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Google CTF's JS SAFE 4.0 attachment
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>JS safe v4 - the leading localStorage based safe solution with amazing JS anti-debug technology</title> | |
| <!-- | |
| Advertisement: | |
| Looking for a hand-crafted, browser based virtual safe to store your most | |
| interesting secrets? Look no further, you have found it. You can order your own | |
| by sending a mail to js_safe@example.com. When ordering, please specify the | |
| password you'd like to use to open and close the safe. We'll hand craft a | |
| unique safe just for you, that only works with your password of choice. | |
| WARNING: Do NOT modify your HTML once downloaded. Otherwise, it'll stop working | |
| (it'll not accept the correct password) and might compromise your stored data. | |
| --> | |
| <style> | |
| body { | |
| flex-direction: column; | |
| } | |
| input { | |
| font-size: 200%; | |
| margin-top: 2em; | |
| text-align: center; | |
| width: 17em; | |
| } | |
| #result { | |
| font-size: 300%; | |
| font-family: monospace; | |
| font-weight: bold; | |
| } | |
| body.granted>#result::before { | |
| content: "Access Granted"; | |
| color: green; | |
| } | |
| body.denied>#result::before { | |
| content: "Access Denied"; | |
| color: red; | |
| } | |
| #content { | |
| display: none; | |
| } | |
| body.granted #content { | |
| display: initial; | |
| } | |
| /* | |
| Source and license of the animated box CSS and HTML code (copied without change): | |
| Blog post: https://dev.to/johnnyfekete/3d-christmas-gift-box-with-html-css-1kkl | |
| Copyright (c) 2022 by Johnny Fekete (https://codepen.io/johnnyfekete/pen/NWRxmwG) | |
| Permission is hereby granted, free of charge, to any person obtaining a copy of | |
| this software and associated documentation files (the "Software"), to deal in | |
| the Software without restriction, including without limitation the rights to | |
| use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies | |
| of the Software, and to permit persons to whom the Software is furnished to do | |
| so, subject to the following conditions: | |
| The above copyright notice and this permission notice shall be included in all | |
| copies or substantial portions of the Software. | |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
| SOFTWARE. | |
| */ | |
| body { | |
| background: linear-gradient(-20deg, #a8dadc 20%, #457b9d 20%, #457b9d 30%, #1d3557 30%, #1d3557 70%, #457b9d 70%, #457b9d 80%, #a8dadc 80% ); | |
| min-height: 100vh; | |
| display: flex; | |
| align-items: center; | |
| justify-content: center; | |
| flex-wrap: wrap; | |
| flex-direction: column; | |
| } | |
| .gift-box-container { | |
| width: 200px; | |
| height: 200px; | |
| perspective: 400px; | |
| } | |
| .gift-box { | |
| --gift-box-color: #e63946; | |
| --gift-box-edge-color: #590b11; | |
| --wrap-color: #f1faee; | |
| --wrap-ribbon-color: #c0e4e6; | |
| --wrap-top-color: #d8efef; | |
| width: 200px; | |
| height: 200px; | |
| position: relative; | |
| transform-style: preserve-3d; | |
| transition: transform 1s; | |
| -webkit-animation: rotation-3d 20s infinite linear; | |
| animation: rotation-3d 20s infinite linear; | |
| } | |
| .gift-box .gift-box__side, | |
| .gift-box .gift-box__end { | |
| position: absolute; | |
| width: 200px; | |
| height: 200px; | |
| border: 2px solid var(--gift-box-edge-color); | |
| } | |
| .gift-box .gift-box-lid__side { | |
| position: absolute; | |
| width: 220px; | |
| height: 50px; | |
| border: 2px solid var(--gift-box-edge-color); | |
| } | |
| .gift-box .gift-box-lid__end { | |
| position: absolute; | |
| width: 220px; | |
| height: 220px; | |
| border: 2px solid var(--gift-box-edge-color); | |
| } | |
| .gift-box .gift-box__side, | |
| .gift-box .gift-box-lid__side { | |
| background: linear-gradient(to right, | |
| var(--gift-box-color) 40%, | |
| var(--wrap-color) 40%, | |
| var(--wrap-color) 60%, | |
| var(--gift-box-color) 60% | |
| ); | |
| } | |
| .gift-box .gift-box__end, | |
| .gift-box .gift-box-lid__end { | |
| background: linear-gradient(to right, | |
| transparent 40%, | |
| var(--wrap-top-color) 40%, | |
| var(--wrap-top-color) 60%, | |
