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5文字で書くJavaScript/ Shibuya.XSS techtalk #10

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5文字で書くJavaScript/ Shibuya.XSS techtalk #10

Shibuya.XSS techtalk #10 の発表資料です。

Avatar for Masato Kinugawa

Masato Kinugawa

December 13, 2017
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Transcript

  1. |>|>|>|>|>|>|>|>|>|>|>|>|>|>|>|>|>|> >|>|>|>|>|>|>|>|>|>|>|>|>|>|>|>|>|> |>|>|>|>|>|>|>|>|>|>|> |>|>|>|>|>|>|>|>|>|>|>

  2. • • •

  3. None
  4. None

  5. • • http://utf-8.jp/public/jjencode.html

  6. • •

  7. • • 0 1 2 3 4 5 6 7

    8 9 a b c d e f g h i j k l m n o p q r s t u v w x y z A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
  8. None
  9. None

  10. BANG!

  11. |>

  12. https://github.com/tc39/proposal-pipeline-operator The pipeline operator is essentially a useful syntactic sugar

    on a function call with a single argument. |>

  13. alert(1)

  14. 1 |> alert

  15. • []()!+|> 8-2=6

  16. • [] !+|> 6-1=5

  17. • []+|> 5

  18. • • •

  19. None

  20. • •

  21. > Function("alert(1)") < ƒ anonymous() {alert(1)}

  22. > Function("alert(1)")() OK

  23. > [].constructor

  24. > []["constructor"]

  25. > []["constructor"] === Array < true > []["constructor"]["constructor"] === Function

    < true

  26. > []["constructor"]["constructor"]("alert(1)")() OK

  27. > []["constructor"]["constructor"]("CODE")()

  28. > []["constructor"]["constructor"]("CODE")()

  29. > "CODE"|>[]["constructor"]["constructor"] > []["constructor"]["constructor"]("CODE")

  30. > []|>"CODE"|>[]["constructor"]["constructor"] > []["constructor"]["constructor"]("CODE")()

  31. exclaim(capitalize(doubleSay("hello"))); "hello" |> doubleSay |> capitalize |> exclaim;

  32. > ("CODE"|>[]["constructor"]["constructor"])()

  33. > ["CODE"|>[]["constructor"]["constructor"]][0]() ( Expression ) [ Expression ][0]

  34. > []|>["CODE"|>[]["constructor"]["constructor"]][0]

  35. > []|>["CODE"|>[]["constructor"]["constructor"]][0]

  36. //JSFuckの基本型 []["constructor"]["constructor"]("CODE")() //5文字JSの基本型 []|>["CODE"|>[]["constructor"]["constructor"]][0]

  37. None

  38. > +[] < 0

  39. > []>[] < false > [0]>[] < true

  40. > [][[]] < undefined

  41. > +[true][0] < 1 > +[true][0]+[true][0] < 2 > +[true][0]+[true][0]+[true][0]

    < 3 > ...

  42. > [true][0]+[] < "true" > [false][0]+[] < "false" > [undefined][0]+[]

    < "undefined"

  43. > ["true"][0][0] < "t" > ["true"][0][1] < "r" > ["true"][0][2]

    < "u"

  44. > []|>["CODE"|>[]["constructor"]["constructor"]][0]

  45. > []["fill"]+[] < "function fill() { [native code] }"

  46. None

  47. [[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[]]+[]][+[]]+[][[]]][+[]][+[[+[]]>[]][+[]]+[+[]]]+[[[]>[]]+[]][+[]][+[ [+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]+[]][+[]][+[[+[]] >[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[]]+[]][+[]]+[][[]]][+[]][+ [[+[]]>[]][+[]]+[+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]> []][+[]]+[[+[]]>[]][+[]]]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+ [[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[][[]]+[]][+[]][+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]] +[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[+[]]>[]]+[]][+[]][+[]]+[[[+[]]>[]]+[]][+[]][+[[+[]]>[]][+[]]]+[[ [+[]]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[]]+[]][+[]]+[][[ ]]][+[]][+[[+[]]>[]][+[]]+[+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]] [+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[+[]

    ]>[]]+[]][+[]][+[]]+[[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[]]+[]][+[]]+[][[]]][+[]][+[[+[]]>[]][+[]]+[+[]]]+ [[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]] ]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[ ]][+[]]]+[[[+[]]>[]]+[]][+[]][+[[+[]]>[]][+[]]]

  48. > []|>["alert(1)"|>[]["constructor"]["constructor"]][0]

  49. []|>[[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[+[]]>[]]+[] ][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[+[]]>[]]+[]][+[]][+[[+[]]>[]][+[]]]+[[[+[]]>[]] +[]][+[]][+[]]+[[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[]]+[]][+[]]+[][[]]][+[]][+[[+[]]>[]][+[]]+[+[]]]+[[[]>[]]+ []][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]+[]][+[]][+[ [+[]]>[]][+[]]+[+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]+[+[[+[]]>[]][+[]]][+[]]+[[][[[[]>[]]+[]] [+[]][+[]]+[[[[]>[]]+[]][+[]]+[][[]]][+[]][+[[+[]]>[]][+[]]+[+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[] ]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]+[]][+[]][+[[+[]]>[]][+[]]+[+[[+[]]>[]][+[] ]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]|>[][[[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[]]+[]][+[]]+[][[] ]][+[]][+[[+[]]>[]][+[]]+[+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[ ]]>[]][+[]]+[[+[]]>[]][+[]]]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[][[[[]>[]]+[]][+

