282 строки
9.4 KiB
Python
282 строки
9.4 KiB
Python
# Copyright (c) Microsoft Corporation
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#
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# All rights reserved.
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#
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# MIT License
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the "Software"),
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# to deal in the Software without restriction, including without limitation
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# the rights to use, copy, modify, merge, publish, distribute, sublicense,
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# and/or sell copies of the Software, and to permit persons to whom the
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# Software is furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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# DEALINGS IN THE SOFTWARE.
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# compat imports
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from __future__ import (
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absolute_import, division, print_function, unicode_literals
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)
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from builtins import ( # noqa
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bytes, dict, int, list, object, range, str, ascii, chr, hex, input,
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next, oct, open, pow, round, super, filter, map, zip)
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# stdlib imports
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import base64
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import getpass
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import logging
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import os
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try:
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import pathlib2 as pathlib
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except ImportError:
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import pathlib
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import tempfile
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import subprocess
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# local imports
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from . import util
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# create logger
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logger = logging.getLogger(__name__)
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util.setup_logger(logger)
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# global defines
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_SSH_KEY_PREFIX = 'id_rsa_shipyard'
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def get_ssh_key_prefix():
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# type: (None) -> str
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"""Get SSH key prefix
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:rtype: str
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:return: ssh key prefix
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"""
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return _SSH_KEY_PREFIX
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def generate_ssh_keypair(export_path):
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# type: (str) -> tuple
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"""Generate an ssh keypair for use with user logins
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:param str export_path: keypair export path
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:rtype: tuple
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:return: (private key filename, public key filename)
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"""
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privkey = str(pathlib.Path(export_path, _SSH_KEY_PREFIX))
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pubkey = str(pathlib.Path(export_path, _SSH_KEY_PREFIX + '.pub'))
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try:
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if os.path.exists(privkey):
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old = privkey + '.old'
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if os.path.exists(old):
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os.unlink(old)
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os.rename(privkey, old)
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except OSError:
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pass
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try:
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if os.path.exists(pubkey):
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old = pubkey + '.old'
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if os.path.exists(old):
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os.unlink(old)
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os.rename(pubkey, old)
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except OSError:
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pass
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logger.info('generating ssh key pair to path: {}'.format(export_path))
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subprocess.check_call(
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['ssh-keygen', '-f', privkey, '-t', 'rsa', '-N', ''''''])
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return (privkey, pubkey)
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def derive_pem_from_pfx(pfxfile, passphrase=None, pemfile=None):
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# type: (str, str, str) -> str
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"""Derive a private key pem file from a pfx
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:param str pfxfile: pfx file
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:param str passphrase: passphrase for pfx
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:param str pemfile: path of pem file to write to
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:rtype: str
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:return: path of pem file
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"""
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if pfxfile is None:
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raise ValueError('pfx file is invalid')
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if passphrase is None:
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passphrase = getpass.getpass('Enter password for PFX: ')
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# convert pfx to pem
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if pemfile is None:
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f = tempfile.NamedTemporaryFile(mode='wb', delete=False)
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f.close()
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pemfile = f.name
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try:
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subprocess.check_call(
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['openssl', 'pkcs12', '-nodes', '-in', pfxfile, '-out',
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pemfile, '-password', 'pass:' + passphrase]
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)
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except Exception:
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os.unlink(pemfile)
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pemfile = None
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return pemfile
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def get_sha1_thumbprint_pfx(pfxfile, passphrase):
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# type: (str, str) -> str
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"""Get SHA1 thumbprint of PFX
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:param str pfxfile: name of the pfx file to export
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:param str passphrase: passphrase for pfx
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:rtype: str
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:return: sha1 thumbprint of pfx
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"""
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if pfxfile is None:
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raise ValueError('pfxfile is invalid')
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if passphrase is None:
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passphrase = getpass.getpass('Enter password for PFX: ')
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# compute sha1 thumbprint of pfx
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pfxdump = subprocess.check_output(
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['openssl', 'pkcs12', '-in', pfxfile, '-nodes', '-passin',
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'pass:' + passphrase]
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)
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proc = subprocess.Popen(
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['openssl', 'x509', '-noout', '-fingerprint'], stdin=subprocess.PIPE,
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stdout=subprocess.PIPE
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)
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sha1_cert_tp = proc.communicate(input=pfxdump)[0]
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# return just thumbprint (without colons) from the above openssl command
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# in lowercase. Expected openssl output is in the form:
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# SHA1 Fingerprint=<thumbprint>
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return ''.join(util.decode_string(
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sha1_cert_tp).strip().split('=')[1].split(':')).lower()
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def generate_pem_pfx_certificates(config):
