# Authors: Karl MacMillan # # Copyright (C) 2007 Red Hat # see file 'COPYING' for use and warranty information # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . # import os, stat, subprocess, re import sys import errno import tempfile import shutil from ipapython.ipa_log_manager import * import urllib import xml.dom.minidom import pwd import fcntl import base64 from hashlib import sha1 from ipapython import nsslib from ipapython import dogtag from ipapython import sysrestore from ipapython import ipautil from ipapython import certmonger from ipapython.certdb import get_ca_nickname from ipalib import pkcs10 from ConfigParser import RawConfigParser, MissingSectionHeaderError from ipapython import services as ipaservices from ipalib import x509 from ipapython.dn import DN from ipalib.errors import CertificateOperationError from ipalib.text import _ from nss.error import NSPRError import nss.nss as nss from ipalib import api # Apache needs access to this database so we need to create it # where apache can reach NSS_DIR = "/etc/httpd/alias" CA_SERIALNO="/var/lib/ipa/ca_serialno" def ipa_self_signed(): """ Determine if the current IPA CA is self-signed or using another CA We do this based on the CA plugin that is currently in use. """ if api.env.ra_plugin == 'selfsign': return True else: return False def ipa_self_signed_master(): """ The selfsign backend is enabled only one a single master. Return True/False whether this is that master. Returns None if not a self-signed server. """ if ipa_self_signed(): return api.env.enable_ra else: return None def find_cert_from_txt(cert, start=0): """ Given a cert blob (str) which may or may not contian leading and trailing text, pull out just the certificate part. This will return the FIRST cert in a stream of data. Returns a tuple (certificate, last position in cert) """ s = cert.find('-----BEGIN CERTIFICATE-----', start) e = cert.find('-----END CERTIFICATE-----', s) if e > 0: e = e + 25 if s < 0 or e < 0: raise RuntimeError("Unable to find certificate") cert = cert[s:e] return (cert, e) def get_cert_nickname(cert): """ Using the subject from cert come up with a nickname suitable for NSS. The caller can decide whether to use just the RDN or the whole subject. Returns a tuple of (rdn, subject_dn) when rdn is the string representation of the first RDN in the subject and subject_dn is a DN object. """ nsscert = x509.load_certificate(cert) subject = str(nsscert.subject) dn = DN(subject) return (str(dn[0]), dn) def next_serial(serial_file=CA_SERIALNO): """ Get the next serial number if we're using an NSS-based self-signed CA. The file is an ini-like file with following properties: lastvalue = the last serial number handed out nextreplica = the serial number the next replica should start with replicainterval = the number to add to nextreplica the next time a replica is created File locking is attempted so we have unique serial numbers. """ fp = None parser = RawConfigParser() if ipautil.file_exists(serial_file): try: fp = open(serial_file, "r+") fcntl.flock(fp.fileno(), fcntl.LOCK_EX) parser.readfp(fp) serial = parser.getint('selfsign', 'lastvalue') cur_serial = serial + 1 except IOError, e: raise RuntimeError("Unable to determine serial number: %s" % str(e)) except MissingSectionHeaderError: fcntl.flock(fp.fileno(), fcntl.LOCK_UN) fp.close() f=open(serial_file,"r") r = f.readline() f.close() cur_serial = int(r) + 1 fp = open(serial_file, "w") fcntl.flock(fp.fileno(), fcntl.LOCK_EX) parser.add_section('selfsign') parser.set('selfsign', 'nextreplica', 500000) parser.set('selfsign', 'replicainterval', 500000) else: fp = open(serial_file, "w") fcntl.flock(fp.fileno(), fcntl.LOCK_EX) parser.add_section('selfsign') parser.set('selfsign', 'nextreplica', 500000) parser.set('selfsign', 'replicainterval', 500000) cur_serial = 1000 try: fp.seek(0) parser.set('selfsign', 'lastvalue', cur_serial) parser.write(fp) fp.flush() fcntl.flock(fp.fileno(), fcntl.LOCK_UN) fp.close() except IOError, e: raise RuntimeError("Unable to increment serial number: %s" % str(e)) return str(cur_serial) def next_replica(serial_file=CA_SERIALNO): """ Return the starting serial number for a new self-signed replica """ fp = None parser = RawConfigParser() if ipautil.file_exists(serial_file): try: fp = open(serial_file, "r+") fcntl.flock(fp.fileno(), fcntl.LOCK_EX) parser.readfp(fp) serial = parser.getint('selfsign', 'nextreplica') nextreplica = serial + parser.getint('selfsign', 'replicainterval') except IOError, e: raise RuntimeError("Unable to determine serial number: %s" % str(e)) else: raise RuntimeError("%s does not exist, cannot create replica" % serial_file) try: fp.seek(0) parser.set('selfsign', 'nextreplica', nextreplica) parser.write(fp) fp.flush() fcntl.flock(fp.fileno(), fcntl.LOCK_UN) fp.close() except IOError, e: raise RuntimeError("Unable to increment serial number: %s" % str(e)) return str(serial) class CertDB(object): def __init__(self, realm, nssdir=NSS_DIR, fstore=None, host_name=None, subject_base=None): 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 = "/etc/httpd/conf/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, e: raise RuntimeError("Unable to determine the current directory: %s" % str(e)) self.self_signed_ca = ipa_self_signed() if not subject_base: self.subject_base = DN(('O', 'IPA')) if self.self_signed_ca: self.cacert_name = get_ca_nickname(self.realm, 'CN=%s Certificate Authority') else: 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('/var/lib/ipa/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-', '/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_serial_from_pkcs12(self): """A CA cert was loaded from a PKCS#12 file. Set up our serial file""" cur_serial = self.find_cacert_serial() try: fp = open(CA_SERIALNO, "w") parser = RawConfigParser() parser.add_section('selfsign') parser.set('selfsign', 'lastvalue', cur_serial) parser.set('selfsign', 'nextreplica', 500000) parser.set('selfsign', 'replicainterval', 500000) parser.write(fp) fp.close() except IOError, e: raise RuntimeError("Unable to increment serial number: %s" % str(e)) 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): new_args = ["/usr/bin/certutil", "-d", self.secdir] new_args = new_args + args return ipautil.run(new_args, stdin) def run_signtool(self, args, stdin=None): if not self.self_signed_ca: f = open(self.passwd_fname, "r") password = f.readline() f.close() new_args = ["/usr/bin/signtool", "-d", self.secdir, "-p", password] else: new_args = ["/usr/bin/signtool", "-d", self.secdir] 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.run_certutil(["-N", "-f", self.passwd_fname]) self.set_perms(self.passwd_fname, write=True) def list_certs(self): """ Return a tuple of tuples containing (nickname, trust) """ p = subprocess.Popen(["/usr/bin/certutil", "-d", self.secdir, "-L"], stdout=subprocess.PIPE) certs = p.stdout.read() certs = certs.split("\n") # FIXME, this relies on NSS never changing the formatting of certutil certlist = [] for cert in certs: nickname = cert[0:61] trust = cert[61:] if re.match(r'\w+,\w+,\w+', trust): certlist.append((nickname.strip(), trust)) return tuple(certlist) 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 ... """ certs = self.list_certs() for cert in certs: if nickname == cert[0]: return True return False def create_ca_cert(self): os.chdir(self.secdir) subject = DN(('cn', '%s Certificate Authority' % self.realm)) p = subprocess.Popen(["/usr/bin/certutil", "-d", self.secdir, "-S", "-n", self.cacert_name, "-s", str(subject), "-x", "-t", "CT,,C", "-1", "-2", "-5", "-m", next_serial(), "-v", self.valid_months, "-z", self.noise_fname, "-f", self.passwd_fname], stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE) # Create key usage extension # 0 - Digital Signature # 1 - Non-repudiation # 5 - Cert signing key # Is this a critical extension [y/N]? y p.stdin.write("0\n1\n5\n9\ny\n") # Create basic constraint extension # Is this a CA certificate [y/N]? y # Enter the path length constraint, enter to skip [<0 for unlimited pat # Is this a critical extension [y/N]? y # 5 