/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE134_Uncontrolled_Format_String__wchar_t_connect_socket_snprintf_05.c
Label Definition File: CWE134_Uncontrolled_Format_String.label.xml
Template File: sources-sinks-05.tmpl.c
*/
/*
 * @description
 * CWE: 134 Uncontrolled Format String
 * BadSource: connect_socket Read data using a connect socket (client side)
 * GoodSource: Copy a fixed string into data
 * Sinks: snprintf
 *    GoodSink: snwprintf with "%s" as the third argument and data as the fourth
 *    BadSink : snwprintf with data as the third argument
 * Flow Variant: 05 Control flow: if(staticTrue) and if(staticFalse)
 *
 * */

#include "std_testcase.h"

#ifndef _WIN32
#include <wchar.h>
#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 /* NOT _WIN32 */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#define INVALID_SOCKET -1
#define SOCKET_ERROR -1
#define CLOSE_SOCKET close
#define SOCKET int
#endif

#define TCP_PORT 27015
#define IP_ADDRESS "127.0.0.1"

#ifdef _WIN32
#define SNPRINTF _snwprintf
#else
#define SNPRINTF snprintf
#endif

/* The two variables below are not defined as "const", but are never
   assigned any other value, so a tool should be able to identify that
   reads of these will always return their initialized values. */
static int staticTrue = 1; /* true */
static int staticFalse = 0; /* false */

#ifndef OMITBAD

void CWE134_Uncontrolled_Format_String__wchar_t_connect_socket_snprintf_05_bad()
{
    wchar_t * data;
    wchar_t dataBuffer[100] = L"";
    data = dataBuffer;
    if(staticTrue)
    {
        {
#ifdef _WIN32
            WSADATA wsaData;
            int wsaDataInit = 0;
#endif
            int recvResult;
            struct sockaddr_in service;
            wchar_t *replace;
            SOCKET connectSocket = 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 connect socket */
                connectSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
                if (connectSocket == INVALID_SOCKET)
                {
                    break;
                }
                memset(&service, 0, sizeof(service));
                service.sin_family = AF_INET;
                service.sin_addr.s_addr = inet_addr(IP_ADDRESS);
                service.sin_port = htons(TCP_PORT);
                if (connect(connectSocket, (struct sockaddr*)&service, sizeof(service)) == SOCKET_ERROR)
                {
                    break;
                }
                /* Abort on error or the connection was closed, make sure to recv one
                 * less char than is in the recv_buf in order to append a terminator */
                /* Abort on error or the connection was closed */
                recvResult = recv(connectSocket, (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 (connectSocket != INVALID_SOCKET)
            {
                CLOSE_SOCKET(connectSocket);
            }
#ifdef _WIN32
            if (wsaDataInit)
            {
                WSACleanup();
            }
#endif
        }
    }
    if(staticTrue)
    {
        {
            wchar_t dest[100] = L"";
            /* POTENTIAL FLAW: Do not specify the format allowing a possible format string vulnerability */
            SNPRINTF(dest, 100-1, data);
            printWLine(dest);
        }
    }
}

#endif /* OMITBAD */

#ifndef OMITGOOD

/* goodB2G1() - use badsource and goodsink by changing the second staticTrue to staticFalse */
static void goodB2G1()
{
    wchar_t * data;
    wchar_t dataBuffer[100] = L"";
    data = dataBuffer;
    if(staticTrue)
    {
        {
#ifdef _WIN32
            WSADATA wsaData;
            int wsaDataInit = 0;
#endif
            int recvResult;
            struct sockaddr_in service;
            wchar_t *replace;
            SOCKET connectSocket = 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 connect socket */
                connectSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
                if (connectSocket == INVALID_SOCKET)
                {
                    break;
                }
                memset(&service, 0, sizeof(service));
                service.sin_family = AF_INET;
                service.sin_addr.s_addr = inet_addr(IP_ADDRESS);
                service.sin_port = htons(TCP_PORT);
                if (connect(connectSocket, (struct sockaddr*)&service, sizeof(service)) == SOCKET_ERROR)
                {
                    break;
                }
                /* Abort on error or the connection was closed, make sure to recv one
                 * less char than is in the recv_buf in order to append a terminator */
                /* Abort on error or the connection was closed */
                recvResult = recv(connectSocket, (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 (connectSocket != INVALID_SOCKET)
            {
                CLOSE_SOCKET(connectSocket);
            }
#ifdef _WIN32
            if (wsaDataInit)
            {
                WSACleanup();
            }
#endif
        }
    }
    if(staticFalse)
    {
        /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
        printLine("Benign, fixed string");
    }
    else
    {
        {
            wchar_t dest[100] = L"";
            /* FIX: Specify the format disallowing a format string vulnerability */
            SNPRINTF(dest, 100-1, L"%s", data);
            printWLine(dest);
        }
    }
}

