A CommonJS module for generating cryptographically secure pseudo-random numbers.
Works in Node.js, and should work in the browser as well, using Webpack or Browserify.
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Pull requests welcome. Please make sure your modifications are in line with the overall code style, and ensure that you're editing the files in
src/, not those in
Build tool of choice is
gulp; simply run
gulp while developing, and it will watch for changes.
Be aware that by making a pull request, you agree to release your modifications under the licenses stated above.
This module will return the result asynchronously - this is necessary to avoid blocking your entire application while generating a number.
var Promise = ;var randomNumber = ;Promise;
randomNumber(minimum, maximum, [cb])
Returns a Promise that resolves to a random number within the specified range.
Note that the range is inclusive, and both numbers must be integer values. It is not possible to securely generate a random value for floating point numbers, so if you are working with fractional numbers (eg.
1.24), you will have to decide on a fixed 'precision' and turn them into integer values (eg.
- minimum: The lowest possible value in the range.
- maximum: The highest possible value in the range. Inclusive.
Optionally also accepts a nodeback as
cb, but seriously, you should be using Promises.
Any errors that occur during the random number generation process will be of this type. The error object will also have a
code property, set to the string
The error message will provide more information, but this kind of error will generally mean that the arguments you've specified are somehow invalid.
- 1.0.2 (March 8, 2016): Security release! Patched handling of large numbers; input values are now checked for
MAX_SAFE_INTEGER, and the correct bitwise operator is used (
- 1.0.1 (March 8, 2016): Unimportant file cleanup.
- 1.0.0 (March 8, 2016): Initial release.