From 937d3c3fa6290084346a8aa798166c912736fc81 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Mon, 13 Nov 2023 18:31:17 +0100
Subject: add role nginx/auth/whawty-sso

---
 roles/nginx/auth/whawty-sso/base/defaults/main.yml |  8 +++
 roles/nginx/auth/whawty-sso/base/tasks/main.yml    | 20 +++++++
 .../whawty-sso/base/templates/nginx.snippet.j2     | 19 +++++++
 .../base/templates/whawty-nginx-sso@.service.j2    | 31 +++++++++++
 .../nginx/auth/whawty-sso/login/defaults/main.yml  | 61 +++++++++++++++++++++
 .../nginx/auth/whawty-sso/login/handlers/main.yml  |  6 ++
 roles/nginx/auth/whawty-sso/login/tasks/main.yml   | 64 ++++++++++++++++++++++
 7 files changed, 209 insertions(+)
 create mode 100644 roles/nginx/auth/whawty-sso/base/defaults/main.yml
 create mode 100644 roles/nginx/auth/whawty-sso/base/tasks/main.yml
 create mode 100644 roles/nginx/auth/whawty-sso/base/templates/nginx.snippet.j2
 create mode 100644 roles/nginx/auth/whawty-sso/base/templates/whawty-nginx-sso@.service.j2
 create mode 100644 roles/nginx/auth/whawty-sso/login/defaults/main.yml
 create mode 100644 roles/nginx/auth/whawty-sso/login/handlers/main.yml
 create mode 100644 roles/nginx/auth/whawty-sso/login/tasks/main.yml

(limited to 'roles')

