lib/braintree/digest.rb in braintree-1.0.1 vs lib/braintree/digest.rb in braintree-1.1.0

@@ -4,17 +4,11 @@
       _hmac_sha1(Configuration.private_key, string)
     end
 
     def self._hmac_sha1(key, message)
       key_digest = ::Digest::SHA1.digest(key)
-      inner_padding = "\x36" * 64
-      outer_padding = "\x5c" * 64
-      0.upto(19) do |i|
-        inner_padding[i] ^= key_digest[i]
-        outer_padding[i] ^= key_digest[i]
-      end
-      inner_hash = ::Digest::SHA1.digest(inner_padding + message.to_s)
-      ::Digest::SHA1.hexdigest(outer_padding + inner_hash)
+      sha1 = OpenSSL::Digest::Digest.new("sha1")
+      OpenSSL::HMAC.hexdigest(sha1, key_digest, message.to_s)
     end
   end
 end