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138 lines
3.8 KiB
138 lines
3.8 KiB
/*
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* $Id$
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*
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* Digest credentials parser
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*
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* Copyright (C) 2001-2003 FhG Fokus
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*
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* This file is part of ser, a free SIP server.
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*
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* ser is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version
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*
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* For a license to use the ser software under conditions
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* other than those described here, or to purchase support for this
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* software, please contact iptel.org by e-mail at the following addresses:
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* info@iptel.org
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*
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* ser is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* History:
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* -------
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*
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* 2003-03-15: Duplicate algorithm in dig_cred_t removed (janakj)
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*/
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#ifndef DIGEST_PARSER_H
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#define DIGEST_PARSER_H
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#include "../../str.h"
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/* Type of algorithm used */
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typedef enum alg {
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ALG_UNSPEC = 0, /* Algorithm parameter not specified */
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ALG_MD5 = 1, /* MD5 - default value*/
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ALG_MD5SESS = 2, /* MD5-Session */
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ALG_OTHER = 4 /* Unknown */
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} alg_t;
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/* Quality Of Protection used */
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typedef enum qop_type {
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QOP_UNSPEC = 0, /* QOP parameter not present in response */
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QOP_AUTH = 1, /* Authentication only */
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QOP_AUTHINT = 2, /* Authentication with integrity checks */
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QOP_OTHER = 4 /* Unknown */
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} qop_type_t;
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/* Algorithm structure */
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struct algorithm {
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str alg_str; /* The original string representation */
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alg_t alg_parsed; /* Parsed value */
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};
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/* QOP structure */
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struct qp {
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str qop_str; /* The original string representation */
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qop_type_t qop_parsed; /* Parsed value */
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};
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/* Username structure */
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struct username {
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str whole; /* The whole username parameter value */
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str user; /* username part only */
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str domain; /* Domain part only */
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};
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/*
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* Parsed digest credentials
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*/
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typedef struct dig_cred {
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struct username username; /* Username */
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str realm; /* Realm */
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str nonce; /* Nonce value */
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str uri; /* digest-uri, duplicated Request-URI of the Request-Line */
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str response; /* Response string */
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struct algorithm alg; /* Type of algorithm used */
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str cnonce; /* Cnonce value */
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str opaque; /* Opaque data string */
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struct qp qop; /* Quality Of Protection */
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str nc; /* Nonce count parameter */
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} dig_cred_t;
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/*
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* Macro to obtain the value of realm. The macro would first
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* check if there is any @domain part in the username and if
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* so, it will be returned as the value of realm. This hack is
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* ofter used to protect realm using the digest (username parameter
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* is protected by the response hash) and also to allow subscribers
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* to specify a different domain part than the one in realm parameter
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*/
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#define GET_REALM(cred) \
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(((cred)->username.domain.len && (cred)->username.domain.s) ? \
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&(cred)->username.domain : \
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&(cred)->realm)
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/*
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* Initialize a digest credentials structure
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*/
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void init_dig_cred(dig_cred_t* _c);
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/*
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* We support Digest authentication only
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*
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* Returns:
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* 0 - if everything is OK
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* -1 - Error while parsing
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* 1 - Unknown scheme
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*/
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int parse_digest_cred(str* _s, dig_cred_t* _c);
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/*
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* Parse qop string
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*/
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void parse_qop(struct qp* _q);
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#endif /* DIGEST_PARSER_H */
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