all: gofmt -w -r 'interface{} -> any' src

And then revert the bootstrap cmd directories and certain testdata.
And adjust tests as needed.

Not reverting the changes in std that are bootstrapped,
because some of those changes would appear in API docs,
and we want to use any consistently.
Instead, rewrite 'any' to 'interface{}' in cmd/dist for those directories
when preparing the bootstrap copy.

A few files changed as a result of running gofmt -w
not because of interface{} -> any but because they
hadn't been updated for the new //go:build lines.

Fixes #49884.

Change-Id: Ie8045cba995f65bd79c694ec77a1b3d1fe01bb09
Reviewed-on: https://go-review.googlesource.com/c/go/+/368254
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>

cipher_suites.go

@@ -140,7 +140,7 @@ type cipherSuite struct {
 	ka     func(version uint16) keyAgreement
 	// flags is a bitmask of the suite* values, above.
 	flags  int
-	cipher func(key, iv []byte, isRead bool) interface{}
+	cipher func(key, iv []byte, isRead bool) any
 	mac    func(key []byte) hash.Hash
 	aead   func(key, fixedNonce []byte) aead
 }
@@ -399,12 +399,12 @@ func aesgcmPreferred(ciphers []uint16) bool {
 	return false
 }
 
-func cipherRC4(key, iv []byte, isRead bool) interface{} {
+func cipherRC4(key, iv []byte, isRead bool) any {
 	cipher, _ := rc4.NewCipher(key)
 	return cipher
 }
 
-func cipher3DES(key, iv []byte, isRead bool) interface{} {
+func cipher3DES(key, iv []byte, isRead bool) any {
 	block, _ := des.NewTripleDESCipher(key)
 	if isRead {
 		return cipher.NewCBCDecrypter(block, iv)
@@ -412,7 +412,7 @@ func cipher3DES(key, iv []byte, isRead bool) interface{} {
 	return cipher.NewCBCEncrypter(block, iv)
 }
 
-func cipherAES(key, iv []byte, isRead bool) interface{} {
+func cipherAES(key, iv []byte, isRead bool) any {
 	block, _ := aes.NewCipher(key)
 	if isRead {
 		return cipher.NewCBCDecrypter(block, iv)

common.go

@@ -1466,7 +1466,7 @@ func defaultConfig() *Config {
 	return &emptyConfig
 }
 
-func unexpectedMessageError(wanted, got interface{}) error {
+func unexpectedMessageError(wanted, got any) error {
 	return fmt.Errorf("tls: received unexpected handshake message of type %T when waiting for %T", got, wanted)
 }
 

conn.go

@@ -163,16 +163,16 @@ func (c *Conn) NetConn() net.Conn {
 type halfConn struct {
 	sync.Mutex
 
-	err     error       // first permanent error
+	err     error  // first permanent error
-	version uint16      // protocol version
+	version uint16 // protocol version
-	cipher  interface{} // cipher algorithm
+	cipher  any    // cipher algorithm
 	mac     hash.Hash
 	seq     [8]byte // 64-bit sequence number
 
 	scratchBuf [13]byte // to avoid allocs; interface method args escape
 
-	nextCipher interface{} // next encryption state
+	nextCipher any       // next encryption state
-	nextMac    hash.Hash   // next MAC algorithm
+	nextMac    hash.Hash // next MAC algorithm
 
 	trafficSecret []byte // current TLS 1.3 traffic secret
 }
@@ -197,7 +197,7 @@ func (hc *halfConn) setErrorLocked(err error) error {
 
 // prepareCipherSpec sets the encryption and MAC states
 // that a subsequent changeCipherSpec will use.
-func (hc *halfConn) prepareCipherSpec(version uint16, cipher interface{}, mac hash.Hash) {
+func (hc *halfConn) prepareCipherSpec(version uint16, cipher any, mac hash.Hash) {
 	hc.version = version
 	hc.nextCipher = cipher
 	hc.nextMac = mac
@@ -935,7 +935,7 @@ func (c *Conn) flush() (int, error) {
 
 // outBufPool pools the record-sized scratch buffers used by writeRecordLocked.
 var outBufPool = sync.Pool{
-	New: func() interface{} {
+	New: func() any {
 		return new([]byte)
 	},
 }
@@ -1011,7 +1011,7 @@ func (c *Conn) writeRecord(typ recordType, data []byte) (int, error) {
 
