4.6 node js加密

const fs=require('fs');
const crypto=require('crypto');
const privateKey=fs.readFileSync('8000013189_pri.pem','utf-8');
console.log(privateKey);
function encrypt(stuff) {
    let encryptString = Buffer.from(Buffer.from(stuff).toString('base64'));
    let result ='';
    while (encryptString.length > 117) {
        const chunk = encryptString.slice(0, 117);
        encryptString = encryptString.slice(117);
        result += crypto.privateEncrypt(privateKey, chunk).toString('hex');
    }
    result += crypto.privateEncrypt(privateKey, encryptString).toString('hex');
    return result;
}
console.log(encrypt("123456"));