def change_principal(principal, password=None, client=None, path=None,
canonicalize=False, enterprise=False, keytab=None):
"""Temporarily change the kerberos principal
Most of the test cases run with the admin ipa user which is granted
all access and exceptions from rules on some occasions.
When the test needs to test for an application of some kind
of a restriction it needs to authenticate as a different principal
with required set of rights to the operation.
The context manager changes the principal identity in two ways:
* using password
* using keytab
If the context manager is to be used with a keytab, the keytab
option must be its absolute path.
The context manager can be used to authenticate with enterprise
principals and aliases when given respective options.
"""
if path:
ccache_name = path
else:
ccache_name = os.path.join('/tmp', str(uuid.uuid4()))
if client is None:
client = api
client.Backend.rpcclient.disconnect()
try:
if keytab:
kinit_keytab(principal, keytab, ccache_name)
else:
kinit_password(principal, password, ccache_name,
canonicalize=canonicalize,
enterprise=enterprise)
client.Backend.rpcclient.connect(ccache=ccache_name)
try:
yield
finally:
client.Backend.rpcclient.disconnect()
finally:
# If we generated a ccache name, try to remove it, but don't fail
if not path:
try:
os.remove(ccache_name)
except OSError:
pass
client.Backend.rpcclient.connect()
def temp_kinit(principal, password):
"""
kinit with password using a temporary ccache
"""
if not password:
raise RuntimeError("The password is not set")
if not principal:
principal = "admin"
ccache_dir = tempfile.mkdtemp(prefix='krbcc')
ccache_name = os.path.join(ccache_dir, 'ccache')
try:
kinit_password(principal, password, ccache_name)
except RuntimeError as e:
raise RuntimeError("Kerberos authentication failed: {}".format(e))
return ccache_dir, ccache_name
def kinit(self, principal, password, ccache_name):
# get anonymous ccache as an armor for FAST to enable OTP auth
armor_path = os.path.join(paths.IPA_CCACHES,
"armor_{}".format(os.getpid()))
self.debug('Obtaining armor in ccache %s', armor_path)
try:
kinit_armor(
armor_path,
pkinit_anchors=[paths.KDC_CERT, paths.KDC_CA_BUNDLE_PEM],
)
except RuntimeError as e:
self.error("Failed to obtain armor cache")
# We try to continue w/o armor, 2FA will be impacted
armor_path = None
try:
kinit_password(
unicode(principal),
password,
ccache_name,
armor_ccache_name=armor_path,
enterprise=True,
lifetime=self.api.env.kinit_lifetime)
if armor_path:
self.debug('Cleanup the armor ccache')
ipautil.run([paths.KDESTROY, '-A', '-c', armor_path],
env={'KRB5CCNAME': armor_path}, raiseonerr=False)
except RuntimeError as e:
if ('kinit: Cannot read password while '
'getting initial credentials') in str(e):
raise PasswordExpired(principal=principal, message=unicode(e))
elif ('kinit: Client\'s entry in database'
' has expired while getting initial credentials') in str(e):
raise KrbPrincipalExpired(principal=principal,
message=unicode(e))
elif ('kinit: Clients credentials have been revoked '
'while getting initial credentials') in str(e):
raise UserLocked(principal=principal,
message=unicode(e))
raise InvalidSessionPassword(principal=principal,
message=unicode(e))
def kinit(self, user, realm, password, ccache_name):
# get http service ccache as an armor for FAST to enable OTP authentication
armor_principal = str(
krb5_format_service_principal_name('HTTP', self.api.env.host,
realm))
keytab = paths.IPA_KEYTAB
armor_name = "%sA_%s" % (krbccache_prefix, user)
armor_path = os.path.join(krbccache_dir, armor_name)
self.debug('Obtaining armor ccache: principal=%s keytab=%s ccache=%s',
armor_principal, keytab, armor_path)
try:
kinit_keytab(armor_principal, paths.IPA_KEYTAB, armor_path)
except gssapi.exceptions.GSSError as e:
raise CCacheError(message=unicode(e))
# Format the user as a kerberos principal
principal = krb5_format_principal_name(user, realm)
try:
kinit_password(principal,
password,
ccache_name,
armor_ccache_name=armor_path)
self.debug('Cleanup the armor ccache')
ipautil.run([paths.KDESTROY, '-A', '-c', armor_path],
env={'KRB5CCNAME': armor_path},
raiseonerr=False)
except RuntimeError as e:
if ('kinit: Cannot read password while '
'getting initial credentials') in str(e):
