mirror of
https://github.com/thegeeklab/ansible-later.git
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468 lines
21 KiB
Python
468 lines
21 KiB
Python
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# (c) 2014, James Tanner <tanner.jc@gmail.com>
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#
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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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#
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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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#
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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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# ansible-vault is a script that encrypts/decrypts YAML files. See
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# https://docs.ansible.com/playbooks_vault.html for more details.
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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import os
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import sys
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from ansible.cli import CLI
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from ansible import constants as C
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from ansible.errors import AnsibleOptionsError
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from ansible.module_utils._text import to_text, to_bytes
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from ansible.parsing.dataloader import DataLoader
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from ansible.parsing.vault import VaultEditor, VaultLib, match_encrypt_secret
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try:
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from __main__ import display
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except ImportError:
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from ansible.utils.display import Display
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display = Display()
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class VaultCLI(CLI):
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''' can encrypt any structured data file used by Ansible.
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This can include *group_vars/* or *host_vars/* inventory variables,
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variables loaded by *include_vars* or *vars_files*, or variable files
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passed on the ansible-playbook command line with *-e @file.yml* or *-e @file.json*.
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Role variables and defaults are also included!
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Because Ansible tasks, handlers, and other objects are data, these can also be encrypted with vault.
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If you'd like to not expose what variables you are using, you can keep an individual task file entirely encrypted.
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The password used with vault currently must be the same for all files you wish to use together at the same time.
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'''
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VALID_ACTIONS = ("create", "decrypt", "edit", "encrypt", "encrypt_string", "rekey", "view")
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FROM_STDIN = "stdin"
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FROM_ARGS = "the command line args"
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FROM_PROMPT = "the interactive prompt"
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def __init__(self, args):
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self.b_vault_pass = None
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self.b_new_vault_pass = None
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self.encrypt_string_read_stdin = False
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self.encrypt_secret = None
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self.encrypt_vault_id = None
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self.new_encrypt_secret = None
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self.new_encrypt_vault_id = None
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self.can_output = ['encrypt', 'decrypt', 'encrypt_string']
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super(VaultCLI, self).__init__(args)
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def set_action(self):
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super(VaultCLI, self).set_action()
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# add output if needed
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if self.action in self.can_output:
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self.parser.add_option('--output', default=None, dest='output_file',
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help='output file name for encrypt or decrypt; use - for stdout',
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action="callback", callback=CLI.unfrack_path, type='string')
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# options specific to self.actions
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if self.action == "create":
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self.parser.set_usage("usage: %prog create [options] file_name")
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elif self.action == "decrypt":
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self.parser.set_usage("usage: %prog decrypt [options] file_name")
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elif self.action == "edit":
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self.parser.set_usage("usage: %prog edit [options] file_name")
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elif self.action == "view":
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self.parser.set_usage("usage: %prog view [options] file_name")
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elif self.action == "encrypt":
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self.parser.set_usage("usage: %prog encrypt [options] file_name")
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# I have no prefence for either dash or underscore
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elif self.action == "encrypt_string":
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self.parser.add_option('-p', '--prompt', dest='encrypt_string_prompt',
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action='store_true',
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help="Prompt for the string to encrypt")
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self.parser.add_option('-n', '--name', dest='encrypt_string_names',
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action='append',
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help="Specify the variable name")
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self.parser.add_option('--stdin-name', dest='encrypt_string_stdin_name',
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default=None,
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help="Specify the variable name for stdin")
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self.parser.set_usage("usage: %prog encrypt_string [--prompt] [options] string_to_encrypt")
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elif self.action == "rekey":
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self.parser.set_usage("usage: %prog rekey [options] file_name")
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# For encrypting actions, we can also specify which of multiple vault ids should be used for encrypting
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if self.action in ['create', 'encrypt', 'encrypt_string', 'rekey', 'edit']:
