def __init__(self, access_key_id, secret_access_key, session_token=None):
assert isinstance_str(access_key_id)
assert isinstance_str(secret_access_key)
assert isinstance_str(session_token) or session_token is None
super(AwsCredentials, self).__init__()
self._binding = _awscrt.credentials_new(access_key_id, secret_access_key, session_token)
def __init__(self,
access_key_id,
secret_access_key,
session_token=None,
expiration=None):
assert isinstance(access_key_id, str)
assert isinstance(secret_access_key, str)
assert isinstance(session_token, str) or session_token is None
# C layer uses large int as timestamp for non-expiring credentials
if expiration is None:
expiration_timestamp = self._NONEXPIRING_TIMESTAMP
else:
expiration_timestamp = int(expiration.timestamp())
if expiration_timestamp < 0 or expiration_timestamp >= self._NONEXPIRING_TIMESTAMP:
raise OverflowError("expiration datetime out of range")
super().__init__()
self._binding = _awscrt.credentials_new(access_key_id,
secret_access_key,
session_token,
expiration_timestamp)