Add ansible certificates role

This role is used to generate and install certificates on instances,
incl. root ca.
Those certificates are used mainly to allow secure access to
internal docker registry with proper certificate verification.

Issue-ID: OOM-1551
Change-Id: I74782dd2938cb51da293f88483d5362981269196
Signed-off-by: Michal Zegan <m.zegan@samsung.com>

3 files changed, 119 insertions, 0 deletions

diff --git a/ansible/roles/certificates/tasks/main.yml b/ansible/roles/certificates/tasks/main.yml
new file mode 100644
index 00000000..2e7dd88a
--- /dev/null
+++ b/ansible/roles/certificates/tasks/main.yml
@@ -0,0 +1,100 @@
+---
+# Some of task are delegated to Ansible container because unavailable
+# version of python-pyOpenSSL
+- name: Generate root CA private key
+  openssl_privatekey:
+    path: /certs/rootCA.key
+    size: 4096
+  delegate_to: localhost
+
+- name: Generate an OpenSSL CSR.
+  openssl_csr:
+    path: /certs/rootCA.csr
+    privatekey_path: /certs/rootCA.key
+    organization_name: "{{ certificates.organization_name }}"
+    state_or_province_name: "{{ certificates.state_or_province_name }}"
+    country_name: "{{ certificates.country_name }}"
+    locality_name: "{{ certificates.locality_name }}"
+    basic_constraints:
+      - CA:true
+    basic_constraints_critical: yes
+    key_usage:
+      - critical
+      - digitalSignature
+      - cRLSign
+      - keyCertSign
+  delegate_to: localhost
+
+- name: Generate root CA certificate
+  openssl_certificate:
+    provider: selfsigned
+    path: /certs/rootCA.crt
+    csr_path: /certs/rootCA.csr
+    privatekey_path: /certs/rootCA.key
+    key_usage:
+      - critical
+      - digitalSignature
+      - cRLSign
+      - keyCertSign
+    force: yes
+  delegate_to: localhost
+  notify: Restart Docker
+
+- name: Generate private Nexus key
+  openssl_privatekey:
+    path: /certs/nexus_server.key
+    size: 4096
+    force: False
+  delegate_to: localhost
+
+- name: Generate Nexus CSR (certificate signing request)
+  openssl_csr:
+    path: /certs/nexus_server.csr
+    privatekey_path: /certs/nexus_server.key
+    organization_name: "{{ certificates.organization_name }}"
+    state_or_province_name: "{{ certificates.state_or_province_name }}"
+    country_name: "{{ certificates.country_name }}"
+    locality_name: "{{ certificates.locality_name }}"
+    common_name: registry-1.docker.io
+    key_usage:
+      - keyAgreement
+      - nonRepudiation
+      - digitalSignature
+      - keyEncipherment
+      - dataEncipherment
+    extended_key_usage:
+      - serverAuth
+    subject_alt_name:
+      "{{ simulated_hosts | map('regex_replace', '(.*)', 'DNS:\\1') | list }}"
+  delegate_to: localhost
+
+- name: Generate v3 extension config file
+  template:
+    src: v3.ext.j2
+    dest: /certs/v3.ext
+  delegate_to: localhost
+
+# Signing certificate is added to Ansible in version 2.7 (release date 04.10.2018)
+# Currently using 2.6.3
+- name: Sign Nexus certificate
+  command: >
+    openssl
+    x509
+    -req
+    -in /certs/nexus_server.csr
+    -extfile /certs/v3.ext
+    -CA /certs/rootCA.crt
+    -CAkey /certs/rootCA.key
+    -CAcreateserial
+    -out /certs/nexus_server.crt
+    -days 3650
+    -sha256
+  delegate_to: localhost
+
+- name: Upload certificates to infrastructure server
+  copy:
+    src: /certs
+    directory_mode: yes
+    dest: "{{ app_data_path }}/"
+
+- import_tasks: upload_root_ca.yml
diff --git a/ansible/roles/certificates/tasks/upload_root_ca.yml b/ansible/roles/certificates/tasks/upload_root_ca.yml
new file mode 100644
index 00000000..5a59d27b
--- /dev/null
+++ b/ansible/roles/certificates/tasks/upload_root_ca.yml
@@ -0,0 +1,10 @@
+---
+- name: Copy root certificate
+  copy:
+    src: "/certs/rootCA.crt"
+    dest: /etc/pki/ca-trust/source/anchors/
+  notify: Restart Docker
+
+- name: Extract root certificate
+  command: /usr/bin/update-ca-trust extract
+  notify: Restart Docker
diff --git a/ansible/roles/certificates/templates/v3.ext.j2 b/ansible/roles/certificates/templates/v3.ext.j2
new file mode 100644
index 00000000..7be946fd
--- /dev/null
+++ b/ansible/roles/certificates/templates/v3.ext.j2
@@ -0,0 +1,9 @@
+authorityKeyIdentifier=keyid,issuer
+basicConstraints=CA:FALSE
+keyUsage = digitalSignature, nonRepudiation, keyEncipherment, dataEncipherment
+subjectAltName = @alt_names
+
+[alt_names]
+{% for name in all_simulated_hosts -%}
+    DNS.{{ loop.index }} = {{ name }}
+{% endfor %}