6 7 9 n -> SSL, S/MIME, Object signing CA p.stdin.write("y\n\ny\n") p.stdin.write("5\n6\n7\n9\nn\n") p.wait() os.chdir(self.cwd) 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) 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(["/usr/bin/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): """ 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.run_certutil(["-A", "-n", nick, "-t", "CT,,C", "-a"], stdin=cert) 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 find_cacert_serial(self): (out, err, returncode) = self.run_certutil(["-L", "-n", self.cacert_name]) data = out.split('\n') for line in data: x = re.match(r'\s+Serial Number: (\d+) .*', line) if x is not None: return x.group(1) raise RuntimeError("Unable to find serial number") 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 = '/usr/%s/ipa/certmonger/%s' % (libpath, command) cmonger = ipaservices.knownservices.certmonger cmonger.enable() ipaservices.knownservices.messagebus.start() cmonger.start() try: (stdout, stderr, rc) = certmonger.start_tracking(nickname, self.secdir, password_file, command) except (ipautil.CalledProcessError, RuntimeError), e: root_logger.error("certmonger failed starting to track certificate: %s" % str(e)) return cmonger.stop() cert = self.get_cert_from_db(nickname) nsscert = x509.load_certificate(cert, dbdir=self.secdir) subject = str(nsscert.subject) m = re.match('New tracking request "(\d+)" added', stdout) if not m: root_logger.error('Didn\'t get new %s request, got %s' % (cmonger.service_name, stdout)) raise RuntimeError('%s did not issue new tracking request for \'%s\' in \'%s\'. Use \'ipa-getcert list\' to list existing certificates.' % (cmonger.service_name, nickname, self.secdir)) request_id = m.group(1) certmonger.add_principal(request_id, principal) certmonger.add_subject(request_id, subject) cmonger.start() def untrack_server_cert(self, nickname): """ Tell certmonger to stop tracking the given certificate nickname. """ # Always start certmonger. We can't untrack something if it isn't # running cmonger = ipaservices.knownservices.certmonger ipaservices.knownservices.messagebus.start() cmonger.start() try: certmonger.stop_tracking(self.secdir, nickname=nickname) except (ipautil.CalledProcessError, RuntimeError), e: root_logger.error("certmonger failed to stop tracking certificate: %s" % str(e)) cmonger.stop() def create_server_cert(self, nickname, hostname, other_certdb=None, subject=None): """ other_certdb can mean one of two things, depending on the context. If we are using a self-signed CA then other_certdb contains the CA that will be signing our CSR. If we are using a dogtag CA then it 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.add_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.add_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] if not self.self_signed_ca: args.append("-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.self_signed_ca: p = subprocess.Popen(["/usr/bin/certutil", "-d", self.secdir, "-C", "-c", self.cacert_name, "-i", certreq_fname, "-o", cert_fname, "-m", next_serial(), "-v", self.valid_months, "-f", self.passwd_fname, "-1", "-5"], stdin=subprocess.PIPE, stdout=subprocess.PIPE) # Bah - this sucks, but I guess it isn't possible to fully # control this with command line arguments. # # What this is requesting is: # -1 (Create key usage extension) # 2 - Key encipherment # 9 - done # n - not critical # # -5 (Create netscape cert type extension) # 1 - SSL Server # 9 - done # n - not critical p.stdin.write("2\n9\nn\n1\n9\nn\n") p.wait() else: 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': 'caIPAserviceCert', '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() return def issue_signing_cert(self, certreq_fname, cert_fname): self.setup_cert_request() if self.self_signed_ca: p = subprocess.Popen(["/usr/bin/certutil", "-d", self.secdir, "-C", "-c", self.cacert_name, "-i", certreq_fname, "-o", cert_fname, "-m", next_serial(), "-v", self.valid_months, "-f", self.passwd_fname, "-1", "-5"], stdin=subprocess.PIPE, stdout=subprocess.PIPE) # Bah - this sucks, but I guess it isn't possible to fully # control this with command line arguments. # # What this is requesting is: # -1 (Create key usage extension) # 0 - Digital Signature # 5 - Cert signing key # 9 - done # n - not critical # # -5 (Create netscape cert type extension) # 3 - Object Signing # 9 - done # n - not critical p.stdin.write("0\n5\n9\nn\n3\n9\nn\n") p.wait() else: 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() return def add_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 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 = [] p = subprocess.Popen(["/usr/bin/certutil", "-d", self.secdir, "-O", "-n", nickname], stdout=subprocess.PIPE) chain = p.stdout.read() chain = chain.split("\n") for c in chain: m = re.match('\s*"(.*)" \[.*', c) if m: root_nicknames.append(m.groups()[0]) if len(root_nicknames) > 1: # If you pass in the name of a CA to get the chain it may only # return 1 (self-signed). Return that. try: root_nicknames.remove(nickname) except ValueError: # The nickname wasn't in the list pass # Try to work around a change in the F-11 certutil where untrusted # CA's are not shown in the chain. This will make a default IPA # server installable. if len(root_nicknames) == 0 and self.self_signed_ca: return [self.cacert_name] return root_nicknames def find_root_cert_from_pkcs12(self, pkcs12_fname, passwd_fname=None): """Given a PKCS#12 file, try to find any certificates that do not have a key. The assumption is that these are the root CAs. """ args = ["/usr/bin/pk12util", "-d", self.secdir, "-l", pkcs12_fname, "-k", passwd_fname] if passwd_fname: args = args + ["-w", passwd_fname] try: (stdout, stderr, returncode) = ipautil.run(args) except ipautil.CalledProcessError, e: if e.returncode == 17: raise RuntimeError("incorrect password") else: raise RuntimeError("unknown error using pkcs#12 file") lines = stdout.split('\n') # A simple state machine. # 1 = looking for "Certificate:" # 2 = looking for the Friendly name (nickname) nicknames = [] state = 1 for line in lines: if state == 2: m = re.match("\W+Friendly Name: (.*)", line) if m: nicknames.append( m.groups(0)[0]) state = 1 if line == "Certificate:": state = 2 return nicknames def trust_root_cert(self, root_nickname): if root_nickname is None: root_logger.debug("Unable to identify root certificate to trust. Continueing but things are likely to fail.") return if root_nickname[:7] == "Builtin": root_logger.debug("No need to add trust for built-in root CA's, skipping %s" % root_nickname) else: try: self.run_certutil(["-M", "-n", root_nickname, "-t", "CT,CT,"]) except ipautil.CalledProcessError, e: root_logger.error("Setting trust on %s failed" % root_nickname) def find_server_certs(self): p = subprocess.Popen(["/usr/bin/certutil", "-d", self.secdir, "-L"], stdout=subprocess.PIPE) certs = p.stdout.read() certs = certs.split("\n") server_certs = [] for cert in certs: fields = cert.split() if not len(fields): continue flags = fields[-1] if 'u' in flags: name = " ".join(fields[0:-1]) # NSS 3.12 added a header to the certutil output if name == "Certificate Nickname Trust": continue server_certs.append((name, flags)) return server_certs def import_pkcs12(self, pkcs12_fname, passwd_fname=None): args = ["/usr/bin/pk12util", "-d", self.secdir, "-i", pkcs12_fname, "-k", self.passwd_fname] if passwd_fname: args = args + ["-w", passwd_fname] try: ipautil.run(args) except ipautil.CalledProcessError, e: if e.returncode == 17: raise RuntimeError("incorrect password") else: raise RuntimeError("unknown error import pkcs#12 file") def export_pkcs12(self, pkcs12_fname, pkcs12_pwd_fname, nickname=None): if nickname is None: nickname = get_ca_nickname(api.env.realm) ipautil.run(["/usr/bin/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(["/usr/bin/openssl", "pkcs12", "-export", "-name", nickname, "-in", pem_fname, "-out", pkcs12_fname, "-passout", "file:" + pkcs12_pwd_fname]) def