    []][+[]]+[[[[]>[]]+[]][+[]]+[][[]]][+[]][+[[+[]]>[]][+[]]+[+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]> []][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[ +[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[][[]]+[]][+[]][+[[+[]]>[]][+[]]]+[[[]>[]]+ []][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[+[]]>[]]+[]][+[]][+[]]+[[[+[]]>[]]+[]][+[]][+ [[+[]]>[]][+[]]]+[[[+[]]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[] ]+[]][+[]]+[][[]]][+[]][+[[+[]]>[]][+[]]+[+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[] ]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[ [+[]]>[]]+[]][+[]][+[]]+[[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[]]+[]][+[]]+[][[]]][+[]][+[[+[]]>[]][+[]]+[+[]]]+ [[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]+[] ][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[ [+[]]>[]]+[]][+[]][+[[+[]]>[]][+[]]]][[[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[]]+[]][+[]]+[][[]]][+[]][+[[+[]]>[] ][+[]]+[+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]] >[]][+[]]]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[]] +[]][+[]]+[][[]]][+[]][+[[+[]]>[]][+[]]+[+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[]] +[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[ ]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[][[]]+[]][+[]][+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[ ]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[+[]]>[]]+[]][+[]][+[]]+[[[+[]]>[]]+[]][+[]][+[[+[]]>[]][+[]]]+[ [[+[]]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[]]+[]][+[]]+[][[]]] [+[]][+[[+[]]>[]][+[]]+[+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]] >[]][+[]]+[[+[]]>[]][+[]]]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[+[]]>[]]+[]][+[]] [+[]]+[[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[]]+[]][+[]]+[][[]]][+[]][+[[+[]]>[]][+[]]+[+[]]]+[[[]>[]]+[]][+[]][ +[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]+[]][+[]][+[[+[]]>[]] [+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[+[]]>[]]+[]][+[]] [+[[+[]]>[]][+[]]]]][+[]]

  50. []|>[[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[+[]]>[]]+[] ][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[+[]]>[]]+[]][+[]][+[[+[]]>[]][+[]]]+[[[+[]]>[]] +[]][+[]][+[]]+[[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[]]+[]][+[]]+[][[]]][+[]][+[[+[]]>[]][+[]]+[+[]]]+[[[]>[]]+ []][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]+[]][+[]][+[ [+[]]>[]][+[]]+[+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]+[+[[+[]]>[]][+[]]][+[]]+[[][[[[]>[]]+[]] [+[]][+[]]+[[[[]>[]]+[]][+[]]+[][[]]][+[]][+[[+[]]>[]][+[]]+[+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[] ]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]+[]][+[]][+[[+[]]>[]][+[]]+[+[[+[]]>[]][+[] ]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]|>[][[[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[]]+[]][+[]]+[][[] ]][+[]][+[[+[]]>[]][+[]]+[+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[ ]]>[]][+[]]+[[+[]]>[]][+[]]]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[][[[[]>[]]+[]][+

    []][+[]]+[[[[]>[]]+[]][+[]]+[][[]]][+[]][+[[+[]]>[]][+[]]+[+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]> []][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[ +[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[][[]]+[]][+[]][+[[+[]]>[]][+[]]]+[[[]>[]]+ []][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[+[]]>[]]+[]][+[]][+[]]+[[[+[]]>[]]+[]][+[]][+ [[+[]]>[]][+[]]]+[[[+[]]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[] ]+[]][+[]]+[][[]]][+[]][+[[+[]]>[]][+[]]+[+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[] ]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[ [+[]]>[]]+[]][+[]][+[]]+[[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[]]+[]][+[]]+[][[]]][+[]][+[[+[]]>[]][+[]]+[+[]]]+ [[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]+[] ][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[ [+[]]>[]]+[]][+[]][+[[+[]]>[]][+[]]]][[[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[]]+[]][+[]]+[][[]]][+[]][+[[+[]]>[] ][+[]]+[+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]] >[]][+[]]]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[]] +[]][+[]]+[][[]]][+[]][+[[+[]]>[]][+[]]+[+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[]] +[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[ ]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[][[]]+[]][+[]][+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[ ]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[+[]]>[]]+[]][+[]][+[]]+[[[+[]]>[]]+[]][+[]][+[[+[]]>[]][+[]]]+[ [[+[]]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[]]+[]][+[]]+[][[]]] [+[]][+[[+[]]>[]][+[]]+[+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]] >[]][+[]]+[[+[]]>[]][+[]]]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[+[]]>[]]+[]][+[]] [+[]]+[[][[[[]>[]]+[]][+[]][+[]]+[[[[]>[]]+[]][+[]]+[][[]]][+[]][+[[+[]]>[]][+[]]+[+[]]]+[[[]>[]]+[]][+[]][ +[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[]>[]]+[]][+[]][+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]]+[]][+[]][+[[+[]]>[]] [+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]+[[+[]]>[]][+[]]]+[[[+[]]>[]]+[]][+[]] [+[[+[]]>[]][+[]]]]][+[]] OK

  51. unescape("%u0051")

  52. https://syllab.fr/projets/experiments/xcharsjs/5chars.pipeline. html https://babeljs.io/repl/build/5099/#?babili=false&browsers=& build=&builtIns=false&code_lz=IwHwfAhgNgpgTgFyA&debug=f alse&circleciRepo=&evaluate=true&lineWrap=false&presets=st age-0&prettier=false&targets=&version=7.0.0- beta.2%2Bpr.6335

  53. • •

  54. |>|>|>|>|>|>|>|>|>|>|>|>|>|>|>|>|>|> >|>|>|>|>|>|>|>|>|>|>|>|>|>|>|>|>|>