Created
October 2, 2018 03:10
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brute force attempt
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| chars='abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890,./<>?`~!@#$'.split('') | |
| var re1 = new RegExp("^([\u4E00-\uFA29]|[\uE7C7-\uE7F3]|[a-zA-Z0-9])*$"); | |
| function p(prefix, depth) { if (depth == 0) { cb(prefix); return; } for (var i = 0 ; i < chars.length; i++) { p(prefix + chars[i], depth - 1); } } | |
| function cb(dec_pwd) { | |
| var cipher_bytes = aesjs.utils.hex.toBytes(params["cipher_hex"]); | |
| var iv_bytes = aesjs.utils.hex.toBytes(params["iv_hex"]); | |
| var dec_key = hash256(aesjs.utils.utf8.toBytes(dec_pwd) + iv_bytes); | |
| var aesCbc = new aesjs.ModeOfOperation.cbc(dec_key, iv_bytes); | |
| var decrypted_bytes = aesCbc.decrypt(cipher_bytes); | |
| var plain_text = block_dec(decrypted_bytes); | |
| if (plain_text.match(re1) != null && utf8ByteCount(plain_text) != null && plain_text.length > 3) { console.log('!!! ' + dec_pwd + ' -> ' + plain_text); } | |
| } | |
| function utf8Len(codePoint) { | |
| if(codePoint >= 0xD800 && codePoint <= 0xDFFF) | |
| return null; | |
| if(codePoint < 0) return null; | |
| if(codePoint <= 0x7F) return 1; | |
| if(codePoint <= 0x7FF) return 2; | |
| if(codePoint <= 0xFFFF) return 3; | |
| if(codePoint <= 0x1FFFFF) return 4; | |
| if(codePoint <= 0x3FFFFFF) return 5; | |
| if(codePoint <= 0x7FFFFFFF) return 6; | |
| return null; | |
| } | |
| function isHighSurrogate(codeUnit) { | |
| return codeUnit >= 0xD800 && codeUnit <= 0xDBFF; | |
| } | |
| function isLowSurrogate(codeUnit) { | |
| return codeUnit >= 0xDC00 && codeUnit <= 0xDFFF; | |
| } | |
| /** | |
| * Transforms UTF-16 surrogate pairs to a code point. | |
| * See RFC2781 | |
| */ | |
| function toCodepoint(highCodeUnit, lowCodeUnit) { | |
| if(!isHighSurrogate(highCodeUnit)) return null; | |
| if(!isLowSurrogate(lowCodeUnit)) return null; | |
| highCodeUnit = (0x3FF & highCodeUnit) << 10; | |
| var u = highCodeUnit | (0x3FF & lowCodeUnit); | |
| return u + 0x10000; | |
| } | |
| /** | |
| * Counts the length in bytes of a string when encoded as UTF-8. | |
| * str - a string | |
| * return - the length as an integer | |
| */ | |
| function utf8ByteCount(str) { | |
| var count = 0; | |
| for(var i=0; i<str.length; i++) { | |
| var ch = str.charCodeAt(i); | |
| h=isHighSurrogate(ch); if(h==null) return null; if (h) { | |
| var high = ch; | |
| var low = str.charCodeAt(++i); | |
| l = utf8Len(toCodepoint(high, low)); if (l==null) return null; count += l; | |
| } else { | |
| l = utf8Len(ch); if (l==null) return null; count += l; | |
| } | |
| } | |
| return count; | |
| } |
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