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2efb692cc4
* known_hosts: support --diff
* known_hosts: support --diff also without --check
* Add unit tests and fix incorrect diff in one corner case
Tests are good!
* Refactor for readability
* Python 3 compat
* More Python 3 compat
* Add an integration test for known_hosts
* Handle ssh-keygen -HF returning non-zero exit code
AFAICT this is a bug in ssh-keygen in some newer OpenSSH versions
(>= 6.4 probably; see commit dd9d5cc670):
when you invoke ssh-keygen with -H and -F <host> options, it always
returns exit code 1. This is because in ssh-keygen.c there's a function
do_known_hosts() which calls
exit (find_host && !ctx.found_key);
at the end, and find_host is 1 (because we passed -F on the command line),
but ctx.found_key is always 0. Why is found_key always 0? Because the
callback passed to hostkeys_foreach(), which is known_hosts_hash(),
never bothers to set found_key to 1.
* This test does not need root
* Avoid ssh-ed25519 keys in sample known_hosts file
Older versions of OpenSSH do not like them and ssh-keygen -HF
aborts with an error when it sees such keys:
line 5 invalid key: example.net...
/root/ansible_testing/known_hosts is not a valid known_hosts file.
* Fix Python 3 errors
Specifically, the default mode of tempfile.NamedTemporaryFile is 'w+b',
which means Python 3 wants us to write bytes objects to it -- but the
keys we have are all unicode strings.
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example.com ssh-dss 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 root@freezer
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|1|d71/U7CbOH3Su+d2zxlbmiNfXtI=|g2YSPAVoK7bmg16FCOOPKTZe2BM= ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAq2A7hRGmdnm9tUDbO9IDSwBK6TbQa+PXYPCPy6rbTrTtw7PHkccKrpp0yVhp5HdEIcKr6pLlVDBfOLX9QUsyCOV0wzfjIJNlGEYsdlLJizHhbn2mUjvSAHQqZETYP81eFzLQNnPHt4EVVUh7VfDESU84KezmD5QlWpXLmvU31/yMf+Se8xhHTvKSCZIFImWwoG6mbUoWf9nzpIoaSjB+weqqUUmpaaasXVal72J+UX2B+2RPW3RcT0eOzQgqlJL3RKrTJvdsjE3JEAvGq3lGHSZXy28G3skua2SmVi/w4yCE6gbODqnTWlg7+wC604ydGXA8VJiS5ap43JXiUFFAaQ==
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|1|L0TqxOhAVh6mLZ2lbHdTv3owun0=|vn0La5pbHNxin3XzQQdvaOulvVU= ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBCNLCAA/SjVF3jkmlAlkgh+GtZdgxtusHaK66fcA7XSgCpQOdri1dGmND6pQDGwsxiKMy4Ou1GB2DR4N0G9T5E8=
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|1|WPo7yAOdlQKLSuRatNJCmDoga0k=|D/QybGglKokWuEQUe9Okpy5uSh0= ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBCNLCAA/SjVF3jkmlAlkgh+GtZdgxtusHaK66fcA7XSgCpQOdri1dGmND6pQDGwsxiKMy4Ou1GB2DR4N0G9T5E8=
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# example.net ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIM6OSqweGdPdQ/metQaf738AdN3P+itYp1AypOTgXkyj root@localhost
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