def export_key(self):
tdir = tempfile.mkdtemp(dir=paths.TMP)
try:
wrapped_key_file = os.path.join(tdir, 'wrapped_key')
certificate_file = os.path.join(tdir, 'certificate')
ipautil.run([
paths.PKI, '-d', self.nssdb_path, '-C', self.nssdb_pwdfile,
'ca-authority-key-export',
'--wrap-nickname', self.wrap_nick,
'--target-nickname', self.target_nick,
'-o', wrapped_key_file])
nssdb = NSSDatabase(self.nssdb_path)
nssdb.run_certutil([
'-L', '-n', self.target_nick,
'-a', '-o', certificate_file,
])
with open(wrapped_key_file, 'rb') as f:
wrapped_key = f.read()
with open(certificate_file, 'r') as f:
certificate = f.read()
finally:
shutil.rmtree(tdir)
return json_encode({
'wrapped_key': b64encode(wrapped_key).decode('ascii'),
'certificate': certificate})
def export_key(args, tmpdir):
"""Export key and certificate from the NSS DB
The private key is encrypted using key wrapping.
"""
wrapped_key_file = os.path.join(tmpdir, 'wrapped_key')
certificate_file = os.path.join(tmpdir, 'certificate')
ipautil.run([
paths.PKI,
'-d', args.nssdb_path,
'-C', args.nssdb_pwdfile,
'ca-authority-key-export',
'--wrap-nickname', args.wrap_nickname,
'--target-nickname', args.nickname,
'-o', wrapped_key_file
])
nssdb = NSSDatabase(args.nssdb_path)
nssdb.run_certutil([
'-L',
'-n', args.nickname,
'-a',
'-o', certificate_file,
])
with open(wrapped_key_file, 'rb') as f:
wrapped_key = f.read()
with open(certificate_file, 'r') as f:
certificate = f.read()
data = {
'wrapped_key': wrapped_key,
'certificate': certificate
}
common.json_dump(data, args.exportfile)
def export_key(args, tmpdir):
"""Export key and certificate from the NSS DB to a PKCS#12 file.
The PKCS#12 file is encrypted with a password.
"""
pk12file = os.path.join(tmpdir, 'export.p12')
password = ipautil.ipa_generate_password()
pk12pk12pwfile = os.path.join(tmpdir, 'passwd')
with open(pk12pk12pwfile, 'w') as f:
f.write(password)
nssdb = NSSDatabase(args.nssdb_path)
nssdb.run_pk12util([
"-o", pk12file,
"-n", args.nickname,
"-k", args.nssdb_pwdfile,
"-w", pk12pk12pwfile,
])
with open(pk12file, 'rb') as f:
p12data = f.read()
data = {
'export password': password,
'pkcs12 data': p12data,
}
common.json_dump(data, args.exportfile)
def __get_keys(self, ca_host, cacerts_file, cacerts_pwd, data):
# Fecth all needed certs one by one, then combine them in a single
# p12 file
prefix = data['prefix']
certlist = data['list']
cli = self.__CustodiaClient(server=ca_host)
# Temporary nssdb
tmpnssdir = tempfile.mkdtemp(dir=paths.TMP)
tmpdb = NSSDatabase(tmpnssdir)
tmpdb.create_db()
try:
# Cert file password
crtpwfile = os.path.join(tmpnssdir, 'crtpwfile')
with open(crtpwfile, 'w+') as f:
f.write(cacerts_pwd)
f.flush()
for nickname in certlist:
value = cli.fetch_key(os.path.join(prefix, nickname), False)
v = json_decode(value)
pk12pwfile = os.path.join(tmpnssdir, 'pk12pwfile')
with open(pk12pwfile, 'w+') as f:
f.write(v['export password'])
pk12file = os.path.join(tmpnssdir, 'pk12file')
with open(pk12file, 'wb') as f:
f.write(b64decode(v['pkcs12 data']))
ipautil.run([paths.PK12UTIL,
'-d', tmpdb.secdir,
'-k', tmpdb.pwd_file,
'-n', nickname,
'-i', pk12file,
'-w', pk12pwfile])
# Add CA certificates
self.suffix = ipautil.realm_to_suffix(self.realm)
self.export_ca_certs_nssdb(tmpdb, True)
# Now that we gathered all certs, re-export
ipautil.run([paths.PKCS12EXPORT,
'-d', tmpdb.secdir,
'-p', tmpdb.pwd_file,
'-w', crtpwfile,
'-o', cacerts_file])
finally:
shutil.rmtree(tmpnssdir)
def setup(self):
self.nssdb = NSSDatabase()
secdir = self.nssdb.secdir
self.reqfile = os.path.join(secdir, "test.csr")
self.certfile = os.path.join(secdir, "cert.crt")
# Create our temporary NSS database
self.nssdb.create_db()
self.subject = DN(('CN', self.host_fqdn), subject_base())
def __init__(self, realm, nssdir, fstore=None,
host_name=None, subject_base=None, ca_subject=None,
user=None, group=None, mode=None, create=False):
self.nssdb = NSSDatabase(nssdir)
self.secdir = nssdir
self.realm = realm
self.noise_fname = self.secdir + "/noise.txt"
self.certdb_fname = self.secdir + "/cert8.db"
self.keydb_fname = self.secdir + "/key3.db"
self.secmod_fname = self.secdir + "/secmod.db"
self.pk12_fname = self.secdir + "/cacert.p12"
self.pin_fname = self.secdir + "/pin.txt"
self.reqdir = None
self.certreq_fname = None
self.certder_fname = None
self.host_name = host_name
self.ca_subject = ca_subject
self.subject_base = subject_base
try:
self.cwd = os.path.abspath(os.getcwd())
except OSError as e:
raise RuntimeError(
"Unable to determine the current directory: %s" % str(e))
self.cacert_name = get_ca_nickname(self.realm)
self.user = user
self.group = group
self.mode = mode
self.uid = 0
self.gid = 0
if not create:
if os.path.isdir(self.secdir):
# We are going to set the owner of all of the cert
# files to the owner of the containing directory
# instead of that of the process. This works when
# this is called by root for a daemon that runs as
# a normal user
mode = os.stat(self.secdir)
self.uid = mode[stat.ST_UID]
self.gid = mode[stat.ST_GID]
else:
if user is not None:
pu = pwd.getpwnam(user)
self.uid = pu.pw_uid
self.gid = pu.pw_gid
if group is not None:
self.gid = grp.getgrnam(group).gr_gid
self.create_certdbs()
if fstore:
self.fstore = fstore
else:
self.fstore = sysrestore.FileStore(paths.SYSRESTORE)
def import_key(self, value):
v = json_decode(value)
tdir = tempfile.mkdtemp(dir=paths.TMP)
try:
pk12pwfile = os.path.join(tdir, 'pk12pwfile')
with open(pk12pwfile, 'w') as f:
f.write(v['export password'])
pk12file = os.path.join(tdir, 'pk12file')
with open(pk12file, 'wb') as f:
f.write(b64decode(v['pkcs12 data']))
nssdb = NSSDatabase(self.nssdb_path)
nssdb.run_pk12util([
"-i", pk12file,
"-n", self.nickname,
"-k", self.nssdb_pwdfile,
"-w", pk12pwfile,
])
finally:
shutil.rmtree(tdir)
def export_key(self):
tdir = tempfile.mkdtemp(dir=paths.TMP)
try:
pk12pwfile = os.path.join(tdir, 'pk12pwfile')
password = ipautil.ipa_generate_password()
with open(pk12pwfile, 'w') as f:
f.write(password)
pk12file = os.path.join(tdir, 'pk12file')
nssdb = NSSDatabase(self.nssdb_path)
nssdb.run_pk12util([
"-o", pk12file,
"-n", self.nickname,
"-k", self.nssdb_pwdfile,
"-w", pk12pwfile,
])
with open(pk12file, 'rb') as f:
data = f.read()
finally:
shutil.rmtree(tdir)
return json_encode({'export password': password,
'pkcs12 data': b64encode(data).decode('ascii')})
def import_key(args, tmpdir):
"""Import key and certificate from a PKCS#12 file to a NSS DB.
