browser.js 4.3 KB

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  1. (function() {
  2. var nodeEnv = typeof require !== 'undefined' && typeof process !== 'undefined';
  3. var __module = nodeEnv ? module : {exports:{}};
  4. var __filename = 'preview-scripts/__node_modules/randomfill/browser.js';
  5. var __require = nodeEnv ? function (request) {
  6. return cc.require(request);
  7. } : function (request) {
  8. return __quick_compile_project__.require(request, __filename);
  9. };
  10. function __define (exports, require, module) {
  11. if (!nodeEnv) {__quick_compile_project__.registerModule(__filename, module);}(function (process,global){
  12. 'use strict'
  13. function oldBrowser () {
  14. throw new Error('secure random number generation not supported by this browser\nuse chrome, FireFox or Internet Explorer 11')
  15. }
  16. var safeBuffer = require('safe-buffer')
  17. var randombytes = require('randombytes')
  18. var Buffer = safeBuffer.Buffer
  19. var kBufferMaxLength = safeBuffer.kMaxLength
  20. var crypto = global.crypto || global.msCrypto
  21. var kMaxUint32 = Math.pow(2, 32) - 1
  22. function assertOffset (offset, length) {
  23. if (typeof offset !== 'number' || offset !== offset) { // eslint-disable-line no-self-compare
  24. throw new TypeError('offset must be a number')
  25. }
  26. if (offset > kMaxUint32 || offset < 0) {
  27. throw new TypeError('offset must be a uint32')
  28. }
  29. if (offset > kBufferMaxLength || offset > length) {
  30. throw new RangeError('offset out of range')
  31. }
  32. }
  33. function assertSize (size, offset, length) {
  34. if (typeof size !== 'number' || size !== size) { // eslint-disable-line no-self-compare
  35. throw new TypeError('size must be a number')
  36. }
  37. if (size > kMaxUint32 || size < 0) {
  38. throw new TypeError('size must be a uint32')
  39. }
  40. if (size + offset > length || size > kBufferMaxLength) {
  41. throw new RangeError('buffer too small')
  42. }
  43. }
  44. if ((crypto && crypto.getRandomValues) || !process.browser) {
  45. exports.randomFill = randomFill
  46. exports.randomFillSync = randomFillSync
  47. } else {
  48. exports.randomFill = oldBrowser
  49. exports.randomFillSync = oldBrowser
  50. }
  51. function randomFill (buf, offset, size, cb) {
  52. if (!Buffer.isBuffer(buf) && !(buf instanceof global.Uint8Array)) {
  53. throw new TypeError('"buf" argument must be a Buffer or Uint8Array')
  54. }
  55. if (typeof offset === 'function') {
  56. cb = offset
  57. offset = 0
  58. size = buf.length
  59. } else if (typeof size === 'function') {
  60. cb = size
  61. size = buf.length - offset
  62. } else if (typeof cb !== 'function') {
  63. throw new TypeError('"cb" argument must be a function')
  64. }
  65. assertOffset(offset, buf.length)
  66. assertSize(size, offset, buf.length)
  67. return actualFill(buf, offset, size, cb)
  68. }
  69. function actualFill (buf, offset, size, cb) {
  70. if (process.browser) {
  71. var ourBuf = buf.buffer
  72. var uint = new Uint8Array(ourBuf, offset, size)
  73. crypto.getRandomValues(uint)
  74. if (cb) {
  75. process.nextTick(function () {
  76. cb(null, buf)
  77. })
  78. return
  79. }
  80. return buf
  81. }
  82. if (cb) {
  83. randombytes(size, function (err, bytes) {
  84. if (err) {
  85. return cb(err)
  86. }
  87. bytes.copy(buf, offset)
  88. cb(null, buf)
  89. })
  90. return
  91. }
  92. var bytes = randombytes(size)
  93. bytes.copy(buf, offset)
  94. return buf
  95. }
  96. function randomFillSync (buf, offset, size) {
  97. if (typeof offset === 'undefined') {
  98. offset = 0
  99. }
  100. if (!Buffer.isBuffer(buf) && !(buf instanceof global.Uint8Array)) {
  101. throw new TypeError('"buf" argument must be a Buffer or Uint8Array')
  102. }
  103. assertOffset(offset, buf.length)
  104. if (size === undefined) size = buf.length - offset
  105. assertSize(size, offset, buf.length)
  106. return actualFill(buf, offset, size)
  107. }
  108. }).call(this,require("../process/browser.js"),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
  109. }
  110. if (nodeEnv) {
  111. __define(__module.exports, __require, __module);
  112. }
  113. else {
  114. __quick_compile_project__.registerModuleFunc(__filename, function () {
  115. __define(__module.exports, __require, __module);
  116. });
  117. }
  118. })();