Use x/crypto/hkdf

psiphon/common/accesscontrol/accesscontrol.go

@@ -56,8 +56,8 @@ import (
 	"time"
 
 	"github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common"
-	"github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/crypto/hkdf"
 	"github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/errors"
+	"golang.org/x/crypto/hkdf"
 )
 
 const (

psiphon/common/prng/prng.go

@@ -59,8 +59,8 @@ import (
 	"time"
 
 	"github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/crypto/Yawning/chacha20"
-	"github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/crypto/hkdf"
 	"github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/errors"
+	"golang.org/x/crypto/hkdf"
 )
 
 const (

psiphon/common/quic/obfuscator.go

@@ -30,9 +30,9 @@ import (
 	"time"
 
 	"github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/crypto/Yawning/chacha20"
-	"github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/crypto/hkdf"
 	"github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/errors"
 	"github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/prng"
+	"golang.org/x/crypto/hkdf"
 )
 
 const (