src/auth/digest/Scheme.cc

   1 /*
   2  * $Id$
   3  *
   4  *
   5  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   6  * ----------------------------------------------------------
   7  *
   8  *  Squid is the result of efforts by numerous individuals from
   9  *  the Internet community; see the CONTRIBUTORS file for full
  10  *  details.   Many organizations have provided support for Squid's
  11  *  development; see the SPONSORS file for full details.  Squid is
  12  *  Copyrighted (C) 2001 by the Regents of the University of
  13  *  California; see the COPYRIGHT file for full details.  Squid
  14  *  incorporates software developed and/or copyrighted by other
  15  *  sources; see the CREDITS file for full details.
  16  *
  17  *  This program is free software; you can redistribute it and/or modify
  18  *  it under the terms of the GNU General Public License as published by
  19  *  the Free Software Foundation; either version 2 of the License, or
  20  *  (at your option) any later version.
  21  *
  22  *  This program is distributed in the hope that it will be useful,
  23  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  *  GNU General Public License for more details.
  26  *
  27  *  You should have received a copy of the GNU General Public License
  28  *  along with this program; if not, write to the Free Software
  29  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  30  *
  31  */
  32
  33 #include "squid.h"
  34 #include "auth/digest/Scheme.h"
  35 #include "Debug.h"
  36 #include "globals.h"
  37 #include "helper.h"
  38
  39 Auth::Scheme::Pointer Auth::Digest::Scheme::_instance = NULL;
  40
  41 Auth::Scheme::Pointer
  42 Auth::Digest::Scheme::GetInstance()
  43 {
  44     if (_instance == NULL) {
  45         _instance = new Auth::Digest::Scheme();
  46         AddScheme(_instance);
  47     }
  48     return _instance;
  49 }
  50
  51 char const *
  52 Auth::Digest::Scheme::type() const
  53 {
  54     return "digest";
  55 }
  56
  57 void
  58 Auth::Digest::Scheme::shutdownCleanup()
  59 {
  60     if (_instance == NULL)
  61         return;
  62
  63     PurgeCredentialsCache();
  64     authenticateDigestNonceShutdown();
  65
  66     _instance = NULL;
  67     debugs(29, DBG_CRITICAL, "Shutdown: Digest authentication.");
  68 }
  69
  70 Auth::Config *
  71 Auth::Digest::Scheme::createConfig()
  72 {
  73     Auth::Digest::Config *digestCfg = new Auth::Digest::Config;
  74     return dynamic_cast<Auth::Config*>(digestCfg);
  75 }
  76
  77 void
  78 Auth::Digest::Scheme::PurgeCredentialsCache(void)
  79 {
  80     AuthUserHashPointer *usernamehash;
  81
  82     debugs(29, 2, HERE << "Erasing Digest authentication credentials from username cache.");
  83     hash_first(proxy_auth_username_cache);
  84
  85     while ((usernamehash = static_cast<AuthUserHashPointer *>(hash_next(proxy_auth_username_cache)) )) {
  86         Auth::User::Pointer auth_user = usernamehash->user();
  87
  88         if (strcmp(auth_user->config->type(), "digest") == 0) {
  89             hash_remove_link(proxy_auth_username_cache, static_cast<hash_link*>(usernamehash));
  90             delete usernamehash;
  91         }
  92     }
  93 }