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paranoiq/key.regexp.txt

Last active March 14, 2025 17:56
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public RSA key validation regexp
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key.regexp.txt
#ssh-rsa AAAA[0-9A-Za-z+/]+[=]{0,3} ([^@]+@[^@]+)#
// this is the most simple case. see more complete regexps in coments below
// http://generator.my-addr.com/generate_ssh_public_rsa_key-private_rsa_key-ssh_pair_online_tool.php
// https://help.ubuntu.com/community/SSH/OpenSSH/Keys
// http://www.ietf.org/rfc/rfc4716.txt
@nemchik
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nemchik commented Jun 19, 2022

@MaPePeR thanks for the follow up! That's super helpful! This comment thread is getting a bit large, so I'm considering making a repository where this could be kept up with and issues and pull requests could be opened to improve the information.

I'd want to include information such as removing characters from the end for the reasons you mentioned.

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nemchik commented Jun 20, 2022

I've put together a repository here https://github.com/nemchik/ssh-key-regex
I've cited credit to @paranoiq for this gist and @MaPePeR for all of the amazing information provided here in the comments.

If I am made aware of new supported key types I will be happy to update the information or accept pull requests to improve.

A potential future goal will be to use GitHub pages to present the information as a webpage with nicer formatting.

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