New upstream version 2.5~beta1upstream/2.5_beta1

1 files changed, 265 insertions, 0 deletions

diff --git a/src/openvpnmsica/msiex.c b/src/openvpnmsica/msiex.c
new file mode 100644
index 0000000..00265d0
--- /dev/null
+++ b/src/openvpnmsica/msiex.c
@@ -0,0 +1,265 @@
+/*
+ *  openvpnmsica -- Custom Action DLL to provide OpenVPN-specific support to MSI packages
+ *                  https://community.openvpn.net/openvpn/wiki/OpenVPNMSICA
+ *
+ *  Copyright (C) 2018 Simon Rozman <simon@rozman.si>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2
+ *  as published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#elif defined(_MSC_VER)
+#include <config-msvc.h>
+#endif
+
+#include "msiex.h"
+#include "../tapctl/error.h"
+
+#include <windows.h>
+#include <malloc.h>
+#include <memory.h>
+#include <msiquery.h>
+#ifdef _MSC_VER
+#pragma comment(lib, "msi.lib")
+#endif
+
+
+UINT
+msi_get_string(
+    _In_ MSIHANDLE hInstall,
+    _In_z_ LPCTSTR szName,
+    _Out_ LPTSTR *pszValue)
+{
+    if (pszValue == NULL)
+    {
+        return ERROR_BAD_ARGUMENTS;
+    }
+
+    /* Try with stack buffer first. */
+    TCHAR szBufStack[128];
+    DWORD dwLength = _countof(szBufStack);
+    UINT uiResult = MsiGetProperty(hInstall, szName, szBufStack, &dwLength);
+    if (uiResult == ERROR_SUCCESS)
+    {
+        /* Copy from stack. */
+        *pszValue = (LPTSTR)malloc(++dwLength * sizeof(TCHAR));
+        if (*pszValue == NULL)
+        {
+            msg(M_FATAL, "%s: malloc(%u) failed", dwLength * sizeof(TCHAR));
+            return ERROR_OUTOFMEMORY;
+        }
+
+        memcpy(*pszValue, szBufStack, dwLength * sizeof(TCHAR));
+        return ERROR_SUCCESS;
+    }
+    else if (uiResult == ERROR_MORE_DATA)
+    {
+        /* Allocate on heap and retry. */
+        LPTSTR szBufHeap = (LPTSTR)malloc(++dwLength * sizeof(TCHAR));
+        if (szBufHeap == NULL)
+        {
+            msg(M_FATAL, "%s: malloc(%u) failed", __FUNCTION__, dwLength * sizeof(TCHAR));
+            return ERROR_OUTOFMEMORY;
+        }
+
+        uiResult = MsiGetProperty(hInstall, szName, szBufHeap, &dwLength);
+        if (uiResult == ERROR_SUCCESS)
+        {
+            *pszValue = szBufHeap;
+        }
+        else
+        {
+            free(szBufHeap);
+        }
+        return uiResult;
+    }
+    else
+    {
+        SetLastError(uiResult); /* MSDN does not mention MsiGetProperty() to set GetLastError(). But we do have an error code. Set last error manually. */
+        msg(M_NONFATAL | M_ERRNO, "%s: MsiGetProperty failed", __FUNCTION__);
+        return uiResult;
+    }
+}
+
+
+UINT
+msi_get_record_string(
+    _In_ MSIHANDLE hRecord,
+    _In_ unsigned int iField,
+    _Out_ LPTSTR *pszValue)
+{
+    if (pszValue == NULL)
+    {
+        return ERROR_BAD_ARGUMENTS;
+    }
+
+    /* Try with stack buffer first. */
+    TCHAR szBufStack[128];
+    DWORD dwLength = _countof(szBufStack);
+    UINT uiResult = MsiRecordGetString(hRecord, iField, szBufStack, &dwLength);
+    if (uiResult == ERROR_SUCCESS)
+    {
+        /* Copy from stack. */
+        *pszValue = (LPTSTR)malloc(++dwLength * sizeof(TCHAR));
+        if (*pszValue == NULL)
+        {
+            msg(M_FATAL, "%s: malloc(%u) failed", __FUNCTION__, dwLength * sizeof(TCHAR));
+            return ERROR_OUTOFMEMORY;
+        }
+
+        memcpy(*pszValue, szBufStack, dwLength * sizeof(TCHAR));
+        return ERROR_SUCCESS;
+    }
+    else if (uiResult == ERROR_MORE_DATA)
+    {
+        /* Allocate on heap and retry. */
+        LPTSTR szBufHeap = (LPTSTR)malloc(++dwLength * sizeof(TCHAR));
+        if (szBufHeap == NULL)
+        {
+            msg(M_FATAL, "%s: malloc(%u) failed", __FUNCTION__, dwLength * sizeof(TCHAR));
+            return ERROR_OUTOFMEMORY;
+        }
+
