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How does PHP implement AES encryption and decryption consistent with Java?
How does PHP implement AES encryption and decryption consistent with Java?
Apr 01, 2025 am 07:15 AM
How to implement AES encryption and decryption in php?
In daily development, we often need to implement consistent encryption and decryption functions among different programming languages. Recently, a developer shared a piece of AES encryption and decryption code implemented in Java, and hopes to achieve the same effect in php. Below we will discuss in detail how to use php to achieve AES encryption and decryption consistent with Java code.
First, we need to understand the implementation details of aes encryption and decryption in Java code. The aes algorithm is used in the java code, and the keygenerator and secureriandom are generated. When encrypted, the data is converted into a hexadecimal string, and when decrypted, the hexadecimal string is converted back to binary data for decryption.
Next, let's look at how to implement similar functions in php. The openssl extension of php provides powerful encryption functions, which we can use to implement AES encryption and decryption. The following is the reference code:
class AESUtil
{
private static $key = "test"; // Default key/**
* Encryption function*
* @param string $content data to be encrypted* @param string|null $key The key used to encrypt, if not specified, uses the default key* @return string Encrypted hexadecimal string*/
public static function encrypt($content, $key = null)
{
if (is_null($key)) { // If no key is specified, use the default key $key = self::$key;
}
// Generate random initialization vector (IV)
$iv_size = openssl_cipher_iv_length('AES-128-CBC');
$iv = openssl_random_pseudo_bytes($iv_size);
// Encrypt the data $encrypted_data = openssl_encrypt($content, 'AES-128-CBC', $key, OPENSSL_RAW_DATA, $iv);
// Connect the IV and the encrypted data as the result of the output $data_with_iv = $iv . $encrypted_data;
return strtoupper(bin2hex($data_with_iv)); // Convert the result to a hexadecimal string and return }
/**
* Decrypt function*
* @param string $content data to decrypt (hexadecimal string)
* @param string|null $key The key used to decrypt, if not specified, the default key is used * @return string The decrypted data*/
public static function decrypt($content, $key = null)
{
if (is_null($key)) { // If no key is specified, use the default key $key = self::$key;
}
// Convert the input hexadecimal string into binary data $data_with_iv = hex2bin($content);
// Extract IV and encrypted data from the data $iv_size = openssl_cipher_iv_length('AES-128-CBC');
$iv = substr($data_with_iv, 0, $iv_size);
$encrypted_data = substr($data_with_iv, $iv_size);
// Decrypt the data $decrypted_data = openssl_decrypt($encrypted_data, 'AES-128-CBC', $key, OPENSSL_RAW_DATA, $iv);
return $decrypted_data; // Return decrypted data}
}
// Use example $plaintext = "Hello, World!";
$encrypted_text = AESUtil::encrypt($plaintext);
$decrypted_text = AESUtil::decrypt($encrypted_text);
echo "Original text: " . $plaintext . PHP_EOL;
echo "After encryption: " . $encrypted_text . PHP_EOL;
echo "After decrypted: " . $decrypted_text . PHP_EOL;
This php code uses aes-128-cbc encryption mode and generates a random iv vector passed as a parameter to the encryption and decryption function. During encryption, the iv vector and the encrypted data are encoded together. When decrypting, the encoded string is first decoded into the iv vector and the ciphertext, and then decrypted. This method ensures that the AES encryption and decryption implemented by PHP is consistent with the Java code.
Through the above method, we can achieve aes encryption and decryption effect consistent with Java code. If you have any further questions or need additional help, please continue to ask questions.
The above is the detailed content of How does PHP implement AES encryption and decryption consistent with Java?. For more information, please follow other related articles on the PHP Chinese website!
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