1
// Copyright (c) 2017-2023 Cloudflare, Inc.
2
// Licensed under the Apache 2.0 license found in the LICENSE file or at:
3
//     https://opensource.org/licenses/Apache-2.0
4
//
5
// Adapted from Node.js. Copyright Joyent, Inc. and other Node contributors.
6
//
7
// Permission is hereby granted, free of charge, to any person obtaining a
8
// copy of this software and associated documentation files (the
9
// "Software"), to deal in the Software without restriction, including
10
// without limitation the rights to use, copy, modify, merge, publish,
11
// distribute, sublicense, and/or sell copies of the Software, and to permit
12
// persons to whom the Software is furnished to do so, subject to the
13
// following conditions:
14
//
15
// The above copyright notice and this permission notice shall be included
16
// in all copies or substantial portions of the Software.
17
//
18
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
21
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
22
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24
// USE OR OTHER DEALINGS IN THE SOFTWARE.
25
26
'use strict';
27
 
28
import { Buffer } from 'node:buffer';
29
import * as assert from 'node:assert';
30
import * as crypto from 'node:crypto';
31
 
32
export const hmac_error_tests = {
33
  async test(ctrl, env, ctx) {
34
    {
35
      const Hmac = crypto.Hmac;
36
      const instance = crypto.Hmac('sha256', 'Node');
37
      assert.ok(
38
        instance instanceof Hmac,
39
        'Hmac is expected to return a new instance' +
40
          ' when called without `new`'
41
      );
42
    }
43
 
44
    assert.throws(() => crypto.createHmac(null), {
45
      code: 'ERR_INVALID_ARG_TYPE',
46
      name: 'TypeError',
47
      message: 'The "hmac" argument must be of type string. Received null',
48
    });
49
 
50
    assert.throws(
51
      () =>
52
        crypto.createHmac('sha256', 'key').digest({
53
          toString: () => {
54
            throw new Error('boom');
55
          },
56
        }),
57
      {
58
        name: 'Error',
59
        message: 'boom',
60
      }
61
    );
62
 
63
    assert.throws(() => crypto.createHmac('sha1', null), {
64
      code: 'ERR_INVALID_ARG_TYPE',
65
      name: 'TypeError',
66
    });
67
  },
68
};
69
 
70
function testHmac(algo, key, data, expected) {
71
  if (!Array.isArray(data)) data = [data];
72
 
73
  // If the key is a Buffer, test Hmac with a key object as well.
74
  const keyWrappers = [
75
    (key) => key,
76
    ...(typeof key === 'string' ? [] : [crypto.createSecretKey]),
77
  ];
78
 
79
  for (const keyWrapper of keyWrappers) {
80
    const hmac = crypto.createHmac(algo, keyWrapper(key));
81
    for (const chunk of data) hmac.update(chunk);
82
    const actual = hmac.digest('hex');
83
    assert.strictEqual(actual, expected);
84
  }
85
}
86
 
87
export const hmac_correctness_tests = {
88
  async test(ctrl, env, ctx) {
89
    {
90
      // Test HMAC with multiple updates.
91
      testHmac(
92
        'sha1',
93
        'Node',
94
        ['some data', 'to hmac'],
95
        '19fd6e1ba73d9ed2224dd5094a71babe85d9a892'
96
      );
97
    }
98
 
99
    // Test HMAC (Wikipedia Test Cases)
100
    const wikipedia = [
101
      {
102
        key: 'key',
103
        data: 'The quick brown fox jumps over the lazy dog',
104
        hmac: {
105
          // HMACs lifted from Wikipedia.
106
          md5: '80070713463e7749b90c2dc24911e275',
107
          sha1: 'de7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9',
108
          sha256:
109
            'f7bc83f430538424b13298e6aa6fb143ef4d59a14946175997479dbc' +
110
            '2d1a3cd8',
111
        },
112
      },
113
      {
114
        key: 'key',
115
        data: '',
116
        hmac: {
117
          // Intermediate test to help debugging.
118
          md5: '63530468a04e386459855da0063b6596',
119
          sha1: 'f42bb0eeb018ebbd4597ae7213711ec60760843f',
120
          sha256:
121
            '5d5d139563c95b5967b9bd9a8c9b233a9dedb45072794cd232dc1b74' +
122
            '832607d0',
123
        },
124
      },
125
      {
126
        key: '',
127
        data: 'The quick brown fox jumps over the lazy dog',
128
        hmac: {
129
          // Intermediate test to help debugging.
130
          md5: 'ad262969c53bc16032f160081c4a07a0',
131
          sha1: '2ba7f707ad5f187c412de3106583c3111d668de8',
132
          sha256:
133
            'fb011e6154a19b9a4c767373c305275a5a69e8b68b0b4c9200c383dc' +
134
            'ed19a416',
135
        },
136
      },
137
      {
138
        key: '',
139
        data: '',
140
        hmac: {
141
          // HMACs lifted from Wikipedia.
142
          md5: '74e6f7298a9c2d168935f58c001bad88',
143
          sha1: 'fbdb1d1b18aa6c08324b7d64b71fb76370690e1d',
144
          sha256:
145
            'b613679a0814d9ec772f95d778c35fc5ff1697c493715653c6c71214' +
146
            '4292c5ad',
147
        },
148
      },
149
    ];
150
 
