summaryrefslogtreecommitdiffstats
path: root/netwerk/srtp/src/crypto/test/cipher_driver.c
blob: ea41ff5a4c943b450b39402e4dfd87a33f506bc2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
/*
 * cipher_driver.c
 *
 * A driver for the generic cipher type
 *
 * 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 rand() */
#include <string.h>          /* for memset() */
#include <unistd.h>          /* for getopt() */
#include "cipher.h"
#include "aes_icm.h"
#include "null_cipher.h"

#define PRINT_DEBUG 0

void
cipher_driver_test_throughput(cipher_t *c);

err_status_t
cipher_driver_self_test(cipher_type_t *ct);


/*
 * cipher_driver_test_buffering(ct) tests the cipher's output
 * buffering for correctness by checking the consistency of succesive
 * calls
 */

err_status_t
cipher_driver_test_buffering(cipher_t *c);


/*
 * functions for testing cipher cache thrash
 */
err_status_t
cipher_driver_test_array_throughput(cipher_type_t *ct, 
				    int klen, int num_cipher);

void
cipher_array_test_throughput(cipher_t *ca[], int num_cipher);

uint64_t
cipher_array_bits_per_second(cipher_t *cipher_array[], int num_cipher, 
			     unsigned octets_in_buffer, int num_trials);

err_status_t
cipher_array_delete(cipher_t *cipher_array[], int num_cipher);

err_status_t
cipher_array_alloc_init(cipher_t ***cipher_array, int num_ciphers,
			cipher_type_t *ctype, int klen);

void
usage(char *prog_name) {
  printf("usage: %s [ -t | -v | -a ]\n", prog_name);
  exit(255);
}

void
check_status(err_status_t s) {
  if (s) {
    printf("error (code %d)\n", s);
    exit(s);
  }
  return;
}

/*
 * null_cipher, aes_icm, and aes_cbc are the cipher meta-objects
 * defined in the files in crypto/cipher subdirectory.  these are
 * declared external so that we can use these cipher types here
 */

extern cipher_type_t null_cipher;
extern cipher_type_t aes_icm;
extern cipher_type_t aes_cbc;

int
main(int argc, char *argv[]) {
  cipher_t *c = NULL;
  err_status_t status;
  unsigned char test_key[48] = {
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
    0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
    0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
  };
  int q;
  unsigned do_timing_test = 0;
  unsigned do_validation = 0;
  unsigned do_array_timing_test = 0;

  /* process input arguments */
  while (1) {
    q = getopt(argc, argv, "tva");
    if (q == -1) 
      break;
    switch (q) {
    case 't':
      do_timing_test = 1;
      break;
    case 'v':
      do_validation = 1;
      break;
    case 'a':
      do_array_timing_test = 1;
      break;
    default:
      usage(argv[0]);
    }    
  }
   
  printf("cipher test driver\n"
	 "David A. McGrew\n"
	 "Cisco Systems, Inc.\n");

  if (!do_validation && !do_timing_test && !do_array_timing_test)
    usage(argv[0]);

   /* arry timing (cache thrash) test */
  if (do_array_timing_test) {
    int max_num_cipher = 1 << 16;   /* number of ciphers in cipher_array */
    int num_cipher;
    
    for (num_cipher=1; num_cipher < max_num_cipher; num_cipher *=8)
      cipher_driver_test_array_throughput(&null_cipher, 0, num_cipher); 

    for (num_cipher=1; num_cipher < max_num_cipher; num_cipher *=8)
      cipher_driver_test_array_throughput(&aes_icm, 30, num_cipher); 

    for (num_cipher=1; num_cipher < max_num_cipher; num_cipher *=8)
      cipher_driver_test_array_throughput(&aes_icm, 46, num_cipher); 

    for (num_cipher=1; num_cipher < max_num_cipher; num_cipher *=8)
      cipher_driver_test_array_throughput(&aes_cbc, 16, num_cipher); 
 
    for (num_cipher=1; num_cipher < max_num_cipher; num_cipher *=8)
      cipher_driver_test_array_throughput(&aes_cbc, 32, num_cipher); 
  }

  if (do_validation) {
    cipher_driver_self_test(&null_cipher);
    cipher_driver_self_test(&aes_icm);
    cipher_driver_self_test(&aes_cbc);
  }

  /* do timing and/or buffer_test on null_cipher */
  status = cipher_type_alloc(&null_cipher, &c, 0); 
  check_status(status);

  status = cipher_init(c, NULL, direction_encrypt);
  check_status(status);

  if (do_timing_test) 
    cipher_driver_test_throughput(c);
  if (do_validation) {
    status = cipher_driver_test_buffering(c);
    check_status(status);
  }
  status = cipher_dealloc(c);
  check_status(status);
  

