@@ -26,21 +26,24 @@
  *
  * @brief A base class for SHA-224 and SHA-256.
  */
 @interface OFSHA224Or256Hash: OFObject <OFCryptoHash>
 {
+@private
 	OFSecureData *_iVarsData;
+@protected
 	struct of_sha224_or_256_hash_ivars {
 		uint32_t state[8];
 		uint64_t bits;
 		union of_sha224_or_256_hash_buffer {
 			uint8_t bytes[64];
 			uint32_t words[64];
 		} buffer;
 		size_t bufferLength;
 	} *_iVars;
+@private
 	bool _calculated;
 	OF_RESERVE_IVARS(4)
 }
 @end
 
 OF_ASSUME_NONNULL_END