"""
data = json.load(args.importfile)
password = data['export password']
p12data = base64.b64decode(data['pkcs12 data'])
pk12pwfile = os.path.join(tmpdir, 'passwd')
with open(pk12pwfile, 'w') as f:
f.write(password)
pk12file = os.path.join(tmpdir, 'import.p12')
with open(pk12file, 'wb') as f:
f.write(p12data)
nssdb = NSSDatabase(args.nssdb_path)
nssdb.run_pk12util([
"-i", pk12file,
"-n", args.nickname,
"-k", args.nssdb_pwdfile,
"-w", pk12pwfile,
])
def __init__(self, realm, nssdir, fstore=None,
host_name=None, subject_base=None, ca_subject=None,
user=None, group=None, mode=None, create=False,
dbtype='auto'):
self.nssdb = NSSDatabase(nssdir, dbtype=dbtype)
self.realm = realm
self.noise_fname = os.path.join(self.secdir, "noise.txt")
self.pk12_fname = os.path.join(self.secdir, "cacert.p12")
self.pin_fname = os.path.join(self.secdir + "pin.txt")
self.reqdir = None
self.certreq_fname = None
self.certder_fname = None
self.host_name = host_name
self.ca_subject = ca_subject
self.subject_base = subject_base
self.cacert_name = get_ca_nickname(self.realm)
self.user = user
self.group = group
self.mode = mode
self.uid = 0
self.gid = 0
if not create:
if os.path.isdir(self.secdir):
# We are going to set the owner of all of the cert
# files to the owner of the containing directory
# instead of that of the process. This works when
# this is called by root for a daemon that runs as
# a normal user
mode = os.stat(self.secdir)
self.uid = mode[stat.ST_UID]
self.gid = mode[stat.ST_GID]
else:
if user is not None:
pu = pwd.getpwnam(user)
self.uid = pu.pw_uid
self.gid = pu.pw_gid
if group is not None:
self.gid = grp.getgrnam(group).gr_gid
self.create_certdbs()
if fstore:
self.fstore = fstore
else:
self.fstore = sysrestore.FileStore(paths.SYSRESTORE)
def __init__(self, realm, nssdir=NSS_DIR, fstore=None, host_name=None, subject_base=None):
self.nssdb = NSSDatabase(nssdir)
self.secdir = nssdir
self.realm = realm
self.noise_fname = self.secdir + "/noise.txt"
self.passwd_fname = self.secdir + "/pwdfile.txt"
self.certdb_fname = self.secdir + "/cert8.db"
self.keydb_fname = self.secdir + "/key3.db"
self.secmod_fname = self.secdir + "/secmod.db"
self.cacert_fname = self.secdir + "/cacert.asc"
self.pk12_fname = self.secdir + "/cacert.p12"
self.pin_fname = self.secdir + "/pin.txt"
self.pwd_conf = paths.HTTPD_PASSWORD_CONF
self.reqdir = None
self.certreq_fname = None
self.certder_fname = None
self.host_name = host_name
self.subject_base = subject_base
try:
self.cwd = os.getcwd()
except OSError as e:
raise RuntimeError("Unable to determine the current directory: %s" % str(e))
if not subject_base:
self.subject_base = DN(('O', 'IPA'))
self.cacert_name = get_ca_nickname(self.realm)
self.valid_months = "120"
self.keysize = "1024"
# We are going to set the owner of all of the cert
# files to the owner of the containing directory
# instead of that of the process. This works when
# this is called by root for a daemon that runs as
# a normal user
mode = os.stat(self.secdir)
self.uid = mode[stat.ST_UID]
self.gid = mode[stat.ST_GID]
if fstore:
self.fstore = fstore
else:
self.fstore = sysrestore.FileStore(paths.SYSRESTORE)
def execute(self, **options):
ra_nick = 'ipaCert'
ca_enabled = self.api.Command.ca_is_enabled()['result']
if not ca_enabled:
return False, []
certdb = NSSDatabase(nssdir=paths.HTTPD_ALIAS_DIR)
if not certdb.has_nickname(ra_nick):
# Nothign to do
return False, []
elif os.path.exists(paths.RA_AGENT_PEM):
# even though the certificate file exists, we will overwrite it
# as it's probabably something wrong anyway
self.log.warning(
"A certificate with the nickname 'ipaCert' exists in "
"the old '{}' NSS database as well as in the new "
"PEM file '{}'"
.format(paths.HTTPD_ALIAS_DIR, paths.RA_AGENT_PEM))
_fd, p12file = tempfile.mkstemp(dir=certdb.secdir)
# no password is necessary as we will be saving it in clear anyway
certdb.export_pkcs12(ra_nick, p12file, pkcs12_passwd='')
# stop tracking the old cert and remove it
certmonger.stop_tracking(paths.HTTPD_ALIAS_DIR, nickname=ra_nick)
certdb.delete_cert(ra_nick)
if os.path.exists(paths.OLD_KRA_AGENT_PEM):
os.remove(paths.OLD_KRA_AGENT_PEM)
# get the private key and certificate from the file and start
# tracking it in certmonger
ca = cainstance.CAInstance()
ca.import_ra_cert(p12file)
os.remove(p12file)
return False, []
class BaseCert(XMLRPC_test):
host_fqdn = u'ipatestcert.%s' % api.env.domain
service_princ = u'test/%s@%s' % (host_fqdn, api.env.realm)
@classmethod
def setup_class(cls):
super(BaseCert, cls).setup_class()
if 'cert_request' not in api.Command:
raise unittest.SkipTest('cert_request not registered')
if 'cert_show' not in api.Command:
raise unittest.SkipTest('cert_show not registered')
is_db_configured()
def setup(self):
self.nssdb = NSSDatabase()
secdir = self.nssdb.secdir
self.reqfile = os.path.join(secdir, "test.csr")
self.certfile = os.path.join(secdir, "cert.crt")
# Create our temporary NSS database
self.nssdb.create_db()
self.subject = DN(('CN', self.host_fqdn), subject_base())
def teardown(self):
self.nssdb.close() # remove tempdir
def generateCSR(self, subject):
self.nssdb.run_certutil([
"-R", "-s", subject,
"-o", self.reqfile,
"-z", paths.GROUP,
"-a",
])
with open(self.reqfile, "rb") as f:
return f.read().decode('ascii')
class CertDB(object):
"""An IPA-server-specific wrapper around NSS
This class knows IPA-specific details such as nssdir location, or the
CA cert name.
``subject_base``
Realm subject base DN. This argument is required when creating
server or object signing certs.
``ca_subject``
IPA CA subject DN. This argument is required when importing
CA certificates into the certificate database.
"""
# TODO: Remove all selfsign code
def __init__(self, realm, nssdir, fstore=None,
host_name=None, subject_base=None, ca_subject=None,
user=None, group=None, mode=None, create=False):
self.nssdb = NSSDatabase(nssdir)
self.secdir = nssdir
self.realm = realm
self.noise_fname = self.secdir + "/noise.txt"
self.certdb_fname = self.secdir + "/cert8.db"
self.keydb_fname = self.secdir + "/key3.db"
self.secmod_fname = self.secdir + "/secmod.db"
self.pk12_fname = self.secdir + "/cacert.p12"
self.pin_fname = self.secdir + "/pin.txt"
self.reqdir = None
self.certreq_fname = None
self.certder_fname = None
self.host_name = host_name
self.ca_subject = ca_subject
self.subject_base = subject_base
try:
self.cwd = os.path.abspath(os.getcwd())
except OSError as e:
raise RuntimeError(
"Unable to determine the current directory: %s" % str(e))
self.cacert_name = get_ca_nickname(self.realm)
self.user = user
self.group = group
self.mode = mode
self.uid = 0
self.gid = 0
if not create:
if os.path.isdir(self.secdir):
# We are going to set the owner of all of the cert
# files to the owner of the containing directory
# instead of that of the process. This works when
# this is called by root for a daemon that runs as
# a normal user
mode = os.stat(self.secdir)
self.uid = mode[stat.ST_UID]
self.gid = mode[stat.ST_GID]
else:
if user is not None:
pu = pwd.getpwnam(user)
self.uid = pu.pw_uid
self.gid = pu.pw_gid
if group is not None:
self.gid = grp.getgrnam(group).gr_gid
self.create_certdbs()
if fstore:
self.fstore = fstore
else:
self.fstore = sysrestore.FileStore(paths.SYSRESTORE)
ca_subject = ipautil.dn_attribute_property('_ca_subject')
subject_base = ipautil.dn_attribute_property('_subject_base')
@property
def passwd_fname(self):
return self.nssdb.pwd_file
def exists(self):
"""
Checks whether all NSS database files + our pwd_file exist
"""
db_files = (
self.secdir,
self.certdb_fname,
self.keydb_fname,
self.secmod_fname,
self.nssdb.pwd_file,
)
for f in db_files:
if not os.path.exists(f):
return False
return True
def __del__(self):
if self.reqdir is not None:
shutil.rmtree(self.reqdir, ignore_errors=True)
self.reqdir = None
self.nssdb.close()
try:
os.chdir(self.cwd)
except OSError:
pass
def setup_cert_request(self):
"""
Create a temporary directory to store certificate requests and
certificates. This should be called before requesting certificates.
This is set outside of __init__ to avoid creating a temporary
directory every time we open a cert DB.
"""
if self.reqdir is not None:
return
self.reqdir = tempfile.mkdtemp('', 'ipa-', paths.VAR_LIB_IPA)
self.certreq_fname = self.reqdir + "/tmpcertreq"
self.certder_fname = self.reqdir + "/tmpcert.der"
# When certutil makes a request it creates a file in the cwd, make
# sure we are in a unique place when this happens
os.chdir(self.reqdir)
def set_perms(self, fname, write=False):
perms = stat.S_IRUSR
if write:
perms |= stat.S_IWUSR
if hasattr(fname, 'fileno'):
os.fchown(fname.fileno(), self.uid, self.gid)
os.fchmod(fname.fileno(), perms)
else:
os.chown(fname, self.uid, self.gid)
os.chmod(fname, perms)
def run_certutil(self, args, stdin=None, **kwargs):
return self.nssdb.run_certutil(args, stdin, **kwargs)
def run_signtool(self, args, stdin=None):
with open(self.passwd_fname, "r") as f:
password = f.readline()
new_args = [paths.SIGNTOOL, "-d", self.secdir, "-p", password]
new_args = new_args + args
ipautil.run(new_args, stdin)
def create_noise_file(self):
if ipautil.file_exists(self.noise_fname):
os.remove(self.noise_fname)
with open(self.noise_fname, "w") as f:
self.set_perms(f)
f.write(ipautil.ipa_generate_password())
def create_passwd_file(self, passwd=None):
ipautil.backup_file(self.passwd_fname)
with open(self.passwd_fname, "w") as f:
self.set_perms(f)
if passwd is not None:
f.write("%s\n" % passwd)
else:
f.write(ipautil.ipa_generate_password())
def create_certdbs(self):
self.nssdb.create_db(user=self.user, group=self.group, mode=self.mode,
backup=True)
self.set_perms(self.passwd_fname, write=True)
def restore(self):
self.nssdb.restore()
def list_certs(self):
"""
Return a tuple of tuples containing (nickname, trust)
"""
return self.nssdb.list_certs()
def has_nickname(self, nickname):
"""
Returns True if nickname exists in the certdb, False otherwise.
This could also be done directly with:
certutil -L -d -n <nickname> ...
"""
certs = self.list_certs()
for cert in certs:
if nickname == cert[0]:
return True
return False
def export_ca_cert(self, nickname, create_pkcs12=False):
"""create_pkcs12 tells us whether we should create a PKCS#12 file
of the CA or not. If we are running on a replica then we won't
have the private key to make a PKCS#12 file so we don't need to
do that step."""
cacert_fname = paths.IPA_CA_CRT
# export the CA cert for use with other apps
ipautil.backup_file(cacert_fname)
root_nicknames = self.find_root_cert(nickname)[:-1]
with open(cacert_fname, "w") as f:
os.fchmod(f.fileno(), stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH)
for root in root_nicknames:
result = self.run_certutil(["-L", "-n", root, "-a"],
capture_output=True)
f.write(result.output)
if create_pkcs12:
ipautil.backup_file(self.pk12_fname)
ipautil.run([paths.PK12UTIL, "-d", self.secdir,
"-o", self.pk12_fname,
"-n", self.cacert_name,
"-w", self.passwd_fname,
"-k", self.passwd_fname])
self.set_perms(self.pk12_fname)
def load_cacert(self, cacert_fname, trust_flags):
"""
Load all the certificates from a given file. It is assumed that
this file creates CA certificates.
"""
with open(cacert_fname) as f:
certs = f.read()
st = 0
while True:
try:
(cert, st) = find_cert_from_txt(certs, st)
_rdn, subject_dn = get_cert_nickname(cert)
if subject_dn == self.ca_subject:
nick = get_ca_nickname(self.realm)
else:
nick = str(subject_dn)
self.nssdb.add_cert(cert, nick, trust_flags, pem=True)
except RuntimeError:
break
def get_cert_from_db(self, nickname, pem=True):
"""
Retrieve a certificate from the current NSS database for nickname.
pem controls whether the value returned PEM or DER-encoded. The
default is the data straight from certutil -a.
"""
try:
args = ["-L", "-n", nickname, "-a"]
result = self.run_certutil(args, capture_output=True)
cert = result.output
if pem:
return cert
else:
cert, _start = find_cert_from_txt(cert, start=0)
cert = x509.strip_header(cert)
dercert = base64.b64decode(cert)
return dercert
except ipautil.CalledProcessError:
return ''
def track_server_cert(self, nickname, principal, password_file=None, command=None):
"""
Tell certmonger to track the given certificate nickname.
"""
try:
request_id = certmonger.start_tracking(
self.secdir, nickname=nickname, pinfile=password_file,
post_command=command)
except RuntimeError as e:
root_logger.error("certmonger failed starting to track certificate: %s" % str(e))
return
cert = self.get_cert_from_db(nickname)
cert_obj = x509.load_certificate(cert)
subject = str(DN(cert_obj.subject))
certmonger.add_principal(request_id, principal)
certmonger.add_subject(request_id, subject)
def untrack_server_cert(self, nickname):
"""
Tell certmonger to stop tracking the given certificate nickname.