  /* run the throughput test on the aes_icm cipher (128-bit key) */
    status = cipher_type_alloc(&aes_icm, &c, 30);  
    if (status) {
      fprintf(stderr, "error: can't allocate cipher\n");
      exit(status);
    }

    status = cipher_init(c, test_key, direction_encrypt);
    check_status(status);

    if (do_timing_test)
      cipher_driver_test_throughput(c);
    
    if (do_validation) {
      status = cipher_driver_test_buffering(c);
      check_status(status);
    }
    
    status = cipher_dealloc(c);
    check_status(status);

  /* repeat the tests with 256-bit keys */
    status = cipher_type_alloc(&aes_icm, &c, 46);  
    if (status) {
      fprintf(stderr, "error: can't allocate cipher\n");
      exit(status);
    }

    status = cipher_init(c, test_key, direction_encrypt);
    check_status(status);

    if (do_timing_test)
      cipher_driver_test_throughput(c);
    
    if (do_validation) {
      status = cipher_driver_test_buffering(c);
      check_status(status);
    }
    
    status = cipher_dealloc(c);
    check_status(status);
  
  return 0;
}

void
cipher_driver_test_throughput(cipher_t *c) {
  int i;
  int min_enc_len = 32;     
  int max_enc_len = 2048;   /* should be a power of two */
  int num_trials = 1000000;  
  
  printf("timing %s throughput, key length %d:\n", c->type->description, c->key_len);
  fflush(stdout);
  for (i=min_enc_len; i <= max_enc_len; i = i * 2)
    printf("msg len: %d\tgigabits per second: %f\n",
	   i, cipher_bits_per_second(c, i, num_trials) / 1e9);

}

err_status_t
cipher_driver_self_test(cipher_type_t *ct) {
  err_status_t status;
  
  printf("running cipher self-test for %s...", ct->description);
  status = cipher_type_self_test(ct);
  if (status) {
    printf("failed with error code %d\n", status);
    exit(status);
  }
  printf("passed\n");
  
  return err_status_ok;
}

/*
 * cipher_driver_test_buffering(ct) tests the cipher's output
 * buffering for correctness by checking the consistency of succesive
 * calls
 */

err_status_t
cipher_driver_test_buffering(cipher_t *c) {
  int i, j, num_trials = 1000;
  unsigned len, buflen = 1024;
  uint8_t buffer0[buflen], buffer1[buflen], *current, *end;
  uint8_t idx[16] = { 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x12, 0x34
  };
  err_status_t status;
  
  printf("testing output buffering for cipher %s...",
	 c->type->description);

  for (i=0; i < num_trials; i++) {

   /* set buffers to zero */
    for (j=0; j < buflen; j++) 
      buffer0[j] = buffer1[j] = 0;
    
    /* initialize cipher  */
    status = cipher_set_iv(c, idx);
    if (status)
      return status;

    /* generate 'reference' value by encrypting all at once */
    status = cipher_encrypt(c, buffer0, &buflen);
    if (status)
      return status;

    /* re-initialize cipher */
    status = cipher_set_iv(c, idx);
    if (status)
      return status;
    
    /* now loop over short lengths until buffer1 is encrypted */
    current = buffer1;
    end = buffer1 + buflen;
    while (current < end) {

      /* choose a short length */
      len = rand() & 0x01f;

      /* make sure that len doesn't cause us to overreach the buffer */
      if (current + len > end)
	len = end - current;

      status = cipher_encrypt(c, current, &len);
      if (status) 
	return status;
      
      /* advance pointer into buffer1 to reflect encryption */
      current += len;
      
      /* if buffer1 is all encrypted, break out of loop */
      if (current == end)
	break;
    }

    /* compare buffers */
    for (j=0; j < buflen; j++)
      if (buffer0[j] != buffer1[j]) {
#if PRINT_DEBUG
	printf("test case %d failed at byte %d\n", i, j);
	printf("computed: %s\n", octet_string_hex_string(buffer1, buflen));
	printf("expected: %s\n", octet_string_hex_string(buffer0, buflen));
#endif 
	return err_status_algo_fail;
      }
  }
  
  printf("passed\n");

  return err_status_ok;
}


/*
 * The function cipher_test_throughput_array() tests the effect of CPU
 * cache thrash on cipher throughput.  
 *
 * cipher_array_alloc_init(ctype, array, num_ciphers) creates an array
 * of cipher_t of type ctype
 */

err_status_t
cipher_array_alloc_init(cipher_t ***ca, int num_ciphers,
			cipher_type_t *ctype, int klen) {
  int i, j;
  err_status_t status;
  uint8_t *key;
  cipher_t **cipher_array;
  /* pad klen allocation, to handle aes_icm reading 16 bytes for the
     14-byte salt */
  int klen_pad = ((klen + 15) >> 4) << 4;