| transparent 60% | |
| ), | |
| linear-gradient(to bottom, | |
| var(--gift-box-color) 40%, | |
| var(--wrap-color) 40%, | |
| var(--wrap-color) 60%, | |
| var(--gift-box-color) 60% | |
| ); | |
| } | |
| .gift-box .gift-box__side--front { transform: rotateY(0deg) translateZ(100px); } | |
| .gift-box .gift-box__side--back { transform: rotateY(180deg) translateZ(100px); } | |
| .gift-box .gift-box__side--left { transform: rotateY(-90deg) translateZ(100px); } | |
| .gift-box .gift-box__side--right { transform: rotateY(90deg) translateZ(100px); } | |
| .gift-box .gift-box__side--top { transform: rotateX(90deg) translateZ(100px); } | |
| .gift-box .gift-box__side--bottom { transform: rotateX(-90deg) translateZ(100px); } | |
| .gift-box .gift-box-lid__side--front { transform: rotateY(0deg) translateZ(110px) translateX(-10px) translateY(-10px); } | |
| .gift-box .gift-box-lid__side--back { transform: rotateY(180deg) translateZ(110px) translateX(10px) translateY(-10px); } | |
| .gift-box .gift-box-lid__side--left { transform: rotateY(-90deg) translateZ(120px) translateY(-10px); } | |
| .gift-box .gift-box-lid__side--right { transform: rotateY(90deg) translateZ(100px) translateY(-10px); } | |
| .gift-box .gift-box-lid__side--top { transform: rotateX(90deg) translateZ(120px) translateX(-10px) translateY(0); } | |
| .gift-box .ribbon-l { | |
| position: absolute; | |
| width: 70px; | |
| height: 70px; | |
| border: 2px solid var(--wrap-ribbon-color); | |
| border-radius: 50% 50% 0 50%; | |
| transform-style: preserve-3d; | |
| transform-origin: 50% 50%; | |
| transform: rotateX(75deg) | |
| rotateY(90deg) | |
| /* use a CSS variable for the translate, defined in CSS */ | |
| translateZ(calc(80px - var(--gift-box-position))) | |
| translateX(-85px) | |
| translateY(-75px) | |
| skewY(30deg); | |
| } | |
| .gift-box .ribbon-r { | |
| position: absolute; | |
| width: 70px; | |
| height: 70px; | |
| border: 2px solid var(--wrap-ribbon-color); | |
| border-radius: 50% 50% 0 50%; | |
| transform-style: preserve-3d; | |
| transform-origin: 50% 50%; | |
| transform: rotateX(-5deg) | |
| rotateY(90deg) | |
| /* use a CSS variable for the translate, defined in CSS */ | |
| translateZ(calc(80px - var(--gift-box-position))) | |
| translateX(-30px) | |
| translateY(-110px) | |
| skewY(30deg); | |
| } | |
| .ribbon-l-end { | |
| position: absolute; | |
| width: 40px; | |
| height: 110px; | |
| background: | |
| linear-gradient(45deg, var(--wrap-top-color) 72%, transparent 72%), | |
| linear-gradient(-45deg, var(--wrap-top-color) 72%, transparent 72%); | |
| border: 2px solid var(--gift-box-edge-color); | |
| border-top: none; | |
| border-bottom: none; | |
| transform: rotateX(-70deg) translateX(80px) translateY(-80px) translateZ(-60px); | |
| } | |
| .ribbon-r-end { | |
| position: absolute; | |
| width: 40px; | |
| height: 110px; | |
| background: | |
| linear-gradient(45deg, var(--wrap-top-color) 72%, transparent 72%), | |
| linear-gradient(-45deg, var(--wrap-top-color) 72%, transparent 72%); | |
| border: 2px solid var(--gift-box-edge-color); | |
| border-top: none; | |
| border-bottom: none; | |
| transform: rotateX(80deg) translateX(80px) translateY(-80px) translateZ(60px); | |
| } | |
| @-webkit-keyframes rotation-3d { | |
| from { | |
| transform: translateZ(-100px) rotateY(50deg) rotateX(-5deg) rotateZ(-30deg) | |
| } | |
| to { | |
| transform: translateZ(-100px) rotateY(409deg) rotateX(-5deg) rotateZ(-30deg) | |
| } | |
| } | |
| @keyframes rotation-3d { | |
| from { | |
| transform: translateZ(-100px) rotateY(50deg) rotateX(-5deg) rotateZ(-30deg) | |
| } | |
| to { | |
| transform: translateZ(-100px) rotateY(409deg) rotateX(-5deg) rotateZ(-30deg) | |
| } | |
| } | |
| </style> | |
| <script> | |
| // Prevent setting breakpoints from the dev console UI directly by defining the function as string | |
| var code = `\x60 | |
| console.log({flag}); | |
| for (i=0; i<100; i++) setTimeout('debugger'); | |
| if ("\x24\x7B\x22 .? K 7 hA [Cdml<U}9P @dBpM) -$A%!X5[ '% U(!_ (]c 4zp$RpUi(mv!u4!D%i%6!D'Af$Iu8HuCP>qH.*(Nex.)X&{I'$ ~Y0mDPL1 U08<2G{ ~ _:h\ys! K A( f.'0 p!s fD] ( H E < 9Gf.' XH,V1 P * -P\x22\x7D" != ("\x24\x7B\x22" + checksum(code) + "\x22\x7D")) while(1); | |
