def exchange(self, peer_public_key):
if not isinstance(peer_public_key, X25519PublicKey):
raise TypeError("peer_public_key must be X25519PublicKey.")
return _evp_pkey_derive(
self._backend, self._evp_pkey, peer_public_key
)
def exchange(self, peer_public_key):
if not isinstance(peer_public_key, X25519PublicKey):
raise TypeError("peer_public_key must be X25519PublicKey.")
return _evp_pkey_derive(
self._backend, self._evp_pkey, peer_public_key
)
def exchange(self, algorithm: ec.ECDH,
peer_public_key: ec.EllipticCurvePublicKey) -> bytes:
if not (self._backend.elliptic_curve_exchange_algorithm_supported(
algorithm, self.curve)):
raise UnsupportedAlgorithm(
"This backend does not support the ECDH algorithm.",
_Reasons.UNSUPPORTED_EXCHANGE_ALGORITHM,
)
if peer_public_key.curve.name != self.curve.name:
raise ValueError(
"peer_public_key and self are not on the same curve")
return _evp_pkey_derive(self._backend, self._evp_pkey, peer_public_key)
