js字符串加密解密

// 加密函数
async function encrypt(text, key) {
  const encoder = new TextEncoder();
  const encodedText = encoder.encode(text);
  const cryptoKey = await crypto.subtle.importKey(
    "raw",
    encoder.encode(key),
    { name: "AES-GCM" },
    false,
    ["encrypt"]
  );
  const iv = crypto.getRandomValues(new Uint8Array(12)); // 初始化向量
  const encrypted = await crypto.subtle.encrypt(
    { name: "AES-GCM", iv },
    cryptoKey,
    encodedText
  );
  return {
    iv: Array.from(iv),
    encrypted: Array.from(new Uint8Array(encrypted)),
  };
}

// 解密函数
async function decrypt(encryptedData, key) {
  const decoder = new TextDecoder();
  const cryptoKey = await crypto.subtle.importKey(
    "raw",
    new TextEncoder().encode(key),
    { name: "AES-GCM" },
    false,
    ["decrypt"]
  );
  const decrypted = await crypto.subtle.decrypt(
    {
      name: "AES-GCM",
      iv: new Uint8Array(encryptedData.iv),
    },
    cryptoKey,
    new Uint8Array(encryptedData.encrypted)
  );
  return decoder.decode(decrypted);
}

// 使用示例
(async () => {
  const secretKey = "my-secret-key";
  const originalText = "Hello, World!";
  const encryptedData = await encrypt(originalText, secretKey);
  console.log("Encrypted:", encryptedData);
  const decryptedText = await decrypt(encryptedData, secretKey);
  console.log("Decrypted:", decryptedText);
})();