+ * Revision 1.6 2001/04/19 18:24:45 mdw
+ * Provide correct key sizes for NMAC, HMAC and SSLMAC.
+ *
+ * Revision 1.5 2001/04/03 19:35:45 mdw
+ * Support the SSL HMAC variant (untested).
+ *
+ * Revision 1.4 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 1.3 2000/06/17 11:23:57 mdw
+ * New key size interface.
+ *