this post was submitted on 25 Sep 2023
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Programming

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How to store user's access tokens/API keys without hashing them? (lemmy.pe1uca.dev)
submitted 1 year ago by [email protected] to c/programming
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In an API I have there's a requirement to use an authentication method other than OAuth2 or any kind of token generation which requires making an extra HTTP call.

With this in mind there's this https://www.xml.com/pub/a/2003/12/17/dive.html
I've only stored passwords as hashes and used functions like password_verify to know the user sent the proper credentials without actually knowing the password stored in DB.
WSSE requires to encrypt with SHA1 the credentials being sent, which means the API needs to retrieve the password in plain text to recreate the digest and compare it to the one sent by the user.
So, how should I be storing this password if the code needs it to recreate the hash?
Should I have something like a master password and store them encrypted instead of hashed?

Most of the information I've found about WSSE is very very old, and some implementations have it marked as deprecated, do you know any other type of standard authentication where the user can generate the token instead of having to make an extra HTTP call?

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[–] [email protected] 6 points 1 year ago* (last edited 1 year ago) (1 children)

making a call to generate a token is slow

If it was happening every page load or every API call, you might have a weak argument.

Regardless, what's the general architecture of this app? You've got an HTTP API, what else? How much is under your control, versus third parties?

[–] [email protected] 1 points 1 year ago (1 children)

I agree, the token has a lifespan of some hours so it could be generated after that amount of time, which for a ~400ms call is not that much, but I was overruled .-.

The only thing I control is the API, the client's implementation is outside of my control (although I know is a backend service).

[–] [email protected] 4 points 1 year ago

Okay, so you're building an API that another server needs to auth with? If the opposing side is a server, a pre-shared PKI cert ought to work. If the opposing side is a potentially-untrustworth client application, the truth is there's nothing that's going to fit such a simple definition of "extra". The back and forth it takes to establish token exchange is not "extra" is the cost you have to pay to get security.