@@ -460,12 +460,14 @@ def key_specification_from_public_key(public_key):
:type public_key: cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey
:returns: Key algorithm and parameter(s) for generating same type of keys as the passed-in public key.
:rtype: tuple(str, int)
:rtype: tuple(str, int or cryptography.hazmat.primitives.asymmetric.ec.EllipticCurve)
:raises ValueError: If algorithm/parameters could not be derived from the passed-in public key.
"""
if isinstance(public_key, cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey):
return "rsa", public_key.key_size
elif isinstance(public_key, cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey):
return "ecdsa", type(public_key.curve)
raise ValueError("Unsupported public key instance passed-in: \"%s\" (%s)" % (str(public_key), type(public_key)))