151
    for (const { key, data, hmac } of wikipedia) {
152
      for (const hash in hmac) testHmac(hash, key, data, hmac[hash]);
153
    }
154
 
155
    // Test HMAC-SHA-* (rfc 4231 Test Cases)
156
    const rfc4231 = [
157
      {
158
        key: Buffer.from('0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b', 'hex'),
159
        data: Buffer.from('4869205468657265', 'hex'), // 'Hi There'
160
        hmac: {
161
          sha224: '896fb1128abbdf196832107cd49df33f47b4b1169912ba4f53684b22',
162
          sha256:
163
            'b0344c61d8db38535ca8afceaf0bf12b881dc200c9833da726e9376c' +
164
            '2e32cff7',
165
          sha384:
166
            'afd03944d84895626b0825f4ab46907f15f9dadbe4101ec682aa034c' +
167
            '7cebc59cfaea9ea9076ede7f4af152e8b2fa9cb6',
168
          sha512:
169
            '87aa7cdea5ef619d4ff0b4241a1d6cb02379f4e2ce4ec2787ad0b305' +
170
            '45e17cdedaa833b7d6b8a702038b274eaea3f4e4be9d914eeb61f170' +
171
            '2e696c203a126854',
172
        },
173
      },
174
      {
175
        key: Buffer.from('4a656665', 'hex'), // 'Jefe'
176
        data: Buffer.from(
177
          '7768617420646f2079612077616e7420666f72206e6f74686' + '96e673f',
178
          'hex'
179
        ), // 'what do ya want for nothing?'
180
        hmac: {
181
          sha224: 'a30e01098bc6dbbf45690f3a7e9e6d0f8bbea2a39e6148008fd05e44',
182
          sha256:
183
            '5bdcc146bf60754e6a042426089575c75a003f089d2739839dec58b9' +
184
            '64ec3843',
185
          sha384:
186
            'af45d2e376484031617f78d2b58a6b1b9c7ef464f5a01b47e42ec373' +
187
            '6322445e8e2240ca5e69e2c78b3239ecfab21649',
188
          sha512:
189
            '164b7a7bfcf819e2e395fbe73b56e0a387bd64222e831fd610270cd7' +
190
            'ea2505549758bf75c05a994a6d034f65f8f0e6fdcaeab1a34d4a6b4b' +
191
            '636e070a38bce737',
192
        },
193
      },
194
      {
195
        key: Buffer.from('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa', 'hex'),
196
        data: Buffer.from(
197
          'ddddddddddddddddddddddddddddddddddddddddddddddddd' +
198
            'ddddddddddddddddddddddddddddddddddddddddddddddddddd',
199
          'hex'
200
        ),
201
        hmac: {
202
          sha224: '7fb3cb3588c6c1f6ffa9694d7d6ad2649365b0c1f65d69d1ec8333ea',
203
          sha256:
204
            '773ea91e36800e46854db8ebd09181a72959098b3ef8c122d9635514' +
205
            'ced565fe',
206
          sha384:
207
            '88062608d3e6ad8a0aa2ace014c8a86f0aa635d947ac9febe83ef4e5' +
208
            '5966144b2a5ab39dc13814b94e3ab6e101a34f27',
209
          sha512:
210
            'fa73b0089d56a284efb0f0756c890be9b1b5dbdd8ee81a3655f83e33' +
211
            'b2279d39bf3e848279a722c806b485a47e67c807b946a337bee89426' +
212
            '74278859e13292fb',
213
        },
214
      },
215
      {
216
        key: Buffer.from(
217
          '0102030405060708090a0b0c0d0e0f10111213141516171819',
218
          'hex'
219
        ),
220
        data: Buffer.from(
221
          'cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdc' +
222
            'dcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd',
223
          'hex'
224
        ),
225
        hmac: {
226
          sha224: '6c11506874013cac6a2abc1bb382627cec6a90d86efc012de7afec5a',
227
          sha256:
228
            '82558a389a443c0ea4cc819899f2083a85f0faa3e578f8077a2e3ff4' +
229
            '6729665b',
230
          sha384:
231
            '3e8a69b7783c25851933ab6290af6ca77a9981480850009cc5577c6e' +
232
            '1f573b4e6801dd23c4a7d679ccf8a386c674cffb',
233
          sha512:
234
            'b0ba465637458c6990e5a8c5f61d4af7e576d97ff94b872de76f8050' +
235
            '361ee3dba91ca5c11aa25eb4d679275cc5788063a5f19741120c4f2d' +
236
            'e2adebeb10a298dd',
237
        },
238
      },
239
 
