thinkphp encryption method

Recently, more and more websites have begun to use the thinkphp framework to develop and maintain their websites. This is because the thinkphp framework has many advantages, such as easy learning, powerful template engine, high security, etc. However, during the development process, you need to pay attention to data security issues. One of the important tasks is to encrypt data. This article will explore how to encrypt data in thinkphp.

1. Use the encryption function that comes with the system

The encryption function that comes with the thinkphp framework is thinkhelperHash::make($str). This function can be used to encrypt a string ($str).

The usage is as follows:

$str = 'Hello World';
$encrypt_str = thinkhelperHash::make($str);

The encrypted string $encrypt_str, which is a 40-bit random string. This method is a simple encryption method based on a hash algorithm, which is sufficient for some simple scenarios.

2. Use third-party libraries

In addition to the system’s own encryption functions, thinkphp also supports the introduction of third-party libraries for encryption. For example, you can use the PHP encryption extension library sodium to encrypt data.

The usage method is as follows:

First you need to install the sodium extension library, use the command:

pecl install libsodium

After the installation is completed, you need to add a line to the php.ini file:

extension=sodium.so

Then use the encryption function in the code to encrypt. In the sodium library, the encryption function is sodium_crypto_secretbox($str, $nonce, $secretKey).

Among them, $str is the string that needs to be encrypted, $nonce is the unique string, and $secretKey is the key.

The usage method is as follows:

$str = 'Hello World';
$nonce = random_bytes(SODIUM_CRYPTO_SECRETBOX_NONCEBYTES);
$secretKey = sodium_crypto_secretbox_keygen();
$encrypt_str = sodium_crypto_secretbox($str, $nonce, $secretKey);

The encrypted $encrypt_str can be decrypted using the same key and nonce.

3. Custom encryption method

If you want a more secure encryption method, you can customize the encryption function or call a third-party library for encryption.

The method of using a custom encryption function is as follows:

function my_encrypt($data, $key){
    $iv = mcrypt_create_iv(
        mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC),
        MCRYPT_DEV_URANDOM
    );

    $encrypted = base64_encode(
        $iv .
        mcrypt_encrypt(
            MCRYPT_RIJNDAEL_128,
            hash('sha256', $key, true),
            $data,
            MCRYPT_MODE_CBC,
            $iv
        )
    );
    return $encrypted;
}

This is an encryption function based on the aes-256-ctr algorithm, which can customize the key and encrypted data. However, it should be noted that mcrypt has been deprecated in PHP 7.2 version, so you need to find an alternative method by yourself.

Summary

Data security is an issue that must be considered during website development. In the thinkphp framework, data security can be ensured through the system's own encryption functions, third-party libraries, or custom encryption functions. However, it is necessary to choose the appropriate encryption method according to specific needs to achieve the best effect.

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