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self.parser.add_option('--encrypt-vault-id', default=[], dest='encrypt_vault_id',
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action='store', type='string',
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help='the vault id used to encrypt (required if more than vault-id is provided)')
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def parse(self):
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self.parser = CLI.base_parser(
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vault_opts=True,
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vault_rekey_opts=True,
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usage="usage: %%prog [%s] [options] [vaultfile.yml]" % "|".join(self.VALID_ACTIONS),
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desc="encryption/decryption utility for Ansible data files",
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epilog="\nSee '%s <command> --help' for more information on a specific command.\n\n" % os.path.basename(sys.argv[0])
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)
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self.set_action()
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super(VaultCLI, self).parse()
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self.validate_conflicts(vault_opts=True, vault_rekey_opts=True)
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display.verbosity = self.options.verbosity
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if self.options.vault_ids:
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for vault_id in self.options.vault_ids:
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if u';' in vault_id:
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raise AnsibleOptionsError("'%s' is not a valid vault id. The character ';' is not allowed in vault ids" % vault_id)
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if self.action not in self.can_output:
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if len(self.args) == 0:
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raise AnsibleOptionsError("Vault requires at least one filename as a parameter")
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else:
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# This restriction should remain in place until it's possible to
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# load multiple YAML records from a single file, or it's too easy
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# to create an encrypted file that can't be read back in. But in
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# the meanwhile, "cat a b c|ansible-vault encrypt --output x" is
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# a workaround.
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if self.options.output_file and len(self.args) > 1:
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raise AnsibleOptionsError("At most one input file may be used with the --output option")
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if self.action == 'encrypt_string':
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if '-' in self.args or len(self.args) == 0 or self.options.encrypt_string_stdin_name:
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self.encrypt_string_read_stdin = True
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# TODO: prompting from stdin and reading from stdin seem mutually exclusive, but verify that.
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if self.options.encrypt_string_prompt and self.encrypt_string_read_stdin:
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raise AnsibleOptionsError('The --prompt option is not supported if also reading input from stdin')
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def run(self):
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super(VaultCLI, self).run()
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loader = DataLoader()
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# set default restrictive umask
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old_umask = os.umask(0o077)
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vault_ids = self.options.vault_ids
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# there are 3 types of actions, those that just 'read' (decrypt, view) and only
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# need to ask for a password once, and those that 'write' (create, encrypt) that
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# ask for a new password and confirm it, and 'read/write (rekey) that asks for the
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# old password, then asks for a new one and confirms it.
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default_vault_ids = C.DEFAULT_VAULT_IDENTITY_LIST
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vault_ids = default_vault_ids + vault_ids
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# TODO: instead of prompting for these before, we could let VaultEditor
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# call a callback when it needs it.
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if self.action in ['decrypt', 'view', 'rekey', 'edit']:
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vault_secrets = self.setup_vault_secrets(loader,
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vault_ids=vault_ids,
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vault_password_files=self.options.vault_password_files,
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ask_vault_pass=self.options.ask_vault_pass)
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if not vault_secrets:
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raise AnsibleOptionsError("A vault password is required to use Ansible's Vault")
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if self.action in ['encrypt', 'encrypt_string', 'create']:
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encrypt_vault_id = None
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# no --encrypt-vault-id self.options.encrypt_vault_id for 'edit'
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if self.action not in ['edit']:
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encrypt_vault_id = self.options.encrypt_vault_id or C.DEFAULT_VAULT_ENCRYPT_IDENTITY
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vault_secrets = None
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vault_secrets = \
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self.setup_vault_secrets(loader,
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vault_ids=vault_ids,
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vault_password_files=self.options.vault_password_files,
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ask_vault_pass=self.options.ask_vault_pass,
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create_new_password=True)
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if len(vault_secrets) > 1 and not encrypt_vault_id:
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raise AnsibleOptionsError("The vault-ids %s are available to encrypt. Specify the vault-id to encrypt with --encrypt-vault-id" %
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','.join([x[0] for x in vault_secrets]))
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if not vault_secrets:
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raise AnsibleOptionsError("A vault password is required to use Ansible's Vault")
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encrypt_secret = match_encrypt_secret(vault_secrets,
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encrypt_vault_id=encrypt_vault_id)
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# only one secret for encrypt for now, use the first vault_id and use its first secret
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# TODO: exception if more than one?