create_self_signed(self, passwd=None): self.create_noise_file() self.create_passwd_file(passwd) self.create_certdbs() self.create_ca_cert() self.export_ca_cert(self.cacert_name, True) self.create_pin_file() 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) def create_from_pkcs12(self, pkcs12_fname, pkcs12_pwd_fname, passwd=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. """ self.create_noise_file() self.create_passwd_file(passwd) self.create_certdbs() self.import_pkcs12(pkcs12_fname, pkcs12_pwd_fname) 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) # We only handle one server cert nickname = server_certs[0][0] ca_names = self.find_root_cert_from_pkcs12(pkcs12_fname, pkcs12_pwd_fname) if len(ca_names) == 0: raise RuntimeError("Could not find a CA cert in %s" % pkcs12_fname) self.cacert_name = ca_names[0] for ca in ca_names: self.trust_root_cert(ca) self.create_pin_file() self.export_ca_cert(nickname, False) self.self_signed_ca=False # This file implies that we have our own self-signed CA. Ensure # that it no longer exists (from previous installs, for example). try: os.remove(CA_SERIALNO) except: pass def create_kdc_cert(self, nickname, hostname, destdir): """Create a new certificate with the spcial othername encoding needed by a KDC certificate. nickname: the CN name set in the certificate destdir: the location where cert and key are to be installed destdir will contain kdc.pem if the operation is successful """ reqcfg = "kdc_req.conf" extcfg = ipautil.SHARE_DIR + "kdc_extensions.template" key_fname = destdir + "/kdckey.pem" cert_fname = destdir + "/kdccert.pem" key_cert_fname = destdir + "/kdc.pem" # Setup the temp dir self.setup_cert_request() # Copy the CA password file because openssl apparently can't use # the same file twice within the same command and throws an error ca_pwd_file = self.reqdir + "pwdfile.txt" shutil.copyfile(self.passwd_fname, ca_pwd_file) # Extract the cacert.pem file used by openssl to sign the certs ipautil.run(["/usr/bin/openssl", "pkcs12", "-in", self.pk12_fname, "-passin", "file:" + self.passwd_fname, "-passout", "file:" + ca_pwd_file, "-out", "cacert.pem"]) # Create the kdc key ipautil.run(["/usr/bin/openssl", "genrsa", "-out", key_fname, "2048"]) # Prepare a simple cert request req_dict = dict(PASSWORD=self.gen_password(), SUBJBASE=self.subject_base, CERTNAME=DN(('CN', nickname))) req_template = ipautil.SHARE_DIR + reqcfg + ".template" conf = ipautil.template_file(req_template, req_dict) fd = open(reqcfg, "w+") fd.write(conf) fd.close() base = str(self.subject_base).replace(",", "/") esc_subject = DN(('CN', '%s/%s' % (nickname, base))) ipautil.run(["/usr/bin/openssl", "req", "-new", "-config", reqcfg, "-subj", str(esc_subject), "-key", key_fname, "-out", "kdc.req"]) # Finally, sign the cert using the extensions file to set the # special name ipautil.run(["/usr/bin/openssl", "x509", "-req", "-CA", "cacert.pem", "-extfile", extcfg, "-extensions", "kdc_cert", "-passin", "file:" + ca_pwd_file, "-set_serial", next_serial(), "-in", "kdc.req", "-out", cert_fname], env = { 'REALM':self.realm, 'HOST_FQDN':hostname }) # Merge key and cert in a single file fd = open(key_fname, "r") key = fd.read() fd.close() fd = open(cert_fname, "r") cert = fd.read() fd.close() fd = open(key_cert_fname, "w") fd.write(key) fd.write(cert) fd.close() os.unlink(key_fname) os.unlink(cert_fname) def install_pem_from_p12(self, p12_fname, p12_pwd_fname, pem_fname): ipautil.run(["/usr/bin/openssl", "pkcs12", "-nodes", "-in", p12_fname, "-out", pem_fname, "-passin", "file:" + p12_pwd_fname]) def backup_files(self): self.fstore.backup_file(self.noise_fname) self.fstore.backup_file(self.passwd_fname) self.fstore.backup_file(self.certdb_fname) self.fstore.backup_file(self.keydb_fname) self.fstore.backup_file(self.secmod_fname) self.fstore.backup_file(self.cacert_fname) self.fstore.backup_file(self.pk12_fname) self.fstore.backup_file(self.pin_fname) self.fstore.backup_file(self.certreq_fname) self.fstore.backup_file(self.certder_fname) def publish_ca_cert(self, location): shutil.copy(self.cacert_fname, location) os.chmod(location, 0444)