# Cppcheck report - LibreOffice: setup_native/source/win32/customactions/shellextensions/upgrade.cxx

      1
      2
      3
      4
      5
      6
      7
      8
      9
     10
     11
     12
     13
     14
     15
     16
     17
     18
     19
     20
     21
     22
     23
     24
     25
     26
     27
     28
     29
     30
     31
     32
     33
     34
     35
     36
     37
     38
     39
     40
     41
     42
     43
     44
     45
     46
     47
     48
     49
     50
     51
     52
     53
     54
     55
     56
     57
     58
     59
     60
     61
     62
     63
     64
     65
     66
     67
     68
     69
     70
     71
     72
     73
     74
     75
     76
     77
     78
     79
     80
     81
     82
     83
     84
     85
     86
     87
     88
     89
     90
     91
     92
     93
     94
     95
     96
     97
     98
     99
    100
    101
    102
    103
    104
    105
    106
    107
    108
    109
    110
    111
    112
    113
    114
    115
    116
    117
    118
    119
    120
    121
    122
    123
    124
    125
    126
    127
    128
    129
    130
    131
    132
    133
    134
    135
    136
    137
    138
    139
    140
    141
    142
    143
    144
    145
    146
    147
    148
    149
    150
    151
    152
    153
    154
    155
    156
    157
    158
    159
    160
    161
    162
    163
    164
    165
    166
    167
    168
    169
    170
    171
    172
    173
    174
    175
    176
    177
    178
    179
    180
    181
    182
    183
    184
    185
    186
    187
    188
    189
    190
    191
    192
    193
    194
    195
    196

    /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
    /*
     * This file is part of the LibreOffice project.
     *
     * This Source Code Form is subject to the terms of the Mozilla Public
     * License, v. 2.0. If a copy of the MPL was not distributed with this
     * file, You can obtain one at http://mozilla.org/MPL/2.0/.
     *
     * This file incorporates work covered by the following license notice:
     *
     *   Licensed to the Apache Software Foundation (ASF) under one or more
     *   contributor license agreements. See the NOTICE file distributed
     *   with this work for additional information regarding copyright
     *   ownership. The ASF licenses this file to you under the Apache
     *   License, Version 2.0 (the "License"); you may not use this file
     *   except in compliance with the License. You may obtain a copy of
     *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
     */

    #undef UNICODE
    #undef _UNICODE

    #ifdef _MSC_VER
    #pragma warning(push, 1) /* disable warnings within system headers */
    #endif
    #define WIN32_LEAN_AND_MEAN
    #include <windows.h>
    #include <msiquery.h>
    #ifdef _MSC_VER
    #pragma warning(pop)
    #endif

    #include <malloc.h>
    #include <assert.h>

    #include <tchar.h>
    #include <string>

    using namespace std;

    namespace
    {
        // The provided GUID must be without surrounding '{}'
        string GetGuidPart(const string& guid, int index)
        {
            assert((guid.length() == 36) && "No GUID or wrong format!");
            assert(((index > -1) && (index < 5)) && "Out of range!");

            if (index == 0) return string(guid.c_str(), 8);
            if (index == 1) return string(guid.c_str() + 9, 4);
            if (index == 2) return string(guid.c_str() + 14, 4);
            if (index == 3) return string(guid.c_str() + 19, 4);
            if (index == 4) return string(guid.c_str() + 24, 12);

            return string();
        }

        void Swap(char* p1, char* p2)
        {
            char tmp = *p1;
            *p1 = *p2;
            *p2 = tmp;
        }

        string Invert(const string& str)
        {
            char* buff = reinterpret_cast<char*>(_alloca(str.length()));
            strncpy(buff, str.c_str(), str.length());

            char* front = buff;
            char* back = buff + str.length() - 1;

            while (front < back)
                Swap(front++, back--);

            return string(buff, str.length());
        }

        // Convert the upgrade code (which is a GUID) according
        // to the way the windows installer does when writing it
        // to the registry
        // The first 8 bytes will be inverted, from the last
        // 8 bytes always the nibbles will be inverted for further
        // details look in the MSDN under compressed registry keys
        string ConvertGuid(const string& guid)
        {
            string convertedGuid;

            string part = GetGuidPart(guid, 0);
            convertedGuid = Invert(part);

            part = GetGuidPart(guid, 1);
            convertedGuid += Invert(part);