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self.encrypt_vault_id = encrypt_secret[0]
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self.encrypt_secret = encrypt_secret[1]
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if self.action in ['rekey']:
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encrypt_vault_id = self.options.encrypt_vault_id or C.DEFAULT_VAULT_ENCRYPT_IDENTITY
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# print('encrypt_vault_id: %s' % encrypt_vault_id)
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# print('default_encrypt_vault_id: %s' % default_encrypt_vault_id)
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# new_vault_ids should only ever be one item, from
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# load the default vault ids if we are using encrypt-vault-id
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new_vault_ids = []
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if encrypt_vault_id:
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new_vault_ids = default_vault_ids
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if self.options.new_vault_id:
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new_vault_ids.append(self.options.new_vault_id)
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new_vault_password_files = []
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if self.options.new_vault_password_file:
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new_vault_password_files.append(self.options.new_vault_password_file)
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new_vault_secrets = \
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self.setup_vault_secrets(loader,
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vault_ids=new_vault_ids,
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vault_password_files=new_vault_password_files,
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ask_vault_pass=self.options.ask_vault_pass,
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create_new_password=True)
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if not new_vault_secrets:
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raise AnsibleOptionsError("A new vault password is required to use Ansible's Vault rekey")
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# There is only one new_vault_id currently and one new_vault_secret, or we
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# use the id specified in --encrypt-vault-id
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new_encrypt_secret = match_encrypt_secret(new_vault_secrets,
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encrypt_vault_id=encrypt_vault_id)
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self.new_encrypt_vault_id = new_encrypt_secret[0]
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self.new_encrypt_secret = new_encrypt_secret[1]
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loader.set_vault_secrets(vault_secrets)
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# FIXME: do we need to create VaultEditor here? its not reused
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vault = VaultLib(vault_secrets)
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self.editor = VaultEditor(vault)
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self.execute()
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# and restore umask
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os.umask(old_umask)
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def execute_encrypt(self):
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''' encrypt the supplied file using the provided vault secret '''
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if len(self.args) == 0 and sys.stdin.isatty():
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display.display("Reading plaintext input from stdin", stderr=True)
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for f in self.args or ['-']:
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# Fixme: use the correct vau
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self.editor.encrypt_file(f, self.encrypt_secret,
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vault_id=self.encrypt_vault_id,
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output_file=self.options.output_file)
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if sys.stdout.isatty():
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display.display("Encryption successful", stderr=True)
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def format_ciphertext_yaml(self, b_ciphertext, indent=None, name=None):
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indent = indent or 10
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block_format_var_name = ""
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if name:
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block_format_var_name = "%s: " % name
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block_format_header = "%s!vault |" % block_format_var_name
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lines = []
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vault_ciphertext = to_text(b_ciphertext)
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lines.append(block_format_header)
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for line in vault_ciphertext.splitlines():
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lines.append('%s%s' % (' ' * indent, line))
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yaml_ciphertext = '\n'.join(lines)
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return yaml_ciphertext
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def execute_encrypt_string(self):
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''' encrypt the supplied string using the provided vault secret '''
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b_plaintext = None
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# Holds tuples (the_text, the_source_of_the_string, the variable name if its provided).
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b_plaintext_list = []
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# remove the non-option '-' arg (used to indicate 'read from stdin') from the candidate args so
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# we don't add it to the plaintext list
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args = [x for x in self.args if x != '-']
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# We can prompt and read input, or read from stdin, but not both.
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if self.options.encrypt_string_prompt:
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msg = "String to encrypt: "
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name = None
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name_prompt_response = display.prompt('Variable name (enter for no name): ')
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# TODO: enforce var naming rules?
