/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE124_Buffer_Underwrite__CWE839_rand_13.c
Label Definition File: CWE124_Buffer_Underwrite__CWE839.label.xml
Template File: sources-sinks-13.tmpl.c
*/
/*
 * @description
 * CWE: 124 Buffer Underwrite
 * BadSource: rand Set data to result of rand(), which may be zero
 * GoodSource: Non-negative but less than 10
 * Sinks:
 *    GoodSink: Ensure the array index is valid
 *    BadSink : Improperly check the array index by not checking the lower bound
 * Flow Variant: 13 Control flow: if(GLOBAL_CONST_FIVE==5) and if(GLOBAL_CONST_FIVE!=5)
 *
 * */

#include "std_testcase.h"

#ifndef OMITBAD

void CWE124_Buffer_Underwrite__CWE839_rand_13_bad()
{
    int data;
    /* Initialize data */
    data = -1;
    if(GLOBAL_CONST_FIVE==5)
    {
        /* POTENTIAL FLAW: Set data to a random value */
        data = RAND32();
    }
    if(GLOBAL_CONST_FIVE==5)
    {
        {
            int i;
            int buffer[10] = { 0 };
            /* POTENTIAL FLAW: Attempt to access a negative index of the array
            * This code does not check to see if the array index is negative */
            if (data < 10)
            {
                buffer[data] = 1;
                /* Print the array values */
                for(i = 0; i < 10; i++)
                {
                    printIntLine(buffer[i]);
                }
            }
            else
            {
                printLine("ERROR: Array index is negative.");
            }
        }
    }
}

#endif /* OMITBAD */

#ifndef OMITGOOD

/* goodB2G1() - use badsource and goodsink by changing the second GLOBAL_CONST_FIVE==5 to GLOBAL_CONST_FIVE!=5 */
static void goodB2G1()
{
    int data;
    /* Initialize data */
    data = -1;
    if(GLOBAL_CONST_FIVE==5)
    {
        /* POTENTIAL FLAW: Set data to a random value */
        data = RAND32();
    }
    if(GLOBAL_CONST_FIVE!=5)
    {
        /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
        printLine("Benign, fixed string");
    }
    else
    {
        {
            int i;
            int buffer[10] = { 0 };
            /* FIX: Properly validate the array index and prevent a buffer underwrite */
            if (data >= 0 && data < (10))
            {
                buffer[data] = 1;
                /* Print the array values */
                for(i = 0; i < 10; i++)
                {
                    printIntLine(buffer[i]);
                }
            }
            else
            {
                printLine("ERROR: Array index is out-of-bounds");
            }
        }
    }
}

/* goodB2G2() - use badsource and goodsink by reversing the blocks in the second if */
static void goodB2G2()
{
    int data;
    /* Initialize data */
    data = -1;
    if(GLOBAL_CONST_FIVE==5)
    {
        /* POTENTIAL FLAW: Set data to a random value */
        data = RAND32();
    }
    if(GLOBAL_CONST_FIVE==5)
    {
        {
            int i;
            int buffer[10] = { 0 };
            /* FIX: Properly validate the array index and prevent a buffer underwrite */
            if (data >= 0 && data < (10))
            {
                buffer[data] = 1;
                /* Print the array values */
                for(i = 0; i < 10; i++)
                {
                    printIntLine(buffer[i]);
                }
            }
            else
            {
                printLine("ERROR: Array index is out-of-bounds");
            }
        }
    }
}

/* goodG2B1() - use goodsource and badsink by changing the first GLOBAL_CONST_FIVE==5 to GLOBAL_CONST_FIVE!=5 */
static void goodG2B1()
{
    int data;
    /* Initialize data */
    data = -1;
    if(GLOBAL_CONST_FIVE!=5)
    {
        /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
        printLine("Benign, fixed string");
    }
    else
    {
        /* FIX: Use a value greater than 0, but less than 10 to avoid attempting to
        * access an index of the array in the sink that is out-of-bounds */
        data = 7;
    }
    if(GLOBAL_CONST_FIVE==5)
    {
        {
            int i;
            int buffer[10] = { 0 };
            /* POTENTIAL FLAW: Attempt to access a negative index of the array
            * This code does not check to see if the array index is negative */
            if (data < 10)
            {
                buffer[data] = 1;
                /* Print the array values */
                for(i = 0; i < 10; i++)
                {
                    printIntLine(buffer[i]);
                }
            }
            else
            {
                printLine("ERROR: Array index is negative.");
            }
        }
    }
}

/* goodG2B2() - use goodsource and badsink by reversing the blocks in the first if */
static void goodG2B2()
{
    int data;
    /* Initialize data */
    data = -1;
    if(GLOBAL_CONST_FIVE==5)
    {
        /* FIX: Use a value greater than 0, but less than 10 to avoid attempting to
        * access an index of the array in the sink that is out-of-bounds */
        data = 7;
    }
    if(GLOBAL_CONST_FIVE==5)
    {
        {
            int i;
            int buffer[10] = { 0 };
            /* POTENTIAL FLAW: Attempt to access a negative index of the array
            * This code does not check to see if the array index is negative */
            if (data < 10)
            {
                buffer[data] = 1;
                /* Print the array values */
                for(i = 0; i < 10; i++)
                {
                    printIntLine(buffer[i]);
                }
            }
            else
            {
                printLine("ERROR: Array index is negative.");
            }
        }
    }
}

void CWE124_Buffer_Underwrite__CWE839_rand_13_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()...");
    CWE124_Buffer_Underwrite__CWE839_rand_13_good();
    printLine("Finished good()");
#endif /* OMITGOOD */
#ifndef OMITBAD
    printLine("Calling bad()...");
    CWE124_Buffer_Underwrite__CWE839_rand_13_bad();
    printLine("Finished bad()");
#endif /* OMITBAD */
    return 0;
}

#endif
