.gitignore

@@ -1,7 +1,5 @@
 venv/
 
-*.sw?
-
 *.pyc
 __pycache__/
 

.pylintrc

@@ -1,2 +0,0 @@
-[TYPECHECK]
-generated-members=app.logger.*

jail2ban/__init__.py

@@ -1,16 +1,11 @@
-'''
-jail2ban, a remote fail2ban action plugin using OpenBSD pf(8)
-'''
-from ipaddress import ip_address
-import re
-from subprocess import CalledProcessError
-
 from flask import Flask, request, jsonify, current_app
 from flask_httpauth import HTTPBasicAuth
 from werkzeug.security import check_password_hash
-
+from ipaddress import ip_address
+import re
 from jail2ban.pfctl import pfctl_table_op, pfctl_cfg_read, pfctl_cfg_write
 from jail2ban.auth import get_users
+from subprocess import CalledProcessError
 
 
 auth = HTTPBasicAuth()
@@ -20,13 +15,6 @@ PAT_PORT = r'^any(?:\s+port\s+{\w+(?:,\w+)*})?$'
 PAT_PROT = r'^(?:tcp|udp)$'
 PAT_NAME = r'^[\w\-]+$'
 
-_PFCTL_TABLE_PAT = r'''\s+(?P<addr>\S+)\n
-\s+Cleared:\s+(?P<date>\S+\s+\S+\s+\d+\s+(?:\d{2}:){2}\d{2}\s+\d{4})\n
-\s+In/Block:\s+\[\s+Packets:\s+(?P<in_pckt_block>\d+)\s+Bytes:\s+(?P<in_bytes_block>\d+)\s+\]\n
-\s+In/Pass:\s+\[\s+Packets:\s+(?P<in_pckt_pass>\d+)\s+Bytes:\s+(?P<in_bytes_pass>\d+)\s+\]\n
-\s+Out/Block:\s+\[\s+Packets:\s+(?P<out_pckt_block>\d+)\s+Bytes:\s+(?P<out_bytes_block>\d+)\s+\]\n
-\s+Out/Pass:\s+\[\s+Packets:\s+(?P<out_pckt_pass>\d+)\s+Bytes:\s+(?P<out_bytes_pass>\d+)\s+\]'''
-
 
 def untaint(pattern, string):
     '''
@@ -35,13 +23,11 @@ def untaint(pattern, string):
     match = re.match(pattern, string)
     if match:
         return match.string
-    raise ValueError(f'"{string}" is tainted')
+    else:
+        raise ValueError(f'"{string}" is tainted')
 
 
 def create_app():
-    '''
-    Create wsgi application instance
-    '''
     app = Flask(__name__, instance_relative_config=True)
 
     # load the instance config, if it exists, when not testing
@@ -55,7 +41,6 @@ def create_app():
         if username in users and \
                 check_password_hash(users.get(username), password):
             return username
-        return None
 
     @app.route("/ping", methods=['GET'])
     @auth.login_required
@@ -81,36 +66,6 @@ def create_app():
                         'operation': 'flush',
                         'result': [x.decode('ascii') for x in res]})
 
