text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE400_Resource_Exhaustion__rand_fwrite_02.c
  Label Definition File: CWE400_Resource_Exhaustion.label.xml
  Template File: sources-sinks-02.tmpl.c
  */
  /*
   * @description
   * CWE: 400 Resource Exhaustion
   * BadSource: rand Set data to result of rand(), which may be zero
   * GoodSource: Assign count to be a relatively small number
   * Sinks: fwrite
   *    GoodSink: Write to a file count number of times, but first validate count
   *    BadSink : Write to a file count number of times
   * Flow Variant: 02 Control flow: if(1) and if(0)
   *
   * */
  
  #include "std_testcase.h"
  
  #define SENTENCE "This is the sentence we are printing to the file. "
  
  #ifndef OMITBAD
  
  void CWE400_Resource_Exhaustion__rand_fwrite_02_bad()
  {
      int count;
      /* Initialize count */
      count = -1;
      if(1)
      {
          /* POTENTIAL FLAW: Set count to a random value */
          count = RAND32();
      }
      if(1)
      {
          {
              size_t i = 0;
              FILE *pFile = NULL;
              const char *filename = "output_bad.txt";
              pFile = fopen(filename, "w+");
              if (pFile == NULL)
              {
                  exit(1);
              }
              /* POTENTIAL FLAW: For loop using count as the loop variant and no validation
               * This can cause a file to become very large */
              for (i = 0; i < (size_t)count; i++)
              {
                  if (strlen(SENTENCE) != fwrite(SENTENCE, sizeof(char), strlen(SENTENCE), pFile))
                  {
                      exit(1);
                  }
              }
              if (pFile)
              {
                  fclose(pFile);
              }
          }
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodB2G1() - use badsource and goodsink by changing the second 1 to 0 */
  static void goodB2G1()
  {
      int count;
      /* Initialize count */
      count = -1;
      if(1)
      {
          /* POTENTIAL FLAW: Set count to a random value */
          count = RAND32();
      }
      if(0)
      {
          /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
          printLine("Benign, fixed string");
      }
      else
      {
          {
              size_t i = 0;
              FILE *pFile = NULL;
              const char *filename = "output_good.txt";
              /* FIX: Validate count before using it as the for loop variant to write to a file */
              if (count > 0 && count <= 20)
              {
                  pFile = fopen(filename, "w+");
                  if (pFile == NULL)
                  {
                      exit(1);
                  }
                  for (i = 0; i < (size_t)count; i++)
                  {
                      if (strlen(SENTENCE) != fwrite(SENTENCE, sizeof(char), strlen(SENTENCE), pFile)) exit(1);
                  }
                  if (pFile)
                  {
                      fclose(pFile);
                  }
              }
          }
      }
  }
  
  /* goodB2G2() - use badsource and goodsink by reversing the blocks in the second if */
  static void goodB2G2()
  {
      int count;
      /* Initialize count */
      count = -1;
      if(1)
      {
          /* POTENTIAL FLAW: Set count to a random value */
          count = RAND32();
      }
      if(1)
      {
          {
              size_t i = 0;
              FILE *pFile = NULL;
              const char *filename = "output_good.txt";
              /* FIX: Validate count before using it as the for loop variant to write to a file */
              if (count > 0 && count <= 20)
              {
                  pFile = fopen(filename, "w+");
                  if (pFile == NULL)
                  {
                      exit(1);
                  }
                  for (i = 0; i < (size_t)count; i++)
                  {
                      if (strlen(SENTENCE) != fwrite(SENTENCE, sizeof(char), strlen(SENTENCE), pFile)) exit(1);
                  }
                  if (pFile)
                  {
                      fclose(pFile);
                  }
              }
          }
      }
  }
  
  /* goodG2B1() - use goodsource and badsink by changing the first 1 to 0 */
  static void goodG2B1()
  {
      int count;
      /* Initialize count */
      count = -1;
      if(0)
      {
          /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
          printLine("Benign, fixed string");
      }
      else
      {
          /* FIX: Use a relatively small number */
          count = 20;
      }
      if(1)
      {
          {
              size_t i = 0;
              FILE *pFile = NULL;
              const char *filename = "output_bad.txt";
              pFile = fopen(filename, "w+");
              if (pFile == NULL)
              {
                  exit(1);
              }
              /* POTENTIAL FLAW: For loop using count as the loop variant and no validation
               * This can cause a file to become very large */
              for (i = 0; i < (size_t)count; i++)
              {
                  if (strlen(SENTENCE) != fwrite(SENTENCE, sizeof(char), strlen(SENTENCE), pFile))
                  {
                      exit(1);
                  }
              }
              if (pFile)
              {
                  fclose(pFile);
              }
          }
      }
  }
  
  /* goodG2B2() - use goodsource and badsink by reversing the blocks in the first if */
  static void goodG2B2()
  {
      int count;
      /* Initialize count */
      count = -1;
      if(1)
      {
          /* FIX: Use a relatively small number */
          count = 20;
      }
      if(1)
      {
          {
              size_t i = 0;
              FILE *pFile = NULL;
              const char *filename = "output_bad.txt";
              pFile = fopen(filename, "w+");
              if (pFile == NULL)
              {
                  exit(1);
              }
              /* POTENTIAL FLAW: For loop using count as the loop variant and no validation
               * This can cause a file to become very large */
              for (i = 0; i < (size_t)count; i++)
              {
                  if (strlen(SENTENCE) != fwrite(SENTENCE, sizeof(char), strlen(SENTENCE), pFile))
                  {
                      exit(1);
                  }
              }
              if (pFile)
              {
                  fclose(pFile);
              }
          }
      }
  }
  
  void CWE400_Resource_Exhaustion__rand_fwrite_02_good()
  {
      goodB2G1();
      goodB2G2();
      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()...");
      CWE400_Resource_Exhaustion__rand_fwrite_02_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE400_Resource_Exhaustion__rand_fwrite_02_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  