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freeipa/ipalib/plugins/vault.py
Petr Viktorin 27dabb4528 Modernize 'except' clauses 
The 'as' syntax works from Python 2 on, and Python 3 will
drop the "comma" syntax.

Reviewed-By: Tomas Babej <tbabej@redhat.com>
2015-08-12 18:17:23 +02:00

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# Authors:
# Endi S. Dewata <edewata@redhat.com>
#
# Copyright (C) 2015 Red Hat
# see file 'COPYING' for use and warranty information
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import base64
import getpass
import io
import json
import os
import sys
import tempfile
from cryptography.fernet import Fernet, InvalidToken
from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
from cryptography.hazmat.primitives.asymmetric import padding
from cryptography.hazmat.primitives.serialization import load_pem_public_key,\
load_pem_private_key
import nss.nss as nss
import krbV
from ipalib.frontend import Command, Object, Local
from ipalib import api, errors
from ipalib import Bytes, Str, Flag
from ipalib import output
from ipalib.crud import PKQuery, Retrieve, Update
from ipalib.plugable import Registry
from ipalib.plugins.baseldap import LDAPObject, LDAPCreate, LDAPDelete,\
LDAPSearch, LDAPUpdate, LDAPRetrieve, LDAPAddMember, LDAPRemoveMember,\
pkey_to_value
from ipalib.request import context
from ipalib.plugins.user import split_principal
from ipalib import _, ngettext
from ipaplatform.paths import paths
from ipapython.dn import DN
from ipapython.nsslib import current_dbdir
if api.env.in_server:
import pki.account
import pki.key
__doc__ = _("""
Vaults
""") + _("""
Manage vaults.
""") + _("""
Vault is a secure place to store a secret.
""") + _("""
Based on the ownership there are three vault categories:
* user/private vault
* service vault
* shared vault
""") + _("""
User vaults are vaults owned used by a particular user. Private
vaults are vaults owned the current user. Service vaults are
vaults owned by a service. Shared vaults are owned by the admin
but they can be used by other users or services.
""") + _("""
Based on the security mechanism there are three types of
vaults:
* standard vault
* symmetric vault
* asymmetric vault
""") + _("""
Standard vault uses a secure mechanism to transport and
store the secret. The secret can only be retrieved by users
that have access to the vault.
""") + _("""
Symmetric vault is similar to the standard vault, but it
pre-encrypts the secret using a password before transport.
The secret can only be retrieved using the same password.
""") + _("""
Asymmetric vault is similar to the standard vault, but it
pre-encrypts the secret using a public key before transport.
The secret can only be retrieved using the private key.
""") + _("""
EXAMPLES:
""") + _("""
List private vaults:
ipa vault-find
""") + _("""
List service vaults:
ipa vault-find --service <service name>
""") + _("""
List shared vaults:
ipa vault-find --shared
""") + _("""
List user vaults:
ipa vault-find --user <username>
""") + _("""
Add a private vault:
ipa vault-add <name>
""") + _("""
Add a service vault:
ipa vault-add <name> --service <service name>
""") + _("""
Add a shared vault:
ipa vault-add <name> --shared
""") + _("""
Add a user vault:
ipa vault-add <name> --user <username>
""") + _("""
Add a symmetric vault:
ipa vault-add <name> --type symmetric --password-file password.txt
""") + _("""
Add an asymmetric vault:
ipa vault-add <name> --type asymmetric --public-key-file public.pem
""") + _("""
Show a private vault:
ipa vault-show <name>
""") + _("""
Show a service vault:
ipa vault-show <name> --service <service name>
""") + _("""
Show a shared vault:
ipa vault-show <name> --shared
""") + _("""
Show a user vault:
ipa vault-show <name> --user <username>
""") + _("""
Modify a private vault:
ipa vault-mod <name> --desc <description>
""") + _("""
Modify a service vault:
ipa vault-mod <name> --service <service name> --desc <description>
""") + _("""
Modify a shared vault:
ipa vault-mod <name> --shared --desc <description>
""") + _("""
Modify a user vault:
ipa vault-mod <name> --user <username> --desc <description>
