crypto/tls: support ChaCha20-Poly1305.

This change adds support for the ChaCha20-Poly1305 AEAD to crypto/tls,
as specified in https://tools.ietf.org/html/rfc7905.

Fixes #15499.

Change-Id: Iaa689be90e03f208c40b574eca399e56f3c7ecf1
Reviewed-on: https://go-review.googlesource.com/30957
Run-TryBot: Adam Langley <agl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/crypto/tls/cipher_suites.go

@@ -14,6 +14,8 @@ import (
 	"crypto/sha256"
 	"crypto/x509"
 	"hash"
+
+	"golang_org/x/crypto/chacha20poly1305"
 )
 
 // a keyAgreement implements the client and server side of a TLS key agreement
@@ -75,7 +77,9 @@ type cipherSuite struct {
 
 var cipherSuites = []*cipherSuite{
 	// Ciphersuite order is chosen so that ECDHE comes before plain RSA and
-	// GCM is top preference.
+	// AEADs are the top preference.
+	{TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, 32, 0, 12, ecdheRSAKA, suiteECDHE | suiteTLS12 | suiteDefaultOff, nil, nil, aeadChaCha20Poly1305},
+	{TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, 32, 0, 12, ecdheECDSAKA, suiteECDHE | suiteECDSA | suiteTLS12 | suiteDefaultOff, nil, nil, aeadChaCha20Poly1305},
 	{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, 16, 0, 4, ecdheRSAKA, suiteECDHE | suiteTLS12, nil, nil, aeadAESGCM},
 	{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, 16, 0, 4, ecdheECDSAKA, suiteECDHE | suiteECDSA | suiteTLS12, nil, nil, aeadAESGCM},
 	{TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, 32, 0, 4, ecdheRSAKA, suiteECDHE | suiteTLS12 | suiteSHA384, nil, nil, aeadAESGCM},
@@ -145,6 +149,15 @@ type macFunction interface {
 	MAC(digestBuf, seq, header, data, extra []byte) []byte
 }
 
+type aead interface {
+	cipher.AEAD
+
+	// explicitIVLen returns the number of bytes used by the explicit nonce
+	// that is included in the record. This is eight for older AEADs and
+	// zero for modern ones.
+	explicitNonceLen() int
+}
+
 // fixedNonceAEAD wraps an AEAD and prefixes a fixed portion of the nonce to
 // each call.
 type fixedNonceAEAD struct {
@@ -157,6 +170,7 @@ type fixedNonceAEAD struct {
 
 func (f *fixedNonceAEAD) NonceSize() int        { return 8 }
 func (f *fixedNonceAEAD) Overhead() int         { return f.aead.Overhead() }
+func (f *fixedNonceAEAD) explicitNonceLen() int { return 8 }
 
 func (f *fixedNonceAEAD) Seal(out, nonce, plaintext, additionalData []byte) []byte {
 	copy(f.sealNonce[len(f.sealNonce)-8:], nonce)
@@ -168,6 +182,41 @@ func (f *fixedNonceAEAD) Open(out, nonce, plaintext, additionalData []byte) ([]b
 	return f.aead.Open(out, f.openNonce, plaintext, additionalData)
 }
 
+// xoredNonceAEAD wraps an AEAD by XORing in a fixed pattern to the nonce
+// before each call.
+type xorNonceAEAD struct {
+	nonceMask [12]byte
+	aead      cipher.AEAD
+}
+
+func (f *xorNonceAEAD) NonceSize() int        { return 8 }
+func (f *xorNonceAEAD) Overhead() int         { return f.aead.Overhead() }
+func (f *xorNonceAEAD) explicitNonceLen() int { return 0 }
+
+func (f *xorNonceAEAD) Seal(out, nonce, plaintext, additionalData []byte) []byte {
+	for i, b := range nonce {
+		f.nonceMask[4+i] ^= b
+	}
+	result := f.aead.Seal(out, f.nonceMask[:], plaintext, additionalData)
+	for i, b := range nonce {
+		f.nonceMask[4+i] ^= b
+	}
+
+	return result
+}
+
+func (f *xorNonceAEAD) Open(out, nonce, plaintext, additionalData []byte) ([]byte, error) {
+	for i, b := range nonce {
+		f.nonceMask[4+i] ^= b
+	}
+	result, err := f.aead.Open(out, f.nonceMask[:], plaintext, additionalData)
+	for i, b := range nonce {
+		f.nonceMask[4+i] ^= b
+	}
+
+	return result, err
+}
+
 func aeadAESGCM(key, fixedNonce []byte) cipher.AEAD {
 	aes, err := aes.NewCipher(key)
 	if err != nil {
@@ -185,6 +234,17 @@ func aeadAESGCM(key, fixedNonce []byte) cipher.AEAD {
 	return &fixedNonceAEAD{nonce1, nonce2, aead}
 }
 
