; <EM>digest</EM></TT><BR /></DIV><P>Returns the digest of the contents of the stream specified by <EM>stream</EM>.  <TT>READ-BYTE</TT> must be a legal operation on <EM>stream</EM>
and return an <TT>(UNSIGNED-BYTE 8)</TT>.  In a similar fashion, <TT>READ-SEQUENCE</TT> on <EM>stream</EM> must support reading into a <TT>(SIMPLE-ARRAY (UNSIGNED-BYTE 8))</TT>.  <EM>digest</EM> and <EM>digest-start</EM> are as in <A HREF="#produce-digest" STYLE="symbol">produce-digest</A>.</P><P>If <EM>buffer</EM> is provided, i