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Member "Atom/resources/app/apm/node_modules/request/node_modules/uuid/lib/rng-browser.js" (7 Feb 2017, 938 Bytes) of archive /windows/misc/atom-windows.zip:


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    1 // Unique ID creation requires a high quality random # generator.  In the
    2 // browser this is a little complicated due to unknown quality of Math.random()
    3 // and inconsistent support for the `crypto` API.  We do the best we can via
    4 // feature-detection
    5 var rng;
    6 
    7 var crypto = global.crypto || global.msCrypto; // for IE 11
    8 if (crypto && crypto.getRandomValues) {
    9   // WHATWG crypto RNG - http://wiki.whatwg.org/wiki/Crypto
   10   var rnds8 = new Uint8Array(16);
   11   rng = function whatwgRNG() {
   12     crypto.getRandomValues(rnds8);
   13     return rnds8;
   14   };
   15 }
   16 
   17 if (!rng) {
   18   // Math.random()-based (RNG)
   19   //
   20   // If all else fails, use Math.random().  It's fast, but is of unspecified
   21   // quality.
   22   var  rnds = new Array(16);
   23   rng = function() {
   24     for (var i = 0, r; i < 16; i++) {
   25       if ((i & 0x03) === 0) r = Math.random() * 0x100000000;
   26       rnds[i] = r >>> ((i & 0x03) << 3) & 0xff;
   27     }
   28 
   29     return rnds;
   30   };
   31 }
   32 
   33 module.exports = rng;