raise PasswordExpired(principal=principal, message=unicode(e))
elif ('kinit: Client\'s entry in database'
' has expired while getting initial credentials') in str(e):
raise KrbPrincipalExpired(principal=principal,
message=unicode(e))
elif ('kinit: Clients credentials have been revoked '
'while getting initial credentials') in str(e):
raise UserLocked(principal=principal, message=unicode(e))
raise InvalidSessionPassword(principal=principal,
message=unicode(e))
def kinit(self, user, realm, password, ccache_name):
# get http service ccache as an armor for FAST to enable OTP authentication
armor_principal = str(krb5_format_service_principal_name(
'HTTP', self.api.env.host, realm))
keytab = paths.IPA_KEYTAB
armor_name = "%sA_%s" % (krbccache_prefix, user)
armor_path = os.path.join(krbccache_dir, armor_name)
self.debug('Obtaining armor ccache: principal=%s keytab=%s ccache=%s',
armor_principal, keytab, armor_path)
try:
kinit_keytab(armor_principal, paths.IPA_KEYTAB, armor_path)
except gssapi.exceptions.GSSError as e:
raise CCacheError(message=unicode(e))
# Format the user as a kerberos principal
principal = krb5_format_principal_name(user, realm)
try:
kinit_password(principal, password, ccache_name,
armor_ccache_name=armor_path)
self.debug('Cleanup the armor ccache')
ipautil.run(
[paths.KDESTROY, '-A', '-c', armor_path],
env={'KRB5CCNAME': armor_path},
raiseonerr=False)
except RuntimeError as e:
if ('kinit: Cannot read password while '
'getting initial credentials') in str(e):
raise PasswordExpired(principal=principal, message=unicode(e))
elif ('kinit: Client\'s entry in database'
' has expired while getting initial credentials') in str(e):
raise KrbPrincipalExpired(principal=principal,
message=unicode(e))
elif ('kinit: Clients credentials have been revoked '
'while getting initial credentials') in str(e):
raise UserLocked(principal=principal,
message=unicode(e))
raise InvalidSessionPassword(principal=principal,
message=unicode(e))
def check_creds(options, realm_name):
# Check if ccache is available
default_cred = None
try:
logger.debug('KRB5CCNAME set to %s',
os.environ.get('KRB5CCNAME', None))
# get default creds, will raise if none found
default_cred = gssapi.creds.Credentials()
principal = str(default_cred.name)
except gssapi.raw.misc.GSSError as e:
logger.debug('Failed to find default ccache: %s', e)
principal = None
# Check if the principal matches the requested one (if any)
if principal is not None and options.principal is not None:
op = options.principal
if op.find('@') == -1:
op = '%s@%s' % (op, realm_name)
if principal != op:
logger.debug('Specified principal %s does not match '
'available credentials (%s)',
options.principal, principal)
principal = None
if principal is None:
(ccache_fd, ccache_name) = tempfile.mkstemp()
os.close(ccache_fd)
options.created_ccache_file = ccache_name
if options.principal is not None:
principal = options.principal
else:
principal = 'admin'
stdin = None
if principal.find('@') == -1:
principal = '%s@%s' % (principal, realm_name)
if options.admin_password is not None:
stdin = options.admin_password
else:
if not options.unattended:
try:
stdin = getpass.getpass("Password for %s: " % principal)
except EOFError:
stdin = None
if not stdin:
logger.error(
"Password must be provided for %s.", principal)
raise ScriptError("Missing password for %s" % principal)
else:
if sys.stdin.isatty():
logger.error("Password must be provided in "
"non-interactive mode.")
logger.info("This can be done via "
"echo password | ipa-client-install "
"... or with the -w option.")
raise ScriptError("Missing password for %s" % principal)
else:
stdin = sys.stdin.readline()
# set options.admin_password for future use
options.admin_password = stdin
try:
kinit_password(principal, stdin, ccache_name)
except RuntimeError as e:
logger.error("Kerberos authentication failed: %s", e)
raise ScriptError("Invalid credentials: %s" % e)
os.environ['KRB5CCNAME'] = ccache_name
def change_principal(principal,
password=None,
client=None,
path=None,
canonicalize=False,
enterprise=False,
keytab=None):
"""Temporarily change the kerberos principal
Most of the test cases run with the admin ipa user which is granted
all access and exceptions from rules on some occasions.