""") + _("""
Delete a private vault:
ipa vault-del <name>
""") + _("""
Delete a service vault:
ipa vault-del <name> --service <service name>
""") + _("""
Delete a shared vault:
ipa vault-del <name> --shared
""") + _("""
Delete a user vault:
ipa vault-del <name> --user <username>
""") + _("""
Display vault configuration:
ipa vaultconfig-show
""") + _("""
Archive data into private vault:
ipa vault-archive <name> --in <input file>
""") + _("""
Archive data into service vault:
ipa vault-archive <name> --service <service name> --in <input file>
""") + _("""
Archive data into shared vault:
ipa vault-archive <name> --shared --in <input file>
""") + _("""
Archive data into user vault:
ipa vault-archive <name> --user <username> --in <input file>
""") + _("""
Archive data into symmetric vault:
ipa vault-archive <name> --in <input file>
""") + _("""
Archive data into asymmetric vault:
ipa vault-archive <name> --in <input file>
""") + _("""
Retrieve data from private vault:
ipa vault-retrieve <name> --out <output file>
""") + _("""
Retrieve data from service vault:
ipa vault-retrieve <name> --service <service name> --out <output file>
""") + _("""
Retrieve data from shared vault:
ipa vault-retrieve <name> --shared --out <output file>
""") + _("""
Retrieve data from user vault:
ipa vault-retrieve <name> --user <username> --out <output file>
""") + _("""
Retrieve data from symmetric vault:
ipa vault-retrieve <name> --out data.bin
""") + _("""
Retrieve data from asymmetric vault:
ipa vault-retrieve <name> --out data.bin --private-key-file private.pem
""") + _("""
Add a vault owner:
ipa vault-add-owner <name> --users <usernames>
""") + _("""
Delete a vault owner:
ipa vault-remove-owner <name> --users <usernames>
""") + _("""
Add a vault member:
ipa vault-add-member <name> --users <usernames>
""") + _("""
Delete a vault member:
ipa vault-remove-member <name> --users <usernames>
""")
def validated_read(argname, filename, mode='r', encoding=None):
"""Read file and catch errors
IOError and UnicodeError (for text files) are turned into a
ValidationError
"""
try:
with io.open(filename, mode=mode, encoding=encoding) as f:
data = f.read()
except IOError as exc:
raise errors.ValidationError(
name=argname,
error=_("Cannot read file '%(filename)s': %(exc)s") % {
'filename': filename, 'exc': exc[1]
}
)
except UnicodeError as exc:
raise errors.ValidationError(
name=argname,
error=_("Cannot decode file '%(filename)s': %(exc)s") % {
'filename': filename, 'exc': exc
}
)
return data
register = Registry()
vault_options = (
Str(
'service?',
doc=_('Service name of the service vault'),
),
Flag(
'shared?',
doc=_('Shared vault'),
),
Str(
'username?',
cli_name='user',
doc=_('Username of the user vault'),
),
)
@register()
class vault(LDAPObject):
__doc__ = _("""
Vault object.
""")
container_dn = api.env.container_vault
object_name = _('vault')
object_name_plural = _('vaults')
object_class = ['ipaVault']
default_attributes = [
'cn',
'description',
'ipavaulttype',
'ipavaultsalt',
'ipavaultpublickey',
'owner',
'member',
]
search_display_attributes = [
'cn',
'description',
'ipavaulttype',
]
attribute_members = {
'owner': ['user', 'group'],
'member': ['user', 'group'],
}
label = _('Vaults')
label_singular = _('Vault')
takes_params = (
Str(
'cn',
cli_name='name',
label=_('Vault name'),
primary_key=True,
pattern='^[a-zA-Z0-9_.-]+$',
pattern_errmsg='may only include letters, numbers, _, ., and -',
maxlength=255,
),
Str(
'description?',
cli_name='desc',
label=_('Description'),
doc=_('Vault description'),
),
Str(
'ipavaulttype?',
cli_name='type',
label=_('Type'),
doc=_('Vault type'),
default=u'standard',
autofill=True,
),
Bytes(
'ipavaultsalt?',
cli_name='salt',
label=_('Salt'),
doc=_('Vault salt'),
flags=['no_search'],
),
Bytes(
'ipavaultpublickey?',
cli_name='public_key',
label=_('Public key'),
doc=_('Vault public key'),
flags=['no_search'],
),
Str(
'owner_user?',
label=_('Owner users'),
flags=['no_create', 'no_update', 'no_search'],
),
Str(
'owner_group?',
label=_('Owner groups'),
flags=['no_create', 'no_update', 'no_search'],
),
)
def get_dn(self, *keys, **options):
"""
Generates vault DN from parameters.
