src/auth/Config.h

   1 /*
   2  *
   3  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   4  * ----------------------------------------------------------
   5  *
   6  *  Squid is the result of efforts by numerous individuals from
   7  *  the Internet community; see the CONTRIBUTORS file for full
   8  *  details.   Many organizations have provided support for Squid's
   9  *  development; see the SPONSORS file for full details.  Squid is
  10  *  Copyrighted (C) 2001 by the Regents of the University of
  11  *  California; see the COPYRIGHT file for full details.  Squid
  12  *  incorporates software developed and/or copyrighted by other
  13  *  sources; see the CREDITS file for full details.
  14  *
  15  *  This program is free software; you can redistribute it and/or modify
  16  *  it under the terms of the GNU General Public License as published by
  17  *  the Free Software Foundation; either version 2 of the License, or
  18  *  (at your option) any later version.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  *  GNU General Public License for more details.
  24  *
  25  *  You should have received a copy of the GNU General Public License
  26  *  along with this program; if not, write to the Free Software
  27  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  28  *
  29  */
  30 #ifndef SQUID_AUTH_CONFIG_H
  31 #define SQUID_AUTH_CONFIG_H
  32
  33 #if USE_AUTH
  34
  35 #include "auth/UserRequest.h"
  36 #include "HelperChildConfig.h"
  37
  38 class StoreEntry;
  39 class HttpReply;
  40 class HttpRequest;
  41 class wordlist;
  42
  43 /* for http_hdr_type parameters-by-value */
  44 #include "HttpHeader.h"
  45
  46 namespace Auth
  47 {
  48
  49 /**
  50  * \ingroup AuthAPI
  51  * \par
  52  * I am the configuration for an auth scheme.
  53  * Currently each scheme has only one instance of me,
  54  * but this may change.
  55  * \par
  56  * This class is treated like a ref counted class.
  57  * If the children ever stop being singletons, implement the
  58  * ref counting...
  59  */
  60 class Config
  61 {
  62
  63 public:
  64     static UserRequest::Pointer CreateAuthUser(const char *proxy_auth);
  65
  66     static Config *Find(const char *proxy_auth);
  67     Config() : authenticateChildren(20), authenticateProgram(NULL) {}
  68
  69     virtual ~Config() {}
  70
  71     /**
  72      * Used by squid to determine whether the auth module has successfully initialised itself with the current configuration.
  73      *
  74      \retval true       Authentication Module loaded and running.
  75      \retval false      No Authentication Module loaded.
  76      */
  77     virtual bool active() const = 0;
  78
  79     /**
  80      * new decode API: virtual factory pattern
  81      \par
  82      * Responsible for decoding the passed authentication header, creating or
  83      * linking to a AuthUser object and for storing any needed details to complete
  84      * authentication in Auth::UserRequest::authenticate().
  85      *
  86      \param proxy_auth  Login Pattern to parse.
  87      \retval *          Details needed to authenticate.
  88      */
  89     virtual UserRequest::Pointer decode(char const *proxy_auth) = 0;
  90
  91     /**
  92      * squid is finished with this config, release any unneeded resources.
  93      * If a singleton, delete will not occur. if not a singleton (future),
  94      * delete will occur when no references are held.
  95      *
  96      \todo we need a 'done for reconfigure' and a 'done permanently' concept.
  97      */
  98     virtual void done() = 0;
  99
 100     /**
 101      * The configured function is used to see if the auth module has been given valid
 102      * parameters and is able to handle authentication requests.
 103      *
 104      \retval true       Authentication Module configured ready for use.
 105      \retval false      Not configured or Configuration Error.
 106      *                  No other module functions except Shutdown/Dump/Parse/FreeConfig will be called by Squid.
 107      */
 108     virtual bool configured() const = 0;
 109
 110     /**
 111      * Shutdown just the auth helpers.
 112      * For use by log rotate etc. where auth needs to stay running, with the helpers restarted.
 113      */
 114     virtual void rotateHelpers(void) = 0;
 115
 116     /**
 117      * Responsible for writing to the StoreEntry the configuration parameters that a user
 118      * would put in a config file to recreate the running configuration.
 119      */
 120     virtual void dump(StoreEntry *, const char *, Config *) = 0;
 121
 122     /** add headers as needed when challenging for auth */
 123     virtual void fixHeader(UserRequest::Pointer, HttpReply *, http_hdr_type, HttpRequest *) = 0;
 124
 125     /** prepare to handle requests */
 126     virtual void init(Config *) = 0;
 127
 128     /** expose any/all statistics to a CacheManager */
 129     virtual void registerWithCacheManager(void);
 130
 131     /** parse config options */
 132     virtual void parse(Config *, int, char *) = 0;
 133
 134     /** the http string id */
 135     virtual const char * type() const = 0;
 136
 137 public:
 138     HelperChildConfig authenticateChildren;
 139     wordlist *authenticateProgram; ///< Helper program to run, includes all parameters
 140 };
 141
 142 typedef Vector<Config *> ConfigVector;
 143
 144 extern ConfigVector TheConfig;
 145
 146 } // namespace Auth
 147
 148 #endif /* USE_AUTH */
 149 #endif /* SQUID_AUTHCONFIG_H */