Topic: How to authenticate with challange and private keys? [Java] (Read 1401 times)
key.sign returns an object with the r/s components in it. You can send them back to the server.
I'd like to translate the following JS code into Java code:
I'm want to use bitcoinj for this. Maybe anyone has already worked with it and can help how the calls in java have to be constructed? I came up with the following, but don't know how to continue:
If what I did is correct: how do I get the challange_key that has to be send back to the server out of the ECkey that I signed?
Code:
var key = new Bitcoin.ECKey(Crypto.util.hexToBytes(SHA256(password))); //password = private user password
var signed_challenge = Crypto.util.bytesToHex(key.sign(Crypto.util.hexToBytes(SHA256(challenge_key)))); //challenge_key = generated key from server
The challenge_key is the desired output and must be send back to the server.var signed_challenge = Crypto.util.bytesToHex(key.sign(Crypto.util.hexToBytes(SHA256(challenge_key)))); //challenge_key = generated key from server
I'm want to use bitcoinj for this. Maybe anyone has already worked with it and can help how the calls in java have to be constructed? I came up with the following, but don't know how to continue:
Code:
String password; //the private user pw
String challenge; //a string from the server
BigInteger privkey = new BigInteger(Hex.decode(Sha256Hash.create(password.getBytes()).toString()));
ECKey key = new ECKey(privkey);
key.sign(new Sha256Hash(challenge));
String challenge; //a string from the server
BigInteger privkey = new BigInteger(Hex.decode(Sha256Hash.create(password.getBytes()).toString()));
ECKey key = new ECKey(privkey);
key.sign(new Sha256Hash(challenge));
If what I did is correct: how do I get the challange_key that has to be send back to the server out of the ECkey that I signed?
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