/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE78_OS_Command_Injection__wchar_t_listen_socket_w32_execv_52a.c
Label Definition File: CWE78_OS_Command_Injection.strings.label.xml
Template File: sources-sink-52a.tmpl.c
*/
/*
 * @description
 * CWE: 78 OS Command Injection
 * BadSource: listen_socket Read data using a listen socket (server side)
 * GoodSource: Fixed string
 * Sink: w32_execv
 *    BadSink : execute command with wexecv
 * Flow Variant: 52 Data flow: data passed as an argument from one function to another to another in three different source files
 *
 * */

#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

#ifdef _WIN32
#include <winsock2.h>
#include <windows.h>
#include <direct.h>
#pragma comment(lib, "ws2_32") /* include ws2_32.lib when linking */
#define CLOSE_SOCKET closesocket
#else
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define INVALID_SOCKET -1
#define SOCKET_ERROR -1
#define CLOSE_SOCKET close
#define SOCKET int
#endif

#define TCP_PORT 27015
#define LISTEN_BACKLOG 5

#include <process.h>
#define EXECV _wexecv

#ifndef OMITBAD

/* bad function declaration */
void CWE78_OS_Command_Injection__wchar_t_listen_socket_w32_execv_52b_badSink(wchar_t * data);

void CWE78_OS_Command_Injection__wchar_t_listen_socket_w32_execv_52_bad()
{
    wchar_t * data;
    wchar_t dataBuffer[100] = COMMAND_ARG2;
    data = dataBuffer;
    {
#ifdef _WIN32
        WSADATA wsaData;
        int wsaDataInit = 0;
#endif
        int recvResult;
        struct sockaddr_in service;
        wchar_t *replace;
        SOCKET listenSocket = INVALID_SOCKET;
        SOCKET acceptSocket = INVALID_SOCKET;
        size_t dataLen = wcslen(data);
        do
        {
#ifdef _WIN32
            if (WSAStartup(MAKEWORD(2,2), &wsaData) != NO_ERROR)
            {
                break;
            }
            wsaDataInit = 1;
#endif
            /* POTENTIAL FLAW: Read data using a listen socket */
            listenSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
            if (listenSocket == INVALID_SOCKET)
            {
                break;
            }
            memset(&service, 0, sizeof(service));
            service.sin_family = AF_INET;
            service.sin_addr.s_addr = INADDR_ANY;
            service.sin_port = htons(TCP_PORT);
            if (bind(listenSocket, (struct sockaddr*)&service, sizeof(service)) == SOCKET_ERROR)
            {
                break;
            }
            if (listen(listenSocket, LISTEN_BACKLOG) == SOCKET_ERROR)
            {
                break;
            }
            acceptSocket = accept(listenSocket, NULL, NULL);
            if (acceptSocket == SOCKET_ERROR)
            {
                break;
            }
            /* Abort on error or the connection was closed */
            recvResult = recv(acceptSocket, (char *)(data + dataLen), sizeof(wchar_t) * (100 - dataLen - 1), 0);
            if (recvResult == SOCKET_ERROR || recvResult == 0)
            {
                break;
            }
            /* Append null terminator */
            data[dataLen + recvResult / sizeof(wchar_t)] = L'\0';
            /* Eliminate CRLF */
            replace = wcschr(data, L'\r');
            if (replace)
            {
                *replace = L'\0';
            }
            replace = wcschr(data, L'\n');
            if (replace)
            {
                *replace = L'\0';
            }
        }
        while (0);
        if (listenSocket != INVALID_SOCKET)
        {
            CLOSE_SOCKET(listenSocket);
        }
        if (acceptSocket != INVALID_SOCKET)
        {
            CLOSE_SOCKET(acceptSocket);
        }
#ifdef _WIN32
        if (wsaDataInit)
        {
            WSACleanup();
        }
#endif
    }
    CWE78_OS_Command_Injection__wchar_t_listen_socket_w32_execv_52b_badSink(data);
}

#endif /* OMITBAD */

#ifndef OMITGOOD

/* good function declaration */
void CWE78_OS_Command_Injection__wchar_t_listen_socket_w32_execv_52b_goodG2BSink(wchar_t * data);

/* 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_listen_socket_w32_execv_52b_goodG2BSink(data);
}

void CWE78_OS_Command_Injection__wchar_t_listen_socket_w32_execv_52_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_listen_socket_w32_execv_52_good();
    printLine("Finished good()");
#endif /* OMITGOOD */
#ifndef OMITBAD
    printLine("Calling bad()...");
    CWE78_OS_Command_Injection__wchar_t_listen_socket_w32_execv_52_bad();
    printLine("Finished bad()");
#endif /* OMITBAD */
    return 0;
}

#endif
