def _parse_response(self):
response_length = unpack_int(self.socket.recv(4, socket.MSG_WAITALL))[0]
if response_length == 1:
raise ValueError("Agent failed")
response = self.socket.recv(response_length, socket.MSG_WAITALL)
status = ord(response[0])
if status != SSHAgent.SSH2_AGENT_SIGN_RESPONSE:
raise ValueError("Invalid response from agent")
_, remainder = unpack_int(response[1:])
_, remainder = unpack_string(remainder)
response, _ = unpack_string(remainder)
return response
def from_string(cls, key):
"""
Loads an RFC 4716 formatted public key.
"""
pubkey = cls()
if key.startswith('ssh-'):
pubkey.hashed = key.split()[1]
else:
pubkey.hashed = key
pubkey.key_type, remainder = unpack_string(pubkey.blob)
if pubkey.key_type == 'ssh-rsa':
e, n = get_packed_mp_ints(remainder, 2)
pubkey.instance = RSA.new_pub_key((e, n))
elif pubkey.key_type == 'ssh-dss':
p, q, g, y = get_packed_mp_ints(remainder, 4)
pubkey.instance = DSA.set_params(p, q, g)
return pubkey