When the test needs to test for an application of some kind
of a restriction it needs to authenticate as a different principal
with required set of rights to the operation.
The context manager changes the principal identity in two ways:
* using password
* using keytab
If the context manager is to be used with a keytab, the keytab
option must be its absolute path.
The context manager can be used to authenticate with enterprise
principals and aliases when given respective options.
"""
if path:
ccache_name = path
else:
ccache_name = os.path.join('/tmp', str(uuid.uuid4()))
if client is None:
client = api
client.Backend.rpcclient.disconnect()
try:
if keytab:
kinit_keytab(principal, keytab, ccache_name)
else:
kinit_password(principal,
password,
ccache_name,
canonicalize=canonicalize,
enterprise=enterprise)
client.Backend.rpcclient.connect(ccache=ccache_name)
try:
yield
finally:
client.Backend.rpcclient.disconnect()
finally:
# If we generated a ccache name, try to remove it, but don't fail
if not path:
try:
os.remove(ccache_name)
except OSError:
pass
client.Backend.rpcclient.connect()
def main():
module = AnsibleModule(
argument_spec = dict(
servers=dict(required=True, type='list'),
domain=dict(required=True),
realm=dict(required=True),
hostname=dict(required=True),
kdc=dict(required=True),
basedn=dict(required=True),
principal=dict(required=False),
password=dict(required=False, no_log=True),
keytab=dict(required=False),
ca_cert_file=dict(required=False),
force_join=dict(required=False, type='bool'),
kinit_attempts=dict(required=False, type='int', default=5),
debug=dict(required=False, type='bool'),
),
supports_check_mode = True,
)
module._ansible_debug = True
servers = module.params.get('servers')
domain = module.params.get('domain')
realm = module.params.get('realm')
hostname = module.params.get('hostname')
basedn = module.params.get('basedn')
kdc = module.params.get('kdc')
force_join = module.params.get('force_join')
principal = module.params.get('principal')
password = module.params.get('password')
keytab = module.params.get('keytab')
ca_cert_file = module.params.get('ca_cert_file')
kinit_attempts = module.params.get('kinit_attempts')
debug = module.params.get('debug')
if password is not None and password != "" and \
keytab is not None and keytab != "":
module.fail_json(msg="Password and keytab cannot be used together")
client_domain = hostname[hostname.find(".")+1:]
nolog = tuple()
env = {'PATH': SECURE_PATH}
fstore = sysrestore.FileStore(paths.IPA_CLIENT_SYSRESTORE)
host_principal = 'host/%s@%s' % (hostname, realm)
sssd = True
options.ca_cert_file = ca_cert_file
options.unattended = True
options.principal = principal if principal != "" else None
options.force = False
options.password = password
ccache_dir = None
changed = False
already_joined = False
try:
(krb_fd, krb_name) = tempfile.mkstemp()
os.close(krb_fd)
configure_krb5_conf(
cli_realm=realm,
cli_domain=domain,
cli_server=servers,
cli_kdc=kdc,
dnsok=False,
filename=krb_name,
client_domain=client_domain,
client_hostname=hostname,
configure_sssd=sssd,
force=False)
env['KRB5_CONFIG'] = krb_name
ccache_dir = tempfile.mkdtemp(prefix='krbcc')
ccache_name = os.path.join(ccache_dir, 'ccache')
join_args = [paths.SBIN_IPA_JOIN,
"-s", servers[0],
"-b", str(realm_to_suffix(realm)),
"-h", hostname]
if debug:
join_args.append("-d")
env['XMLRPC_TRACE_CURL'] = 'yes'
if force_join:
join_args.append("-f")
if principal:
if principal.find('@') == -1:
principal = '%s@%s' % (principal, realm)
try:
kinit_password(principal, password, ccache_name,
config=krb_name)
except RuntimeError as e:
module.fail_json(
msg="Kerberos authentication failed: {}".format(e))
elif keytab:
join_args.append("-f")
if os.path.exists(keytab):
try:
kinit_keytab(host_principal,
keytab,
ccache_name,
config=krb_name,
attempts=kinit_attempts)
except gssapi.exceptions.GSSError as e:
module.fail_json(
msg="Kerberos authentication failed: {}".format(e))
else:
module.fail_json(
msg="Keytab file could not be found: {}".format(keytab))
elif password:
join_args.append("-w")
join_args.append(password)
nolog = (password,)
env['KRB5CCNAME'] = os.environ['KRB5CCNAME'] = ccache_name
# Get the CA certificate
try:
os.environ['KRB5_CONFIG'] = env['KRB5_CONFIG']
if NUM_VERSION < 40100:
get_ca_cert(fstore, options, servers[0], basedn)
else:
get_ca_certs(fstore, options, servers[0], basedn, realm)
del os.environ['KRB5_CONFIG']
except errors.FileError as e:
module.fail_json(msg='%s' % e)
except Exception as e:
module.fail_json(msg="Cannot obtain CA certificate\n%s" % e)
# Now join the domain
result = run(
join_args, raiseonerr=False, env=env, nolog=nolog,
capture_error=True)
stderr = result.error_output
if result.returncode != 0:
if result.returncode == 13:
already_joined = True
module.log("Host is already joined")
else:
if principal:
run(["kdestroy"], raiseonerr=False, env=env)
module.fail_json(msg="Joining realm failed: %s" % stderr)
else:
changed = True
module.log("Enrolled in IPA realm %s" % realm)
# Fail for missing krb5.keytab on already joined host
if already_joined and not os.path.exists(paths.KRB5_KEYTAB):
module.fail_json(msg="krb5.keytab missing! Retry with ipaclient_force_join=yes to generate a new one.")