+func aeadChaCha20Poly1305(key, fixedNonce []byte) cipher.AEAD {
+	aead, err := chacha20poly1305.New(key)
+	if err != nil {
+		panic(err)
+	}
+
+	ret := &xorNonceAEAD{aead: aead}
+	copy(ret.nonceMask[:], fixedNonce)
+	return ret
+}
+
 // ssl30MAC implements the SSLv3 MAC function, as defined in
 // www.mozilla.org/projects/security/pki/nss/ssl/draft302.txt section 5.2.3.1
 type ssl30MAC struct {
@@ -330,6 +390,8 @@ const (
 	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 uint16 = 0xc02b
 	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   uint16 = 0xc030
 	TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 uint16 = 0xc02c
+	TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305    uint16 = 0xcca8
+	TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305  uint16 = 0xcca9
 
 	// TLS_FALLBACK_SCSV isn't a standard cipher suite but an indicator
 	// that the client is doing version fallback. See

src/crypto/tls/conn.go

@@ -285,13 +285,17 @@ func (hc *halfConn) decrypt(b *block) (ok bool, prefixLen int, alertValue alert)
 		switch c := hc.cipher.(type) {
 		case cipher.Stream:
 			c.XORKeyStream(payload, payload)
-		case cipher.AEAD:
-			explicitIVLen = 8
+		case aead:
+			explicitIVLen = c.explicitNonceLen()
 			if len(payload) < explicitIVLen {
 				return false, 0, alertBadRecordMAC
 			}
-			nonce := payload[:8]
-			payload = payload[8:]
+			nonce := payload[:explicitIVLen]
+			payload = payload[explicitIVLen:]
+
+			if len(nonce) == 0 {
+				nonce = hc.seq[:]
+			}
 
 			copy(hc.additionalData[:], hc.seq[:])
 			copy(hc.additionalData[8:], b.data[:3])
@@ -398,10 +402,13 @@ func (hc *halfConn) encrypt(b *block, explicitIVLen int) (bool, alert) {
 		switch c := hc.cipher.(type) {
 		case cipher.Stream:
 			c.XORKeyStream(payload, payload)
-		case cipher.AEAD:
+		case aead:
 			payloadLen := len(b.data) - recordHeaderLen - explicitIVLen
 			b.resize(len(b.data) + c.Overhead())
 			nonce := b.data[recordHeaderLen : recordHeaderLen+explicitIVLen]
+			if len(nonce) == 0 {
+				nonce = hc.seq[:]
+			}
 			payload := b.data[recordHeaderLen+explicitIVLen:]
 			payload = payload[:payloadLen]
 
@@ -859,15 +866,16 @@ func (c *Conn) writeRecordLocked(typ recordType, data []byte) (int, error) {
 			}
 		}
 		if explicitIVLen == 0 {
-			if _, ok := c.out.cipher.(cipher.AEAD); ok {
-				explicitIVLen = 8
+			if c, ok := c.out.cipher.(aead); ok {
+				explicitIVLen = c.explicitNonceLen()
+
 				// The AES-GCM construction in TLS has an
 				// explicit nonce so that the nonce can be
 				// random. However, the nonce is only 8 bytes
 				// which is too small for a secure, random
 				// nonce. Therefore we use the sequence number
 				// as the nonce.
-				explicitIVIsSeq = true
+				explicitIVIsSeq = explicitIVLen > 0
 			}
 		}
 		m := len(data)

src/crypto/tls/handshake_client_test.go

@@ -550,6 +550,34 @@ func TestHandshakeClientX25519(t *testing.T) {
 	runClientTestTLS12(t, test)
 }
 
