Reuse credentials as fixture / linelength fixes for readability

README.md

@@ -0,0 +1,3 @@
+[![pipeline status](https://gitlab.niet.verweg.com/ruben/jail2ban-pf/badges/main/pipeline.svg)](https://gitlab.niet.verweg.com/ruben/jail2ban-pf/-/commits/main)
+[![coverage report](https://gitlab.niet.verweg.com/ruben/jail2ban-pf/badges/main/coverage.svg)](https://gitlab.niet.verweg.com/ruben/jail2ban-pf/-/commits/main)
+

jail2ban/__init__.py

@@ -77,7 +77,7 @@ def create_app():
                 ])
             res = pfctl_cfg_write(f'f2b-jail/{remote_user}',
                                   b'\n'.join(cfg) + b'\n')
-        elif request.method == 'DELETE':
+        else:  # 'DELETE':
             cfg = [cfg_line for cfg_line in cfg
                    if cfg_line.find(bytes(f'<f2b-{name}>', 'ascii')) == -1]
             res = pfctl_cfg_write(f'f2b-jail/{remote_user}',
@@ -110,7 +110,7 @@ def create_app():
                                  table=f'f2b-{name}',
                                  operation='add',
                                  value=str(ip))
-        elif request.method == 'DELETE':
+        else:  # 'DELETE':
             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}',
@@ -139,6 +139,14 @@ def create_app():
         app.logger.fatal(error)
         return jsonify({'error': str(error)}), 500
 
+    @app.errorhandler(FileNotFoundError)
+    def filenotfound_err(error):
+        '''
+        Show a json parsable error if the value is illegal
+        '''
+        app.logger.fatal(error)
+        return jsonify({'error': str(error)}), 500
+
     @auth.error_handler
     def auth_error():
         app.logger.error('Access Denied')

jail2ban/auth.py

@@ -1,18 +1,15 @@
-from flask import current_app, g
-import os
+from flask import current_app
 
 
 def get_users():
-    if 'users' not in g:
-        users = {}
-        authfile = current_app.config['AUTHFILE']
+    users = {}
+    authfile = current_app.config['AUTHFILE']
 
-        current_app.logger.debug('Reading %s for users', authfile)
+    current_app.logger.debug('Reading %s for users', authfile)
 
-        with current_app.open_resource(os.path.join("..",
-                                                    authfile)) as f:
-            for entry in f:
-                users.update({tuple(entry.decode('ascii').strip().split(':', 1))})
-            g.users = users
-    current_app.logger.debug(g.users)
-    return g.users
+    with current_app.open_resource(authfile) as f:
+        for entry in f:
+            users.update({
+                tuple(entry.decode('ascii').strip().split(':', 1))})
+    current_app.logger.debug(users)
+    return users

tests/conftest.py

@@ -1,4 +1,5 @@
 import pytest
+import base64
 from jail2ban import create_app
 
 
@@ -8,7 +9,7 @@ def app():
     app.config.update({
         "TESTING": True,
         "SECRET_KEY": 'Testing',
-        "AUTHFILE": 'tests/users-test.txt'
+        "AUTHFILE": '../tests/users-test.txt'
     })
 
     # other setup can go here
@@ -26,3 +27,8 @@ def client(app):
 @pytest.fixture()
 def runner(app):
     return app.test_cli_runner()
+
+
+@pytest.fixture()
+def valid_credentials():
+    return base64.b64encode(b"test.example.com:testpassword").decode("utf-8")

tests/test_ban.py

@@ -1,8 +1,7 @@
-import base64
 from types import SimpleNamespace
 
 
-def test_ban_ipv6(client, mocker):
+def test_ban_ipv6(client, mocker, valid_credentials):
     def noop():
         pass
     run_res = SimpleNamespace()
@@ -13,16 +12,16 @@ def test_ban_ipv6(client, mocker):
 
     mocker.patch('jail2ban.pfctl.run', return_value=run_res)
 
