src/auth/digest/Scheme.cc

   1 /*
   2  * Copyright (C) 1996-2014 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 #include "squid.h"
  10 #include "auth/digest/Config.h"
  11 #include "auth/digest/Scheme.h"
  12 #include "Debug.h"
  13 #include "globals.h"
  14 #include "helper.h"
  15
  16 Auth::Scheme::Pointer Auth::Digest::Scheme::_instance = NULL;
  17
  18 Auth::Scheme::Pointer
  19 Auth::Digest::Scheme::GetInstance()
  20 {
  21     if (_instance == NULL) {
  22         _instance = new Auth::Digest::Scheme();
  23         AddScheme(_instance);
  24     }
  25     return _instance;
  26 }
  27
  28 char const *
  29 Auth::Digest::Scheme::type() const
  30 {
  31     return "digest";
  32 }
  33
  34 void
  35 Auth::Digest::Scheme::shutdownCleanup()
  36 {
  37     if (_instance == NULL)
  38         return;
  39
  40     PurgeCredentialsCache();
  41     authenticateDigestNonceShutdown();
  42
  43     _instance = NULL;
  44     debugs(29, DBG_CRITICAL, "Shutdown: Digest authentication.");
  45 }
  46
  47 Auth::Config *
  48 Auth::Digest::Scheme::createConfig()
  49 {
  50     Auth::Digest::Config *digestCfg = new Auth::Digest::Config;
  51     return dynamic_cast<Auth::Config*>(digestCfg);
  52 }
  53
  54 void
  55 Auth::Digest::Scheme::PurgeCredentialsCache(void)
  56 {
  57     AuthUserHashPointer *usernamehash;
  58
  59     debugs(29, 2, HERE << "Erasing Digest authentication credentials from username cache.");
  60     hash_first(proxy_auth_username_cache);
  61
  62     while ((usernamehash = static_cast<AuthUserHashPointer *>(hash_next(proxy_auth_username_cache)) )) {
  63         Auth::User::Pointer auth_user = usernamehash->user();
  64
  65         if (strcmp(auth_user->config->type(), "digest") == 0) {
  66             hash_remove_link(proxy_auth_username_cache, static_cast<hash_link*>(usernamehash));
  67             delete usernamehash;
  68         }
  69     }
  70 }
  71