'use strict';
const common = require('../common');
if (!common.hasCrypto)
  common.skip('missing crypto');

const assert = require('assert');
const crypto = require('crypto');

{
  const Hmac = crypto.Hmac;
  const instance = crypto.Hmac('sha256', 'Node');
  assert(instance instanceof Hmac, 'Hmac is expected to return a new instance' +
                                   ' when called without `new`');
}

assert.throws(
  () => crypto.createHmac(null),
  {
    code: 'ERR_INVALID_ARG_TYPE',
    name: 'TypeError',
    message: 'The "hmac" argument must be of type string. Received null'
  });

// This used to segfault. See: https://github.com/nodejs/node/issues/9819
assert.throws(
  () => crypto.createHmac('sha256', 'key').digest({
    toString: () => { throw new Error('boom'); },
  }),
  {
    name: 'Error',
    message: 'boom'
  });

assert.throws(
  () => crypto.createHmac('sha1', null),
  {
    code: 'ERR_INVALID_ARG_TYPE',
    name: 'TypeError',
  });

function testHmac(algo, key, data, expected) {
  // FIPS does not support MD5.
  if (common.hasFipsCrypto && algo === 'md5')
    return;

  if (!Array.isArray(data))
    data = [data];

  // If the key is a Buffer, test Hmac with a key object as well.
  const keyWrappers = [
    (key) => key,
    ...(typeof key === 'string' ? [] : [crypto.createSecretKey]),
  ];

  for (const keyWrapper of keyWrappers) {
    const hmac = crypto.createHmac(algo, keyWrapper(key));
    for (const chunk of data)
      hmac.update(chunk);
    const actual = hmac.digest('hex');
    assert.strictEqual(actual, expected);
  }
}

{
  // Test HMAC with multiple updates.
  testHmac('sha1', 'Node', ['some data', 'to hmac'],
           '19fd6e1ba73d9ed2224dd5094a71babe85d9a892');
}

// Test HMAC (Wikipedia Test Cases)
const wikipedia = [
  {
    key: 'key', data: 'The quick brown fox jumps over the lazy dog',
    hmac: {  // HMACs lifted from Wikipedia.
      md5: '80070713463e7749b90c2dc24911e275',
      sha1: 'de7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9',
      sha256:
          'f7bc83f430538424b13298e6aa6fb143ef4d59a14946175997479dbc' +
          '2d1a3cd8'
    }
  },
  {
    key: 'key', data: '',
    hmac: {  // Intermediate test to help debugging.
      md5: '63530468a04e386459855da0063b6596',
      sha1: 'f42bb0eeb018ebbd4597ae7213711ec60760843f',
      sha256:
          '5d5d139563c95b5967b9bd9a8c9b233a9dedb45072794cd232dc1b74' +
          '832607d0'
    }
  },
  {
    key: '', data: 'The quick brown fox jumps over the lazy dog',
    hmac: {  // Intermediate test to help debugging.
      md5: 'ad262969c53bc16032f160081c4a07a0',
      sha1: '2ba7f707ad5f187c412de3106583c3111d668de8',
      sha256:
          'fb011e6154a19b9a4c767373c305275a5a69e8b68b0b4c9200c383dc' +
          'ed19a416'
    }
  },
  {
    key: '', data: '',
    hmac: {  // HMACs lifted from Wikipedia.
      md5: '74e6f7298a9c2d168935f58c001bad88',
      sha1: 'fbdb1d1b18aa6c08324b7d64b71fb76370690e1d',
      sha256:
          'b613679a0814d9ec772f95d778c35fc5ff1697c493715653c6c71214' +
          '4292c5ad'
    }
  },
];

for (const { key, data, hmac } of wikipedia) {
  for (const hash in hmac)
    testHmac(hash, key, data, hmac[hash]);
}

