File: securerandom.rb [securerandom: Ruby Standard Library Documentation]

Last Modified
  2019-10-01 04:02:30 -0700
Requires
  - openssl

## Description

## Secure random number generator interface.¶ ↑

This library is an interface to secure random number generators which are suitable for generating session keys in HTTP cookies, etc.

You can use this library in your application by requiring it:

    require 'securerandom'

It supports the following secure random number generators:

- openssl

- /dev/urandom

- Win32

### Examples¶ ↑

Generate random hexadecimal strings:

    require 'securerandom'

    p SecureRandom.hex(10) #=> "52750b30ffbc7de3b362"
    p SecureRandom.hex(10) #=> "92b15d6c8dc4beb5f559"
    p SecureRandom.hex(13) #=> "39b290146bea6ce975c37cfc23"

Generate random base64 strings:

    p SecureRandom.base64(10) #=> "EcmTPZwWRAozdA=="
    p SecureRandom.base64(10) #=> "KO1nIU+p9DKxGg=="
    p SecureRandom.base64(12) #=> "7kJSM/MzBJI+75j8"

Generate random binary strings:

    p SecureRandom.random_bytes(10) #=> "\016\t{\370g\310pbr\301"
    p SecureRandom.random_bytes(10) #=> "\323U\030TO\234\357\020\a\337"

Generate UUIDs:

    p SecureRandom.uuid #=> "2d931510-d99f-494a-8c67-87feb05e1594"
    p SecureRandom.uuid #=> "bad85eb9-0713-4da7-8d36-07a8e4b00eab"