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