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服务端要做的其实很简单

nodejs需要装三个东西

npm install node-rsa

npm install axios

npm install jsonwebtoken

提供一个接口让客户端上传他那边获取到的identity

当客户端通过请求你提供的接口时，服务端可以使用axios请求这个接口 https://appleid.apple.com/auth/keys

，直接调用便会获取到一个 JWK，获取到的信息如下

{

"keys": [

{

"kty": "RSA",

"kid": "AIDOPK1",

"use": "sig",

"alg": "RS256",

"n": "lxrwmuYSAsTfn-lUu4goZSXBD9ackM9OJuwUVQHmbZo6GW4Fu_auUdN5zI7Y1dEDfgt7m7QXWbHuMD01HLnD4eRtY-RNwCWdjNfEaY_esUPY3OVMrNDI15Ns13xspWS3q-13kdGv9jHI28P87RvMpjz_JCpQ5IM44oSyRnYtVJO-320SB8E2Bw92pmrenbp67KRUzTEVfGU4-obP5RZ09OxvCr1io4KJvEOjDJuuoClF66AT72WymtoMdwzUmhINjR0XSqK6H0MdWsjw7ysyd_JhmqX5CAaT9Pgi0J8lU_pcl215oANqjy7Ob-VMhug9eGyxAWVfu_1u6QJKePlE-w",

"e": "AQAB"

}

]

}

我们要通过上面的keys里面的第一个对象去获取 Public Key,这里需要解码才能得到 Public Key，可以使用 node-rsa

let res = await axios.request({

method: "GET",

url: "https://appleid.apple.com/auth/keys",

})

let key = res.data.keys[0]

const pubKey = new NodeRSA();

pubKey.importKey({ n: Buffer.from(key.n, 'base64'), e: Buffer.from(key.e, 'base64') }, 'components-public');

let data = {publicKey: pubKey.exportKey(['public']), alg: key.alg}

然后使用 jsonwebtoken 解码获取用户信息

let payload = jwt.decode(identity,data.publicKey,data.alg)

打印 payload 会得到以下信息，sub就是用户的唯一标示

{

"iss": "https://appleid.apple.com",

"aud": "这个对应app的bundleid",

"exp": 1567494694,

"iat": 1567494094,

"sub": "这个字段和手机端获取的user信息相同",

"c_hash": "nRYP2wGXBGT0bIYWibx4Yg",

"auth_time": 1567494094

}

但是是需要验证的

jwt.verify(identity,data.publicKey,(error,decoded)=>{

payload = decoded;

});

服务端整体代码

router.get('/auth', async ctx => {

var data = await getPublicKey()

let identity = ctx.query.identity

//解码获得用户信息

~~ let payload = jwt.decode(identity,data.publicKey,data.alg)~~

jwt.verify(identity,data.publicKey,(error,decoded)=>{

payload = decoded;

console.log(payload)

});

})

async function getPublicKey() {

let res = await axios.request({

method: "GET",

url: "https://appleid.apple.com/auth/keys",

})

let key = res.data.keys[0]

const pubKey = new NodeRSA();

pubKey.importKey({ n: Buffer.from(key.n, 'base64'), e: Buffer.from(key.e, 'base64') }, 'components-public');

let data = {publicKey: pubKey.exportKey(['public']), alg: key.alg}

return data;

}