Digital Ocean SSH keys error while decoding Base64.

[pmarques]

SUMMARY

Python 3 base64 decodestring expects a bytes-like object, not a string.

TypeError: expected bytes-like object, not str

ISSUE TYPE

• Bugfix Pull Request

COMPONENT NAME

digital_ocean_sshkey.py

ANSIBLE VERSION

ansible 2.4.3.0

previous versions are also affected.

ADDITIONAL INFORMATION

Full stack trace when running with python 3

Traceback (most recent call last):
  File "/var/folders/3w/knmcr7_d49183rwvzq_mfmlm0000gn/T/ansible_64vql_7d/ansible_module_digital_ocean_sshkey.py", line 272, in <module>
    main()
  File "/var/folders/3w/knmcr7_d49183rwvzq_mfmlm0000gn/T/ansible_64vql_7d/ansible_module_digital_ocean_sshkey.py", line 268, in main
    core(module)
  File "/var/folders/3w/knmcr7_d49183rwvzq_mfmlm0000gn/T/ansible_64vql_7d/ansible_module_digital_ocean_sshkey.py", line 171, in core
    fingerprint = fingerprint or ssh_key_fingerprint(ssh_pub_key)
  File "/var/folders/3w/knmcr7_d49183rwvzq_mfmlm0000gn/T/ansible_64vql_7d/ansible_module_digital_ocean_sshkey.py", line 239, in ssh_key_fingerprint
    base64.decodestring(key)
  File "/usr/local/Cellar/python/3.6.4_3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/base64.py", line 561, in decodestring
    return decodebytes(s)
  File "/usr/local/Cellar/python/3.6.4_3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/base64.py", line 552, in decodebytes
    _input_type_check(s)
  File "/usr/local/Cellar/python/3.6.4_3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/base64.py", line 520, in _input_type_check
    raise TypeError(msg) from err
TypeError: expected bytes-like object, not str

[ansibot]

cc @BondAnthony @alukovenko @mgregson
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[BondAnthony]

LGTM

@pmarques thank you!