catacomb/__init__.py: Add `beginhash', `endhash' to the EdDSA interface.

This is consistent with the other DSA-ish classes.

diff --git a/catacomb/__init__.py b/catacomb/__init__.py
index 7ac5baf91383fba7f4f55635b7a4b55f6826aa3e..b9818e71a7eb3c717f538a82f0f24c21964c21fb 100644 (file)
--- a/catacomb/__init__.py
+++ b/catacomb/__init__.py
@@ -892,13 +892,15 @@ class X448Priv (_XDHPriv, X448Pub):
   ##def _hashkey(me, z): return ???
 
 class _EdDSAPub (_BasePub):
-  pass
+  def beginhash(me): return me._HASH()
+  def endhash(me, h): return h.done()
 
 class _EdDSAPriv (_BasePriv, _EdDSAPub):
   pass
 
 class Ed25519Pub (_EdDSAPub):
   _PUBSZ = KeySZSet(ED25519_PUBSZ)
+  _HASH = sha512
   def verify(me, msg, sig):
     return ed25519_verify(me.pub, msg, sig)