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# -*- coding: utf-8 -*- |
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# |
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# This file is part of Glances. |
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# |
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# Copyright (C) 2015 Nicolargo <[email protected]> |
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# |
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# Glances is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU Lesser 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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# |
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# Glances 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 Lesser General Public License for more details. |
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# |
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# You should have received a copy of the GNU Lesser General Public License |
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# along with this program. If not, see <http://www.gnu.org/licenses/>. |
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"""Manage password.""" |
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import getpass |
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import hashlib |
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import os |
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import sys |
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import uuid |
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from io import open |
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from glances.compat import b, input |
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from glances.globals import appname, BSD, LINUX, OSX, WINDOWS |
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from glances.logger import logger |
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class GlancesPassword(object): |
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"""This class contains all the methods relating to password.""" |
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def __init__(self, username='glances'): |
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self.username = username |
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self.password_path = self.get_password_path() |
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self.password_filename = self.username + '.pwd' |
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self.password_filepath = os.path.join(self.password_path, self.password_filename) |
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def get_password_path(self): |
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r"""Get the path where the password file will be stored. |
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* Linux and BSD: ~/.config/glances |
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* OS X: ~/Library/glances |
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* Windows: %APPDATA%\glances |
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""" |
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if LINUX or BSD: |
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app_path = os.environ.get('XDG_CONFIG_HOME') or os.path.expanduser('~/.config') |
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elif OSX: |
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app_path = os.path.join(os.environ.get('HOME'), 'Library') |
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elif WINDOWS: |
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app_path = os.environ.get('APPDATA') |
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else: |
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app_path = '.' |
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# Append the Glances folder |
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app_path = os.path.join(app_path, appname) |
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return app_path |
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def sha256_hash(self, plain_password): |
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"""Return the SHA-256 of the given password.""" |
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return hashlib.sha256(b(plain_password)).hexdigest() |
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def get_hash(self, salt, plain_password): |
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"""Return the hashed password, salt + SHA-256.""" |
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return hashlib.sha256(salt.encode() + plain_password.encode()).hexdigest() |
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def hash_password(self, plain_password): |
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"""Hash password with a salt based on UUID (universally unique identifier).""" |
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salt = uuid.uuid4().hex |
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encrypted_password = self.get_hash(salt, plain_password) |
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return salt + '$' + encrypted_password |
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def check_password(self, hashed_password, plain_password): |
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"""Encode the plain_password with the salt of the hashed_password. |
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Return the comparison with the encrypted_password. |
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""" |
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salt, encrypted_password = hashed_password.split('$') |
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re_encrypted_password = self.get_hash(salt, plain_password) |
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return encrypted_password == re_encrypted_password |
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def get_password(self, description='', confirm=False, clear=False): |
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"""Get the password from a Glances client or server. |
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For Glances server, get the password (confirm=True, clear=False): |
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1) from the password file (if it exists) |
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2) from the CLI |
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Optionally: save the password to a file (hashed with salt + SHA-256) |
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For Glances client, get the password (confirm=False, clear=True): |
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1) from the CLI |
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2) the password is hashed with SHA-256 (only SHA string transit |
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through the network) |
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""" |
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if os.path.exists(self.password_filepath) and not clear: |
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# If the password file exist then use it |
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logger.info("Read password from file {0}".format(self.password_filepath)) |
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password = self.load_password() |
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else: |
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# password_sha256 is the plain SHA-256 password |
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# password_hashed is the salt + SHA-256 password |
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password_sha256 = self.sha256_hash(getpass.getpass(description)) |
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password_hashed = self.hash_password(password_sha256) |
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if confirm: |
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# password_confirm is the clear password (only used to compare) |
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password_confirm = self.sha256_hash(getpass.getpass('Password (confirm): ')) |
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if not self.check_password(password_hashed, password_confirm): |
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logger.critical("Sorry, passwords do not match. Exit.") |
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sys.exit(1) |
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# Return the plain SHA-256 or the salted password |
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if clear: |
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password = password_sha256 |
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else: |
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password = password_hashed |
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# Save the hashed password to the password file |
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if not clear: |
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save_input = input('Do you want to save the password? [Yes/No]: ') |
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if len(save_input) > 0 and save_input[0].upper() == 'Y': |
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self.save_password(password_hashed) |
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return password |
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def save_password(self, hashed_password): |
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"""Save the hashed password to the Glances folder.""" |
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# Check if the Glances folder already exists |
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if not os.path.exists(self.password_path): |
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# Create the Glances folder |
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try: |
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os.makedirs(self.password_path) |
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except OSError as e: |
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logger.error("Cannot create Glances directory: {0}".format(e)) |
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return |
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# Create/overwrite the password file |
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with open(self.password_filepath, 'wb') as file_pwd: |
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file_pwd.write(b(hashed_password)) |
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def load_password(self): |
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"""Load the hashed password from the Glances folder.""" |
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# Read the password file, if it exists |
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with open(self.password_filepath, 'r') as file_pwd: |
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hashed_password = file_pwd.read() |
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return hashed_password |
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nicolargo /
glances
