service https: T1585: add support for letsencrypt certificates

1 files changed, 119 insertions, 0 deletions

diff --git a/src/conf_mode/le_cert.py b/src/conf_mode/le_cert.py
new file mode 100755
index 000000000..c657098e1
--- /dev/null
+++ b/src/conf_mode/le_cert.py
@@ -0,0 +1,119 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2019 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 sys
+import os
+import subprocess
+
+import vyos.defaults
+from vyos.config import Config
+from vyos import ConfigError
+
+vyos_conf_scripts_dir = vyos.defaults.directories['conf_mode']
+
+dependencies = [
+    'https.py',
+]
+
+def request_certbot(cert):
+    email = cert.get('email')
+    if email is not None:
+        email_flag = '-m {0}'.format(email)
+    else:
+        email_flag = ''
+
+    domains = cert.get('domains')
+    if domains is not None:
+        domain_flag = '-d ' + ' -d '.join(domains)
+    else:
+        domain_flag = ''
+
+    certbot_cmd = 'certbot certonly -n --nginx --agree-tos --no-eff-email --expand {0} {1}'.format(email_flag, domain_flag)
+
+    completed = subprocess.run(certbot_cmd, shell=True)
+
+    return completed.returncode
+
+def get_config():
+    conf = Config()
+    if not conf.exists('service https certificates certbot'):
+        return None
+    else:
+        conf.set_level('service https certificates certbot')
+
+    cert = {}
+
+    if conf.exists('domain-name'):
+        cert['domains'] = conf.return_values('domain-name')
+
+    if conf.exists('email'):
+        cert['email'] = conf.return_value('email')
+
+    return cert
+
+def verify(cert):
+    if cert is None:
+        return None
+
+    if 'domains' not in cert:
+        raise ConfigError("At least one domain name is required to"
+                          " request a letsencrypt certificate.")
+
+    if 'email' not in cert:
+        raise ConfigError("An email address is required to request"
+                          " a letsencrypt certificate.")
+
+def generate(cert):
+    if cert is None:
+        return None
+
+    # certbot will attempt to reload nginx, even with 'certonly';
+    # start nginx if not active
+    ret = os.system('systemctl is-active --quiet nginx.ervice')
+    if ret:
+        os.system('sudo systemctl start nginx.service')
+
+    ret = request_certbot(cert)
+    if ret:
+        raise ConfigError("The certbot request failed for the"
+                          " specified domains.")
+
+def apply(cert):
+    if cert is not None:
+        os.system('sudo systemctl restart certbot.timer')
+    else:
+        os.system('sudo systemctl stop certbot.timer')
+        return None
+
+    for dep in dependencies:
+        cmd = '{0}/{1}'.format(vyos_conf_scripts_dir, dep)
+        try:
+            subprocess.check_call(cmd, shell=True)
+        except subprocess.CalledProcessError as err:
+            raise ConfigError(str(err))
+
+if __name__ == '__main__':
+    try:
+        c = get_config()
+        verify(c)
+        generate(c)
+        apply(c)
+    except ConfigError as e:
+        print(e)
+        sys.exit(1)
+