Class: OpenID::Consumer::DiffieHellmanSession

Inherits:
Object
  • Object
show all
Defined in:
lib/openid/consumer/associationmanager.rb

Overview

A superclass for implementing Diffie-Hellman association sessions.

Class Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(dh = nil) ⇒ DiffieHellmanSession

Returns a new instance of DiffieHellmanSession.



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# File 'lib/openid/consumer/associationmanager.rb', line 18

def initialize(dh=nil)
  if dh.nil?
    dh = DiffieHellman.from_defaults
  end
  @dh = dh
end

Class Attribute Details

.allowed_assoc_types ⇒ Object (readonly)

Returns the value of attribute allowed_assoc_types.



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# File 'lib/openid/consumer/associationmanager.rb', line 14

def allowed_assoc_types
  @allowed_assoc_types
end

.hashfunc ⇒ Object (readonly)

Returns the value of attribute hashfunc.



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# File 'lib/openid/consumer/associationmanager.rb', line 14

def hashfunc
  @hashfunc
end

.secret_size ⇒ Object (readonly)

Returns the value of attribute secret_size.



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# File 'lib/openid/consumer/associationmanager.rb', line 14

def secret_size
  @secret_size
end

.session_type ⇒ Object (readonly)

Returns the value of attribute session_type.



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# File 'lib/openid/consumer/associationmanager.rb', line 14

def session_type
  @session_type
end

Instance Method Details

#extract_secret(response) ⇒ Object

Process the response from a successful association request and return the shared secret for this association



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# File 'lib/openid/consumer/associationmanager.rb', line 39

def extract_secret(response)
  dh_server_public64 = response.get_arg(OPENID_NS, 'dh_server_public',
                                        NO_DEFAULT)
  enc_mac_key64 = response.get_arg(OPENID_NS, 'enc_mac_key', NO_DEFAULT)
  dh_server_public = CryptUtil.base64_to_num(dh_server_public64)
  enc_mac_key = Util.from_base64(enc_mac_key64)
  return @dh.xor_secret(self.class.hashfunc,
                        dh_server_public, enc_mac_key)
end

#get_request ⇒ Object

Return the query parameters for requesting an association using this Diffie-Hellman association session



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# File 'lib/openid/consumer/associationmanager.rb', line 27

def get_request
  args = {'dh_consumer_public' => CryptUtil.num_to_base64(@dh.public)}
  if (!@dh.using_default_values?)
    args['dh_modulus'] = CryptUtil.num_to_base64(@dh.modulus)
    args['dh_gen'] = CryptUtil.num_to_base64(@dh.generator)
  end

  return args
end