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if name_prompt_response != "":
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name = name_prompt_response
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# TODO: could prompt for which vault_id to use for each plaintext string
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# currently, it will just be the default
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# could use private=True for shadowed input if useful
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prompt_response = display.prompt(msg)
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if prompt_response == '':
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raise AnsibleOptionsError('The plaintext provided from the prompt was empty, not encrypting')
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b_plaintext = to_bytes(prompt_response)
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b_plaintext_list.append((b_plaintext, self.FROM_PROMPT, name))
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# read from stdin
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if self.encrypt_string_read_stdin:
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if sys.stdout.isatty():
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display.display("Reading plaintext input from stdin. (ctrl-d to end input)", stderr=True)
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stdin_text = sys.stdin.read()
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if stdin_text == '':
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raise AnsibleOptionsError('stdin was empty, not encrypting')
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||
|
|
b_plaintext = to_bytes(stdin_text)
|
||
|
|
|
||
|
|
# defaults to None
|
||
|
|
name = self.options.encrypt_string_stdin_name
|
||
|
|
b_plaintext_list.append((b_plaintext, self.FROM_STDIN, name))
|
||
|
|
|
||
|
|
# use any leftover args as strings to encrypt
|
||
|
|
# Try to match args up to --name options
|
||
|
|
if hasattr(self.options, 'encrypt_string_names') and self.options.encrypt_string_names:
|
||
|
|
name_and_text_list = list(zip(self.options.encrypt_string_names, args))
|
||
|
|
|
||
|
|
# Some but not enough --name's to name each var
|
||
|
|
if len(args) > len(name_and_text_list):
|
||
|
|
# Trying to avoid ever showing the plaintext in the output, so this warning is vague to avoid that.
|
||
|
|
display.display('The number of --name options do not match the number of args.',
|
||
|
|
stderr=True)
|
||
|
|
display.display('The last named variable will be "%s". The rest will not have names.' % self.options.encrypt_string_names[-1],
|
||
|
|
stderr=True)
|
||
|
|
|
||
|
|
# Add the rest of the args without specifying a name
|
||
|
|
for extra_arg in args[len(name_and_text_list):]:
|
||
|
|
name_and_text_list.append((None, extra_arg))
|
||
|
|
|
||
|
|
# if no --names are provided, just use the args without a name.
|
||
|
|
else:
|
||
|
|
name_and_text_list = [(None, x) for x in args]
|
||
|
|
|
||
|
|
# Convert the plaintext text objects to bytestrings and collect
|
||
|
|
for name_and_text in name_and_text_list:
|
||
|
|
name, plaintext = name_and_text
|
||
|
|
|
||
|
|
if plaintext == '':
|
||
|
|
raise AnsibleOptionsError('The plaintext provided from the command line args was empty, not encrypting')
|
||
|
|
|
||
|
|
b_plaintext = to_bytes(plaintext)
|
||
|
|
b_plaintext_list.append((b_plaintext, self.FROM_ARGS, name))
|
||
|
|
|
||
|
|
# TODO: specify vault_id per string?
|
||
|
|
# Format the encrypted strings and any corresponding stderr output
|
||
|
|
outputs = self._format_output_vault_strings(b_plaintext_list, vault_id=self.encrypt_vault_id)
|
||
|
|
|
||
|
|
for output in outputs:
|
||
|
|
err = output.get('err', None)
|
||
|
|
out = output.get('out', '')
|
||
|
|
if err:
|
||
|
|
sys.stderr.write(err)
|
||
|
|
print(out)
|
||
|
|
|
||
|
|
if sys.stdout.isatty():
|
||
|
|
display.display("Encryption successful", stderr=True)
|
||
|
|
|
||
|
|
# TODO: offer block or string ala eyaml
|
||
|
|
|
||
|
|
def _format_output_vault_strings(self, b_plaintext_list, vault_id=None):
|
||
|
|
# If we are only showing one item in the output, we don't need to included commented
|
||
|
|
# delimiters in the text
|
||
|
|
show_delimiter = False
|
||
|
|
if len(b_plaintext_list) > 1:
|
||
|
|
show_delimiter = True
|
||
|
|
|
||
|
|
# list of dicts {'out': '', 'err': ''}
|
||
|
|
output = []
