 constructs are
   used by IPSEC [OG,CG] and other protocols to authenticate messages.
   The test cases and results provided in this document are meant to be
   used as a conformance test for HMAC-MD5 and HMAC-SHA-1
<br>
   implementations.
<p>
<dt><strong><a name="sec-1.">1.</a> Introduction</strong><dd>
<p>
   The general method for constructing a HMAC message authentication
   function using a particular hash function is described in section 2
   of [HMAC]. We will not repeat the description here. Secti