1 files changed, 83 insertions, 0 deletions
diff --git a/provider_base/lib/macros/keys.rb b/provider_base/lib/macros/keys.rb
new file mode 100644
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+++ b/provider_base/lib/macros/keys.rb
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+# encoding: utf-8
+
+#
+# Macro for dealing with cryptographic keys
+#
+
+module LeapCli
+  module Macro
+
+    #
+    # return the path to the tor public key
+    # generating key if it is missing
+    #
+    def tor_public_key_path(path_name, key_type)
+      path = file_path(path_name)
+      if path.nil?
+        generate_tor_key(key_type)
+        file_path(path_name)
+      else
+        path
+      end
+    end
+
+    #
+    # return the path to the tor private key
+    # generating key if it is missing
+    #
+    def tor_private_key_path(path_name, key_type)
+      path = file_path(path_name)
+      if path.nil?
+        generate_tor_key(key_type)
+        file_path(path_name)
+      else
+        path
+      end
+    end
+
+    #
+    # Generates a onion_address from a public RSA key file.
+    #
+    # path_name is the named path of the Tor public key.
+    #
+    # Basically, an onion address is nothing more than a base32 encoding
+    # of the first 10 bytes of a sha1 digest of the public key.
+    #
+    # Additionally, Tor ignores the 22 byte header of the public key
+    # before taking the sha1 digest.
+    #
+    def onion_address(path_name)
+      require 'base32'
+      require 'base64'
+      require 'openssl'
+      path = Path.find_file([path_name, self.name])
+      if path && File.exists?(path)
+        public_key_str = File.readlines(path).grep(/^[^-]/).join
+        public_key     = Base64.decode64(public_key_str)
+        public_key     = public_key.slice(22..-1) # Tor ignores the 22 byte SPKI header
+        sha1sum        = Digest::SHA1.new.digest(public_key)
+        Base32.encode(sha1sum.slice(0,10)).downcase
+      else
+        LeapCli.log :warning, 'Tor public key file "%s" does not exist' % tor_public_key_path
+      end
+    end
+
+    private
+
+    def generate_tor_key(key_type)
+      if key_type == 'RSA'
+        require 'certificate_authority'
+        keypair = CertificateAuthority::MemoryKeyMaterial.new
+        bit_size = 1024
+        LeapCli.log :generating, "%s bit RSA Tor key" % bit_size do
+          keypair.generate_key(bit_size)
+          LeapCli::Util.write_file! [:node_tor_priv_key, self.name], keypair.private_key.to_pem
+          LeapCli::Util.write_file! [:node_tor_pub_key, self.name], keypair.public_key.to_pem
+        end
+      else
+        LeapCli.bail! 'tor.key.type of %s is not yet supported' % key_type
+      end
+    end
+
+  end
+end