+func TestHandshakeClientECDHERSAChaCha20(t *testing.T) {
+	config := testConfig.Clone()
+	config.CipherSuites = []uint16{TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305}
+
+	test := &clientTest{
+		name:    "ECDHE-RSA-CHACHA20-POLY1305",
+		command: []string{"openssl", "s_server", "-cipher", "ECDHE-RSA-CHACHA20-POLY1305"},
+		config:  config,
+	}
+
+	runClientTestTLS12(t, test)
+}
+
+func TestHandshakeClientECDHEECDSAChaCha20(t *testing.T) {
+	config := testConfig.Clone()
+	config.CipherSuites = []uint16{TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305}
+
+	test := &clientTest{
+		name:    "ECDHE-ECDSA-CHACHA20-POLY1305",
+		command: []string{"openssl", "s_server", "-cipher", "ECDHE-ECDSA-CHACHA20-POLY1305"},
+		config:  config,
+		cert:    testECDSACertificate,
+		key:     testECDSAPrivateKey,
+	}
+
+	runClientTestTLS12(t, test)
+}
+
 func TestHandshakeClientCertRSA(t *testing.T) {
 	config := testConfig.Clone()
 	cert, _ := X509KeyPair([]byte(clientCertificatePEM), []byte(clientKeyPEM))

src/crypto/tls/handshake_server_test.go

@@ -40,6 +40,12 @@ var testConfig *Config
 func allCipherSuites() []uint16 {
 	ids := make([]uint16, len(cipherSuites))
 	for i, suite := range cipherSuites {
+		// Skip ChaCha20-Poly1305 cipher suites until they are enabled
+		// by default.
+		switch suite.id {
+		case TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305:
+			continue
+		}
 		ids[i] = suite.id
 	}
 

