Changeset 3df9b33 for fedd/federation

Timestamp:

Oct 6, 2011 5:56:31 PM (13 years ago)

Author:

Ted Faber <faber@…>

Branches:

compt_changes, info-ops, master

Children:

9bde415

Parents:

b6a6206

Message:

fedd-generated SEER certs and distribution (initial implementation,
untested) addresses #33

Location:

fedd/federation

Files:

• emulab_access.py (modified) (1 diff)
• experiment_control.py (modified) (8 diffs)

fedd/federation/emulab_access.py

@@ -925 +925 @@
         allocation log bound to the state log variable as well. 
         """
-        configs = set(('hosts', 'ssh_pubkey', 'ssh_secretkey'))
+        configs = ('hosts', 'ssh_pubkey', 'ssh_secretkey', 
+                'seer_ca_pem', 'seer_node_pem')
         ename = None
         pubkey_base = None

fedd/federation/experiment_control.py

@@ -13 +13 @@
 import signal
 import time
+
+import os.path
 
 import traceback
@@ -551 +553 @@
                     "Cannot generate nonce ssh keys.  %s return code %d" \
                             % (self.ssh_keygen, rv))
+
+    def generate_seer_certs(self, destdir):
+        '''
+        Create a SEER ca cert and a node cert in destdir/ca.pem and
+        destdir/node.pem respectively.  These will be distributed throughout
+        the federated experiment.  This routine reports errors via
+        service_errors.
+        '''
+        openssl = '/usr/bin/openssl'
+        # All the filenames and parameters we need for openssl calls below
+        ca_serial =os.path.join(destdir, 'ca.serial') 
+        ca_key =os.path.join(destdir, 'ca.key') 
+        ca_pem = os.path.join(destdir, 'ca.pem')
+        node_key =os.path.join(destdir, 'node.key') 
+        node_pem = os.path.join(destdir, 'node.pem')
+        node_req = os.path.join(destdir, 'node.req')
+        node_signed = os.path.join(destdir, 'node.signed')
+        days = '%s' % (3600 * 24 * 365 * 10)
+
+        try:
+            # init a serial number for the openssl calls
+            f = open(ca_serial, 'w')
+            print >>f, '%s' % random.randint(0, 0xffffffff)
+            f.close()
+
+            # Sequence of calls to create a CA key, create a ca cert, create a
+            # node key, node signing request, and finally a signed node
+            # certificate.
+            sequence = (
+                    (openssl, 'genrsa', '-out', ca_key, '1024'),
+                    (openssl, 'req', '-new', '-x509', '-key', ca_key, '-out', 
+                        ca_pem, '-days', days, '-subj', 
+                        '/C=US/ST=CA/O=DETER/OU=fedd/CN=CA' ),
+                    (openssl, 'genrsa', '-out', node_key, '1024'),
+                    (openssl, 'req', '-new', '-key', node_key, '-out', 
+                        node_req, '-days', days, '-subj', 
+                        '/C=US/ST=CA/O=DETER/OU=fedd/CN=node' ),
+                    (openssl, 'x509', '-CA', ca_pem, '-CAkey', ca_key, 
+                        '-CAserial', ca_serial, '-req', '-in', node_req, 
+                        '-out', node_signed, '-days', days),
+                )
+            # Do all that stuff; bail if there's an error, and push all the
+            # output to dev/null.
+            for cmd in sequence:
+                trace = open("/dev/null", "w")
+                rv = call(cmd, stdout=trace, stderr=trace, close_fds=True)
+                if rv != 0:
+                    raise service_error(service_error.internal, 
+                            "Cannot generate SEER certs.  %s return code %d" \
+                                    % (' '.join(cmd), rv))
+            # Concatinate the node key and signed certificate into node.pem
+            f = open(node_pem, 'w')
+            for comp in (node_signed, node_key):
+                g = open(comp, 'r')
+                f.write(g.read))
+                g.close()
+            f.close()
+
+            # Throw out intermediaries.
+            for fn in (ca_serial, ca_key, node_key, node_req, node_signed):
+                os.unlink(fn)
+
+        except EnvironmentError, e:
+            # Any difficulties with the file system wind up here
+            raise service_error(service_error.internal,
+                    "File error on  %s while creating SEER certs: %s" % \
+                            (e.filename, e.strerror))
+
+
 
     def gentopo(self, str):
@@ -1692 +1763 @@
         testbed to lists of federated_service objects.  The first lists all
         exporters of services, and the second all exporters of services that
-        need control portals int the experiment.
+        need control portals in the experiment.
         """
         masters = { }
@@ -1733 +1804 @@
     def generate_keys_and_hosts(self, tmpdir, expid, hosts, tbparams):
         """
-        Create the ssh keys necessary for interconnecting the potral nodes and
+        Create the ssh keys necessary for interconnecting the portal nodes and
         the global hosts file for letting each segment know about the IP
         addresses in play.  Save these into the repo.  Add attributes to the
         autorizer allowing access controllers to download them and return a set
-        of attributes that inform the segments where to find this stuff.  Mau
+        of attributes that inform the segments where to find this stuff.  May
         raise service_errors in if there are problems.
         """
         gw_pubkey_base = "fed.%s.pub" % self.ssh_type
         gw_secretkey_base = "fed.%s" % self.ssh_type
-        gw_pubkey = tmpdir + "/keys/" + gw_pubkey_base
-        gw_secretkey = tmpdir + "/keys/" + gw_secretkey_base
+        keydir = os.path.join(tmpdir, 'keys')
+        gw_pubkey = os.path.join(keydir, gw_pubkey_base)
+        gw_secretkey = os.path.join(keydir, gw_secretkey_base)
 
         try:
@@ -1751 +1823 @@
                     "Bad key type (%s)" % self.ssh_type)
 
+        self.generate_seer_certs(keydir)
 
         # Copy configuration files into the remote file store
@@ -1770 +1843 @@
                     "Cannot write hosts file: %s" % e)
         try:
-            copy_file("%s" % gw_pubkey, "%s/%s" % \
-                    (configdir, gw_pubkey_base))
-            copy_file("%s" % gw_secretkey, "%s/%s" % \
-                    (configdir, gw_secretkey_base))
+            copy_file(gw_pubkey, os.path.join(configdir, gw_pubkey_base))
+            copy_file(gw_secretkey, os.path.join(configdir, gw_secretkey_base))
+            copy_file(os.path.join(keydir, 'ca.pem'), 
+                    os.path.join(configdir, 'ca.pem'))
+            copy_file(os.path.join(keydir, 'node.pem'), 
+                    os.path.join(configdir, 'node.pem'))
         except EnvironmentError, e:
             raise service_error(service_error.internal, 
@@ -1784 +1859 @@
             (tbparams[tb]['allocID']['fedid'], "%s/%s" % (configpath, f)) \
                     for tb in tbparams.keys() \
-                        for f in ("hosts", gw_secretkey_base, gw_pubkey_base)]))
+                        for f in ("hosts", 'ca.pem', 'node.pem', 
+                            gw_secretkey_base, gw_pubkey_base)]))
 
         attrs = [ 
@@ -1801 +1877 @@
                     'value': '%s/%s/config/hosts' % \
                             (self.repo_url, expid)
+                },
+                {
+                    'attribute': 'seer_ca_pem', 
+                    'value': '%s/%s/config/%s' % \
+                            (self.repo_url, expid, 'ca.pem')
+                },
+                {
+                    'attribute': 'seer_node_pem', 
+                    'value': '%s/%s/config/%s' % \
+                            (self.repo_url, expid, 'node.pem')
                 },
             ]