diff --git a/roles/nginx/auth/whawty-sso/base/defaults/main.yml b/roles/nginx/auth/whawty-sso/base/defaults/main.yml
new file mode 100644
index 00000000..62c3e318
--- /dev/null
+++ b/roles/nginx/auth/whawty-sso/base/defaults/main.yml
@@ -0,0 +1,8 @@
+---
+# whawty_nginx_sso_backends:
+#   example:
+#     port: 1234
+#     login_url: https://login.example.com/login
+#   foo:
+#     port: 2345
+#     login_url: https://login.foo.bar/login
diff --git a/roles/nginx/auth/whawty-sso/base/tasks/main.yml b/roles/nginx/auth/whawty-sso/base/tasks/main.yml
new file mode 100644
index 00000000..a410cfeb
--- /dev/null
+++ b/roles/nginx/auth/whawty-sso/base/tasks/main.yml
@@ -0,0 +1,20 @@
+---
+# TODO: create whawty-nginx-sso user?
+
+- name: install nginx-sso package
+  apt:
+    name: whawty-nginx-sso
+    state: present
+
+- name: generate nginx snippets
+  loop: "{{ whawty_nginx_sso_backends | dict2items }}"
+  loop_control:
+    label: "{{ item.key }}"
+  template:
+    src: nginx.snippet.j2
+    dest: "/etc/nginx/snippets/whawty-sso-{{ item.key }}.conf"
+
+- name: install systemd service unit
+  template:
+    src: whawty-nginx-sso@.service.j2
+    dest: /etc/systemd/system/whawty-nginx-sso@.service
diff --git a/roles/nginx/auth/whawty-sso/base/templates/nginx.snippet.j2 b/roles/nginx/auth/whawty-sso/base/templates/nginx.snippet.j2
new file mode 100644
index 00000000..f8f67c45
--- /dev/null
+++ b/roles/nginx/auth/whawty-sso/base/templates/nginx.snippet.j2
@@ -0,0 +1,19 @@
+auth_request /auth;
+error_page 401 = @error401;
+
+location /auth {
+    internal;
+
+    proxy_pass 127.0.0.1:{{ item.value.port }}/auth;
+    proxy_pass_request_body off;
+    proxy_set_header Content-Length "";
+    proxy_set_header X-Origin-URI $request_uri;
+    proxy_set_header X-Host $http_host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+}
+
+location @error401 {
+    return 302 {{ item.value.login_url }}?redir=$scheme://$http_host$request_uri;
+}
diff --git a/roles/nginx/auth/whawty-sso/base/templates/whawty-nginx-sso@.service.j2 b/roles/nginx/auth/whawty-sso/base/templates/whawty-nginx-sso@.service.j2
new file mode 100644
index 00000000..d4a787f3
--- /dev/null
+++ b/roles/nginx/auth/whawty-sso/base/templates/whawty-nginx-sso@.service.j2
@@ -0,0 +1,31 @@
+[Unit]
+Description=whawty nginx SSO authentication daemon (%i)
+
+[Service]
+Restart=on-failure
+#Environment="WHAWTY_NGINX_SSO_DEBUG=1"
+ExecStart=/usr/bin/whawty-nginx-sso --config /etc/nginx/auth/whawty-sso/%i.yml run
+
+# systemd hardening-options
+AmbientCapabilities=
+CapabilityBoundingSet=
+DeviceAllow=/dev/null rw
+DevicePolicy=strict
+LockPersonality=true
+MemoryDenyWriteExecute=true
+NoNewPrivileges=true
+PrivateDevices=true
+PrivateTmp=true
+PrivateUsers=true
+ProtectControlGroups=true
+ProtectHome=true
+ProtectKernelModules=true
+ProtectKernelTunables=true
+ProtectSystem=full
+RemoveIPC=true
+RestrictNamespaces=true
+RestrictRealtime=true
+SystemCallArchitectures=native
+
+[Install]
+WantedBy=multi-user.target
diff --git a/roles/nginx/auth/whawty-sso/login/defaults/main.yml b/roles/nginx/auth/whawty-sso/login/defaults/main.yml
new file mode 100644
index 00000000..c9261474
--- /dev/null
+++ b/roles/nginx/auth/whawty-sso/login/defaults/main.yml
@@ -0,0 +1,61 @@
+---
+# whawty_nginx_sso_logins:
+#   example:
+#     hostname: login.example.com
+#     tls:
+#       certificate_provider: ....
+#       ...
+#     config:
+#       cookie:
+#         domain: ".example.com"
+#         name: __Secure-example-sso
+#         secure: yes
+#         expire: 168h
+#         keys:
+#         - name: 2023-11
+#           ed25519:
+#             private-key: |-
+#               ....
+#       auth:
+#         ldap:
+#           servers:
+#           - ldaps://ldap1.example.com
+#           - ldaps://ldap2.example.com
+#           tls:
+#             start-tls: false
+#             insecure-skip-verify: false
+#             ca-certificates: |-
+#               -----BEGIN CERTIFICATE-----
+#               ...
+#               -----END CERTIFICATE-----
+#       web:
+#         listen: 127.0.0.1:1234
+#         login:
+#           title: "example.com - Login"
+#   foo:
+#     hostname: login.foo.bar
+#     tls:
+#       certificate_provider: ....
+#       ...
+#     config:
+#       cookie:
+#         domain: ".example.com"
+#         name: __Secure-foobar-sso
+#         secure: yes
+#         expire: 24h
+#         keys:
+#         - name: 2023-11
+#           ed25519:
+#             private-key: |-
+#               ....
+#       auth:
+#         static:
+#           autoreload: yes
+#       web:
+#         listen: 127.0.0.1:2345
+#         login:
+#           title: "foobar - Login"
+
+# whawty_nginx_sso_login_static_credentials__foo:
+#   admin: "very-secret"
+#   equinox: "secret"
diff --git a/roles/nginx/auth/whawty-sso/login/handlers/main.yml b/roles/nginx/auth/whawty-sso/login/handlers/main.yml
new file mode 100644
index 00000000..f4bbf308
--- /dev/null
+++ b/roles/nginx/auth/whawty-sso/login/handlers/main.yml
@@ -0,0 +1,6 @@
+---
+- name: restart whawty-nginx-sso
+  loop: "{{ whawty_nginx_sso_logins | list }}"
+  service:
+    name: "whawty-nginx-sso@{{ item }}.service"
+    state: restarted
diff --git a/roles/nginx/auth/whawty-sso/login/tasks/main.yml b/roles/nginx/auth/whawty-sso/login/tasks/main.yml
new file mode 100644
index 00000000..1ab43c8e
--- /dev/null
+++ b/roles/nginx/auth/whawty-sso/login/tasks/main.yml
@@ -0,0 +1,64 @@
+---
+- name: create configuration directory
+  file:
+    path: /etc/nginx/auth/whawty-sso
+    state: directory
+
+- name: generate htpasswd files for static backends
+  loop: "{{ whawty_nginx_sso_logins | dict2items | selectattr('value.config.auth.static', 'defined') | selectattr('value.config.auth.static.htpasswd', 'undefined') }}"
+  loop_control:
+    label: "{{ item.key }}"
+  copy:
+    content: |
+      {% for user,password in lookup('vars', 'whawty_nginx_sso_login_static_credentials__'~item.key).items() %}
+      {{ user }}:{{ password | password_hash('bcrypt', (user~'@whawty-nginx-sso_'~item.key) | bcrypt_salt) }}
+      {% endfor %}
+    dest: "/etc/nginx/auth/whawty-sso/{{ item.key }}.htpasswd"
+    mode: 0400
+
+
+- name: generate configuration file
+  loop: "{{ whawty_nginx_sso_logins | dict2items }}"
+  loop_control:
+    label: "{{ item.key }}"
+  copy:
+    content: |
+      # ansible generated
+      {% set ssoconf = item.value.config %}
+      {% if 'static' in ssoconf.auth and 'htpasswd' not in ssoconf.auth.static %}
+      {%   set _dummy = ssoconf.auth.static.update({'htpasswd': '/etc/nginx/auth/whawty-sso/'~item.key~'.htpasswd'}) %}
+      {% endif %}
+      {{ ssoconf | to_nice_yaml(indent=2) }}
+    dest: "/etc/nginx/auth/whawty-sso/{{ item.key }}.yml"
+    mode: 0400
+  notify: restart whawty-nginx-sso
+
+- name: make sure nginx-sso services are enabled and started
+  loop: "{{ whawty_nginx_sso_logins | list }}"
+  systemd:
+    name: "whawty-nginx-sso@{{ item }}.service"
+    daemon_reload: yes
+    state: started
+    enabled: yes
+
+- name: configure vhost for whawty nginx-sso login
+  loop: "{{ whawty_nginx_sso_logins | dict2items }}"
+  loop_control:
+    label: "{{ item.key }}"
+  vars:
+    nginx_vhost:
+      name: "whawty-nginx-sso-{{ item.key }}"
+      template: generic
+      tls:
+        certificate_provider: acmetool
+        certificate_config:
+          request:
+            challenge:
+              http-self-test: false
+      hostnames:
+      - "{{ item.value.hostname }}"
+      locations:
+        '/':
+          proxy_pass: "http://{{ item.value.config.web.listen }}/"
+  include_role:
+    name: nginx/vhost
-- 
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