Problem: cyrptoconditions dependency updated because of vulnerability (…

…#2494)

* Problem: cyrptoconditions dependency updated because of vulnerability CVE-2018-10903

* update cc to ~=0.7.2

* Fix test using b58encode

* Fixing some more tests failing because of base58 update

bigchaindb/common/transaction.py

@@ -94,7 +94,7 @@ def to_dict(self):
         """
         try:
             fulfillment = self.fulfillment.serialize_uri()
-        except (TypeError, AttributeError, ASN1EncodeError):
+        except (TypeError, AttributeError, ASN1EncodeError, ASN1DecodeError):
             fulfillment = _fulfillment_to_details(self.fulfillment)
 
         try:
@@ -161,7 +161,7 @@ def _fulfillment_to_details(fulfillment):
     if fulfillment.type_name == 'ed25519-sha-256':
         return {
             'type': 'ed25519-sha-256',
-            'public_key': base58.b58encode(fulfillment.public_key),
+            'public_key': base58.b58encode(fulfillment.public_key).decode(),
         }
 
     if fulfillment.type_name == 'threshold-sha-256':

bigchaindb/upsert_validator/validator_election.py

@@ -172,7 +172,7 @@ def transfer(cls, tx_signers, recipients, metadata=None, asset=None):
 
     @classmethod
     def to_public_key(cls, election_id):
-        return base58.b58encode(bytes.fromhex(election_id))
+        return base58.b58encode(bytes.fromhex(election_id)).decode()
 
     @classmethod
     def count_votes(cls, election_pk, transactions, getter=getattr):

setup.py

@@ -79,7 +79,7 @@ def check_setuptools_features():
     # TODO Consider not installing the db drivers, or putting them in extras.
     'pymongo~=3.6',
     'pysha3~=1.0.2',
-    'cryptoconditions~=0.6.0.dev',
+    'cryptoconditions~=0.7.2',
     'python-rapidjson~=0.6.0',
     'logstats~=0.2.1',
     'flask>=0.10.1',

tests/common/test_transaction.py

@@ -93,7 +93,7 @@ def test_output_serialization(user_Ed25519, user_pub):
             'uri': user_Ed25519.condition_uri,
             'details': {
                 'type': 'ed25519-sha-256',
-                'public_key': b58encode(user_Ed25519.public_key),
+                'public_key': b58encode(user_Ed25519.public_key).decode(),
             },
         },
         'public_keys': [user_pub],
@@ -114,7 +114,7 @@ def test_output_deserialization(user_Ed25519, user_pub):
             'uri': user_Ed25519.condition_uri,
             'details': {
                 'type': 'ed25519-sha-256',
-                'public_key': b58encode(user_Ed25519.public_key),
+                'public_key': b58encode(user_Ed25519.public_key).decode(),
             },
         },
         'public_keys': [user_pub],