src/crypto/tls/testdata/Client-TLSv12-ECDHE-ECDSA-CHACHA20-POLY1305

+>>> Flow 1 (client to server)
+00000000  16 03 01 00 67 01 00 00  63 03 03 00 00 00 00 00  |....g...c.......|
+00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
+00000020  00 00 00 00 00 00 00 00  00 00 00 00 00 02 cc a9  |................|
+00000030  01 00 00 38 00 05 00 05  01 00 00 00 00 00 0a 00  |...8............|
+00000040  0a 00 08 00 1d 00 17 00  18 00 19 00 0b 00 02 01  |................|
+00000050  00 00 0d 00 0e 00 0c 04  01 04 03 05 01 05 03 02  |................|
+00000060  01 02 03 ff 01 00 01 00  00 12 00 00              |............|
+>>> Flow 2 (server to client)
+00000000  16 03 03 00 59 02 00 00  55 03 03 d6 47 27 38 fc  |....Y...U...G'8.|
+00000010  16 92 2c 1f a6 53 a9 31  85 65 a7 83 0a 8f cb 4d  |..,..S.1.e.....M|
+00000020  7d 5b df c1 2e b9 b1 08  e3 b9 96 20 16 0c e5 07  |}[......... ....|
+00000030  27 cc 4f 7d 11 ef 1a 14  c6 42 bf e9 c1 b7 a5 89  |'.O}.....B......|
+00000040  ca 2b 4c 30 4f c7 c8 10  13 b0 b1 6b cc a9 00 00  |.+L0O......k....|
+00000050  0d ff 01 00 01 00 00 0b  00 04 03 00 01 02 16 03  |................|
+00000060  03 02 0e 0b 00 02 0a 00  02 07 00 02 04 30 82 02  |.............0..|
+00000070  00 30 82 01 62 02 09 00  b8 bf 2d 47 a0 d2 eb f4  |.0..b.....-G....|
+00000080  30 09 06 07 2a 86 48 ce  3d 04 01 30 45 31 0b 30  |0...*.H.=..0E1.0|
+00000090  09 06 03 55 04 06 13 02  41 55 31 13 30 11 06 03  |...U....AU1.0...|
+000000a0  55 04 08 13 0a 53 6f 6d  65 2d 53 74 61 74 65 31  |U....Some-State1|
+000000b0  21 30 1f 06 03 55 04 0a  13 18 49 6e 74 65 72 6e  |!0...U....Intern|
+000000c0  65 74 20 57 69 64 67 69  74 73 20 50 74 79 20 4c  |et Widgits Pty L|
+000000d0  74 64 30 1e 17 0d 31 32  31 31 32 32 31 35 30 36  |td0...1211221506|
+000000e0  33 32 5a 17 0d 32 32 31  31 32 30 31 35 30 36 33  |32Z..22112015063|
+000000f0  32 5a 30 45 31 0b 30 09  06 03 55 04 06 13 02 41  |2Z0E1.0...U....A|
+00000100  55 31 13 30 11 06 03 55  04 08 13 0a 53 6f 6d 65  |U1.0...U....Some|
+00000110  2d 53 74 61 74 65 31 21  30 1f 06 03 55 04 0a 13  |-State1!0...U...|
+00000120  18 49 6e 74 65 72 6e 65  74 20 57 69 64 67 69 74  |.Internet Widgit|
+00000130  73 20 50 74 79 20 4c 74  64 30 81 9b 30 10 06 07  |s Pty Ltd0..0...|
+00000140  2a 86 48 ce 3d 02 01 06  05 2b 81 04 00 23 03 81  |*.H.=....+...#..|
+00000150  86 00 04 00 c4 a1 ed be  98 f9 0b 48 73 36 7e c3  |...........Hs6~.|
+00000160  16 56 11 22 f2 3d 53 c3  3b 4d 21 3d cd 6b 75 e6  |.V.".=S.;M!=.ku.|
+00000170  f6 b0 dc 9a df 26 c1 bc  b2 87 f0 72 32 7c b3 64  |.....&.....r2|.d|
+00000180  2f 1c 90 bc ea 68 23 10  7e fe e3 25 c0 48 3a 69  |/....h#.~..%.H:i|
+00000190  e0 28 6d d3 37 00 ef 04  62 dd 0d a0 9c 70 62 83  |.(m.7...b....pb.|
+000001a0  d8 81 d3 64 31 aa 9e 97  31 bd 96 b0 68 c0 9b 23  |...d1...1...h..#|
+000001b0  de 76 64 3f 1a 5c 7f e9  12 0e 58 58 b6 5f 70 dd  |.vd?.\....XX._p.|
+000001c0  9b d8 ea d5 d7 f5 d5 cc  b9 b6 9f 30 66 5b 66 9a  |...........0f[f.|