| flag = flag.split(''); | |
| i = 1337; | |
| pool = 'c_3L9zKw_l1HusWN_b_U0c3d5_1'.split(''); | |
| while (pool.length > 0) if(flag.shift() != pool.splice((i = (i || 1) * 16807 % 2147483647)%pool.length, 1)[0]) return false; | |
| return true; | |
| \x60`; | |
| setTimeout("x = Function('flag', " + code + ")"); | |
| // Check password and decode encrypted data from localstorage | |
| function open_safe() { | |
| keyhole.disabled = true; | |
| password = /^CTF{([0-9a-zA-Z_@!?-]+)}$/.exec(keyhole.value); | |
| document.body.className = (password && x(password[1])) ? 'granted' : 'denied'; | |
| if (document.body.className == 'denied') return; | |
| password = Array.from(password[1]).map(c => c.charCodeAt()); | |
| encrypted = JSON.parse(localStorage.content || ''); | |
| content.value = encrypted.map((c,i) => c ^ password[i % password.length]).map(String.fromCharCode).join('') | |
| } | |
| // Encrypt and save data | |
| function save() { | |
| plaintext = Array.from(content.value).map(c => c.charCodeAt()); | |
| localStorage.content = JSON.stringify(plaintext.map((c,i) => c ^ password[i % password.length])); | |
| } | |
| </script> | |
| </head> | |
| <body onload="console.log({status:'loaded'})"> | |
| <div class="gift-box-container"> | |
| <div class="gift-box"> | |
| <div class="gift-box__side gift-box__side--front"></div> | |
| <div class="gift-box__side gift-box__side--back"></div> | |
| <div class="gift-box__side gift-box__side--left"></div> | |
| <div class="gift-box__side gift-box__side--right"></div> | |
| <div class="gift-box__end gift-box__side--top"></div> | |
| <div class="gift-box__end gift-box__side--bottom"></div> | |
| <div class="gift-box-lid__side gift-box-lid__side--front"></div> | |
| <div class="gift-box-lid__side gift-box-lid__side--back"></div> | |
| <div class="gift-box-lid__side gift-box-lid__side--left"></div> | |
| <div class="gift-box-lid__side gift-box-lid__side--right"></div> | |
| <div class="gift-box-lid__end gift-box-lid__side--top"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 0px; border-color: var(--gift-box-edge-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 1px; border-color: var(--gift-box-edge-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 2px; border-color: var(--gift-box-edge-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 3px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 4px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 5px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 6px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 7px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 8px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 9px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 10px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 11px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 12px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 13px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 14px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 15px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 16px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 17px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 18px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 19px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 20px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 21px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 22px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 23px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 24px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 25px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 26px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 27px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 28px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 29px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 30px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 31px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 32px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 33px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 34px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 35px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 36px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 37px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 38px; border-color: var(--gift-box-edge-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 39px; border-color: var(--gift-box-edge-color)"></div> | |
