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Forum Discussion

gpoverland's avatar
gpoverland
Icon for Nimbostratus rankNimbostratus
Feb 03, 2016

F5 iRule Example integrating HMAC

I currently utilize a static key value to create a custom encrypted cookie to validate user session authenticity via cookie values. I would like to move over to using an HMAC solution, but having iss...
iRules
LTM
security
gpoverland's avatar
gpoverland
Icon for Nimbostratus rankNimbostratus
Feb 03, 2016

Nothing yet.. The example didn't really define with comments what the values mean. For example, I believe the message variable is the data I want encrypted and that the token is the output. This could be just an issue of me reading up on HMAC, so just trying to see if someone has a full blown example of how they used it for say... user session authentication or validation.. Make sense? Thanks for replying so quickly

 

Kai_Wilke's avatar
Kai_Wilke
Icon for MVP rankMVP
Feb 03, 2016
On the first sight i would say that $message is the message to be authenticated and $input is your secret key. You may also take a look to the available Google-Authenticator iRule samples, to see some real world examples. GA tokens are using HMAC-SHA1 calculations. Cheers, Kai