Module: DigestAuth

Defined in:
lib/digest_auth.rb

Overview

Written by Eric Hodel <[email protected]>

HTTP Digest Authentication

Constant Summary collapse

CNONCE = 
@md5.hexdigest("%x" % (Time.now.to_i + rand(65535)))
@@nonce_count = 
-1

Class Method Summary collapse

Class Method Details

.gen_auth_header(uri, auth_header, is_IIS = false) ⇒ Object 



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# File 'lib/digest_auth.rb', line 10

def self.gen_auth_header(uri, auth_header, is_IIS = false)
  @@nonce_count += 1

  user = CGI.unescape uri.user
  password = CGI.unescape uri.password

  auth_header =~ /^(\w+) (.*)/

  params = {}
  $2.gsub(/(\w+)="(.*?)"/) { params[$1] = $2 }

  a_1 = "#{user}:#{params['realm']}:#{password}"
  a_2 = "GET:#{uri.path}"
  request_digest = ''
  request_digest << @md5.hexdigest(a_1)
  request_digest << ':' << params['nonce']
  request_digest << ':' << ('%08x' % @@nonce_count)
  request_digest << ':' << CNONCE
  request_digest << ':' << params['qop']
  request_digest << ':' << @md5.hexdigest(a_2)

  header = ''
  header << "Digest username=\"#{user}\", "
  header << "realm=\"#{params['realm']}\", "
  if is_IIS then
    header << "qop=\"#{params['qop']}\", "
  else
    header << "qop=#{params['qop']}, "
  end
  header << "uri=\"#{uri.path}\", "
  header << "nonce=\"#{params['nonce']}\", "
  header << "nc=#{'%08x' % @@nonce_count}, "
  header << "cnonce=\"#{CNONCE}\", "
  header << "response=\"#{@md5.hexdigest(request_digest)}\""

  return header
end