"""
service = options.get('service')
shared = options.get('shared')
user = options.get('username')
count = 0
if service:
count += 1
if shared:
count += 1
if user:
count += 1
if count > 1:
raise errors.MutuallyExclusiveError(
reason=_('Service, shared, and user options ' +
'cannot be specified simultaneously'))
# TODO: create container_dn after object initialization then reuse it
container_dn = DN(self.container_dn, self.api.env.basedn)
dn = super(vault, self).get_dn(*keys, **options)
assert dn.endswith(container_dn)
rdns = DN(*dn[:-len(container_dn)])
if not count:
principal = getattr(context, 'principal')
if principal.startswith('host/'):
raise errors.NotImplementedError(
reason=_('Host is not supported'))
(name, realm) = split_principal(principal)
if '/' in name:
service = name
else:
user = name
if service:
parent_dn = DN(('cn', service), ('cn', 'services'), container_dn)
elif shared:
parent_dn = DN(('cn', 'shared'), container_dn)
else:
parent_dn = DN(('cn', user), ('cn', 'users'), container_dn)
return DN(rdns, parent_dn)
def create_container(self, dn, owner_dn):
"""
Creates vault container and its parents.
"""
# TODO: create container_dn after object initialization then reuse it
container_dn = DN(self.container_dn, self.api.env.basedn)
entries = []
while dn:
assert dn.endswith(container_dn)
rdn = dn[0]
entry = self.backend.make_entry(
dn,
{
'objectclass': ['ipaVaultContainer'],
'cn': rdn['cn'],
'owner': [owner_dn],
})
# if entry can be added, return
try:
self.backend.add_entry(entry)
break
except errors.NotFound:
pass
# otherwise, create parent entry first
dn = DN(*dn[1:])
entries.insert(0, entry)
# then create the entries again
for entry in entries:
self.backend.add_entry(entry)
def get_key_id(self, dn):
"""
Generates a client key ID to archive/retrieve data in KRA.
"""
# TODO: create container_dn after object initialization then reuse it
container_dn = DN(self.container_dn, self.api.env.basedn)
# make sure the DN is a vault DN
if not dn.endswith(container_dn, 1):
raise ValueError('Invalid vault DN: %s' % dn)
# construct the vault ID from the bottom up
id = u''
for rdn in dn[:-len(container_dn)]:
name = rdn['cn']
id = u'/' + name + id
return 'ipa:' + id
def get_new_password(self):
"""
Gets new password from user and verify it.
"""
while True:
password = getpass.getpass('New password: ').decode(
sys.stdin.encoding)
password2 = getpass.getpass('Verify password: ').decode(
sys.stdin.encoding)
if password == password2:
return password
print ' ** Passwords do not match! **'
def get_existing_password(self, new=False):
"""
Gets existing password from user.
"""
return getpass.getpass('Password: ').decode(sys.stdin.encoding)
def generate_symmetric_key(self, password, salt):
"""
Generates symmetric key from password and salt.
"""
kdf = PBKDF2HMAC(
algorithm=hashes.SHA256(),
length=32,
salt=salt,
iterations=100000,
backend=default_backend()
)
return base64.b64encode(kdf.derive(password.encode('utf-8')))
def encrypt(self, data, symmetric_key=None, public_key=None):
"""
Encrypts data with symmetric key or public key.
"""
if symmetric_key:
fernet = Fernet(symmetric_key)
return fernet.encrypt(data)
elif public_key:
rsa_public_key = load_pem_public_key(
data=public_key,
backend=default_backend()
)
return rsa_public_key.encrypt(
data,
padding.OAEP(
mgf=padding.MGF1(algorithm=hashes.SHA1()),
algorithm=hashes.SHA1(),
label=None
)
)
def decrypt(self, data, symmetric_key=None, private_key=None):
"""
Decrypts data with symmetric key or public key.
"""
if symmetric_key:
try:
fernet = Fernet(symmetric_key)
return fernet.decrypt(data)
except InvalidToken:
raise errors.AuthenticationError(
message=_('Invalid credentials'))
elif private_key:
try:
rsa_private_key = load_pem_private_key(
data=private_key,
password=None,
backend=default_backend()
)
return rsa_private_key.decrypt(
data,
padding.OAEP(
mgf=padding.MGF1(algorithm=hashes.SHA1()),
algorithm=hashes.SHA1(),
label=None
)
)
except AssertionError:
raise errors.AuthenticationError(
message=_('Invalid credentials'))
@register()
class vault_add(PKQuery, Local):