-    valid_credentials = base64.b64encode(b"test.example.com:testpassword").decode("utf-8")
     json_payload = {"name": "sshd", "ip": "2001:db8::abad:cafe"}
     response = client.put("/ban",
                           json=json_payload,
-                          headers={"Authorization": "Basic " + valid_credentials})
+                          headers={"Authorization":
+                                   "Basic " + valid_credentials})
 
     assert response.json['operation'] == 'add'
 
 
-def test_ban_ipv4(client, mocker):
+def test_ban_ipv4(client, mocker, valid_credentials):
     def noop():
         pass
     run_res = SimpleNamespace()
@@ -33,15 +32,16 @@ def test_ban_ipv4(client, mocker):
 
     mocker.patch('jail2ban.pfctl.run', return_value=run_res)
 
-    valid_credentials = base64.b64encode(b"test.example.com:testpassword").decode("utf-8")
     json_payload = {"name": "sshd", "ip": "192.0.2.42"}
     response = client.put("/ban",
                           json=json_payload,
-                          headers={"Authorization": "Basic " + valid_credentials})
+                          headers={"Authorization":
+                                   "Basic " + valid_credentials})
 
     assert response.json['operation'] == 'add'
 
-def test_ban_invalid(client, mocker):
+
+def test_ban_invalid(client, mocker, valid_credentials):
     def noop():
         pass
     run_res = SimpleNamespace()
@@ -52,16 +52,17 @@ def test_ban_invalid(client, mocker):
 
     mocker.patch('jail2ban.pfctl.run', return_value=run_res)
 
-    valid_credentials = base64.b64encode(b"test.example.com:testpassword").decode("utf-8")
     json_payload = {"name": "sshd", "ip": "not:an::addr:ess"}
     response = client.put("/ban",
                           json=json_payload,
-                          headers={"Authorization": "Basic " + valid_credentials})
+                          headers={"Authorization":
+                                   "Basic " + valid_credentials})
 
-    assert response.json['error'] == "'not:an::addr:ess' does not appear to be an IPv4 or IPv6 address"
+    assert response.json['error'] == "'not:an::addr:ess' does not " \
+                                     "appear to be an IPv4 or IPv6 address"
 
 
-def test_unban_ipv6(client, mocker):
+def test_unban_ipv6(client, mocker, valid_credentials):
     def noop():
         pass
     run_res = SimpleNamespace()
@@ -72,16 +73,16 @@ def test_unban_ipv6(client, mocker):
 
     mocker.patch('jail2ban.pfctl.run', return_value=run_res)
 
-    valid_credentials = base64.b64encode(b"test.example.com:testpassword").decode("utf-8")
     json_payload = {"name": "sshd", "ip": "2001:db8::abad:cafe"}
     response = client.delete("/ban",
                              json=json_payload,
-                             headers={"Authorization": "Basic " + valid_credentials})
+                             headers={"Authorization":
+                                      "Basic " + valid_credentials})
 
     assert response.json['operation'] == 'delete'
 
 
-def test_unban_ipv4(client, mocker):
+def test_unban_ipv4(client, mocker, valid_credentials):
     def noop():
         pass
     run_res = SimpleNamespace()
@@ -92,10 +93,10 @@ def test_unban_ipv4(client, mocker):
 
     mocker.patch('jail2ban.pfctl.run', return_value=run_res)
 
-    valid_credentials = base64.b64encode(b"test.example.com:testpassword").decode("utf-8")
     json_payload = {"name": "sshd", "ip": "192.0.2.42"}
     response = client.delete("/ban",
-                          json=json_payload,
-                          headers={"Authorization": "Basic " + valid_credentials})
+                             json=json_payload,
+                             headers={"Authorization":
+                                      "Basic " + valid_credentials})
 
     assert response.json['operation'] == 'delete'

tests/test_flush.py

@@ -1,9 +1,8 @@
-import base64
 from types import SimpleNamespace
 from subprocess import CalledProcessError
 
