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| 1 | +# -*- coding: UTF-8 -*- |
| 2 | +"""AAEncode Codec - aaencode content encoding. |
| 3 | +
|
| 4 | +AAEncode, created by Yosuke Hasegawa, converts JavaScript code into a JavaScript program made of Japanese-style |
| 5 | + emoticons ("kaomoji", e.g. "ﾟωﾟﾉ" or "(ﾟДﾟ)") that runs the code. The program builds the digits and the letters it |
| 6 | + needs from the string representations of JavaScript values (e.g. "false" or "undefined"), gets the Function constructor |
| 7 | + through "(3).constructor.constructor" and calls it on a string literal holding the code, each character being written |
| 8 | + as an octal ("\\NNN") or Unicode ("\\uXXXX") escape sequence of its UTF-16 code unit. |
| 9 | +
|
| 10 | +Encoding gives the same program as the reference encoder. Decoding parses the program (without running it), whatever its |
| 11 | + whitespaces, and returns the code. Malformed programs are reported whatever the errors handling. |
| 12 | +
|
| 13 | +This codec: |
| 14 | +- en/decodes strings from str to str |
| 15 | +- en/decodes strings from bytes to bytes |
| 16 | +- decodes file content to str (read) |
| 17 | +- encodes file content from str to bytes (write) |
| 18 | +
|
| 19 | +Reference: https://utf-8.jp/public/aaencode.html |
| 20 | +""" |
| 21 | +from ._javascript import * |
| 22 | +from ..__common__ import * |
| 23 | + |
| 24 | + |
| 25 | +__examples__ = { |
| 26 | + 'enc(aaencode|aa_encode)': { |
| 27 | + 'alert(1)': "ﾟωﾟﾉ= /｀ｍ´）ﾉ ~┻━┻ //*´∇｀*/ ['_']; o=(ﾟｰﾟ) =_=3; c=(ﾟΘﾟ) =(ﾟｰﾟ)-(ﾟｰﾟ); (ﾟДﾟ) =(ﾟΘﾟ)= (o^_^o)/ (o" |
| 28 | + "^_^o);(ﾟДﾟ)={ﾟΘﾟ: '_' ,ﾟωﾟﾉ : ((ﾟωﾟﾉ==3) +'_') [ﾟΘﾟ] ,ﾟｰﾟﾉ :(ﾟωﾟﾉ+ '_')[o^_^o -(ﾟΘﾟ)] ,ﾟДﾟﾉ:((ﾟｰﾟ=" |
| 29 | + "=3) +'_')[ﾟｰﾟ] }; (ﾟДﾟ) [ﾟΘﾟ] =((ﾟωﾟﾉ==3) +'_') [c^_^o];(ﾟДﾟ) ['c'] = ((ﾟДﾟ)+'_') [ (ﾟｰﾟ)+(ﾟｰﾟ)-(ﾟ" |
| 30 | + "Θﾟ) ];(ﾟДﾟ) ['o'] = ((ﾟДﾟ)+'_') [ﾟΘﾟ];(ﾟoﾟ)=(ﾟДﾟ) ['c']+(ﾟДﾟ) ['o']+(ﾟωﾟﾉ +'_')[ﾟΘﾟ]+ ((ﾟωﾟﾉ==3) +" |
| 31 | + "'_') [ﾟｰﾟ] + ((ﾟДﾟ) +'_') [(ﾟｰﾟ)+(ﾟｰﾟ)]+ ((ﾟｰﾟ==3) +'_') [ﾟΘﾟ]+((ﾟｰﾟ==3) +'_') [(ﾟｰﾟ) - (ﾟΘﾟ)]+(ﾟД" |
| 32 | + "ﾟ) ['c']+((ﾟДﾟ)+'_') [(ﾟｰﾟ)+(ﾟｰﾟ)]+ (ﾟДﾟ) ['o']+((ﾟｰﾟ==3) +'_') [ﾟΘﾟ];(ﾟДﾟ) ['_'] =(o^_^o) [ﾟoﾟ] [" |
| 33 | + "ﾟoﾟ];(ﾟεﾟ)=((ﾟｰﾟ==3) +'_') [ﾟΘﾟ]+ (ﾟДﾟ) .ﾟДﾟﾉ+((ﾟДﾟ)+'_') [(ﾟｰﾟ) + (ﾟｰﾟ)]+((ﾟｰﾟ==3) +'_') [o^_^o -" |
| 34 | + "ﾟΘﾟ]+((ﾟｰﾟ==3) +'_') [ﾟΘﾟ]+ (ﾟωﾟﾉ +'_') [ﾟΘﾟ]; (ﾟｰﾟ)+=(ﾟΘﾟ); (ﾟДﾟ)[ﾟεﾟ]='\\\\'; (ﾟДﾟ).ﾟΘﾟﾉ=(ﾟДﾟ+ ﾟ" |
