Error: Signature without r or s

[bolzon]

I want to verify a message.
I have the message, signature and public key, but no private key.

When verifying the message, I get the error: Signature without r or s

Public key format is: '04' + X + Y
Signature format is: R + S
Both in hex.

Am I doing something wrong or is this a bug?

My code:

var msg = '...'; // hidden
var pubKey = '04e6f90994768e51c2834879841542992494b9030e1b765e766f8b60a56213fb9f91903ee24f6baaaaf6afbce3adcfbc4362c1e1e21218ed3f1be6317908db3323';
var signature = 'b32911bfd9f88ae4a0c337df2c0f254d2232a162b85ce3019c2ae7cb1f56f06b525b4813557ace1e6f2f2080e77dd49ecec49d030a4fa23854880e696e941344';

var ecdsa = new elliptic.ec('p256');
var res = ecdsa.verify(msg, signature, pubKey, 'hex'); // throws exception

I've tried to use the ec/Signature class to load this, but no success too.

Thanks.

[indutny]

I'm afraid elliptic does not understand this format. Try splitting signature by halves an pass it as an object:

{ r: '...', s: '...' }

I think it should work this way!

[indutny]

And if it works - would you mind helping me to fix the documentation to make it more evident?

[bolzon]

Wonderful. Worked perfectly, thanks!

var pubKey = '04e6f90994768e51c2834879841542992494b9030e1b765e766f8b60a56213fb9f91903ee24f6baaaaf6afbce3adcfbc4362c1e1e21218ed3f1be6317908db3323';
var signature = 'b32911bfd9f88ae4a0c337df2c0f254d2232a162b85ce3019c2ae7cb1f56f06b525b4813557ace1e6f2f2080e77dd49ecec49d030a4fa23854880e696e941344';

var msg = '...'; // sth secret
var m = signature.match(/([a-f\d]{64})/gi);

signature = {
  r: m[0],
  s: m[1]
};

var ecdsa = new elliptic.ec('p256');
var res = ecdsa.verify(msg, signature, pubKey, 'hex');

I'll add this to the documentation.
Thanks again!