 // readHandshake reads the next handshake message from
 // the record layer.
-func (c *Conn) readHandshake() (interface{}, error) {
+func (c *Conn) readHandshake() (any, error) {
 	for c.hand.Len() < 4 {
 		if err := c.readRecord(); err != nil {
 			return nil, err

generate_cert.go

@@ -37,7 +37,7 @@ var (
 	ed25519Key = flag.Bool("ed25519", false, "Generate an Ed25519 key")
 )
 
-func publicKey(priv interface{}) interface{} {
+func publicKey(priv any) any {
 	switch k := priv.(type) {
 	case *rsa.PrivateKey:
 		return &k.PublicKey
@@ -57,7 +57,7 @@ func main() {
 		log.Fatalf("Missing required --host parameter")
 	}
 
-	var priv interface{}
+	var priv any
 	var err error
 	switch *ecdsaCurve {
 	case "":

handshake_client.go

@@ -657,7 +657,7 @@ func (hs *clientHandshakeState) establishKeys() error {
 
 	clientMAC, serverMAC, clientKey, serverKey, clientIV, serverIV :=
 		keysFromMasterSecret(c.vers, hs.suite, hs.masterSecret, hs.hello.random, hs.serverHello.random, hs.suite.macLen, hs.suite.keyLen, hs.suite.ivLen)
-	var clientCipher, serverCipher interface{}
+	var clientCipher, serverCipher any
 	var clientHash, serverHash hash.Hash
 	if hs.suite.cipher != nil {
 		clientCipher = hs.suite.cipher(clientKey, clientIV, false /* not for reading */)

handshake_client_test.go

@@ -134,7 +134,7 @@ type clientTest struct {
 	cert []byte
 	// key, if not nil, contains either a *rsa.PrivateKey, ed25519.PrivateKey or
 	// *ecdsa.PrivateKey which is the private key for the reference server.
-	key interface{}
+	key any
 	// extensions, if not nil, contains a list of extension data to be returned
 	// from the ServerHello. The data should be in standard TLS format with
 	// a 2-byte uint16 type, 2-byte data length, followed by the extension data.
@@ -171,7 +171,7 @@ func (test *clientTest) connFromCommand() (conn *recordingConn, child *exec.Cmd,
 	certPath := tempFile(string(cert))
 	defer os.Remove(certPath)
 
-	var key interface{} = testRSAPrivateKey
+	var key any = testRSAPrivateKey
 	if test.key != nil {
 		key = test.key
 	}

handshake_messages_test.go

@@ -14,7 +14,7 @@ import (
 	"time"
 )
 
-var tests = []interface{}{
+var tests = []any{
 	&clientHelloMsg{},
 	&serverHelloMsg{},
 	&finishedMsg{},

handshake_server.go

@@ -681,7 +681,7 @@ func (hs *serverHandshakeState) establishKeys() error {
 	clientMAC, serverMAC, clientKey, serverKey, clientIV, serverIV :=
 		keysFromMasterSecret(c.vers, hs.suite, hs.masterSecret, hs.clientHello.random, hs.hello.random, hs.suite.macLen, hs.suite.keyLen, hs.suite.ivLen)
 
-	var clientCipher, serverCipher interface{}
+	var clientCipher, serverCipher any
 	var clientHash, serverHash hash.Hash
 
 	if hs.suite.aead == nil {

handshake_server_test.go

@@ -249,7 +249,7 @@ func TestTLS12OnlyCipherSuites(t *testing.T) {
 	}
 
 	c, s := localPipe(t)
-	replyChan := make(chan interface{})
+	replyChan := make(chan any)
 	go func() {
 		cli := Client(c, testConfig)
 		cli.vers = clientHello.vers
@@ -304,7 +304,7 @@ func TestTLSPointFormats(t *testing.T) {
 			}
 
 			c, s := localPipe(t)
-			replyChan := make(chan interface{})
+			replyChan := make(chan any)
 			go func() {
 				cli := Client(c, testConfig)
 				cli.vers = clientHello.vers
@@ -600,7 +600,7 @@ func (test *serverTest) connFromCommand() (conn *recordingConn, child *exec.Cmd,
 		return nil, nil, err
 	}
 
-	connChan := make(chan interface{}, 1)
+	connChan := make(chan any, 1)
 	go func() {
 		tcpConn, err := l.Accept()
 		if err != nil {