Add an Encodable mixin that uses the encoder system

nacl/encoding.py

@@ -28,6 +28,13 @@ class Encoder(object):
 encoder = Encoder()
 
 
+class Encodable(object):
+
+    def encode(self, encoding="raw"):
+        data = bytes(self)
+        return encoder[encoding].encode(data)
+
+
 @encoder.register("raw")
 class RawEncoder(object):
 

nacl/signing.py

@@ -4,7 +4,7 @@ from __future__ import division
 from . import six
 
 from . import nacl
-from .encoding import encoder
+from .encoding import encoder, Encodable
 from .exceptions import CryptoError
 from .random import random
 
@@ -42,7 +42,7 @@ class SignedMessage(six.binary_type):
         return self._message
 
 
-class VerifyKey(object):
+class VerifyKey(Encodable, six.StringFixer, object):
     """
     The public key counterpart to an Ed25519 SigningKey for producing digital
     signatures.
@@ -60,6 +60,9 @@ class VerifyKey(object):
 
         self._key = key
 
+    def __bytes__(self):
+        return self._key
+
     def verify(self, smessage, signature=None, encoding="raw"):
         """
         Verifies the signature of a signed message, returning the message
@@ -89,7 +92,7 @@ class VerifyKey(object):
         return nacl.ffi.buffer(message, message_len[0])[:]
 
 
-class SigningKey(object):
+class SigningKey(Encodable, six.StringFixer, object):
     """
     Private key for producing digital signatures using the Ed25519 algorithm.
 
@@ -130,6 +133,9 @@ class SigningKey(object):
         # Public values
         self.verify_key = VerifyKey(nacl.ffi.buffer(pk, nacl.lib.crypto_sign_PUBLICKEYBYTES)[:])
 
+    def __bytes__(self):
+        return self._seed
+
     @classmethod
     def generate(cls):
         """