text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE122_Heap_Based_Buffer_Overflow__c_CWE129_fgets_33.cpp
  Label Definition File: CWE122_Heap_Based_Buffer_Overflow__c_CWE129.label.xml
  Template File: sources-sinks-33.tmpl.cpp
  */
  /*
   * @description
   * CWE: 122 Heap Based Buffer Overflow
   * BadSource: fgets Read data from the console using fgets()
   * GoodSource: Larger than zero but less than 10
   * Sinks:
   *    GoodSink: Ensure the array index is valid
   *    BadSink : Improperly check the array index by not checking the upper bound
   * Flow Variant: 33 Data flow: use of a C++ reference to data within the same function
   *
   * */
  
  #include "std_testcase.h"
  
  #define CHAR_ARRAY_SIZE (3 * sizeof(data) + 2)
  
  namespace CWE122_Heap_Based_Buffer_Overflow__c_CWE129_fgets_33
  {
  
  #ifndef OMITBAD
  
  void bad()
  {
      int data;
      int &dataRef = data;
      /* Initialize data */
      data = -1;
      {
          char inputBuffer[CHAR_ARRAY_SIZE] = "";
          /* POTENTIAL FLAW: Read data from the console using fgets() */
          if (fgets(inputBuffer, CHAR_ARRAY_SIZE, stdin) != NULL)
          {
              /* Convert to int */
              data = atoi(inputBuffer);
          }
          else
          {
              printLine("fgets() failed.");
          }
      }
      {
          int data = dataRef;
          {
              int i;
              int * buffer = (int *)malloc(10 * sizeof(int));
              /* initialize buffer */
              for (i = 0; i < 10; i++)
              {
                  buffer[i] = 0;
              }
              /* POTENTIAL FLAW: Attempt to write to an index of the array that is above the upper bound
               * This code does check to see if the array index is negative */
              if (data >= 0)
              {
                  buffer[data] = 1;
                  /* Print the array values */
                  for(i = 0; i < 10; i++)
                  {
                      printIntLine(buffer[i]);
                  }
              }
              else
              {
                  printLine("ERROR: Array index is negative.");
              }
              free(buffer);
          }
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodG2B() uses the GoodSource with the BadSink */
  static void goodG2B()
  {
      int data;
      int &dataRef = data;
      /* Initialize data */
      data = -1;
      /* 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;
      {
          int data = dataRef;
          {
              int i;
              int * buffer = (int *)malloc(10 * sizeof(int));
              /* initialize buffer */
              for (i = 0; i < 10; i++)
              {
                  buffer[i] = 0;
              }
              /* POTENTIAL FLAW: Attempt to write to an index of the array that is above the upper bound
               * This code does check to see if the array index is negative */
              if (data >= 0)
              {
                  buffer[data] = 1;
                  /* Print the array values */
                  for(i = 0; i < 10; i++)
                  {
                      printIntLine(buffer[i]);
                  }
              }
              else
              {
                  printLine("ERROR: Array index is negative.");
              }
              free(buffer);
          }
      }
  }
  
  /* goodB2G() uses the BadSource with the GoodSink */
  static void goodB2G()
  {
      int data;
      int &dataRef = data;
      /* Initialize data */
      data = -1;
      {
          char inputBuffer[CHAR_ARRAY_SIZE] = "";
          /* POTENTIAL FLAW: Read data from the console using fgets() */
          if (fgets(inputBuffer, CHAR_ARRAY_SIZE, stdin) != NULL)
          {
              /* Convert to int */
              data = atoi(inputBuffer);
          }
          else
          {
              printLine("fgets() failed.");
          }
      }
      {
          int data = dataRef;
          {
              int i;
              int * buffer = (int *)malloc(10 * sizeof(int));
              /* initialize buffer */
              for (i = 0; i < 10; i++)
              {
                  buffer[i] = 0;
              }
              /* FIX: Properly validate the array index and prevent a buffer overflow */
              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");
              }
              free(buffer);
          }
      }
  }
  
  void good()
  {
      goodG2B();
      goodB2G();
  }
  
  #endif /* OMITGOOD */
  
  } /* close namespace */
  
  /* 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
  
  using namespace CWE122_Heap_Based_Buffer_Overflow__c_CWE129_fgets_33; /* so that we can use good and bad easily */
  
  int main(int argc, char * argv[])
  {
      /* seed randomness */
      srand( (unsigned)time(NULL) );
  #ifndef OMITGOOD
      printLine("Calling good()...");
      good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  