text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE122_Heap_Based_Buffer_Overflow__c_CWE129_rand_44.c
  Label Definition File: CWE122_Heap_Based_Buffer_Overflow__c_CWE129.label.xml
  Template File: sources-sinks-44.tmpl.c
  */
  /*
   * @description
   * CWE: 122 Heap Based Buffer Overflow
   * BadSource: rand Set data to result of rand(), which may be zero
   * 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: 44 Data/control flow: data passed as an argument from one function to a function in the same source file called via a function pointer
   *
   * */
  
  #include "std_testcase.h"
  
  #ifndef OMITBAD
  
  static void badSink(int data)
  {
      {
          int i;
          int * buffer = (int *)malloc(10 * sizeof(int));
          if (buffer == NULL) {exit(-1);}
          /* 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);
      }
  }
  
  void CWE122_Heap_Based_Buffer_Overflow__c_CWE129_rand_44_bad()
  {
      int data;
      /* define a function pointer */
      void (*funcPtr) (int) = badSink;
      /* Initialize data */
      data = -1;
      /* POTENTIAL FLAW: Set data to a random value */
      data = RAND32();
      /* use the function pointer */
      funcPtr(data);
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodG2B() uses the GoodSource with the BadSink */
  static void goodG2BSink(int data)
  {
      {
          int i;
          int * buffer = (int *)malloc(10 * sizeof(int));
          if (buffer == NULL) {exit(-1);}
          /* 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);
      }
  }
  
  static void goodG2B()
  {
      int data;
      void (*funcPtr) (int) = goodG2BSink;
      /* 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;
      funcPtr(data);
  }
  
  /* goodB2G() uses the BadSource with the GoodSink */
  static void goodB2GSink(int data)
  {
      {
          int i;
          int * buffer = (int *)malloc(10 * sizeof(int));
          if (buffer == NULL) {exit(-1);}
          /* 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);
      }
  }
  
  static void goodB2G()
  {
      int data;
      void (*funcPtr) (int) = goodB2GSink;
      /* Initialize data */
      data = -1;
      /* POTENTIAL FLAW: Set data to a random value */
      data = RAND32();
      funcPtr(data);
  }
  
  void CWE122_Heap_Based_Buffer_Overflow__c_CWE129_rand_44_good()
  {
      goodG2B();
      goodB2G();
  }
  
  #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()...");
      CWE122_Heap_Based_Buffer_Overflow__c_CWE129_rand_44_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE122_Heap_Based_Buffer_Overflow__c_CWE129_rand_44_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  