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#!/usr/bin/env ruby
#
# GitLab shell authorized_keys helper. Query GitLab API to get the authorized
# command for a given ssh key fingerprint
#
# Ex.
# bin/gitlab-shell-authorized-keys-check <username> <public-key>
#
# Returns
# command="/bin/gitlab-shell key-#",no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty ssh-rsa AAAA...
#
# Expects to be called by the SSH daemon, via configuration like:
# AuthorizedKeysCommandUser git
# AuthorizedKeysCommand /bin/gitlab-shell-authorized-keys-check git %u %k
abort "# Wrong number of arguments. #{ARGV.size}. Usage:
# gitlab-shell-authorized-keys-check <expected-username> <actual-username> <key>" unless ARGV.size == 3
expected_username = ARGV[0]
abort '# No username provided' if expected_username.nil? || expected_username == ''
actual_username = ARGV[1]
abort '# No username provided' if actual_username.nil? || actual_username == ''
# Only check access if the requested username matches the configured username.
# Normally, these would both be 'git', but it can be configured by the user
exit 0 unless expected_username == actual_username
key = ARGV[2]
abort "# No key provided" if key.nil? || key == ''
require 'gitlab_init'
require 'gitlab_net'
require 'gitlab_keys'
authorized_key = GitlabNet.new.authorized_key(key)
if authorized_key.nil?
puts "# No key was found for #{key}"
else
puts GitlabKeys.key_line("key-#{authorized_key['id']}", authorized_key['key'])
end
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