% ipa cert-request --principal alice alicereq.der 
ipa: ERROR: UnicodeDecodeError: 'utf8' codec can't decode byte 0x82 in position 1: invalid start byte
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/ipalib/cli.py", line 1345, in run
    sys.exit(api.Backend.cli.run(argv))
  File "/usr/lib/python2.7/site-packages/ipalib/cli.py", line 1103, in run
    kw = self.process_keyword_arguments(cmd, kw)
  File "/usr/lib/python2.7/site-packages/ipalib/cli.py", line 1091, in process_keyword_arguments
    self.load_files(cmd, kw)
  File "/usr/lib/python2.7/site-packages/ipalib/cli.py", line 1305, in load_files
    kw[p.name] = self.Backend.textui.decode(raw)
  File "/usr/lib/python2.7/site-packages/ipalib/cli.py", line 140, in decode
    return value.decode(encoding)
  File "/usr/lib64/python2.7/encodings/utf_8.py", line 16, in decode
    return codecs.utf_8_decode(input, errors, True)
UnicodeDecodeError: 'utf8' codec can't decode byte 0x82 in position 1: invalid start byte
ipa: ERROR: an internal error has occurred