在线合同签的效力

// 使用Web Crypto API生成密钥对
async function generateKeyPair() {
  const keyPair = await window.crypto.subtle.generateKey(
    {
      name: "RSA-OAEP",
      modulusLength: 2048,
      publicExponent: new Uint8Array([1, 0, 1]),
      hash: "SHA-256",
    },
    true,
    ["encrypt", "decrypt"]
  );
  return keyPair;
}

// 使用公钥加密数据
async function encryptData(publicKey, data) {
  const encodedData = new TextEncoder().encode(data);
  const encryptedData = await window.crypto.subtle.encrypt(
    {
      name: "RSA-OAEP",
    },
    publicKey,
    encodedData
  );
  return encryptedData;
}

// 示例：签署合同
async function signContract(contractText) {
  const keyPair = await generateKeyPair();
  const encryptedContract = await encryptData(keyPair.publicKey, contractText);
  
  // 将加密后的合同和公钥发送到服务器进行存储和验证
  const response = await fetch('/api/signContract', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({
      encryptedContract: Array.from(new Uint8Array(encryptedContract)),
      publicKey: Array.from(new Uint8Array(await window.crypto.subtle.exportKey("spki", keyPair.publicKey)))
    })
  });
  
  return response.json();
}