136 lines
3.6 KiB
Python
Executable file
136 lines
3.6 KiB
Python
Executable file
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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Ansible module to add authorized_keys for ssh logins.
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(c) 2012, Brad Olson <brado@movedbylight.com>
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This file is part of Ansible
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Ansible is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Ansible is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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"""
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# Makes sure the public key line is present or absent in the user's .ssh/authorized_keys.
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#
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# Arguments
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# =========
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# user = username
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# key = line to add to authorized_keys for user
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# state = absent|present (default: present)
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#
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# see example in examples/playbooks
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import sys
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import os
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import pwd
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import os.path
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def keyfile(user, write=False):
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"""
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Calculate name of authorized keys file, optionally creating the
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directories and file, properly setting permissions.
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:param str user: name of user in passwd file
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:param bool write: if True, write changes to authorized_keys file (creating directories if needed)
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:return: full path string to authorized_keys for user
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"""
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user_entry = pwd.getpwnam(user)
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homedir = user_entry.pw_dir
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sshdir = os.path.join(homedir, ".ssh")
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keysfile = os.path.join(sshdir, "authorized_keys")
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if not write:
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return keysfile
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uid = user_entry.pw_uid
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gid = user_entry.pw_gid
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if not os.path.exists(sshdir):
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os.mkdir(sshdir, 0700)
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os.chown(sshdir, uid, gid)
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os.chmod(sshdir, 0700)
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if not os.path.exists( keysfile):
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try:
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f = open(keysfile, "w") #touches file so we can set ownership and perms
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finally:
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f.close()
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os.chown(keysfile, uid, gid)
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os.chmod(keysfile, 0600)
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return keysfile
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def readkeys(filename):
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if not os.path.isfile(filename):
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return []
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f = open(filename)
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keys = [line.rstrip() for line in f.readlines()]
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f.close()
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return keys
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def writekeys( filename, keys):
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f = open(filename,"w")
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f.writelines( (key + "\n" for key in keys) )
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f.close()
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def enforce_state(module, params):
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"""
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Add or remove key.
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"""
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user = params["user"]
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key = params["key"]
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state = params.get("state", "present")
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# check current state -- just get the filename, don't create file
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params["keyfile"] = keyfile(user, write=False)
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keys = readkeys(params["keyfile"])
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present = key in keys
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# handle idempotent state=present
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if state=="present":
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if present:
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module.exit_json(changed=False)
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keys.append(key)
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writekeys(keyfile(user,write=True), keys)
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elif state=="absent":
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if not present:
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module.exit_json(changed=False)
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keys.remove(key)
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writekeys(keyfile(user,write=True), keys)
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params['changed'] = True
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return params
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def main():
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module = AnsibleModule(
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argument_spec = dict(
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user = dict(required=True),
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key = dict(required=True),
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state = dict(default='present', choices=['absent','present'])
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)
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)
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params = module.params
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results = enforce_state(module, module.params)
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module.exit_json(**results)
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# this is magic, see lib/ansible/module_common.py
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#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
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main()
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