1 files changed, 130 insertions, 0 deletions
diff --git a/src/conf_mode/interfaces-macsec.py b/src/conf_mode/interfaces-macsec.py
new file mode 100755
index 000000000..ca15212d4
--- /dev/null
+++ b/src/conf_mode/interfaces-macsec.py
@@ -0,0 +1,130 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2020 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# 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 <http://www.gnu.org/licenses/>.
+
+import os
+
+from copy import deepcopy
+from sys import exit
+
+from vyos.config import Config
+from vyos.configdict import get_interface_dict
+from vyos.ifconfig import MACsecIf
+from vyos.template import render
+from vyos.util import call
+from vyos.configverify import verify_vrf
+from vyos.configverify import verify_address
+from vyos.configverify import verify_bridge_delete
+from vyos.configverify import verify_source_interface
+from vyos import ConfigError
+from vyos import airbag
+airbag.enable()
+
+# XXX: wpa_supplicant works on the source interface
+wpa_suppl_conf = '/run/wpa_supplicant/{source_interface}.conf'
+
+def get_config():
+    """
+    Retrive CLI config as dictionary. Dictionary can never be empty, as at least the
+    interface name will be added or a deleted flag
+    """
+    conf = Config()
+    base = ['interfaces', 'macsec']
+    macsec = get_interface_dict(conf, base)
+
+    # Check if interface has been removed
+    if 'deleted' in macsec:
+        source_interface = conf.return_effective_value(
+                base + ['source-interface'])
+        macsec.update({'source_interface': source_interface})
+
+    return macsec
+
+
+def verify(macsec):
+    if 'deleted' in macsec:
+        verify_bridge_delete(macsec)
+        return None
+
+    verify_source_interface(macsec)
+    verify_vrf(macsec)
+    verify_address(macsec)
+
+    if not (('security' in macsec) and
+            ('cipher' in macsec['security'])):
+        raise ConfigError(
+            'Cipher suite must be set for MACsec "{ifname}"'.format(**macsec))
+
+    if (('security' in macsec) and
+        ('encrypt' in macsec['security'])):
+        tmp = macsec.get('security')
+
+        if not (('mka' in tmp) and
+                ('cak' in tmp['mka']) and
+                ('ckn' in tmp['mka'])):
+            raise ConfigError('Missing mandatory MACsec security '
+                              'keys as encryption is enabled!')
+
+    return None
+
+
+def generate(macsec):
+    render(wpa_suppl_conf.format(**macsec),
+           'macsec/wpa_supplicant.conf.tmpl', macsec)
+    return None
+
+
+def apply(macsec):
+    # Remove macsec interface
+    if 'deleted' in macsec.keys():
+        call('systemctl stop wpa_supplicant-macsec@{source_interface}'
+             .format(**macsec))
+
+        MACsecIf(macsec['ifname']).remove()
+
+        # delete configuration on interface removal
+        if os.path.isfile(wpa_suppl_conf.format(**macsec)):
+            os.unlink(wpa_suppl_conf.format(**macsec))
+
+    else:
+        # MACsec interfaces require a configuration when they are added using
+        # iproute2. This static method will provide the configuration
+        # dictionary used by this class.
+
+        # XXX: subject of removal after completing T2653
+        conf = deepcopy(MACsecIf.get_config())
+        conf['source_interface'] = macsec['source_interface']
+        conf['security_cipher'] = macsec['security']['cipher']
+
+        # It is safe to "re-create" the interface always, there is a sanity
+        # check that the interface will only be create if its non existent
+        i = MACsecIf(macsec['ifname'], **conf)
+        i.update(macsec)
+
+        call('systemctl restart wpa_supplicant-macsec@{source_interface}'
+             .format(**macsec))
+
+    return None
+
+
+if __name__ == '__main__':
+    try:
+        c = get_config()
+        verify(c)
+        generate(c)
+        apply(c)
+    except ConfigError as e:
+        print(e)
+        exit(1)