net/http/url_security_manager_win.cc

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "net/http/url_security_manager.h"
   6
   7 #include <urlmon.h>
   8 #pragma comment(lib, "urlmon.lib")
   9
  10 #include "base/strings/string_util.h"
  11 #include "base/strings/utf_string_conversions.h"
  12 #include "base/win/scoped_comptr.h"
  13 #include "net/http/http_auth_filter.h"
  14 #include "url/gurl.h"
  15
  16 // The Windows implementation of URLSecurityManager uses WinINet/IE's
  17 // URL security zone manager.  See the MSDN page "URL Security Zones" at
  18 // http://msdn.microsoft.com/en-us/library/ms537021(VS.85).aspx for more
  19 // info on the Internet Security Manager and Internet Zone Manager objects.
  20 //
  21 // On Windows, we honor the WinINet/IE settings and group policy related to
  22 // URL Security Zones.  See the Microsoft Knowledge Base article 182569
  23 // "Internet Explorer security zones registry entries for advanced users"
  24 // (http://support.microsoft.com/kb/182569) for more info on these registry
  25 // keys.
  26
  27 namespace net {
  28
  29 class URLSecurityManagerWin : public URLSecurityManager {
  30  public:
  31   explicit URLSecurityManagerWin(const HttpAuthFilter* whitelist_delegate);
  32
  33   // URLSecurityManager methods:
  34   virtual bool CanUseDefaultCredentials(const GURL& auth_origin) const;
  35   virtual bool CanDelegate(const GURL& auth_origin) const;
  36
  37  private:
  38   bool EnsureSystemSecurityManager();
  39
  40   base::win::ScopedComPtr<IInternetSecurityManager> security_manager_;
  41   scoped_ptr<const HttpAuthFilter> whitelist_delegate_;
  42
  43   DISALLOW_COPY_AND_ASSIGN(URLSecurityManagerWin);
  44 };
  45
  46 URLSecurityManagerWin::URLSecurityManagerWin(
  47     const HttpAuthFilter* whitelist_delegate)
  48     : whitelist_delegate_(whitelist_delegate) {
  49 }
  50
  51 bool URLSecurityManagerWin::CanUseDefaultCredentials(
  52     const GURL& auth_origin) const {
  53   if (!const_cast<URLSecurityManagerWin*>(this)->EnsureSystemSecurityManager())
  54     return false;
  55
  56   base::string16 url16 = base::ASCIIToUTF16(auth_origin.spec());
  57   DWORD policy = 0;
  58   HRESULT hr;
  59   hr = security_manager_->ProcessUrlAction(url16.c_str(),
  60                                            URLACTION_CREDENTIALS_USE,
  61                                            reinterpret_cast<BYTE*>(&policy),
  62                                            sizeof(policy), NULL, 0,
  63                                            PUAF_NOUI, 0);
  64   if (FAILED(hr)) {
  65     LOG(ERROR) << "IInternetSecurityManager::ProcessUrlAction failed: " << hr;
  66     return false;
  67   }
  68
  69   // Four possible policies for URLACTION_CREDENTIALS_USE.  See the MSDN page
  70   // "About URL Security Zones" at
  71   // http://msdn.microsoft.com/en-us/library/ms537183(VS.85).aspx
  72   switch (policy) {
  73     case URLPOLICY_CREDENTIALS_SILENT_LOGON_OK:
  74       return true;
  75     case URLPOLICY_CREDENTIALS_CONDITIONAL_PROMPT: {
  76       // This policy means "prompt the user for permission if the resource is
  77       // not located in the Intranet zone".  TODO(wtc): Note that it's
  78       // prompting for permission (to use the default credentials), as opposed
  79       // to prompting the user to enter a user name and password.
  80
  81       // URLZONE_LOCAL_MACHINE 0
  82       // URLZONE_INTRANET      1
  83       // URLZONE_TRUSTED       2
  84       // URLZONE_INTERNET      3
  85       // URLZONE_UNTRUSTED     4
  86       DWORD zone = 0;
  87       hr = security_manager_->MapUrlToZone(url16.c_str(), &zone, 0);
  88       if (FAILED(hr)) {
  89         LOG(ERROR) << "IInternetSecurityManager::MapUrlToZone failed: " << hr;
  90         return false;
  91       }
  92       return zone <= URLZONE_INTRANET;
  93     }
  94     case URLPOLICY_CREDENTIALS_MUST_PROMPT_USER:
  95       return false;
  96     case URLPOLICY_CREDENTIALS_ANONYMOUS_ONLY:
  97       // TODO(wtc): we should fail the authentication.
  98       return false;
  99     default:
 100       NOTREACHED();
 101       return false;
 102   }
 103 }
 104
 105 bool URLSecurityManagerWin::CanDelegate(const GURL& auth_origin) const {
 106   // TODO(cbentzel): Could this just use the security zone as well? Apparently
 107   //                 this is what IE does as well.
 108   if (whitelist_delegate_.get())
 109     return whitelist_delegate_->IsValid(auth_origin, HttpAuth::AUTH_SERVER);
 110   return false;
 111 }
 112
 113 bool URLSecurityManagerWin::EnsureSystemSecurityManager() {
 114   if (!security_manager_.get()) {
 115     HRESULT hr = CoInternetCreateSecurityManager(NULL,
 116                                                  security_manager_.Receive(),
 117                                                  NULL);
 118     if (FAILED(hr) || !security_manager_.get()) {
 119       LOG(ERROR) << "Unable to create the Windows Security Manager instance";
 120       return false;
 121     }
 122   }
 123   return true;
 124 }
 125
 126 // static
 127 URLSecurityManager* URLSecurityManager::Create(
 128     const HttpAuthFilter* whitelist_default,
 129     const HttpAuthFilter* whitelist_delegate) {
 130   // If we have a whitelist, just use that.
 131   if (whitelist_default)
 132     return new URLSecurityManagerWhitelist(whitelist_default,
 133                                            whitelist_delegate);
 134   return new URLSecurityManagerWin(whitelist_delegate);
 135 }
 136
 137 }  //  namespace net