 
-def test_flush(client, mocker):
+def test_flush(client, mocker, valid_credentials):
     def noop():
         pass
     run_res = SimpleNamespace()
@@ -14,25 +13,65 @@ def test_flush(client, mocker):
 
     mocker.patch('jail2ban.pfctl.run', return_value=run_res)
 
-    valid_credentials = base64.b64encode(b"test.example.com:testpassword").decode("utf-8")
     name = 'sshd'
     response = client.get(f"/flush/{name}",
-                          headers={"Authorization": "Basic " + valid_credentials})
+                          headers={"Authorization":
+                                   "Basic " + valid_credentials})
 
     assert response.json['operation'] == 'flush'
 
 
-def test_flush_nonexistent(client, mocker):
+def test_flush_nonexistent(client, mocker, valid_credentials):
 
-    cmd = ['/usr/local/bin/sudo', '/sbin/pfctl', '-a', 'some/anchor', '-t', 'nonexistent', '-T', 'flush']
+    cmd = ['/usr/local/bin/sudo',
+           '/sbin/pfctl', '-a', 'some/anchor',
+           '-t', 'nonexistent', '-T', 'flush']
+
+    side_effect = CalledProcessError(255, cmd, output=b'',
+                                     stderr=b'pfctl: Table does not exist')
 
     mocker.patch('jail2ban.pfctl.run',
-                 side_effect=CalledProcessError(255, cmd, output=b'',
-                                                stderr=b'pfctl: Table does not exist'))
+                 side_effect=side_effect)
 
-    valid_credentials = base64.b64encode(b"test.example.com:testpassword").decode("utf-8")
     name = 'nonexistent'
     response = client.get(f"/flush/{name}",
-                          headers={"Authorization": "Basic " + valid_credentials})
+                          headers={"Authorization":
+                                   "Basic " + valid_credentials})
 
     assert 'error' in response.json
+
+
+def test_wrong_method(client, mocker, valid_credentials):
+
+    cmd = ['/usr/local/bin/sudo',
+           '/sbin/pfctl', '-a', 'some/anchor',
+           '-t', 'nonexistent', '-T', 'flush']
+
+    side_effect = CalledProcessError(255, cmd, output=b'',
+                                     stderr=b'pfctl: Table does not exist')
+
+    mocker.patch('jail2ban.pfctl.run',
+                 side_effect=side_effect)
+
+    name = 'nonexistent'
+    response = client.put(f"/flush/{name}",
+                          headers={"Authorization":
+                                   "Basic " + valid_credentials})
+
+    assert response.status_code == 405
+
+
+def test_filenotfound(app, mocker, valid_credentials):
+
+    app.config.update({
+        "AUTHFILE": '../tests/nonexistent-users-test.txt'
+    })
+
+    client = app.test_client()
+
+    name = 'nonexistent'
+    response = client.get(f"/flush/{name}",
+                          headers={"Authorization":
+                                   "Basic " + valid_credentials})
+
+    assert response.status_code == 500

tests/test_register.py

@@ -1,4 +1,3 @@
-import base64
 from subprocess import CompletedProcess
 
 pfctl_stdout_lines = b'''
@@ -7,7 +6,12 @@ block drop quick proto tcp from <f2b-sendmail-auth> to any port = smtps
 block drop quick proto tcp from <f2b-sendmail-auth> to any port = smtp
 block drop quick proto tcp from <f2b-sshd> to any port = ssh
 block drop quick proto tcp from <f2b-recidive> to any
-'''
+'''.strip() + b'\n'
+
+pfctl_stdout_lines_scratch = b'table <f2b-dovecot> persist counters\n' \
+                             b'block quick proto tcp from <f2b-dovecot>' \
+                             b' to any port ' \
+                             b'{pop3,pop3s,imap,imaps,submission,465,sieve}\n'
 
 
 def test_register_unauth(client):
@@ -19,7 +23,7 @@ def test_register_unauth(client):
     assert response.json['error'] == 'Access Denied'
 
