def install_ipa_certs(subject_base, ca_subject_dn, certs): """Print details and install renewed IPA certificates.""" for certtype, oldcert in certs: cert_path = "/etc/pki/pki-tomcat/certs/{}-renewed.crt" \ .format(oldcert.serial_number) cert = x509.load_certificate_from_file(cert_path) print_cert_info("Renewed IPA", certtype.value, cert) if certtype is IPACertType.IPARA: shutil.copyfile(cert_path, paths.RA_AGENT_PEM) cainstance.update_people_entry(cert) replicate_cert(subject_base, ca_subject_dn, cert) elif certtype is IPACertType.HTTPS: shutil.copyfile(cert_path, paths.HTTPD_CERT_FILE) elif certtype is IPACertType.LDAPS: ds_dbdir = dsinstance.config_dirname( realm_to_serverid(api.env.realm)) db = NSSDatabase(nssdir=ds_dbdir) db.delete_cert('Server-Cert') db.import_pem_cert('Server-Cert', EMPTY_TRUST_FLAGS, cert_path) elif certtype is IPACertType.KDC: shutil.copyfile(cert_path, paths.KDC_CERT)
def install_ipa_certs(subject_base, ca_subject_dn, certs): """Print details and install renewed IPA certificates.""" for certtype, oldcert in certs: cert_path = RENEWED_CERT_PATH_TEMPLATE.format(oldcert.serial_number) cert = x509.load_certificate_from_file(cert_path) print_cert_info("Renewed IPA", certtype.value, cert) if certtype is IPACertType.IPARA: shutil.copyfile(cert_path, paths.RA_AGENT_PEM) cainstance.update_people_entry(cert) replicate_cert(subject_base, ca_subject_dn, cert) elif certtype is IPACertType.HTTPS: shutil.copyfile(cert_path, paths.HTTPD_CERT_FILE) elif certtype is IPACertType.LDAPS: serverid = realm_to_serverid(api.env.realm) ds = dsinstance.DsInstance(realm_name=api.env.realm) ds_dbdir = dsinstance.config_dirname(serverid) db = NSSDatabase(nssdir=ds_dbdir) ds_nickname = ds.get_server_cert_nickname(serverid) db.delete_cert(ds_nickname) db.import_pem_cert(ds_nickname, EMPTY_TRUST_FLAGS, cert_path) elif certtype is IPACertType.KDC: shutil.copyfile(cert_path, paths.KDC_CERT)
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, []
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 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, 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(), 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) 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): """ 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: 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): cacert_fname = paths.IPA_CA_CRT if os.path.isfile(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 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): certmonger.request_and_wait_for_cert(certpath=self.secdir, storage='NSSDB', nickname=nickname, principal=principal, subject=host, passwd_fname=self.passwd_fname) 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()
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. ``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=paths.IPA_RADB_DIR, fstore=None, host_name=None, subject_base=None, ca_subject=None, user=None, group=None, mode=None, truncate=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.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 truncate and os.path.exists(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 __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 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(ipautil.ipa_generate_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(ipautil.ipa_generate_password()) f.close() self.set_perms(self.passwd_fname) 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 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] fd = open(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(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() 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. 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 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, 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 = 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. 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() 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", "-nokeys", "-in", p12_fname, "-out", pem_fname, "-passin", "file:" + pwd.name]) def install_key_from_p12(self, p12_fname, p12_passwd, pem_fname): pwd = ipautil.write_tmp_file(p12_passwd) ipautil.run([paths.OPENSSL, "pkcs12", "-nodes", "-nocerts", "-in", p12_fname, "-out", pem_fname, "-passin", "file:" + pwd.name]) def publish_ca_cert(self, location): self.nssdb.publish_ca_cert(self.cacert_name, location) 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)