/*
  * HTTP authentication
  * Copyright (c) 2010 Martin Storsjo
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg 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
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #ifndef AVFORMAT_HTTPAUTH_H
 #define AVFORMAT_HTTPAUTH_H
 
 /**
  * Authentication types, ordered from weakest to strongest.
  */
 typedef enum HTTPAuthType {
     HTTP_AUTH_NONE = 0,    /**< No authentication specified */
     HTTP_AUTH_BASIC,       /**< HTTP 1.0 Basic auth from RFC 1945
                              *  (also in RFC 2617) */

     HTTP_AUTH_DIGEST,      /**< HTTP 1.1 Digest auth from RFC 2617 */

 } HTTPAuthType;
 

 typedef struct DigestParams {

     char nonce[300];       /**< Server specified nonce */
     char algorithm[10];    /**< Server specified digest algorithm */
     char qop[30];          /**< Quality of protection, containing the one
                              *  that we've chosen to use, from the
                              *  alternatives that the server offered. */
     char opaque[300];      /**< A server-specified string that should be
                              *  included in authentication responses, not
                              *  included in the actual digest calculation. */

     char stale[10];        /**< The server indicated that the auth was ok,
                              * but needs to be redone with a new, non-stale
                              * nonce. */

     int nc;                /**< Nonce count, the number of earlier replies
                              *  where this particular nonce has been used. */
 } DigestParams;
 

 /**
  * HTTP Authentication state structure. Must be zero-initialized
  * before used with the functions below.
  */

 typedef struct HTTPAuthState {

     /**
      * The currently chosen auth type.
      */

     int auth_type;

     /**
      * Authentication realm
      */
     char realm[200];

     /**
      * The parameters specifiec to digest authentication.
      */
     DigestParams digest_params;

     /**
      * Auth ok, but needs to be resent with a new nonce.
      */
     int stale;

 } HTTPAuthState;
 
 void ff_http_auth_handle_header(HTTPAuthState *state, const char *key,
                                 const char *value);
 char *ff_http_auth_create_response(HTTPAuthState *state, const char *auth,
                                    const char *path, const char *method);
 
 #endif /* AVFORMAT_HTTPAUTH_H */