| 35 | + "ｰﾟ)[o^_^o -(ﾟΘﾟ)];(oﾟｰﾟo)=(ﾟωﾟﾉ +'_')[c^_^o];(ﾟДﾟ) [ﾟoﾟ]='\\\"';(ﾟДﾟ) ['_'] ( (ﾟДﾟ) ['_'] (ﾟεﾟ+(ﾟД" |
| 36 | + "ﾟ)[ﾟoﾟ]+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ (ﾟｰﾟ)+ (ﾟΘﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ (ﾟｰﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ" |
| 37 | + ")+ (ﾟｰﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((o^_^o) +(o^_^o))+ ((o^_^o) - (ﾟΘﾟ))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘ" |
| 38 | + "ﾟ)+ ((o^_^o) +(o^_^o))+ (ﾟｰﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+((ﾟｰﾟ) + (ﾟΘﾟ))+ (c^_^o)+ (ﾟДﾟ)[ﾟεﾟ]+((o^_^o) +(o^_^o))+" |
| 39 | + " (ﾟΘﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+((ﾟｰﾟ) + (ﾟΘﾟ))+ (ﾟΘﾟ)+ (ﾟДﾟ)[ﾟoﾟ]) (ﾟΘﾟ)) ('_');", |
| 40 | + }, |
| 41 | + 'enc-dec(aaencode)': ["", "alert(\"Hello, World!\")", "@random{256}", "caf\xe9 \u20ac \U0001f600", |
| 42 | + "\x00\x01\n\\\"'"], |
| 43 | + 'dec(aaencode)': {'': None, 'alert(1)': None}, |
| 44 | +} |
| 45 | + |
| 46 | + |
| 47 | +DIGITS = ["(c^_^o)", "(ﾟΘﾟ)", "((o^_^o) - (ﾟΘﾟ))", "(o^_^o)", "(ﾟｰﾟ)", "((ﾟｰﾟ) + (ﾟΘﾟ))", "((o^_^o) +(o^_^o))", |
| 48 | + "((ﾟｰﾟ) + (o^_^o))", "((ﾟｰﾟ) + (ﾟｰﾟ))", "((ﾟｰﾟ) + (ﾟｰﾟ) + (ﾟΘﾟ))", "(ﾟДﾟ) .ﾟωﾟﾉ", "(ﾟДﾟ) .ﾟΘﾟﾉ", |
| 49 | + "(ﾟДﾟ) ['c']", "(ﾟДﾟ) .ﾟｰﾟﾉ", "(ﾟДﾟ) .ﾟДﾟﾉ", "(ﾟДﾟ) [ﾟΘﾟ]"] |
| 50 | +HEADER = "ﾟωﾟﾉ= /｀ｍ´）ﾉ ~┻━┻ //*´∇｀*/ ['_']; o=(ﾟｰﾟ) =_=3; c=(ﾟΘﾟ) =(ﾟｰﾟ)-(ﾟｰﾟ); " |
| 51 | +# easter egg of the reference encoder |
| 52 | +EASTER_EGG = (re.compile(r"ひだまりスケッチ×(365|３５６)\s*来週も見てくださいね[!！]"), |
| 53 | + "X=_=3; \r\n\r\n X / _ / X < \"来週も見てくださいね!\";\r\n\r\n") |
| 54 | +PROLOGUE = "(ﾟДﾟ) =(ﾟΘﾟ)= (o^_^o)/ (o^_^o);(ﾟДﾟ)={ﾟΘﾟ: '_' ,ﾟωﾟﾉ : ((ﾟωﾟﾉ==3) +'_') [ﾟΘﾟ] ,ﾟｰﾟﾉ :(ﾟωﾟﾉ+ '_')" \ |
| 55 | + "[o^_^o -(ﾟΘﾟ)] ,ﾟДﾟﾉ:((ﾟｰﾟ==3) +'_')[ﾟｰﾟ] }; (ﾟДﾟ) [ﾟΘﾟ] =((ﾟωﾟﾉ==3) +'_') [c^_^o];(ﾟДﾟ) ['c'] = " \ |
| 56 | + "((ﾟДﾟ)+'_') [ (ﾟｰﾟ)+(ﾟｰﾟ)-(ﾟΘﾟ) ];(ﾟДﾟ) ['o'] = ((ﾟДﾟ)+'_') [ﾟΘﾟ];(ﾟoﾟ)=(ﾟДﾟ) ['c']+(ﾟДﾟ) ['o']+" \ |
| 57 | + "(ﾟωﾟﾉ +'_')[ﾟΘﾟ]+ ((ﾟωﾟﾉ==3) +'_') [ﾟｰﾟ] + ((ﾟДﾟ) +'_') [(ﾟｰﾟ)+(ﾟｰﾟ)]+ ((ﾟｰﾟ==3) +'_') [ﾟΘﾟ]+" \ |
| 58 | + "((ﾟｰﾟ==3) +'_') [(ﾟｰﾟ) - (ﾟΘﾟ)]+(ﾟДﾟ) ['c']+((ﾟДﾟ)+'_') [(ﾟｰﾟ)+(ﾟｰﾟ)]+ (ﾟДﾟ) ['o']+" \ |
| 59 | + "((ﾟｰﾟ==3) +'_') [ﾟΘﾟ];(ﾟДﾟ) ['_'] =(o^_^o) [ﾟoﾟ] [ﾟoﾟ];(ﾟεﾟ)=((ﾟｰﾟ==3) +'_') [ﾟΘﾟ]+ (ﾟДﾟ) .ﾟДﾟﾉ+" \ |
| 60 | + "((ﾟДﾟ)+'_') [(ﾟｰﾟ) + (ﾟｰﾟ)]+((ﾟｰﾟ==3) +'_') [o^_^o -ﾟΘﾟ]+((ﾟｰﾟ==3) +'_') [ﾟΘﾟ]+ (ﾟωﾟﾉ +'_') [ﾟΘﾟ]; " \ |
