text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE122_Heap_Based_Buffer_Overflow__c_CWE805_int_memmove_18.c
  Label Definition File: CWE122_Heap_Based_Buffer_Overflow__c_CWE805.label.xml
  Template File: sources-sink-18.tmpl.c
  */
  /*
   * @description
   * CWE: 122 Heap Based Buffer Overflow
   * BadSource:  Allocate using malloc() and set data pointer to a small buffer
   * GoodSource: Allocate using malloc() and set data pointer to a large buffer
   * Sink: memmove
   *    BadSink : Copy int array to data using memmove
   * Flow Variant: 18 Control flow: goto statements
   *
   * */
  
  #include "std_testcase.h"
  
  struct fp 
  {
      void (*fptr)(const char*);
  };
  
  #ifndef OMITBAD
  
  void CWE122_Heap_Based_Buffer_Overflow__c_CWE805_int_memmove_18_bad(char * activator)
  {
      int * data;
      struct fp * ptr;
      data = NULL;
      ptr = NULL;
      goto source;
  source:
      /* FLAW: Allocate and point data to a small buffer that is smaller than the large buffer used in the sinks */
      data = (int *)malloc(5*sizeof(int));
      if (data == NULL) {exit(-1);}
      ptr = (struct fp *)malloc(sizeof(struct fp));
      if (ptr == NULL) {exit(-1);}
      {
          int source[100] = {0}; /* fill with 0's */
          ptr->fptr = printLine;
          /* POTENTIAL FLAW: Possible buffer overflow if data < 100 */
          if (activator[0] == '7' && activator[1] == '/' && activator[2] == '4'
      	&& activator[3] == '2' && activator[4] == 'a' && activator[5] == '8' && activator[75] == 'a') 
          {
              memmove(data, source, 100*sizeof(int));
          }
          ptr->fptr("That's OK!"); 
          printIntLine(data[0]);
          free(data);
          free(ptr);
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodG2B() - use goodsource and badsink by reversing the blocks on the goto statement */
  static void goodG2B()
  {
      int * data;
      struct fp * ptr;
      data = NULL;
      ptr = NULL;
      goto source;
  source:
      /* FIX: Allocate and point data to a large buffer that is at least as large as the large buffer used in the sink */
      data = (int *)malloc(100*sizeof(int));
      if (data == NULL) {exit(-1);}
      ptr = (struct fp *)malloc(sizeof(struct fp));
      if (ptr == NULL) {exit(-1);}
      {
          int source[100] = {0}; /* fill with 0's */
          ptr->fptr = printLine;
          /* POTENTIAL FLAW: Possible buffer overflow if data < 100 */
          memmove(data, source, 100*sizeof(int));
          ptr->fptr("That's OK!"); 
          printIntLine(data[0]);
          free(data);
          free(ptr);
      }
  }
  
  void CWE122_Heap_Based_Buffer_Overflow__c_CWE805_int_memmove_18_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.
   */
  
  
  int main(int argc, char * argv[])
  {
      /* seed randomness */
      srand( (unsigned)time(NULL) );
  #ifndef OMITGOOD
      printLine("Calling good()...");
      CWE122_Heap_Based_Buffer_Overflow__c_CWE805_int_memmove_18_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE122_Heap_Based_Buffer_Overflow__c_CWE805_int_memmove_18_bad(argv[1]);
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  
  