text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE122_Heap_Based_Buffer_Overflow__c_dest_char_cpy_18.c
  Label Definition File: CWE122_Heap_Based_Buffer_Overflow__c_dest.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: cpy
   *    BadSink : Copy string to data using strcpy
   * Flow Variant: 18 Control flow: goto statements
   *
   * */
  
  #include "std_testcase.h"
  
  #include <wchar.h>
  
  #ifndef OMITBAD
  
  void CWE122_Heap_Based_Buffer_Overflow__c_dest_char_cpy_18_bad()
  {
      char * data;
      data = 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 = (char *)malloc(50*sizeof(char));
      data[0] = '\0'; /* null terminate */
      {
          char source[100];
          memset(source, 'C', 100-1); /* fill with 'C's */
          source[100-1] = '\0'; /* null terminate */
          /* POTENTIAL FLAW: Possible buffer overflow if source is larger than data */
          strcpy(data, source);
          printLine(data);
          free(data);
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodG2B() - use goodsource and badsink by reversing the blocks on the goto statement */
  static void goodG2B()
  {
      char * data;
      data = 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 = (char *)malloc(100*sizeof(char));
      data[0] = '\0'; /* null terminate */
      {
          char source[100];
          memset(source, 'C', 100-1); /* fill with 'C's */
          source[100-1] = '\0'; /* null terminate */
          /* POTENTIAL FLAW: Possible buffer overflow if source is larger than data */
          strcpy(data, source);
          printLine(data);
          free(data);
      }
  }
  
  void CWE122_Heap_Based_Buffer_Overflow__c_dest_char_cpy_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.
   */
  
  #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_dest_char_cpy_18_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE122_Heap_Based_Buffer_Overflow__c_dest_char_cpy_18_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  