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# Copyright (C) 2015 IPA Project Contributors, see COPYING for license
from __future__ import print_function, absolute_import
import os
import sys
from custodia.plugin import CSStore
from ipaplatform.paths import paths
from ipaplatform.constants import constants
from ipapython import ipautil
class UnknownKeyName(Exception):
pass
class DBMAPHandler:
dbtype = None
def __init__(self, config, dbmap, nickname):
dbtype = dbmap.get('type')
if dbtype is None or dbtype != self.dbtype:
raise ValueError(
"Invalid type '{}', expected '{}'".format(
dbtype, self.dbtype
)
)
self.config = config
self.dbmap = dbmap
self.nickname = nickname
def export_key(self):
raise NotImplementedError
def import_key(self, value):
raise NotImplementedError
class DBMAPCommandHandler(DBMAPHandler):
def __init__(self, config, dbmap, nickname):
super().__init__(config, dbmap, nickname)
self.runas = dbmap.get('runas')
self.command = os.path.join(
paths.IPA_CUSTODIA_HANDLER,
dbmap['command']
)
def run_handler(self, extra_args=(), stdin=None):
"""Run handler script to export / import key material
"""
args = [self.command]
args.extend(extra_args)
kwargs = dict(
runas=self.runas,
encoding='utf-8',
)
if stdin:
args.extend(['--import', '-'])
kwargs.update(stdin=stdin)
else:
args.extend(['--export', '-'])
kwargs.update(capture_output=True)
result = ipautil.run(args, **kwargs)
if stdin is None:
return result.output
else:
return None
def log_error(error):
print(error, file=sys.stderr)
class NSSWrappedCertDB(DBMAPCommandHandler):
"""
Store that extracts private keys from an NSSDB, wrapped with the
private key of the primary CA.
"""
dbtype = 'NSSDB'
def export_key(self):
return self.run_handler(['--nickname', self.nickname])
class NSSCertDB(DBMAPCommandHandler):
dbtype = 'NSSDB'
def export_key(self):
return self.run_handler(['--nickname', self.nickname])
def import_key(self, value):
return self.run_handler(
['--nickname', self.nickname],
stdin=value
)
# Exfiltrate the DM password Hash so it can be set in replica's and this
# way let a replica be install without knowing the DM password and yet
# still keep the DM password synchronized across replicas
class DMLDAP(DBMAPCommandHandler):
dbtype = 'DMLDAP'
def __init__(self, config, dbmap, nickname):
super().__init__(config, dbmap, nickname)
if nickname != 'DMHash':
raise UnknownKeyName("Unknown Key Named '%s'" % nickname)
def export_key(self):
return self.run_handler()
def import_key(self, value):
self.run_handler(stdin=value)
class PEMFileHandler(DBMAPCommandHandler):
dbtype = 'PEM'
def export_key(self):
return self.run_handler()
def import_key(self, value):
return self.run_handler(stdin=value)
NAME_DB_MAP = {
'ca': {
'type': 'NSSDB',
'handler': NSSCertDB,
'command': 'ipa-custodia-pki-tomcat',
'runas': constants.PKI_USER,
},
'ca_wrapped': {
'type': 'NSSDB',
'handler': NSSWrappedCertDB,
'command': 'ipa-custodia-pki-tomcat-wrapped',
'runas': constants.PKI_USER,
},
'ra': {
'type': 'PEM',
'handler': PEMFileHandler,
'command': 'ipa-custodia-ra-agent',
'runas': None, # import needs root permission to write to directory
},
'dm': {
'type': 'DMLDAP',
'handler': DMLDAP,
'command': 'ipa-custodia-dmldap',
'runas': None, # root
}
}
class IPASecStore(CSStore):
def __init__(self, config=None):
self.config = config
def _get_handler(self, key):
path = key.split('/', 3)
if len(path) != 3 or path[0] != 'keys':
raise ValueError('Invalid name')
if path[1] not in NAME_DB_MAP:
raise UnknownKeyName("Unknown DB named '%s'" % path[1])
dbmap = NAME_DB_MAP[path[1]]
return dbmap['handler'](self.config, dbmap, path[2])
def get(self, key):
try:
key_handler = self._get_handler(key)
value = key_handler.export_key()
except Exception as e: # pylint: disable=broad-except
log_error('Error retrieving key "%s": %s' % (key, str(e)))
value = None
return value
def set(self, key, value, replace=False):
try:
key_handler = self._get_handler(key)
key_handler.import_key(value)
except Exception as e: # pylint: disable=broad-except
log_error('Error storing key "%s": %s' % (key, str(e)))
def list(self, keyfilter=None):
raise NotImplementedError
def cut(self, key):
raise NotImplementedError
def span(self, key):
raise NotImplementedError
# backwards compatibility with FreeIPA 4.3 and 4.4.
iSecStore = IPASecStore
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