__doc__ = _('Create a new vault.')
takes_options = LDAPCreate.takes_options + vault_options + (
Str(
'description?',
cli_name='desc',
doc=_('Vault description'),
),
Str(
'ipavaulttype?',
cli_name='type',
doc=_('Vault type'),
),
Str(
'password?',
cli_name='password',
doc=_('Vault password'),
),
Str( # TODO: use File parameter
'password_file?',
cli_name='password_file',
doc=_('File containing the vault password'),
),
Bytes(
'ipavaultpublickey?',
cli_name='public_key',
doc=_('Vault public key'),
),
Str( # TODO: use File parameter
'public_key_file?',
cli_name='public_key_file',
doc=_('File containing the vault public key'),
),
)
has_output = output.standard_entry
def forward(self, *args, **options):
vault_type = options.get('ipavaulttype', u'standard')
password = options.get('password')
password_file = options.get('password_file')
public_key = options.get('ipavaultpublickey')
public_key_file = options.get('public_key_file')
# don't send these parameters to server
if 'password' in options:
del options['password']
if 'password_file' in options:
del options['password_file']
if 'public_key_file' in options:
del options['public_key_file']
if vault_type != u'symmetric' and (password or password_file):
raise errors.MutuallyExclusiveError(
reason=_('Password can be specified only for '
'symmetric vault')
)
if vault_type != u'asymmetric' and (public_key or public_key_file):
raise errors.MutuallyExclusiveError(
reason=_('Public key can be specified only for '
'asymmetric vault')
)
if self.api.env.in_server:
backend = self.api.Backend.ldap2
else:
backend = self.api.Backend.rpcclient
if not backend.isconnected():
backend.connect(ccache=krbV.default_context().default_ccache())
if vault_type == u'standard':
pass
elif vault_type == u'symmetric':
# get password
if password and password_file:
raise errors.MutuallyExclusiveError(
reason=_('Password specified multiple times'))
elif password:
pass
elif password_file:
password = validated_read('password-file',
password_file,
encoding='utf-8')
password = password.rstrip('\n')
else:
password = self.obj.get_new_password()
# generate vault salt
options['ipavaultsalt'] = os.urandom(16)
elif vault_type == u'asymmetric':
# get new vault public key
if public_key and public_key_file:
raise errors.MutuallyExclusiveError(
reason=_('Public key specified multiple times'))
elif public_key:
pass
elif public_key_file:
public_key = validated_read('public-key-file',
public_key_file,
mode='rb')
# store vault public key
options['ipavaultpublickey'] = public_key
else:
raise errors.ValidationError(
name='ipavaultpublickey',
error=_('Missing vault public key'))
# create vault
response = self.api.Command.vault_add_internal(*args, **options)
# prepare parameters for archival
opts = options.copy()
if 'description' in opts:
del opts['description']
if 'ipavaulttype' in opts:
del opts['ipavaulttype']
if vault_type == u'symmetric':
opts['password'] = password
del opts['ipavaultsalt']
elif vault_type == u'asymmetric':
del opts['ipavaultpublickey']
# archive blank data
self.api.Command.vault_archive(*args, **opts)
return response
@register()
class vault_add_internal(LDAPCreate):
NO_CLI = True
takes_options = vault_options
msg_summary = _('Added vault "%(value)s"')
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys,
**options):
assert isinstance(dn, DN)
if not self.api.Command.kra_is_enabled()['result']:
raise errors.InvocationError(
format=_('KRA service is not enabled'))
principal = getattr(context, 'principal')
(name, realm) = split_principal(principal)
if '/' in name:
owner_dn = self.api.Object.service.get_dn(name)
else:
owner_dn = self.api.Object.user.get_dn(name)
try:
parent_dn = DN(*dn[1:])
self.obj.create_container(parent_dn, owner_dn)
except errors.DuplicateEntry as e:
pass
entry_attrs['owner'] = owner_dn
return dn
@register()
class vault_del(LDAPDelete):
