index.js
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var r;
module.exports = function rand(len) {
if (!r)
r = new Rand(null);
return r.generate(len);
};
function Rand(rand) {
this.rand = rand;
}
module.exports.Rand = Rand;
Rand.prototype.generate = function generate(len) {
return this._rand(len);
};
if (typeof self === 'object') {
if (self.crypto && self.crypto.getRandomValues) {
// Modern browsers
Rand.prototype._rand = function _rand(n) {
var arr = new Uint8Array(n);
self.crypto.getRandomValues(arr);
return arr;
};
} else if (self.msCrypto && self.msCrypto.getRandomValues) {
// IE
Rand.prototype._rand = function _rand(n) {
var arr = new Uint8Array(n);
self.msCrypto.getRandomValues(arr);
return arr;
};
} else {
// Old junk
Rand.prototype._rand = function() {
throw new Error('Not implemented yet');
};
}
} else {
// Node.js or Web worker with no crypto support
try {
var crypto = require('crypto');
Rand.prototype._rand = function _rand(n) {
return crypto.randomBytes(n);
};
} catch (e) {
// Emulate crypto API using randy
Rand.prototype._rand = function _rand(n) {
var res = new Uint8Array(n);
for (var i = 0; i < res.length; i++)
res[i] = this.rand.getByte();
return res;
};
}
}