|
||
|
|
|
||
|
|
# Encrypt the plaintext, and format it into a yaml block that can be pasted into a playbook.
|
||
|
|
# For more than one input, show some differentiating info in the stderr output so we can tell them
|
||
|
|
# apart. If we have a var name, we include that in the yaml
|
||
|
|
for index, b_plaintext_info in enumerate(b_plaintext_list):
|
||
|
|
# (the text itself, which input it came from, its name)
|
||
|
|
b_plaintext, src, name = b_plaintext_info
|
||
|
|
|
||
|
|
b_ciphertext = self.editor.encrypt_bytes(b_plaintext, self.encrypt_secret,
|
||
|
|
vault_id=vault_id)
|
||
|
|
|
||
|
|
# block formatting
|
||
|
|
yaml_text = self.format_ciphertext_yaml(b_ciphertext, name=name)
|
||
|
|
|
||
|
|
err_msg = None
|
||
|
|
if show_delimiter:
|
||
|
|
human_index = index + 1
|
||
|
|
if name:
|
||
|
|
err_msg = '# The encrypted version of variable ("%s", the string #%d from %s).\n' % (name, human_index, src)
|
||
|
|
else:
|
||
|
|
err_msg = '# The encrypted version of the string #%d from %s.)\n' % (human_index, src)
|
||
|
|
output.append({'out': yaml_text, 'err': err_msg})
|
||
|
|
|
||
|
|
return output
|
||
|
|
|
||
|
|
def execute_decrypt(self):
|
||
|
|
''' decrypt the supplied file using the provided vault secret '''
|
||
|
|
|
||
|
|
if len(self.args) == 0 and sys.stdin.isatty():
|
||
|
|
display.display("Reading ciphertext input from stdin", stderr=True)
|
||
|
|
|
||
|
|
for f in self.args or ['-']:
|
||
|
|
self.editor.decrypt_file(f, output_file=self.options.output_file)
|
||
|
|
|
||
|
|
if sys.stdout.isatty():
|
||
|
|
display.display("Decryption successful", stderr=True)
|
||
|
|
|
||
|
|
def execute_create(self):
|
||
|
|
''' create and open a file in an editor that will be encryped with the provided vault secret when closed'''
|
||
|
|
|
||
|
|
if len(self.args) > 1:
|
||
|
|
raise AnsibleOptionsError("ansible-vault create can take only one filename argument")
|
||
|
|
|
||
|
|
self.editor.create_file(self.args[0], self.encrypt_secret,
|
||
|
|
vault_id=self.encrypt_vault_id)
|
||
|
|
|
||
|
|
def execute_edit(self):
|
||
|
|
''' open and decrypt an existing vaulted file in an editor, that will be encryped again when closed'''
|
||
|
|
for f in self.args:
|
||
|
|
self.editor.edit_file(f)
|
||
|
|
|
||
|
|
def execute_view(self):
|
||
|
|
''' open, decrypt and view an existing vaulted file using a pager using the supplied vault secret '''
|
||
|
|
|
||
|
|
for f in self.args:
|
||
|
|
# Note: vault should return byte strings because it could encrypt
|
||
|
|
# and decrypt binary files. We are responsible for changing it to
|
||
|
|
# unicode here because we are displaying it and therefore can make
|
||
|
|
# the decision that the display doesn't have to be precisely what
|
||
|
|
# the input was (leave that to decrypt instead)
|
||
|
|
plaintext = self.editor.plaintext(f)
|
||
|
|
self.pager(to_text(plaintext))
|
||
|
|
|
||
|
|
def execute_rekey(self):
|
||
|
|
''' re-encrypt a vaulted file with a new secret, the previous secret is required '''
|
||
|
|
for f in self.args:
|
||
|
|
# FIXME: plumb in vault_id, use the default new_vault_secret for now
|
||
|
|
self.editor.rekey_file(f, self.new_encrypt_secret,
|
||
|
|
self.new_encrypt_vault_id)
|
||
|
|
|
||
|
|
display.display("Rekey successful", stderr=True)
|