md lock

const MdLockIcon = (props) => (
  <svg 
    xmlns="http://www.w3.org/2000/svg" 
    viewBox="0 0 24 24" 
    width="24"
    height="24"
    fill="none" 
    stroke="currentColor" 
    strokeWidth="2" 
    strokeLinecap="round" 
    strokeLinejoin="round" 
    {...props}
  >
    <g fill="none"><path d="M0 0h24v24H0V0z"/><path d="M0 0h24v24H0V0z" opacity=".87"/></g><path d="M18 8h-1V6c0-2.76-2.24-5-5-5S7 3.24 7 6v2H6c-1.1 0-2 .9-2 2v10c0 1.1.9 2 2 2h12c1.1 0 2-.9 2-2V10c0-1.1-.9-2-2-2zM9 6c0-1.66 1.34-3 3-3s3 1.34 3 3v2H9V6zm9 14H6V10h12v10zm-6-3c1.1 0 2-.9 2-2s-.9-2-2-2-2 .9-2 2 .9 2 2 2z"/>
  </svg>
);