B4J Question [ Jserver ] encrypt with php codeigniter 4, decrypt with B4j

Inrenbang

Member
Licensed User
Hello, how to decrypt string data which already encrypted using php codeigniter 4 internal function

this is ci4 encryption configuration
php codeigniter 4:
<?php

namespace Config;

use CodeIgniter\Config\BaseConfig;

/**
 * Encryption configuration.
 *
 * These are the settings used for encryption, if you don't pass a parameter
 * array to the encrypter for creation/initialization.
 */
class Encryption extends BaseConfig
{
    /**
     * --------------------------------------------------------------------------
     * Encryption Key Starter
     * --------------------------------------------------------------------------
     *
     * If you use the Encryption class you must set an encryption key (seed).
     * You need to ensure it is long enough for the cipher and mode you plan to use.
     * See the user guide for more info.
     *
     * @var string
     */
    public $key = 'this is example key';

    /**
     * --------------------------------------------------------------------------
     * Encryption Driver to Use
     * --------------------------------------------------------------------------
     *
     * One of the supported encryption drivers.
     *
     * Available drivers:
     * - OpenSSL
     * - Sodium
     *
     * @var string
     */
    public $driver = 'OpenSSL';

    /**
     * --------------------------------------------------------------------------
     * SodiumHandler's Padding Length in Bytes
     * --------------------------------------------------------------------------
     *
     * This is the number of bytes that will be padded to the plaintext message
     * before it is encrypted. This value should be greater than zero.
     *
     * See the user guide for more information on padding.
     *
     * @var int
     */
    public $blockSize = 16;

    /**
     * --------------------------------------------------------------------------
     * Encryption digest
     * --------------------------------------------------------------------------
     *
     * HMAC digest to use, e.g. 'SHA512' or 'SHA256'. Default value is 'SHA512'.
     *
     * @var string
     */
    public $digest = 'SHA512';
}

this is how i encrypt

encrypt:
$encrypter = \Config\Services::encrypter();

$encrypter->encrypt('string to encrypt');
 

Inrenbang

Member
Licensed User
It is not clear which encryption algorithm is used here. You need to find the exact algorithm.
After reading CI4 documentation, it use OpenSSL handler, AES-256-CTR cipher and HMAC-Based Key Derivation Function (HKDF), HMAC digest using SHA512.
 
Last edited:
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TILogistic

Expert
Licensed User
Longtime User
Yes, as my reply here, the closest i have been trying is using Alice library, but again there is an error, this is my post about alice.
test:
 
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techknight

Well-Known Member
Licensed User
Longtime User
Very similar thread popped up just before yours, and it provides some good information such as b4xcipher using the openssl underpinnings:

 
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