move http authenticator to its own file

1 files changed, 85 insertions, 0 deletions

diff --git a/lib/chef/rest/authenticator.rb b/lib/chef/rest/authenticator.rb
new file mode 100644
index 0000000000..13f33cde25
--- /dev/null
+++ b/lib/chef/rest/authenticator.rb
@@ -0,0 +1,85 @@
+#--
+# Author:: Daniel DeLeo (<dan@opscode.com>)
+# Copyright:: Copyright (c) 2013 Opscode, Inc.
+# License:: Apache License, Version 2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+require 'chef/rest/auth_credentials'
+require 'chef/exceptions'
+require 'openssl'
+
+class Chef
+  class REST
+    class Authenticator
+
+      attr_reader :signing_key_filename
+      attr_reader :raw_key
+      attr_reader :attr_names
+      attr_reader :auth_credentials
+
+      attr_accessor :sign_request
+
+      def initialize(opts={})
+        @raw_key = nil
+        @sign_request = true
+        @signing_key_filename = opts[:signing_key_filename]
+        @key = load_signing_key(opts[:signing_key_filename], opts[:raw_key])
+        @auth_credentials = AuthCredentials.new(opts[:client_name], @key)
+      end
+
+      def handle_request(method, url, headers={}, data=false)
+        headers.merge!(authentication_headers(method, url, data)) if sign_requests?
+        [method, url, headers, data]
+      end
+
+      def handle_response(http_response, rest_request, return_value)
+        [http_response, rest_request, return_value]
+      end
+
+      def sign_requests?
+        auth_credentials.sign_requests? && @sign_request
+      end
+
+      def client_name
+        @auth_credentials.client_name
+      end
+
+      def load_signing_key(key_file, raw_key = nil)
+        if (!!key_file)
+          @raw_key = IO.read(key_file).strip
+        elsif (!!raw_key)
+          @raw_key = raw_key.strip
+        else
+          return nil
+        end
+        @key = OpenSSL::PKey::RSA.new(@raw_key)
+      rescue SystemCallError, IOError => e
+        Chef::Log.warn "Failed to read the private key #{key_file}: #{e.inspect}"
+        raise Chef::Exceptions::PrivateKeyMissing, "I cannot read #{key_file}, which you told me to use to sign requests!"
+      rescue OpenSSL::PKey::RSAError
+        msg = "The file #{key_file} or :raw_key option does not contain a correctly formatted private key.\n"
+        msg << "The key file should begin with '-----BEGIN RSA PRIVATE KEY-----' and end with '-----END RSA PRIVATE KEY-----'"
+        raise Chef::Exceptions::InvalidPrivateKey, msg
+      end
+
+      def authentication_headers(method, url, json_body=nil)
+        request_params = {:http_method => method, :path => url.path, :body => json_body, :host => "#{url.host}:#{url.port}"}
+        request_params[:body] ||= ""
+        auth_credentials.signature_headers(request_params)
+      end
+
+    end
+  end
+end