如何在NodeJS中使用公钥仅加密JSON负载的选定值

Question

样本有效载荷：

"object": {
"a": "bau bau",
"c": "boo boo",
"e": "mrau mrau"
},

加密有效载荷：

"object": {
"a": "kjdfhsijry874rhevfbwe",
"c": "boo boo",
"e": "vcsafsdkhdlksfhj23273"
},

我已经创建了以下脚本，但在传递字符串时却出现了错误。错误：类型错误：第一个参数必须是字符串、Buffer、ArrayBuffer、Array或类似数组的对象

const crypto = require('crypto');
const path = require('path');
const fs = require('fs');
const payload = require('./payload.json');
console.log("original:", payload);
const encrypted = encryptedJSON(payload, './public.pem', ["a", "e"]);
console.log("encrypted:", encrypted);
function encryptedJSON(obj, key, propertiesToEncrypt) {
let result = { ...obj }; // Clone the object.
const publicKey = fs.readFileSync(path.resolve(key), "utf8");
for(let property of propertiesToEncrypt) {
result[property] = crypto.publicEncrypt({ key: publicKey }, Buffer.from(obj[property], "utf8")).toString("base64");
}
return result;
}

Answer 1

您的代码对于payload.json:的这种格式是正确的

{
"a": "bau bau",
"c": "boo boo",
"e": "mrau mrau"
}

但这次会失败：

{
"object": {
"a": "bau bau",
"c": "boo boo",
"e": "mrau mrau"
}
}

因为它试图加密不存在的顶级属性"a"(唯一的属性是"object"(。如果你的有效载荷遵循后一种格式，你可以这样调整你的代码：

const encrypted = encryptedJSON(payload.object, './public.pem', ["a", "e"]);