+const crypto = require('crypto')
+
+/**
+ * Generate a cryptographically secure random number in the [0,1[ range
+ *
+ * @returns
+ */
+function secureRandom () {
+ return crypto.randomBytes(4).readUInt32LE() / 0x100000000
+}
+
/**
* @param max
* @param min
*/
function generateRandomInteger (max, min = 0) {
+ if (max < 0) {
+ throw new RangeError('Invalid interval')
+ }
+ max = Math.floor(max)
if (min) {
- return Math.floor(Math.random() * (max - min + 1) + min)
+ if (max < min || min < 0) {
+ throw new RangeError('Invalid interval')
+ }
+ min = Math.ceil(min)
+ return Math.floor(secureRandom() * (max - min + 1)) + min
}
- return Math.floor(Math.random() * max + 1)
+ return Math.floor(secureRandom() * (max + 1))
}
/**
type: 'conjunction'
})
-module.exports = { generateRandomInteger, sleep, LIST_FORMATTER }
+module.exports = { generateRandomInteger, sleep, secureRandom, LIST_FORMATTER }