openvpn roles - bas scaffolding and certs

10 files changed, 285 insertions, 0 deletions

diff --git a/roles/network/openvpn/base/tasks/main.yml b/roles/network/openvpn/base/tasks/main.yml
new file mode 100644
index 00000000..c5b43401
--- /dev/null
+++ b/roles/network/openvpn/base/tasks/main.yml
@@ -0,0 +1,5 @@
+---
+- name: install openvpn
+  apt:
+    name: openvpn
+    state: present
diff --git a/roles/network/openvpn/ca/tasks/main.yml b/roles/network/openvpn/ca/tasks/main.yml
new file mode 100644
index 00000000..90b021fc
--- /dev/null
+++ b/roles/network/openvpn/ca/tasks/main.yml
@@ -0,0 +1,52 @@
+---
+- name: install python-cryptoraphy
+  apt:
+    name: "{{ python_basename }}-cryptography"
+    state: present
+
+- name: create base directory
+  file:
+    path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}"
+    state: directory
+
+- name: create CA directory
+  file:
+    path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/ca"
+    state: directory
+    owner: root
+    group: root
+    mode: 0700
+
+- name: create CA private key
+  openssl_privatekey:
+    path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/ca/key.pem"
+    type: RSA
+    size: 4096
+    owner: root
+    group: root
+    mode: 0600
+
+- name: create signing request for CA certificate
+  openssl_csr:
+    path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/ca/csr.pem"
+    privatekey_path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/ca/key.pem"
+    CN: "CA for OpenVPN zone {{ openvpn_zone.name }}"
+    useCommonNameForSAN: no
+    key_usage:
+    - cRLSign
+    - keyCertSign
+    key_usage_critical: yes
+    basic_constraints:
+    - 'CA:TRUE'
+    - 'pathlen:0'
+    basic_constraints_critical: yes
+
+- name: create self-signed CA certificate
+  openssl_certificate:
+    path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/ca-crt.pem"
+    csr_path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/ca/csr.pem"
+    privatekey_path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/ca/key.pem"
+    provider: selfsigned
+    selfsigned_digest: sha256
+    selfsigned_not_after: "+18250d" ## 50 years
+    selfsigned_create_subject_key_identifier: always_create
diff --git a/roles/network/openvpn/client/defaults/main.yml b/roles/network/openvpn/client/defaults/main.yml
new file mode 100644
index 00000000..ed97d539
--- /dev/null
+++ b/roles/network/openvpn/client/defaults/main.yml
@@ -0,0 +1 @@
+---
diff --git a/roles/network/openvpn/client/handlers/main.yml b/roles/network/openvpn/client/handlers/main.yml
new file mode 100644
index 00000000..dc05dd89
--- /dev/null
+++ b/roles/network/openvpn/client/handlers/main.yml
@@ -0,0 +1,5 @@
+---
+- name: restart openvpn-client
+  service:
+    name: "openvpn-client@{{ openvpn_zone.name }}"
+    state: restarted
diff --git a/roles/network/openvpn/client/tasks/main.yml b/roles/network/openvpn/client/tasks/main.yml
new file mode 100644
index 00000000..49f6443f
--- /dev/null
+++ b/roles/network/openvpn/client/tasks/main.yml
@@ -0,0 +1,7 @@
+---
+- name: create TLS certificate and key
+  import_tasks: tls.yml
+
+## TODO:
+## - generate/install openvpn configuration
+## - enable/start "openvpn-server@{{ openvpn_zone.name }}"
diff --git a/roles/network/openvpn/client/tasks/tls.yml b/roles/network/openvpn/client/tasks/tls.yml
new file mode 100644
index 00000000..3c0d9b3f
--- /dev/null
+++ b/roles/network/openvpn/client/tasks/tls.yml
@@ -0,0 +1,97 @@
+---
+- name: install python-cryptography
+  apt:
+    name: "{{ python_basename }}-cryptography"
+    state: present
+
+- name: create base directory
+  file:
+    path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}"
+    state: directory
+
+- name: create client cert/key directory
+  file:
+    path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/client"
+    state: directory
+    owner: root
