ssh-keygen accepting stdin

Posted by Ryan on Stack Overflow See other posts from Stack Overflow or by Ryan
Published on 2010-04-14T06:42:43Z Indexed on 2010/04/14 6:43 UTC
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Filed under:

ssh-keys

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bash

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linux

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variables

I am trying to call ssh-keygen using a variable through bash as an input instead of a file to get a fingerprint of a public key.

This method does not work as it says the key file is invalid (it's correct for sure)

echo $pubkey | ssh-keygen -lf /dev/stdin

This does work

ssh-keygen -lf /dev/stdin < alpha.pub

This does not work because I get an ambiguous redirect

ssh-keygen -lf /dev/stdin < $(echo $pubkey)

I would appreciate some insight as to how to get ssh-keygen to read from a variable with a public key and if possible, an explanation as to why the redirects aren't doing what I think they should be doing. I searched online but many of the redirect tutorials didn't seem to answer my questions.

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