const jwt = require('jsonwebtoken')
// 對稱加密
const key = 'hello'
const token = jwt.sign({
username: 'xiaoming'
}, key)
console.log(token);
jwt.verify(token, 'hello',(err,decoded)=>{
if (!err) {
console.log(decoded.username);
}
})
// 非對稱加密
// 用私鑰加密，用公鑰解密
// 生成私鑰
ssh-keygen -t rsa -b 2048 -f private.key
ssh-keygen -t rsa -b 2048 -f rsa_private_key.pem
// 生成公鑰
openssl rsa -in private.key -pubout -outform PEM -out public.key
openssl rsa -in rsa_private_key.pem -pubout -out rsa_public_key.pem