// Test HMAC-SHA-* (rfc 4231 Test Cases)
const rfc4231 = [
  {
    key: Buffer.from('0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b', 'hex'),
    data: Buffer.from('4869205468657265', 'hex'), // 'Hi There'
    hmac: {
      sha224: '896fb1128abbdf196832107cd49df33f47b4b1169912ba4f53684b22',
      sha256:
          'b0344c61d8db38535ca8afceaf0bf12b881dc200c9833da726e9376c' +
          '2e32cff7',
      sha384:
          'afd03944d84895626b0825f4ab46907f15f9dadbe4101ec682aa034c' +
          '7cebc59cfaea9ea9076ede7f4af152e8b2fa9cb6',
      sha512:
          '87aa7cdea5ef619d4ff0b4241a1d6cb02379f4e2ce4ec2787ad0b305' +
          '45e17cdedaa833b7d6b8a702038b274eaea3f4e4be9d914eeb61f170' +
          '2e696c203a126854'
    }
  },
  {
    key: Buffer.from('4a656665', 'hex'), // 'Jefe'
    data: Buffer.from('7768617420646f2079612077616e7420666f72206e6f74686' +
                     '96e673f', 'hex'), // 'what do ya want for nothing?'
    hmac: {
      sha224: 'a30e01098bc6dbbf45690f3a7e9e6d0f8bbea2a39e6148008fd05e44',
      sha256:
          '5bdcc146bf60754e6a042426089575c75a003f089d2739839dec58b9' +
          '64ec3843',
      sha384:
          'af45d2e376484031617f78d2b58a6b1b9c7ef464f5a01b47e42ec373' +
          '6322445e8e2240ca5e69e2c78b3239ecfab21649',
      sha512:
          '164b7a7bfcf819e2e395fbe73b56e0a387bd64222e831fd610270cd7' +
          'ea2505549758bf75c05a994a6d034f65f8f0e6fdcaeab1a34d4a6b4b' +
          '636e070a38bce737'
    }
  },
  {
    key: Buffer.from('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa', 'hex'),
    data: Buffer.from('ddddddddddddddddddddddddddddddddddddddddddddddddd' +
                     'ddddddddddddddddddddddddddddddddddddddddddddddddddd',
                      'hex'),
    hmac: {
      sha224: '7fb3cb3588c6c1f6ffa9694d7d6ad2649365b0c1f65d69d1ec8333ea',
      sha256:
          '773ea91e36800e46854db8ebd09181a72959098b3ef8c122d9635514' +
          'ced565fe',
      sha384:
          '88062608d3e6ad8a0aa2ace014c8a86f0aa635d947ac9febe83ef4e5' +
          '5966144b2a5ab39dc13814b94e3ab6e101a34f27',
      sha512:
          'fa73b0089d56a284efb0f0756c890be9b1b5dbdd8ee81a3655f83e33' +
          'b2279d39bf3e848279a722c806b485a47e67c807b946a337bee89426' +
          '74278859e13292fb'
    }
  },
  {
    key: Buffer.from('0102030405060708090a0b0c0d0e0f10111213141516171819',
                     'hex'),
    data: Buffer.from('cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdc' +
                     'dcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd',
                      'hex'),
    hmac: {
      sha224: '6c11506874013cac6a2abc1bb382627cec6a90d86efc012de7afec5a',
      sha256:
          '82558a389a443c0ea4cc819899f2083a85f0faa3e578f8077a2e3ff4' +
          '6729665b',
      sha384:
          '3e8a69b7783c25851933ab6290af6ca77a9981480850009cc5577c6e' +
          '1f573b4e6801dd23c4a7d679ccf8a386c674cffb',
      sha512:
          'b0ba465637458c6990e5a8c5f61d4af7e576d97ff94b872de76f8050' +
          '361ee3dba91ca5c11aa25eb4d679275cc5788063a5f19741120c4f2d' +
          'e2adebeb10a298dd'
    }
  },

