Class: Rack::Auth::Digest::Nonce

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/auth/digest/nonce.rb

Overview

Rack::Auth::Digest::Nonce is the default nonce generator for the Rack::Auth::Digest::MD5 authentication handler.

private_key needs to set to a constant string.

time_limit can be optionally set to an integer (number of seconds), to limit the validity of the generated nonces.

Class Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(timestamp = Time.now, given_digest = nil) ⇒ Nonce

Returns a new instance of Nonce.



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# File 'lib/rack/auth/digest/nonce.rb', line 27

def initialize(timestamp = Time.now, given_digest = nil)
  @timestamp, @given_digest = timestamp.to_i, given_digest
end

Class Attribute Details

.private_key ⇒ Object

Returns the value of attribute private_key.



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# File 'lib/rack/auth/digest/nonce.rb', line 20

def private_key
  @private_key
end

.time_limit ⇒ Object

Returns the value of attribute time_limit.



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# File 'lib/rack/auth/digest/nonce.rb', line 20

def time_limit
  @time_limit
end

Class Method Details

.parse(string) ⇒ Object 



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# File 'lib/rack/auth/digest/nonce.rb', line 23

def self.parse(string)
  new(*Base64.decode64(string).split(' ', 2))
end

Instance Method Details

#digest ⇒ Object 



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# File 'lib/rack/auth/digest/nonce.rb', line 35

def digest
  ::Digest::MD5.hexdigest("#{@timestamp}:#{self.class.private_key}")
end

#fresh? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rack/auth/digest/nonce.rb', line 47

def fresh?
  !stale?
end

#stale? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rack/auth/digest/nonce.rb', line 43

def stale?
  !self.class.time_limit.nil? && (Time.now.to_i - @timestamp) > self.class.time_limit
end

#to_s ⇒ Object 



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# File 'lib/rack/auth/digest/nonce.rb', line 31

def to_s
  Base64.encode64("#{@timestamp} #{digest}").strip
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rack/auth/digest/nonce.rb', line 39

def valid?
  digest == @given_digest
end