Extend test coverage for openssl modules (#27548)

* openssl_privatekey: Extend test coverage

Extend the coverage of the integration test for the module
openssl_privatekey.

New tests have been added:

  * passphrase
  * idempotence
  * removal

Co-Authored-By: Pierre-Louis Bonicoli <pierre-louis.bonicoli@gmx.fr>

* openssl_publickey: Extend test coverage

Extend the coverage on the integration test for the module
openssl_publickey.

New tests have been added:

  * OpenSSH format
  * passphrase
  * idempotence
  * removal

test/integration/targets/openssl_publickey/tasks/main.yml

@@ -3,11 +3,51 @@
       openssl_privatekey:
         path: '{{ output_dir }}/privatekey.pem'
 
-    - name: Generate publickey
+    - name: Generate publickey - PEM format
       openssl_publickey:
         path: '{{ output_dir }}/publickey.pub'
         privatekey_path: '{{ output_dir }}/privatekey.pem'
 
+    - name: Generate publickey - OpenSSH format
+      openssl_publickey:
+        path: '{{ output_dir }}/publickey-ssh.pub'
+        privatekey_path: '{{ output_dir }}/privatekey.pem'
+        format: OpenSSH
+      # cryptography.hazmat.primitives import serialization.Encoding.OpenSSH and
+      # cryptography.hazmat.primitives import serialization.PublicFormat.OpenSSH constants
+      # appeared in version 1.4 of cryptography
+      when: cryptography_version.stdout|version_compare('1.4.0', '>=')
+
+    - name: Generate publickey2 - standard
+      openssl_publickey:
+        path: '{{ output_dir }}/publickey2.pub'
+        privatekey_path: '{{ output_dir }}/privatekey.pem'
+
+    - name: Delete publickey2 - standard
+      openssl_publickey:
+        state: absent
+        path: '{{ output_dir }}/publickey2.pub'
+        privatekey_path: '{{ output_dir }}/privatekey.pem'
+
+    - name: Generate privatekey3 - with passphrase
+      openssl_privatekey:
+        path: '{{ output_dir }}/privatekey3.pem'
+        passphrase: ansible
+        cipher: aes256
+
+    - name: Generate publickey3 - with passphrase protected privatekey
+      openssl_publickey:
+        path: '{{ output_dir }}/publickey3.pub'
+        privatekey_path: '{{ output_dir }}/privatekey3.pem'
+        privatekey_passphrase: ansible
+
+    - name: Generate publickey3 - with passphrase protected privatekey - idempotence
+      openssl_publickey:
+        path: '{{ output_dir }}/publickey3.pub'
+        privatekey_path: '{{ output_dir }}/privatekey3.pem'
+        privatekey_passphrase: ansible
+      register: publickey3_idempotence
+
     - import_tasks: ../tests/validate.yml
 
   when: pyopenssl_version.stdout|version_compare('16.0.0', '>=')