Update vendored utls

- Adds Chrome 83 fingerprint

vendor/github.com/refraction-networking/utls/README.md

@@ -66,6 +66,7 @@ This is not a problem, if you fully control the server and turn unsupported thin
 | Chrome 62     | no       | no         | ChannelID              | [0a4a74aeebd1bb66](https://tlsfingerprint.io/id/0a4a74aeebd1bb66) |
 | Chrome 70     | no       | no         | ChannelID, Encrypted Certs | [bc4c7e42f4961cd7](https://tlsfingerprint.io/id/bc4c7e42f4961cd7) |
 | Chrome 72     | no       | no         | ChannelID, Encrypted Certs | [bbf04e5f1881f506](https://tlsfingerprint.io/id/bbf04e5f1881f506) |
+| Chrome 83     | no       | no         | ChannelID, Encrypted Certs | [9c673fd64a32c8dc](https://tlsfingerprint.io/id/9c673fd64a32c8dc) |
 | Firefox 56    | very low | no         | None                   | [c884bad7f40bee56](https://tlsfingerprint.io/id/c884bad7f40bee56) |
 | Firefox 65    | very low | no         | MaxRecordSize                   | [6bfedc5d5c740d58](https://tlsfingerprint.io/id/6bfedc5d5c740d58) |
 | iOS 11.1      | low** | no         | None                   | [71a81bafd58e1301](https://tlsfingerprint.io/id/71a81bafd58e1301) |

vendor/github.com/refraction-networking/utls/u_common.go

@@ -145,11 +145,12 @@ var (
 	HelloFirefox_63   = ClientHelloID{helloFirefox, "63", nil}
 	HelloFirefox_65   = ClientHelloID{helloFirefox, "65", nil}
 
-	HelloChrome_Auto = HelloChrome_72
+	HelloChrome_Auto = HelloChrome_83
 	HelloChrome_58   = ClientHelloID{helloChrome, "58", nil}
 	HelloChrome_62   = ClientHelloID{helloChrome, "62", nil}
 	HelloChrome_70   = ClientHelloID{helloChrome, "70", nil}
 	HelloChrome_72   = ClientHelloID{helloChrome, "72", nil}
+	HelloChrome_83   = ClientHelloID{helloChrome, "83", nil}
 
 	HelloIOS_Auto = HelloIOS_12_1
 	HelloIOS_11_1 = ClientHelloID{helloIOS, "111", nil} // legacy "111" means 11.1

vendor/github.com/refraction-networking/utls/u_parrots.go

@@ -212,6 +212,78 @@ func utlsIdToSpec(id ClientHelloID) (ClientHelloSpec, error) {
 				&UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle},
 			},
 		}, nil
+	case HelloChrome_83:
+		return ClientHelloSpec{
+			CipherSuites: []uint16{
+				GREASE_PLACEHOLDER,
+				TLS_AES_128_GCM_SHA256,
+				TLS_AES_256_GCM_SHA384,
+				TLS_CHACHA20_POLY1305_SHA256,
+				TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
+				TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
+				TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
+				TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
+				TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
+				TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
+				TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
+				TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
+				TLS_RSA_WITH_AES_128_GCM_SHA256,
+				TLS_RSA_WITH_AES_256_GCM_SHA384,
+				TLS_RSA_WITH_AES_128_CBC_SHA,
+				TLS_RSA_WITH_AES_256_CBC_SHA,
+			},
+			CompressionMethods: []byte{
+				0x00, // compressionNone
+			},
+			Extensions: []TLSExtension{
+				&UtlsGREASEExtension{},
+				&SNIExtension{},
+				&UtlsExtendedMasterSecretExtension{},
+				&RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient},
+				&SupportedCurvesExtension{[]CurveID{
+					CurveID(GREASE_PLACEHOLDER),
+					X25519,
+					CurveP256,
+					CurveP384,
+				}},
+				&SupportedPointsExtension{SupportedPoints: []byte{
+					0x00, // pointFormatUncompressed
+				}},
+				&SessionTicketExtension{},
+				&ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}},
+				&StatusRequestExtension{},
+				&SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{
+					ECDSAWithP256AndSHA256,
+					PSSWithSHA256,
+					PKCS1WithSHA256,
+					ECDSAWithP384AndSHA384,
+					PSSWithSHA384,
+					PKCS1WithSHA384,
+					PSSWithSHA512,
+					PKCS1WithSHA512,
+				}},
+				&SCTExtension{},
+				&KeyShareExtension{[]KeyShare{
+					{Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}},
+					{Group: X25519},
+				}},
+				&PSKKeyExchangeModesExtension{[]uint8{
+					PskModeDHE,
+				}},
+				&SupportedVersionsExtension{[]uint16{
+					GREASE_PLACEHOLDER,
+					VersionTLS13,
+					VersionTLS12,
+					VersionTLS11,
+					VersionTLS10,
+				}},
+				&FakeCertCompressionAlgsExtension{[]CertCompressionAlgo{
+					CertCompressionBrotli,
+				}},
+				&UtlsGREASEExtension{},
+				&UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle},
+			},
+		}, nil
 	case HelloFirefox_55, HelloFirefox_56:
 		return ClientHelloSpec{
 			TLSVersMax: VersionTLS12,

vendor/vendor.json

@@ -490,10 +490,10 @@
 			"revisionTime": "2019-09-09T20:29:46Z"
 		},
 		{
-			"checksumSHA1": "lovHeRrkvnia8JnLwyeIBYLa1Zk=",
+			"checksumSHA1": "1HFgQE+SHogT82ebPmvCUnGwrxo=",
 			"path": "github.com/refraction-networking/utls",
-			"revision": "43c36d3c1f57546d5cbb05c066df7b5a78686c51",
-			"revisionTime": "2019-09-09T20:06:33Z"
+			"revision": "ada0bb9b38a0975b15bb4591cd4a939fe74d1a1b",
+			"revisionTime": "2020-06-01T20:02:09Z"
 		},
 		{
 			"checksumSHA1": "Fn9JW8u40ABN9Uc9wuvquuyOB+8=",