Given a string contains hex characters (group by two) we can convert to ASCII characters using the following Javascript Function (takes two characters and convert to decimal and then obtain its ASCII character):
1 2 3 4 5 6 7 | function hexify(s) { let r = []; for (let i = 0; i < s.length - 1; i += 2) { r.push(String.fromCharCode(parseInt(s.charAt(i) + s.charAt(i + 1), 16))); } return r.join(""); } |
function hexify(s) {
let r = [];
for (let i = 0; i < s.length - 1; i += 2) {
r.push(String.fromCharCode(parseInt(s.charAt(i) + s.charAt(i + 1), 16)));
}
return r.join("");
}For example:
1 2 | // the following returns "REVERT opcode executed" hexify("524556455254206f70636f6465206578656375746564"); |
// the following returns "REVERT opcode executed"
hexify("524556455254206f70636f6465206578656375746564");The above function has been integrated into a Serverless API based on CloudFlare Worker, see below API call:
1 | curl -s -X POST --data "524556455254206f70636f6465206578656375746564" "https://str.justyy.workers.dev/hex" |
curl -s -X POST --data "524556455254206f70636f6465206578656375746564" "https://str.justyy.workers.dev/hex"
You can pass parameter string as GET e.g.
1 | curl -s -X GET "https://str.justyy.workers.dev/hex/?s=524556455254206f70636f6465206578656375746564" |
curl -s -X GET "https://str.justyy.workers.dev/hex/?s=524556455254206f70636f6465206578656375746564"
There is a simple way from the BASH command. We can actually pipe the input using xxd:
1 | echo "524556455254206f70636f6465206578656375746564" | xxd -ps -r |
echo "524556455254206f70636f6465206578656375746564" | xxd -ps -r
–EOF (The Ultimate Computing & Technology Blog) —
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