OAuth Authorization code flow
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Күн бұрын🔥More exclusive content: productioncoder.com/you-decid...
Twitter: / _jgoebel
Website: jangoebel.com
Blog: productioncoder.com
00:00 What is the OAuth authorization code flow?
02:54 OAuth authorization code example walkthrough
06:16 exchanging authorization code for an access token
08:38 OAuth CSRF protection with state parameter and PKCE
10:16 OAuth authorization code grant for server side rendered apps
11:15 conclusion
The authorization code flow is a way with which a client ( a third party application) can obtain an access token that provides it limited access to an HTTP service on behalf of a user.
The client initiates the authorization code flow by redirecting the user to the authorization server with client id, state, scopes and a redirect URl as query parameters. There, the user is asked to log into his account and confirm that he wants the third party application to access his account on his behalf. Once approved, the person gets redirected back to the client application with an authorization code in the query parameters. The application can then go and exchange this authorization code for an access token.
If the client is a confidential client, then a client secret is also needed to exchange the authorization code for an access token. Depending on the scopes that the client requested it may also receive a refresh token which allows it get fresh access token in case the current access token has expired.
@jgoebel 3 жыл бұрын
What do you think about this? Please let me know in the comments below.
@nicktacora 2 жыл бұрын
amazing bro!
@jgoebel 2 жыл бұрын
@@nicktacora thx
@OgnyanDimitrov Жыл бұрын
The explanation is clear. Thank you!
@backendbuddy 11 ай бұрын
Bro very nice explanation in detail. Keep it up
@prakashsundra6667 2 жыл бұрын
The details were superb.. you clearly explained the flow. Great job ProductionCoder!
@chrislaneyphotography 2 жыл бұрын
Greatly appreciate this. Explanation of this flow brought it home for me on understanding
@shanerigsby9030 Жыл бұрын
Your approach to explaining this is excellent. Thank you!
@jgoebel Жыл бұрын
Glad you enjoyed it!
@umairyetoo9545 Жыл бұрын
Man, I am a backend dev with 4 yrs of exp. but believe me man I always get lost in this Oauth Grants. I always need to re do all R&D again. But here you explained very well mate, I must say perfectly explained. Kepp it up
@jgoebel Жыл бұрын
thx Umair, I'm glad it helped
@vineetchaurasia7460 Жыл бұрын
One of the greatest content on oauth i ever found on KZfaq, Thanks bud, for this wonderful content
@jgoebel Жыл бұрын
thx, I'm glad you found it useful
@andrebittencourt5512 2 жыл бұрын
This video was incredible!! Thank you for share so much knowledge!
@jgoebel 2 жыл бұрын
thx André, I'm glad you found it useful 👍
@m.k.bearit 7 күн бұрын
thanks! well prepared and informative, made my life much easier :)
@madrag Жыл бұрын
Finally explanation I was looking for, thanks!
@911Neunelfer 2 жыл бұрын
Very understandable, thanks for your efforts!
@jgoebel 2 жыл бұрын
you're welcome Konstantin 👍
@boomboom-9451 Жыл бұрын
Great video, thanks for explaining that way!
@jgoebel Жыл бұрын
thx
@satwikmanitiwari6020 2 жыл бұрын
very nicely explained. great work !!
@jgoebel 2 жыл бұрын
thx Satwik
@feysalmama1800 Жыл бұрын
Amazing explanation!. Thank you for your effort.
@jgoebel Жыл бұрын
Glad you liked it
@VitalikAwesome 3 жыл бұрын
I came here to put like! Everything clear I have no questions Thanks for video
@jgoebel 3 жыл бұрын
Thx Віталік, I'm glad it helped!
@alastairtheduke 5 ай бұрын
Great explanation
@jgoebel 4 ай бұрын
Glad you liked it
@drizztyang9502 Жыл бұрын
Explained so clear!!!
@jgoebel Жыл бұрын
thx
@rodinCodin Жыл бұрын
awesome explanation, thank you, you've got another subscriber!
@jgoebel Жыл бұрын
great, thx Yegor
@user-gp5xz Жыл бұрын
Thanks for this great content.
@jgoebel Жыл бұрын
Thx Mohamed
@supa1009 8 ай бұрын
best explanation on youtube, thank you!
