Prepare 0.3.0 release.

NEWS

@@ -1,6 +1,7 @@
-* Version 0.2.3 (unreleased)
- ** Bugfix: Don't use TimeoutError which isn't available on Python 2.
+* Version 0.3.0 (released 2018-04-13)
  ** Add conversion between string/int keys for AttestationObject.
+ ** Replace internal Exceptions with built-in types.
+ ** Bugfix: Don't use TimeoutError which isn't available on Python 2.
 
 * Version 0.2.2 (released 2018-04-11)
  ** Bugfix: Better handling of unplugged devices on MacOS and avoid leaking threads.

debian/changelog

@@ -1,4 +1,4 @@
-python-fido2 (0.2.3~dev) xenial; urgency=low
+python-fido2 (0.3.0) xenial; urgency=low
 
   * Build for ppa
 

fido2/__init__.py

@@ -37,4 +37,4 @@ class ABC(object):
     abc.abstractclassmethod = abc.abstractmethod
 
 
-__version__ = '0.2.3-dev0'
+__version__ = '0.3.0'

fido2/cose.py

@@ -107,3 +107,27 @@ def from_cryptography_key(cls, public_key):
             -1: int2bytes(pn.n),
             -2: int2bytes(pn.e)
         })
+
+
+class PS256(CoseKey):
+    ALGORITHM = -37
+
+    def verify(self, message, signature):
+        rsa.RSAPublicNumbers(
+            bytes2int(self[-2]), bytes2int(self[-1])
+        ).public_key(default_backend()).verify(
+            signature, message, padding.PSS(
+                mgf=padding.MGF1(hashes.SHA256()),
+                salt_length=padding.PSS.MAX_LENGTH
+            ), hashes.SHA256()
+        )
+
+    @classmethod
+    def from_cryptography_key(cls, public_key):
+        pn = public_key.public_numbers()
+        return cls({
+            1: 3,
+            3: cls.ALGORITHM,
+            -1: int2bytes(pn.n),
+            -2: int2bytes(pn.e)
+        })