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# spn management
#
# Copyright Matthieu Patou mat@samba.org 2010
#
# 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 samba.getopt as options
import ldb
from samba import provision
from samba.samdb import SamDB
from samba.auth import system_session
from samba.netcmd.common import _get_user_realm_domain
from samba.netcmd import (
Command,
CommandError,
SuperCommand,
Option
)
class cmd_spn_list(Command):
"""List spns of a given user."""
synopsis = "%prog <user> [options]"
takes_optiongroups = {
"sambaopts": options.SambaOptions,
"credopts": options.CredentialsOptions,
"versionopts": options.VersionOptions,
}
takes_args = ["user"]
def run(self, user, credopts=None, sambaopts=None, versionopts=None):
lp = sambaopts.get_loadparm()
creds = credopts.get_credentials(lp)
paths = provision.provision_paths_from_lp(lp, lp.get("realm"))
sam = SamDB(paths.samdb, session_info=system_session(),
credentials=creds, lp=lp)
# TODO once I understand how, use the domain info to naildown
# to the correct domain
(cleaneduser, realm, domain) = _get_user_realm_domain(user)
self.outf.write(cleaneduser+"\n")
res = sam.search(
expression="samaccountname=%s" % ldb.binary_encode(cleaneduser),
scope=ldb.SCOPE_SUBTREE, attrs=["servicePrincipalName"])
if len(res) > 0:
spns = res[0].get("servicePrincipalName")
found = False
flag = ldb.FLAG_MOD_ADD
if spns is not None:
self.outf.write(
"User %s has the following servicePrincipalName: \n" %
res[0].dn)
for e in spns:
self.outf.write("\t %s\n" % e)
else:
self.outf.write("User %s has no servicePrincipalName\n" %
res[0].dn)
else:
raise CommandError("User %s not found" % user)
class cmd_spn_add(Command):
"""Create a new spn."""
synopsis = "%prog <name> <user> [options]"
takes_optiongroups = {
"sambaopts": options.SambaOptions,
"credopts": options.CredentialsOptions,
"versionopts": options.VersionOptions,
}
takes_options = [
Option("--force", help="Force the addition of the spn"
" even it exists already", action="store_true"),
]
takes_args = ["name", "user"]
def run(self, name, user, force=False, credopts=None, sambaopts=None,
versionopts=None):
lp = sambaopts.get_loadparm()
creds = credopts.get_credentials(lp)
paths = provision.provision_paths_from_lp(lp, lp.get("realm"))
sam = SamDB(paths.samdb, session_info=system_session(),
credentials=creds, lp=lp)
res = sam.search(
expression="servicePrincipalName=%s" % ldb.binary_encode(name),
scope=ldb.SCOPE_SUBTREE)
if len(res) != 0 and not force:
raise CommandError("Service principal %s already"
" affected to another user" % name)
(cleaneduser, realm, domain) = _get_user_realm_domain(user)
res = sam.search(
expression="samaccountname=%s" % ldb.binary_encode(cleaneduser),
scope=ldb.SCOPE_SUBTREE, attrs=["servicePrincipalName"])
if len(res) > 0:
res[0].dn
msg = ldb.Message()
spns = res[0].get("servicePrincipalName")
tab = []
found = False
flag = ldb.FLAG_MOD_ADD
if spns is not None:
for e in spns:
if str(e) == name:
found = True
tab.append(str(e))
flag = ldb.FLAG_MOD_REPLACE
tab.append(name)
msg.dn = res[0].dn
msg["servicePrincipalName"] = ldb.MessageElement(tab, flag,
"servicePrincipalName")
if not found:
sam.modify(msg)
else:
raise CommandError("Service principal %s already"
" affected to %s" % (name, user))
else:
raise CommandError("User %s not found" % user)
class cmd_spn_delete(Command):
"""Delete a spn."""
synopsis = "%prog <name> [user] [options]"
takes_optiongroups = {
"sambaopts": options.SambaOptions,
"credopts": options.CredentialsOptions,
"versionopts": options.VersionOptions,
}
takes_args = ["name", "user?"]
def run(self, name, user=None, credopts=None, sambaopts=None,
versionopts=None):
lp = sambaopts.get_loadparm()
creds = credopts.get_credentials(lp)
paths = provision.provision_paths_from_lp(lp, lp.get("realm"))
sam = SamDB(paths.samdb, session_info=system_session(),
credentials=creds, lp=lp)
res = sam.search(
expression="servicePrincipalName=%s" % ldb.binary_encode(name),
scope=ldb.SCOPE_SUBTREE,
attrs=["servicePrincipalName", "samAccountName"])
if len(res) > 0:
result = None
if user is not None:
(cleaneduser, realm, domain) = _get_user_realm_domain(user)
for elem in res:
if str(elem["samAccountName"]).lower() == cleaneduser:
result = elem
if result is None:
raise CommandError("Unable to find user %s with"
" spn %s" % (user, name))
else:
if len(res) != 1:
listUser = ""
for r in res:
listUser = "%s\n%s" % (listUser, str(r.dn))
raise CommandError("More than one user has the spn %s "
"and no specific user was specified, list of users"
" with this spn:%s" % (name, listUser))
else:
result = res[0]
msg = ldb.Message()
spns = result.get("servicePrincipalName")
tab = []
if spns is not None:
for e in spns:
if str(e) != name:
tab.append(str(e))
flag = ldb.FLAG_MOD_REPLACE
msg.dn = result.dn
msg["servicePrincipalName"] = ldb.MessageElement(tab, flag,
"servicePrincipalName")
sam.modify(msg)
else:
raise CommandError("Service principal %s not affected" % name)
class cmd_spn(SuperCommand):
"""Service Principal Name (SPN) management."""
subcommands = {}
subcommands["add"] = cmd_spn_add()
subcommands["list"] = cmd_spn_list()
subcommands["delete"] = cmd_spn_delete()
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