transports/meeklite: Use a modified version of utls

Changes:
 * Use a fork of utls with some compatibility improvements.
 * Switch the default ClientHello profile to `HelloFirefox_Auto`.
 * Add the `HelloChrome_71` profile.

The existing `HelloFirefox_Auto` profile that points to
`HelloFirefox_63` also matches the (common) behavior of Firefox 65,
assuming that 3DES ciphersuites are not disabled.

README.md

@@ -37,7 +37,7 @@ the same dependency versions, while `go get -d` always downloads master.
 
  * Go 1.11.0 or later. Patches to support up to 2 prior major releases will
    be accepted if they are not overly intrusive and well written.
- * See `go.mod` for build time dependencies.
+ * See `go.mod`, `go.sum` and `go list -m -u all` for build time dependencies.
 
 ### Installation
 

go.mod

@@ -4,9 +4,8 @@ require (
 	git.torproject.org/pluggable-transports/goptlib.git v0.0.0-20190117054722-15f83653abbc
 	github.com/agl/ed25519 v0.0.0-20170116200512-5312a6153412
 	github.com/dchest/siphash v1.2.1
-	github.com/refraction-networking/utls v0.0.0-20190105024908-a89e7e6da482
-	golang.org/x/crypto v0.0.0-20190103213133-ff983b9c42bc
+	gitlab.com/yawning/utls.git v0.0.9-1
+	golang.org/x/crypto v0.0.0-20190131182504-b8fe1690c613
 	golang.org/x/net v0.0.0-20190119204137-ed066c81e75e
-	golang.org/x/sys v0.0.0-20190116161447-11f53e031339 // indirect
 	golang.org/x/text v0.3.0 // indirect
 )

go.sum

@@ -4,13 +4,15 @@ github.com/agl/ed25519 v0.0.0-20170116200512-5312a6153412 h1:w1UutsfOrms1J05zt7I
 github.com/agl/ed25519 v0.0.0-20170116200512-5312a6153412/go.mod h1:WPjqKcmVOxf0XSf3YxCJs6N6AOSrOx3obionmG7T0y0=
 github.com/dchest/siphash v1.2.1 h1:4cLinnzVJDKxTCl9B01807Yiy+W7ZzVHj/KIroQRvT4=
 github.com/dchest/siphash v1.2.1/go.mod h1:q+IRvb2gOSrUnYoPqHiyHXS0FOBBOdl6tONBlVnOnt4=
-github.com/refraction-networking/utls v0.0.0-20190105024908-a89e7e6da482 h1:mP4Zgxxydw8ljKIA3zHWmzrTKizyULi7vQrRtxqQNmo=
-github.com/refraction-networking/utls v0.0.0-20190105024908-a89e7e6da482/go.mod h1:tz9gX959MEFfFN5whTIocCLUG57WiILqtdVxI8c6Wj0=
-golang.org/x/crypto v0.0.0-20190103213133-ff983b9c42bc h1:F5tKCVGp+MUAHhKp5MZtGqAlGX3+oCsiL1Q629FL90M=
-golang.org/x/crypto v0.0.0-20190103213133-ff983b9c42bc/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+github.com/dsnet/compress v0.0.0-20171208185109-cc9eb1d7ad76 h1:eX+pdPPlD279OWgdx7f6KqIRSONuK7egk+jDx7OM3Ac=
+github.com/dsnet/compress v0.0.0-20171208185109-cc9eb1d7ad76/go.mod h1:KjxHHirfLaw19iGT70HvVjHQsL1vq1SRQB4yOsAfy2s=
+gitlab.com/yawning/utls.git v0.0.9-1 h1:qM3iQLFVKtBPP4THo7QQvHZanP2Vk9jAgDZaUTsAuE4=
+gitlab.com/yawning/utls.git v0.0.9-1/go.mod h1:PuJDGdGVFPpgc2evhLjHRgl5ZN2sItpDiydweKFYtuc=
+golang.org/x/crypto v0.0.0-20190131182504-b8fe1690c613 h1:MQ/ZZiDsUapFFiMS+vzwXkCTeEKaum+Do5rINYJDmxc=
+golang.org/x/crypto v0.0.0-20190131182504-b8fe1690c613/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/net v0.0.0-20190119204137-ed066c81e75e h1:MDa3fSUp6MdYHouVmCCNz/zaH2a6CRcxY3VhT/K3C5Q=
 golang.org/x/net v0.0.0-20190119204137-ed066c81e75e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/sys v0.0.0-20190116161447-11f53e031339 h1:g/Jesu8+QLnA0CPzF3E1pURg0Byr7i6jLoX5sqjcAh0=
-golang.org/x/sys v0.0.0-20190116161447-11f53e031339/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190201152629-afcc84fd7533 h1:bLfqnzrpeG4usq5OvMCrwTdmMJ6aTmlCuo1eKl0mhkI=
+golang.org/x/sys v0.0.0-20190201152629-afcc84fd7533/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

transports/meeklite/meek.go

@@ -44,10 +44,9 @@ import (
 	"sync"
 	"time"
 
-	utls "github.com/refraction-networking/utls"
-
 	"git.torproject.org/pluggable-transports/goptlib.git"
 	"gitlab.com/yawning/obfs4.git/transports/base"
+	utls "gitlab.com/yawning/utls.git"
 )
 
 const (

transports/meeklite/transport.go

@@ -28,10 +28,9 @@ import (
 	"strings"
 	"sync"
 
-	utls "github.com/refraction-networking/utls"
-	"golang.org/x/net/http2"
-
 	"gitlab.com/yawning/obfs4.git/transports/base"
+	utls "gitlab.com/yawning/utls.git"
+	"golang.org/x/net/http2"
 )
 
 var (
@@ -51,10 +50,11 @@ var (
 		"hellochrome_58":        &utls.HelloChrome_58,
 		"hellochrome_62":        &utls.HelloChrome_62,
 		"hellochrome_70":        &utls.HelloChrome_70,
+		"hellochrome_71":        &utls.HelloChrome_71,
 		"helloios_auto":         &utls.HelloIOS_Auto,
 		"helloios_11_1":         &utls.HelloIOS_11_1,
 	}
-	defaultClientHello = &utls.HelloChrome_Auto
+	defaultClientHello = &utls.HelloFirefox_Auto
 )
 
 type roundTripper struct {