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+# Authors: Rob Crittenden <rcritten@redhat.com>
+#
+# Copyright (C) 2010 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; version 2 only
+#
+# 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, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+
+# Some certmonger functions, mostly around updating the request file.
+# This is used so we can add tracking to the Apache and 389-ds
+# server certificates created during the IPA server installation.
+
+import os
+import re
+import time
+from ipapython import ipautil
+
+REQUEST_DIR='/var/lib/certmonger/requests/'
+
+def find_request_value(filename, directive):
+ """
+ Return a value from a certmonger request file for the requested directive
+
+ It tries to do this a number of times because sometimes there is a delay
+ when ipa-getcert returns and the file is fully updated, particularly
+ when doing a request. Genrerating a CSR is fast but not instantaneous.
+ """
+ tries = 1
+ value = None
+ found = False
+ while value is None and tries <= 5:
+ tries=tries + 1
+ time.sleep(1)
+ fp = open(filename, 'r')
+ lines = fp.readlines()
+ fp.close()
+
+ for line in lines:
+ if found:
+ # A value can span multiple lines. If it does then it has a
+ # leading space.
+ if not line.startswith(' '):
+ # We hit the next directive, return now
+ return value
+ else:
+ value = value + line[1:]
+ else:
+ if line.startswith(directive + '='):
+ found = True
+ value = line[len(directive)+1:]
+
+ return value
+
+def get_request_value(request_id, directive):
+ """
+ There is no guarantee that the request_id will match the filename
+ in the certmonger requests directory, so open each one to find the
+ request_id.
+ """
+ fileList=os.listdir(REQUEST_DIR)
+ for file in fileList:
+ value = find_request_value('%s/%s' % (REQUEST_DIR, file), 'id')
+ if value is not None and value.rstrip() == request_id:
+ return find_request_value('%s/%s' % (REQUEST_DIR, file), directive)
+
+ return None
+
+def add_request_value(request_id, directive, value):
+ """
+ Add a new directive to a certmonger request file.
+
+ The certmonger service MUST be stopped in order for this to work.
+ """
+ fileList=os.listdir(REQUEST_DIR)
+ for file in fileList:
+ id = find_request_value('%s/%s' % (REQUEST_DIR, file), 'id')
+ if id is not None and id.rstrip() == request_id:
+ current_value = find_request_value('%s/%s' % (REQUEST_DIR, file), directive)
+ if not current_value:
+ fp = open('%s/%s' % (REQUEST_DIR, file), 'a')
+ fp.write('%s=%s\n' % (directive, value))
+ fp.close()
+
+ return
+
+def add_principal(request_id, principal):
+ """
+ In order for a certmonger request to be renwable it needs a principal.
+
+ When an existing certificate is added via start-tracking it won't have
+ a principal.
+ """
+ return add_request_value(request_id, 'template_principal', principal)
+
+def add_subject(request_id, subject):
+ """
+ In order for a certmonger request to be renwable it needs the subject
+ set in the request file.
+
+ When an existing certificate is added via start-tracking it won't have
+ a subject_template set.
+ """
+ return add_request_value(request_id, 'template_subject', subject)
+
+def request_cert(nssdb, nickname, subject, principal, passwd_fname=None):
+ """
+ Execute certmonger to request a server certificate
+ """
+ args = ['/usr/bin/ipa-getcert',
+ 'request',
+ '-d', nssdb,
+ '-n', nickname,
+ '-N', subject,
+ '-K', principal,
+ ]
+ if passwd_fname:
+ args.append('-p')
+ args.append(passwd_fname)
+ (stdout, stderr, returncode) = ipautil.run(args)
+ # FIXME: should be some error handling around this
+ m = re.match('New signing request "(\d+)" added', stdout)
+ request_id = m.group(1)
+ return request_id
+
+def stop_tracking(request_id):
+ """
+ Stop tracking the current request.
+
+ This assumes that the certmonger service is running.
+ """
+ args = ['/usr/bin/ipa-getcert',
+ 'stop-tracking',
+ '-i', request_id
+ ]
+ (stdout, stderr, returncode) = ipautil.run(args)
+
+if __name__ == '__main__':
+ request_id = request_cert("/etc/httpd/alias", "Test", "cn=tiger.example.com,O=IPA", "HTTP/tiger.example.com@EXAMPLE.COM")
+ csr = get_request_value(request_id, 'csr')
+ print csr
+ stop_tracking(request_id)