Skip to content

ECDSA recovery public key example #204

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
t4sk wants to merge 1 commit into
base: master
Choose a base branch
from
Open

ECDSA recovery public key example #204

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
14 changes: 13 additions & 1 deletion README.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -55,7 +55,7 @@ var ec = new EC('secp256k1');
// Generate keys
var key = ec.genKeyPair();

// Sign the message's hash (input must be an array, or a hex-string)
// Sign the message's hash (input must be a byte array, or a hex-string)
var msgHash = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ];
var signature = key.sign(msgHash);

Expand Down Expand Up @@ -95,6 +95,18 @@ var signature = { r: 'b1fc...', s: '9c42...' }; // case 3

// Verify signature
console.log(key.verify(msgHash, signature));

// Recover public key from signature
const BN = require("bn.js")

function hexToDec(hex) {
return new BN(hex, 16).toString(10)
}

var recoveryId = ec.getKeyRecoveryParam(msgHash, signature, key.getPublic());

// msgHash must be decimal number
var recoveredPubKey = ec.recoverPubKey(hexToDec(msgHash), signature, recoveryId);
```

### EdDSA
Expand Down