| <div class="ribbon-l" style="--gift-box-position: 40px; border-color: var(--gift-box-edge-color)"></div> | |
| <div class="ribbon-l-end"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 0px; border-color: var(--gift-box-edge-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 1px; border-color: var(--gift-box-edge-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 2px; border-color: var(--gift-box-edge-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 3px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 4px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 5px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 6px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 7px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 8px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 9px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 10px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 11px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 12px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 13px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 14px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 15px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 16px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 17px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 18px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 19px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 20px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 21px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 22px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 23px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 24px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 25px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 26px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 27px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 28px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 29px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 30px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 31px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 32px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 33px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 34px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 35px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 36px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 37px; border-color: var(--wrap-ribbon-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 38px; border-color: var(--gift-box-edge-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 39px; border-color: var(--gift-box-edge-color)"></div> | |
| <div class="ribbon-r" style="--gift-box-position: 40px; border-color: var(--gift-box-edge-color)"></div> | |
| <div class="ribbon-r-end"></div> | |
| </div> | |
| </div> | |
| <div> | |
| <input id="keyhole" autofocus onchange="open_safe()" placeholder="🔑"> | |
| </div> | |
| <div id="result"> | |
| </div> | |
| <div> | |
| <input id="content" onchange="save()"> | |
| </div> | |
| <script> | |
| // Utilities | |
| // Proprietary military grade checksum function (to use on objects, stringify argument first, e.g. object + ' ') | |
| checksum = s => { | |
| let result = ''; | |
| let x = 0; | |
| try { | |
| for (let x = 0; x+3 <= s.length; x+=3) { | |
| let next = | |
| (s.charCodeAt(x)%2)*64 + | |
| (s.charCodeAt(x+1)%8)*8 + | |
| s.charCodeAt(x+2)%8; | |
| next = Math.min(Math.max(0x20, next), 0x7E); | |
| result += String.fromCharCode(next); | |
| } | |
| return result; | |
| } catch(_) { | |
| throw ChecksumError(s, result, x); | |
| } | |
| } | |
| console.log("checksum test", checksum(checksum + ' ')); | |
| // TODO: Whole document integrity check: if (document.documentElement.outerHTML.length == 23082) //... | |
| // TODO: Utility function for detecting the opening of DevTools, https://stackoverflow.com/q/7798748 | |
