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/*
* $Id: digest_parser.h,v 1.2 2005/06/16 11:37:54 miconda Exp $
*
* Digest credentials parser
*
* Copyright (C) 2001-2003 FhG Fokus
*
* This file is part of openser, a free SIP server.
*
* openser 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
*
* openser 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
*
* History:
* -------
* 2003-03-15: Duplicate algorithm in dig_cred_t removed (janakj)
*/
#ifndef DIGEST_PARSER_H
#define DIGEST_PARSER_H
#include "../../str.h"
/* Type of algorithm used */
typedef enum alg {
ALG_UNSPEC = 0, /* Algorithm parameter not specified */
ALG_MD5 = 1, /* MD5 - default value*/
ALG_MD5SESS = 2, /* MD5-Session */
ALG_OTHER = 4 /* Unknown */
} alg_t;
/* Quality Of Protection used */
typedef enum qop_type {
QOP_UNSPEC = 0, /* QOP parameter not present in response */
QOP_AUTH = 1, /* Authentication only */
QOP_AUTHINT = 2, /* Authentication with integrity checks */
QOP_OTHER = 4 /* Unknown */
} qop_type_t;
/* Algorithm structure */
struct algorithm {
str alg_str; /* The original string representation */
alg_t alg_parsed; /* Parsed value */
};
/* QOP structure */
struct qp {
str qop_str; /* The original string representation */
qop_type_t qop_parsed; /* Parsed value */
};
/* Username structure */
struct username {
str whole; /* The whole username parameter value */
str user; /* username part only */
str domain; /* Domain part only */
};
/*
* Parsed digest credentials
*/
typedef struct dig_cred {
struct username username; /* Username */
str realm; /* Realm */
str nonce; /* Nonce value */
str uri; /* URI */
str response; /* Response string */
struct algorithm alg; /* Type of algorithm used */
str cnonce; /* Cnonce value */
str opaque; /* Opaque data string */
struct qp qop; /* Quality Of Protection */
str nc; /* Nonce count parameter */
} dig_cred_t;
/*
* Macro to obtain the value of realm. The macro would first
* check if there is any @domain part in the username and if
* so, it will be returned as the value of realm. This hack is
* ofter used to protect realm using the digest (username parameter
* is protected by the response hash) and also to allow subscribers
* to specify a different domain part than the one in realm parameter
*/
#define GET_REALM(cred) \
(((cred)->username.domain.len && (cred)->username.domain.s) ? \
&(cred)->username.domain : \
&(cred)->realm)
/*
* Initialize a digest credentials structure
*/
void init_dig_cred(dig_cred_t* _c);
/*
* We support Digest authentication only
*
* Returns:
* 0 - if everything is OK
* -1 - Error while parsing
* 1 - Unknown scheme
*/
int parse_digest_cred(str* _s, dig_cred_t* _c);
#endif /* DIGEST_PARSER_H */
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