Module: SecureRandom
Relationships & Source Files | |
Super Chains via Extension / Inclusion / Inheritance | |
Class Chain:
self,
::Random::Formatter
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Defined in: | lib/securerandom.rb |
Overview
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:
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openssl
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/dev/urandom
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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"
Class Method Summary
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.gen_random(n)
See additional method definition at line 52.
::Random::Formatter - Extended
base64 |
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hex |
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random_bytes |
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urlsafe_base64 |
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uuid |
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gen_random |
Class Method Details
.gen_random(n)
See additional method definition at line 52.
# File 'lib/securerandom.rb', line 68
def self.gen_random(n) @pid = 0 unless defined?(@pid) pid = $$ unless @pid == pid now = Process.clock_gettime(Process::CLOCK_REALTIME, :nanosecond) ary = [now, @pid, pid] OpenSSL::Random.random_add(ary.join("").to_s, 0.0) seed = Random.raw_seed(16) if (seed) OpenSSL::Random.random_add(seed, 16) end @pid = pid end return OpenSSL::Random.random_bytes(n) end