  /* allocate array of pointers to ciphers */
  cipher_array = (cipher_t **) malloc(sizeof(cipher_t *) * num_ciphers);
  if (cipher_array == NULL)
    return err_status_alloc_fail;

  /* set ca to location of cipher_array */
  *ca = cipher_array;

  /* allocate key */
  key = crypto_alloc(klen_pad);
  if (key == NULL) {
    free(cipher_array);
    return err_status_alloc_fail;
  }
  
  /* allocate and initialize an array of ciphers */
  for (i=0; i < num_ciphers; i++) {

    /* allocate cipher */
    status = cipher_type_alloc(ctype, cipher_array, klen);
    if (status)
      return status;
    
    /* generate random key and initialize cipher */
    for (j=0; j < klen; j++)
      key[j] = (uint8_t) rand();
    for (; j < klen_pad; j++)
      key[j] = 0;
    status = cipher_init(*cipher_array, key, direction_encrypt);
    if (status)
      return status;

/*     printf("%dth cipher is at %p\n", i, *cipher_array); */
/*     printf("%dth cipher description: %s\n", i,  */
/* 	   (*cipher_array)->type->description); */
    
    /* advance cipher array pointer */
    cipher_array++;
  }

  crypto_free(key);

  return err_status_ok;
}

err_status_t
cipher_array_delete(cipher_t *cipher_array[], int num_cipher) {
  int i;
  
  for (i=0; i < num_cipher; i++) {
    cipher_dealloc(cipher_array[i]);
  }

  free(cipher_array);
  
  return err_status_ok;
}


/*
 * cipher_array_bits_per_second(c, l, t) computes (an estimate of) the
 * number of bits that a cipher implementation can encrypt in a second
 * when distinct keys are used to encrypt distinct messages
 * 
 * c is a cipher (which MUST be allocated an initialized already), l
 * is the length in octets of the test data to be encrypted, and t is
 * the number of trials
 *
 * if an error is encountered, the value 0 is returned
 */

uint64_t
cipher_array_bits_per_second(cipher_t *cipher_array[], int num_cipher, 
			      unsigned octets_in_buffer, int num_trials) {
  int i;
  v128_t nonce;
  clock_t timer;
  unsigned char *enc_buf;
  int cipher_index = rand() % num_cipher;

  /* Over-alloc, for NIST CBC padding */
  enc_buf = crypto_alloc(octets_in_buffer+17);
  if (enc_buf == NULL)
    return 0;  /* indicate bad parameters by returning null */
  memset(enc_buf, 0, octets_in_buffer);
  
  /* time repeated trials */
  v128_set_to_zero(&nonce);
  timer = clock();
  for(i=0; i < num_trials; i++, nonce.v32[3] = i) {
    /* length parameter to cipher_encrypt is in/out -- out is total, padded
     * length -- so reset it each time. */
    unsigned octets_to_encrypt = octets_in_buffer;

    /* encrypt buffer with cipher */
    cipher_set_iv(cipher_array[cipher_index], &nonce);
    cipher_encrypt(cipher_array[cipher_index], enc_buf, &octets_to_encrypt);

    /* choose a cipher at random from the array*/
    cipher_index = (*((uint32_t *)enc_buf)) % num_cipher;
  }
  timer = clock() - timer;

  free(enc_buf);

  if (timer == 0) {
    /* Too fast! */
    return 0;
  }

  return (uint64_t)CLOCKS_PER_SEC * num_trials * 8 * octets_in_buffer / timer;
}

void
cipher_array_test_throughput(cipher_t *ca[], int num_cipher) {
  int i;
  int min_enc_len = 16;     
  int max_enc_len = 2048;   /* should be a power of two */
  int num_trials = 1000000;

  printf("timing %s throughput with key length %d, array size %d:\n", 
	 (ca[0])->type->description, (ca[0])->key_len, num_cipher);
  fflush(stdout);
  for (i=min_enc_len; i <= max_enc_len; i = i * 4)
    printf("msg len: %d\tgigabits per second: %f\n", i,
	   cipher_array_bits_per_second(ca, num_cipher, i, num_trials) / 1e9);

}

err_status_t
cipher_driver_test_array_throughput(cipher_type_t *ct, 
				    int klen, int num_cipher) {
  cipher_t **ca = NULL;
  err_status_t status;

  status = cipher_array_alloc_init(&ca, num_cipher, ct, klen);
  if (status) {
    printf("error: cipher_array_alloc_init() failed with error code %d\n",
	   status);
    return status;
  }
  
  cipher_array_test_throughput(ca, num_cipher);
  
  cipher_array_delete(ca, num_cipher);    
 
  return err_status_ok;
}