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 /*

  * 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;

 }