-    @app.route("/list/<name>", methods=['GET'])
-    @auth.login_required
-    def list_table(name):
-        remote_user = auth.username()
-        name = untaint(PAT_NAME, name)
-        app.logger.info(f'Flushing table f2b-{name}'
-                        f' in anchor f2b-jail/{remote_user}')
-        reply = {'anchor': f'f2b-jail/{remote_user}',
-                        'table': f'f2b-{name}',
-                        'operation': 'list'}
-        try:
-            res = pfctl_table_op('f2b-jail/{remote_user}',
-                                 table='f2b-{name}',
-                                 operation='show',
-                                 verbose=True)
-        except CalledProcessError as err:
-            if err.stderr.find(b'pfctl: Table does not exist.') > 0:
-                res = []
-                reply.update({'error': f'\'{name}\' is not a known fail2ban jail'})
-            else:
-                raise err
-
-        result = [entry.groupdict() for entry in
-                  re.finditer(_PFCTL_TABLE_PAT,
-                              '\n'.join([x.decode('ascii') for x in res]),
-                              re.MULTILINE|re.VERBOSE)]
-        reply.update({'result': result})
-
-        return jsonify(reply), 200 if len(res) else 404
-
     @app.route("/register", methods=['PUT', 'DELETE'])
     @auth.login_required
     def register():
@@ -156,21 +111,21 @@ def create_app():
         data = request.get_json()
         # name / ip
         name = untaint(PAT_NAME, data['name'])
-        ip_addr = ip_address(data['ip'])
+        ip = ip_address(data['ip'])
         if request.method == 'PUT':
-            app.logger.info(f'Add {ip_addr} to f2b-{name}'
+            app.logger.info(f'Add {ip} to f2b-{name}'
                             f' in anchor f2b-jail/{remote_user}')
             res = pfctl_table_op(f'f2b-jail/{remote_user}',
                                  table=f'f2b-{name}',
                                  operation='add',
-                                 value=str(ip_addr))
+                                 value=str(ip))
         else:  # 'DELETE':
-            app.logger.info(f'Remove {ip_addr} from f2b-{name}'
+            app.logger.info(f'Remove {ip} from f2b-{name}'
                             f' in anchor f2b-jail/{remote_user}')
             res = pfctl_table_op(f'f2b-jail/{remote_user}',
                                  table=f'f2b-{name}',
                                  operation='delete',
-                                 value=str(ip_addr))
+                                 value=str(ip))
         return jsonify({'anchor': f'f2b-jail/{remote_user}',
                         'table': f'f2b-{name}',
                         'operation': 'add' if request.method == 'PUT'
@@ -191,8 +146,6 @@ def create_app():
         Show a json parsable error if the value is illegal
         '''
         app.logger.fatal(error)
-        app.logger.fatal('stdout: %s', error.stderr)
-        app.logger.fatal('stderr: %s', error.stderr)
         return jsonify({'error': str(error)}), 500
 
     @app.errorhandler(FileNotFoundError)

jail2ban/pfctl.py

@@ -1,16 +1,11 @@
-'''
-Lowlevel routines for calling the pf binary with passwordless sudo
-'''
 import logging
 from subprocess import run
 
 _SUDO = '/usr/local/bin/sudo'
 _PFCTL = '/sbin/pfctl'
 
+
 def pfctl_cfg_read(anchor):
-    '''
-    Read pf rules stored under a certain anchor
-    '''
     cmd = [_SUDO, _PFCTL, '-a', anchor, '-sr']
     logging.info('Running %s', cmd)
 
@@ -21,9 +16,6 @@ def pfctl_cfg_read(anchor):
 
 
 def pfctl_cfg_write(anchor, cfg):
-    '''
-    Write pf rules under a certain anchor
-    '''
     cmd = [_SUDO, _PFCTL, '-a', anchor, '-f-']
     logging.info('Running %s', cmd)
     logging.info('Config %s', cfg)
@@ -38,14 +30,10 @@ def pfctl_cfg_write(anchor, cfg):
 
 
 def pfctl_table_op(anchor, **kwargs):
-    '''
-    pf table operation
-    '''
     table = kwargs['table']
     operation = kwargs['operation']
     value = kwargs['value'] if 'value' in kwargs else None
-    verbose =  '-v' if 'verbose' in kwargs and kwargs['verbose'] else None
+    cmd = [_SUDO, _PFCTL, '-a', anchor, '-t', table, '-T', operation, value]
-    cmd = [_SUDO, _PFCTL, '-a', anchor, '-t', table, verbose, '-T', operation, value]
 
     logging.info('Running %s', cmd)
 

