Ish*_*ain 5 csrf identityserver4 implicit-flow oidc-client-js angular
我的理解是 - oidc-client生成随机数和状态并将其发送到授权服务器(身份服务器 4)。这是用来防止CSRF攻击、重放攻击的。
状态和随机数通过下面的signinredirect()示例示例发送
https://auth.azurewebsites.net/Account/Login?
ReturnUrl=%2Fconnect%2Fauthorize%2Fcallback%3F
client_id%3DLocal%26
redirect_uri%3Dhttp%253A%252F%252Flocalhost%253A4200%252Fauth-callback%252F%26
response_type%3Did_token%2520token%26
scope%3Dopenid%2520profile%2520Api%26
state%3D212ee56661074896aea2b6043d2b8a3f%26
nonce%3D393838b342d543d5910f38cbcab22fa0%26
loginType%3DInternal // my extra params
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问题 1 - 回调后状态未定义
状态添加到回调 URL 中,如下所示
http://localhost:4200/auth-callback#id_token=eyJhbG...
token_type=Bearer
&expires_in=300&
scope=openid%20profile%20Api&
state=155e3e4352814ca48e127547c134144e&
session_state=DPXW-ijMR4ST9iTSxgMwhsLq7aoknEZOnq3aFDooCFg.ifImJurwkwU6M5lwZXCUuw
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状态必须存在于用户中。但就我而言,我在回调方法中看到状态未定义
async completeAuthentication() {
await this.manager
.signinRedirectCallback()
.then(x => {
this.user = x;
this.user.state = x.state; // undefined
this.user.session_state = x.session_state;
})
.catch(errorData => {
const expired = errorData;
});
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问题 -
问题 2 - 随机数
id_token 中收到随机数值
created: 1594171097
extraTokenParams: {}
id: "5cc732d3b7fe4a0abdb371be3bda69a6"
nonce: "17c3f171328b4542a282fcbdd43d6fe4"
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我还看到登录后有 2-4 个 oidc 用户存储在本地存储中。为什么这样?他们具有相同的用户信息,但 ID 和随机数不同。我用户clearstalestate()这些都是在每次新登录或刷新后生成的

问题 -
所以我调试了代码并找到了您的答案的问题,
随机数值是每个会话还是每个用户请求?
这不应该重复,因此它是根据请求生成的,以减轻重放攻击
生成后的随机数值存储在哪里?
存储在会话存储中
oidc 是否在内部验证随机数?在哪里?如果不是我该怎么办?
是的,它在内部验证。您必须查看 oidc-client js。我从那里提取了一些代码以获得清晰的视图,
_validateIdToken(state, response) {
if (!state.nonce) {
Log.error("ResponseValidator._validateIdToken: No nonce on state");
return Promise.reject(new Error("No nonce on state"));
}
let jwt = this._joseUtil.parseJwt(response.id_token);
if (!jwt || !jwt.header || !jwt.payload) {
Log.error("ResponseValidator._validateIdToken: Failed to parse id_token", jwt);
return Promise.reject(new Error("Failed to parse id_token"));
}
if (state.nonce !== jwt.payload.nonce) {
Log.error("ResponseValidator._validateIdToken: Invalid nonce in id_token");
return Promise.reject(new Error("Invalid nonce in id_token"));
}
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}
现在回到状态参数验证。它在 User 对象中不再可用,而是预先在内部进行验证。这是 oidc-client js 的代码摘录
processSigninResponse(url, stateStore) {
Log.debug("OidcClient.processSigninResponse");
var response = new SigninResponse(url);
if (!response.state) {
Log.error("OidcClient.processSigninResponse: No state in response");
return Promise.reject(new Error("No state in response"));
}
stateStore = stateStore || this._stateStore;
return stateStore.remove(response.state).then(storedStateString => {
if (!storedStateString) {
Log.error("OidcClient.processSigninResponse: No matching state found in storage");
throw new Error("No matching state found in storage");
}
let state = SigninState.fromStorageString(storedStateString);
Log.debug("OidcClient.processSigninResponse: Received state from storage; validating response");
return this._validator.validateSigninResponse(state, response);
});
}
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状态和随机数均由 oidc-client 库管理。
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