All files / lib/internal/crypto scrypt.js

100% Statements 141/141
84.09% Branches 37/44
100% Functions 4/4
100% Lines 141/141

Press n or j to go to the next uncovered block, b, p or k for the previous block.

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 14235x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 35x 33x 33x 14x 14x 14x 33x 33x 33x 33x 33x 33x 33x 33x 33x 33x 33x 33x 11x 11x 11x 11x 11x 1x 33x 33x 33x 33x 35x 42x 42x 42x 42x 42x 42x 42x 42x 42x 42x 17x 17x 17x 42x 42x 35x 75x 75x 75x 75x 75x 75x 75x 75x 75x 75x 50x 50x 26x 26x 26x 50x 10x 8x 8x 8x 46x 50x 26x 26x 26x 50x 10x 8x 8x 8x 42x 50x 26x 26x 26x 50x 10x 8x 8x 8x 50x 4x 4x 4x 50x 50x 50x 50x 50x 44x 44x 75x 35x 35x 35x 35x 35x  
'use strict';
 
const {
  FunctionPrototypeCall,
} = primordials;
 
const { Buffer } = require('buffer');
 
const {
  ScryptJob,
  kCryptoJobAsync,
  kCryptoJobSync,
} = internalBinding('crypto');
 
const {
  validateFunction,
  validateInteger,
  validateInt32,
  validateUint32,
} = require('internal/validators');
 
const {
  codes: {
    ERR_CRYPTO_SCRYPT_INVALID_PARAMETER,
    ERR_CRYPTO_SCRYPT_NOT_SUPPORTED,
  }
} = require('internal/errors');
 
const {
  getArrayBufferOrView,
  getDefaultEncoding,
} = require('internal/crypto/util');
 
const defaults = {
  N: 16384,
  r: 8,
  p: 1,
  maxmem: 32 << 20,  // 32 MiB, matches SCRYPT_MAX_MEM.
};
 
function scrypt(password, salt, keylen, options, callback = defaults) {
  if (callback === defaults) {
    callback = options;
    options = defaults;
  }
 
  options = check(password, salt, keylen, options);
  const { N, r, p, maxmem } = options;
  ({ password, salt, keylen } = options);
 
  validateFunction(callback, 'callback');
 
  const job = new ScryptJob(
    kCryptoJobAsync, password, salt, N, r, p, maxmem, keylen);
 
  const encoding = getDefaultEncoding();
  job.ondone = (error, result) => {
    if (error !== undefined)
      return FunctionPrototypeCall(callback, job, error);
    const buf = Buffer.from(result);
    if (encoding === 'buffer')
      return FunctionPrototypeCall(callback, job, null, buf);
    FunctionPrototypeCall(callback, job, null, buf.toString(encoding));
  };
 
  job.run();
}
 
function scryptSync(password, salt, keylen, options = defaults) {
  options = check(password, salt, keylen, options);
  const { N, r, p, maxmem } = options;
  ({ password, salt, keylen } = options);
  const job = new ScryptJob(
    kCryptoJobSync, password, salt, N, r, p, maxmem, keylen);
  const { 0: err, 1: result } = job.run();
 
  if (err !== undefined)
    throw err;
 
  const buf = Buffer.from(result);
  const encoding = getDefaultEncoding();
  return encoding === 'buffer' ? buf : buf.toString(encoding);
}
 
function check(password, salt, keylen, options) {
  if (ScryptJob === undefined)
    throw new ERR_CRYPTO_SCRYPT_NOT_SUPPORTED();
 
  password = getArrayBufferOrView(password, 'password');
  salt = getArrayBufferOrView(salt, 'salt');
  validateInt32(keylen, 'keylen', 0);
 
  let { N, r, p, maxmem } = defaults;
  if (options && options !== defaults) {
    const has_N = options.N !== undefined;
    if (has_N) {
      N = options.N;
      validateUint32(N, 'N');
    }
    if (options.cost !== undefined) {
      if (has_N) throw new ERR_CRYPTO_SCRYPT_INVALID_PARAMETER();
      N = options.cost;
      validateUint32(N, 'cost');
    }
    const has_r = (options.r !== undefined);
    if (has_r) {
      r = options.r;
      validateUint32(r, 'r');
    }
    if (options.blockSize !== undefined) {
      if (has_r) throw new ERR_CRYPTO_SCRYPT_INVALID_PARAMETER();
      r = options.blockSize;
      validateUint32(r, 'blockSize');
    }
    const has_p = options.p !== undefined;
    if (has_p) {
      p = options.p;
      validateUint32(p, 'p');
    }
    if (options.parallelization !== undefined) {
      if (has_p) throw new ERR_CRYPTO_SCRYPT_INVALID_PARAMETER();
      p = options.parallelization;
      validateUint32(p, 'parallelization');
    }
    if (options.maxmem !== undefined) {
      maxmem = options.maxmem;
      validateInteger(maxmem, 'maxmem', 0);
    }
    if (N === 0) N = defaults.N;
    if (r === 0) r = defaults.r;
    if (p === 0) p = defaults.p;
    if (maxmem === 0) maxmem = defaults.maxmem;
  }
 
  return { password, salt, keylen, N, r, p, maxmem };
}
 
module.exports = {
  scrypt,
  scryptSync,
};