+000001d0  20 e2 27 e5 bf fe 3b 30  09 06 07 2a 86 48 ce 3d  | .'...;0...*.H.=|
+000001e0  04 01 03 81 8c 00 30 81  88 02 42 01 88 a2 4f eb  |......0...B...O.|
+000001f0  e2 45 c5 48 7d 1b ac f5  ed 98 9d ae 47 70 c0 5e  |.E.H}.......Gp.^|
+00000200  1b b6 2f bd f1 b6 4d b7  61 40 d3 11 a2 ce ee 0b  |../...M.a@......|
+00000210  7e 92 7e ff 76 9d c3 3b  7e a5 3f ce fa 10 e2 59  |~.~.v..;~.?....Y|
+00000220  ec 47 2d 7c ac da 4e 97  0e 15 a0 6f d0 02 42 01  |.G-|..N....o..B.|
+00000230  4d fc be 67 13 9c 2d 05  0e bd 3f a3 8c 25 c1 33  |M..g..-...?..%.3|
+00000240  13 83 0d 94 06 bb d4 37  7a f6 ec 7a c9 86 2e dd  |.......7z..z....|
+00000250  d7 11 69 7f 85 7c 56 de  fb 31 78 2b e4 c7 78 0d  |..i..|V..1x+..x.|
+00000260  ae cb be 9e 4e 36 24 31  7b 6a 0f 39 95 12 07 8f  |....N6$1{j.9....|
+00000270  2a 16 03 03 00 b7 0c 00  00 b3 03 00 1d 20 69 78  |*............ ix|
+00000280  7b e5 14 95 c8 d1 3c 7e  c2 d7 38 33 c3 9f 8f dc  |{.....<~..83....|
+00000290  25 8d 89 8a 99 a4 e4 8b  40 17 fc 80 43 67 04 03  |%.......@...Cg..|
+000002a0  00 8b 30 81 88 02 42 01  32 a8 dd d9 ec 11 d2 f2  |..0...B.2.......|
+000002b0  6d 86 da 31 00 8c bf ed  81 1d 8c c8 23 87 98 f7  |m..1........#...|
+000002c0  25 0c 1b 3d 9f 07 80 11  bc 07 b1 15 5f 3a 81 0e  |%..=........_:..|
+000002d0  59 04 e8 09 be ea 21 97  34 a9 8a 2f ef 3a 47 ad  |Y.....!.4../.:G.|
+000002e0  3b f9 9d f3 b8 b8 9a 93  03 02 42 01 bc 88 6b 99  |;.........B...k.|
+000002f0  d7 7a df de 5a 75 53 b0  3c 4c 1d 8b 15 c5 a7 9d  |.z..ZuS.<L......|
+00000300  3d 00 c0 f7 19 47 88 30  00 29 24 80 23 45 88 2e  |=....G.0.)$.#E..|
+00000310  11 60 3e 4b 6a 41 ad dc  3d 7d 3f 59 a0 0e fd d6  |.`>KjA..=}?Y....|
+00000320  f7 c7 7f 63 49 2f e4 4e  d9 8f 2d e5 98 16 03 03  |...cI/.N..-.....|
+00000330  00 04 0e 00 00 00                                 |......|
+>>> Flow 3 (client to server)
+00000000  16 03 03 00 25 10 00 00  21 20 2f e5 7d a3 47 cd  |....%...! /.}.G.|
+00000010  62 43 15 28 da ac 5f bb  29 07 30 ff f6 84 af c4  |bC.(.._.).0.....|
+00000020  cf c2 ed 90 99 5f 58 cb  3b 74 14 03 03 00 01 01  |....._X.;t......|
+00000030  16 03 03 00 20 7c 89 36  36 77 8c 09 31 e4 48 01  |.... |.66w..1.H.|
+00000040  6f 08 27 a8 bb 1b 1c a6  0c 09 ec 0b f6 a3 be bd  |o.'.............|
+00000050  76 70 fb f8 e5                                    |vp...|
+>>> Flow 4 (server to client)
+00000000  14 03 03 00 01 01 16 03  03 00 20 a0 db 6c df b1  |.......... ..l..|
+00000010  87 77 78 ad 22 b2 98 77  e8 57 aa 13 a8 98 35 63  |.wx."..w.W....5c|
+00000020  00 c5 13 b9 88 5d ca bf  bc c5 c3                 |.....].....|
+>>> Flow 5 (client to server)
+00000000  17 03 03 00 16 16 00 c8  c6 25 ae 11 9d a5 10 75  |.........%.....u|
+00000010  e4 4c e3 69 12 2b d9 9e  8e 40 88 15 03 03 00 12  |.L.i.+...@......|
+00000020  cf ab ac d4 c4 8e 9c 92  c4 2f 1f c6 96 0b 36 c9  |........./....6.|
+00000030  f5 22                                             |."|

