Have certmonger track the initial Apache and 389-ds server certs.

We don't use certmonger to get certificates during installation because
of the chicken-and-egg problem. This means that the IPA web and ldap
certs aren't being tracked for renewal.

This requires some manual changes to the certmonger request files once
tracking has begun because it doesn't store a subject or principal template
when a cert is added via start-tracking.

This also required some changes to the cert command plugin to allow a
host to execute calls against its own service certs.

ticket 67

1 files changed, 152 insertions, 0 deletions

diff --git a/ipaserver/install/certmonger.py b/ipaserver/install/certmonger.py
new file mode 100644
index 00000000..bb56c2ab
--- /dev/null
+++ b/ipaserver/install/certmonger.py
@@ -0,0 +1,152 @@
+# 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)