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/*
* HttpAuth
*
* Copyright (C) 2004 Stefan Walter
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __DIGEST_H__
#define __DIGEST_H__
#include "httpauthd.h"
#include "md5.h"
#include <sys/time.h>
#define DIGEST_NONCE_LEN sizeof(time_t) + sizeof(unsigned int) + MD5_LEN
#define DIGEST_SECRET_LEN 16
/* Parsed Digest response from the client */
typedef struct digest_header
{
const char* scheme;
const char* realm;
const char* username;
const char* nonce;
const char* uri;
const char* method;
const char* digest;
const char* algorithm;
const char* cnonce;
const char* opaque;
const char* qop;
const char* nc;
}
digest_header_t;
typedef struct digest_context
{
digest_header_t client;
long server_nc;
const char* server_uri;
const char* server_method;
unsigned char server_userhash[MD5_LEN];
unsigned char server_ha1[MD5_LEN];
}
digest_context_t;
void digest_makeha1(unsigned char* digest, const char* user,
const char* realm, const char* password);
int digest_parse(const char* header, ha_buffer_t* buf, digest_header_t* dg);
const char* digest_challenge(ha_buffer_t* buf, const char* nonce_str,
const char* realm, const char* domains, int stale);
/*
* Validate digest headers once they've been parsed. Note that it's up
* to the caller to validate the 'username' and 'nonce' fields.
*/
int digest_check(digest_context_t* dg, const ha_context_t* opts, ha_buffer_t* buf);
int digest_pre_check(digest_context_t* dg, const ha_context_t* opts, ha_buffer_t* buf);
/* This assumes a digest_context that's been prechecked successfully */
int digest_complete_check(digest_context_t* dg, const ha_context_t* opts, ha_buffer_t* buf);
/* This assumes a digest_context that's been checked and validated successfully */
const char* digest_respond(digest_context_t* dg, ha_buffer_t* buf, unsigned char* next);
void digest_makenonce(unsigned char* nonce, unsigned char* secret, unsigned char* old);
int digest_checknonce(unsigned char* nonce, unsigned char* secret, time_t* tm);
void digest_escape (ha_buffer_t *buf, const char *orig);
#endif /* __DIGEST_H__ */
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