Description of problem:

obnam --lru-size=1024 --upload-queue-size=512 backup /home/nbecker
CRITICAL:root:Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/cliapp/app.py", line 173, in _run
    self.enable_plugins()
  File "/usr/lib/python2.7/site-packages/cliapp/app.py", line 526, in enable_plugins
    for plugin in self.pluginmgr.plugins:
  File "/usr/lib/python2.7/site-packages/cliapp/pluginmgr.py", line 75, in plugins
    self._plugins = self.load_plugins()
  File "/usr/lib/python2.7/site-packages/cliapp/pluginmgr.py", line 112, in load_plugins
    for plugin in self.load_plugin_file(pathname):
  File "/usr/lib/python2.7/site-packages/cliapp/pluginmgr.py", line 132, in load_plugin_file
    ('.py', 'r', imp.PY_SOURCE))
  File "/usr/lib64/python2.7/site-packages/obnamlib/plugins/sftp_plugin.py", line 31, in <module>
    import paramiko
  File "/usr/lib/python2.7/site-packages/paramiko/__init__.py", line 30, in <module>
    from paramiko.transport import SecurityOptions, Transport
  File "/usr/lib/python2.7/site-packages/paramiko/transport.py", line 53, in <module>
    from paramiko.dsskey import DSSKey
  File "/usr/lib/python2.7/site-packages/paramiko/dsskey.py", line 27, in <module>
    from cryptography.hazmat.primitives.asymmetric.utils import (
ImportError: cannot import name decode_dss_signature

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/cliapp/app.py", line 173, in _run
    self.enable_plugins()
  File "/usr/lib/python2.7/site-packages/cliapp/app.py", line 526, in enable_plugins
    for plugin in self.pluginmgr.plugins:
  File "/usr/lib/python2.7/site-packages/cliapp/pluginmgr.py", line 75, in plugins
    self._plugins = self.load_plugins()
  File "/usr/lib/python2.7/site-packages/cliapp/pluginmgr.py", line 112, in load_plugins
    for plugin in self.load_plugin_file(pathname):
  File "/usr/lib/python2.7/site-packages/cliapp/pluginmgr.py", line 132, in load_plugin_file
    ('.py', 'r', imp.PY_SOURCE))
  File "/usr/lib64/python2.7/site-packages/obnamlib/plugins/sftp_plugin.py", line 31, in <module>
    import paramiko
  File "/usr/lib/python2.7/site-packages/paramiko/__init__.py", line 30, in <module>
    from paramiko.transport import SecurityOptions, Transport
  File "/usr/lib/python2.7/site-packages/paramiko/transport.py", line 53, in <module>
    from paramiko.dsskey import DSSKey
  File "/usr/lib/python2.7/site-packages/paramiko/dsskey.py", line 27, in <module>
    from cryptography.hazmat.primitives.asymmetric.utils import (
ImportError: cannot import name decode_dss_signature

Version-Release number of selected component (if applicable):

f25 client and server

How reproducible:

100%

Steps to Reproduce:
1.
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Actual results:


Expected results:


Additional info: