mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-09-07 04:24:23 -04:00
170 lines
6.1 KiB
Go
170 lines
6.1 KiB
Go
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// Copyright 2017 Google Inc. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package tls
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import (
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"crypto/hmac"
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"crypto/sha512"
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"fmt"
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)
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// Naming convention:
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// Unsupported things are prefixed with "Fake"
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// Things, supported by utls, but not crypto/tls' are prefixed with "utls"
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// Supported things, that have changed their ID are prefixed with "Old"
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// Supported but disabled things are prefixed with "Disabled". We will _enable_ them.
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const (
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utlsExtensionPadding uint16 = 21
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utlsExtensionExtendedMasterSecret uint16 = 23 // https://tools.ietf.org/html/rfc7627
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// extensions with 'fake' prefix break connection, if server echoes them back
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fakeExtensionChannelID uint16 = 30032 // not IANA assigned
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fakeCertCompressionAlgs uint16 = 0x001b
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fakeRecordSizeLimit uint16 = 0x001c
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)
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const (
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OLD_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 = uint16(0xcc13)
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OLD_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 = uint16(0xcc14)
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DISABLED_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 = uint16(0xc024)
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DISABLED_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 = uint16(0xc028)
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DISABLED_TLS_RSA_WITH_AES_256_CBC_SHA256 = uint16(0x003d)
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FAKE_OLD_TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256 = uint16(0xcc15) // we can try to craft these ciphersuites
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FAKE_TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 = uint16(0x009e) // from existing pieces, if needed
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FAKE_TLS_DHE_RSA_WITH_AES_128_CBC_SHA = uint16(0x0033)
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FAKE_TLS_DHE_RSA_WITH_AES_256_CBC_SHA = uint16(0x0039)
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FAKE_TLS_RSA_WITH_RC4_128_MD5 = uint16(0x0004)
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FAKE_TLS_EMPTY_RENEGOTIATION_INFO_SCSV = uint16(0x00ff)
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)
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// newest signatures
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var (
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FakePKCS1WithSHA224 SignatureScheme = 0x0301
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FakeECDSAWithSHA224 SignatureScheme = 0x0303
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// fakeEd25519 = SignatureAndHash{0x08, 0x07}
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// fakeEd448 = SignatureAndHash{0x08, 0x08}
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)
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// fake curves(groups)
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var (
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FakeFFDHE2048 = uint16(0x0100)
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FakeFFDHE3072 = uint16(0x0101)
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)
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type ClientHelloID struct {
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Browser string
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Version uint16
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// TODO: consider adding OS?
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}
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func (p *ClientHelloID) Str() string {
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return fmt.Sprintf("%s-%d", p.Browser, p.Version)
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}
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const (
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helloGolang = "Golang"
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helloRandomized = "Randomized"
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helloCustom = "Custom"
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helloFirefox = "Firefox"
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helloChrome = "Chrome"
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helloIOS = "iOS"
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helloAndroid = "Android"
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)
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const (
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helloAutoVers = iota
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helloRandomizedALPN
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helloRandomizedNoALPN
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)
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type ClientHelloSpec struct {
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CipherSuites []uint16 // nil => default
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CompressionMethods []uint8 // nil => no compression
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Extensions []TLSExtension // nil => no extensions
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TLSVersMin uint16 // [1.0-1.3]
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TLSVersMax uint16 // [1.2-1.3]
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// GreaseStyle: currently only random
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// sessionID may or may not depend on ticket; nil => random
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GetSessionID func(ticket []byte) [32]byte
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// TLSFingerprintLink string // ?? link to tlsfingerprint.io for informational purposes
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}
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var (
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// HelloGolang will use default "crypto/tls" handshake marshaling codepath, which WILL
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// overwrite your changes to Hello(Config, Session are fine).
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// You might want to call BuildHandshakeState() before applying any changes.
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// UConn.Extensions will be completely ignored.
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HelloGolang = ClientHelloID{helloGolang, helloAutoVers}
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// HelloCustom will prepare ClientHello with empty uconn.Extensions so you can fill it with
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// TLSExtensions manually or use ApplyPreset function
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HelloCustom = ClientHelloID{helloCustom, helloAutoVers}
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// HelloRandomized* randomly adds/reorders extensions, ciphersuites, etc.
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HelloRandomized = ClientHelloID{helloRandomized, helloAutoVers}
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HelloRandomizedALPN = ClientHelloID{helloRandomized, helloRandomizedALPN}
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HelloRandomizedNoALPN = ClientHelloID{helloRandomized, helloRandomizedNoALPN}
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// The rest will will parrot given browser.
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HelloFirefox_Auto = HelloFirefox_63
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HelloFirefox_55 = ClientHelloID{helloFirefox, 55}
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HelloFirefox_56 = ClientHelloID{helloFirefox, 56}
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HelloFirefox_63 = ClientHelloID{helloFirefox, 63}
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HelloChrome_Auto = HelloChrome_70
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HelloChrome_58 = ClientHelloID{helloChrome, 58}
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HelloChrome_62 = ClientHelloID{helloChrome, 62}
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HelloChrome_70 = ClientHelloID{helloChrome, 70}
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HelloIOS_Auto = HelloIOS_11_1
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HelloIOS_11_1 = ClientHelloID{helloIOS, 111}
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)
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// based on spec's GreaseStyle, GREASE_PLACEHOLDER may be replaced by another GREASE value
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// https://tools.ietf.org/html/draft-ietf-tls-grease-01
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const GREASE_PLACEHOLDER = 0x0a0a
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// utlsMacSHA384 returns a SHA-384 based MAC. These are only supported in TLS 1.2
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// so the given version is ignored.
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func utlsMacSHA384(version uint16, key []byte) macFunction {
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return tls10MAC{h: hmac.New(sha512.New384, key)}
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}
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var utlsSupportedCipherSuites []*cipherSuite
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func init() {
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utlsSupportedCipherSuites = append(cipherSuites, []*cipherSuite{
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{OLD_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, 32, 0, 12, ecdheRSAKA,
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suiteECDHE | suiteTLS12 | suiteDefaultOff, nil, nil, aeadChaCha20Poly1305},
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{OLD_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, 32, 0, 12, ecdheECDSAKA,
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suiteECDHE | suiteECDSA | suiteTLS12 | suiteDefaultOff, nil, nil, aeadChaCha20Poly1305},
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}...)
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}
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// EnableWeakCiphers allows utls connections to continue in some cases, when weak cipher was chosen.
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// This provides better compatibility with servers on the web, but weakens security. Feel free
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// to use this option if you establish additional secure connection inside of utls connection.
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// This option does not change the shape of parrots (i.e. same ciphers will be offered either way).
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// Must be called before establishing any connections.
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func EnableWeakCiphers() {
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utlsSupportedCipherSuites = append(cipherSuites, []*cipherSuite{
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{DISABLED_TLS_RSA_WITH_AES_256_CBC_SHA256, 32, 32, 16, rsaKA,
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suiteTLS12 | suiteDefaultOff, cipherAES, macSHA256, nil},
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{DISABLED_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, 32, 48, 16, ecdheECDSAKA,
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suiteECDHE | suiteECDSA | suiteTLS12 | suiteDefaultOff | suiteSHA384, cipherAES, utlsMacSHA384, nil},
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{DISABLED_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, 32, 48, 16, ecdheRSAKA,
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suiteECDHE | suiteTLS12 | suiteDefaultOff | suiteSHA384, cipherAES, utlsMacSHA384, nil},
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}...)
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}
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