Class: Mechanize::Chain::AuthHeaders

Inherits:
Object
  • Object
show all
Includes:
Handler
Defined in:
lib/mechanize/chain/auth_headers.rb

Constant Summary collapse

CNONCE = 
Digest::MD5.hexdigest("%x" % (Time.now.to_i + rand(65535)))
@@nonce_count = 
Hash.new(0)

Instance Attribute Summary

Attributes included from Handler

#chain

Instance Method Summary collapse

Constructor Details

#initialize(auth_hash, user, password, digest) ⇒ AuthHeaders

Returns a new instance of AuthHeaders.



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# File 'lib/mechanize/chain/auth_headers.rb', line 9

def initialize(auth_hash, user, password, digest)
  @auth_hash = auth_hash
  @user      = user
  @password  = password
  @digest    = digest
end

Instance Method Details

#gen_auth_header(uri, request, auth_header, is_IIS = false) ⇒ Object 



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# File 'lib/mechanize/chain/auth_headers.rb', line 37

def gen_auth_header(uri, request, auth_header, is_IIS = false)
  auth_header =~ /^(\w+) (.*)/

  params = {}
  $2.gsub(/(\w+)=("[^"]*"|[^,]*)/) {
    params[$1] = $2.gsub(/^"/, '').gsub(/"$/, '')
  }

  @@nonce_count[params['nonce']] += 1

  a_1 = "#{@user}:#{params['realm']}:#{@password}"
  a_2 = "#{request.method}:#{uri.path}"
  request_digest = ''
  request_digest << Digest::MD5.hexdigest(a_1)
  request_digest << ':' << params['nonce']
  request_digest << ':' << ('%08x' % @@nonce_count[params['nonce']])
  request_digest << ':' << CNONCE
  request_digest << ':' << params['qop']
  request_digest << ':' << Digest::MD5.hexdigest(a_2)

  header = ''
  header << "Digest username=\"#{@user}\", "
  if is_IIS then
    header << "qop=\"#{params['qop']}\", "
  else
    header << "qop=#{params['qop']}, "
  end
  header << "uri=\"#{uri.path}\", "
  header << %w{ algorithm opaque nonce realm }.map { |field|
    next unless params[field]
    "#{field}=\"#{params[field]}\""
  }.compact.join(', ')

  header << ", nc=#{'%08x' % @@nonce_count[params['nonce']]}, "
  header << "cnonce=\"#{CNONCE}\", "
  header << "response=\"#{Digest::MD5.hexdigest(request_digest)}\""

  return header
end

#handle(ctx, params) ⇒ Object 



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# File 'lib/mechanize/chain/auth_headers.rb', line 16

def handle(ctx, params)
  uri     = params[:uri]
  request = params[:request]

  if( @auth_hash[uri.host] )
    case @auth_hash[uri.host]
    when :basic
      request.basic_auth(@user, @password)
    when :iis_digest
      digest_response = self.gen_auth_header(uri,request, @digest, true)
      request['Authorization'] = digest_response
    when :digest
      if @digest
        digest_response = self.gen_auth_header(uri,request, @digest)
        request['Authorization'] = digest_response
      end
    end
  end
  super
end