  {
    key: Buffer.from('0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c', 'hex'),
    // 'Test With Truncation'
    data: Buffer.from('546573742057697468205472756e636174696f6e', 'hex'),
    hmac: {
      sha224: '0e2aea68a90c8d37c988bcdb9fca6fa8',
      sha256: 'a3b6167473100ee06e0c796c2955552b',
      sha384: '3abf34c3503b2a23a46efc619baef897',
      sha512: '415fad6271580a531d4179bc891d87a6'
    },
    truncate: true
  },
  {
    key: Buffer.from('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaa', 'hex'),
    // 'Test Using Larger Than Block-Size Key - Hash Key First'
    data: Buffer.from('54657374205573696e67204c6172676572205468616e20426' +
                     'c6f636b2d53697a65204b6579202d2048617368204b657920' +
                     '4669727374', 'hex'),
    hmac: {
      sha224: '95e9a0db962095adaebe9b2d6f0dbce2d499f112f2d2b7273fa6870e',
      sha256:
          '60e431591ee0b67f0d8a26aacbf5b77f8e0bc6213728c5140546040f' +
          '0ee37f54',
      sha384:
          '4ece084485813e9088d2c63a041bc5b44f9ef1012a2b588f3cd11f05' +
          '033ac4c60c2ef6ab4030fe8296248df163f44952',
      sha512:
          '80b24263c7c1a3ebb71493c1dd7be8b49b46d1f41b4aeec1121b0137' +
          '83f8f3526b56d037e05f2598bd0fd2215d6a1e5295e64f73f63f0aec' +
          '8b915a985d786598'
    }
  },
  {
    key: Buffer.from('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaa', 'hex'),
    // 'This is a test using a larger than block-size key and a larger ' +
    // 'than block-size data. The key needs to be hashed before being ' +
    // 'used by the HMAC algorithm.'
    data: Buffer.from('5468697320697320612074657374207573696e672061206c6' +
                     '172676572207468616e20626c6f636b2d73697a65206b6579' +
                     '20616e642061206c6172676572207468616e20626c6f636b2' +
                     'd73697a6520646174612e20546865206b6579206e65656473' +
                     '20746f20626520686173686564206265666f7265206265696' +
                     'e6720757365642062792074686520484d414320616c676f72' +
                     '6974686d2e', 'hex'),
    hmac: {
      sha224: '3a854166ac5d9f023f54d517d0b39dbd946770db9c2b95c9f6f565d1',
      sha256:
          '9b09ffa71b942fcb27635fbcd5b0e944bfdc63644f0713938a7f5153' +
          '5c3a35e2',
      sha384:
          '6617178e941f020d351e2f254e8fd32c602420feb0b8fb9adccebb82' +
          '461e99c5a678cc31e799176d3860e6110c46523e',
      sha512:
          'e37b6a775dc87dbaa4dfa9f96e5e3ffddebd71f8867289865df5a32d' +
          '20cdc944b6022cac3c4982b10d5eeb55c3e4de15134676fb6de04460' +
          '65c97440fa8c6a58'
    }
  },
];

for (let i = 0, l = rfc4231.length; i < l; i++) {
  for (const hash in rfc4231[i].hmac) {
    const str = crypto.createHmac(hash, rfc4231[i].key);
    str.end(rfc4231[i].data);
    let strRes = str.read().toString('hex');
    let actual = crypto.createHmac(hash, rfc4231[i].key)
                       .update(rfc4231[i].data)
                       .digest('hex');
    if (rfc4231[i].truncate) {
      actual = actual.slice(0, 32); // first 128 bits == 32 hex chars
      strRes = strRes.slice(0, 32);
    }
    const expected = rfc4231[i].hmac[hash];
    assert.strictEqual(
      actual,
      expected,
      `Test HMAC-${hash} rfc 4231 case ${i + 1}: ${actual} must be ${expected}`
    );
    assert.strictEqual(
      actual,
      strRes,
      `Should get same result from stream (hash: ${hash} and case: ${i + 1})` +
      ` => ${actual} must be ${strRes}`
    );
  }
}

// Test HMAC-MD5/SHA1 (rfc 2202 Test Cases)
const rfc2202_md5 = [
  {
    key: Buffer.from('0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b', 'hex'),
    data: 'Hi There',
    hmac: '9294727a3638bb1c13f48ef8158bfc9d'
  },
  {
    key: 'Jefe',
    data: 'what do ya want for nothing?',
    hmac: '750c783e6ab0b503eaa86e310a5db738'
  },
  {
    key: Buffer.from('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa', 'hex'),
    data: Buffer.from('ddddddddddddddddddddddddddddddddddddddddddddddddd' +
                     'ddddddddddddddddddddddddddddddddddddddddddddddddddd',
                      'hex'),
    hmac: '56be34521d144c88dbb8c733f0e8b3f6'
  },
  {
    key: Buffer.from('0102030405060708090a0b0c0d0e0f10111213141516171819',
                     'hex'),
    data: Buffer.from('cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdc' +
                     'dcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd' +
                     'cdcdcdcdcd',
                      'hex'),
    hmac: '697eaf0aca3a3aea3a75164746ffaa79'
  },
  {
    key: Buffer.from('0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c', 'hex'),
    data: 'Test With Truncation',
    hmac: '56461ef2342edc00f9bab995690efd4c'
  },
  {
    key: Buffer.from('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaa',
                     'hex'),
    data: 'Test Using Larger Than Block-Size Key - Hash Key First',
    hmac: '6b1ab7fe4bd7bf8f0b62e6ce61b9d0cd'
  },
  {
    key: Buffer.from('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaa',
                     'hex'),
    data:
        'Test Using Larger Than Block-Size Key and Larger Than One ' +
        'Block-Size Data',
    hmac: '6f630fad67cda0ee1fb1f562db3aa53e'
  },
];