"""
try:
certmonger.stop_tracking(self.secdir, nickname=nickname)
except RuntimeError as e:
root_logger.error("certmonger failed to stop tracking certificate: %s" % str(e))
def create_server_cert(self, nickname, hostname, subject=None):
"""
If we are using a dogtag CA then other_certdb contains the RA agent key
that will issue our cert.
You can override the certificate Subject by specifying a subject.
Returns a certificate in DER format.
"""
if subject is None:
subject=DN(('CN', hostname), self.subject_base)
self.request_cert(subject, san_dnsnames=[hostname])
try:
self.issue_server_cert(self.certreq_fname, self.certder_fname)
self.import_cert(self.certder_fname, nickname)
with open(self.certder_fname, "r") as f:
dercert = f.read()
finally:
for fname in (self.certreq_fname, self.certder_fname):
try:
os.unlink(fname)
except OSError:
pass
return dercert
def request_cert(
self, subject, certtype="rsa", keysize="2048",
san_dnsnames=None):
assert isinstance(subject, DN)
self.create_noise_file()
self.setup_cert_request()
args = ["-R", "-s", str(subject),
"-o", self.certreq_fname,
"-k", certtype,
"-g", keysize,
"-z", self.noise_fname,
"-f", self.passwd_fname,
"-a"]
if san_dnsnames is not None and len(san_dnsnames) > 0:
args += ['-8', ','.join(san_dnsnames)]
result = self.run_certutil(args,
capture_output=True, capture_error=True)
os.remove(self.noise_fname)
return (result.output, result.error_output)
def issue_server_cert(self, certreq_fname, cert_fname):
self.setup_cert_request()
if self.host_name is None:
raise RuntimeError("CA Host is not set.")
with open(certreq_fname, "r") as f:
csr = f.read()
# We just want the CSR bits, make sure there is nothing else
csr = pkcs10.strip_header(csr)
params = {'profileId': dogtag.DEFAULT_PROFILE,
'cert_request_type': 'pkcs10',
'requestor_name': 'IPA Installer',
'cert_request': csr,
'xmlOutput': 'true'}
# Send the request to the CA
result = dogtag.https_request(
self.host_name, 8443,
url="/ca/ee/ca/profileSubmitSSLClient",
cafile=api.env.tls_ca_cert,
client_certfile=paths.RA_AGENT_PEM,
client_keyfile=paths.RA_AGENT_KEY,
**params)
http_status, _http_headers, http_body = result
root_logger.debug("CA answer: %s", http_body)
if http_status != 200:
raise CertificateOperationError(
error=_('Unable to communicate with CMS (status %d)') % http_status)
# The result is an XML blob. Pull the certificate out of that
doc = xml.dom.minidom.parseString(http_body)
item_node = doc.getElementsByTagName("b64")
try:
try:
cert = item_node[0].childNodes[0].data
except IndexError:
raise RuntimeError("Certificate issuance failed")
finally:
doc.unlink()
# base64-decode the result for uniformity
cert = base64.b64decode(cert)
# Write the certificate to a file. It will be imported in a later
# step. This file will be read later to be imported.
with open(cert_fname, "w") as f:
f.write(cert)
def issue_signing_cert(self, certreq_fname, cert_fname):
self.setup_cert_request()
if self.host_name is None:
raise RuntimeError("CA Host is not set.")
with open(certreq_fname, "r") as f:
csr = f.read()
# We just want the CSR bits, make sure there is no thing else
csr = pkcs10.strip_header(csr)
params = {'profileId': 'caJarSigningCert',
'cert_request_type': 'pkcs10',
'requestor_name': 'IPA Installer',
'cert_request': csr,
'xmlOutput': 'true'}
# Send the request to the CA
result = dogtag.https_request(
self.host_name, 8443,
url="/ca/ee/ca/profileSubmitSSLClient",
cafile=api.env.tls_ca_cert,
client_certfile=paths.RA_AGENT_PEM,
client_keyfile=paths.RA_AGENT_KEY,
**params)
http_status, _http_headers, http_body = result
if http_status != 200:
raise RuntimeError("Unable to submit cert request")
# The result is an XML blob. Pull the certificate out of that
doc = xml.dom.minidom.parseString(http_body)
item_node = doc.getElementsByTagName("b64")
cert = item_node[0].childNodes[0].data
doc.unlink()
# base64-decode the cert for uniformity
cert = base64.b64decode(cert)
# Write the certificate to a file. It will be imported in a later
# step. This file will be read later to be imported.
with open(cert_fname, "w") as f:
f.write(cert)
def add_cert(self, cert, nick, flags, pem=False):
self.nssdb.add_cert(cert, nick, flags, pem)
def import_cert(self, cert_fname, nickname):
"""
Load a certificate from a PEM file and add minimal trust.
"""
args = ["-A", "-n", nickname,
"-t", "u,u,u",
"-i", cert_fname,
"-f", self.passwd_fname]
self.run_certutil(args)
def delete_cert(self, nickname):
self.nssdb.delete_cert(nickname)
def create_pin_file(self):
"""
This is the format of Directory Server pin files.
"""
ipautil.backup_file(self.pin_fname)
with open(self.pin_fname, "w") as pinfile:
self.set_perms(pinfile)
pinfile.write("Internal (Software) Token:")
with open(self.passwd_fname) as pwdfile:
pinfile.write(pwdfile.read())
def find_root_cert(self, nickname):
"""
Given a nickname, return a list of the certificates that make up
the trust chain.
"""
root_nicknames = self.nssdb.get_trust_chain(nickname)
return root_nicknames
def trust_root_cert(self, root_nickname, trust_flags):
if root_nickname is None:
root_logger.debug("Unable to identify root certificate to trust. Continuing but things are likely to fail.")
return
try:
self.nssdb.trust_root_cert(root_nickname, trust_flags)
except RuntimeError:
pass
def find_server_certs(self):
return self.nssdb.find_server_certs()
def import_pkcs12(self, pkcs12_fname, pkcs12_passwd=None):
return self.nssdb.import_pkcs12(pkcs12_fname,
pkcs12_passwd=pkcs12_passwd)
def export_pkcs12(self, pkcs12_fname, pkcs12_pwd_fname, nickname=None):
if nickname is None:
nickname = get_ca_nickname(api.env.realm)
ipautil.run([paths.PK12UTIL, "-d", self.secdir,
"-o", pkcs12_fname,
"-n", nickname,
"-k", self.passwd_fname,
"-w", pkcs12_pwd_fname])
def create_from_cacert(self):
cacert_fname = paths.IPA_CA_CRT
if ipautil.file_exists(self.certdb_fname):
# We already have a cert db, see if it is for the same CA.
# If it is we leave things as they are.
with open(cacert_fname, "r") as f:
newca = f.read()
newca, _st = find_cert_from_txt(newca)
cacert = self.get_cert_from_db(self.cacert_name)
if cacert != '':
cacert, _st = find_cert_from_txt(cacert)
if newca == cacert:
return
# The CA certificates are different or something went wrong. Start with
# a new certificate database.
self.create_passwd_file()
self.create_certdbs()
self.load_cacert(cacert_fname, IPA_CA_TRUST_FLAGS)
def create_from_pkcs12(self, pkcs12_fname, pkcs12_passwd,
ca_file, trust_flags):
"""Create a new NSS database using the certificates in a PKCS#12 file.
pkcs12_fname: the filename of the PKCS#12 file
pkcs12_pwd_fname: the file containing the pin for the PKCS#12 file
nickname: the nickname/friendly-name of the cert we are loading
The global CA may be added as well in case it wasn't included in the
PKCS#12 file. Extra certs won't hurt in any case.
The global CA may be specified in ca_file, as a PEM filename.
"""
self.create_noise_file()
self.create_passwd_file()
self.create_certdbs()
self.init_from_pkcs12(
pkcs12_fname,
pkcs12_passwd,
ca_file=ca_file,
trust_flags=trust_flags)
def init_from_pkcs12(self, pkcs12_fname, pkcs12_passwd,
ca_file, trust_flags):
self.import_pkcs12(pkcs12_fname, pkcs12_passwd)
server_certs = self.find_server_certs()
if len(server_certs) == 0:
raise RuntimeError("Could not find a suitable server cert in import in %s" % pkcs12_fname)
if ca_file:
try:
with open(ca_file) as fd:
certs = fd.read()
except IOError as e:
raise RuntimeError(
"Failed to open %s: %s" % (ca_file, e.strerror))
st = 0
num = 1
while True:
try:
cert, st = find_cert_from_txt(certs, st)
except RuntimeError:
break
self.add_cert(cert, 'CA %s' % num, EMPTY_TRUST_FLAGS, pem=True)
num += 1
# We only handle one server cert
nickname = server_certs[0][0]
ca_names = self.find_root_cert(nickname)[:-1]
if len(ca_names) == 0:
raise RuntimeError("Could not find a CA cert in %s" % pkcs12_fname)
self.cacert_name = ca_names[-1]
self.trust_root_cert(self.cacert_name, trust_flags)
self.export_ca_cert(nickname, False)
def export_pem_cert(self, nickname, location):
return self.nssdb.export_pem_cert(nickname, location)
def request_service_cert(self, nickname, principal, host):
certmonger.request_and_wait_for_cert(certpath=self.secdir,
nickname=nickname,
principal=principal,
subject=host,
passwd_fname=self.passwd_fname)
class CertDB(object):
"""An IPA-server-specific wrapper around NSS
This class knows IPA-specific details such as nssdir location, or the
CA cert name.
"""
# TODO: Remove all selfsign code
def __init__(self, realm, nssdir=NSS_DIR, fstore=None, host_name=None, subject_base=None):
self.nssdb = NSSDatabase(nssdir)
self.secdir = nssdir
self.realm = realm
self.noise_fname = self.secdir + "/noise.txt"
self.passwd_fname = self.secdir + "/pwdfile.txt"
self.certdb_fname = self.secdir + "/cert8.db"
self.keydb_fname = self.secdir + "/key3.db"
self.secmod_fname = self.secdir + "/secmod.db"
self.cacert_fname = self.secdir + "/cacert.asc"
self.pk12_fname = self.secdir + "/cacert.p12"
self.pin_fname = self.secdir + "/pin.txt"
self.pwd_conf = paths.HTTPD_PASSWORD_CONF
self.reqdir = None
self.certreq_fname = None
self.certder_fname = None
self.host_name = host_name
self.subject_base = subject_base
try:
self.cwd = os.getcwd()
except OSError as e:
raise RuntimeError("Unable to determine the current directory: %s" % str(e))
if not subject_base:
self.subject_base = DN(('O', 'IPA'))
self.cacert_name = get_ca_nickname(self.realm)
self.valid_months = "120"
self.keysize = "1024"
# We are going to set the owner of all of the cert
# files to the owner of the containing directory
# instead of that of the process. This works when
# this is called by root for a daemon that runs as
# a normal user
mode = os.stat(self.secdir)
self.uid = mode[stat.ST_UID]
self.gid = mode[stat.ST_GID]
if fstore:
self.fstore = fstore
else:
self.fstore = sysrestore.FileStore(paths.SYSRESTORE)
subject_base = ipautil.dn_attribute_property('_subject_base')
def __del__(self):
if self.reqdir is not None:
shutil.rmtree(self.reqdir, ignore_errors=True)
try:
os.chdir(self.cwd)
except:
pass
def setup_cert_request(self):
"""
Create a temporary directory to store certificate requests and
certificates. This should be called before requesting certificates.
