/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE78_OS_Command_Injection__wchar_t_environment_w32spawnl_41.c
Label Definition File: CWE78_OS_Command_Injection.strings.label.xml
Template File: sources-sink-41.tmpl.c
*/
/*
 * @description
 * CWE: 78 OS Command Injection
 * BadSource: environment Read input from an environment variable
 * GoodSource: Fixed string
 * Sink: w32spawnl
 *    BadSink : execute command with wspawnl
 * Flow Variant: 41 Data flow: data passed as an argument from one function to another in the same source file
 *
 * */

#include "std_testcase.h"

#include <wchar.h>

#ifdef _WIN32
#define COMMAND_INT_PATH L"%WINDIR%\\system32\\cmd.exe"
#define COMMAND_INT L"cmd.exe"
#define COMMAND_ARG1 L"/c"
#define COMMAND_ARG2 L"dir "
#define COMMAND_ARG3 data
#else /* NOT _WIN32 */
#include <unistd.h>
#define COMMAND_INT_PATH L"/bin/sh"
#define COMMAND_INT L"sh"
#define COMMAND_ARG1 L"-c"
#define COMMAND_ARG2 L"ls "
#define COMMAND_ARG3 data
#endif

#define ENV_VARIABLE L"ADD"

#ifdef _WIN32
#define GETENV _wgetenv
#else
#define GETENV getenv
#endif

#include <process.h>

#ifndef OMITBAD

void CWE78_OS_Command_Injection__wchar_t_environment_w32spawnl_41_badSink(wchar_t * data)
{
    /* wspawnl - specify the path where the command is located */
    /* POTENTIAL FLAW: Execute command without validating input possibly leading to command injection */
    _wspawnl(_P_WAIT, COMMAND_INT_PATH, COMMAND_INT_PATH, COMMAND_ARG1, COMMAND_ARG3, NULL);
}

void CWE78_OS_Command_Injection__wchar_t_environment_w32spawnl_41_bad()
{
    wchar_t * data;
    wchar_t dataBuffer[100] = COMMAND_ARG2;
    data = dataBuffer;
    {
        /* Append input from an environment variable to data */
        size_t dataLen = wcslen(data);
        wchar_t * environment = GETENV(ENV_VARIABLE);
        /* If there is data in the environment variable */
        if (environment != NULL)
        {
            /* POTENTIAL FLAW: Read data from an environment variable */
            wcsncat(data+dataLen, environment, 100-dataLen-1);
        }
    }
    CWE78_OS_Command_Injection__wchar_t_environment_w32spawnl_41_badSink(data);
}

#endif /* OMITBAD */

#ifndef OMITGOOD

void CWE78_OS_Command_Injection__wchar_t_environment_w32spawnl_41_goodG2BSink(wchar_t * data)
{
    /* wspawnl - specify the path where the command is located */
    /* POTENTIAL FLAW: Execute command without validating input possibly leading to command injection */
    _wspawnl(_P_WAIT, COMMAND_INT_PATH, COMMAND_INT_PATH, COMMAND_ARG1, COMMAND_ARG3, NULL);
}

/* goodG2B uses the GoodSource with the BadSink */
static void goodG2B()
{
    wchar_t * data;
    wchar_t dataBuffer[100] = COMMAND_ARG2;
    data = dataBuffer;
    /* FIX: Append a fixed string to data (not user / external input) */
    wcscat(data, L"*.*");
    CWE78_OS_Command_Injection__wchar_t_environment_w32spawnl_41_goodG2BSink(data);
}

void CWE78_OS_Command_Injection__wchar_t_environment_w32spawnl_41_good()
{
    goodG2B();
}

#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()...");
    CWE78_OS_Command_Injection__wchar_t_environment_w32spawnl_41_good();
    printLine("Finished good()");
#endif /* OMITGOOD */
#ifndef OMITBAD
    printLine("Calling bad()...");
    CWE78_OS_Command_Injection__wchar_t_environment_w32spawnl_41_bad();
    printLine("Finished bad()");
#endif /* OMITBAD */
    return 0;
}

#endif
