Crypto namespace contains the openssl modules. It has no integration
testing as of now.
This commits aims to add integration tests for the crypto namespace.
This will make it easier to spot breaking changes in the future.
This tests currently apply to:
* openssl_privatekey
* openssl_publickey
* openssl_csr
* openssl_publickey: Allow one to specify file permission
Allow a user to specify file permissions on the generated publickey via
the file module common arguments.
* openssl: Add documentation regarding file_common_args
Add documentation for those modules to let the user know that he can
rely on file_common_args to specify file permissions.
The commit was started before 2.3 was branched, but was only merged once
2.3 was actually branched. This leads to documentation stating this
module is new in 2.3 when it will be actually new in 2.4