This is set outside of __init__ to avoid creating a temporary
directory every time we open a cert DB.
"""
if self.reqdir is not None:
return
self.reqdir = tempfile.mkdtemp('', 'ipa-', paths.VAR_LIB_IPA)
self.certreq_fname = self.reqdir + "/tmpcertreq"
self.certder_fname = self.reqdir + "/tmpcert.der"
# When certutil makes a request it creates a file in the cwd, make
# sure we are in a unique place when this happens
os.chdir(self.reqdir)
def set_perms(self, fname, write=False, uid=None):
if uid:
pent = pwd.getpwnam(uid)
os.chown(fname, pent.pw_uid, pent.pw_gid)
else:
os.chown(fname, self.uid, self.gid)
perms = stat.S_IRUSR
if write:
perms |= stat.S_IWUSR
os.chmod(fname, perms)
def gen_password(self):
return sha1(ipautil.ipa_generate_password()).hexdigest()
def run_certutil(self, args, stdin=None):
return self.nssdb.run_certutil(args, stdin)
def run_signtool(self, args, stdin=None):
with open(self.passwd_fname, "r") as f:
password = f.readline()
new_args = [paths.SIGNTOOL, "-d", self.secdir, "-p", password]
new_args = new_args + args
ipautil.run(new_args, stdin)
def create_noise_file(self):
if ipautil.file_exists(self.noise_fname):
os.remove(self.noise_fname)
f = open(self.noise_fname, "w")
f.write(self.gen_password())
self.set_perms(self.noise_fname)
def create_passwd_file(self, passwd=None):
ipautil.backup_file(self.passwd_fname)
f = open(self.passwd_fname, "w")
if passwd is not None:
f.write("%s\n" % passwd)
else:
f.write(self.gen_password())
f.close()
self.set_perms(self.passwd_fname)
def create_certdbs(self):
ipautil.backup_file(self.certdb_fname)
ipautil.backup_file(self.keydb_fname)
ipautil.backup_file(self.secmod_fname)
self.nssdb.create_db(self.passwd_fname)
self.set_perms(self.passwd_fname, write=True)
def list_certs(self):
"""
Return a tuple of tuples containing (nickname, trust)
"""
return self.nssdb.list_certs()
def has_nickname(self, nickname):
"""
Returns True if nickname exists in the certdb, False otherwise.
This could also be done directly with:
certutil -L -d -n <nickname> ...
"""
certs = self.list_certs()
for cert in certs:
if nickname == cert[0]:
return True
return False
def export_ca_cert(self, nickname, create_pkcs12=False):
"""create_pkcs12 tells us whether we should create a PKCS#12 file
of the CA or not. If we are running on a replica then we won't
have the private key to make a PKCS#12 file so we don't need to
do that step."""
# export the CA cert for use with other apps
ipautil.backup_file(self.cacert_fname)
root_nicknames = self.find_root_cert(nickname)[:-1]
fd = open(self.cacert_fname, "w")
for root in root_nicknames:
(cert, stderr, returncode) = self.run_certutil(["-L", "-n", root, "-a"])
fd.write(cert)
fd.close()
os.chmod(self.cacert_fname, stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH)
if create_pkcs12:
ipautil.backup_file(self.pk12_fname)
ipautil.run([paths.PK12UTIL, "-d", self.secdir,
"-o", self.pk12_fname,
"-n", self.cacert_name,
"-w", self.passwd_fname,
"-k", self.passwd_fname])
self.set_perms(self.pk12_fname)
def load_cacert(self, cacert_fname, trust_flags):
"""
Load all the certificates from a given file. It is assumed that
this file creates CA certificates.
"""
fd = open(cacert_fname)
certs = fd.read()
fd.close()
ca_dn = DN(('CN','Certificate Authority'), self.subject_base)
st = 0
while True:
try:
(cert, st) = find_cert_from_txt(certs, st)
(rdn, subject_dn) = get_cert_nickname(cert)
if subject_dn == ca_dn:
nick = get_ca_nickname(self.realm)
else:
nick = str(subject_dn)
self.nssdb.add_cert(cert, nick, trust_flags, pem=True)
except RuntimeError:
break
def get_cert_from_db(self, nickname, pem=True):
"""
Retrieve a certificate from the current NSS database for nickname.
pem controls whether the value returned PEM or DER-encoded. The
default is the data straight from certutil -a.
"""
try:
args = ["-L", "-n", nickname, "-a"]
(cert, err, returncode) = self.run_certutil(args)
if pem:
return cert
else:
(cert, start) = find_cert_from_txt(cert, start=0)
cert = x509.strip_header(cert)
dercert = base64.b64decode(cert)
return dercert
except ipautil.CalledProcessError:
return ''
def track_server_cert(self, nickname, principal, password_file=None, command=None):
"""
Tell certmonger to track the given certificate nickname.
If command is not a full path then it is prefixed with
/usr/lib[64]/ipa/certmonger.
"""
if command is not None and not os.path.isabs(command):
if sys.maxsize > 2**32:
libpath = 'lib64'
else:
libpath = 'lib'
command = paths.CERTMONGER_COMMAND_TEMPLATE % (libpath, command)
try:
request_id = certmonger.start_tracking(nickname, self.secdir, password_file, command)
except RuntimeError as e:
root_logger.error("certmonger failed starting to track certificate: %s" % str(e))
return
cert = self.get_cert_from_db(nickname)
nsscert = x509.load_certificate(cert, dbdir=self.secdir)
subject = str(nsscert.subject)
certmonger.add_principal(request_id, principal)
certmonger.add_subject(request_id, subject)
def untrack_server_cert(self, nickname):
"""
Tell certmonger to stop tracking the given certificate nickname.
"""
try:
certmonger.stop_tracking(self.secdir, nickname=nickname)
except RuntimeError as e:
root_logger.error("certmonger failed to stop tracking certificate: %s" % str(e))
def create_server_cert(self, nickname, hostname, other_certdb=None, subject=None):
"""
If we are using a dogtag CA then other_certdb contains the RA agent key
that will issue our cert.
You can override the certificate Subject by specifying a subject.
Returns a certificate in DER format.
"""
cdb = other_certdb
if not cdb:
cdb = self
if subject is None:
subject=DN(('CN', hostname), self.subject_base)
self.request_cert(subject)
cdb.issue_server_cert(self.certreq_fname, self.certder_fname)
self.import_cert(self.certder_fname, nickname)
fd = open(self.certder_fname, "r")
dercert = fd.read()
fd.close()
os.unlink(self.certreq_fname)
os.unlink(self.certder_fname)
return dercert
def create_signing_cert(self, nickname, hostname, other_certdb=None, subject=None):
cdb = other_certdb
if not cdb:
cdb = self
if subject is None:
subject=DN(('CN', hostname), self.subject_base)
self.request_cert(subject)
cdb.issue_signing_cert(self.certreq_fname, self.certder_fname)
self.import_cert(self.certder_fname, nickname)
os.unlink(self.certreq_fname)
os.unlink(self.certder_fname)
def request_cert(self, subject, certtype="rsa", keysize="2048"):
assert isinstance(subject, DN)
self.create_noise_file()
self.setup_cert_request()
args = ["-R", "-s", str(subject),
"-o", self.certreq_fname,
"-k", certtype,
"-g", keysize,
"-z", self.noise_fname,
"-f", self.passwd_fname,
"-a"]
(stdout, stderr, returncode) = self.run_certutil(args)
os.remove(self.noise_fname)
return (stdout, stderr)
def issue_server_cert(self, certreq_fname, cert_fname):
self.setup_cert_request()
if self.host_name is None:
raise RuntimeError("CA Host is not set.")
f = open(certreq_fname, "r")
csr = f.readlines()
f.close()
csr = "".join(csr)
# We just want the CSR bits, make sure there is nothing else
csr = pkcs10.strip_header(csr)
params = {'profileId': dogtag.DEFAULT_PROFILE,
'cert_request_type': 'pkcs10',
'requestor_name': 'IPA Installer',
'cert_request': csr,
'xmlOutput': 'true'}
# Send the request to the CA
f = open(self.passwd_fname, "r")
password = f.readline()
f.close()
result = dogtag.https_request(
self.host_name,
api.env.ca_ee_install_port or
dogtag.configured_constants().EE_SECURE_PORT,
"/ca/ee/ca/profileSubmitSSLClient",
self.secdir, password, "ipaCert", **params)
http_status, http_reason_phrase, http_headers, http_body = result
if http_status != 200:
raise CertificateOperationError(
error=_('Unable to communicate with CMS (%s)') %
http_reason_phrase)
# The result is an XML blob. Pull the certificate out of that
doc = xml.dom.minidom.parseString(http_body)
item_node = doc.getElementsByTagName("b64")
try:
try:
cert = item_node[0].childNodes[0].data
except IndexError:
raise RuntimeError("Certificate issuance failed")
finally:
doc.unlink()
# base64-decode the result for uniformity
cert = base64.b64decode(cert)
# Write the certificate to a file. It will be imported in a later
# step. This file will be read later to be imported.
f = open(cert_fname, "w")
f.write(cert)
f.close()
def issue_signing_cert(self, certreq_fname, cert_fname):
self.setup_cert_request()
if self.host_name is None:
raise RuntimeError("CA Host is not set.")
f = open(certreq_fname, "r")
csr = f.readlines()
f.close()
csr = "".join(csr)
# We just want the CSR bits, make sure there is no thing else
csr = pkcs10.strip_header(csr)
params = {'profileId': 'caJarSigningCert',
'cert_request_type': 'pkcs10',
'requestor_name': 'IPA Installer',
'cert_request': csr,
'xmlOutput': 'true'}
# Send the request to the CA
f = open(self.passwd_fname, "r")
password = f.readline()
f.close()
result = dogtag.https_request(
self.host_name,
api.env.ca_ee_install_port or
dogtag.configured_constants().EE_SECURE_PORT,
"/ca/ee/ca/profileSubmitSSLClient",
self.secdir, password, "ipaCert", **params)
http_status, http_reason_phrase, http_headers, http_body = result
if http_status != 200:
raise RuntimeError("Unable to submit cert request")
# The result is an XML blob. Pull the certificate out of that
doc = xml.dom.minidom.parseString(http_body)
item_node = doc.getElementsByTagName("b64")
cert = item_node[0].childNodes[0].data
doc.unlink()
# base64-decode the cert for uniformity
cert = base64.b64decode(cert)
# Write the certificate to a file. It will be imported in a later
# step. This file will be read later to be imported.
f = open(cert_fname, "w")
f.write(cert)
f.close()
def add_cert(self, cert, nick, flags, pem=False):
self.nssdb.add_cert(cert, nick, flags, pem)
def import_cert(self, cert_fname, nickname):
"""
Load a certificate from a PEM file and add minimal trust.
