1 files changed, 94 insertions, 0 deletions
diff --git a/src/conf_mode/ssh.py b/src/conf_mode/ssh.py
new file mode 100755
index 000000000..7b262565a
--- /dev/null
+++ b/src/conf_mode/ssh.py
@@ -0,0 +1,94 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2018-2020 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 netifaces import interfaces
+from sys import exit
+
+from vyos.config import Config
+from vyos.configdict import dict_merge
+from vyos import ConfigError
+from vyos.util import call
+from vyos.template import render
+from vyos.xml import defaults
+from vyos import airbag
+airbag.enable()
+
+config_file = r'/run/ssh/sshd_config'
+systemd_override = r'/etc/systemd/system/ssh.service.d/override.conf'
+
+def get_config():
+    conf = Config()
+    base = ['service', 'ssh']
+    if not conf.exists(base):
+        return None
+
+    ssh = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True)
+    # We have gathered the dict representation of the CLI, but there are default
+    # options which we need to update into the dictionary retrived.
+    default_values = defaults(base)
+    ssh = dict_merge(default_values, ssh)
+    # pass config file path - used in override template
+    ssh['config_file'] = config_file
+
+    return ssh
+
+def verify(ssh):
+    if not ssh:
+        return None
+
+    if 'vrf' in ssh.keys() and ssh['vrf'] not in interfaces():
+        raise ConfigError('VRF "{vrf}" does not exist'.format(**ssh))
+
+    return None
+
+def generate(ssh):
+    if not ssh:
+        if os.path.isfile(config_file):
+            os.unlink(config_file)
+        if os.path.isfile(systemd_override):
+            os.unlink(systemd_override)
+
+        return None
+
+    render(config_file, 'ssh/sshd_config.tmpl', ssh, trim_blocks=True)
+    render(systemd_override, 'ssh/override.conf.tmpl', ssh, trim_blocks=True)
+
+    return None
+
+def apply(ssh):
+    if not ssh:
+        # SSH access is removed in the commit
+        call('systemctl stop ssh.service')
+
+    # Reload systemd manager configuration
+    call('systemctl daemon-reload')
+
+    if ssh:
+        call('systemctl restart ssh.service')
+
+    return None
+
+if __name__ == '__main__':
+    try:
+        c = get_config()
+        verify(c)
+        generate(c)
+        apply(c)
+    except ConfigError as e:
+        print(e)
+        exit(1)