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Diffstat (limited to 'src/ssh_audit/algorithm.py')
-rw-r--r-- | src/ssh_audit/algorithm.py | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/src/ssh_audit/algorithm.py b/src/ssh_audit/algorithm.py new file mode 100644 index 0000000..e213264 --- /dev/null +++ b/src/ssh_audit/algorithm.py @@ -0,0 +1,61 @@ +""" + The MIT License (MIT) + + Copyright (C) 2017 Andris Raugulis (moo@arthepsy.eu) + + Permission is hereby granted, free of charge, to any person obtaining a copy + of this software and associated documentation files (the "Software"), to deal + in the Software without restriction, including without limitation the rights + to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + copies of the Software, and to permit persons to whom the Software is + furnished to do so, subject to the following conditions: + + The above copyright notice and this permission notice shall be included in + all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + THE SOFTWARE. +""" +# pylint: disable=unused-import +from typing import Dict, List, Set, Sequence, Tuple, Iterable # noqa: F401 +from typing import Callable, Optional, Union, Any # noqa: F401 + +from ssh_audit.product import Product + + +class Algorithm: + + @staticmethod + def get_ssh_version(version_desc: str) -> Tuple[str, str, bool]: + is_client = version_desc.endswith('C') + if is_client: + version_desc = version_desc[:-1] + if version_desc.startswith('d'): + return Product.DropbearSSH, version_desc[1:], is_client + elif version_desc.startswith('l1'): + return Product.LibSSH, version_desc[2:], is_client + else: + return Product.OpenSSH, version_desc, is_client + + @classmethod + def get_since_text(cls, versions: List[Optional[str]]) -> Optional[str]: + tv = [] + if len(versions) == 0 or versions[0] is None: + return None + for v in versions[0].split(','): + ssh_prod, ssh_ver, is_cli = cls.get_ssh_version(v) + if not ssh_ver: + continue + if ssh_prod in [Product.LibSSH]: + continue + if is_cli: + ssh_ver = '{} (client only)'.format(ssh_ver) + tv.append('{} {}'.format(ssh_prod, ssh_ver)) + if len(tv) == 0: + return None + return 'available since ' + ', '.join(tv).rstrip(', ') |