240
      {
241
        key: Buffer.from('0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c', 'hex'),
242
        // 'Test With Truncation'
243
        data: Buffer.from('546573742057697468205472756e636174696f6e', 'hex'),
244
        hmac: {
245
          sha224: '0e2aea68a90c8d37c988bcdb9fca6fa8',
246
          sha256: 'a3b6167473100ee06e0c796c2955552b',
247
          sha384: '3abf34c3503b2a23a46efc619baef897',
248
          sha512: '415fad6271580a531d4179bc891d87a6',
249
        },
250
        truncate: true,
251
      },
252
      {
253
        key: Buffer.from(
254
          'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
255
            'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
256
            'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
257
            'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
258
            'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
259
            'aaaaaaaaaaaa',
260
          'hex'
261
        ),
262
        // 'Test Using Larger Than Block-Size Key - Hash Key First'
263
        data: Buffer.from(
264
          '54657374205573696e67204c6172676572205468616e20426' +
265
            'c6f636b2d53697a65204b6579202d2048617368204b657920' +
266
            '4669727374',
267
          'hex'
268
        ),
269
        hmac: {
270
          sha224: '95e9a0db962095adaebe9b2d6f0dbce2d499f112f2d2b7273fa6870e',
271
          sha256:
272
            '60e431591ee0b67f0d8a26aacbf5b77f8e0bc6213728c5140546040f' +
273
            '0ee37f54',
274
          sha384:
275
            '4ece084485813e9088d2c63a041bc5b44f9ef1012a2b588f3cd11f05' +
276
            '033ac4c60c2ef6ab4030fe8296248df163f44952',
277
          sha512:
278
            '80b24263c7c1a3ebb71493c1dd7be8b49b46d1f41b4aeec1121b0137' +
279
            '83f8f3526b56d037e05f2598bd0fd2215d6a1e5295e64f73f63f0aec' +
280
            '8b915a985d786598',
281
        },
282
      },
283
      {
284
        key: Buffer.from(
285
          'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
286
            'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
287
            'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
288
            'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
289
            'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
290
            'aaaaaaaaaaaa',
291
          'hex'
292
        ),
293
        // 'This is a test using a larger than block-size key and a larger ' +
294
        // 'than block-size data. The key needs to be hashed before being ' +
295
        // 'used by the HMAC algorithm.'
296
        data: Buffer.from(
297
          '5468697320697320612074657374207573696e672061206c6' +
298
            '172676572207468616e20626c6f636b2d73697a65206b6579' +
299
            '20616e642061206c6172676572207468616e20626c6f636b2' +
300
            'd73697a6520646174612e20546865206b6579206e65656473' +
301
            '20746f20626520686173686564206265666f7265206265696' +
302
            'e6720757365642062792074686520484d414320616c676f72' +
303
            '6974686d2e',
304
          'hex'
305
        ),
306
        hmac: {
307
          sha224: '3a854166ac5d9f023f54d517d0b39dbd946770db9c2b95c9f6f565d1',
308
          sha256:
309
            '9b09ffa71b942fcb27635fbcd5b0e944bfdc63644f0713938a7f5153' +
310
            '5c3a35e2',
311
          sha384:
312
            '6617178e941f020d351e2f254e8fd32c602420feb0b8fb9adccebb82' +
313
            '461e99c5a678cc31e799176d3860e6110c46523e',
314
          sha512:
315
            'e37b6a775dc87dbaa4dfa9f96e5e3ffddebd71f8867289865df5a32d' +
316
            '20cdc944b6022cac3c4982b10d5eeb55c3e4de15134676fb6de04460' +
317
            '65c97440fa8c6a58',
318
        },
319
      },
320
    ];
321
 
