Clarify Path to File

path to which file? Please clarify your question :)

You may use both relative and absolute path. To use absolute you need it to be enabled in PHP settings.

In Drupal 7 you may even use constructions like private://... or public://...

Module assumed moderate Drupal/OS admin skills so it is obvious for most users.

This is important to anyone using Pantheon or another cloud hosting solution. dpovshed, you should not assume the skill level of user installing this module as it is a recommended/required module for other modules such as Commerce UPS. Not criticizing, just FYI.

Thank you 2ndmile to pointing my attention to this, will keep this in mind!

To use private:// or public:// the following fixes are needed:

diff aes.admin.inc*
33c33
< if (file_exists(variable_get("aes_key_path", "")) && is_writable(drupal_realpath(variable_get("aes_key_path", ""))) == FALSE && variable_get("aes_key_storage_method", "Database") == "File") {
---
> if (file_exists(variable_get("aes_key_path", "")) && is_writable(variable_get("aes_key_path", "")) == FALSE && variable_get("aes_key_storage_method", "Database") == "File") {
182c182
< $fp = @fopen(drupal_realpath($form_state['values']['aes_key_path']), "a");
---
> $fp = @fopen($form_state['values']['aes_key_path'], "a");

and the .module:

diff aes.module*
344c344
< $key = file_get_contents(drupal_realpath(variable_get("aes_key_path", "")));
---
> $key = file_get_contents(variable_get("aes_key_path", ""));
376c376
< $fp = fopen(drupal_realpath(variable_get("aes_key_path", "")), "w");
---
> $fp = fopen(variable_get("aes_key_path", ""), "w");
378c378
< drupal_set_message(t("Couldn't write key to file '" . drupal_realpath(variable_get("aes_key_path", "")))."'", "error");
---
> drupal_set_message(t("Couldn't write key to file " . variable_get("aes_key_path", "")), "error");
397c397
< $result = unlink(drupal_realpath(variable_get("aes_key_path", "")));
---
> $result = unlink(variable_get("aes_key_path", ""));