__doc__ = _('Delete a vault.')
takes_options = LDAPDelete.takes_options + vault_options
msg_summary = _('Deleted vault "%(value)s"')
def pre_callback(self, ldap, dn, *keys, **options):
assert isinstance(dn, DN)
if not self.api.Command.kra_is_enabled()['result']:
raise errors.InvocationError(
format=_('KRA service is not enabled'))
return dn
def post_callback(self, ldap, dn, *args, **options):
assert isinstance(dn, DN)
kra_client = self.api.Backend.kra.get_client()
kra_account = pki.account.AccountClient(kra_client.connection)
kra_account.login()
client_key_id = self.obj.get_key_id(dn)
# deactivate vault record in KRA
response = kra_client.keys.list_keys(
client_key_id, pki.key.KeyClient.KEY_STATUS_ACTIVE)
for key_info in response.key_infos:
kra_client.keys.modify_key_status(
key_info.get_key_id(),
pki.key.KeyClient.KEY_STATUS_INACTIVE)
kra_account.logout()
return True
@register()
class vault_find(LDAPSearch):
__doc__ = _('Search for vaults.')
takes_options = LDAPSearch.takes_options + vault_options
has_output_params = LDAPSearch.has_output_params
msg_summary = ngettext(
'%(count)d vault matched',
'%(count)d vaults matched',
0,
)
def pre_callback(self, ldap, filter, attrs_list, base_dn, scope, *args,
**options):
assert isinstance(base_dn, DN)
if not self.api.Command.kra_is_enabled()['result']:
raise errors.InvocationError(
format=_('KRA service is not enabled'))
base_dn = self.obj.get_dn(*args, **options)
return (filter, base_dn, scope)
def exc_callback(self, args, options, exc, call_func, *call_args,
**call_kwargs):
if call_func.__name__ == 'find_entries':
if isinstance(exc, errors.NotFound):
# ignore missing containers since they will be created
# automatically on vault creation.
raise errors.EmptyResult(reason=str(exc))
raise exc
@register()
class vault_mod(LDAPUpdate):
__doc__ = _('Modify a vault.')
takes_options = LDAPUpdate.takes_options + vault_options
msg_summary = _('Modified vault "%(value)s"')
def pre_callback(self, ldap, dn, entry_attrs, attrs_list,
*keys, **options):
assert isinstance(dn, DN)
if not self.api.Command.kra_is_enabled()['result']:
raise errors.InvocationError(
format=_('KRA service is not enabled'))
return dn
@register()
class vault_show(LDAPRetrieve):
__doc__ = _('Display information about a vault.')
takes_options = LDAPRetrieve.takes_options + vault_options
has_output_params = LDAPRetrieve.has_output_params
def pre_callback(self, ldap, dn, attrs_list, *keys, **options):
assert isinstance(dn, DN)
if not self.api.Command.kra_is_enabled()['result']:
raise errors.InvocationError(
format=_('KRA service is not enabled'))
return dn
@register()
class vaultconfig(Object):
__doc__ = _('Vault configuration')
takes_params = (
Bytes(
'transport_cert',
label=_('Transport Certificate'),
),
)
@register()
class vaultconfig_show(Retrieve):
__doc__ = _('Show vault configuration.')
takes_options = (
Str(
'transport_out?',
doc=_('Output file to store the transport certificate'),
),
)
def forward(self, *args, **options):
file = options.get('transport_out')
# don't send these parameters to server
if 'transport_out' in options:
del options['transport_out']
response = super(vaultconfig_show, self).forward(*args, **options)
if file:
with open(file, 'w') as f:
f.write(response['result']['transport_cert'])
return response
def execute(self, *args, **options):
if not self.api.Command.kra_is_enabled()['result']:
raise errors.InvocationError(
format=_('KRA service is not enabled'))
kra_client = self.api.Backend.kra.get_client()
transport_cert = kra_client.system_certs.get_transport_cert()
return {
'result': {
'transport_cert': transport_cert.binary
},
'value': None,
}
@register()
class vault_archive(PKQuery, Local):