src/crypto/tls/testdata/Client-TLSv12-ECDHE-RSA-CHACHA20-POLY1305

+>>> Flow 1 (client to server)
+00000000  16 03 01 00 67 01 00 00  63 03 03 00 00 00 00 00  |....g...c.......|
+00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
+00000020  00 00 00 00 00 00 00 00  00 00 00 00 00 02 cc a8  |................|
+00000030  01 00 00 38 00 05 00 05  01 00 00 00 00 00 0a 00  |...8............|
+00000040  0a 00 08 00 1d 00 17 00  18 00 19 00 0b 00 02 01  |................|
+00000050  00 00 0d 00 0e 00 0c 04  01 04 03 05 01 05 03 02  |................|
+00000060  01 02 03 ff 01 00 01 00  00 12 00 00              |............|
+>>> Flow 2 (server to client)
+00000000  16 03 03 00 59 02 00 00  55 03 03 45 f5 61 06 a8  |....Y...U..E.a..|
+00000010  4e ce c0 32 d6 af fb 12  5e c8 6c 06 ac c9 d7 e4  |N..2....^.l.....|
+00000020  02 49 09 b9 42 ee ae fa  e4 52 18 20 12 3a 53 7d  |.I..B....R. .:S}|
+00000030  11 cf 13 13 a3 f8 42 c3  98 bb bc a6 10 3e f4 13  |......B......>..|
+00000040  a5 a2 fd ef aa b3 01 3c  cb 8a 3a 2c cc a8 00 00  |.......<..:,....|
+00000050  0d ff 01 00 01 00 00 0b  00 04 03 00 01 02 16 03  |................|
+00000060  03 02 59 0b 00 02 55 00  02 52 00 02 4f 30 82 02  |..Y...U..R..O0..|
+00000070  4b 30 82 01 b4 a0 03 02  01 02 02 09 00 e8 f0 9d  |K0..............|
+00000080  3f e2 5b ea a6 30 0d 06  09 2a 86 48 86 f7 0d 01  |?.[..0...*.H....|
+00000090  01 0b 05 00 30 1f 31 0b  30 09 06 03 55 04 0a 13  |....0.1.0...U...|
+000000a0  02 47 6f 31 10 30 0e 06  03 55 04 03 13 07 47 6f  |.Go1.0...U....Go|
+000000b0  20 52 6f 6f 74 30 1e 17  0d 31 36 30 31 30 31 30  | Root0...1601010|
+000000c0  30 30 30 30 30 5a 17 0d  32 35 30 31 30 31 30 30  |00000Z..25010100|
+000000d0  30 30 30 30 5a 30 1a 31  0b 30 09 06 03 55 04 0a  |0000Z0.1.0...U..|
+000000e0  13 02 47 6f 31 0b 30 09  06 03 55 04 03 13 02 47  |..Go1.0...U....G|
+000000f0  6f 30 81 9f 30 0d 06 09  2a 86 48 86 f7 0d 01 01  |o0..0...*.H.....|
+00000100  01 05 00 03 81 8d 00 30  81 89 02 81 81 00 db 46  |.......0.......F|
+00000110  7d 93 2e 12 27 06 48 bc  06 28 21 ab 7e c4 b6 a2  |}...'.H..(!.~...|
+00000120  5d fe 1e 52 45 88 7a 36  47 a5 08 0d 92 42 5b c2  |]..RE.z6G....B[.|
+00000130  81 c0 be 97 79 98 40 fb  4f 6d 14 fd 2b 13 8b c2  |....y.@.Om..+...|
+00000140  a5 2e 67 d8 d4 09 9e d6  22 38 b7 4a 0b 74 73 2b  |..g....."8.J.ts+|
+00000150  c2 34 f1 d1 93 e5 96 d9  74 7b f3 58 9f 6c 61 3c  |.4......t{.X.la<|
+00000160  c0 b0 41 d4 d9 2b 2b 24  23 77 5b 1c 3b bd 75 5d  |..A..++$#w[.;.u]|
+00000170  ce 20 54 cf a1 63 87 1d  1e 24 c4 f3 1d 1a 50 8b  |. T..c...$....P.|
+00000180  aa b6 14 43 ed 97 a7 75  62 f4 14 c8 52 d7 02 03  |...C...ub...R...|
+00000190  01 00 01 a3 81 93 30 81  90 30 0e 06 03 55 1d 0f  |......0..0...U..|
+000001a0  01 01 ff 04 04 03 02 05  a0 30 1d 06 03 55 1d 25  |.........0...U.%|
+000001b0  04 16 30 14 06 08 2b 06  01 05 05 07 03 01 06 08  |..0...+.........|
+000001c0  2b 06 01 05 05 07 03 02  30 0c 06 03 55 1d 13 01  |+.......0...U...|
+000001d0  01 ff 04 02 30 00 30 19  06 03 55 1d 0e 04 12 04  |....0.0...U.....|
+000001e0  10 9f 91 16 1f 43 43 3e  49 a6 de 6d b6 80 d7 9f  |.....CC>I..m....|
+000001f0  60 30 1b 06 03 55 1d 23  04 14 30 12 80 10 48 13  |`0...U.#..0...H.|
+00000200  49 4d 13 7e 16 31 bb a3  01 d5 ac ab 6e 7b 30 19  |IM.~.1......n{0.|
