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2.1     ! kahan       1: <HTML>
        !             2: <HEAD>
        !             3:   <TITLE>W3C Sample Code Library libwww Generic Message Digest
        !             4:   Interface</Title>
        !             5: </HEAD>
        !             6: <BODY>
        !             7: <H1>
        !             8:   Generic Message Digest Interface
        !             9: </H1>
        !            10: <PRE>
        !            11: /*
        !            12: **     (c) COPYRIGHT W3C, INRIA 1998.
        !            13: **     Please first read the full copyright statement in the file COPYRIGHT.
        !            14: */
        !            15: </PRE>
        !            16: <P>
        !            17: 
        !            18: Contains a generic interface to the message digest algorithms, inspired
        !            19: from the RSA-Euro toolkit. For the moment, it only covers MD5.
        !            20: SHA and other algorithms could be added later on. This code is only
        !            21: used during message digest authentication.
        !            22: 
        !            23: AUTHORS:
        !            24:    JKO Jose Kahan       jose@w3.org
        !            25: 
        !            26: HISTORY:
        !            27:         Dec 98 JK      Created the module from scratch
        !            28: 
        !            29: <P>
        !            30: This module is implemented by <A HREF="HTDigest.c">HTDigest.c</A>, and it
        !            31: is a part of the <A HREF="http://www.w3.org/Library/">W3C Sample Code
        !            32: Library</A>.
        !            33: <PRE>
        !            34: #ifndef HTDigest_H
        !            35: #define HTDigest_H
        !            36: /* Library include files */
        !            37: #include "WWWLib.h"
        !            38: /* add the MD algorithm header files here below */
        !            39: #include "global.h"
        !            40: #include "md5.h"
        !            41: </PRE>
        !            42: <H2>
        !            43:   Interface to message digest algorithms
        !            44: </H2>
        !            45: <P>
        !            46: The list of known message digest algorithms
        !            47: <PRE>
        !            48: #define HTDaMD5 1
        !            49: </PRE>
        !            50: <P>
        !            51: This is our general digest context structure. If you add a new
        !            52: algorithm, include its context in the union.
        !            53: <PRE>
        !            54: typedef struct _HTDigestContext {
        !            55:   int algorithm;          
        !            56:     union { 
        !            57:            MD5_CTX md5;
        !            58:     } context;
        !            59: } HTDigestContext;
        !            60: </PRE>
        !            61: <P>
        !            62: This is a set of generic functions for generating a message digest
        !            63: <PRE>
        !            64: extern BOOL HTDigest_init (HTDigestContext *context, int digesttype);
        !            65: extern BOOL HTDigest_update (HTDigestContext *context, char *input, unsigned int inputLen);
        !            66: extern BOOL HTDigest_final (unsigned char *digest, HTDigestContext *context);
        !            67: </PRE>
        !            68: <PRE>
        !            69: #endif /* NOT HTDigest_H */
        !            70: </PRE>
        !            71: <P>
        !            72:   <HR>
        !            73: <ADDRESS>
        !            74:   @(#) $Id: HTDigest.html,v 1.1 1998/12/15 12:50:21 cvs Exp $
        !            75: </ADDRESS>
        !            76: </BODY></HTML>
        !            77: 
        !            78: 
        !            79: 
        !            80: 
        !            81: 
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