require_relative "utils"

if defined?(OpenSSL)

class OpenSSL::TestSSLSession < OpenSSL::SSLTestCase
  def test_session
    start_server(PORT, OpenSSL::SSL::VERIFY_NONE, true) do |server, port|
      sock = TCPSocket.new("127.0.0.1", port)
      ctx = OpenSSL::SSL::SSLContext.new("TLSv1")
      ssl = OpenSSL::SSL::SSLSocket.new(sock, ctx)
      ssl.sync_close = true
      ssl.connect
      session = ssl.session
      assert(session == OpenSSL::SSL::Session.new(session.to_pem))
      assert(session == OpenSSL::SSL::Session.new(ssl))
      assert_equal(300, session.timeout)
      session.timeout = 5
      assert_equal(5, session.timeout)
      assert_not_nil(session.time)
      # SSL_SESSION_time keeps long value so we can't keep nsec fragment.
      session.time = t1 = Time.now.to_i
      assert_equal(Time.at(t1), session.time)
      if session.respond_to?(:id)
        assert_not_nil(session.id)
      end
      pem = session.to_pem
      assert_match(/\A-----BEGIN SSL SESSION PARAMETERS-----/, pem)
      assert_match(/-----END SSL SESSION PARAMETERS-----\Z/, pem)
      pem.gsub!(/-----(BEGIN|END) SSL SESSION PARAMETERS-----/, '').gsub!(/[\r\n]+/m, '')
      assert_equal(session.to_der, pem.unpack('m*')[0])
      assert_not_nil(session.to_text)
      ssl.close
    end
  end

  def test_client_session
    last_session = nil
    start_server(PORT, OpenSSL::SSL::VERIFY_NONE, true) do |server, port|
      2.times do
        sock = TCPSocket.new("127.0.0.1", port)
        # Debian's openssl 0.9.8g-13 failed at assert(ssl.session_reused?),
        # when use default SSLContext. [ruby-dev:36167]
        ctx = OpenSSL::SSL::SSLContext.new("TLSv1")
        ssl = OpenSSL::SSL::SSLSocket.new(sock, ctx)
        ssl.sync_close = true
        ssl.session = last_session if last_session
        ssl.connect

        session = ssl.session
        if last_session
          assert(ssl.session_reused?)

          if session.respond_to?(:id)
            assert_equal(session.id, last_session.id)
          end
          assert_equal(session.to_pem, last_session.to_pem)
          assert_equal(session.to_der, last_session.to_der)
          # Older version of OpenSSL may not be consistent.  Look up which versions later.
          assert_equal(session.to_text, last_session.to_text)
        else
          assert(!ssl.session_reused?)
        end
        last_session = session

        str = "x" * 100 + "\n"
        ssl.puts(str)
        assert_equal(str, ssl.gets)

        ssl.close
      end
    end
  end

  def test_server_session
    connections = 0
    saved_session = nil

    ctx_proc = Proc.new do |ctx, ssl|
# add test for session callbacks here
    end

    server_proc = Proc.new do |ctx, ssl|
      session = ssl.session
      stats = ctx.session_cache_stats

      case connections
      when 0
        assert_equal(stats[:cache_num], 1)
        assert_equal(stats[:cache_hits], 0)
        assert_equal(stats[:cache_misses], 0)
        assert(!ssl.session_reused?)
      when 1
        assert_equal(stats[:cache_num], 1)
        assert_equal(stats[:cache_hits], 1)
        assert_equal(stats[:cache_misses], 0)
        assert(ssl.session_reused?)
        ctx.session_remove(session)
        saved_session = session
      when 2
        assert_equal(stats[:cache_num], 1)
        assert_equal(stats[:cache_hits], 1)
        assert_equal(stats[:cache_misses], 1)
        assert(!ssl.session_reused?)
        ctx.session_add(saved_session)
      when 3
        assert_equal(stats[:cache_num], 2)
        assert_equal(stats[:cache_hits], 2)
        assert_equal(stats[:cache_misses], 1)
        assert(ssl.session_reused?)
        ctx.flush_sessions(Time.now + 5000)
      when 4
        assert_equal(stats[:cache_num], 1)
        assert_equal(stats[:cache_hits], 2)
        assert_equal(stats[:cache_misses], 2)
        assert(!ssl.session_reused?)
        ctx.session_add(saved_session)
      end
      connections += 1