for (const { key, data, hmac } of rfc2202_md5)
  testHmac('md5', key, data, hmac);

const rfc2202_sha1 = [
  {
    key: Buffer.from('0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b', 'hex'),
    data: 'Hi There',
    hmac: 'b617318655057264e28bc0b6fb378c8ef146be00'
  },
  {
    key: 'Jefe',
    data: 'what do ya want for nothing?',
    hmac: 'effcdf6ae5eb2fa2d27416d5f184df9c259a7c79'
  },
  {
    key: Buffer.from('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa', 'hex'),
    data: Buffer.from('ddddddddddddddddddddddddddddddddddddddddddddd' +
                     'ddddddddddddddddddddddddddddddddddddddddddddd' +
                     'dddddddddd',
                      'hex'),
    hmac: '125d7342b9ac11cd91a39af48aa17b4f63f175d3'
  },
  {
    key: Buffer.from('0102030405060708090a0b0c0d0e0f10111213141516171819',
                     'hex'),
    data: Buffer.from('cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdc' +
                     'dcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd' +
                     'cdcdcdcdcd',
                      'hex'),
    hmac: '4c9007f4026250c6bc8414f9bf50c86c2d7235da'
  },
  {
    key: Buffer.from('0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c', 'hex'),
    data: 'Test With Truncation',
    hmac: '4c1a03424b55e07fe7f27be1d58bb9324a9a5a04'
  },
  {
    key: Buffer.from('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaa',
                     'hex'),
    data: 'Test Using Larger Than Block-Size Key - Hash Key First',
    hmac: 'aa4ae5e15272d00e95705637ce8a3b55ed402112'
  },
  {
    key: Buffer.from('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' +
                    'aaaaaaaaaaaaaaaaaaaaaa',
                     'hex'),
    data:
        'Test Using Larger Than Block-Size Key and Larger Than One ' +
        'Block-Size Data',
    hmac: 'e8e99d0f45237d786d6bbaa7965c7808bbff1a91'
  },
];

for (const { key, data, hmac } of rfc2202_sha1)
  testHmac('sha1', key, data, hmac);

assert.strictEqual(
  crypto.createHmac('sha256', 'w00t').digest('ucs2'),
  crypto.createHmac('sha256', 'w00t').digest().toString('ucs2'));

// Check initialized -> uninitialized state transition after calling digest().
{
  const expected =
      '\u0010\u0041\u0052\u00c5\u00bf\u00dc\u00a0\u007b\u00c6\u0033' +
      '\u00ee\u00bd\u0046\u0019\u009f\u0002\u0055\u00c9\u00f4\u009d';
  {
    const h = crypto.createHmac('sha1', 'key').update('data');
    assert.deepStrictEqual(h.digest('buffer'), Buffer.from(expected, 'latin1'));
    assert.deepStrictEqual(h.digest('buffer'), Buffer.from(''));
  }
  {
    const h = crypto.createHmac('sha1', 'key').update('data');
    assert.strictEqual(h.digest('latin1'), expected);
    assert.strictEqual(h.digest('latin1'), '');
  }
}

// Check initialized -> uninitialized state transition after calling digest().
// Calls to update() omitted intentionally.
{
  const expected =
      '\u00f4\u002b\u00b0\u00ee\u00b0\u0018\u00eb\u00bd\u0045\u0097' +
      '\u00ae\u0072\u0013\u0071\u001e\u00c6\u0007\u0060\u0084\u003f';
  {
    const h = crypto.createHmac('sha1', 'key');
    assert.deepStrictEqual(h.digest('buffer'), Buffer.from(expected, 'latin1'));
    assert.deepStrictEqual(h.digest('buffer'), Buffer.from(''));
  }
  {
    const h = crypto.createHmac('sha1', 'key');
    assert.strictEqual(h.digest('latin1'), expected);
    assert.strictEqual(h.digest('latin1'), '');
  }
}

{
  assert.throws(
    () => crypto.createHmac('sha7', 'key'),
    /Invalid digest/);
}

{
  const buf = Buffer.alloc(0);
  const keyObject = crypto.createSecretKey(Buffer.alloc(0));
  assert.deepStrictEqual(
    crypto.createHmac('sha256', buf).update('foo').digest(),
    crypto.createHmac('sha256', keyObject).update('foo').digest(),
  );
}

{
  crypto.Hmac('sha256', 'Node');
  common.expectWarning({
    DeprecationWarning: [
      ['crypto.Hmac constructor is deprecated.',
       'DEP0181'],
    ]
  });
}