__doc__ = _('Archive data into a vault.')
takes_options = vault_options + (
Bytes(
'data?',
doc=_('Binary data to archive'),
),
Str( # TODO: use File parameter
'in?',
doc=_('File containing data to archive'),
),
Str(
'password?',
cli_name='password',
doc=_('Vault password'),
),
Str( # TODO: use File parameter
'password_file?',
cli_name='password_file',
doc=_('File containing the vault password'),
),
)
has_output = output.standard_entry
def forward(self, *args, **options):
name = args[-1]
data = options.get('data')
input_file = options.get('in')
password = options.get('password')
password_file = options.get('password_file')
# don't send these parameters to server
if 'data' in options:
del options['data']
if 'in' in options:
del options['in']
if 'password' in options:
del options['password']
if 'password_file' in options:
del options['password_file']
# get data
if data and input_file:
raise errors.MutuallyExclusiveError(
reason=_('Input data specified multiple times'))
elif input_file:
data = validated_read('in', input_file, mode='rb')
elif not data:
data = ''
if self.api.env.in_server:
backend = self.api.Backend.ldap2
else:
backend = self.api.Backend.rpcclient
if not backend.isconnected():
backend.connect(ccache=krbV.default_context().default_ccache())
# retrieve vault info
vault = self.api.Command.vault_show(*args, **options)['result']
vault_type = vault['ipavaulttype'][0]
if vault_type == u'standard':
encrypted_key = None
elif vault_type == u'symmetric':
# get password
if password and password_file:
raise errors.MutuallyExclusiveError(
reason=_('Password specified multiple times'))
elif password:
pass
elif password_file:
password = validated_read('password-file',
password_file,
encoding='utf-8')
password = password.rstrip('\n')
else:
password = self.obj.get_existing_password()
# verify password by retrieving existing data
opts = options.copy()
opts['password'] = password
try:
self.api.Command.vault_retrieve(*args, **opts)
except errors.NotFound:
pass
salt = vault['ipavaultsalt'][0]
# generate encryption key from vault password
encryption_key = self.obj.generate_symmetric_key(
password, salt)
# encrypt data with encryption key
data = self.obj.encrypt(data, symmetric_key=encryption_key)
encrypted_key = None
elif vault_type == u'asymmetric':
public_key = vault['ipavaultpublickey'][0].encode('utf-8')
# generate encryption key
encryption_key = base64.b64encode(os.urandom(32))
# encrypt data with encryption key
data = self.obj.encrypt(data, symmetric_key=encryption_key)
# encrypt encryption key with public key
encrypted_key = self.obj.encrypt(
encryption_key, public_key=public_key)
else:
raise errors.ValidationError(
name='vault_type',
error=_('Invalid vault type'))
# initialize NSS database
current_dbdir = paths.IPA_NSSDB_DIR
nss.nss_init(current_dbdir)
# retrieve transport certificate
config = self.api.Command.vaultconfig_show()['result']
transport_cert_der = config['transport_cert']
nss_transport_cert = nss.Certificate(transport_cert_der)
# generate session key
mechanism = nss.CKM_DES3_CBC_PAD
slot = nss.get_best_slot(mechanism)
key_length = slot.get_best_key_length(mechanism)
session_key = slot.key_gen(mechanism, None, key_length)
# wrap session key with transport certificate
public_key = nss_transport_cert.subject_public_key_info.public_key
wrapped_session_key = nss.pub_wrap_sym_key(mechanism,
public_key,
session_key)
options['session_key'] = wrapped_session_key.data
nonce_length = nss.get_iv_length(mechanism)
nonce = nss.generate_random(nonce_length)
options['nonce'] = nonce
vault_data = {}
vault_data[u'data'] = base64.b64encode(data).decode('utf-8')
if encrypted_key:
vault_data[u'encrypted_key'] = base64.b64encode(encrypted_key)\
.decode('utf-8')
json_vault_data = json.dumps(vault_data)
# wrap vault_data with session key
iv_si = nss.SecItem(nonce)
iv_param = nss.param_from_iv(mechanism, iv_si)
encoding_ctx = nss.create_context_by_sym_key(mechanism,
nss.CKA_ENCRYPT,
session_key,
iv_param)
wrapped_vault_data = encoding_ctx.cipher_op(json_vault_data)\
+ encoding_ctx.digest_final()
options['vault_data'] = wrapped_vault_data
return self.api.Command.vault_archive_internal(*args, **options)
@register()
class vault_archive_internal(PKQuery):
NO_CLI = True
takes_options = vault_options + (
Bytes(
'session_key',
doc=_('Session key wrapped with transport certificate'),
),
Bytes(
'vault_data',
doc=_('Vault data encrypted with session key'),
),
Bytes(
'nonce',
doc=_('Nonce'),
),
)
has_output = output.standard_entry
msg_summary = _('Archived data into vault "%(value)s"')
def execute(self, *args, **options):
if not self.api.Command.kra_is_enabled()['result']:
raise errors.InvocationError(
format=_('KRA service is not enabled'))
wrapped_vault_data = options.pop('vault_data')
nonce = options.pop('nonce')
wrapped_session_key = options.pop('session_key')
# retrieve vault info
vault = self.api.Command.vault_show(*args, **options)['result']
# connect to KRA
kra_client = self.api.Backend.kra.get_client()
kra_account = pki.account.AccountClient(kra_client.connection)
kra_account.login()
client_key_id = self.obj.get_key_id(vault['dn'])
# deactivate existing vault record in KRA
response = kra_client.keys.list_keys(
client_key_id,
pki.key.KeyClient.KEY_STATUS_ACTIVE)
for key_info in response.key_infos:
kra_client.keys.modify_key_status(
key_info.get_key_id(),
pki.key.KeyClient.KEY_STATUS_INACTIVE)
# forward wrapped data to KRA
kra_client.keys.archive_encrypted_data(
client_key_id,
pki.key.KeyClient.PASS_PHRASE_TYPE,
wrapped_vault_data,
wrapped_session_key,
None,
nonce,
)
kra_account.logout()
response = {
'value': args[-1],
'result': {},
}
response['summary'] = self.msg_summary % response
return response
@register()
class vault_retrieve(PKQuery, Local):