"""
args = ["-A", "-n", nickname,
"-t", "u,u,u",
"-i", cert_fname,
"-f", self.passwd_fname]
self.run_certutil(args)
def delete_cert(self, nickname):
self.nssdb.delete_cert(nickname)
def create_pin_file(self):
"""
This is the format of Directory Server pin files.
"""
ipautil.backup_file(self.pin_fname)
f = open(self.pin_fname, "w")
f.write("Internal (Software) Token:")
pwdfile = open(self.passwd_fname)
f.write(pwdfile.read())
f.close()
pwdfile.close()
self.set_perms(self.pin_fname)
def create_password_conf(self):
"""
This is the format of mod_nss pin files.
"""
ipautil.backup_file(self.pwd_conf)
f = open(self.pwd_conf, "w")
f.write("internal:")
pwdfile = open(self.passwd_fname)
f.write(pwdfile.read())
f.close()
pwdfile.close()
# TODO: replace explicit uid by a platform-specific one
self.set_perms(self.pwd_conf, uid="apache")
def find_root_cert(self, nickname):
"""
Given a nickname, return a list of the certificates that make up
the trust chain.
"""
root_nicknames = self.nssdb.get_trust_chain(nickname)
return root_nicknames
def trust_root_cert(self, root_nickname, trust_flags=None):
if root_nickname is None:
root_logger.debug("Unable to identify root certificate to trust. Continuing but things are likely to fail.")
return
try:
self.nssdb.trust_root_cert(root_nickname, trust_flags)
except RuntimeError:
pass
def find_server_certs(self):
return self.nssdb.find_server_certs()
def import_pkcs12(self, pkcs12_fname, pkcs12_passwd=None):
return self.nssdb.import_pkcs12(pkcs12_fname, self.passwd_fname,
pkcs12_passwd=pkcs12_passwd)
def export_pkcs12(self, pkcs12_fname, pkcs12_pwd_fname, nickname=None):
if nickname is None:
nickname = get_ca_nickname(api.env.realm)
ipautil.run([paths.PK12UTIL, "-d", self.secdir,
"-o", pkcs12_fname,
"-n", nickname,
"-k", self.passwd_fname,
"-w", pkcs12_pwd_fname])
def export_pem_p12(self, pkcs12_fname, pkcs12_pwd_fname,
nickname, pem_fname):
ipautil.run([paths.OPENSSL, "pkcs12",
"-export", "-name", nickname,
"-in", pem_fname, "-out", pkcs12_fname,
"-passout", "file:" + pkcs12_pwd_fname])
def create_from_cacert(self, cacert_fname, passwd=None):
if ipautil.file_exists(self.certdb_fname):
# We already have a cert db, see if it is for the same CA.
# If it is we leave things as they are.
f = open(cacert_fname, "r")
newca = f.readlines()
f.close()
newca = "".join(newca)
(newca, st) = find_cert_from_txt(newca)
cacert = self.get_cert_from_db(self.cacert_name)
if cacert != '':
(cacert, st) = find_cert_from_txt(cacert)
if newca == cacert:
return
# The CA certificates are different or something went wrong. Start with
# a new certificate database.
self.create_passwd_file(passwd)
self.create_certdbs()
self.load_cacert(cacert_fname, 'CT,C,C')
def create_from_pkcs12(self, pkcs12_fname, pkcs12_passwd, passwd=None,
ca_file=None, trust_flags=None):
"""Create a new NSS database using the certificates in a PKCS#12 file.
pkcs12_fname: the filename of the PKCS#12 file
pkcs12_pwd_fname: the file containing the pin for the PKCS#12 file
nickname: the nickname/friendly-name of the cert we are loading
passwd: The password to use for the new NSS database we are creating
The global CA may be added as well in case it wasn't included in the
PKCS#12 file. Extra certs won't hurt in any case.
The global CA may be specified in ca_file, as a PEM filename.
"""
self.create_noise_file()
self.create_passwd_file(passwd)
self.create_certdbs()
self.import_pkcs12(pkcs12_fname, pkcs12_passwd)
server_certs = self.find_server_certs()
if len(server_certs) == 0:
raise RuntimeError("Could not find a suitable server cert in import in %s" % pkcs12_fname)
if ca_file:
try:
with open(ca_file) as fd:
certs = fd.read()
except IOError as e:
raise RuntimeError(
"Failed to open %s: %s" % (ca_file, e.strerror))
st = 0
num = 1
while True:
try:
cert, st = find_cert_from_txt(certs, st)
except RuntimeError:
break
self.add_cert(cert, 'CA %s' % num, ',,', pem=True)
num += 1
# We only handle one server cert
nickname = server_certs[0][0]
ca_names = self.find_root_cert(nickname)[:-1]
if len(ca_names) == 0:
raise RuntimeError("Could not find a CA cert in %s" % pkcs12_fname)
self.cacert_name = ca_names[-1]
self.trust_root_cert(self.cacert_name, trust_flags)
self.create_pin_file()
self.export_ca_cert(nickname, False)
def install_pem_from_p12(self, p12_fname, p12_passwd, pem_fname):
pwd = ipautil.write_tmp_file(p12_passwd)
ipautil.run([paths.OPENSSL, "pkcs12", "-nodes",
"-in", p12_fname, "-out", pem_fname,
"-passin", "file:" + pwd.name])
def publish_ca_cert(self, location):
shutil.copy(self.cacert_fname, location)
os.chmod(location, 0o444)
def export_pem_cert(self, nickname, location):
return self.nssdb.export_pem_cert(nickname, location)
class CertDB(object):
"""An IPA-server-specific wrapper around NSS
This class knows IPA-specific details such as nssdir location, or the
CA cert name.
"""
# TODO: Remove all selfsign code
def __init__(self,
realm,
nssdir=NSS_DIR,
fstore=None,
host_name=None,
subject_base=None):
self.nssdb = NSSDatabase(nssdir)
self.secdir = nssdir
self.realm = realm
self.noise_fname = self.secdir + "/noise.txt"
self.passwd_fname = self.secdir + "/pwdfile.txt"
self.certdb_fname = self.secdir + "/cert8.db"
self.keydb_fname = self.secdir + "/key3.db"
self.secmod_fname = self.secdir + "/secmod.db"
self.cacert_fname = self.secdir + "/cacert.asc"
self.pk12_fname = self.secdir + "/cacert.p12"
self.pin_fname = self.secdir + "/pin.txt"
self.pwd_conf = paths.HTTPD_PASSWORD_CONF
self.reqdir = None
self.certreq_fname = None
self.certder_fname = None
self.host_name = host_name
self.subject_base = subject_base
try:
self.cwd = os.getcwd()
except OSError as e:
raise RuntimeError(
"Unable to determine the current directory: %s" % str(e))
if not subject_base:
self.subject_base = DN(('O', 'IPA'))
self.cacert_name = get_ca_nickname(self.realm)
self.valid_months = "120"
self.keysize = "1024"
# We are going to set the owner of all of the cert
# files to the owner of the containing directory
# instead of that of the process. This works when
# this is called by root for a daemon that runs as
# a normal user
mode = os.stat(self.secdir)
self.uid = mode[stat.ST_UID]
self.gid = mode[stat.ST_GID]
if fstore:
self.fstore = fstore
else:
self.fstore = sysrestore.FileStore(paths.SYSRESTORE)
subject_base = ipautil.dn_attribute_property('_subject_base')
def __del__(self):
if self.reqdir is not None:
shutil.rmtree(self.reqdir, ignore_errors=True)
try:
os.chdir(self.cwd)
except OSError:
pass
def setup_cert_request(self):
"""
Create a temporary directory to store certificate requests and
certificates. This should be called before requesting certificates.
This is set outside of __init__ to avoid creating a temporary
directory every time we open a cert DB.
"""
if self.reqdir is not None:
return
self.reqdir = tempfile.mkdtemp('', 'ipa-', paths.VAR_LIB_IPA)
self.certreq_fname = self.reqdir + "/tmpcertreq"
self.certder_fname = self.reqdir + "/tmpcert.der"
# When certutil makes a request it creates a file in the cwd, make
# sure we are in a unique place when this happens
os.chdir(self.reqdir)
def set_perms(self, fname, write=False, uid=None):
if uid:
pent = pwd.getpwnam(uid)
os.chown(fname, pent.pw_uid, pent.pw_gid)
else:
os.chown(fname, self.uid, self.gid)
perms = stat.S_IRUSR
if write:
perms |= stat.S_IWUSR
os.chmod(fname, perms)
def gen_password(self):
return sha1(ipautil.ipa_generate_password()).hexdigest()
def run_certutil(self, args, stdin=None, **kwargs):
return self.nssdb.run_certutil(args, stdin, **kwargs)
def run_signtool(self, args, stdin=None):
with open(self.passwd_fname, "r") as f:
password = f.readline()
new_args = [paths.SIGNTOOL, "-d", self.secdir, "-p", password]
new_args = new_args + args
ipautil.run(new_args, stdin)
def create_noise_file(self):
if ipautil.file_exists(self.noise_fname):
os.remove(self.noise_fname)
f = open(self.noise_fname, "w")
f.write(self.gen_password())
self.set_perms(self.noise_fname)
def create_passwd_file(self, passwd=None):
ipautil.backup_file(self.passwd_fname)
f = open(self.passwd_fname, "w")
if passwd is not None:
f.write("%s\n" % passwd)
else:
f.write(self.gen_password())
f.close()
self.set_perms(self.passwd_fname)
def create_certdbs(self):
ipautil.backup_file(self.certdb_fname)
ipautil.backup_file(self.keydb_fname)
ipautil.backup_file(self.secmod_fname)
self.nssdb.create_db(self.passwd_fname)
self.set_perms(self.passwd_fname, write=True)
def list_certs(self):
"""
Return a tuple of tuples containing (nickname, trust)
"""
return self.nssdb.list_certs()
def has_nickname(self, nickname):
"""
Returns True if nickname exists in the certdb, False otherwise.
This could also be done directly with:
certutil -L -d -n <nickname> ...
"""
certs = self.list_certs()
for cert in certs:
if nickname == cert[0]:
return True
return False
def export_ca_cert(self, nickname, create_pkcs12=False):
"""create_pkcs12 tells us whether we should create a PKCS#12 file
of the CA or not. If we are running on a replica then we won't
have the private key to make a PKCS#12 file so we don't need to
do that step."""
# export the CA cert for use with other apps
ipautil.backup_file(self.cacert_fname)
root_nicknames = self.find_root_cert(nickname)[:-1]
fd = open(self.cacert_fname, "w")
for root in root_nicknames:
result = self.run_certutil(["-L", "-n", root, "-a"],
capture_output=True)
fd.write(result.output)
fd.close()
os.chmod(self.cacert_fname, stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH)
if create_pkcs12:
ipautil.backup_file(self.pk12_fname)
ipautil.run([
paths.PK12UTIL, "-d", self.secdir, "-o", self.pk12_fname, "-n",
self.cacert_name, "-w", self.passwd_fname, "-k",
self.passwd_fname
])
self.set_perms(self.pk12_fname)
def load_cacert(self, cacert_fname, trust_flags):
"""
Load all the certificates from a given file. It is assumed that
this file creates CA certificates.
