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Implement consistent randomized fingerprint (#20)

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- Uses a chacha20-based CSPRNG to generate randomized fingeprints
 - Refactors generation of randomized fingerprints, removing many redundant shuffle functions.
 - Adds Seed field to ClientHelloID
 - ClientHelloID.Version is now a string (was uint16)
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sergeyfrolov 2019-03-06 16:14:34 -07:00 • committed by GitHub
parent 1188641a16
commit 7c97cdb476
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8 changed files with 442 additions and 215 deletions
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66
u_common.go
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@ -59,29 +59,39 @@ var (
)
type ClientHelloID struct {
Browser string
Version uint16
// TODO: consider adding OS?
Client string
// Version specifies version of a mimicked clients (e.g. browsers).
// Not used in randomized, custom handshake, and default Go.
Version string
// Seed is only used for randomized fingerprints to seed PRNG.
// Must not be modified once set.
Seed *PRNGSeed
}
func (p *ClientHelloID) Str() string {
return fmt.Sprintf("%s-%d", p.Browser, p.Version)
return fmt.Sprintf("%s-%s", p.Client, p.Version)
}
func (p *ClientHelloID) IsSet() bool {
return (p.Client == "") && (p.Version == "")
}
const (
helloGolang = "Golang"
helloRandomized = "Randomized"
helloCustom = "Custom"
helloFirefox = "Firefox"
helloChrome = "Chrome"
helloIOS = "iOS"
helloAndroid = "Android"
)
// clients
helloGolang = "Golang"
helloRandomized = "Randomized"
helloRandomizedALPN = "Randomized-ALPN"
helloRandomizedNoALPN = "Randomized-NoALPN"
helloCustom = "Custom"
helloFirefox = "Firefox"
helloChrome = "Chrome"
helloIOS = "iOS"
helloAndroid = "Android"
const (
helloAutoVers = iota
helloRandomizedALPN
helloRandomizedNoALPN
// versions
helloAutoVers = "0"
)
type ClientHelloSpec struct {
@ -104,30 +114,30 @@ var (
// overwrite your changes to Hello(Config, Session are fine).
// You might want to call BuildHandshakeState() before applying any changes.
// UConn.Extensions will be completely ignored.
HelloGolang = ClientHelloID{helloGolang, helloAutoVers}
HelloGolang = ClientHelloID{helloGolang, helloAutoVers, nil}
// HelloCustom will prepare ClientHello with empty uconn.Extensions so you can fill it with
// TLSExtensions manually or use ApplyPreset function
HelloCustom = ClientHelloID{helloCustom, helloAutoVers}
HelloCustom = ClientHelloID{helloCustom, helloAutoVers, nil}
// HelloRandomized* randomly adds/reorders extensions, ciphersuites, etc.
HelloRandomized = ClientHelloID{helloRandomized, helloAutoVers}
HelloRandomizedALPN = ClientHelloID{helloRandomized, helloRandomizedALPN}
HelloRandomizedNoALPN = ClientHelloID{helloRandomized, helloRandomizedNoALPN}
HelloRandomized = ClientHelloID{helloRandomized, helloAutoVers, nil}
HelloRandomizedALPN = ClientHelloID{helloRandomizedALPN, helloAutoVers, nil}
HelloRandomizedNoALPN = ClientHelloID{helloRandomizedNoALPN, helloAutoVers, nil}
// The rest will will parrot given browser.
HelloFirefox_Auto = HelloFirefox_63
HelloFirefox_55 = ClientHelloID{helloFirefox, 55}
HelloFirefox_56 = ClientHelloID{helloFirefox, 56}
HelloFirefox_63 = ClientHelloID{helloFirefox, 63}
HelloFirefox_55 = ClientHelloID{helloFirefox, "55", nil}
HelloFirefox_56 = ClientHelloID{helloFirefox, "56", nil}
HelloFirefox_63 = ClientHelloID{helloFirefox, "63", nil}
HelloChrome_Auto = HelloChrome_70
HelloChrome_58 = ClientHelloID{helloChrome, 58}
HelloChrome_62 = ClientHelloID{helloChrome, 62}
HelloChrome_70 = ClientHelloID{helloChrome, 70}
HelloChrome_58 = ClientHelloID{helloChrome, "58", nil}
HelloChrome_62 = ClientHelloID{helloChrome, "62", nil}
HelloChrome_70 = ClientHelloID{helloChrome, "70", nil}
HelloIOS_Auto = HelloIOS_11_1
HelloIOS_11_1 = ClientHelloID{helloIOS, 111}
HelloIOS_11_1 = ClientHelloID{helloIOS, "111", nil}
)
// based on spec's GreaseStyle, GREASE_PLACEHOLDER may be replaced by another GREASE value