Class: SASL::DigestMD5

Inherits:
Mechanism show all
Defined in:
lib/sasl/digest_md5.rb

Overview

RFC 2831: tools.ietf.org/html/rfc2831

Instance Attribute Summary collapse

Attributes inherited from Mechanism

#mechanism, #preferences

Instance Method Summary collapse

Methods inherited from Mechanism

#failure?, #success?

Constructor Details

#initialize(*a) ⇒ DigestMD5

Returns a new instance of DigestMD5.



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# File 'lib/sasl/digest_md5.rb', line 10

def initialize(*a)
  super
  @nonce_count = 0
end

Instance Attribute Details

#cnonce=(value) ⇒ Object (writeonly)

Sets the attribute cnonce

Parameters:

  • value —

    the value to set the attribute cnonce to.



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# File 'lib/sasl/digest_md5.rb', line 8

def cnonce=(value)
  @cnonce = value
end

Instance Method Details

#receive(message_name, content) ⇒ Object 



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# File 'lib/sasl/digest_md5.rb', line 25

def receive(message_name, content)
  if message_name == 'challenge'
    c = decode_challenge(content)

    unless c['rspauth']
      response = {}
      if defined?(@nonce) && response['nonce'].nil?
        # Could be reauth
      else
        # No reauth:
        @nonce_count = 0
      end
      @nonce ||= c['nonce']
      response['nonce'] = @nonce
      response['charset'] = 'utf-8'
      response['username'] = preferences.username
      response['realm'] = c['realm'] || preferences.realm
      @cnonce = generate_nonce unless defined? @cnonce
      response['cnonce'] = @cnonce
      @nc = next_nc
      response['nc'] = @nc
      @qop = c['qop'] || 'auth'
      response['qop'] = @qop
      response['digest-uri'] = preferences.digest_uri
      response['response'] = response_value(response['nonce'], response['nc'], response['cnonce'], response['qop'])
      ['response', encode_response(response)]
    else
      rspauth_expected = response_value(@nonce, @nc, @cnonce, @qop, '')
      p :rspauth_received=>c['rspauth'], :rspauth_expected=>rspauth_expected
      if c['rspauth'] == rspauth_expected
        ['response', nil]
      else
        # Bogus server?
        @state = :failure
        ['failure', nil]
      end
    end
  else
    # No challenge? Might be success or failure
    super
  end
end

#start ⇒ Object 



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# File 'lib/sasl/digest_md5.rb', line 15

def start
  @state = nil
  unless defined? @nonce
    ['auth', nil]
  else
    # reauthentication
    receive('challenge', '')
  end
end