lib/cose/algorithm/ecdsa.rb in cose-1.1.0 vs lib/cose/algorithm/ecdsa.rb in cose-1.2.0

@@ -1,22 +1,24 @@
 # frozen_string_literal: true
 
 require "cose/algorithm/signature_algorithm"
 require "cose/error"
+require "cose/key/curve"
 require "cose/key/ec2"
 require "openssl"
 require "openssl/signature_algorithm/ecdsa"
 
 module COSE
   module Algorithm
     class ECDSA < SignatureAlgorithm
-      attr_reader :hash_function
+      attr_reader :hash_function, :curve
 
-      def initialize(*args, hash_function:)
+      def initialize(*args, hash_function:, curve_name:)
         super(*args)
 
         @hash_function = hash_function
+        @curve = COSE::Key::Curve.by_name(curve_name) || raise("Couldn't find curve with name='#{curve_name}'")
       end
 
       private
 
       def valid_key?(key)
@@ -25,9 +27,17 @@
         cose_key.is_a?(COSE::Key::EC2) && (!cose_key.alg || cose_key.alg == id)
       end
 
       def signature_algorithm_class
         OpenSSL::SignatureAlgorithm::ECDSA
+      end
+
+      def signature_algorithm_parameters
+        if curve
+          super.merge(curve: curve.pkey_name)
+        else
+          super
+        end
       end
 
       def to_pkey(key)
         case key
         when COSE::Key::EC2