annotate tests/sshprotoext.py @ 45933:2960b7fac966

setup: copy pythonXY.dll next to the hg.exe wrapper when building This avoids the problem of having the newly built binary complaining that it can't find the DLL. There is an option in the python.org installer to add the python install to PATH (which defaulted to "on" with py2, and therefore was not an issue up to this point), but that makes switching between python versions harder. This shouldn't be an issue with the PyOxidizer binary, but that current has issues running some of the tests, and took noticeably longer to build last time I tried it. Differential Revision: https://phab.mercurial-scm.org/D9362
author Matt Harbison <matt_harbison@yahoo.com>
date Sat, 21 Nov 2020 16:20:49 -0500
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children 6000f5b25c9b
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1 # sshprotoext.py - Extension to test behavior of SSH protocol
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2 #
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3 # Copyright 2018 Gregory Szorc <gregory.szorc@gmail.com>
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 # This extension replaces the SSH server started via `hg serve --stdio`.
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9 # The server behaves differently depending on environment variables.
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10
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11 from __future__ import absolute_import
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12
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13 from mercurial import (
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14 error,
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15 extensions,
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16 registrar,
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17 sshpeer,
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18 wireprotoserver,
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19 wireprotov1server,
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20 )
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21
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22 configtable = {}
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23 configitem = registrar.configitem(configtable)
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24
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25 configitem(b'sshpeer', b'mode', default=None)
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26 configitem(b'sshpeer', b'handshake-mode', default=None)
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27
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28
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29 class bannerserver(wireprotoserver.sshserver):
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30 """Server that sends a banner to stdout."""
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31
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32 def serve_forever(self):
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33 for i in range(10):
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34 self._fout.write(b'banner: line %d\n' % i)
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35
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36 super(bannerserver, self).serve_forever()
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37
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38
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39 class prehelloserver(wireprotoserver.sshserver):
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40 """Tests behavior when connecting to <0.9.1 servers.
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41
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42 The ``hello`` wire protocol command was introduced in Mercurial
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43 0.9.1. Modern clients send the ``hello`` command when connecting
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44 to SSH servers. This mock server tests behavior of the handshake
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45 when ``hello`` is not supported.
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46 """
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47
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48 def serve_forever(self):
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49 l = self._fin.readline()
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50 assert l == b'hello\n'
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51 # Respond to unknown commands with an empty reply.
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52 wireprotoserver._sshv1respondbytes(self._fout, b'')
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53 l = self._fin.readline()
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54 assert l == b'between\n'
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55 proto = wireprotoserver.sshv1protocolhandler(
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56 self._ui, self._fin, self._fout
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57 )
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58 rsp = wireprotov1server.dispatch(self._repo, proto, b'between')
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59 wireprotoserver._sshv1respondbytes(self._fout, rsp.data)
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60
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61 super(prehelloserver, self).serve_forever()
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62
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63
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64 def performhandshake(orig, ui, stdin, stdout, stderr):
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65 """Wrapped version of sshpeer._performhandshake to send extra commands."""
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66 mode = ui.config(b'sshpeer', b'handshake-mode')
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67 if mode == b'pre-no-args':
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68 ui.debug(b'sending no-args command\n')
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69 stdin.write(b'no-args\n')
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70 stdin.flush()
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71 return orig(ui, stdin, stdout, stderr)
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72 elif mode == b'pre-multiple-no-args':
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73 ui.debug(b'sending unknown1 command\n')
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74 stdin.write(b'unknown1\n')
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75 ui.debug(b'sending unknown2 command\n')
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76 stdin.write(b'unknown2\n')
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77 ui.debug(b'sending unknown3 command\n')
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78 stdin.write(b'unknown3\n')
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79 stdin.flush()
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80 return orig(ui, stdin, stdout, stderr)
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81 else:
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82 raise error.ProgrammingError(b'unknown HANDSHAKECOMMANDMODE: %s' % mode)
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83
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84
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85 def extsetup(ui):
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86 # It's easier for tests to define the server behavior via environment
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87 # variables than config options. This is because `hg serve --stdio`
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88 # has to be invoked with a certain form for security reasons and
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89 # `dummyssh` can't just add `--config` flags to the command line.
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90 servermode = ui.environ.get(b'SSHSERVERMODE')
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91
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92 if servermode == b'banner':
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93 wireprotoserver.sshserver = bannerserver
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94 elif servermode == b'no-hello':
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95 wireprotoserver.sshserver = prehelloserver
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96 elif servermode:
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97 raise error.ProgrammingError(b'unknown server mode: %s' % servermode)
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98
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99 peermode = ui.config(b'sshpeer', b'mode')
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100
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101 if peermode == b'extra-handshake-commands':
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102 extensions.wrapfunction(sshpeer, '_performhandshake', performhandshake)
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103 elif peermode:
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104 raise error.ProgrammingError(b'unknown peer mode: %s' % peermode)