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# Copyright (c) Twisted Matrix Laboratories. # See LICENSE for details. """ An error to represent bad things happening in Conch. Maintainer: Paul Swartz """ from twisted.cred.error import UnauthorizedLogin class ConchError(Exception): def __init__(self, value, data=None): Exception.__init__(self, value, data) self.value = value self.data = data class NotEnoughAuthentication(Exception): """ This is thrown if the authentication is valid, but is not enough to successfully verify the user. i.e. don't retry this type of authentication, try another one. """ class ValidPublicKey(UnauthorizedLogin): """ Raised by public key checkers when they receive public key credentials that don't contain a signature at all, but are valid in every other way. (e.g. the public key matches one in the user's authorized_keys file). Protocol code (eg L{SSHUserAuthServer<twisted.conch.ssh.userauth.SSHUserAuthServer>}) which attempts to log in using L{ISSHPrivateKey<twisted.cred.credentials.ISSHPrivateKey>} credentials should be prepared to handle a failure of this type by telling the user to re-authenticate using the same key and to include a signature with the new attempt. See U{http://www.ietf.org/rfc/rfc4252.txt} section 7 for more details. """ class IgnoreAuthentication(Exception): """ This is thrown to let the UserAuthServer know it doesn't need to handle the authentication anymore. """ class MissingKeyStoreError(Exception): """ Raised if an SSHAgentServer starts receiving data without its factory providing a keys dict on which to read/write key data. """ class UserRejectedKey(Exception): """ The user interactively rejected a key. """ class InvalidEntry(Exception): """ An entry in a known_hosts file could not be interpreted as a valid entry. """ class HostKeyChanged(Exception): """ The host key of a remote host has changed. @ivar offendingEntry: The entry which contains the persistent host key that disagrees with the given host key. @type offendingEntry: L{twisted.conch.interfaces.IKnownHostEntry} @ivar path: a reference to the known_hosts file that the offending entry was loaded from @type path: L{twisted.python.filepath.FilePath} @ivar lineno: The line number of the offending entry in the given path. @type lineno: L{int} """ def __init__(self, offendingEntry, path, lineno): Exception.__init__(self) self.offendingEntry = offendingEntry self.path = path self.lineno = lineno