text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE122_Heap_Based_Buffer_Overflow__c_CWE806_char_memcpy_04.c
  Label Definition File: CWE122_Heap_Based_Buffer_Overflow__c_CWE806.label.xml
  Template File: sources-sink-04.tmpl.c
  */
  /*
   * @description
   * CWE: 122 Heap Based Buffer Overflow
   * BadSource:  Initialize data as a large string
   * GoodSource: Initialize data as a small string
   * Sink: memcpy
   *    BadSink : Copy data to string using memcpy
   * Flow Variant: 04 Control flow: if(STATIC_CONST_TRUE) and if(STATIC_CONST_FALSE)
   *
   * */
  
  #include "std_testcase.h"
  
  #include <wchar.h>
  
  /* The two variables below are declared "const", so a tool should
   * be able to identify that reads of these will always return their
   * initialized values.
   */
  static const int STATIC_CONST_TRUE = 1; /* true */
  static const int STATIC_CONST_FALSE = 0; /* false */
  
  #ifndef OMITBAD
  
  void CWE122_Heap_Based_Buffer_Overflow__c_CWE806_char_memcpy_04_bad()
  {
      char * data;
      data = (char *)malloc(100*sizeof(char));
      if(STATIC_CONST_TRUE)
      {
          /* FLAW: Initialize data as a large buffer that is larger than the small buffer used in the sink */
          memset(data, 'A', 100-1); /* fill with 'A's */
          data[100-1] = '\0'; /* null terminate */
      }
      {
          char dest[50] = "";
          /* POTENTIAL FLAW: Possible buffer overflow if data is larger than dest */
          memcpy(dest, data, strlen(data)*sizeof(char));
          dest[50-1] = '\0'; /* Ensure the destination buffer is null terminated */
          printLine(data);
          free(data);
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodG2B1() - use goodsource and badsink by changing the STATIC_CONST_TRUE to STATIC_CONST_FALSE */
  static void goodG2B1()
  {
      char * data;
      data = (char *)malloc(100*sizeof(char));
      if(STATIC_CONST_FALSE)
      {
          /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
          printLine("Benign, fixed string");
      }
      else
      {
          /* FIX: Initialize data as a small buffer that as small or smaller than the small buffer used in the sink */
          memset(data, 'A', 50-1); /* fill with 'A's */
          data[50-1] = '\0'; /* null terminate */
      }
      {
          char dest[50] = "";
          /* POTENTIAL FLAW: Possible buffer overflow if data is larger than dest */
          memcpy(dest, data, strlen(data)*sizeof(char));
          dest[50-1] = '\0'; /* Ensure the destination buffer is null terminated */
          printLine(data);
          free(data);
      }
  }
  
  /* goodG2B2() - use goodsource and badsink by reversing the blocks in the if statement */
  static void goodG2B2()
  {
      char * data;
      data = (char *)malloc(100*sizeof(char));
      if(STATIC_CONST_TRUE)
      {
          /* FIX: Initialize data as a small buffer that as small or smaller than the small buffer used in the sink */
          memset(data, 'A', 50-1); /* fill with 'A's */
          data[50-1] = '\0'; /* null terminate */
      }
      {
          char dest[50] = "";
          /* POTENTIAL FLAW: Possible buffer overflow if data is larger than dest */
          memcpy(dest, data, strlen(data)*sizeof(char));
          dest[50-1] = '\0'; /* Ensure the destination buffer is null terminated */
          printLine(data);
          free(data);
      }
  }
  
  void CWE122_Heap_Based_Buffer_Overflow__c_CWE806_char_memcpy_04_good()
  {
      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()...");
      CWE122_Heap_Based_Buffer_Overflow__c_CWE806_char_memcpy_04_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE122_Heap_Based_Buffer_Overflow__c_CWE806_char_memcpy_04_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  