(s); msg != "" {
-			if msg != "" {
+				if err := s.SendAuthBanner(msg); err != nil {
-				bannerMsg := &userAuthBannerMsg{
-					Message: msg,
-				}
-				if err := s.transport.writePacket(Marshal(bannerMsg)); err != nil {
 					return nil, err
 				}
 			}
@@ -762,10 +789,7 @@ userAuthLoop:
 		var bannerErr *BannerError
 		if errors.As(authErr, &bannerErr) {
 			if bannerErr.Message != "" {
-				bannerMsg := &userAuthBannerMsg{
+				if err := s.SendAuthBanner(bannerErr.Message); err != nil {
-					Message: bannerErr.Message,
-				}
-				if err := s.transport.writePacket(Marshal(bannerMsg)); err != nil {
 					return nil, err
 				}
 			}

ssh/server_test.go

@@ -348,6 +348,92 @@ func TestPublicKeyCallbackLastSeen(t *testing.T) {
 	}
 }
 
+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

@@ -981,6 +981,41 @@ PQQDAwNpADBmAjEAlJAtE/rhY/hhY+ithXhUkZy4kzg+GkHaQBZTQgjKL47xPoFW
 wKrY7RjEsK70PvomAjEA8yjixtsrmfu3Ubgko6SUeho/5jbiA1czijDLgsfWFBHV
 dWNbFJWcHwHP2NVypw87
 -----END CERTIFICATE-----
+# CN=D-TRUST BR Root CA 2 2023,O=D-Trust GmbH,C=DE
+# 0552e6f83fdf65e8fa9670e666df28a4e21340b510cbe52566f97c4fb94b2bd1
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
 # CN=D-TRUST EV Root CA 1 2020,O=D-Trust GmbH,C=DE
 # 08170d1aa36453901a2f959245e347db0c8d37abaabc56b81aa100dc958970db
 -----BEGIN CERTIFICATE-----
@@ -1001,6 +1036,41 @@ PQQDAwNpADBmAjEAyjzGKnXCXnViOTYAYFqLwZOZzNnbQTs7h5kXO9XMT8oi96CA
 y/m0sRtW9XLS/BnRAjEAkfcwkz8QRitxpNA7RJvAKQIFskF3UfN5Wp6OFKBOQtJb
 gfM0agPnIjhQW+0ZT0MW
 -----END CERTIFICATE-----
+# CN=D-TRUST EV Root CA 2 2023,O=D-Trust GmbH,C=DE
+# 8e8221b2e7d4007836a1672f0dcc299c33bc07d316f132fa1a206d587150f1ce
+-----BEGIN CERTIFICATE-----
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+XBxvWHZks/wCuPWdCg==
+-----END CERTIFICATE-----
 # CN=D-TRUST Root Class 3 CA 2 2009,O=D-Trust GmbH,C=DE
 # 49e7a442acf0ea6287050054b52564b650e4f49e42e348d6aa38e039e957b1c1
 -----BEGIN CERTIFICATE-----
@@ -2760,41 +2830,6 @@ Ld6leNcG2mqeSz53OiATIgHQv2ieY2BrNU0LbbqhPcCT4H8js1WtciVORvnSFu+w
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 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-----