+    group: root
+    mode: 0750
+
+- name: create private key for client certificate
+  openssl_privatekey:
+    path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/client/key.pem"
+    type: RSA
+    size: 4096
+    owner: root
+    group: root
+    mode: 0400
+  notify: restart openvpn-client
+
+- name: create signing request for client certificate
+  openssl_csr:
+    path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/client/csr.pem"
+    privatekey_path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/client/key.pem"
+    CN: "{{ inventory_hostname }}"
+    key_usage:
+    - digitalSignature
+    key_usage_critical: yes
+    extended_key_usage:
+    - clientAuth
+    extended_key_usage_critical: yes
+    basic_constraints:
+    - 'CA:FALSE'
+    basic_constraints_critical: yes
+
+- name: slurp CSR
+  slurp:
+    src: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/client/csr.pem"
+  register: openvpn_client_csr
+
+- name: check if client certificate exists
+  stat:
+    path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/client/crt.pem"
+  register: openvpn_client_cert
+
+- name: read client certificate validity
+  when: openvpn_client_cert.stat.exists
+  openssl_certificate_info:
+    path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/client/crt.pem"
+    valid_at:
+      ten_years: '+3650d' ## 10 years
+  register: openvpn_client_cert_info
+
+- name: slurp existing client certificate
+  when: openvpn_client_cert.stat.exists
+  slurp:
+    src: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/client/crt.pem"
+  register: openvpn_client_cert_current
+
+- name: generate client certificate
+  delegate_to: "{{ openvpn_zone.ca_host }}"
+  community.crypto.x509_certificate_pipe:
+    content: "{{ openvpn_client_cert_current.content | default('') | b64decode }}"
+    csr_content: "{{ openvpn_client_csr.content | b64decode }}"
+    provider: ownca
+    ownca_path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/ca-crt.pem"
+    ownca_privatekey_path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/ca/key.pem"
+    ownca_digest: sha256
+    ownca_not_after: "+18250d" ## 50 years
+    force: "{{ openvpn_client_cert.stat.exists and (not openvpn_client_cert_info.valid_at.ten_years) }}"
+  register: openvpn_client_cert
+
+- name: store client certificate
+  copy:
+    content: "{{ openvpn_client_cert.certificate }}"
+    dest: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/client/crt.pem"
+  notify: restart openvpn-client
+
+- name: slurp CA certificate
+  delegate_to: "{{ openvpn_zone.ca_host }}"
+  slurp:
+    src: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/ca-crt.pem"
+  register: openvpn_client_ca_certificate
+
+- name: install CA certificate
+  copy:
+    content: "{{ openvpn_client_ca_certificate.content | b64decode }}"
+    dest: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/ca-crt.pem"
diff --git a/roles/network/openvpn/server/defaults/main.yml b/roles/network/openvpn/server/defaults/main.yml
new file mode 100644
index 00000000..ed97d539
--- /dev/null
+++ b/roles/network/openvpn/server/defaults/main.yml
@@ -0,0 +1 @@
+---
diff --git a/roles/network/openvpn/server/handlers/main.yml b/roles/network/openvpn/server/handlers/main.yml
new file mode 100644
index 00000000..0d29e194
--- /dev/null
+++ b/roles/network/openvpn/server/handlers/main.yml
@@ -0,0 +1,5 @@
+---
+- name: restart openvpn-server
+  service:
+    name: "openvpn-server@{{ openvpn_zone.name }}"
+    state: restarted
diff --git a/roles/network/openvpn/server/tasks/main.yml b/roles/network/openvpn/server/tasks/main.yml
new file mode 100644
index 00000000..98bb220b
--- /dev/null
+++ b/roles/network/openvpn/server/tasks/main.yml
@@ -0,0 +1,8 @@
+---
+- name: create TLS certificate and key
+  import_tasks: tls.yml
+
+## TODO:
+## - generate/install openvpn configuration
