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 24

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 17

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 17

def time_limit
  @time_limit
end

Class Method Details

.parse(string) ⇒ Object 



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

def self.parse(string)
  new(*string.unpack("m*").first.split(' ', 2))
end

Instance Method Details

#digest ⇒ Object 



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# File 'lib/rack/auth/digest/nonce.rb', line 32

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 44

def fresh?
  !stale?
end

#stale? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rack/auth/digest/nonce.rb', line 40

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 28

def to_s
  [([ @timestamp, digest ] * ' ')].pack("m*").strip
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rack/auth/digest/nonce.rb', line 36

def valid?
  digest == @given_digest
end