diff options
Diffstat (limited to 'lib/puppet/parser/functions/onion_address.rb')
| -rw-r--r-- | lib/puppet/parser/functions/onion_address.rb | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/onion_address.rb b/lib/puppet/parser/functions/onion_address.rb new file mode 100644 index 0000000..a6f9755 --- /dev/null +++ b/lib/puppet/parser/functions/onion_address.rb @@ -0,0 +1,30 @@ +require 'base32' +module Puppet::Parser::Functions + newfunction(:onion_address, :type => :rvalue, :doc => <<-EOS +Generates an onion address from a 1024-bit RSA private key. + +Example: + + onion_address("-----BEGIN RSA PRIVATE KEY----- +MII.... +-----END RSA PRIVATE KEY-----") + +Returns the onionadress for that key, *without* the .onion suffix. + EOS + ) do |args| + key = args.shift + raise(Puppet::ParseError, "onion_address(): requires 1 argument") unless key && args.empty? + private_key = key.is_a?(OpenSSL::PKey::RSA) ? key : OpenSSL::PKey::RSA.new(key) + + # the onion address are a base32 encoded string of the first half of the sha1 over the + # der format of the public key + # https://trac.torproject.org/projects/tor/wiki/doc/HiddenServiceNames#Howare.onionnamescreated + # We can skip the first 22 bits of the der format as they are ignored by tor + # https://timtaubert.de/blog/2014/11/using-the-webcrypto-api-to-generate-onion-names-for-tor-hidden-services/ + # https://gitweb.torproject.org/torspec.git/tree/rend-spec.txt#n525 + # Except for Ruby 1.8.7 where the first 22 are not present at all + start = RUBY_VERSION.to_f < 1.9 ? 0 : 22 + public_key_der = private_key.public_key.to_der + Base32.encode(Digest::SHA1.digest(public_key_der[start..-1]))[0..15].downcase + end +end |