| // TODO: Create wrapper function to support async/await for setTimeout | |
| // E.g. something like https://stackoverflow.com/q/33289726 | |
| // TODO: Checksum check for the utility funcitons themselves, e.g. (checksum(' ' + checksum)) == '...' | |
| // splice for Object (generalization of Array.prototype.splice) | |
| function splice(start, deleteCount, insert) { | |
| ret = {}; | |
| // Need to iterate backwards to avoid indexing problems around deleted properties | |
| for (i = deleteCount; i != 0; i--) key = Object.keys(this)[start+i-1], ret[key] = this[key], delete this[key]; | |
| for (key in insert) this[key] = insert[key]; | |
| return ret; | |
| } | |
| var a = {a:1, b:2, c:3}; console.log('splice test', JSON.stringify({returnValue: splice.call(a, 0, 2, {a:5, b:6}), updatedObject: a})); | |
| Object.defineProperty(Object.prototype, 'splice', {get:splice}); | |
| // More intuitive trace printer for Chrome | |
| Error.prepareStackTrace = (error, stack) => { | |
| var i = stack.length - 1, t = []; | |
| do t.push('Frame ' + i + ': ' + stack[i]); while(i--); | |
| return t.join('\n'); | |
| }; | |
| console.log('stack trace test', new Error()); | |
| // Print the intermediate input and output state of an interrupted checksum process | |
| function ChecksumError(input, result, x) { | |
| return Object.defineProperties(Object.assign(new Error, {input, result, x, toString: undefined}), { | |
| message: {get: () => { | |
| let message = []; | |
| for (var i = 0; !(i > this.x); i+=3) message.push([i, input[i], input[i+1], input[i+2], result[i/3]]); | |
| return JSON.stringify(message); | |
| }} | |
| }); | |
| } | |
| console.log('ChecksumError test', ChecksumError('input', 'ou', 4)); | |
| </script> | |
| </body> | |
| </html> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>JS safe v4 - the leading localStorage based safe solution with amazing JS anti-debug technology</title> | |
| <style> | |
| body { | |
| flex-direction: column; | |
| } | |
| input { | |
| font-size: 200%; | |
| margin-top: 2em; | |
| text-align: center; | |
| width: 17em; | |
| } | |
| #result { | |
| font-size: 300%; | |
| font-family: monospace; | |
| font-weight: bold; | |
| } | |
| body.granted>#result::before { | |
| content: "Access Granted"; | |
| color: green; | |
| } | |
| body.denied>#result::before { | |
| content: "Access Denied"; | |
| color: red; | |
| } | |
| #content { | |
| display: none; | |
| } | |
| body.granted #content { | |
| display: initial; | |
| } | |
| </style> | |
| <script> | |
| // // Prevent setting breakpoints from the dev console UI directly by defining the function as string | |
| // var code = `\x60 | |
| // console.log({flag}); | |
| // for (i=0; i<100; i++) setTimeout('debugger'); | |
| // if ("\x24\x7B\x22 .? K 7 hA [Cdml<U}9P @dBpM) -$A%!X5[ '% U(!_ (]c 4zp$RpUi(mv!u4!D%i%6!D'Af$Iu8HuCP>qH.*(Nex.)X&{I'$ ~Y0mDPL1 U08<2G{ ~ _:h\ys! K A( f.'0 p!s fD] ( H E < 9Gf.' XH,V1 P * -P\x22\x7D" != ("\x24\x7B\x22" + checksum(code) + "\x22\x7D")) while(1); | |
| // flag = flag.split(''); | |
| // i = 1337; | |
| // pool = 'c_3L9zKw_l1HusWN_b_U0c3d5_1'.split(''); | |
| // while (pool.length > 0) if(flag.shift() != pool.splice((i = (i || 1) * 16807 % 2147483647)%pool.length, 1)[0]) return false; | |
| // return true; | |
| // \x60`; | |
| // setTimeout("x = Function('flag', " + code + ")"); | |
| x = flag => { | |
| console.log({ flag }); | |
| // for (i = 0; i < 100; i++) /*setTimeout("debugger")*/; | |
| // if ( | |
| // (" .? K 7 hA [Cdml<U}9P @dBpM) -$A%!X5[ '% U(!_ (]c 4zp$RpUi(mv!u4!D%i%6!D'Af$Iu8HuCP>qH.*(Nex.)X&{I'$ ~Y0mDPL1 U08<2G{ ~ _:hys! K A( f.'0 p!s fD] ( H E < 9Gf.' XH,V1 P * -P" != | |
| // " .? K 7 hA [Cdml<U}9P 8 @@di ", | |
| // (i += (724 + 12513) | 1), | |
| // !"X HA 8 @ ( D 7 1 @# C+]CeC QG AZ (!s! K hA_P `G{ ~ _:hys! K A( f.`0 p!s fD] ( H E < 9Gf.` XH,V1 P * -P") | |
| // ) | |
| // while (1); | |
| // i += (724 + 12513) | 1 | |
| i = 13337 | |
| flag = flag.split(""); | |
| // i = 1337; | |
| pool = "c_3L9zKw_l1HusWN_b_U0c3d5_1".split(""); | |
| while (pool.length > 0) { | |
| const next = flag.shift() | |
| i = ((i || 1) * 16807) % 2147483647; | |
| const removed = pool.splice(i % pool.length, 1)[0] | |
