PHP code example of starkbank / ecdsa

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

starkbank / ecdsa example snippets

# Generate privateKey from PEM string
$privateKey = EllipticCurve\PrivateKey::fromPem("
    -----BEGIN EC PARAMETERS-----
    BgUrgQQACg==
    -----END EC PARAMETERS-----
    -----BEGIN EC PRIVATE KEY-----
    MHQCAQEEIODvZuS34wFbt0X53+P5EnSj6tMjfVK01dD1dgDH02RzoAcGBSuBBAAK
    oUQDQgAE/nvHu/SQQaos9TUljQsUuKI15Zr5SabPrbwtbfT/408rkVVzq8vAisbB
    RmpeRREXj5aog/Mq8RrdYy75W9q/Ig==
    -----END EC PRIVATE KEY-----
");


# Create message from json
$message = array(
    "transfers" => array(
        array(
            "amount" => 100000000,
            "taxId" => "594.739.480-42",
            "name" => "Daenerys Targaryen Stormborn",
            "bankCode" => "341",
            "branchCode" => "2201",
            "accountNumber" => "76543-8",
            "tags" => array("daenerys", "targaryen", "transfer-1-external-id")
        )
    )
);

$message = json_encode($message, JSON_PRETTY_PRINT);

$signature = EllipticCurve\Ecdsa::sign($message, $privateKey);

# Generate Signature in base64. This result can be sent to Stark Bank in header as Digital-Signature parameter
echo "\n" . $signature->toBase64();

# To double check if message matches the signature
$publicKey = $privateKey->publicKey();

echo "\n" . EllipticCurve\Ecdsa::verify($message, $signature, $publicKey);

# Generate new Keys
$privateKey = new EllipticCurve\PrivateKey;
$publicKey = $privateKey->publicKey();

$message = "My test message";

# Generate Signature
$signature = EllipticCurve\Ecdsa::sign($message, $privateKey);

# Verify if signature is valid
echo "\n" . EllipticCurve\Ecdsa::verify($message, $signature, $publicKey);

$newCurve = new EllipticCurve\Curve(
    "0xf1fd178c0b3ad58f10126de8ce42435b3961adbcabc8ca6de8fcf353d86e9c00",
    "0xee353fca5428a9300d4aba754a44c00fdfec0c9ae4b1a1803075ed967b7bb73f",
    "0xf1fd178c0b3ad58f10126de8ce42435b3961adbcabc8ca6de8fcf353d86e9c03",
    "0xf1fd178c0b3ad58f10126de8ce42435b53dc67e140d2bf941ffdd459c6d655e1",
    "0xb6b3d4c356c139eb31183d4749d423958c27d2dcaf98b70164c97a2dd98f5cff",
    "0x6142e0f7c8b204911f9271f0f3ecef8c2701c307e8e4c9e183115a1554062cfb",
    "frp256v1",
    array(1, 2, 250, 1, 223, 101, 256, 1)
);

EllipticCurve\Curve::add($newCurve);

$publicKeyPem = "-----BEGIN PUBLIC KEY-----
MFswFQYHKoZIzj0CAQYKKoF6AYFfZYIAAQNCAATeEFFYiQL+HmDYTf+QDmvQmWGD
dRJPqLj11do8okvkSxq2lwB6Ct4aITMlCyg3f1msafc/ROSN/Vgj69bDhZK6
-----END PUBLIC KEY-----";

$publicKey = EllipticCurve\PublicKey::fromPem($publicKeyPem);

print_r($publicKey->toPem());

$publicKeyPem = EllipticCurve\Utils\File::read("publicKey.pem");
$signatureDer = EllipticCurve\Utils\File::read("signatureDer.txt");
$message = EllipticCurve\Utils\File::read("message.txt");

$publicKey = EllipticCurve\PublicKey::fromPem($publicKeyPem);
$signature = EllipticCurve\Signature::fromDer($signatureDer);

echo "\n" . EllipticCurve\Ecdsa::verify($message, $signature, $publicKey);

$signatureDer = EllipticCurve\Utils\File::read("signatureDer.txt");

$signature = EllipticCurve\Signature::fromDer($signatureDer);

echo "\n" . $signature->toBase64();

sh

sh
php tests/test.php