__doc__ = _('Retrieve a data from a vault.')
takes_options = vault_options + (
Str(
'out?',
doc=_('File to store retrieved data'),
),
Str(
'password?',
cli_name='password',
doc=_('Vault password'),
),
Str( # TODO: use File parameter
'password_file?',
cli_name='password_file',
doc=_('File containing the vault password'),
),
Bytes(
'private_key?',
cli_name='private_key',
doc=_('Vault private key'),
),
Str( # TODO: use File parameter
'private_key_file?',
cli_name='private_key_file',
doc=_('File containing the vault private key'),
),
)
has_output = output.standard_entry
has_output_params = (
Bytes(
'data',
label=_('Data'),
),
)
def forward(self, *args, **options):
name = args[-1]
output_file = options.get('out')
password = options.get('password')
password_file = options.get('password_file')
private_key = options.get('private_key')
private_key_file = options.get('private_key_file')
# don't send these parameters to server
if 'out' in options:
del options['out']
if 'password' in options:
del options['password']
if 'password_file' in options:
del options['password_file']
if 'private_key' in options:
del options['private_key']
if 'private_key_file' in options:
del options['private_key_file']
if self.api.env.in_server:
backend = self.api.Backend.ldap2
else:
backend = self.api.Backend.rpcclient
if not backend.isconnected():
backend.connect(ccache=krbV.default_context().default_ccache())
# retrieve vault info
vault = self.api.Command.vault_show(*args, **options)['result']
vault_type = vault['ipavaulttype'][0]
# initialize NSS database
current_dbdir = paths.IPA_NSSDB_DIR
nss.nss_init(current_dbdir)
# retrieve transport certificate
config = self.api.Command.vaultconfig_show()['result']
transport_cert_der = config['transport_cert']
nss_transport_cert = nss.Certificate(transport_cert_der)
# generate session key
mechanism = nss.CKM_DES3_CBC_PAD
slot = nss.get_best_slot(mechanism)
key_length = slot.get_best_key_length(mechanism)
session_key = slot.key_gen(mechanism, None, key_length)
# wrap session key with transport certificate
public_key = nss_transport_cert.subject_public_key_info.public_key
wrapped_session_key = nss.pub_wrap_sym_key(mechanism,
public_key,
session_key)
# send retrieval request to server
options['session_key'] = wrapped_session_key.data
response = self.api.Command.vault_retrieve_internal(*args, **options)
result = response['result']
nonce = result['nonce']
# unwrap data with session key
wrapped_vault_data = result['vault_data']
iv_si = nss.SecItem(nonce)
iv_param = nss.param_from_iv(mechanism, iv_si)
decoding_ctx = nss.create_context_by_sym_key(mechanism,
nss.CKA_DECRYPT,
session_key,
iv_param)
json_vault_data = decoding_ctx.cipher_op(wrapped_vault_data)\
+ decoding_ctx.digest_final()
vault_data = json.loads(json_vault_data)
data = base64.b64decode(vault_data[u'data'].encode('utf-8'))
encrypted_key = None
if 'encrypted_key' in vault_data:
encrypted_key = base64.b64decode(vault_data[u'encrypted_key']
.encode('utf-8'))
if vault_type == u'standard':
pass
elif vault_type == u'symmetric':
salt = vault['ipavaultsalt'][0]
# get encryption key from vault password
if password and password_file:
raise errors.MutuallyExclusiveError(
reason=_('Password specified multiple times'))
elif password:
pass
elif password_file:
password = validated_read('password-file',
password_file,
encoding='utf-8')
password = password.rstrip('\n')
else:
password = self.obj.get_existing_password()
# generate encryption key from password
encryption_key = self.obj.generate_symmetric_key(password, salt)
# decrypt data with encryption key
data = self.obj.decrypt(data, symmetric_key=encryption_key)
elif vault_type == u'asymmetric':
# get encryption key with vault private key
if private_key and private_key_file:
