+ * Revision 1.5 2000/10/15 19:09:20 mdw
+ * Support HMAC mode for hash functions which need to store more state than
+ * the hash output size.
+ *
+ * Revision 1.4 2000/07/15 10:00:58 mdw
+ * New generic hash operation for copying hash contexts.
+ *
+ * Revision 1.3 2000/07/02 18:27:42 mdw
+ * (ghash->ops->done): Interface change. Passing in a null buffer pointer
+ * uses a buffer internal to the ghash object. The operation returns the
+ * address of the buffer it used. Clients of generic hashes no longer need
+ * to use dynamically allocated memory for hash results.
+ *
+ * Revision 1.2 2000/06/17 11:23:44 mdw
+ * Use secure arena for memory allocation. Minor changes in the generic
+ * hash interface.
+ *