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# Copyright (C) 2005 Robey Pointer <robey@lag.net>, Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""
A stub SFTP server for loopback SFTP testing.
Adapted from the one in paramiko's unit tests.
"""
import os
from paramiko import ServerInterface, SFTPServerInterface, SFTPServer, SFTPAttributes, \
SFTPHandle, SFTP_OK, AUTH_SUCCESSFUL, OPEN_SUCCEEDED
import sys
from bzrlib.osutils import pathjoin
from bzrlib.trace import mutter
class StubServer (ServerInterface):
def __init__(self, test_case):
ServerInterface.__init__(self)
self._test_case = test_case
def check_auth_password(self, username, password):
# all are allowed
self._test_case.log('sftpserver - authorizing: %s' % (username,))
return AUTH_SUCCESSFUL
def check_channel_request(self, kind, chanid):
self._test_case.log('sftpserver - channel request: %s, %s' % (kind, chanid))
return OPEN_SUCCEEDED
class StubSFTPHandle (SFTPHandle):
def stat(self):
try:
return SFTPAttributes.from_stat(os.fstat(self.readfile.fileno()))
except OSError, e:
return SFTPServer.convert_errno(e.errno)
def chattr(self, attr):
# python doesn't have equivalents to fchown or fchmod, so we have to
# use the stored filename
mutter('Changing permissions on %s to %s', self.filename, attr)
try:
SFTPServer.set_file_attr(self.filename, attr)
except OSError, e:
return SFTPServer.convert_errno(e.errno)
class StubSFTPServer (SFTPServerInterface):
def __init__(self, server, root, home=None):
SFTPServerInterface.__init__(self, server)
# All paths are actually relative to 'root'.
# this is like implementing chroot().
self.root = root
if home is None:
self.home = ''
else:
if not home.startswith(self.root):
raise AssertionError(
"home must be a subdirectory of root (%s vs %s)"
% (home, root))
self.home = home[len(self.root):]
if self.home.startswith('/'):
self.home = self.home[1:]
server._test_case.log('sftpserver - new connection')
def _realpath(self, path):
# paths returned from self.canonicalize() always start with
# a path separator. So if 'root' is just '/', this would cause
# a double slash at the beginning '//home/dir'.
if self.root == '/':
return self.canonicalize(path)
return self.root + self.canonicalize(path)
if sys.platform == 'win32':
def canonicalize(self, path):
# Win32 sftp paths end up looking like
# sftp://host@foo/h:/foo/bar
# which means absolute paths look like:
# /h:/foo/bar
# and relative paths stay the same:
# foo/bar
# win32 needs to use the Unicode APIs. so we require the
# paths to be utf8 (Linux just uses bytestreams)
thispath = path.decode('utf8')
if path.startswith('/'):
# Abspath H:/foo/bar
return os.path.normpath(thispath[1:])
else:
return os.path.normpath(os.path.join(self.home, thispath))
else:
def canonicalize(self, path):
if os.path.isabs(path):
return os.path.normpath(path)
else:
return os.path.normpath('/' + os.path.join(self.home, path))
def chattr(self, path, attr):
try:
SFTPServer.set_file_attr(path, attr)
except OSError, e:
return SFTPServer.convert_errno(e.errno)
return SFTP_OK
def list_folder(self, path):
path = self._realpath(path)
try:
out = [ ]
# TODO: win32 incorrectly lists paths with non-ascii if path is not
# unicode. However on Linux the server should only deal with
# bytestreams and posix.listdir does the right thing
if sys.platform == 'win32':
flist = [f.encode('utf8') for f in os.listdir(path)]
else:
flist = os.listdir(path)
for fname in flist:
attr = SFTPAttributes.from_stat(os.stat(pathjoin(path, fname)))
attr.filename = fname
out.append(attr)
return out
except OSError, e:
return SFTPServer.convert_errno(e.errno)
def stat(self, path):
path = self._realpath(path)
try:
return SFTPAttributes.from_stat(os.stat(path))
except OSError, e:
return SFTPServer.convert_errno(e.errno)
def lstat(self, path):
path = self._realpath(path)
try:
return SFTPAttributes.from_stat(os.lstat(path))
except OSError, e:
return SFTPServer.convert_errno(e.errno)
def open(self, path, flags, attr):
path = self._realpath(path)
try:
flags |= getattr(os, 'O_BINARY', 0)
if getattr(attr, 'st_mode', None):
fd = os.open(path, flags, attr.st_mode)
else:
# os.open() defaults to 0777 which is
# an odd default mode for files
fd = os.open(path, flags, 0666)
except OSError, e:
return SFTPServer.convert_errno(e.errno)
if (flags & os.O_CREAT) and (attr is not None):
attr._flags &= ~attr.FLAG_PERMISSIONS
SFTPServer.set_file_attr(path, attr)
if flags & os.O_WRONLY:
fstr = 'wb'
elif flags & os.O_RDWR:
fstr = 'rb+'
else:
# O_RDONLY (== 0)
fstr = 'rb'
try:
f = os.fdopen(fd, fstr)
except (IOError, OSError), e:
return SFTPServer.convert_errno(e.errno)
fobj = StubSFTPHandle()
fobj.filename = path
fobj.readfile = f
fobj.writefile = f
return fobj
def remove(self, path):
path = self._realpath(path)
try:
os.remove(path)
except OSError, e:
return SFTPServer.convert_errno(e.errno)
return SFTP_OK
def rename(self, oldpath, newpath):
oldpath = self._realpath(oldpath)
newpath = self._realpath(newpath)
try:
os.rename(oldpath, newpath)
except OSError, e:
return SFTPServer.convert_errno(e.errno)
return SFTP_OK
def mkdir(self, path, attr):
path = self._realpath(path)
try:
# Using getattr() in case st_mode is None or 0
# both evaluate to False
if getattr(attr, 'st_mode', None):
os.mkdir(path, attr.st_mode)
else:
os.mkdir(path)
if attr is not None:
attr._flags &= ~attr.FLAG_PERMISSIONS
SFTPServer.set_file_attr(path, attr)
except OSError, e:
return SFTPServer.convert_errno(e.errno)
return SFTP_OK
def rmdir(self, path):
path = self._realpath(path)
try:
os.rmdir(path)
except OSError, e:
return SFTPServer.convert_errno(e.errno)
return SFTP_OK
# removed: chattr, symlink, readlink
# (nothing in bzr's sftp transport uses those)
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