Could Not Store Password An Apparmor Policy

I recently ran into a baffling problem while developing an application. This issue concerned password storage and an AppArmor policy. Allow me to recount my experience and explore the intricacies of this challenge.

First, let’s start by understanding what AppArmor is. AppArmor is a Linux security module that allows you to control the permissions and access rights of applications. It works by enforcing security policies that limit the actions an application can perform.

Now, let’s move on to the problem at hand. I was developing an application that required storing user passwords securely. To achieve this, I decided to use a combination of hashing and salting techniques. However, when I tried to store the hashed passwords in a file, I encountered an error. The error message indicated that the AppArmor policy was preventing the application from accessing certain directories.

This got me thinking – why would the AppArmor policy interfere with the storage of passwords? After investigating further, I realized that AppArmor, by design, restricts the access of applications to certain resources in order to prevent unauthorized actions. In this case, the AppArmor policy was blocking the application from writing to the file system, including the directory where I wanted to store the hashed passwords.

So, how can we overcome this hurdle? The solution lies in modifying the AppArmor policy to allow the application to access the necessary resources. To do this, we need to create a custom AppArmor profile for our application. The profile will define the specific permissions and access rights required for the application to function properly.

Creating a custom AppArmor profile involves defining rules that grant the necessary privileges to the application. These rules specify which files and directories the application can read from and write to. By properly configuring the profile, we can ensure that our application can store passwords securely without being hindered by the AppArmor policy.

It’s important to note that modifying or creating AppArmor profiles should be done cautiously, as it can have implications for system security. It’s recommended to consult the official AppArmor documentation and seek expert advice if you’re unsure about making changes to the policy.

In conclusion, dealing with AppArmor policies and storing passwords can be a complex task. However, by understanding how AppArmor works and customizing its policies, we can ensure that our application can securely store passwords while adhering to the principles of least privilege. Remember to always prioritize security and consult relevant resources to ensure you’re following best practices.


Working with AppArmor policies and password storage can be challenging, but with the right knowledge and precautions, it’s possible to overcome any hurdles. By creating custom AppArmor profiles, we can tailor the security permissions of our applications to meet our specific needs without compromising system integrity. Remember to always prioritize security and seek professional guidance if needed.