text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE121_Stack_Based_Buffer_Overflow__dest_char_alloca_loop_17.c
  Label Definition File: CWE121_Stack_Based_Buffer_Overflow__dest.string.label.xml
  Template File: sources-sink-17.tmpl.c
  */
  /*
   * @description
   * CWE: 121 Stack Based Buffer Overflow
   * BadSource:  Set data pointer to the bad buffer
   * GoodSource: Set data pointer to the good buffer
   * Sink: loop
   *    BadSink : Copy string to data using a loop
   * Flow Variant: 17 Control flow: for loops
   *
   * */
  
  #include "std_testcase.h"
  
  #include <wchar.h>
  
  #ifndef OMITBAD
  
  void CWE121_Stack_Based_Buffer_Overflow__dest_char_alloca_loop_17_bad()
  {
      int h,i;
      char * data;
      char * data_badbuf = (char *)ALLOCA(50*sizeof(char));
      char * data_goodbuf = (char *)ALLOCA(100*sizeof(char));
      for(h = 0; h < 0; h++)
      {
          /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
          /* FIX: Set a pointer to a "large" buffer, thus avoiding buffer overflows in the sinks. */
          data = data_goodbuf;
          data[0] = '\0'; /* null terminate */
      }
      for(i = 0; i < 1; i++)
      {
          /* FLAW: Set a pointer to a "small" buffer. This buffer will be used in the sinks as a destination
           * buffer in various memory copying functions using a "large" source buffer. */
          data = data_badbuf;
          data[0] = '\0'; /* null terminate */
      }
      {
          size_t i;
          char src[100];
          memset(src, 'C', 100-1); /* fill with 'C's */
          src[100-1] = '\0'; /* null terminate */
          /* POTENTIAL FLAW: Possible buffer overflow if the size of data is less than the length of src */
          for (i = 0; i < 100; i++)
          {
              data[i] = src[i];
          }
          data[100-1] = '\0'; /* Ensure the destination buffer is null terminated */
          printLine(data);
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodG2B() - use goodsource and badsink by changing the conditions on the for statements */
  static void goodG2B()
  {
      int h,i;
      char * data;
      char * data_badbuf = (char *)ALLOCA(50*sizeof(char));
      char * data_goodbuf = (char *)ALLOCA(100*sizeof(char));
      for(h = 0; h < 1; h++)
      {
          /* FIX: Set a pointer to a "large" buffer, thus avoiding buffer overflows in the sinks. */
          data = data_goodbuf;
          data[0] = '\0'; /* null terminate */
      }
      for(i = 0; i < 0; i++)
      {
          /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
          /* FLAW: Set a pointer to a "small" buffer. This buffer will be used in the sinks as a destination
           * buffer in various memory copying functions using a "large" source buffer. */
          data = data_badbuf;
          data[0] = '\0'; /* null terminate */
      }
      {
          size_t i;
          char src[100];
          memset(src, 'C', 100-1); /* fill with 'C's */
          src[100-1] = '\0'; /* null terminate */
          /* POTENTIAL FLAW: Possible buffer overflow if the size of data is less than the length of src */
          for (i = 0; i < 100; i++)
          {
              data[i] = src[i];
          }
          data[100-1] = '\0'; /* Ensure the destination buffer is null terminated */
          printLine(data);
      }
  }
  
  void CWE121_Stack_Based_Buffer_Overflow__dest_char_alloca_loop_17_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()...");
      CWE121_Stack_Based_Buffer_Overflow__dest_char_alloca_loop_17_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE121_Stack_Based_Buffer_Overflow__dest_char_alloca_loop_17_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  