tests/test_list.py

@@ -1,140 +0,0 @@
-'''
-Tests for /list route
-'''
-from types import SimpleNamespace
-from subprocess import CalledProcessError
-
-
-_PF_TABLE_LIST = b'''   192.0.2.66
-        Cleared:     Sat Jan  7 12:50:36 2023
-        In/Block:    [ Packets: 0                  Bytes: 0                  ]
-        In/Pass:     [ Packets: 0                  Bytes: 0                  ]
-        Out/Block:   [ Packets: 0                  Bytes: 0                  ]
-        Out/Pass:    [ Packets: 0                  Bytes: 0                  ]
-   2001:db8::abad:cafe
-        Cleared:     Sat Jan  7 05:13:53 2023
-        In/Block:    [ Packets: 4                  Bytes: 240                ]
-        In/Pass:     [ Packets: 0                  Bytes: 0                  ]
-        Out/Block:   [ Packets: 0                  Bytes: 0                  ]
-        Out/Pass:    [ Packets: 0                  Bytes: 0                  ]
-   2001:db8::abad:f00d:cafe
-        Cleared:     Sat Jan  7 05:05:16 2023
-        In/Block:    [ Packets: 48                 Bytes: 2880               ]
-        In/Pass:     [ Packets: 0                  Bytes: 0                  ]
-        Out/Block:   [ Packets: 0                  Bytes: 0                  ]
-        Out/Pass:    [ Packets: 0                  Bytes: 0                  ]'''
-
-_LIST_RESULT = [{'addr': '192.0.2.66',
-  'date': 'Sat Jan  7 12:50:36 2023',
-  'in_pckt_block': '0',
-  'in_bytes_block': '0',
-  'in_pckt_pass': '0',
-  'in_bytes_pass': '0',
-  'out_pckt_block': '0',
-  'out_bytes_block': '0',
-  'out_pckt_pass': '0',
-  'out_bytes_pass': '0'},
- {'addr': '2001:db8::abad:cafe',
-  'date': 'Sat Jan  7 05:13:53 2023',
-  'in_pckt_block': '4',
-  'in_bytes_block': '240',
-  'in_pckt_pass': '0',
-  'in_bytes_pass': '0',
-  'out_pckt_block': '0',
-  'out_bytes_block': '0',
-  'out_pckt_pass': '0',
-  'out_bytes_pass': '0'},
- {'addr': '2001:db8::abad:f00d:cafe',
-  'date': 'Sat Jan  7 05:05:16 2023',
-  'in_pckt_block': '48',
-  'in_bytes_block': '2880',
-  'in_pckt_pass': '0',
-  'in_bytes_pass': '0',
-  'out_pckt_block': '0',
-  'out_bytes_block': '0',
-  'out_pckt_pass': '0',
-  'out_bytes_pass': '0'}]
-
-
-def test_list_single_table(client, mocker, valid_credentials):
-    '''
-    List a single pf table using the fail2ban jail name
-    '''
-
-    def noop():
-        pass
-
-    run_res = SimpleNamespace()
-    run_res.stdout = _PF_TABLE_LIST
-    run_res.stderr = b'No ALTQ support in kernel\nALTQ related functions disabled\n'
-    run_res.returncode = 0
-    run_res.check_returncode = noop
-
-    mocker.patch('jail2ban.pfctl.run', return_value=run_res)
-
-    response = client.get("/list/sshd",
-                          headers={"Authorization":
-                                   "Basic " + valid_credentials})
-
-    assert response.json['table'] == 'f2b-sshd'
-    assert response.json['result'] == _LIST_RESULT
-
-
-def test_list_nonexistent_table(client, mocker, valid_credentials):
-    '''
-    Test for nonexistent table. Should result in a 404 not found
-    '''
-    def noop():
-        pass
-
-    run_res = SimpleNamespace()
-    run_res.stdout = b''
-    run_res.stderr = b'No ALTQ support in kernel\nALTQ related functions disabled\n' \
-                     b'pfctl: Table does not exist.\n'
-    run_res.returncode = 255
-    run_res.check_returncode = noop
-
-    mocker.patch('jail2ban.pfctl.run',
-                 return_value=run_res,
-                 side_effect=CalledProcessError(run_res.returncode,
-                                                'foobar',
-                                                 output=run_res.stdout,
-                                                 stderr=run_res.stderr)
-                 )
-
-    response = client.get("/list/nonexistent",
-                          headers={"Authorization":
-                                   "Basic " + valid_credentials})
-
-    assert response.status_code == 404
-    assert response.json['error'] == "'nonexistent' is not " \
-                                     "a known fail2ban jail"
-
-def test_list_wrong_table_name(client, mocker, valid_credentials):
-    '''
-    Test for an wrong table name that lets pfctl fail. should result in a 500
-    '''
-    def noop():
-        pass
-
-    run_res = SimpleNamespace()
-    run_res.stdout = b''
-    run_res.stderr = b'No ALTQ support in kernel\nALTQ related functions disabled\n' \
-            b'pfctl: Invalid argument.\n'
-    run_res.returncode = 255
-    run_res.check_returncode = noop
-
-    mocker.patch('jail2ban.pfctl.run',
-                 return_value=run_res,
-                 side_effect=CalledProcessError(run_res.returncode,
-                                                'foobar',
-                                                 output=run_res.stdout,
-                                                 stderr=run_res.stderr)
-                 )
-
-    response = client.get("/list/notanerrorbuttestneedstofail",
-                          headers={"Authorization":
-                                   "Basic " + valid_credentials})
-
-    assert response.status_code == 500
-    assert response.json['error'] == "Command 'foobar' returned non-zero exit status 255."