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Merge branch 'master' of https://www.github.com/plane000/examples

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Ben
2018-09-20 17:37:44 +01:00
parent 7f6fa381b3 3ab0131dca
commit a3a319859d
5 changed files with 209 additions and 30 deletions
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0
JavaScript/javascript safe/.vscode/settings.json → JavaScript/Part2-CTF-JS/.vscode/settings.json vendored
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118
JavaScript/Part2-CTF-JS/challenge.html Normal file
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JavaScript/Part2-CTF-JS/index.html Normal file
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Professional data safe</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<script>
function x(g) {
console.log(g);
let success = 1;
let res = [];
g.split('').forEach((c) => {
let i = alphabet.indexOf(c);
if (i == -1) success = -1;
res.push(i);
});
if (success == -1) return false;
let compare = "";
res.forEach((c) => {
compare += c;
});
let result = computeChecksum(parseInt(compare));
if (result == 2.1853534282531312e+48) return true;
return false;
}
let alphabet = "abcdefghijklmnoqrstuvwxyz1234567890{}-";
function computeChecksum(num) {
num = Math.floor(Math.abs(num));
if (num < 10) {
return num;
}
let divisor = Math.pow(10, num.toString().length);
let checksum = 0;
while (divisor >= 10) {
let quotient = Math.floor(num / divisor);
let divisorAsString = divisor.toString();
checksum += quotient;
num -= quotient * divisor;
divisor = divisorAsString.slice(0, divisorAsString.length - 1);
}
return checksum + num;
}
function check(a) {
localStorage.content = "pwwd24ctf189HIhi"
k = document.getElementById("keyhole");
a = document.getElementById("access");
if (!x(k.value)) return a.innerHTML = "access denied"
a.innerHTML = "access granted"
password = Array.from(k.value).map(c => c.charCodeAt());
encrypted = localStorage.content || '';
}
</script>
password: <input id="keyhole" type="text" autofocus onchange="check()" placeholder="🔑">
<div id="access"></div>
</body>
</html>

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JavaScript/Part2-CTF-JS/text.txt Normal file
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***HELLO AND WELCOME TO PART 2 OF THE 4 PART CTF***
*you don't need to have completed part 1 to do this but in order to win you must have done all 4*
CTF:
Same deal with last time, this is a javascript safe that i cba to write a backstory for, the flag is still in the format `/ctf{.*}/`.
Winners will be awarded a special role
On completion send the flag to Ben
**RULES:**
0) DO NOT SHARE THE FLAG
1) Use any method you see fit to solve it, if it works you reverse engeneered it :)
Have fun :)))))

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JavaScript/javascript safe/index.html
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@@ -1,30 +0,0 @@
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Professional data safe</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<script>
x = () => {
return false;
}
</script>
<script>
check = (a) => {
localStorage.content = "pwwd24ctf189HIhi"
k = document.getElementById("keyhole");
a = document.getElementById("access");
if (!x(k.value)) return a.innerHTML = "access denied"
a.innerHTML = "access granted"
password = Array.from(k.value).map(c => c.charCodeAt());
encrypted = localStorage.content || '';
content = encrypted.map((c, x) => c ^ password[i % k.value.length]).map(String.fromCharCode).join('');
}
</script>
password: <input id="keyhole" type="text" autofocus onchange="check()" placeholder="🔑">
<div id="access"></div>
</body>
</html>