"""
fd = open(cacert_fname)
certs = fd.read()
fd.close()
ca_dn = DN(('CN', 'Certificate Authority'), self.subject_base)
st = 0
while True:
try:
(cert, st) = find_cert_from_txt(certs, st)
_rdn, subject_dn = get_cert_nickname(cert)
if subject_dn == ca_dn:
nick = get_ca_nickname(self.realm)
else:
nick = str(subject_dn)
self.nssdb.add_cert(cert, nick, trust_flags, pem=True)
except RuntimeError:
break
def get_cert_from_db(self, nickname, pem=True):
"""
Retrieve a certificate from the current NSS database for nickname.
pem controls whether the value returned PEM or DER-encoded. The
default is the data straight from certutil -a.
"""
try:
args = ["-L", "-n", nickname, "-a"]
result = self.run_certutil(args, capture_output=True)
cert = result.output
if pem:
return cert
else:
cert, _start = find_cert_from_txt(cert, start=0)
cert = x509.strip_header(cert)
dercert = base64.b64decode(cert)
return dercert
except ipautil.CalledProcessError:
return ''
def track_server_cert(self,
nickname,
principal,
password_file=None,
command=None):
"""
Tell certmonger to track the given certificate nickname.
If command is not a full path then it is prefixed with
/usr/lib[64]/ipa/certmonger.
"""
if command is not None and not os.path.isabs(command):
command = paths.CERTMONGER_COMMAND_TEMPLATE % (command)
try:
request_id = certmonger.start_tracking(nickname, self.secdir,
password_file, command)
except RuntimeError as e:
root_logger.error(
"certmonger failed starting to track certificate: %s" % str(e))
return
cert = self.get_cert_from_db(nickname)
cert_obj = x509.load_certificate(cert)
subject = str(DN(cert_obj.subject))
certmonger.add_principal(request_id, principal)
certmonger.add_subject(request_id, subject)
def untrack_server_cert(self, nickname):
"""
Tell certmonger to stop tracking the given certificate nickname.
"""
try:
certmonger.stop_tracking(self.secdir, nickname=nickname)
except RuntimeError as e:
root_logger.error(
"certmonger failed to stop tracking certificate: %s" % str(e))
def create_server_cert(self,
nickname,
hostname,
other_certdb=None,
subject=None):
"""
If we are using a dogtag CA then other_certdb contains the RA agent key
that will issue our cert.
You can override the certificate Subject by specifying a subject.
Returns a certificate in DER format.
"""
cdb = other_certdb
if not cdb:
cdb = self
if subject is None:
subject = DN(('CN', hostname), self.subject_base)
self.request_cert(subject, san_dnsnames=[hostname])
cdb.issue_server_cert(self.certreq_fname, self.certder_fname)
self.import_cert(self.certder_fname, nickname)
fd = open(self.certder_fname, "r")
dercert = fd.read()
fd.close()
os.unlink(self.certreq_fname)
os.unlink(self.certder_fname)
return dercert
def request_cert(self,
subject,
certtype="rsa",
keysize="2048",
san_dnsnames=None):
assert isinstance(subject, DN)
self.create_noise_file()
self.setup_cert_request()
args = [
"-R", "-s",
str(subject), "-o", self.certreq_fname, "-k", certtype, "-g",
keysize, "-z", self.noise_fname, "-f", self.passwd_fname, "-a"
]
if san_dnsnames is not None and len(san_dnsnames) > 0:
args += ['-8', ','.join(san_dnsnames)]
result = self.run_certutil(args,
capture_output=True,
capture_error=True)
os.remove(self.noise_fname)
return (result.output, result.error_output)
def issue_server_cert(self, certreq_fname, cert_fname):
self.setup_cert_request()
if self.host_name is None:
raise RuntimeError("CA Host is not set.")
f = open(certreq_fname, "r")
csr = f.readlines()
f.close()
csr = "".join(csr)
# We just want the CSR bits, make sure there is nothing else
csr = pkcs10.strip_header(csr)
params = {
'profileId': dogtag.DEFAULT_PROFILE,
'cert_request_type': 'pkcs10',
'requestor_name': 'IPA Installer',
'cert_request': csr,
'xmlOutput': 'true'
}
# Send the request to the CA
f = open(self.passwd_fname, "r")
password = f.readline()
f.close()
result = dogtag.https_request(self.host_name, 8443,
"/ca/ee/ca/profileSubmitSSLClient",
self.secdir, password, "ipaCert",
**params)
http_status, _http_headers, http_body = result
root_logger.debug("CA answer: %s", http_body)
if http_status != 200:
raise CertificateOperationError(
error=_('Unable to communicate with CMS (status %d)') %
http_status)
# The result is an XML blob. Pull the certificate out of that
doc = xml.dom.minidom.parseString(http_body)
item_node = doc.getElementsByTagName("b64")
try:
try:
cert = item_node[0].childNodes[0].data
except IndexError:
raise RuntimeError("Certificate issuance failed")
finally:
doc.unlink()
# base64-decode the result for uniformity
cert = base64.b64decode(cert)
# Write the certificate to a file. It will be imported in a later
# step. This file will be read later to be imported.
f = open(cert_fname, "w")
f.write(cert)
f.close()
def issue_signing_cert(self, certreq_fname, cert_fname):
self.setup_cert_request()
if self.host_name is None:
raise RuntimeError("CA Host is not set.")
f = open(certreq_fname, "r")
csr = f.readlines()
f.close()
csr = "".join(csr)
# We just want the CSR bits, make sure there is no thing else
csr = pkcs10.strip_header(csr)
params = {
'profileId': 'caJarSigningCert',
'cert_request_type': 'pkcs10',
'requestor_name': 'IPA Installer',
'cert_request': csr,
'xmlOutput': 'true'
}
# Send the request to the CA
f = open(self.passwd_fname, "r")
password = f.readline()
f.close()
result = dogtag.https_request(self.host_name, 8443,
"/ca/ee/ca/profileSubmitSSLClient",
self.secdir, password, "ipaCert",
**params)
http_status, _http_headers, http_body = result
if http_status != 200:
raise RuntimeError("Unable to submit cert request")
# The result is an XML blob. Pull the certificate out of that
doc = xml.dom.minidom.parseString(http_body)
item_node = doc.getElementsByTagName("b64")
cert = item_node[0].childNodes[0].data
doc.unlink()
# base64-decode the cert for uniformity
cert = base64.b64decode(cert)
# Write the certificate to a file. It will be imported in a later
# step. This file will be read later to be imported.
f = open(cert_fname, "w")
f.write(cert)
f.close()
def add_cert(self, cert, nick, flags, pem=False):
self.nssdb.add_cert(cert, nick, flags, pem)
def import_cert(self, cert_fname, nickname):
"""
Load a certificate from a PEM file and add minimal trust.
"""
args = [
"-A", "-n", nickname, "-t", "u,u,u", "-i", cert_fname, "-f",
self.passwd_fname
]
self.run_certutil(args)
def delete_cert(self, nickname):
self.nssdb.delete_cert(nickname)
def create_pin_file(self):
"""
This is the format of Directory Server pin files.
"""
ipautil.backup_file(self.pin_fname)
f = open(self.pin_fname, "w")
f.write("Internal (Software) Token:")
pwdfile = open(self.passwd_fname)
f.write(pwdfile.read())
f.close()
pwdfile.close()
self.set_perms(self.pin_fname)
def create_password_conf(self):
"""
This is the format of mod_nss pin files.
"""
ipautil.backup_file(self.pwd_conf)
f = open(self.pwd_conf, "w")
f.write("internal:")
pwdfile = open(self.passwd_fname)
f.write(pwdfile.read())
f.close()
pwdfile.close()
self.set_perms(self.pwd_conf, uid=constants.HTTPD_USER)
def find_root_cert(self, nickname):
"""
Given a nickname, return a list of the certificates that make up
the trust chain.
"""
root_nicknames = self.nssdb.get_trust_chain(nickname)
return root_nicknames
def trust_root_cert(self, root_nickname, trust_flags=None):
if root_nickname is None:
root_logger.debug(
"Unable to identify root certificate to trust. Continuing but things are likely to fail."
)
return
try:
self.nssdb.trust_root_cert(root_nickname, trust_flags)
except RuntimeError:
pass
def find_server_certs(self):
return self.nssdb.find_server_certs()
def import_pkcs12(self, pkcs12_fname, pkcs12_passwd=None):
return self.nssdb.import_pkcs12(pkcs12_fname,
self.passwd_fname,
pkcs12_passwd=pkcs12_passwd)
def export_pkcs12(self, pkcs12_fname, pkcs12_pwd_fname, nickname=None):
if nickname is None:
nickname = get_ca_nickname(api.env.realm)
ipautil.run([
paths.PK12UTIL, "-d", self.secdir, "-o", pkcs12_fname, "-n",
nickname, "-k", self.passwd_fname, "-w", pkcs12_pwd_fname
])
def export_pem_p12(self, pkcs12_fname, pkcs12_pwd_fname, nickname,
pem_fname):
ipautil.run([
paths.OPENSSL, "pkcs12", "-export", "-name", nickname, "-in",
pem_fname, "-out", pkcs12_fname, "-passout",
"file:" + pkcs12_pwd_fname
])
def create_from_cacert(self, cacert_fname, passwd=None):
if ipautil.file_exists(self.certdb_fname):
# We already have a cert db, see if it is for the same CA.
# If it is we leave things as they are.
f = open(cacert_fname, "r")
newca = f.readlines()
f.close()
newca = "".join(newca)
newca, _st = find_cert_from_txt(newca)
cacert = self.get_cert_from_db(self.cacert_name)
if cacert != '':
cacert, _st = find_cert_from_txt(cacert)
if newca == cacert:
return
# The CA certificates are different or something went wrong. Start with
# a new certificate database.
self.create_passwd_file(passwd)
self.create_certdbs()
self.load_cacert(cacert_fname, 'CT,C,C')
def create_from_pkcs12(self,
pkcs12_fname,
pkcs12_passwd,
passwd=None,
ca_file=None,
trust_flags=None):
"""Create a new NSS database using the certificates in a PKCS#12 file.
pkcs12_fname: the filename of the PKCS#12 file
pkcs12_pwd_fname: the file containing the pin for the PKCS#12 file
nickname: the nickname/friendly-name of the cert we are loading
passwd: The password to use for the new NSS database we are creating
The global CA may be added as well in case it wasn't included in the
PKCS#12 file. Extra certs won't hurt in any case.
The global CA may be specified in ca_file, as a PEM filename.
