diff options
Diffstat (limited to 'deps/npm/node_modules/uuid/lib/rng-browser.js')
-rw-r--r-- | deps/npm/node_modules/uuid/lib/rng-browser.js | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/deps/npm/node_modules/uuid/lib/rng-browser.js b/deps/npm/node_modules/uuid/lib/rng-browser.js index ac39b1289b4..14d21170d55 100644 --- a/deps/npm/node_modules/uuid/lib/rng-browser.js +++ b/deps/npm/node_modules/uuid/lib/rng-browser.js @@ -2,25 +2,26 @@ // browser this is a little complicated due to unknown quality of Math.random() // and inconsistent support for the `crypto` API. We do the best we can via // feature-detection -var rng; -var crypto = global.crypto || global.msCrypto; // for IE 11 -if (crypto && crypto.getRandomValues) { +// getRandomValues needs to be invoked in a context where "this" is a Crypto implementation. +var getRandomValues = (typeof(crypto) != 'undefined' && crypto.getRandomValues.bind(crypto)) || + (typeof(msCrypto) != 'undefined' && msCrypto.getRandomValues.bind(msCrypto)); +if (getRandomValues) { // WHATWG crypto RNG - http://wiki.whatwg.org/wiki/Crypto var rnds8 = new Uint8Array(16); // eslint-disable-line no-undef - rng = function whatwgRNG() { - crypto.getRandomValues(rnds8); + + module.exports = function whatwgRNG() { + getRandomValues(rnds8); return rnds8; }; -} - -if (!rng) { +} else { // Math.random()-based (RNG) // // If all else fails, use Math.random(). It's fast, but is of unspecified // quality. var rnds = new Array(16); - rng = function() { + + module.exports = function mathRNG() { for (var i = 0, r; i < 16; i++) { if ((i & 0x03) === 0) r = Math.random() * 0x100000000; rnds[i] = r >>> ((i & 0x03) << 3) & 0xff; @@ -29,5 +30,3 @@ if (!rng) { return rnds; }; } - -module.exports = rng; |