raise errors.MutuallyExclusiveError(
reason=_('Private key specified multiple times'))
elif private_key:
pass
elif private_key_file:
private_key = validated_read('private-key-file',
private_key_file,
mode='rb')
else:
raise errors.ValidationError(
name='private_key',
error=_('Missing vault private key'))
# decrypt encryption key with private key
encryption_key = self.obj.decrypt(
encrypted_key, private_key=private_key)
# decrypt data with encryption key
data = self.obj.decrypt(data, symmetric_key=encryption_key)
else:
raise errors.ValidationError(
name='vault_type',
error=_('Invalid vault type'))
if output_file:
with open(output_file, 'w') as f:
f.write(data)
else:
response['result'] = {'data': data}
return response
@register()
class vault_retrieve_internal(PKQuery):
NO_CLI = True
takes_options = vault_options + (
Bytes(
'session_key',
doc=_('Session key wrapped with transport certificate'),
),
)
has_output = output.standard_entry
msg_summary = _('Retrieved data from vault "%(value)s"')
def execute(self, *args, **options):
if not self.api.Command.kra_is_enabled()['result']:
raise errors.InvocationError(
format=_('KRA service is not enabled'))
wrapped_session_key = options.pop('session_key')
# retrieve vault info
vault = self.api.Command.vault_show(*args, **options)['result']
# connect to KRA
kra_client = self.api.Backend.kra.get_client()
kra_account = pki.account.AccountClient(kra_client.connection)
kra_account.login()
client_key_id = self.obj.get_key_id(vault['dn'])
# find vault record in KRA
response = kra_client.keys.list_keys(
client_key_id,
pki.key.KeyClient.KEY_STATUS_ACTIVE)
if not len(response.key_infos):
raise errors.NotFound(reason=_('No archived data.'))
key_info = response.key_infos[0]
# retrieve encrypted data from KRA
key = kra_client.keys.retrieve_key(
key_info.get_key_id(),
wrapped_session_key)
kra_account.logout()
response = {
'value': args[-1],
'result': {
'vault_data': key.encrypted_data,
'nonce': key.nonce_data,
},
}
response['summary'] = self.msg_summary % response
return response
@register()
class vault_add_owner(LDAPAddMember):
__doc__ = _('Add owners to a vault.')
takes_options = LDAPAddMember.takes_options + vault_options
member_attributes = ['owner']
member_count_out = ('%i owner added.', '%i owners added.')
has_output = (
output.Entry('result'),
output.Output(
'failed',
type=dict,
doc=_('Owners that could not be added'),
),
output.Output(
'completed',
type=int,
doc=_('Number of owners added'),
),
)
@register()
class vault_remove_owner(LDAPRemoveMember):
__doc__ = _('Remove owners from a vault.')
takes_options = LDAPRemoveMember.takes_options + vault_options
member_attributes = ['owner']
member_count_out = ('%i owner removed.', '%i owners removed.')
has_output = (
output.Entry('result'),
output.Output(
'failed',
type=dict,
doc=_('Owners that could not be removed'),
),
output.Output(
'completed',
type=int,
doc=_('Number of owners removed'),
),
)
@register()
class vault_add_member(LDAPAddMember):
__doc__ = _('Add members to a vault.')
takes_options = LDAPAddMember.takes_options + vault_options
@register()
class vault_remove_member(LDAPRemoveMember):
__doc__ = _('Remove members from a vault.')
takes_options = LDAPRemoveMember.takes_options + vault_options
@register()
class kra_is_enabled(Command):
NO_CLI = True
has_output = output.standard_value
def execute(self, *args, **options):
base_dn = DN(('cn', 'masters'), ('cn', 'ipa'), ('cn', 'etc'),
self.api.env.basedn)
filter = '(&(objectClass=ipaConfigObject)(cn=KRA))'
try:
self.api.Backend.ldap2.find_entries(
base_dn=base_dn, filter=filter, attrs_list=[])
except errors.NotFound:
result = False
else:
result = True
return dict(result=result, value=pkey_to_value(None, options))
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