if principal:
run(["kdestroy"], raiseonerr=False, env=env)
# Obtain the TGT. We do it with the temporary krb5.conf, sot
# tha only the KDC we're installing under is contacted.
# Other KDCs might not have replicated the principal yet.
# Once we have the TGT, it's usable on any server.
try:
kinit_keytab(host_principal, paths.KRB5_KEYTAB,
paths.IPA_DNS_CCACHE,
config=krb_name,
attempts=kinit_attempts)
env['KRB5CCNAME'] = os.environ['KRB5CCNAME'] = paths.IPA_DNS_CCACHE
except gssapi.exceptions.GSSError as e:
# failure to get ticket makes it impossible to login and
# bind from sssd to LDAP, abort installation
module.fail_json(msg="Failed to obtain host TGT: %s" % e)
finally:
try:
os.remove(krb_name)
except OSError:
module.fail_json(msg="Could not remove %s" % krb_name)
if ccache_dir is not None:
try:
os.rmdir(ccache_dir)
except OSError:
pass
if os.path.exists(krb_name + ".ipabkp"):
try:
os.remove(krb_name + ".ipabkp")
except OSError:
module.fail_json(msg="Could not remove %s.ipabkp" % krb_name)
module.exit_json(changed=changed,
already_joined=already_joined)
def check_creds(options, realm_name):
# Check if ccache is available
default_cred = None
try:
logger.debug('KRB5CCNAME set to %s',
os.environ.get('KRB5CCNAME', None))
# get default creds, will raise if none found
default_cred = gssapi.creds.Credentials()
principal = str(default_cred.name)
except gssapi.raw.misc.GSSError as e:
logger.debug('Failed to find default ccache: %s', e)
principal = None
# Check if the principal matches the requested one (if any)
if principal is not None and options.principal is not None:
op = options.principal
if op.find('@') == -1:
op = '%s@%s' % (op, realm_name)
if principal != op:
logger.debug('Specified principal %s does not match '
'available credentials (%s)',
options.principal, principal)
principal = None
if principal is None:
(ccache_fd, ccache_name) = tempfile.mkstemp()
os.close(ccache_fd)
options.created_ccache_file = ccache_name
if options.principal is not None:
principal = options.principal
else:
principal = 'admin'
stdin = None
if principal.find('@') == -1:
principal = '%s@%s' % (principal, realm_name)
if options.admin_password is not None:
stdin = options.admin_password
else:
if not options.unattended:
try:
stdin = getpass.getpass("Password for %s: " % principal)
except EOFError:
stdin = None
if not stdin:
logger.error(
"Password must be provided for %s.", principal)
raise ScriptError("Missing password for %s" % principal)
else:
if sys.stdin.isatty():
logger.error("Password must be provided in "
"non-interactive mode.")
logger.info("This can be done via "
"echo password | ipa-client-install "
"... or with the -w option.")
raise ScriptError("Missing password for %s" % principal)
else:
stdin = sys.stdin.readline()
# set options.admin_password for future use
options.admin_password = stdin
try:
kinit_password(principal, stdin, ccache_name)
except RuntimeError as e:
logger.error("Kerberos authentication failed: %s", e)
raise ScriptError("Invalid credentials: %s" % e)
os.environ['KRB5CCNAME'] = ccache_name