text: /*
   * auth_driver.c
   *
   * a driver for auth functions
   *
   * David A. McGrew
   * Cisco Systems, Inc.
   */
  
  /*
   *	
   * Copyright (c) 2001-2006, Cisco Systems, Inc.
   * All rights reserved.
   * 
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 
   *   Redistributions of source code must retain the above copyright
   *   notice, this list of conditions and the following disclaimer.
   * 
   *   Redistributions in binary form must reproduce the above
   *   copyright notice, this list of conditions and the following
   *   disclaimer in the documentation and/or other materials provided
   *   with the distribution.
   * 
   *   Neither the name of the Cisco Systems, Inc. nor the names of its
   *   contributors may be used to endorse or promote products derived
   *   from this software without specific prior written permission.
   * 
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
   * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
   * OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   */
  
  
  #include <stdio.h>    /* for printf() */
  #include <stdlib.h>   /* for xalloc() */
  #include <unistd.h>   /* for getopt() */
  
  #include "auth.h"
  #include "null_auth.h"
  
  #define PRINT_DEBUG_DATA 0
  
  extern auth_type_t tmmhv2;
  
  const uint16_t msg0[9] = {
    0x6015, 0xf141, 0x5ba1, 0x29a0, 0xf604, 0xd1c, 0x2d9, 0xaa8a, 0x7931
  };
  
  /* key1 is for TAG_WORDS = 2 */
  
  const uint16_t key1[47] = {
    0xe627, 0x6a01, 0x5ea7, 0xf27a, 0xc536, 0x2192, 0x11be, 0xea35,
    0xdb9d, 0x63d6, 0xfa8a, 0xfc45, 0xe08b, 0xd216, 0xced2, 0x7853,
    0x1a82, 0x22f5, 0x90fb, 0x1c29, 0x708e, 0xd06f, 0x82c3, 0xbee6,
    0x4f21, 0x6f33, 0x65c0, 0xd211, 0xc25e, 0x9138, 0x4fa3, 0x7c1f,
    0x61ac, 0x3489, 0x2976, 0x8c19, 0x8252, 0xddbf, 0xcad3, 0xc28f,
    0x68d6, 0x58dd, 0x504f, 0x2bbf, 0x0278, 0x70b7, 0xcfca
  };
  
  double
  auth_bits_per_second(auth_t *h, int msg_len);
  
  
  void
  usage(char *prog_name) {
    printf("usage: %s [ -t | -v ]\n", prog_name);
    exit(255);
  }
  
  #define MAX_MSG_LEN 2048
  
  int
  main (int argc, char *argv[]) {
    auth_t *a = NULL;
    err_status_t status;
    int i;
    int c;
    unsigned do_timing_test = 0;
    unsigned do_validation = 0;
  
    /* process input arguments */
    while (1) {
      c = getopt(argc, argv, "tv");
      if (c == -1) 
        break;
      switch (c) {
      case 't':
        do_timing_test = 1;
        break;
      case 'v':
        do_validation = 1;
        break;
      default:
        usage(argv[0]);
      }    
    }
    
    printf("auth driver\nDavid A. McGrew\nCisco Systems, Inc.\n");
  
    if (!do_validation && !do_timing_test)
      usage(argv[0]);
  
    if (do_validation) {
      printf("running self-test for %s...", tmmhv2.description);
      status = tmmhv2_add_big_test();
      if (status) {
        printf("tmmhv2_add_big_test failed with error code %d\n", status);
        exit(status);
      }  
      status = auth_type_self_test(&tmmhv2);
      if (status) {
        printf("failed with error code %d\n", status);
        exit(status);
      }
      printf("passed\n");
    }
  
    if (do_timing_test) {
  
      /* tmmhv2 timing test */
      status = auth_type_alloc(&tmmhv2, &a, 94, 4);
      if (status) {
        fprintf(stderr, "can't allocate tmmhv2\n");
        exit(status);
      }
      status = auth_init(a, (uint8_t *)key1);
      if (status) {
        printf("error initializaing auth function\n");
        exit(status);
      }
      
      printf("timing %s (tag length %d)\n", 
  	   tmmhv2.description, auth_get_tag_length(a));
      for (i=8; i <= MAX_MSG_LEN; i *= 2)
        printf("msg len: %d\tgigabits per second: %f\n",
  	     i, auth_bits_per_second(a, i) / 1E9);
  
      status = auth_dealloc(a);
      if (status) {
        printf("error deallocating auth function\n");
        exit(status);
      }
      
    }
  
    return 0;
  }
  
  #define NUM_TRIALS 100000
  
  #include <time.h>
  
  double
  auth_bits_per_second(auth_t *a, int msg_len_octets) {
    int i;
    clock_t timer;
    uint8_t *result;
    int msg_len = (msg_len_octets + 1)/2;
    uint16_t *msg_string; 
  
    /* create random message */
    msg_string = (uint16_t *) crypto_alloc(msg_len_octets);
    if (msg_string == NULL)
      return 0.0; /* indicate failure */  
    for (i=0; i < msg_len; i++) 
      msg_string[i] = (uint16_t) random();
  
    /* allocate temporary storage for authentication tag */
    result = crypto_alloc(auth_get_tag_length(a));
    if (result == NULL) {
      free(msg_string);
      return 0.0; /* indicate failure */  
    }
    
    timer = clock();
    for (i=0; i < NUM_TRIALS; i++) {
      auth_compute(a, (uint8_t *)msg_string, msg_len_octets, (uint8_t *)result);
    }
    timer = clock() - timer;
  
    free(msg_string);
    free(result);
    
    return (double) NUM_TRIALS * 8 * msg_len_octets * CLOCKS_PER_SEC / timer;
  }
  
  
  