core sts endpoints completed

moto/sts/models.py

@@ -0,0 +1,39 @@
+import datetime
+from moto.core import BaseBackend
+from moto.core.utils import iso_8601_datetime
+
+
+class Token(object):
+    def __init__(self, duration):
+        now = datetime.datetime.now()
+        self.expiration = now + datetime.timedelta(seconds=duration)
+
+    @property
+    def expiration_ISO8601(self):
+        return iso_8601_datetime(self.expiration)
+
+
+class AssumedRole(object):
+    def __init__(self, role_session_name, role_arn, policy, duration, external_id):
+        self.session_name = role_session_name
+        self.arn = role_arn
+        self.policy = policy
+        now = datetime.datetime.now()
+        self.expiration = now + datetime.timedelta(seconds=duration)
+        self.external_id = external_id
+
+    @property
+    def expiration_ISO8601(self):
+        return iso_8601_datetime(self.expiration)
+
+
+class STSBackend(BaseBackend):
+    def get_session_token(self, duration):
+        token = Token(duration=duration)
+        return token
+
+    def assume_role(self, **kwargs):
+        role = AssumedRole(**kwargs)
+        return role
+
+sts_backend = STSBackend()