"""
self.create_noise_file()
self.create_passwd_file(passwd)
self.create_certdbs()
self.init_from_pkcs12(pkcs12_fname,
pkcs12_passwd,
ca_file=ca_file,
trust_flags=trust_flags)
def init_from_pkcs12(self,
pkcs12_fname,
pkcs12_passwd,
ca_file=None,
trust_flags=None):
self.import_pkcs12(pkcs12_fname, pkcs12_passwd)
server_certs = self.find_server_certs()
if len(server_certs) == 0:
raise RuntimeError(
"Could not find a suitable server cert in import in %s" %
pkcs12_fname)
if ca_file:
try:
with open(ca_file) as fd:
certs = fd.read()
except IOError as e:
raise RuntimeError("Failed to open %s: %s" %
(ca_file, e.strerror))
st = 0
num = 1
while True:
try:
cert, st = find_cert_from_txt(certs, st)
except RuntimeError:
break
self.add_cert(cert, 'CA %s' % num, ',,', pem=True)
num += 1
# We only handle one server cert
nickname = server_certs[0][0]
ca_names = self.find_root_cert(nickname)[:-1]
if len(ca_names) == 0:
raise RuntimeError("Could not find a CA cert in %s" % pkcs12_fname)
self.cacert_name = ca_names[-1]
self.trust_root_cert(self.cacert_name, trust_flags)
self.create_pin_file()
self.export_ca_cert(nickname, False)
def install_pem_from_p12(self, p12_fname, p12_passwd, pem_fname):
pwd = ipautil.write_tmp_file(p12_passwd)
ipautil.run([
paths.OPENSSL, "pkcs12", "-nodes", "-in", p12_fname, "-out",
pem_fname, "-passin", "file:" + pwd.name
])
def publish_ca_cert(self, location):
shutil.copy(self.cacert_fname, location)
os.chmod(location, 0o444)
def export_pem_cert(self, nickname, location):
return self.nssdb.export_pem_cert(nickname, location)
def request_service_cert(self, nickname, principal, host, pwdconf=False):
if pwdconf:
self.create_password_conf()
reqid = certmonger.request_cert(nssdb=self.secdir,
nickname=nickname,
principal=principal,
subject=host,
passwd_fname=self.passwd_fname)
# Now wait for the cert to appear. Check three times then abort
certmonger.wait_for_request(reqid, timeout=60)
def test_dbm_raise():
with pytest.raises(ValueError) as e:
NSSDatabase(dbtype="dbm")
assert ("NSS is built without support of the legacy database(DBM)"
in str(e.value))
def test_delete_cert_and_key():
"""Test that delete_cert + delete_key always deletes everything
Test with a NSSDB that contains:
- cert + key
- key only
- cert only
- none of them
"""
cmd = ipautil.run(['mktemp'], capture_output=True)
p12file = cmd.output.strip()
try:
with NSSDatabase() as nssdb:
nssdb.create_db()
# 1. Test delete_key_and_cert when cert + key are present
# Create a NSS DB with cert + key
create_selfsigned(nssdb)
# Save both in a p12 file for latter use
ipautil.run([
'pk12util', '-o', p12file, '-n', CERTNICK, '-d', nssdb.secdir,
'-k', nssdb.pwd_file, '-w', nssdb.pwd_file
])
# Delete cert and key
nssdb.delete_key_and_cert(CERTNICK)
# make sure that everything was deleted
assert len(nssdb.list_keys()) == 0
assert len(nssdb.list_certs()) == 0
# 2. Test delete_key_and_cert when only key is present
# Import cert and key then remove cert
import_args = [
'pk12util', '-i', p12file, '-d', nssdb.secdir, '-k',
nssdb.pwd_file, '-w', nssdb.pwd_file
]
ipautil.run(import_args)
nssdb.delete_cert(CERTNICK)
# Delete cert and key
nssdb.delete_key_and_cert(CERTNICK)
# make sure that everything was deleted
assert len(nssdb.list_keys()) == 0
assert len(nssdb.list_certs()) == 0
# 3. Test delete_key_and_cert when only cert is present
# Import cert and key then remove key
ipautil.run(import_args)
nssdb.delete_key_only(CERTNICK)
# make sure the db contains only the cert
assert len(nssdb.list_keys()) == 0
assert len(nssdb.list_certs()) == 1
# Delete cert and key when key is not present
nssdb.delete_key_and_cert(CERTNICK)
# make sure that everything was deleted
assert len(nssdb.list_keys()) == 0
assert len(nssdb.list_certs()) == 0
# 4. Test delete_key_and_cert with a wrong nickname
# Import cert and key
ipautil.run(import_args)
# Delete cert and key
nssdb.delete_key_and_cert('wrongnick')
# make sure that nothing was deleted
assert len(nssdb.list_keys()) == 1
assert len(nssdb.list_certs()) == 1
finally:
os.unlink(p12file)
class CertDB:
"""An IPA-server-specific wrapper around NSS
This class knows IPA-specific details such as nssdir location, or the
CA cert name.
``subject_base``
Realm subject base DN. This argument is required when creating
server or object signing certs.
``ca_subject``
IPA CA subject DN. This argument is required when importing
CA certificates into the certificate database.
"""
# TODO: Remove all selfsign code
def __init__(self,
realm,
nssdir,
fstore=None,
host_name=None,
subject_base=None,
ca_subject=None,
user=None,
group=None,
mode=None,
create=False,
dbtype='auto'):
self.nssdb = NSSDatabase(nssdir, dbtype=dbtype)
self.realm = realm
self.noise_fname = os.path.join(self.secdir, "noise.txt")
self.pk12_fname = os.path.join(self.secdir, "cacert.p12")
self.pin_fname = os.path.join(self.secdir + "pin.txt")
self.reqdir = None
self.certreq_fname = None
self.certder_fname = None
self.host_name = host_name
self.ca_subject = ca_subject
self.subject_base = subject_base
self.cacert_name = get_ca_nickname(self.realm)
self.user = user
self.group = group
self.mode = mode
self.uid = 0
self.gid = 0
if not create:
if os.path.isdir(self.secdir):
# We are going to set the owner of all of the cert
# files to the owner of the containing directory
# instead of that of the process. This works when
# this is called by root for a daemon that runs as
# a normal user
mode = os.stat(self.secdir)
self.uid = mode[stat.ST_UID]
self.gid = mode[stat.ST_GID]
else:
if user is not None:
pu = pwd.getpwnam(user)
self.uid = pu.pw_uid
self.gid = pu.pw_gid
if group is not None:
self.gid = grp.getgrnam(group).gr_gid
self.create_certdbs()
if fstore:
self.fstore = fstore
else:
self.fstore = sysrestore.FileStore(paths.SYSRESTORE)
ca_subject = ipautil.dn_attribute_property('_ca_subject')
subject_base = ipautil.dn_attribute_property('_subject_base')
# migration changes paths, just forward attribute lookup to nssdb
@property
def secdir(self):
return self.nssdb.secdir
@property
def dbtype(self):
return self.nssdb.dbtype
@property
def certdb_fname(self):
return self.nssdb.certdb
@property
def keydb_fname(self):
return self.nssdb.keydb
@property
def secmod_fname(self):
return self.nssdb.secmod
@property
def passwd_fname(self):
return self.nssdb.pwd_file
def exists(self):
"""
Checks whether all NSS database files + our pwd_file exist
"""
return self.nssdb.exists()
def __del__(self):
if self.reqdir is not None:
shutil.rmtree(self.reqdir, ignore_errors=True)
self.reqdir = None
self.nssdb.close()
def setup_cert_request(self):
"""
Create a temporary directory to store certificate requests and
certificates. This should be called before requesting certificates.
This is set outside of __init__ to avoid creating a temporary
directory every time we open a cert DB.
"""
if self.reqdir is not None:
return
self.reqdir = tempfile.mkdtemp('', 'ipa-', paths.VAR_LIB_IPA)
self.certreq_fname = self.reqdir + "/tmpcertreq"
self.certder_fname = self.reqdir + "/tmpcert.der"
def set_perms(self, fname, write=False):
perms = stat.S_IRUSR
if write:
perms |= stat.S_IWUSR
if hasattr(fname, 'fileno'):
os.fchown(fname.fileno(), self.uid, self.gid)
os.fchmod(fname.fileno(), perms)
else:
os.chown(fname, self.uid, self.gid)
os.chmod(fname, perms)
def run_certutil(self, args, stdin=None, **kwargs):
return self.nssdb.run_certutil(args, stdin, **kwargs)
def create_noise_file(self):
if os.path.isfile(self.noise_fname):
os.remove(self.noise_fname)
with open(self.noise_fname, "w") as f:
self.set_perms(f)
f.write(ipautil.ipa_generate_password())
def create_passwd_file(self, passwd=None):
ipautil.backup_file(self.passwd_fname)
with open(self.passwd_fname, "w") as f:
self.set_perms(f)
if passwd is not None:
f.write("%s\n" % passwd)
else:
f.write(ipautil.ipa_generate_password())
def create_certdbs(self):
self.nssdb.create_db(user=self.user,
group=self.group,
mode=self.mode,
backup=True)
self.set_perms(self.passwd_fname, write=True)
def restore(self):
self.nssdb.restore()
def list_certs(self):
"""
Return a tuple of tuples containing (nickname, trust)
"""
return self.nssdb.list_certs()
def has_nickname(self, nickname):
"""
Returns True if nickname exists in the certdb, False otherwise.
This could also be done directly with:
certutil -L -d -n <nickname> ...
"""
certs = self.list_certs()
for cert in certs:
if nickname == cert[0]:
return True
return False
def export_ca_cert(self, nickname, create_pkcs12=False):
"""create_pkcs12 tells us whether we should create a PKCS#12 file
of the CA or not. If we are running on a replica then we won't
have the private key to make a PKCS#12 file so we don't need to
do that step."""
cacert_fname = paths.IPA_CA_CRT
# export the CA cert for use with other apps
ipautil.backup_file(cacert_fname)
root_nicknames = self.find_root_cert(nickname)[:-1]
with open(cacert_fname, "w") as f:
os.fchmod(f.fileno(), 0o644)
for root in root_nicknames:
result = self.run_certutil(["-L", "-n", root, "-a"],
capture_output=True)
f.write(result.output)
if create_pkcs12:
ipautil.backup_file(self.pk12_fname)
self.nssdb.run_pk12util([
"-o",
self.pk12_fname,
"-n",
self.cacert_name,
"-k",
self.passwd_fname,
"-w",
self.passwd_fname,
])
self.set_perms(self.pk12_fname)
def load_cacert(self, cacert_fname, trust_flags):
"""
Load all the certificates from a given file. It is assumed that
this file creates CA certificates.
"""
with open(cacert_fname) as f:
certs = f.read()
st = 0
while True:
try:
(cert, st) = find_cert_from_txt(certs, st)
_rdn, subject_dn = get_cert_nickname(cert)
if subject_dn == self.ca_subject:
nick = get_ca_nickname(self.realm)
else:
nick = str(subject_dn)
self.nssdb.add_cert(cert, nick, trust_flags)
except RuntimeError:
break
def get_cert_from_db(self, nickname):
"""
Retrieve a certificate from the current NSS database for nickname.
"""
try:
args = ["-L", "-n", nickname, "-a"]
result = self.run_certutil(args, capture_output=True)
return x509.load_pem_x509_certificate(result.raw_output)
except ipautil.CalledProcessError:
return None
def track_server_cert(self,
nickname,
principal,
password_file=None,
command=None,
profile=None):
"""
Tell certmonger to track the given certificate nickname.
"""
try:
request_id = certmonger.start_tracking(self.secdir,
nickname=nickname,
pinfile=password_file,
post_command=command,
profile=profile)
except RuntimeError as e:
logger.error("certmonger failed starting to track certificate: %s",
str(e))
return
cert = self.get_cert_from_db(nickname)
subject = str(DN(cert.subject))
certmonger.add_principal(request_id, principal)
certmonger.add_subject(request_id, subject)
def untrack_server_cert(self, nickname):
"""
Tell certmonger to stop tracking the given certificate nickname.
