How to use encrypted values in where conditions? about laravel-gdpr HOT 5 CLOSED

<?php

namespace App\Traits;

trait HashesAttributes
{
    /**
     * Set a given attribute on the model.
     *
     * @param  string  $key
     * @param  mixed  $value
     * @return $this
     */
    public function setAttribute(
        $key,
        $value
    ) {
        if (in_array($key, $this->encrypted) &&
            !is_null($value)) {
            $this->hashAttributeValue($key, $value);
        }

        parent::setAttribute($key, $value);
    }

    /**
     * Hash the given attribute's value.
     *
     * @param  string  $key
     * @param  mixed  $value
     * @return $this
     */
    public function hashAttributeValue(
        $key,
        $value
    ) {
        $hash = hash_hmac('sha1', $value, config('app.key'));

        parent::setAttribute($key . '_hash', $hash);
    }

    /**
     * Add a where hash clause to the query.
     *
     * @param  \Illuminate\Database\Eloquent\Builder $query
     * @param  string  $key
     * @param  mixed  $value
     * @return \Illuminate\Database\Eloquent\Builder
     */
    public function scopeWhereHash(
        $query,
        $key,
        $value
    ) {
        $hash = hash_hmac('sha1', $value, config('app.key'));

        return $query->where($key . '_hash', $hash);
    }
}

$users = App\User::whereHash('name', 'Sander')->get();