+00000210  06 03 55 1d 11 04 12 30  10 82 0e 65 78 61 6d 70  |..U....0...examp|
+00000220  6c 65 2e 67 6f 6c 61 6e  67 30 0d 06 09 2a 86 48  |le.golang0...*.H|
+00000230  86 f7 0d 01 01 0b 05 00  03 81 81 00 9d 30 cc 40  |.............0.@|
+00000240  2b 5b 50 a0 61 cb ba e5  53 58 e1 ed 83 28 a9 58  |+[P.a...SX...(.X|
+00000250  1a a9 38 a4 95 a1 ac 31  5a 1a 84 66 3d 43 d3 2d  |..8....1Z..f=C.-|
+00000260  d9 0b f2 97 df d3 20 64  38 92 24 3a 00 bc cf 9c  |...... d8.$:....|
+00000270  7d b7 40 20 01 5f aa d3  16 61 09 a2 76 fd 13 c3  |}.@ ._...a..v...|
+00000280  cc e1 0c 5c ee b1 87 82  f1 6c 04 ed 73 bb b3 43  |...\.....l..s..C|
+00000290  77 8d 0c 1c f1 0f a1 d8  40 83 61 c9 4c 72 2b 9d  |w.......@.a.Lr+.|
+000002a0  ae db 46 06 06 4d f4 c1  b3 3e c0 d1 bd 42 d4 db  |..F..M...>...B..|
+000002b0  fe 3d 13 60 84 5c 21 d3  3b e9 fa e7 16 03 03 00  |.=.`.\!.;.......|
+000002c0  ac 0c 00 00 a8 03 00 1d  20 57 53 06 53 e5 14 06  |........ WS.S...|
+000002d0  df 26 9d 3a 06 dc a9 d5  49 d3 3f 5f 7b c2 ab 77  |.&.:....I.?_{..w|
+000002e0  fd a1 fe 28 dc 54 36 06  22 04 01 00 80 da 23 f5  |...(.T6.".....#.|
+000002f0  19 de e8 d2 a9 79 b8 37  3d c0 8c ae f6 7c d5 d9  |.....y.7=....|..|
+00000300  87 ab 6b 3f 76 7c 5f 94  be 11 55 a3 78 66 1e e3  |..k?v|_...U.xf..|
+00000310  f3 11 3d 1a f7 02 26 a4  a6 cd 7c fe 87 0d 68 a1  |..=...&...|...h.|
+00000320  50 e8 7e 94 41 bd 5b 74  d0 6d 3b 6c ef ee 88 2d  |P.~.A.[t.m;l...-|
+00000330  60 0a a9 53 cf 1f f4 03  a3 54 e5 91 36 50 62 54  |`..S.....T..6PbT|
+00000340  5f e6 e5 36 63 58 ba 7b  bb 3a 79 59 58 08 a8 f2  |_..6cX.{.:yYX...|
+00000350  f5 1e 35 f8 f5 0f 7f 19  e7 7f 5f 56 e2 50 6d 8c  |..5......._V.Pm.|
+00000360  da 45 70 60 0d 58 32 94  e7 a0 f7 da 93 16 03 03  |.Ep`.X2.........|
+00000370  00 04 0e 00 00 00                                 |......|
+>>> Flow 3 (client to server)
+00000000  16 03 03 00 25 10 00 00  21 20 2f e5 7d a3 47 cd  |....%...! /.}.G.|
+00000010  62 43 15 28 da ac 5f bb  29 07 30 ff f6 84 af c4  |bC.(.._.).0.....|
+00000020  cf c2 ed 90 99 5f 58 cb  3b 74 14 03 03 00 01 01  |....._X.;t......|
+00000030  16 03 03 00 20 9d 2f a6  b7 21 56 ad 38 a8 31 20  |.... ./..!V.8.1 |
+00000040  0b 2e dc 3f 8a 34 64 de  81 0e d3 a5 b1 c1 fc 05  |...?.4d.........|
+00000050  18 d9 3e 77 35                                    |..>w5|
+>>> Flow 4 (server to client)
+00000000  14 03 03 00 01 01 16 03  03 00 20 a8 82 60 8a ef  |.......... ..`..|
+00000010  31 55 42 e9 1d 33 0e d8  a9 b1 43 85 1c 04 7b 20  |1UB..3....C...{ |
+00000020  81 df 03 e9 fd c0 f7 32  b9 b3 31                 |.......2..1|
+>>> Flow 5 (client to server)
+00000000  17 03 03 00 16 ef 72 f7  1b 26 1a 47 99 f9 4c e7  |......r..&.G..L.|
+00000010  be 8e ab c5 8e ea 8c c6  60 6c 10 15 03 03 00 12  |........`l......|
+00000020  2c f4 39 e3 3a 74 a4 3c  72 63 77 e8 82 cf a9 e2  |,.9.:t.<rcw.....|
+00000030  2b 04                                             |+.|

src/go/build/deps_test.go

@@ -333,7 +333,9 @@ var pkgDeps = map[string][]string{
 		"crypto/sha1",
 		"crypto/sha256",
 		"crypto/sha512",
+		"golang_org/x/crypto/chacha20poly1305",
 		"golang_org/x/crypto/curve25519",
+		"golang_org/x/crypto/poly1305",
 	},
 
 	// Random byte, number generation.