# Generic Message Digest Interface

    /*
    **	(c) COPYRIGHT W3C, INRIA 1998.
    **	Please first read the full copyright statement in the file COPYRIGHT.
    */

Contains a generic interface to the message digest algorithms, inspired from the RSA-Euro toolkit. For the moment, it only covers MD5. SHA and other algorithms could be added later on. This code is only used during message digest authentication. AUTHORS: JK Jose Kahan jose@w3.org HISTORY: Dec 98 JK Created the module from scratch

This module is implemented by HTDigest.c, and it is a part of the W3C Sample Code Library.

    #ifndef HTDigest_H
    #define HTDigest_H
    /* Library include files */
    #include "WWWLib.h"
    /* add the MD algorithm header files here below */
    #include "md5.h"

## Interface to message digest algorithms

The list of known message digest algorithms

    #define HTDaMD5 1

This is our general digest context structure. If you add a new algorithm, include its context in the union.

    typedef struct _HTDigestContext {
      int algorithm;
        union {
               MD5_CTX md5;
        } context;
    } HTDigestContext;

This is a set of generic functions for generating a message digest

    extern BOOL HTDigest_init (HTDigestContext *context, int digesttype);
    extern BOOL HTDigest_update (HTDigestContext *context, char *input, unsigned int inputLen);
    extern BOOL HTDigest_final (unsigned char *digest, HTDigestContext *context);

    #endif	/* NOT HTDigest_H */