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""" CfgEncryptedGenerator lets you encrypt your plaintext
:ref:`server-plugins-generators-cfg` files on the server. """
import logging
import Bcfg2.Server.Plugin
from Bcfg2.Server.Plugins.Cfg import CfgGenerator, SETUP
try:
from Bcfg2.Encryption import bruteforce_decrypt, EVPError
have_crypto = True
except ImportError:
have_crypto = False
logger = logging.getLogger(__name__)
class CfgEncryptedGenerator(CfgGenerator):
""" CfgEncryptedGenerator lets you encrypt your plaintext
:ref:`server-plugins-generators-cfg` files on the server. """
#: Handle .crypt files
__extensions__ = ["crypt"]
def __init__(self, fname, spec, encoding):
CfgGenerator.__init__(self, fname, spec, encoding)
if not have_crypto:
msg = "Cfg: M2Crypto is not available: %s" % entry.get("name")
logger.error(msg)
raise Bcfg2.Server.Plugin.PluginExecutionError(msg)
__init__.__doc__ = CfgGenerator.__init__.__doc__
def handle_event(self, event):
if event.code2str() == 'deleted':
return
try:
crypted = open(self.name).read()
except UnicodeDecodeError:
crypted = open(self.name, mode='rb').read()
except:
logger.error("Failed to read %s" % self.name)
return
# todo: let the user specify a passphrase by name
try:
self.data = bruteforce_decrypt(crypted, setup=SETUP)
except EVPError:
msg = "Failed to decrypt %s" % self.name
logger.error(msg)
raise Bcfg2.Server.Plugin.PluginExecutionError(msg)
handle_event.__doc__ = CfgGenerator.handle_event.__doc__
def get_data(self, entry, metadata):
if self.data is None:
raise Bcfg2.Server.Plugin.PluginExecutionError("Failed to decrypt %s" % self.name)
return CfgGenerator.get_data(self, entry, metadata)
get_data.__doc__ = CfgGenerator.get_data.__doc__
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