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# Copyright (C) 2003-2006 Robey Pointer <robey@lag.net>
#
# This file is part of paramiko.
#
# Paramiko is free software; you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation; either version 2.1 of the License, or (at your option)
# any later version.
#
# Paramiko is distrubuted in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Paramiko; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
Exceptions defined by paramiko.
"""
class SSHException (Exception):
"""
Exception raised by failures in SSH2 protocol negotiation or logic errors.
"""
pass
class AuthenticationException (SSHException):
"""
Exception raised when authentication failed for some reason. It may be
possible to retry with different credentials. (Other classes specify more
specific reasons.)
@since: 1.6
"""
pass
class PasswordRequiredException (AuthenticationException):
"""
Exception raised when a password is needed to unlock a private key file.
"""
pass
class BadAuthenticationType (AuthenticationException):
"""
Exception raised when an authentication type (like password) is used, but
the server isn't allowing that type. (It may only allow public-key, for
example.)
@ivar allowed_types: list of allowed authentication types provided by the
server (possible values are: C{"none"}, C{"password"}, and
C{"publickey"}).
@type allowed_types: list
@since: 1.1
"""
allowed_types = []
def __init__(self, explanation, types):
SSHException.__init__(self, explanation)
self.allowed_types = types
def __str__(self):
return SSHException.__str__(self) + ' (allowed_types=%r)' % self.allowed_types
class PartialAuthentication (AuthenticationException):
"""
An internal exception thrown in the case of partial authentication.
"""
allowed_types = []
def __init__(self, types):
SSHException.__init__(self, 'partial authentication')
self.allowed_types = types
class ChannelException (SSHException):
"""
Exception raised when an attempt to open a new L{Channel} fails.
@ivar code: the error code returned by the server
@type code: int
@since: 1.6
"""
def __init__(self, code, text):
SSHException.__init__(self, text)
self.code = code
class BadHostKeyException (SSHException):
"""
The host key given by the SSH server did not match what we were expecting.
@ivar hostname: the hostname of the SSH server
@type hostname: str
@ivar key: the host key presented by the server
@type key: L{PKey}
@ivar expected_key: the host key expected
@type expected_key: L{PKey}
@since: 1.6
"""
def __init__(self, hostname, got_key, expected_key):
SSHException.__init__(self, 'Host key for server %s does not match!' % hostname)
self.hostname = hostname
self.key = got_key
self.expected_key = expected_key
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