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ViewsCognito logout does not work as documented
I have a Cognito user pool configured with a SAML identity provider (ADFS) and I'm able to sign it as a federated user (AD) but sign out does not work.
Following the documentation, I make a GET request to https://my-domain.auth.us-west-2.amazoncognito.com/logout?client_id=63...ng&logout_uri=http:%2F%2Fyahoo.com (using some public logout uri), from my client (an AngularJS 1.x app), and I get back a 302 with a Location header like
https://my-domain.auth.us-west-2.amazoncognito.com/login?client_id=63...ng&logout_uri=http:%2F%2Fyahoo.com
(In fact there I see 2 requests like the above).
When I log back in (thru ADFS) it does not prompt for my AD credentials, i.e. seems that I'm not logged out.
My user pool is configured as described here (see step 7), where the Enable IdP sign out flow is checked, which is supposed to log the user out from ADFS as well.
Any suggestions? Thanks.
General
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Request URL: https://my-domain.auth.us-west-2.amazoncognito.com/logout?client_id=63...ng&logout_uri=http:%2F%2Fyahoo.com
Request Method: GET
Status Code: 302
Remote Address: 54.69.30.36:443
Referrer Policy: no-referrer-when-downgrade
Response Headers
----------------
cache-control: private
content-length: 0
date: Fri, 20 Apr 2018 21:31:12 GMT
expires: Thu, 01 Jan 1970 00:00:00 UTC
location: https://my-domain.auth.us-west-2.amazoncognito.com/login?client_id=63...ng&logout_uri=http:%2F%2Fyahoo.com
server: Server
set-cookie: XSRF-TOKEN=...; Path=/; Secure; HttpOnly
set-cookie: XSRF-TOKEN=""; Expires=Thu, 01-Jan-1970 00:00:10 GMT; Path=/; Secure; HttpOnly
status: 302
strict-transport-security: max-age=31536000 ; includeSubDomains
x-content-type-options: nosniff
x-frame-options: DENY
x-xss-protection: 1; mode=block
Request Headers
---------------
:authority: my-domain.auth.us-west-2.amazoncognito.com
:method: GET
:path: /logout?client_id=63...ng&logout_uri=http:%2F%2Fyahoo.com
:scheme: https
accept: application/json, text/plain, */*
accept-encoding: gzip, deflate, br
accept-language: en-US,en;q=0.9
authorization: Bearer eyJra...
cache-control: no-cache
origin: https://localhost:8443
pragma: no-cache
referer: https://localhost:8443/logout
user-agent: Mozilla/5.0...
3 answers
Answer question0
This redirect happens whenever logout_uri parameter doesn't match exactly what's listed among Sign out URL(s) in AWS Cognito User Pools App client settings configuration.
Cognito allows logout with either logout_uri or with the same arguments as login (i.e. redirect_uri and response_type) to log out and take the user back to the login screen. It seems that whenever logout_uri is invalid, it assume the re-login flow, does this redirect, and then reports an error about missing login arguments.
As for SAML, I don't know, but guessing that it doesn't work because there was actually an error, just not properly reported.
0
The /logout endpoint signs the user out.It only supports HTTPS GET. It is working
Sample Requests - Logout and Redirect Back to Client
It clears out the existing session and redirects back to the client. Both parameters are required.
GET https://<YOUR DOMAIN NAME>/logout?
client_id=xxxxxxxxxxxx&
logout_uri=com.myclientapp://myclient/logout
Also make sure that Logout URL is same as SIGNOUT URL in AWS Cognito APP too.
for more information, refer AWS LOGOUT Endpoint
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From documentation here
https://docs.aws.amazon.com/cognito/latest/developerguide/logout-endpoint.html
If you want
And your login url is like
"https://xxxx.auth.eu-west-1.amazoncognito.com/login?client_id=1234&response_type=token&scope=aws.cognito.signin.user.admin+email+openid+phone+profile&redirect_uri=http://localhost:3000/"
Then your logout url is like
"https://xxxx.auth.eu-west-1.amazoncognito.com/logout?client_id=1234&logout_uri=http://localhost:3000/";
Note the difference
- login > login? and redirect_uri
- logout > logout? and logout_uri
Those redirect / logout uri must match what you have configured inside Cognito.
If you don't do it right, you may get strange errors like
error=unauthorized_client
or
Required String parameter 'response_type' is not present
and who knows what else. :o)