+        uiResult = MsiRecordGetString(hRecord, iField, szBufHeap, &dwLength);
+        if (uiResult == ERROR_SUCCESS)
+        {
+            *pszValue = szBufHeap;
+        }
+        else
+        {
+            free(szBufHeap);
+        }
+        return uiResult;
+    }
+    else
+    {
+        SetLastError(uiResult); /* MSDN does not mention MsiRecordGetString() to set GetLastError(). But we do have an error code. Set last error manually. */
+        msg(M_NONFATAL | M_ERRNO, "%s: MsiRecordGetString failed", __FUNCTION__);
+        return uiResult;
+    }
+}
+
+
+UINT
+msi_format_record(
+    _In_ MSIHANDLE hInstall,
+    _In_ MSIHANDLE hRecord,
+    _Out_ LPTSTR *pszValue)
+{
+    if (pszValue == NULL)
+    {
+        return ERROR_BAD_ARGUMENTS;
+    }
+
+    /* Try with stack buffer first. */
+    TCHAR szBufStack[128];
+    DWORD dwLength = _countof(szBufStack);
+    UINT uiResult = MsiFormatRecord(hInstall, hRecord, szBufStack, &dwLength);
+    if (uiResult == ERROR_SUCCESS)
+    {
+        /* Copy from stack. */
+        *pszValue = (LPTSTR)malloc(++dwLength * sizeof(TCHAR));
+        if (*pszValue == NULL)
+        {
+            msg(M_FATAL, "%s: malloc(%u) failed", __FUNCTION__, dwLength * sizeof(TCHAR));
+            return ERROR_OUTOFMEMORY;
+        }
+
+        memcpy(*pszValue, szBufStack, dwLength * sizeof(TCHAR));
+        return ERROR_SUCCESS;
+    }
+    else if (uiResult == ERROR_MORE_DATA)
+    {
+        /* Allocate on heap and retry. */
+        LPTSTR szBufHeap = (LPTSTR)malloc(++dwLength * sizeof(TCHAR));
+        if (szBufHeap == NULL)
+        {
+            msg(M_FATAL, "%s: malloc(%u) failed", __FUNCTION__, dwLength * sizeof(TCHAR));
+            return ERROR_OUTOFMEMORY;
+        }
+
+        uiResult = MsiFormatRecord(hInstall, hRecord, szBufHeap, &dwLength);
+        if (uiResult == ERROR_SUCCESS)
+        {
+            *pszValue = szBufHeap;
+        }
+        else
+        {
+            free(szBufHeap);
+        }
+        return uiResult;
+    }
+    else
+    {
+        SetLastError(uiResult); /* MSDN does not mention MsiFormatRecord() to set GetLastError(). But we do have an error code. Set last error manually. */
+        msg(M_NONFATAL | M_ERRNO, "%s: MsiFormatRecord failed", __FUNCTION__);
+        return uiResult;
+    }
+}
+
+
+UINT
+msi_format_field(
+    _In_ MSIHANDLE hInstall,
+    _In_ MSIHANDLE hRecord,
+    _In_ unsigned int iField,
+    _Out_ LPTSTR *pszValue)
+{
+    if (pszValue == NULL)
+    {
+        return ERROR_BAD_ARGUMENTS;
+    }
+
+    /* Read string to format. */
+    LPTSTR szValue = NULL;
+    UINT uiResult = msi_get_record_string(hRecord, iField, &szValue);
+    if (uiResult != ERROR_SUCCESS)
+    {
+        return uiResult;
+    }
+    if (szValue[0] == 0)
+    {
+        /* The string is empty. There's nothing left to do. */
+        *pszValue = szValue;
+        return ERROR_SUCCESS;
+    }
+
+    /* Create a temporary record. */
+    MSIHANDLE hRecordEx = MsiCreateRecord(1);
+    if (!hRecordEx)
+    {
+        uiResult = ERROR_INVALID_HANDLE;
+        msg(M_NONFATAL, "%s: MsiCreateRecord failed", __FUNCTION__);
+        goto cleanup_szValue;
+    }
+
+    /* Populate the record with data. */
+    uiResult = MsiRecordSetString(hRecordEx, 0, szValue);
+    if (uiResult != ERROR_SUCCESS)
+    {
+        SetLastError(uiResult); /* MSDN does not mention MsiRecordSetString() to set GetLastError(). But we do have an error code. Set last error manually. */
+        msg(M_NONFATAL | M_ERRNO, "%s: MsiRecordSetString failed", __FUNCTION__);
+        goto cleanup_hRecordEx;
+    }
+
+    /* Do the formatting. */
+    uiResult = msi_format_record(hInstall, hRecordEx, pszValue);
+
+cleanup_hRecordEx:
+    MsiCloseHandle(hRecordEx);
+cleanup_szValue:
+    free(szValue);
+    return uiResult;
+}