init

internal/faketls/x25519_fake.go

@@ -0,0 +1,27 @@
+package faketls
+
+import (
+	crand "crypto/rand"
+
+	"golang.org/x/crypto/curve25519"
+)
+
+// GenX25519PublicKey returns a valid X25519 public key (32 bytes) for the ClientHello key_share extension.
+// Some MTProxy builds validate the point; a random quadratic residue mod P (older telethon-faketls trick) is rejected.
+func GenX25519PublicKey() ([]byte, error) {
+	var priv, pub [32]byte
+	if _, err := crand.Read(priv[:]); err != nil {
+		return nil, err
+	}
+	curve25519.ScalarBaseMult(&pub, &priv)
+	return pub[:], nil
+}
+
+// Rand32 returns 32 random bytes (session id).
+func Rand32() ([]byte, error) {
+	b := make([]byte, 32)
+	if _, err := crand.Read(b); err != nil {
+		return nil, err
+	}
+	return b, nil
+}