ssh_keys_users.rb
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ssh_keys_users.rb
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	# SPDX-License-Identifier: GPL-3
	# From https://gitlab.com/shared-puppet-modules-group/sshd/ @ c887bf09

	require 'etc'

	# this fact will iterate over all the known users (as defined by the
	# Etc module) and look in their .ssh directory for public keys. the
	# public keys are exported in a user => [keys] hash, where keys are
	# stored in the array without distinction of type
	Facter.add(:ssh_keys_users) do
	setcode do
	keys_hash = {}
	Etc.passwd { \|user\|
	keys = {}
	Dir.glob(File.join(user.dir, '.ssh', '*.pub')).each { \|filepath\|
	if FileTest.file?(filepath)
	regex = %r{^ssh-(\S+) (\S+)\s?(.+)?$}
	begin
	line = File.open(filepath).read.chomp
	if (match = regex.match(line))
	keys[File.basename(filepath)] = {
	'type' => match[1],
	'key' => match[2],
	'comment' => match[3]
	}
	end
	rescue
	puts "cannot read user SSH key: " + user.name
	end
	end
	}
	keys_hash[user.name] = keys if not keys.empty?
	}
	keys_hash
	end
	end