Comment by madeofpalk
2 months ago
My main takeaway from all of these is to stop using tokens, and rely on mechanisms like OIDC to reduce the blast radius of a compromise.
How many tokens do you have lying around in your home directory in plain text, able to be read by anything on your computer running as your user?
> How many tokens do you have lying around in your home directory in plain text, able to be read by anything on your computer running as your user?
Zero? How many developers have plain-text tokens lying around on disk? Avoiding that been hammered into me from every developer more senior than me since I got involved with professional software development.
You're sure you don't have something lying around in ~/.config ? Until recently the github cli would just save its refresh token as a plain text file. AWS CLI loves to have secrets sitting around in a file https://docs.aws.amazon.com/cli/latest/userguide/cli-configu...
I don't use AWS and looking in ~/.config/gh I see two config files, no plain-text secrets.
With that said, it's not impossible some tool leaks their secrets into ~/.local, ~/.cache or ~/.config I suppose.
I thought they were referencing the common approach of adding environment variables with plaintext secrets to your shell config or as an individual file in $HOME, which been a big no-no for as long as I can remember.
I guess I'd reword it to "I'm not manually putting any cleartext secrets on disk" or something instead, if we wanted it to be 100% accurate.
> How many developers have plain-text tokens lying around on disk?
Most of them. Mainly on purpose, (.env files) but many also accidentally. (shell history with tokens in the commands)
Exactly. There are tools that allow debugging production environments without having to have the credentials on your disk.
I recommend Envie: https://github.com/ilmari-h/envie
It's more convenient than having a bunch of .env.prod, .env.staging files laying around, not to mention more secure.
Isn't this quite hard to achieve on local systems, where you don't have a CI vault automation to help?
Most popular apps today have integrations to allow reading secrets from external programs. If not, they can take them from environment variables. Both those can then be loaded from a password manager, so the secret never lands on disk in plaintext.
Your program (or your shell) opens. It runs a program to ask the password manager for a secret. Your password manager prompts you to authorize unsealing the secret. You accept or deny. The secret is passed to the program that asked for it. Works very well with 1Password and tools like git, ssh, etc, or simply exporting the secret to an environment variable, either in a script or bashrc file.
Other programs also support OIDC, such as with git credential helper plugins, or aws sso auth.
I'd argue the reverse is true. On your local system, which only need to operate when a named user with a (hopefully) strong password is present, you can encrypt the secrets with the user's login password and the OS can verify that it's handing the secret out to the correct binary before doing so. The binary can also take steps to verify that it is being called directly from a user interaction and not from a build script of some random package.
The extent to which any of this is actually implemented varies wildly between different OSes, ecosystems and tools. On macOS, docker desktop does quite well here. There's also an app called Secretive which does even better for SSH keys - generating a non-exportable key in the CPU's secure enclave. It can even optionally prompt for login password or fingerprint before allowing the key to be used. It's practically almost as secure as using a separate hardware token for SSH but significantly more convenient.
In contrast, most of the time the only thing protecting the keys in your CI vault from being exfiltrated is that the malware needs to know the specific name / API call / whatever to read them. Plenty of CI systems you don't even need that, because the build script that uses the secrets will read them into environment variables before starting the build proper.
It's not that hard if it's something you decide you care about and want to solve. Like diggan mentions, there's many tools, some you already might use, that can be used to inject secrets into applications that's not too onerous to use in your development workflow.
I don't think so? I don't even know what a "CI vault automation" is, I store my credentials and secrets in 1Password, and use the CLI to get the secrets for the moments they're needed, I do all my development locally and things seem fine.
How do you manage secrets for your projects?
One option is pass, which is a shell script that uses GPG to manage passwords for command line tools. You can put the password store into a git repository if you need to sync it across machines.
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Using a password manager for fetching them when needed. 1Password in my case, but I'm sure any password manager can be used for storing secrets for most programming projects.
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A good habit, but encryption won't save you in all cases because anything you run has write access to .bashrc.
Frankly, our desktop OSes are not fit for purpose anymore. It's nuts that everything I run can instantly own my entire user account.
It's the old https://xkcd.com/1200/ . That's from 2013 and what little (Flatpak, etc.) has changed has only changed for end users - not developers.