problem in making ethereum wallet address with your library

[se8820726]

hi I'm using your library to generate private key and then public key and then generate ethereum wallet address from it. this is my code:

use Elliptic\EC;
use kornrunner\Keccak;

$ec = new EC('secp256k1');
$key = $ec->genKeyPair();

$priv = $key->getPrivate('hex');
$pub = substr($key->getPublic('hex'),2);

$hash = Keccak::hash($pub, 256);
$wallet = substr($hash,-40);

var_dump($priv);    // ex:  77a1d1930a78c7ff16a849b519729b67e738ea49c4db19ee8a6f1dea816c7577
var_dump($pub);   // ex:   db93fb7c12b067e2e7794bb49c704159d78a0c4efa5f7e65c5bbb8e343ec602d5ee39169e3a06d4cb0db764445f2772ed5fdb1d3fd18a2f5cdc15b2581b74216
var_dump($hash);  // ex: 5335602cd85aff99e78fdb15cee40b78e358cfb8c4f1a8f1110424401e3febc6
var_dump($wallet);// ex: cee40b78e358cfb8c4f1a8f1110424401e3febc6

but when I use this private key in https://www.myetherwallet.com/ it shows below address as wallet: B1b71CEc4a07F4EDAc54A620f4Cf4EbC6e7405DD

would you help me to find solution please?

[slacker69]

I'm not the owner of this library but I started work on how to convert ECC keys into DER/PEM format, maybe that would work. here is some partially finished code to try out:

//for the secp256k1 curve you can do this: $der_private = "\x30\x74\x02\x01\x01\x04\x20".$priv->toString(32 bytes)."\xa0\x07\x06\x05\x2b\x81\x04\x00\x0a\xa1\x44\x03\x42\x00\x04".$pub->x->toString(32 bytes).$pub->y->toString(32 bytes); $pem_private = implode(PHP_EOL, str_split(base64_encode($der_private), 64)); $pem_private = '-----BEGIN EC PRIVATE KEY-----'.PHP_EOL.$pem_private; $pem_private .= '-----END EC PRIVATE KEY-----'.PHP_EOL;

$der_public = "\x30\x56\x30\x10\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x05\x2b\x81\x04\x00\x0a\x03\x42\x00\x04".$pub->x->toString(32 bytes).$pub->y->toString(32 bytes); $pem_public = implode(PHP_EOL, str_split(base64_encode($der_public), 64)); $pem_public = '-----BEGIN PUBLIC KEY-----'.PHP_EOL.$pem_public; $pem_public .= '-----END PUBLIC KEY-----'.PHP_EOL;

[ssmyczynski]

Here is working example:

use Elliptic\EC;
use kornrunner\Keccak;

function pubKeyToAddress($pubkey) {
        return "0x" . substr(Keccak::hash(substr(hex2bin($pubkey->encode("hex")), 1), 256), 24);
}

$ec = new EC('secp256k1');
$priv = $ec->genKeyPair();
$pub  = $priv->getPublic();

echo 'Private: ' . $priv->getPrivate("hex") . PHP_EOL;
echo 'Public:  ' . $pub->encode("hex", true) . PHP_EOL;
echo 'Address: ' . pubKeyToAddress($pub) . PHP_EOL;