PKCS #11 Smartcard Sign

This module allows you to sign anything with a private key stored on PKCS #11 smartcard.
For example, you can upload your key to YubiKey and generate signatures.

How it works

It's using pkcs11-tool
from OpenSC to process signatures. If it's not installed, you will get an error.

Example

``javascript
const signer = require('pkcs11-smartcard-sign');

// Basic usage:
// - SHA-256
// - Read key with ID 02
// - Prompt for PIN
signer.sign({
data: Buffer.from('something')
}).then(signature => {
console.log(signature.toString('hex'));
}).catch(err => {
console.error(err);
});

// Advanced options
signer.sign({
data,
// predefined PIN
pin: '0000',
// ID of the key to use (on the smart card)
key: '03',
// algo: sha256 or sha512
algo: 'sha512',
// select N-th smart card reader configured by the system
reader: 2,
// verify with this public key after sign
verifyKey: fs.readFileSync('your-public-key.pem'),
// module to use
module: '/usr/local/lib/libykcs11.1.dylib'
});
``