digest.h

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/*
 * $Id: digest.h 4518 2008-07-28 15:39:28Z henningw $
 *
 * Digest credentials parser interface
 *
 * Copyright (C) 2001-2003 FhG Fokus
 *
 * This file is part of Kamailio, a free SIP server.
 *
 * Kamailio 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
 *
 * Kamailio 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 "digest_parser.h"
#include "../hf.h"         /* struct hdr_field */
#include "../msg_parser.h"


typedef struct auth_body {
        /* This is pointer to header field containing
         * parsed authorized digest credentials. This
         * pointer is set in sip_msg->{authorization,proxy_auth}
         * hooks.
         *
         * This is necessary for functions called after
         * {www,proxy}_authorize, these functions need to know
         * which credentials are authorized and they will simply
         * look into 
         * sip_msg->{authorization,proxy_auth}->parsed->authorized
         */
   struct hdr_field* authorized;
   dig_cred_t digest;           /* Parsed digest credentials */
   unsigned char stale;         /* Flag is set if nonce is stale */
} auth_body_t;


/*
 * Errors returned by check_dig_cred
 */
typedef enum dig_err {
   E_DIG_OK = 0,        /* Everything is OK */
   E_DIG_USERNAME  = 1, /* Username missing */
   E_DIG_REALM = 2,     /* Realm missing */
   E_DIG_NONCE = 4,     /* Nonce value missing */
   E_DIG_URI = 8,       /* URI missing */
   E_DIG_RESPONSE = 16, /* Response missing */
   E_DIG_CNONCE = 32,   /* CNONCE missing */
   E_DIG_NC = 64,       /* Nonce-count missing */
   E_DIG_DOMAIN = 128   /* Username domain != realm */
} dig_err_t;


/*
 * Parse digest credentials
 */
int parse_credentials(struct hdr_field* _h);


/*
 * Free all memory associated with parsed
 * structures
 */
void free_credentials(auth_body_t** _b);


/*
 * Print dig_cred structure to stdout
 */
void print_cred(dig_cred_t* _c);


/*
 * Mark credentials as authorized
 */
int mark_authorized_cred(struct sip_msg* _m, struct hdr_field* _h);


/*
 * Get pointer to authorized credentials
 */
int get_authorized_cred(struct hdr_field* _f, struct hdr_field** _h);


/*
 * Check if credentials are correct
 * (check of semantics)
 */
dig_err_t check_dig_cred(dig_cred_t* _c);


#endif /* DIGEST_H */