116 lines
3.4 KiB
Python
116 lines
3.4 KiB
Python
# Copyright (C) 2011 Jeff Forcier <jeff@bitprophet.org>
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#
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# This file is part of ssh.
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#
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# 'ssh' is free software; you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation; either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# 'ssh' is distrubuted in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with 'ssh'; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA.
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"""
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Exceptions defined by ssh.
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"""
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class SSHException (Exception):
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"""
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Exception raised by failures in SSH2 protocol negotiation or logic errors.
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"""
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pass
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class AuthenticationException (SSHException):
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"""
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Exception raised when authentication failed for some reason. It may be
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possible to retry with different credentials. (Other classes specify more
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specific reasons.)
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@since: 1.6
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"""
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pass
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class PasswordRequiredException (AuthenticationException):
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"""
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Exception raised when a password is needed to unlock a private key file.
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"""
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pass
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class BadAuthenticationType (AuthenticationException):
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"""
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Exception raised when an authentication type (like password) is used, but
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the server isn't allowing that type. (It may only allow public-key, for
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example.)
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@ivar allowed_types: list of allowed authentication types provided by the
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server (possible values are: C{"none"}, C{"password"}, and
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C{"publickey"}).
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@type allowed_types: list
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@since: 1.1
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"""
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allowed_types = []
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def __init__(self, explanation, types):
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AuthenticationException.__init__(self, explanation)
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self.allowed_types = types
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def __str__(self):
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return SSHException.__str__(self) + ' (allowed_types=%r)' % self.allowed_types
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class PartialAuthentication (AuthenticationException):
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"""
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An internal exception thrown in the case of partial authentication.
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"""
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allowed_types = []
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def __init__(self, types):
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AuthenticationException.__init__(self, 'partial authentication')
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self.allowed_types = types
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class ChannelException (SSHException):
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"""
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Exception raised when an attempt to open a new L{Channel} fails.
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@ivar code: the error code returned by the server
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@type code: int
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@since: 1.6
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"""
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def __init__(self, code, text):
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SSHException.__init__(self, text)
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self.code = code
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class BadHostKeyException (SSHException):
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"""
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The host key given by the SSH server did not match what we were expecting.
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@ivar hostname: the hostname of the SSH server
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@type hostname: str
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@ivar key: the host key presented by the server
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@type key: L{PKey}
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@ivar expected_key: the host key expected
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@type expected_key: L{PKey}
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@since: 1.6
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"""
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def __init__(self, hostname, got_key, expected_key):
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SSHException.__init__(self, 'Host key for server %s does not match!' % hostname)
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self.hostname = hostname
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self.key = got_key
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self.expected_key = expected_key
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