text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE187_Partial_Comparison__char_Environment_ncmp_user_pw_31.c
  Label Definition File: CWE187_Partial_Comparison.label.xml
  Template File: sources-sinks-31.tmpl.c
  */
  /*
   * @description
   * CWE: 187 Partial Comparison
   * BadSource: Environment Read input from an environment variable
   * GoodSource: Provide a matching password
   * Sinks: ncmp_user_pw
   *    GoodSink: Compare the 2 passwords correctly
   *    BadSink : use strncmp() to do password match, but use the length of the user password
   * Flow Variant: 31 Data flow using a copy of data within the same function
   *
   * */
  
  #include "std_testcase.h"
  
  #include <wchar.h>
  
  #define PASSWORD "Password1234"
  /* PASSWORD_SZ must equal the length of PASSWORD */
  #define PASSWORD_SZ strlen(PASSWORD)
  
  #define ENV_VARIABLE "ADD"
  
  #ifdef _WIN32
  # define GETENV getenv
  #else
  # define GETENV getenv
  #endif
  
  #ifndef OMITBAD
  
  void CWE187_Partial_Comparison__char_Environment_ncmp_user_pw_31_bad()
  {
      char * data;
      char data_buf[100] = "";
      data = data_buf;
      {
          /* Read input from an environment variable */
          size_t data_len = strlen(data);
          char * environment = GETENV(ENV_VARIABLE);
          /* If there is data in the environment variable */
          if (environment != NULL)
          {
              strncat(data+data_len, environment, 100-data_len-1);
          }
      }
      {
          char * data_copy = data;
          char * data = data_copy;
          /* By using the strlen() of the input password, you are able to create a partial comparison
           * For example if PASSWORD=PASSWORD1234, a user supplied password of PASSWORD12 will allow access */
          /* POTENTIAL FLAW: Possibly partially compare the two passwords */
          if (strncmp(PASSWORD, data, strlen(data)) == 0)
              printLine("Access granted");
          else
              printLine("Access denied!");
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodG2B() uses the GoodSource with the BadSink */
  static void goodG2B()
  {
      char * data;
      char data_buf[100] = "";
      data = data_buf;
      /* FIX: Use the matching string */
      data = PASSWORD;
      {
          char * data_copy = data;
          char * data = data_copy;
          /* By using the strlen() of the input password, you are able to create a partial comparison
           * For example if PASSWORD=PASSWORD1234, a user supplied password of PASSWORD12 will allow access */
          /* POTENTIAL FLAW: Possibly partially compare the two passwords */
          if (strncmp(PASSWORD, data, strlen(data)) == 0)
              printLine("Access granted");
          else
              printLine("Access denied!");
      }
  }
  
  /* goodB2G() uses the BadSource with the GoodSink */
  static void goodB2G()
  {
      char * data;
      char data_buf[100] = "";
      data = data_buf;
      {
          /* Read input from an environment variable */
          size_t data_len = strlen(data);
          char * environment = GETENV(ENV_VARIABLE);
          /* If there is data in the environment variable */
          if (environment != NULL)
          {
              strncat(data+data_len, environment, 100-data_len-1);
          }
      }
      {
          char * data_copy = data;
          char * data = data_copy;
          /* Ideally, we would want to do a check to see if the passwords are of equal length */
          /* FIX: Compare the two passwords completely and correctly */
          if (strcmp(PASSWORD, data) == 0)
              printLine("Access granted");
          else
              printLine("Access denied!");
      }
  }
  
  void CWE187_Partial_Comparison__char_Environment_ncmp_user_pw_31_good()
  {
      goodG2B();
      goodB2G();
  }
  
  #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()...");
      CWE187_Partial_Comparison__char_Environment_ncmp_user_pw_31_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE187_Partial_Comparison__char_Environment_ncmp_user_pw_31_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  