| 61 | + "(ﾟｰﾟ)+=(ﾟΘﾟ); (ﾟДﾟ)[ﾟεﾟ]='\\\\'; (ﾟДﾟ).ﾟΘﾟﾉ=(ﾟДﾟ+ ﾟｰﾟ)[o^_^o -(ﾟΘﾟ)];(oﾟｰﾟo)=(ﾟωﾟﾉ +'_')[c^_^o];" \ |
| 62 | + "(ﾟДﾟ) [ﾟoﾟ]='\\\"';" |
| 63 | +# Function(Function("return\"" + <escaped code> + "\"")(1))("_") |
| 64 | +START = "(ﾟДﾟ) ['_'] ( (ﾟДﾟ) ['_'] (ﾟεﾟ+(ﾟДﾟ)[ﾟoﾟ]+ " |
| 65 | +BACKSLASH, QUOTE, U = "(ﾟДﾟ)[ﾟεﾟ]+", "(ﾟДﾟ)[ﾟoﾟ]", "(oﾟｰﾟo)+ " |
| 66 | +EPILOGUE = QUOTE + ") (ﾟΘﾟ)) ('_');" |
| 67 | +# for decoding, whitespaces are removed from the program and from its tokens |
| 68 | +_ws = lambda s: re.sub(r"\s+", "", s) |
| 69 | +_START, _END = _ws(START), _ws(EPILOGUE).rstrip(";") |
| 70 | +_TOKENS = {_ws(BACKSLASH): "\\", _ws(U): "u", **{_ws(d) + "+": "0123456789abcdef"[i] for i, d in enumerate(DIGITS)}} |
| 71 | +_TOKEN = re.compile("|".join(map(re.escape, sorted(_TOKENS, key=len, reverse=True)))) |
| 72 | + |
| 73 | + |
| 74 | +def _err(msg): |
| 75 | + raise AaencodeDecodeError(f"'aaencode' codec can't decode: {msg}") |
| 76 | + |
| 77 | + |
| 78 | +def aaencode_encode(text, errors="strict"): |
| 79 | + t = ensure_str(text) |
| 80 | + r = HEADER + [EASTER_EGG[1], ""][EASTER_EGG[0].search(t) is None] + PROLOGUE + START |
| 81 | + for n in utf16_units(t): |
| 82 | + r += BACKSLASH + ("".join(DIGITS[int(c)] + "+ " for c in f"{n:o}") if n <= 127 else |
| 83 | + U + "".join(DIGITS[int(c, 16)] + "+ " for c in f"{n:04x}")) |
| 84 | + return r + EPILOGUE, len(text) |
| 85 | + |
| 86 | + |
| 87 | +def aaencode_decode(text, errors="strict"): |
| 88 | + p = _ws(ensure_str(text)) |
| 89 | + if (i := p.find(_START)) < 0: |
| 90 | + _err("payload not found") |
| 91 | + p = p[i+len(_START):].rstrip(";") |
| 92 | + if not p.endswith(_END): |
| 93 | + _err("end of payload not found") |
| 94 | + p, body, i = p[:-len(_END)], "", 0 |
| 95 | + # the payload is the source of a string literal, made of backslashes, "u"'s and hexadecimal digits |
| 96 | + while i < len(p): |
| 97 | + if (m := _TOKEN.match(p, i)) is None: |
| 98 | + _err(f"unexpected token at position {i} of the payload") |
| 99 | + body, i = body + _TOKENS[m.group()], m.end() |
| 100 | + return (r := js_unescape(body, _err)), len(r) |
| 101 | + |
| 102 | + |
| 103 | +add("aaencode", aaencode_encode, aaencode_decode, r"^aa[-_]?encode$", expansion_factor=None) |
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