hmac-md5.h

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/*
 * libEtPan! -- a mail stuff library
 *
 * Copyright (C) 2001, 2005 - DINH Viet Hoa
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the libEtPan! project nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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 */
 
/* hmac-md5.h -- HMAC_MD5 functions
 */
 
/*
 * $Id: hmac-md5.h,v 1.1.1.1 2005/03/18 20:17:28 zautrix Exp $
 */
 
#ifndef HMAC_MD5_H
#define HMAC_MD5_H 1
 
namespace md5
{
 
 
 
#define HMAC_MD5_SIZE 16
 
    /* intermediate MD5 context */
    typedef struct HMAC_MD5_CTX_s {
        MD5_CTX ictx, octx;
    } HMAC_MD5_CTX;
 
    /* intermediate HMAC state
    *  values stored in network byte order (Big Endian)
    */
    typedef struct HMAC_MD5_STATE_s {
        UINT4 istate[4];
        UINT4 ostate[4];
    } HMAC_MD5_STATE;
 
    /* One step hmac computation
    *
    * digest may be same as text or key
    */
    void hmac_md5(const unsigned char *text, int text_len,
        const unsigned char *key, int key_len,
        unsigned char digest[HMAC_MD5_SIZE]);
 
    /* create context from key
    */
    void hmac_md5_init(HMAC_MD5_CTX *hmac,
        const unsigned char *key, int key_len);
 
    /* precalculate intermediate state from key
    */
    void hmac_md5_precalc(HMAC_MD5_STATE *hmac,
        const unsigned char *key, int key_len);
 
    /* initialize context from intermediate state
    */
    void hmac_md5_import(HMAC_MD5_CTX *hmac, HMAC_MD5_STATE *state);
 
#define hmac_md5_update(hmac, text, text_len) MD5Update(&(hmac)->ictx, (text), (text_len))
 
    /* finish hmac from intermediate result.  Intermediate result is zeroed.
    */
    void hmac_md5_final(unsigned char digest[HMAC_MD5_SIZE],
        HMAC_MD5_CTX *hmac);
 
}
 
#endif /* HMAC_MD5_H */