lib/rbnacl/hmac/sha256.rb in rbnacl-1.1.0 vs lib/rbnacl/hmac/sha256.rb in rbnacl-2.0.0.pre

@@ -1,39 +1,41 @@
 # encoding: binary
-module Crypto
+module RbNaCl
   module HMAC
     # Computes an authenticator as HMAC-SHA-256
     #
-    # The authenticator can be used at a later time to verify the provenence of
+    # The authenticator can be used at a later time to verify the provenance of
     # the message by recomputing the HMAC over the message and then comparing it to
     # the provided authenticator.  The class provides methods for generating
     # signatures and also has a constant-time implementation for checking them.
     #
     # This is a secret key authenticator, i.e. anyone who can verify signatures
     # can also create them.
     #
     # @see http://nacl.cr.yp.to/auth.html
     class SHA256 < Auth
-      # Number of bytes in a valid key
-      KEYBYTES = NaCl::HMACSHA256_KEYBYTES
+      extend Sodium
 
-      # Number of bytes in a valid authenticator
-      BYTES = NaCl::HMACSHA256_BYTES
+      sodium_type      :auth
+      sodium_primitive :hmacsha256
+      sodium_constant  :BYTES
+      sodium_constant  :KEYBYTES
 
-      # The crypto primitive for the HMAC::SHA256 class
-      #
-      # @return [Symbol] The primitive used
-      def self.primitive
-        :hmac_sha256
-      end
-
+      sodium_function  :auth_hmacsha256,
+                       :crypto_auth_hmacsha256,
+                       [:pointer, :pointer, :ulong_long, :pointer]
+      
+      sodium_function  :auth_hmacsha256_verify,
+                       :crypto_auth_hmacsha256_verify,
+                       [:pointer, :pointer, :ulong_long, :pointer]
+      
       private
-      def compute_authenticator(message, authenticator)
-        NaCl.crypto_auth_hmacsha256(authenticator, message, message.bytesize, key)
+      def compute_authenticator(authenticator, message)
+        self.class.auth_hmacsha256(authenticator, message, message.bytesize, key)
       end
 
-      def verify_message(message, authenticator)
-        NaCl.crypto_auth_hmacsha256_verify(authenticator, message, message.bytesize, key)
+      def verify_message(authenticator, message)
+        self.class.auth_hmacsha256_verify(authenticator, message, message.bytesize, key)
       end
     end
   end
 end