Tag experimental function exports as experimental

ccryptolib/x25519.lua

@@ -42,5 +42,5 @@ end
 return {
     publicKey = publicKey,
     exchange = exchange,
-    exchangeEd = exchangeEd,
+    _EXPERIMENTAL_exchangeEd = exchangeEd,
 }

ccryptolib/x25519c.lua

@@ -203,13 +203,13 @@ local function sign(sk, pk, msg)
 end
 
 return {
-    maskX = maskX,
-    maskS = maskS,
-    remask = remask,
-    publicKeyX = publicKeyX,
-    ephemeralSk = ephemeralSk,
-    publicKeyS = publicKeyS,
-    exchangeX = exchangeX,
-    exchangeS = exchangeS,
-    sign = sign,
+    _EXPERIMENTAL_maskX = maskX,
+    _EXPERIMENTAL_maskS = maskS,
+    _EXPERIMENTAL_remask = remask,
+    _EXPERIMENTAL_publicKeyX = publicKeyX,
+    _EXPERIMENTAL_ephemeralSk = ephemeralSk,
+    _EXPERIMENTAL_publicKeyS = publicKeyS,
+    _EXPERIMENTAL_exchangeX = exchangeX,
+    _EXPERIMENTAL_exchangeS = exchangeS,
+    _EXPERIMENTAL_sign = sign,
 }

spec/x25519c_spec.lua

@@ -9,12 +9,12 @@ local x25519c = require "ccryptolib.x25519c"
 require "ccryptolib.random".init("mock initialization")
 
 local function exchange(sk, pk)
-    local sk = x25519c.maskX(sk)
-    sk = x25519c.remask(sk)
-    return (x25519c.exchangeX(sk, pk))
+    local sk = x25519c._EXPERIMENTAL_maskX(sk)
+    sk = x25519c._EXPERIMENTAL_remask(sk)
+    return (x25519c._EXPERIMENTAL_exchangeX(sk, pk))
 end
 
-describe("x25519c.exchangeX", function()
+describe("x25519c._EXPERIMENTAL_exchangeX", function()
     it("passes the section 5.2 test vector #1", function()
         local x = util.hexcat {
             "a546e36bf0527c9d3b16154b82465edd62144c0ac1fc5a18506a2244ba449ac4",