| if (next != removed) | |
| return false; | |
| } | |
| return true; | |
| } | |
| // Check password and decode encrypted data from localstorage | |
| function open_safe() { | |
| keyhole.disabled = true; | |
| password = /^CTF{([0-9a-zA-Z_@!?-]+)}$/.exec(keyhole.value); | |
| document.body.className = password && x(password[1]) ? "granted" : "denied"; | |
| if (document.body.className == "denied") return; | |
| password = Array.from(password[1]).map((c) => c.charCodeAt()); | |
| encrypted = JSON.parse(localStorage.content || ""); | |
| content.value = encrypted | |
| .map((c, i) => c ^ password[i % password.length]) | |
| .map(String.fromCharCode) | |
| .join(""); | |
| } | |
| // Encrypt and save data | |
| function save() { | |
| plaintext = Array.from(content.value).map((c) => c.charCodeAt()); | |
| localStorage.content = JSON.stringify( | |
| plaintext.map((c, i) => c ^ password[i % password.length]) | |
| ); | |
| } | |
| </script> | |
| </head> | |
| <body onload="console.log({status:'loaded'})"> | |
| <div> | |
| <input id="keyhole" autofocus onchange="open_safe()" placeholder="🔑"> | |
| </div> | |
| <div id="result"> | |
| </div> | |
| <div> | |
| <input id="content" onchange="save()"> | |
| </div> | |
| <script> | |
| // Utilities | |
| // Proprietary military grade checksum function (to use on objects, stringify argument first, e.g. object + ' ') | |
| checksum = (s) => { | |
| let result = ""; | |
| let x = 0; | |
| try { | |
| for (let x = 0; x + 3 <= s.length; x += 3) { | |
| let next = | |
| (s.charCodeAt(x) % 2) * 64 + | |
| (s.charCodeAt(x + 1) % 8) * 8 + | |
| (s.charCodeAt(x + 2) % 8); | |
| next = Math.min(Math.max(0x20, next), 0x7e); | |
| result += String.fromCharCode(next); | |
| } | |
| return result; | |
| } catch (error) { | |
| console.warn(error) | |
| throw ChecksumError(s, result, x); | |
| } | |
| }; | |
| const checksumStr = `s => { \u{2001}\u{2000}\u{2007}\u{2002}\u{2001}\u{2001}\u{2007}\u{2001}\u{2004}\u{2002}\u{2001}\u{2005}\u{2002}\u{2001}\u{2004}\u{2005}\u{2001}\u{2004}\u{2003}\u{2001}\u{2006}\u{2004}\u{2000}\u{2005}\u{2006}\u{2001}\u{2004}\u{2004}\u{2001}\u{2004}\u{2005}\u{2001}\u{2004}\u{2006}\u{2001}\u{2005}\u{2001}\u{2001}\u{2005}\u{2006}\u{2001}\u{2004}\u{2005}\u{2001}\u{2002}\u{2000}\u{2001}\u{2006}\u{2002}\u{2001}\u{2005}\u{2007}\u{2001}\u{2006}\u{2000}\u{2001}\u{2004}\u{2005}\u{2001}\u{2006}\u{2002}\u{2001}\u{2006}\u{2004}\u{2001}\u{2007}\u{2001}\u{2000}\u{2005}\u{2000}\u{2001}\u{2004}\u{2004}\u{2001}\u{2005}\u{2007}\u{2001}\u{2004}\u{2003}\u{2001}\u{2006}\u{2005}\u{2001}\u{2005}\u{2005}\u{2001}\u{2004}\u{2005}\u{2001}\u{2005}\u{2006}\u{2001}\u{2006}\u{2004}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2002} \n let result = '';\u{2000}\u{2005}\u{2002}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2006}\u{2001}\u{2004}\u{2002}\u{2001}\u{2005}\u{2007}\u{2001}\u{2004}\u{2004}\u{2001}\u{2007}\u{2001}\u{2000}\u{2005}\u{2004}\u{2000}\u{2004}\u{2007}\u{2001}\u{2004}\u{2003}\u{2001}\u{2005}\u{2004}\u{2001}\u{2004}\u{2001}\u{2001}\u{2006}\u{2003}\u{2001}\u{2006}\u{2003}\u{2001}\u{2001}\u{2006}\u{2001}\u{2004}\u{2001}\u{2001}\u{2005}\u{2005}\u{2001}\u{2004}\u{2005}\u{2000}\u{2004}\u{2007}\u{2000}\u{2005}\u{2004}\u{2001}\u{2007}\u{2003}\u{2001}\u{2004}\u{2007}\u{2001}\u{2004}\u{2005}\u{2001}\u{2006}\u{2004}\u{2000}\u{2005}\u{2000}\u{2000}\u{2005}\u{2001}\u{2001}\u{2007}\u{2003}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2002} \n let x = 0;\u{2000}\u{2005}\u{2002}\u{2000}\u{2005}\u{2007}\u{2001}\u{2006}\u{2002}\u{2001}\u{2004}\u{2005}\u{2001}\u{2006}\u{2004}\u{2001}\u{2006}\u{2005}\u{2001}\u{2006}\u{2002}\u{2001}\u{2005}\u{2006}\u{2000}\u{2004}\u{2000}\u{2001}\u{2006}\u{2004}\u{2001}\u{2005}\u{2000}\u{2001}\u{2005}\u{2001}\u{2001}\u{2006}\u{2003}\u{2000}\u{2005}\u{2006}\u{2001}\u{2004}\u{2007}\u{2001}\u{2004}\u{2005}\u{2001}\u{2006}\u{2004}\u{2001}\u{2000}\u{2001}\u{2001}\u{2006}\u{2004}\u{2001}\u{2006}\u{2004}\u{2001}\u{2006}\u{2002}\u{2001}\u{2005}\u{2001}\u{2001}\u{2004}\u{2002}\u{2001}\u{2006}\u{2005}\u{2001}\u{2006}\u{2004}\u{2001}\u{2004}\u{2005}\u{2000}\u{2005}\u{2000}\u{2000}\u{2004}\u{2007}\u{2001}\u{2004}\u{2003}\u{2001}\u{2005}\u{2004}\u{2001}\u{2004}\u{2001}\u{2001}\u{2006}\u{2003}\u{2001}\u{2006}\u{2003}\u{2000}\u{2004}\u{2007}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2002} \n