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 "helper.h"
  36
  37 Auth::Scheme::Pointer Auth::Digest::Scheme::_instance = NULL;
  38
  39 Auth::Scheme::Pointer
  40 Auth::Digest::Scheme::GetInstance()
  41 {
  42     if (_instance == NULL) {
  43         _instance = new Auth::Digest::Scheme();
  44         AddScheme(_instance);
  45     }
  46     return _instance;
  47 }
  48
  49 char const *
  50 Auth::Digest::Scheme::type() const
  51 {
  52     return "digest";
  53 }
  54
  55 void
  56 Auth::Digest::Scheme::shutdownCleanup()
  57 {
  58     if (_instance == NULL)
  59         return;
  60
  61     PurgeCredentialsCache();
  62     authenticateDigestNonceShutdown();
  63
  64     _instance = NULL;
  65     debugs(29, DBG_CRITICAL, "Shutdown: Digest authentication.");
  66 }
  67
  68 Auth::Config *
  69 Auth::Digest::Scheme::createConfig()
  70 {
  71     Auth::Digest::Config *digestCfg = new Auth::Digest::Config;
  72     return dynamic_cast<Auth::Config*>(digestCfg);
  73 }
  74
  75 void
  76 Auth::Digest::Scheme::PurgeCredentialsCache(void)
  77 {
  78     AuthUserHashPointer *usernamehash;
  79
  80     debugs(29, 2, HERE << "Erasing Digest authentication credentials from username cache.");
  81     hash_first(proxy_auth_username_cache);
  82
  83     while ((usernamehash = static_cast<AuthUserHashPointer *>(hash_next(proxy_auth_username_cache)) )) {
  84         Auth::User::Pointer auth_user = usernamehash->user();
  85
  86         if (strcmp(auth_user->config->type(), "digest") == 0) {
  87             hash_remove_link(proxy_auth_username_cache, static_cast<hash_link*>(usernamehash));
  88             delete usernamehash;
  89         }
  90     }
  91 }