+## - generate/install client config directory
+## - enable/start "openvpn-server@{{ openvpn_zone.name }}"
diff --git a/roles/network/openvpn/server/tasks/tls.yml b/roles/network/openvpn/server/tasks/tls.yml
new file mode 100644
index 00000000..6508676d
--- /dev/null
+++ b/roles/network/openvpn/server/tasks/tls.yml
@@ -0,0 +1,104 @@
+---
+- name: install python-cryptography
+  apt:
+    name: "{{ python_basename }}-cryptography"
+    state: present
+
+- name: create base directory
+  file:
+    path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}"
+    state: directory
+
+- name: create server cert/key directory
+  file:
+    path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/server"
+    state: directory
+    owner: root
+    group: root
+    mode: 0750
+
+- name: create private key for server certificate
+  openssl_privatekey:
+    path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/server/key.pem"
+    type: RSA
+    size: 4096
+    owner: root
+    group: root
+    mode: 0400
+  notify: restart openvpn-server
+
+- name: create signing request for server certificate
+  openssl_csr:
+    path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/server/csr.pem"
+    privatekey_path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/server/key.pem"
+    CN: "{{ inventory_hostname }}"
+    key_usage:
+    - digitalSignature
+    - keyEncipherment
+    key_usage_critical: yes
+    extended_key_usage:
+    - serverAuth
+    extended_key_usage_critical: yes
+    basic_constraints:
+    - 'CA:FALSE'
+    basic_constraints_critical: yes
+
+- name: slurp CSR
+  slurp:
+    src: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/server/csr.pem"
+  register: openvpn_server_csr
+
+- name: check if server certificate exists
+  stat:
+    path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/server/crt.pem"
+  register: openvpn_server_cert
+
+- name: read server certificate validity
+  when: openvpn_server_cert.stat.exists
+  openssl_certificate_info:
+    path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/server/crt.pem"
+    valid_at:
+      ten_years: '+3650d' ## 10 years
+  register: openvpn_server_cert_info
+
+- name: slurp existing server certificate
+  when: openvpn_server_cert.stat.exists
+  slurp:
+    src: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/server/crt.pem"
+  register: openvpn_server_cert_current
+
+- name: generate server certificate
+  delegate_to: "{{ openvpn_zone.ca_host }}"
+  community.crypto.x509_certificate_pipe:
+    content: "{{ openvpn_server_cert_current.content | default('') | b64decode }}"
+    csr_content: "{{ openvpn_server_csr.content | b64decode }}"
+    provider: ownca
+    ownca_path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/ca-crt.pem"
+    ownca_privatekey_path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/ca/key.pem"
+    ownca_digest: sha256
+    ownca_not_after: "+18250d" ## 50 years
+    force: "{{ openvpn_server_cert.stat.exists and (not openvpn_server_cert_info.valid_at.ten_years) }}"
+  register: openvpn_server_cert
+
+- name: store server certificate
+  copy:
+    content: "{{ openvpn_server_cert.certificate }}"
+    dest: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/server/crt.pem"
+  notify: restart openvpn-server
+
+- name: slurp CA certificate
+  delegate_to: "{{ openvpn_zone.ca_host }}"
+  slurp:
+    src: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/ca-crt.pem"
+  register: openvpn_server_ca_certificate
+
+- name: install CA certificate
+  copy:
+    content: "{{ openvpn_server_ca_certificate.content | b64decode }}"
+    dest: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/ca-crt.pem"
+
+- name: generate Diffie-Hellman parameters
+  openssl_dhparam:
+    path: "/etc/ssl/openvpn/{{ openvpn_zone.name }}/dhparams.pem"
+    size: 2048
+  notify: restart openvpn-server