322
    for (let i = 0, l = rfc4231.length; i < l; i++) {
323
      for (const hash in rfc4231[i].hmac) {
324
        const str = crypto.createHmac(hash, rfc4231[i].key);
325
        str.end(rfc4231[i].data);
326
        let strRes = str.read().toString('hex');
327
        let actual = crypto
328
          .createHmac(hash, rfc4231[i].key)
329
          .update(rfc4231[i].data)
330
          .digest('hex');
331
        if (rfc4231[i].truncate) {
332
          actual = actual.substr(0, 32); // first 128 bits == 32 hex chars
333
          strRes = strRes.substr(0, 32);
334
        }
335
        const expected = rfc4231[i].hmac[hash];
336
        assert.strictEqual(
337
          actual,
338
          expected,
339
          `Test HMAC-${hash} rfc 4231 case ${i + 1}: ${actual} must be ${expected}`
340
        );
341
        assert.strictEqual(
342
          actual,
343
          strRes,
344
          `Should get same result from stream (hash: ${hash} and case: ${i + 1})` +
345
            ` => ${actual} must be ${strRes}`
346
        );
347
      }
348
    }
349
 
350
    // Test HMAC-MD5/SHA1 (rfc 2202 Test Cases)
351
    const rfc2202_md5 = [
352
      {
353
        key: Buffer.from('0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b', 'hex'),
354
        data: 'Hi There',
355
        hmac: '9294727a3638bb1c13f48ef8158bfc9d',
356
      },
357
      {
358
        key: 'Jefe',
359
        data: 'what do ya want for nothing?',
360
        hmac: '750c783e6ab0b503eaa86e310a5db738',
361
      },
362
      {
363
        key: Buffer.from('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa', 'hex'),
364
        data: Buffer.from(
365
          'ddddddddddddddddddddddddddddddddddddddddddddddddd' +
366
            'ddddddddddddddddddddddddddddddddddddddddddddddddddd',
367
          'hex'
368
        ),
369
        hmac: '56be34521d144c88dbb8c733f0e8b3f6',
370
      },
371
      {
372
        key: Buffer.from(
373
          '0102030405060708090a0b0c0d0e0f10111213141516171819',
374
          'hex'
375
        ),
376
        data: Buffer.from(
377
          'cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdc' +
378
            'dcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd' +
379
            'cdcdcdcdcd',
380
          'hex'
381
        ),
382
        hmac: '697eaf0aca3a3aea3a75164746ffaa79',
383
      },
384
      {
385
        key: Buffer.from('0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c', 'hex'),
386
        data: 'Test With Truncation',
387
        hmac: '56461ef2342edc00f9bab995690efd4c',
388
      },
389
      {
390
        key: Buffer.from(
391
          'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
392
            'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
393
            'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
394
            'aaaaaaaaaaaaaaaaaaaaaa',
395
          'hex'
396
        ),
397
        data: 'Test Using Larger Than Block-Size Key - Hash Key First',
398
        hmac: '6b1ab7fe4bd7bf8f0b62e6ce61b9d0cd',
399
      },
400
      {
401
        key: Buffer.from(
402
          'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
403
            'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
404
            'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
405
            'aaaaaaaaaaaaaaaaaaaaaa',
406
          'hex'
407
        ),
408
        data:
409
          'Test Using Larger Than Block-Size Key and Larger Than One ' +
410
          'Block-Size Data',
411
        hmac: '6f630fad67cda0ee1fb1f562db3aa53e',
412
      },
413
    ];
414
 
415
    for (const { key, data, hmac } of rfc2202_md5)
416
      testHmac('md5', key, data, hmac);
417
 