try { \u{2000}\u{2005}\u{2002}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2001}\u{2001}\u{2007}\u{2004}\u{2001}\u{2007}\u{2004}\u{2000}\u{2004}\u{2007}\u{2000}\u{2004}\u{2007}\u{2001}\u{2007}\u{2005}\u{2000}\u{2005}\u{2004}\u{2001}\u{2006}\u{2003}\u{2001}\u{2004}\u{2005}\u{2001}\u{2006}\u{2004}\u{2000}\u{2005}\u{2000}\u{2001}\u{2007}\u{2000}\u{2000}\u{2005}\u{2001}\u{2001}\u{2007}\u{2003}\u{2001}\u{2006}\u{2004}\u{2001}\u{2005}\u{2000}\u{2001}\u{2005}\u{2001}\u{2001}\u{2006}\u{2003}\u{2000}\u{2005}\u{2006}\u{2001}\u{2006}\u{2003}\u{2001}\u{2004}\u{2005}\u{2001}\u{2006}\u{2004}\u{2001}\u{2000}\u{2001}\u{2001}\u{2006}\u{2004}\u{2001}\u{2006}\u{2004}\u{2001}\u{2006}\u{2002}\u{2001}\u{2005}\u{2001}\u{2001}\u{2004}\u{2002}\u{2001}\u{2006}\u{2005}\u{2001}\u{2006}\u{2004}\u{2001}\u{2004}\u{2005}\u{2000}\u{2005}\u{2000}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2002} \n for (let x = 0; x+3 <= s.length; x+=3) { \u{2000}\u{2005}\u{2002}\u{2000}\u{2005}\u{2007}\u{2000}\u{2004}\u{2007}\u{2001}\u{2004}\u{2003}\u{2001}\u{2005}\u{2004}\u{2001}\u{2004}\u{2001}\u{2001}\u{2006}\u{2003}\u{2001}\u{2006}\u{2003}\u{2000}\u{2004}\u{2007}\u{2000}\u{2005}\u{2004}\u{2000}\u{2005}\u{2000}\u{2001}\u{2007}\u{2000}\u{2000}\u{2004}\u{2001}\u{2000}\u{2007}\u{2005}\u{2000}\u{2004}\u{2007}\u{2001}\u{2004}\u{2007}\u{2001}\u{2006}\u{2002}\u{2001}\u{2004}\u{2001}\u{2001}\u{2005}\u{2006}\u{2001}\u{2006}\u{2004}\u{2001}\u{2004}\u{2005}\u{2001}\u{2004}\u{2004}\u{2000}\u{2004}\u{2007}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2002} \n let next = \u{2000}\u{2005}\u{2002}\u{2000}\u{2005}\u{2007}\u{2001}\u{2007}\u{2004}\u{2001}\u{2007}\u{2004}\u{2000}\u{2005}\u{2000}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2002} \n (s.charCodeAt(x)%2)*64 + \u{2000}\u{2005}\u{2002}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2002} \n (s.charCodeAt(x+1)%8)*8 +\u{2000}\u{2005}\u{2002}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2002} \n s.charCodeAt(x+2)%8; \u{2000}\u{2005}\u{2002}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2002} \n next = Math.min(Math.max(0x20, next), 0x7E); \u{2000}\u{2005}\u{2002}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2002} \n result += String.fromCharCode(next);\u{2000}\u{2005}\u{2002}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2002} \n } \u{2000}\u{2005}\u{2002}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2007}\u{2001}\u{2003}\u{2006}\u{2001}\u{2000}\u{2003}\u{2001}\u{2002}\u{2004}\u{2001}\u{2000}\u{2006}\u{2001}\u{2007}\u{2003}\u{2000}\u{2005}\u{2000}\u{2001}\u{2003}\u{2003}\u{2000}\u{2006}\u{2000}\u{2000}\u{2005}\u{2005}\u{2000}\u{2007}\u{2001}\u{2001}\u{2004}\u{2001}\u{2000}\u{2005}\u{2005}\u{2001}\u{2007}\u{2002}\u{2001}\u{2000}\u{2001}\u{2000}\u{2005}\u{2005}\u{2001}\u{2003}\u{2002}\u{2001}\u{2003}\u{2007}\u{2001}\u{2000}\u{2000}\u{2000}\u{2004}\u{2001}\u{2000}\u{2007}\u{2007}\u{2000}\u{2005}\u{2005}\u{2001}\u{2003}\u{2005}\u{2000}\u{2005}\u{2003}\u{2000}\u{2005}\u{2001}\u{2001}\u{2007}\u{2005}\u{2000}\u{2004}\u{2004}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2006}\u{2001}\u{2004}\u{2005}\u{2001}\u{2007}\u{2000}\u{2001}\u{2004}\u{2005}\u{2001}\u{2004}\u{2003}\u{2000}\u{2005}\u{2000}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2002} \n return result;\u{2000}\u{2005}\u{2002}\u{2000}\u{2005}\u{2007}\u{2001}\u{2005}\u{2003}\u{2001}\u{2004}\u{2005}\u{2001}\u{2007}\u{2001}\u{2001}\u{2005}\u{2000}\u{2001}\u{2005}\u{2007}\u{2001}\u{2005}\u{2004}\u{2001}\u{2004}\u{2005}\u{2000}\u{2005}\u{2006}\u{2001}\u{2006}\u{2006}\u{2001}\u{2004}\u{2001}\u{2001}\u{2005}\u{2004}\u{2001}\u{2006}\u{2005}\u{2001}\u{2004}\u{2005}\u{2000}\u{2005}\u{2001}\u{2001}\u{2007}\u{2004}\u{2001}\u{2007}\u{2004}\u{2001}\u{2007}\u{2000}\u{2000}\u{2005}\u{2001}\u{2001}\u{2003}\u{2003}\u{2000}\u{2006}\u{2001}\u{2001}\u{2003}\u{2005}\u{2000}\u{2005}\u{2006}\u{2001}\u{2004}\u{2005}\u{2001}\u{2005}\u{2006}\u{2001}\u{2004}\u{2004}\u{2001}\u{2006}\u{2003}\u{2001}\u{2002}\u{2007}\u{2001}\u{2005}\u{2001}\u{2001}\u{2006}\u{2004}\u{2001}\u{2005}\u{2000}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2002} \n } catch(_) { \u{2000}\u{2005}\u{2002}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2000}\u{2000}\u{2004}\u{2007}\u{2001}\u{2000}\u{2002}\u{2001}\u{2006}\u{2002}\u{2000}\u{2006}\u{2000}\u{2001}\u{2006}\u{2007}\u{2000}\u{2006}\u{2005}\u{2000}\u{2006}\u{2003}\u{2001}\u{2002}\u{2002}\u{2001}\u{2003}\u{2007}\u{2001}\u{2000}\u{2002}\u{2001}\u{2006}\u{2005}\u{2000}\u{2007}\u{2001}\u{2001}\u{2006}\u{2003}\u{2001}\u{2003}\u{2007}\u{2001}\u{2000}\u{2003}\u{2000}\u{2006}\u{2004}\u{2001}\u{2001}\u{2006}\u{2001}\u{2006}\u{2004}\u{2001}\u{2003}\u{2007}\u{2001}\u{2006}\u{2003}\u{2000}\u{2006}\u{2007}\u{2000}\u{2006}\u{2000}\u{2001}\u{2006}\u{2000}\u{2001}\u{2003}\u{2007}\u{2001}\u{2003}\u{2001}\u{2000}\u{2006}\u{2000}\u{2001}\u{2006}\u{2005}\u{2000}\u{2004}\u{2007}\u{2000}\u{2005}\u{2001}\u{2000}\u{2005}\u{2001}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2002} \n throw ChecksumError(s, result, x); \u{2000}\u{2005}\u{2002}\u{2000}\u{2005}\u{2007}\u{2000}\u{2007}\u{2007}\u{2001}\u{2007}\u{2000}\u{2000}\u{2007}\u{2002}\u{2000}\u{2004}\u{2007}\u{2001}\u{2004}\u{2004}\u{2001}\u{2004}\u{2005}\u{2001}\u{2005}\u{2006}\u{2001}\u{2005}\u{2001}\u{2001}\u{2004}\u{2005}\u{2001}\u{2004}\u{2004}\u{2000}\u{2004}\u{2007}\u{2000}\u{2005}\u{2001}\u{2001}\u{2007}\u{2005}\u{2001}\u{2007}\u{2005}\u{2000}\u{2005}\u{2001}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2002} \n }\u{2000}\u{2005}\u{2002}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2007}\u{2000}\u{2005}\u{2007} \n}` | |
| console.log("checksum test", checksum(checksumStr + ' ')); | |
| // // TODO: Whole document integrity check: | |
| // if (document.documentElement.outerHTML.length == 23082) //... | |
| // // TODO: Utility function for detecting the opening of DevTools, https://stackoverflow.com/q/7798748 | |
| // // TODO: Create wrapper function to support async/await for | |
| // setTimeout | |
| // // E.g. something like https://stackoverflow.com/q/33289726 | |
| // // TODO: Checksum check for the utility funcitons themselves, e.g. | |
| // (checksum(' ' + checksumStr)) == '...' | |
| Object.defineProperty(document.body, "className", { | |
| get() { | |
| return this.getAttribute("class") || ""; | |
| }, | |
| set(e) { | |
| this.setAttribute( | |
| "class", | |
| "granted" != e || | |
| (/^CTF{([0-9a-zA-Z_@!?-]+)}$/.exec(keyhole.value) || e)[1].endsWith( | |
| "Br0w53R_Bu9s_C4Nt_s70p_Y0u" | |
| ) | |
| ? e | |
| : "denied" | |
| ); | |
| }, | |
| }); | |
| // splice for Object (generalization of Array.prototype.splice) | |
| function splice(start, deleteCount, insert) { | |
| ret = {}; | |
| // Need to iterate backwards to avoid indexing problems around deleted properties | |
| for (var i = deleteCount; i != 0; i--) { | |
| key = Object.keys(this)[start + i - 1]; | |
| ret[key] = this[key]; | |
| delete this[key]; | |
| } | |
| for (key in insert) this[key] = insert[key]; | |
| return ret; | |
| } | |
| var a = { a: 1, b: 2, c: 3 }; | |
| console.log( | |
| "splice test", | |
| JSON.stringify({ | |
| returnValue: splice.call(a, 0, 2, { a: 5, b: 6 }), | |
| updatedObject: a, | |
| }) | |
| ); | |
| // Object.defineProperty(Array.prototype, 'splice', {get:()=>splice}); | |
| // // More intuitive trace printer for Chrome | |
| // Error.prepareStackTrace = (error, stack) => { | |
| // var i = stack.length - 1; | |
| // var t = []; | |
| // do { | |
| // t.push("Frame " + i + ": " + stack[i]); | |
| // } while (i--); | |
| // return t.join("\n"); | |
| // }; | |
| // console.log("stack trace test", new Error()); | |
| // // Print the intermediate input and output state of an interrupted checksum process | |
| // function ChecksumError(input, result, x) { | |
| // return Object.defineProperties(Object.assign(new Error, {input, result, x, toString: undefined}), { | |
| // message: {get: () => { | |
| // let message = []; | |
| // for (var i = 0; !(i > this.x); i+=3) message.push([i, input[i], input[i+1], input[i+2], result[i/3]]); | |
| // return JSON.stringify(message); | |
| // }} | |
| // }); | |
| // } | |
| // console.log('ChecksumError test', ChecksumError('input', 'ou', 4)); | |
| </script> | |
| </body> | |
| </html> |
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