/* goodB2G2() - use badsource and goodsink by reversing the blocks in the second if */
static void goodB2G2()
{
    wchar_t * data;
    wchar_t dataBuffer[100] = L"";
    data = dataBuffer;
    if(staticTrue)
    {
        {
#ifdef _WIN32
            WSADATA wsaData;
            int wsaDataInit = 0;
#endif
            int recvResult;
            struct sockaddr_in service;
            wchar_t *replace;
            SOCKET connectSocket = 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 connect socket */
                connectSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
                if (connectSocket == INVALID_SOCKET)
                {
                    break;
                }
                memset(&service, 0, sizeof(service));
                service.sin_family = AF_INET;
                service.sin_addr.s_addr = inet_addr(IP_ADDRESS);
                service.sin_port = htons(TCP_PORT);
                if (connect(connectSocket, (struct sockaddr*)&service, sizeof(service)) == SOCKET_ERROR)
                {
                    break;
                }
                /* Abort on error or the connection was closed, make sure to recv one
                 * less char than is in the recv_buf in order to append a terminator */
                /* Abort on error or the connection was closed */
                recvResult = recv(connectSocket, (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 (connectSocket != INVALID_SOCKET)
            {
                CLOSE_SOCKET(connectSocket);
            }
#ifdef _WIN32
            if (wsaDataInit)
            {
                WSACleanup();
            }
#endif
        }
    }
    if(staticTrue)
    {
        {
            wchar_t dest[100] = L"";
            /* FIX: Specify the format disallowing a format string vulnerability */
            SNPRINTF(dest, 100-1, L"%s", data);
            printWLine(dest);
        }
    }
}

/* goodG2B1() - use goodsource and badsink by changing the first staticTrue to staticFalse */
static void goodG2B1()
{
    wchar_t * data;
    wchar_t dataBuffer[100] = L"";
    data = dataBuffer;
    if(staticFalse)
    {
        /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
        printLine("Benign, fixed string");
    }
    else
    {
        /* FIX: Use a fixed string that does not contain a format specifier */
        wcscpy(data, L"fixedstringtest");
    }
    if(staticTrue)
    {
        {
            wchar_t dest[100] = L"";
            /* POTENTIAL FLAW: Do not specify the format allowing a possible format string vulnerability */
            SNPRINTF(dest, 100-1, data);
            printWLine(dest);
        }
    }
}

/* goodG2B2() - use goodsource and badsink by reversing the blocks in the first if */
static void goodG2B2()
{
    wchar_t * data;
    wchar_t dataBuffer[100] = L"";
    data = dataBuffer;
    if(staticTrue)
    {
        /* FIX: Use a fixed string that does not contain a format specifier */
        wcscpy(data, L"fixedstringtest");
    }
    if(staticTrue)
    {
        {
            wchar_t dest[100] = L"";
            /* POTENTIAL FLAW: Do not specify the format allowing a possible format string vulnerability */
            SNPRINTF(dest, 100-1, data);
            printWLine(dest);
        }
    }
}

void CWE134_Uncontrolled_Format_String__wchar_t_connect_socket_snprintf_05_good()
{
    goodB2G1();
    goodB2G2();
    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()...");
    CWE134_Uncontrolled_Format_String__wchar_t_connect_socket_snprintf_05_good();
    printLine("Finished good()");
#endif /* OMITGOOD */
#ifndef OMITBAD
    printLine("Calling bad()...");
    CWE134_Uncontrolled_Format_String__wchar_t_connect_socket_snprintf_05_bad();
    printLine("Finished bad()");
#endif /* OMITBAD */
    return 0;
}

#endif
