win32.h

   1 /*
   2  * Copyright (c) 2000, Red Hat, Inc.
   3  *
   4  *     This program is free software; you can redistribute it and/or modify
   5  *     it under the terms of the GNU General Public License as published by
   6  *     the Free Software Foundation; either version 2 of the License, or
   7  *     (at your option) any later version.
   8  *
   9  *     A copy of the GNU General Public License can be found at
  10  *     http://www.gnu.org/
  11  *
  12  * Written by DJ Delorie <dj@cygnus.com>
  13  * and Robert Collins <rbtcollins@hotmail.com>
  14  *
  15  */
  16
  17 #ifndef SETUP_WIN32_H
  18 #define SETUP_WIN32_H
  19
  20 #include <string>
  21
  22 /* Any include of <windows.h> should be through this file, which wraps it in
  23  * various other handling. */
  24
  25 /* Basic Windows features only. */
  26 #define WIN32_LEAN_AND_MEAN
  27
  28 /* libstdc++-v3 _really_ dislikes min & max defined as macros. */
  29 /* As of gcc 3.3.1, it defines NOMINMAX itself, so test first,
  30  * to avoid a redefinition error */
  31 #ifndef NOMINMAX
  32 #define NOMINMAX
  33 #endif
  34
  35 /* In w32api 3.1, __declspec(dllimport) decoration is added to
  36  * certain symbols. This breaks our autoload mechanism - the symptom is
  37  * multiple declaration errors at link time. This define turns that off again.
  38  * It will default to off again in later w32api versions, but we need to work
  39  * with 3.1 for now. */
  40 #define WINBASEAPI
  41
  42 /* Require at least Internet Explorer 3, in order to have access to
  43  * sufficient Windows Common Controls features from <commctrl.h> . */
  44 #define _WIN32_IE 0x0300
  45
  46 #include <windows.h>
  47
  48 /* FIXME: The use of _access(fname, 0) as an existence check should be
  49  * replaced with a more readable idiom, and this fragment removed. */
  50 #ifndef _access
  51 #define _access access
  52 #endif
  53
  54 /* Maximum size of a SID on NT/W2K. */
  55 #define MAX_SID_LEN     40
  56
  57 /* Computes the size of an ACL in relation to the number of ACEs it
  58    should contain. */
  59 #define TOKEN_ACL_SIZE(cnt) (sizeof (ACL) + \
  60                              (cnt) * (sizeof (ACCESS_ALLOWED_ACE) + MAX_SID_LEN))
  61
  62 class SIDWrapper {
  63   public:
  64     SIDWrapper () : value (NULL) {}
  65     /* Prevent synthetics. If assignment is needed, this should be
  66        refcounting.  */
  67     SIDWrapper (SIDWrapper const &);
  68     SIDWrapper& operator= (SIDWrapper const &);
  69     ~SIDWrapper () { if (value) FreeSid (value); }
  70
  71     /* We could look at doing weird typcast overloads here,
  72        but manual access is easier for now.  */
  73     PSID &theSID () { return value; }
  74     PSID const &theSID () const { return value; }
  75   private:
  76     PSID value;
  77 };
  78
  79 class HANDLEWrapper {
  80   public:
  81     HANDLEWrapper () : value (NULL) {}
  82     /* Prevent synthetics. If assignment is needed, we should duphandles,
  83        or refcount.  */
  84     HANDLEWrapper (HANDLEWrapper const &);
  85     HANDLEWrapper& operator= (HANDLEWrapper const &);
  86     ~HANDLEWrapper () { if (value) CloseHandle (value); }
  87     HANDLE &theHANDLE () { return value; }
  88     HANDLE const &theHANDLE () const { return value; }
  89   private:
  90     HANDLE value;
  91 };
  92
  93 class TokenGroupCollection {
  94   public:
  95     TokenGroupCollection (DWORD aSize, HANDLEWrapper &aHandle) :
  96                          populated_(false), buffer(new char[aSize]),
  97                          bufferSize(aSize), token(aHandle) {}
  98     ~TokenGroupCollection () { if (buffer) delete[] buffer; }
  99
 100     /* prevent synthetics */
 101     TokenGroupCollection& operator= (TokenGroupCollection const &);
 102     TokenGroupCollection (TokenGroupCollection const &);
 103     bool find (SIDWrapper const &) const;
 104     bool populated() const { return populated_; }
 105     void populate();
 106   private:
 107     mutable bool populated_;
 108     char *buffer;
 109     DWORD bufferSize;
 110     HANDLEWrapper &token;
 111 };
 112
 113 class NTSecurity
 114 {
 115 public:
 116   NTSecurity () : nullSID (), everyOneSID (), administratorsSID (), usersSID (),
 117                   _wellKnownSIDsinitialized (false), token () {}
 118   ~NTSecurity() {}
 119
 120   /* prevent synthetics */
 121   NTSecurity& operator= (NTSecurity const &);
 122   NTSecurity (NTSecurity const &);
 123
 124   /* Set POSIX-like permissions on files.  The fname is only used for printing
 125      log output.  The function requires an open HANDLE with sufficient
 126      permissions (READ_DAC | WRITE_DAC). */
 127   void SetPosixPerms (const char *fname, HANDLE fh, mode_t mode);
 128   void resetPrimaryGroup();
 129   void setAdminGroup ();
 130   void setDefaultSecurity();
 131 private:
 132   void NoteFailedAPI (const std::string &);
 133   bool wellKnownSIDsinitialized () const { return _wellKnownSIDsinitialized; }
 134   void wellKnownSIDsinitialized (bool b) { _wellKnownSIDsinitialized = b; }
 135   void initialiseWellKnownSIDs ();
 136   void setDefaultDACL ();
 137   void setBackupPrivileges ();
 138
 139   SIDWrapper nullSID, everyOneSID, administratorsSID, usersSID;
 140   struct {
 141     TOKEN_PRIMARY_GROUP pgrp;
 142     char buf[MAX_SID_LEN];
 143   } primaryGroupSID;
 144
 145   bool _wellKnownSIDsinitialized;
 146   HANDLEWrapper token;
 147   DWORD size;
 148 };
 149
 150 extern NTSecurity nt_sec;
 151
 152 class VersionInfo
 153 {
 154   public:
 155      VersionInfo ();
 156      bool isNT () { return (v.dwPlatformId == VER_PLATFORM_WIN32_NT); }
 157      DWORD major () const { return v.dwMajorVersion; }
 158      DWORD minor () const { return v.dwMinorVersion; }
 159   private:
 160      OSVERSIONINFO v;
 161 };
 162
 163 VersionInfo& GetVer ();
 164
 165 #define IsWindowsNT() (GetVer ().isNT ())
 166 #define OSMajorVersion() (GetVer ().major ())
 167 #define OSMinorVersion() (GetVer ().minor ())
 168
 169 #endif /* SETUP_WIN32_H */