js最安全的加密

async function encryptData(data, key) {
    const encodedData = new TextEncoder().encode(data);
    const iv = crypto.getRandomValues(new Uint8Array(16)); // 初始化向量
    const encryptedData = await crypto.subtle.encrypt(
        {
            name: "AES-GCM",
            iv: iv,
        },
        key,
        encodedData
    );
    return { encryptedData, iv };
}

async function decryptData(encryptedData, key, iv) {
    const decryptedData = await crypto.subtle.decrypt(
        {
            name: "AES-GCM",
            iv: iv,
        },
        key,
        encryptedData
    );
    return new TextDecoder().decode(decryptedData);
}

// 生成密钥
window.crypto.subtle.generateKey(
    {
        name: "AES-GCM",
        length: 256, // 可以是128, 192, or 256
    },
    true, // 是否可以导出密钥
    ["encrypt", "decrypt"] // 密钥的用途
).then(key => {
    const data = "Hello, World!";
    encryptData(data, key).then(({ encryptedData, iv }) => {
        decryptData(encryptedData, key, iv).then(decryptedData => {
            console.log(`Original Data: ${data}`);
            console.log(`Decrypted Data: ${decryptedData}`);
        });
    });
});