"""
try:
certmonger.stop_tracking(self.secdir, nickname=nickname)
except RuntimeError as e:
logger.error("certmonger failed to stop tracking certificate: %s",
str(e))
def create_server_cert(self, nickname, hostname, subject=None):
"""
If we are using a dogtag CA then other_certdb contains the RA agent key
that will issue our cert.
You can override the certificate Subject by specifying a subject.
Returns a certificate in DER format.
"""
if subject is None:
subject = DN(('CN', hostname), self.subject_base)
self.request_cert(subject, san_dnsnames=[hostname])
try:
self.issue_server_cert(self.certreq_fname, self.certder_fname)
self.import_cert(self.certder_fname, nickname)
with open(self.certder_fname, "rb") as f:
dercert = f.read()
return x509.load_der_x509_certificate(dercert)
finally:
for fname in (self.certreq_fname, self.certder_fname):
try:
os.unlink(fname)
except OSError:
pass
def request_cert(self,
subject,
certtype="rsa",
keysize="2048",
san_dnsnames=None):
assert isinstance(subject, DN)
self.create_noise_file()
self.setup_cert_request()
args = [
"-R", "-s",
str(subject), "-o", self.certreq_fname, "-k", certtype, "-g",
keysize, "-z", self.noise_fname, "-f", self.passwd_fname, "-a"
]
if san_dnsnames is not None and len(san_dnsnames) > 0:
args += ['-8', ','.join(san_dnsnames)]
result = self.run_certutil(args,
capture_output=True,
capture_error=True)
os.remove(self.noise_fname)
return (result.output, result.error_output)
def issue_server_cert(self, certreq_fname, cert_fname):
self.setup_cert_request()
if self.host_name is None:
raise RuntimeError("CA Host is not set.")
with open(certreq_fname, "rb") as f:
csr = f.read()
# We just want the CSR bits, make sure there is no thing else
csr = strip_csr_header(csr).decode('utf8')
params = {
'profileId': dogtag.DEFAULT_PROFILE,
'cert_request_type': 'pkcs10',
'requestor_name': 'IPA Installer',
'cert_request': csr,
'xmlOutput': 'true'
}
# Send the request to the CA
result = dogtag.https_request(self.host_name,
8443,
url="/ca/ee/ca/profileSubmitSSLClient",
cafile=api.env.tls_ca_cert,
client_certfile=paths.RA_AGENT_PEM,
client_keyfile=paths.RA_AGENT_KEY,
**params)
http_status, _http_headers, http_body = result
logger.debug("CA answer: %r", http_body)
if http_status != 200:
raise CertificateOperationError(
error=_('Unable to communicate with CMS (status %d)') %
http_status)
# The result is an XML blob. Pull the certificate out of that
doc = xml.dom.minidom.parseString(http_body)
item_node = doc.getElementsByTagName("b64")
try:
try:
cert = item_node[0].childNodes[0].data
except IndexError:
raise RuntimeError("Certificate issuance failed")
finally:
doc.unlink()
# base64-decode the result for uniformity
cert = base64.b64decode(cert)
# Write the certificate to a file. It will be imported in a later
# step. This file will be read later to be imported.
with open(cert_fname, "wb") as f:
f.write(cert)
def add_cert(self, cert, nick, flags):
self.nssdb.add_cert(cert, nick, flags)
def import_cert(self, cert_fname, nickname):
"""
Load a certificate from a PEM file and add minimal trust.
"""
args = [
"-A", "-n", nickname, "-t", "u,u,u", "-i", cert_fname, "-f",
self.passwd_fname
]
self.run_certutil(args)
def delete_cert(self, nickname):
self.nssdb.delete_cert(nickname)
def create_pin_file(self):
"""
This is the format of Directory Server pin files.
"""
ipautil.backup_file(self.pin_fname)
with open(self.pin_fname, "w") as pinfile:
self.set_perms(pinfile)
pinfile.write("Internal (Software) Token:")
with open(self.passwd_fname) as pwdfile:
pinfile.write(pwdfile.read())
def find_root_cert(self, nickname):
"""
Given a nickname, return a list of the certificates that make up
the trust chain.
"""
root_nicknames = self.nssdb.get_trust_chain(nickname)
return root_nicknames
def trust_root_cert(self, root_nickname, trust_flags):
if root_nickname is None:
logger.debug("Unable to identify root certificate to trust. "
"Continuing but things are likely to fail.")
return
try:
self.nssdb.trust_root_cert(root_nickname, trust_flags)
except RuntimeError:
pass
def find_server_certs(self):
return self.nssdb.find_server_certs()
def import_pkcs12(self, pkcs12_fname, pkcs12_passwd=None):
return self.nssdb.import_pkcs12(pkcs12_fname,
pkcs12_passwd=pkcs12_passwd)
def export_pkcs12(self, pkcs12_fname, pkcs12_pwd_fname, nickname=None):
if nickname is None:
nickname = get_ca_nickname(api.env.realm)
self.nssdb.run_pk12util([
"-o", pkcs12_fname, "-n", nickname, "-k", self.passwd_fname, "-w",
pkcs12_pwd_fname
])
def create_from_cacert(self):
"""
Ensure that a CA chain is in the NSS database.
If an NSS database already exists ensure that the CA chain
we want to load is in there and if not add it. If there is no
database then create an NSS database and load the CA chain.
"""
cacert_fname = paths.IPA_CA_CRT
if self.nssdb.exists():
# We already have a cert db, see if it is for the same CA.
# If it is we leave things as they are.
with open(cacert_fname, "r") as f:
newca = f.read()
newca, _st = find_cert_from_txt(newca)
cacert = self.get_cert_from_db(self.cacert_name)
if newca == cacert:
return
# The CA certificates are different or something went wrong. Start with
# a new certificate database.
self.create_passwd_file()
self.create_certdbs()
self.load_cacert(cacert_fname, IPA_CA_TRUST_FLAGS)
def create_from_pkcs12(self, pkcs12_fname, pkcs12_passwd, ca_file,
trust_flags):
"""Create a new NSS database using the certificates in a PKCS#12 file.
pkcs12_fname: the filename of the PKCS#12 file
pkcs12_pwd_fname: the file containing the pin for the PKCS#12 file
nickname: the nickname/friendly-name of the cert we are loading
The global CA may be added as well in case it wasn't included in the
PKCS#12 file. Extra certs won't hurt in any case.
The global CA may be specified in ca_file, as a PEM filename.
"""
self.create_noise_file()
self.create_passwd_file()
self.create_certdbs()
self.init_from_pkcs12(pkcs12_fname,
pkcs12_passwd,
ca_file=ca_file,
trust_flags=trust_flags)
def init_from_pkcs12(self, pkcs12_fname, pkcs12_passwd, ca_file,
trust_flags):
self.import_pkcs12(pkcs12_fname, pkcs12_passwd)
server_certs = self.find_server_certs()
if len(server_certs) == 0:
raise RuntimeError(
"Could not find a suitable server cert in import in %s" %
pkcs12_fname)
if ca_file:
try:
with open(ca_file) as fd:
certs = fd.read()
except IOError as e:
raise RuntimeError("Failed to open %s: %s" %
(ca_file, e.strerror))
st = 0
num = 1
while True:
try:
cert, st = find_cert_from_txt(certs, st)
except RuntimeError:
break
self.add_cert(cert, 'CA %s' % num, EMPTY_TRUST_FLAGS)
num += 1
# We only handle one server cert
nickname = server_certs[0][0]
ca_names = self.find_root_cert(nickname)[:-1]
if len(ca_names) == 0:
raise RuntimeError("Could not find a CA cert in %s" % pkcs12_fname)
self.cacert_name = ca_names[-1]
self.trust_root_cert(self.cacert_name, trust_flags)
self.export_ca_cert(nickname, False)
def export_pem_cert(self, nickname, location):
return self.nssdb.export_pem_cert(nickname, location)
def request_service_cert(self,
nickname,
principal,
host,
resubmit_timeout=None):
if resubmit_timeout is None:
resubmit_timeout = api.env.certmonger_wait_timeout
return certmonger.request_and_wait_for_cert(
certpath=self.secdir,
storage='NSSDB',
nickname=nickname,
principal=principal,
subject=host,
dns=[host],
passwd_fname=self.passwd_fname,
resubmit_timeout=resubmit_timeout)
def is_ipa_issued_cert(self, api, nickname):
"""
Return True if the certificate contained in the CertDB with the
provided nickname has been issued by IPA.
Note that this method can only be executed if the api has been
initialized.
This method needs to compare the cert issuer (from the NSS DB
and the subject from the CA (from LDAP), because nicknames are not
always aligned.
The cert can be issued directly by IPA. In this case, the cert
issuer is IPA CA subject.
"""
cert = self.get_cert_from_db(nickname)
if cert is None:
raise RuntimeError("Could not find the cert %s in %s" %
(nickname, self.secdir))
return is_ipa_issued_cert(api, cert)
def needs_upgrade_format(self):
"""Check if NSSDB file format needs upgrade
Only upgrade if it's an existing dbm database and default
database type is no 'dbm'.
"""
return (self.nssdb.dbtype == 'dbm' and self.exists())
def upgrade_format(self):
"""Upgrade NSSDB to new file format
"""
self.nssdb.convert_db()
def __init__(self,
realm,
nssdir,
fstore=None,
host_name=None,
subject_base=None,
ca_subject=None,
user=None,
group=None,
mode=None,
create=False):
self.nssdb = NSSDatabase(nssdir)
self.secdir = nssdir
self.realm = realm
self.noise_fname = self.secdir + "/noise.txt"
self.certdb_fname = self.secdir + "/cert8.db"
self.keydb_fname = self.secdir + "/key3.db"
self.secmod_fname = self.secdir + "/secmod.db"
self.pk12_fname = self.secdir + "/cacert.p12"
self.pin_fname = self.secdir + "/pin.txt"
self.reqdir = None
self.certreq_fname = None
self.certder_fname = None
self.host_name = host_name
self.ca_subject = ca_subject
self.subject_base = subject_base
try:
self.cwd = os.path.abspath(os.getcwd())
except OSError as e:
raise RuntimeError(
"Unable to determine the current directory: %s" % str(e))
self.cacert_name = get_ca_nickname(self.realm)
self.user = user
self.group = group
self.mode = mode
self.uid = 0
self.gid = 0
if not create:
if os.path.isdir(self.secdir):
# We are going to set the owner of all of the cert
# files to the owner of the containing directory
# instead of that of the process. This works when
# this is called by root for a daemon that runs as
# a normal user
mode = os.stat(self.secdir)
self.uid = mode[stat.ST_UID]
self.gid = mode[stat.ST_GID]
else:
if user is not None:
pu = pwd.getpwnam(user)
self.uid = pu.pw_uid
self.gid = pu.pw_gid
if group is not None:
self.gid = grp.getgrnam(group).gr_gid
self.create_certdbs()
if fstore:
self.fstore = fstore
else:
self.fstore = sysrestore.FileStore(paths.SYSRESTORE)
