User class example for Sidus/EncryptionBundle with FOS/UserBundle

User.php

<?php

namespace MyNameSpace\UserBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use FOS\UserBundle\Model\User as BaseUser;
use Sidus\EncryptionBundle\Entity\UserEncryptionProviderInterface;

/**
 * @ORM\Entity(repositoryClass="MyNameSpace\UserBundle\Entity\UserRepository")
 * @ORM\Table(name="mynamespace_user")
 */
class User extends BaseUser implements UserEncryptionProviderInterface
{
    /**
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;

    /**
     * @ORM\Column(type="string", name="encrypted_cipher_key", nullable=true)
     */
    protected $encryptedCipherKey;

    /**
     * Get id
     *
     * @return integer
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * @return mixed Binary data
     */
    public function getEncryptedCipherKey()
    {
        return hex2bin($this->encryptedCipherKey);
    }

    /**
     * @param mixed $encryptedCipherKey
     *
     * @return User
     */
    public function setEncryptedCipherKey($encryptedCipherKey)
    {
        $this->encryptedCipherKey = bin2hex($encryptedCipherKey);

        return $this;
    }

    /**
     * @return int
     */
    public function getEncryptionOwnershipId()
    {
        // If you want to share data between a group, return the id of the group.
        
        // If you want the data to be accessible by the current user only :
        return $this->getId();
    }
}