Function keyFunc

test/verify.tests.js:117–121

(header, callback)

    it('simple callback', function (done) {
      const keyFunc = function(header, callback) {
        assert.deepEqual(header, { alg: 'HS256', typ: 'JWT' });

        callback(undefined, key);
      };

      jwt.verify(token, keyFunc, options, function (err, p) {
        assert.isNull(err);