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Aes-128-cbc-pkcs7padding encrypted PHP instance

2022-06-29 12:50:00 【owenzhang24】

The environment of this article PHP8.1,Mysql5.7
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Probably

AES-128-CBC-Pkcs7Padding encryption PHP example ：

(https://www.mklab.cn/utils/aes)

code base64, Pattern cbc, fill Pkcs7Padding, digit 128 position ,

Input format base64, Output format string, Character set utf-8,

secret key T3lUf3t4ddHzSx8U, Offset cdccB3uiWDu7mcxw

( for example 17350886066 After encryption +eupvMFtSc0E7veMi+XCgQ==)

(https://www.lddgo.net/encrypt/aes)

AES Introduce

1.AES brief introduction ：

AES Advanced encryption standard （Advanced Encryption Standard）, Is the U.S. NIST stay 2001 Published in , To replace DES Known as a widely used standard .AES Is a symmetric block cipher algorithm .

2.AES Packet length and key length ：

AES The plaintext packet length of is 128 position （16 byte ）, The key length can be 128 position （16 byte ）、192 position （24 byte ）、256 position （32 byte ）, Depending on the length of the key ,AES It is divided into AES-128、AES-192、AES-256 Three .

AES-PHP Service code

Code block Introduction

openssl_encrypt($data, $method, $password, $options, $iv)

Parameter description ：
$data Encrypt plaintext
$method Encryption method ： DES-ECB

DES-CBC

DES-CTR

DES-OFB

DES-CFB

$passwd Encryption key [ password ]
$options Data format options （ Optional ）【 Option has ：】 0

OPENSSL_RAW_DATA=1

OPENSSL_ZERO_PADDING=2

OPENSSL_NO_PADDING=3

$iv Secret initialization vector （ Optional ）

If method by DES-ECB, be iv No need to fill in

Specific code

<?phpnamespace app\service;class AesService{    public static ?AesService $_instance = null;    /* secret key ,22 Characters */    protected string $key = 'T3lUf3t4ddHzSx8U';    /* vector ,8 Or 10 Characters */    protected string $iv = 'cdccB3uiWDu7mcxw';    /**     * @return AesService|mixed     */    public static function instance(): ?AesService    {        if (!static::$_instance) static::$_instance = new self();        return static::$_instance;    }    public function setkey(string $key): static    {        $this->key = $key;        return $this;    }    public function getkey(): string    {        return $this->key;    }    public function getiv(): string    {        return $this->iv;    }    /**     *  encryption      * AES/CBC/PKCS7Padding     * AES encryption ：(https://www.mklab.cn/utils/aes)     *  code base64, Pattern CBC, fill Pkcs7Padding, digit 128 position , Input format base64, Output format string,     *  Character set utf-8, secret key T3lUf3t4ddHzSx8U, Offset cdccB3uiWDu7mcxw     * ( for example 17350886066 After encryption +eupvMFtSc0E7veMi+XCgQ==)     * (https://www.lddgo.net/encrypt/aes)     *     * @param boolean $status  Is it encrypted      *     * @return string  Processed data      */    public function encrypt($data, bool $status = true): string    {        if (is_array($data)) $data = json_encode($data);        $key = $this->getkey();        $iv  = $this->getiv();        if ($status) return base64_encode(openssl_encrypt($data, 'AES-128-CBC', $key, OPENSSL_RAW_DATA, $iv));        return $data;    }    /**     *  Decrypt      *     * @return string  The encrypted string is not complete and will return an empty string value      */    public function decrypt($data, bool $status = true): string    {        $key = $this->getkey();        $iv  = $this->getiv();        if ($status) return openssl_decrypt(base64_decode($data), 'AES-128-CBC', $key, OPENSSL_RAW_DATA, $iv);        return $data;    }}