 
-def test_register_valid(client, mocker):
+def test_unregister_valid(client, mocker, valid_credentials):
     def noop():
         pass
     run_res = CompletedProcess(args=['true'], returncode=0)
@@ -28,40 +32,67 @@ def test_register_valid(client, mocker):
 
     mocker.patch('jail2ban.pfctl.run', return_value=run_res)
 
-    valid_credentials = base64.b64encode(b"test.example.com:testpassword").decode("utf-8")
     json_payload = {"port":
                     "any port {pop3,pop3s,imap,imaps,submission,465,sieve}",
                     "name": "dovecot", "protocol": "tcp"}
 
     response = client.delete("/register",
                              json=json_payload,
-                             headers={"Authorization": "Basic " + valid_credentials})
+                             headers={"Authorization":
+                                      "Basic " + valid_credentials})
 
     assert response.json['action'] == 'stop'
 
 
-def test_unregister_valid(client, mocker):
+def test_register_valid(client, mocker, valid_credentials):
     def noop():
         pass
     run_res = CompletedProcess(args=['true'], returncode=0)
     run_res.stdout = pfctl_stdout_lines
     run_res.check_returncode = noop
 
-    mocker.patch('jail2ban.pfctl.run', return_value=run_res)
+    pfctl_run = mocker.patch('jail2ban.pfctl.run', return_value=run_res)
 
-    valid_credentials = base64.b64encode(b"test.example.com:testpassword").decode("utf-8")
     json_payload = {"port":
                     "any port {pop3,pop3s,imap,imaps,submission,465,sieve}",
                     "name": "dovecot", "protocol": "tcp"}
 
     response = client.put("/register",
                           json=json_payload,
-                          headers={"Authorization": "Basic " + valid_credentials})
+                          headers={"Authorization":
+                                   "Basic " + valid_credentials})
+
+    pfctl_run_input_arg = pfctl_run.call_args_list[1][1]['input']
+    for existing_line in pfctl_stdout_lines.splitlines():
+        assert existing_line in pfctl_run_input_arg.splitlines()
 
     assert response.json['action'] == 'start'
 
 
-def test_register_invalid(client, mocker):
+def test_register_valid_from_scratch(client, mocker, valid_credentials):
+    def noop():
+        pass
+    run_res = CompletedProcess(args=['true'], returncode=0)
+    run_res.stdout = b''
+    run_res.check_returncode = noop
+
+    pfctl_run = mocker.patch('jail2ban.pfctl.run', return_value=run_res)
+
+    json_payload = {"port":
+                    "any port {pop3,pop3s,imap,imaps,submission,465,sieve}",
+                    "name": "dovecot", "protocol": "tcp"}
+
+    response = client.put("/register",
+                          json=json_payload,
+                          headers={"Authorization":
+                                   "Basic " + valid_credentials})
+
+    pfctl_run_input_arg = pfctl_run.call_args_list[1][1]['input']
+    assert pfctl_run_input_arg == pfctl_stdout_lines_scratch
+    assert response.json['action'] == 'start'
+
+
+def test_register_invalid(client, mocker, valid_credentials):
     def noop():
         pass
     run_res = CompletedProcess(args=['true'], returncode=0)
@@ -70,13 +101,13 @@ def test_register_invalid(client, mocker):
 
     mocker.patch('jail2ban.pfctl.run', return_value=run_res)
 
-    valid_credentials = base64.b64encode(b"test.example.com:testpassword").decode("utf-8")
     json_payload = {"port":
                     "not a pf statement",
                     "name": "dovecot", "protocol": "tcp"}
 
     response = client.put("/register",
                           json=json_payload,
-                          headers={"Authorization": "Basic " + valid_credentials})
+                          headers={"Authorization":
+                                   "Basic " + valid_credentials})
 
     assert response.json['error'] == '"not a pf statement" is tainted'