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# type: (dict) -> str
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"""Generate a pem and a derived pfx file
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:param dict config: configuration dict
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:rtype: str
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:return: sha1 thumbprint of pfx
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"""
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# gather input
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try:
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pemfile = config['batch_shipyard']['encryption']['public_key_pem']
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except KeyError:
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pemfile = None
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try:
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pfxfile = config['batch_shipyard']['encryption']['pfx']['filename']
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except KeyError:
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pfxfile = None
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try:
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passphrase = config['batch_shipyard']['encryption']['pfx'][
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'passphrase']
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except KeyError:
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passphrase = None
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if pemfile is None:
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pemfile = util.get_input('Enter public key PEM filename to create: ')
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if pfxfile is None:
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pfxfile = util.get_input('Enter PFX filename to create: ')
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if passphrase is None:
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while passphrase is None or len(passphrase) == 0:
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passphrase = getpass.getpass('Enter password for PFX: ')
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if len(passphrase) == 0:
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print('passphrase cannot be empty')
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privatekey = pemfile + '.key'
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# generate pem file with private key and no password
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f = tempfile.NamedTemporaryFile(mode='wb', delete=False)
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f.close()
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try:
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subprocess.check_call(
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['openssl', 'req', '-new', '-nodes', '-x509', '-newkey',
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'rsa:2048', '-keyout', privatekey, '-out', f.name, '-days', '730',
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'-subj', '/C=US/ST=None/L=None/O=None/CN=BatchShipyard']
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)
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# extract public key from private key
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subprocess.check_call(
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['openssl', 'rsa', '-in', privatekey, '-pubout', '-outform',
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'PEM', '-out', pemfile]
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)
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logger.debug('created public key PEM file: {}'.format(pemfile))
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# convert pem to pfx for Azure Batch service
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subprocess.check_call(
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['openssl', 'pkcs12', '-export', '-out', pfxfile, '-inkey',
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privatekey, '-in', f.name, '-certfile', f.name,
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'-passin', 'pass:', '-passout', 'pass:' + passphrase]
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)
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logger.debug('created PFX file: {}'.format(pfxfile))
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finally:
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# remove rsa private key file
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try:
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os.unlink(privatekey)
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except OSError:
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pass
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# remove temp cert pem
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os.unlink(f.name)
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# get sha1 thumbprint of pfx
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return get_sha1_thumbprint_pfx(pfxfile, passphrase)
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def _rsa_encrypt_string(data, config):
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# type: (str, dict) -> str
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"""RSA encrypt a string
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:param str data: clear text data to encrypt
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:param dict config: configuration dict
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:rtype: str
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:return: base64-encoded cipher text
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"""
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if data is None or len(data) == 0:
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raise ValueError('invalid data to encrypt')
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try:
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inkey = config['batch_shipyard']['encryption']['public_key_pem']
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except KeyError:
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pass
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proc = subprocess.Popen(
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['openssl', 'rsautl', '-encrypt', '-pubin', '-inkey', inkey],
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stdin=subprocess.PIPE, stdout=subprocess.PIPE)
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ciphertext = util.base64_encode_string(
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proc.communicate(input=util.encode_string(data))[0])
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return ciphertext
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def _rsa_decrypt_string_with_pfx(ciphertext, config):
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# type: (str, dict) -> str
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"""RSA decrypt a string
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:param str ciphertext: cipher text in base64
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:param dict config: configuration dict
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:rtype: str
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:return: decrypted cipher text
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"""
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if ciphertext is None or len(ciphertext) == 0:
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raise ValueError('invalid ciphertext to decrypt')
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pfxfile = config['batch_shipyard']['encryption']['pfx']['filename']
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try:
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pfx_passphrase = config['batch_shipyard']['encryption']['pfx'][
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'passphrase']
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except KeyError:
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pfx_passphrase = None
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pemfile = derive_pem_from_pfx(pfxfile, pfx_passphrase, None)
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if pemfile is None:
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raise RuntimeError('cannot decrypt without valid private key')
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cleartext = None
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try:
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data = base64.b64decode(ciphertext)
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proc = subprocess.Popen(
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['openssl', 'rsautl', '-decrypt', '-inkey', pemfile],
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stdin=subprocess.PIPE, stdout=subprocess.PIPE)
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cleartext = proc.communicate(input=data)[0]
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finally:
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os.unlink(pemfile)
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return cleartext
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def encrypt_string(enabled, string, config):
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# type: (bool, str, dict) -> str
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"""Encrypt a string
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:param bool enabled: if encryption is enabled
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:param str string: string to encrypt
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:param dict config: configuration dict
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:rtype: str
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:return: encrypted string if enabled
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"""
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if enabled:
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return _rsa_encrypt_string(string, config)
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else:
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return string
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