/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE114_Process_Control__w32_wchar_t_relativePath_02.c
Label Definition File: CWE114_Process_Control__w32.label.xml
Template File: sources-sink-02.tmpl.c
*/
/*
 * @description
 * CWE: 114 Process Control
 * BadSource: relativePath Hard code the relative pathname to the library
 * GoodSource: Hard code the full pathname to the library
 * Sink:
 *    BadSink : Load a dynamic link library
 * Flow Variant: 02 Control flow: if(1) and if(0)
 *
 * */

#include "std_testcase.h"

#include <wchar.h>

#include <windows.h>

#ifndef OMITBAD

void CWE114_Process_Control__w32_wchar_t_relativePath_02_bad()
{
    wchar_t * data;
    wchar_t dataBuffer[100] = L"";
    data = dataBuffer;
    if(1)
    {
        /* FLAW: Specify just the file name for the library, not the full path */
        wcscpy(data, L"winsrv.dll");
    }
    {
        HMODULE hModule;
        /* POTENTIAL FLAW: If the path to the library is not specified, an attacker may be able to
         * replace his own file with the intended library */
        hModule = LoadLibraryW(data);
        if (hModule != NULL)
        {
            FreeLibrary(hModule);
            printLine("Library loaded and freed successfully");
        }
        else
        {
            printLine("Unable to load library");
        }
    }
}

#endif /* OMITBAD */

#ifndef OMITGOOD

/* goodG2B1() - use goodsource and badsink by changing the 1 to 0 */
static void goodG2B1()
{
    wchar_t * data;
    wchar_t dataBuffer[100] = L"";
    data = dataBuffer;
    if(0)
    {
        /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
        printLine("Benign, fixed string");
    }
    else
    {
        /* FIX: Specify the full pathname for the library */
        wcscpy(data, L"C:\\Windows\\System32\\winsrv.dll");
    }
    {
        HMODULE hModule;
        /* POTENTIAL FLAW: If the path to the library is not specified, an attacker may be able to
         * replace his own file with the intended library */
        hModule = LoadLibraryW(data);
        if (hModule != NULL)
        {
            FreeLibrary(hModule);
            printLine("Library loaded and freed successfully");
        }
        else
        {
            printLine("Unable to load library");
        }
    }
}

/* goodG2B2() - use goodsource and badsink by reversing the blocks in the if statement */
static void goodG2B2()
{
    wchar_t * data;
    wchar_t dataBuffer[100] = L"";
    data = dataBuffer;
    if(1)
    {
        /* FIX: Specify the full pathname for the library */
        wcscpy(data, L"C:\\Windows\\System32\\winsrv.dll");
    }
    {
        HMODULE hModule;
        /* POTENTIAL FLAW: If the path to the library is not specified, an attacker may be able to
         * replace his own file with the intended library */
        hModule = LoadLibraryW(data);
        if (hModule != NULL)
        {
            FreeLibrary(hModule);
            printLine("Library loaded and freed successfully");
        }
        else
        {
            printLine("Unable to load library");
        }
    }
}

void CWE114_Process_Control__w32_wchar_t_relativePath_02_good()
{
    goodG2B1();
    goodG2B2();
}

#endif /* OMITGOOD */

/* Below is the main(). It is only used when building this testcase on
 * its own for testing or for building a binary to use in testing binary
 * analysis tools. It is not used when compiling all the testcases as one
 * application, which is how source code analysis tools are tested.
 */

#ifdef INCLUDEMAIN

int main(int argc, char * argv[])
{
    /* seed randomness */
    srand( (unsigned)time(NULL) );
#ifndef OMITGOOD
    printLine("Calling good()...");
    CWE114_Process_Control__w32_wchar_t_relativePath_02_good();
    printLine("Finished good()");
#endif /* OMITGOOD */
#ifndef OMITBAD
    printLine("Calling bad()...");
    CWE114_Process_Control__w32_wchar_t_relativePath_02_bad();
    printLine("Finished bad()");
#endif /* OMITBAD */
    return 0;
}

#endif
