solarai/app/Libs/EncryptQuery.php

<?php

namespace App\Libs;

trait EncryptQuery
{
    // 암호값을 고정하기 위함
    private $iv = 'FIXED_ENCRYPT_ST';

    public function scopeWhereCompareCrypt($query, $field, $compare, $value)
    {
        return $query->where($field, $compare, $this->encrypt($value));
    }

    public function scopeWhereCrypt($query, $field, $value)
    {
        return $query->where($field, $this->encrypt($value));
    }

    public function scopeOrWhereCrypt($query, $field, $value)
    {
        return $query->orWhere($field, $this->encrypt($value));
    }

    public function scopeWhereInCrypt($query, $field, $values)
    {
        $ins = [];
        foreach ($values as $value) {
            $ins[] = $this->encrypt($value);
        }
        return $query->whereIn($field, $ins);
    }

    public function encrypt($value)
    {
        return base64_encode(openssl_encrypt($value, "AES-256-CBC", config('app.key'), 0, $this->iv));
    }

    public function decrypt($value)
    {
        return openssl_decrypt(base64_decode($value), "AES-256-CBC", config('app.key'), 0, $this->iv);
    }
}