      readwrite_loop(ctx, ssl)
    end

    first_session = nil
    start_server(PORT, OpenSSL::SSL::VERIFY_NONE, true, :ctx_proc => ctx_proc, :server_proc => server_proc) do |server, port|
      10.times do |i|
        sock = TCPSocket.new("127.0.0.1", port)
        ctx = OpenSSL::SSL::SSLContext.new
        if defined?(OpenSSL::SSL::OP_NO_TICKET)
          # disable RFC4507 support
          ctx.options = OpenSSL::SSL::OP_NO_TICKET
        end
        ssl = OpenSSL::SSL::SSLSocket.new(sock, ctx)
        ssl.sync_close = true
        ssl.session = first_session if first_session
        ssl.connect

        session = ssl.session
        if first_session
          case i
          when 1; assert(ssl.session_reused?)
          when 2; assert(!ssl.session_reused?)
          when 3; assert(ssl.session_reused?)
          when 4; assert(!ssl.session_reused?)
          when 5..10; assert(ssl.session_reused?)
          end
        end
        first_session ||= session

        str = "x" * 100 + "\n"
        ssl.puts(str)
        assert_equal(str, ssl.gets)

        ssl.close
      end
    end
  end

  def test_ctx_client_session_cb
    called = {}
    ctx = OpenSSL::SSL::SSLContext.new("SSLv3")
    ctx.session_cache_mode = OpenSSL::SSL::SSLContext::SESSION_CACHE_CLIENT

    ctx.session_new_cb = lambda { |ary|
      sock, sess = ary
      called[:new] = [sock, sess]
    }

    ctx.session_remove_cb = lambda { |ary|
      ctx, sess = ary
      called[:remove] = [ctx, sess]
      # any resulting value is OK (ignored)
    }

    start_server(PORT, OpenSSL::SSL::VERIFY_NONE, true) do |server, port|
      sock = TCPSocket.new("127.0.0.1", port)
      ssl = OpenSSL::SSL::SSLSocket.new(sock, ctx)
      ssl.sync_close = true
      ssl.connect
      assert_equal(1, ctx.session_cache_stats[:cache_num])
      assert_equal(1, ctx.session_cache_stats[:connect_good])
      assert_equal([ssl, ssl.session], called[:new])
      assert(ctx.session_remove(ssl.session))
      assert(!ctx.session_remove(ssl.session))
      assert_equal([ctx, ssl.session], called[:remove])
      ssl.close
    end
  end

  def test_ctx_server_session_cb
    called = {}

    ctx_proc = Proc.new { |ctx, ssl|
      ctx.session_cache_mode = OpenSSL::SSL::SSLContext::SESSION_CACHE_SERVER
      last_server_session = nil

      # get_cb is called whenever a client proposed to resume a session but
      # the session could not be found in the internal session cache.
      ctx.session_get_cb = lambda { |ary|
        sess, data = ary
        if last_server_session
          called[:get2] = [sess, data]
          last_server_session
        else
          called[:get1] = [sess, data]
          last_server_session = sess
          nil
        end
      }

      ctx.session_new_cb = lambda { |ary|
        sock, sess = ary
        called[:new] = [sock, sess]
        # SSL server doesn't cache sessions so get_cb is called next time.
        ctx.session_remove(sess)
      }

      ctx.session_remove_cb = lambda { |ary|
        ctx, sess = ary
        called[:remove] = [ctx, sess]
      }
    }

    server_proc = Proc.new { |c, ssl|
      session = ssl.session
      stats = c.session_cache_stats
      readwrite_loop(c, ssl)
    }
    start_server(PORT, OpenSSL::SSL::VERIFY_NONE, true, :ctx_proc => ctx_proc, :server_proc => server_proc) do |server, port|
      last_client_session = nil
      3.times do
        sock = TCPSocket.new("127.0.0.1", port)
        ssl = OpenSSL::SSL::SSLSocket.new(sock, OpenSSL::SSL::SSLContext.new("SSLv3"))
        ssl.sync_close = true
        ssl.session = last_client_session if last_client_session
        ssl.connect
        last_client_session = ssl.session
        ssl.close
        assert(called.delete(:new))
        assert(called.delete(:remove))
      end
    end
    assert(called[:get1])
    assert(called[:get2])
  end
end

end