418
    const rfc2202_sha1 = [
419
      {
420
        key: Buffer.from('0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b', 'hex'),
421
        data: 'Hi There',
422
        hmac: 'b617318655057264e28bc0b6fb378c8ef146be00',
423
      },
424
      {
425
        key: 'Jefe',
426
        data: 'what do ya want for nothing?',
427
        hmac: 'effcdf6ae5eb2fa2d27416d5f184df9c259a7c79',
428
      },
429
      {
430
        key: Buffer.from('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa', 'hex'),
431
        data: Buffer.from(
432
          'ddddddddddddddddddddddddddddddddddddddddddddd' +
433
            'ddddddddddddddddddddddddddddddddddddddddddddd' +
434
            'dddddddddd',
435
          'hex'
436
        ),
437
        hmac: '125d7342b9ac11cd91a39af48aa17b4f63f175d3',
438
      },
439
      {
440
        key: Buffer.from(
441
          '0102030405060708090a0b0c0d0e0f10111213141516171819',
442
          'hex'
443
        ),
444
        data: Buffer.from(
445
          'cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdc' +
446
            'dcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd' +
447
            'cdcdcdcdcd',
448
          'hex'
449
        ),
450
        hmac: '4c9007f4026250c6bc8414f9bf50c86c2d7235da',
451
      },
452
      {
453
        key: Buffer.from('0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c', 'hex'),
454
        data: 'Test With Truncation',
455
        hmac: '4c1a03424b55e07fe7f27be1d58bb9324a9a5a04',
456
      },
457
      {
458
        key: Buffer.from(
459
          'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
460
            'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
461
            'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
462
            'aaaaaaaaaaaaaaaaaaaaaa',
463
          'hex'
464
        ),
465
        data: 'Test Using Larger Than Block-Size Key - Hash Key First',
466
        hmac: 'aa4ae5e15272d00e95705637ce8a3b55ed402112',
467
      },
468
      {
469
        key: Buffer.from(
470
          'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
471
            'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
472
            'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
473
            'aaaaaaaaaaaaaaaaaaaaaa',
474
          'hex'
475
        ),
476
        data:
477
          'Test Using Larger Than Block-Size Key and Larger Than One ' +
478
          'Block-Size Data',
479
        hmac: 'e8e99d0f45237d786d6bbaa7965c7808bbff1a91',
480
      },
481
    ];
482
 
483
    for (const { key, data, hmac } of rfc2202_sha1)
484
      testHmac('sha1', key, data, hmac);
485
  },
486
};
487
 
488
export const hmac_misc_tests = {
489
  async test(ctrl, env, ctx) {
490
    assert.strictEqual(
491
      crypto.createHmac('sha256', 'w00t').digest('ucs2'),
492
      crypto.createHmac('sha256', 'w00t').digest().toString('ucs2')
493
    );
494
 
495
    // Check initialized -> uninitialized state transition after calling digest().
496
    {
497
      const expected =
498
        '\u0010\u0041\u0052\u00c5\u00bf\u00dc\u00a0\u007b\u00c6\u0033' +
499
        '\u00ee\u00bd\u0046\u0019\u009f\u0002\u0055\u00c9\u00f4\u009d';
500
      {
501
        const h = crypto.createHmac('sha1', 'key').update('data');
502
        assert.deepStrictEqual(
503
          h.digest('buffer'),
504
          Buffer.from(expected, 'latin1')
505
        );
506
        assert.deepStrictEqual(h.digest('buffer'), Buffer.from(''));
507
      }
508
      {
509
        const h = crypto.createHmac('sha1', 'key').update('data');
510
        assert.strictEqual(h.digest('latin1'), expected);
511
        assert.strictEqual(h.digest('latin1'), '');
512
      }
513
    }
514
 
515
    // Check initialized -> uninitialized state transition after calling digest().
516
    // Calls to update() omitted intentionally.
517
    {
518
      const expected =
519
        '\u00f4\u002b\u00b0\u00ee\u00b0\u0018\u00eb\u00bd\u0045\u0097' +
520
        '\u00ae\u0072\u0013\u0071\u001e\u00c6\u0007\u0060\u0084\u003f';
521
      {
522
        const h = crypto.createHmac('sha1', 'key');
523
        assert.deepStrictEqual(
524
          h.digest('buffer'),
525
          Buffer.from(expected, 'latin1')
526
        );
527
        assert.deepStrictEqual(h.digest('buffer'), Buffer.from(''));
528
      }
529
      {
530
        const h = crypto.createHmac('sha1', 'key');
531
        assert.strictEqual(h.digest('latin1'), expected);
532
        assert.strictEqual(h.digest('latin1'), '');
533
      }
534
    }
535
 
536
    {
537
      assert.throws(
538
        () => crypto.createHmac('sha7', 'key'),
539
        /Digest method not supported/
540
      );
541
    }
542
 
543
    {
544
      const buf = Buffer.alloc(0);
545
      const keyObject = crypto.createSecretKey(Buffer.alloc(0));
546
      assert.deepStrictEqual(
547
        crypto.createHmac('sha256', buf).update('foo').digest(),
548
        crypto.createHmac('sha256', keyObject).update('foo').digest()
549
      );
550
    }
551
  },
552
};