            part = GetGuidPart(guid, 2);
            convertedGuid += Invert(part);

            part = GetGuidPart(guid, 3);
            convertedGuid += Invert(string(part.c_str(), 2));
            convertedGuid += Invert(string(part.c_str() + 2, 2));

            part = GetGuidPart(guid, 4);
            int pos = 0;
            for (int i = 0; i < 6; i++)
            {
                convertedGuid += Invert(string(part.c_str() + pos, 2));
                pos += 2;
            }
            return convertedGuid;
        }

        string GetMsiProperty(MSIHANDLE handle, const string& sProperty)
        {
            string  result;
            TCHAR   szDummy[1] = TEXT("");
            DWORD   nChars = 0;

            if (MsiGetProperty(handle, sProperty.c_str(), szDummy, &nChars) == ERROR_MORE_DATA)
            {
                DWORD nBytes = ++nChars * sizeof(TCHAR);
                LPTSTR buffer = reinterpret_cast<LPTSTR>(_alloca(nBytes));
                ZeroMemory( buffer, nBytes );
                MsiGetProperty(handle, sProperty.c_str(), buffer, &nChars);
                result = buffer;
            }
            return  result;
        }

        inline bool IsSetMsiProperty(MSIHANDLE handle, const string& sProperty)
        {
            return (GetMsiProperty(handle, sProperty).length() > 0);
        }

        inline void UnsetMsiProperty(MSIHANDLE handle, const string& sProperty)
        {
            MsiSetProperty(handle, sProperty.c_str(), NULL);
        }

        inline void SetMsiProperty(MSIHANDLE handle, const string& sProperty)
        {
            MsiSetProperty(handle, sProperty.c_str(), TEXT("1"));
        }

        bool RegistryKeyHasUpgradeSubKey(
            HKEY hRootKey, const string& regKey, const string& upgradeKey)
        {
            HKEY hKey;
            if (RegOpenKey(hRootKey, regKey.c_str(), &hKey) == ERROR_SUCCESS)
            {
                DWORD nSubKeys;
                DWORD lLongestSubKey;

                if (RegQueryInfoKey(
                    hKey, NULL, NULL, NULL, &nSubKeys, &lLongestSubKey, NULL, NULL, NULL, NULL, NULL, NULL) == ERROR_SUCCESS)
                {
                    LPTSTR buffer = reinterpret_cast<LPTSTR>(_alloca(lLongestSubKey + 1));

                    for (DWORD i = 0; i < nSubKeys; i++)
                    {
                        LONG ret = RegEnumKey(hKey, i, buffer, lLongestSubKey + 1);
                        if ((ret == ERROR_SUCCESS) && (buffer == upgradeKey))
                            return true;
                    }
                }
            }
            return false;
        }
    } // namespace

    extern "C" UINT __stdcall SetProductInstallMode(MSIHANDLE handle)<--- The function 'SetProductInstallMode' is never used.
    {
        string upgradeCode = GetMsiProperty(handle, TEXT("UpgradeCode"));
        upgradeCode = ConvertGuid(string(upgradeCode.c_str() + 1, upgradeCode.length() - 2));

        //MessageBox(NULL, upgradeCode.c_str(), TEXT("Debug"), MB_OK);

        if (RegistryKeyHasUpgradeSubKey(
            HKEY_CURRENT_USER,
            TEXT("Software\\Microsoft\\Installer\\UpgradeCodes"),
            upgradeCode) && IsSetMsiProperty(handle, TEXT("ALLUSERS")))
        {
            UnsetMsiProperty(handle, TEXT("ALLUSERS"));
            //MessageBox(NULL, "ALLUSERS removed", "DEBUG", MB_OK);
        }
        else if (RegistryKeyHasUpgradeSubKey(
                 HKEY_LOCAL_MACHINE,
                 TEXT("Software\\Classes\\Installer\\UpgradeCodes"),
                 upgradeCode) && !IsSetMsiProperty(handle, TEXT("ALLUSERS")))
        {
            SetMsiProperty(handle, TEXT("ALLUSERS"));
            //MessageBox(NULL, "ALLUSERS set", "DEBUG", MB_OK);
        }
        return ERROR_SUCCESS;
    }

    /* vim:set shiftwidth=4 softtabstop=4 expandtab: */