aes-256-gcm使用PHP加密，使用javascript解密

<?php
function encrypt($data, $key, $iv) {
    $cipher = "aes-256-gcm";
    $tag = null;
    $encryptedData = openssl_encrypt($data, $cipher, $key, OPENSSL_RAW_DATA, $iv, $tag);
    return base64_encode($encryptedData . $tag);
}

$key = "YourEncryptionKey";
$iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length("aes-256-gcm"));
$data = "Hello, World!";

$encrypted = encrypt($data, $key, $iv);
echo "Encrypted data: " . $encrypted;
?>

function decrypt(encryptedData, key, iv) {
    return crypto.subtle.importKey(
        "raw",
        key,
        { name: "AES-GCM" },
        false,
        ["decrypt"]
    ).then(function (cryptoKey) {
        return crypto.subtle.decrypt(
            { name: "AES-GCM", iv: iv },
            cryptoKey,
            encryptedData
        );
    }).then(function (decryptedData) {
        return new TextDecoder().decode(decryptedData);
    });
}

var key = new Uint8Array([ /* YourEncryptionKey in Uint8Array format */ ]);
var iv = new Uint8Array([ /* Initialization Vector in Uint8Array format */ ]);
var encryptedData = "/* Encrypted data in Base64 format */";

var decrypted = decrypt(
    Uint8Array.from(atob(encryptedData), c => c.charCodeAt(0)),
    key,
    iv
).then(function (decryptedData) {
    console.log("Decrypted data: " + decryptedData);
});