@jgoebel 7 ай бұрын
Glad it was helpful!
@user-mf2po5mf7g 2 жыл бұрын
Good work, thanx a lot!
@jgoebel 2 жыл бұрын
You are welcome!
@kirstinebrrup9656 Ай бұрын
Great video.
@SentinelMoonlight 2 жыл бұрын
All clear)thanks)!
@jgoebel 2 жыл бұрын
Glad it helped!
@brunogiovagnoli3022 Жыл бұрын
Amazing explanation.
@jgoebel Жыл бұрын
Glad you liked it
@Uzair_Anwar2299 2 жыл бұрын
amazing explaination
@jgoebel 2 жыл бұрын
thx
@MAxAMILLIoN757 Жыл бұрын
Can you share a read-only link to that drawio doc? Would be very helpful.
@shubhamrokz12 Жыл бұрын
Agree, this would be very helpful.
@mdamirhossain9376 Жыл бұрын
So far, its seems excellent tutorial to me. I bet, these video should have more like and subs...
@jgoebel Жыл бұрын
Glad it was helpful!
@JedGrant Жыл бұрын
Great video. Would love to watch a follow up with a react app creating or updating a Google Doc.
@entropy1088 11 ай бұрын
Hey, I really love this video especially because it show visually whats going on instead of just tossing jargon around. What wasnt entirely clear though is WHY the code / token exchange is happening. Like, I dont understand how that extra steps adds additional security compared to the implicit flow for example. Any chance you could give me a hint here?
@muralikumara9881 Жыл бұрын
The details are well explained , thank you. Would be helpful if you share the diagram which is referenced in this tutorial.
@siwarhadjali354 Жыл бұрын
thannk youu
@jgoebel Жыл бұрын
You're welcome!
@muzamilshaikh838 9 ай бұрын
our approach to explaining this is excellent❤ and plzz can you give me your explaination sheet
@thereseparish3541 2 жыл бұрын
This was an awesome explanation of grant type authorization code flow. Thank you so much! One question I have is how does this flow work when you have one API that needs authorization to access another API where there is no "user" login involved? For example, I have a Spring REST web service that a vendor cloud app (Dell Boomi app) needs to access. In the past, I've used password grant type, which I know is not best practice. Sorry if this is a basic question.... I'm new to auth code grant type flow.
@jgoebel 2 жыл бұрын
Hi Therese, the authorization code grant is only used with a user together (someone clicks approve on a screen). For server to server communication OAuth2 offers the client credentials flow. Ultimately it is a judgement call. Basic Auth is way simpler to implement because it is just username / password. With OAuth you need an authorization server. So unless you don't already support OAuth, I would rather go with Basic Auth. You might also want to take a look at using JWTs for server to server communication (I have a video series about this). This is probably better in terms of security, but more work to implement. You need to decide if it would be worth doing.
@HappyTest-rr3jq 2 ай бұрын
hey i get that oauth2 is required by third party to access api, example when i say continue with google for the first time it will get my email name profile photo and all, this will help in getting those data and creating user but how login happens with "login with google" button.
@jeno101 Жыл бұрын
We get "redirect uri " two times within your UC diagram .. which is the one actually registered with the server initially ?
@azgharkhan4498 11 ай бұрын
The auth code flow explanation was really great. However the part where you explained about client secret is not very clear. perhaps little more detailed explanation would have helped me
@jgoebel 10 ай бұрын
Think of client id as a username and client secret as a password. OAuth 2.0 also supports stronger means of authentication against the token endpoint such as mTLS or JWT assertions
@marcus-vg8ft 6 ай бұрын
@@jgoebel Absolutely awesome series of videos!! Thank you Jan! -- One question regarding this: Why is important to keep the client_secret as a pw? After all, even if an attacker gets it, it will still need the user to authenticate.
@jgoebel 6 ай бұрын
@@marcus-vg8ft if you have the client secret, then you can impersonate an app. I.e. an attacker could pretend that he is the app for which he has obtained the client secret and get access to the user's data
@marcus-vg8ft 6 ай бұрын
Thanks Jan! If it is for what Google calls "A desktop app" where the user will store the secret on his own computer, is this still risky? I thought with PKCE it should be safe no matter what. @@jgoebel
@jgoebel 6 ай бұрын
@@marcus-vg8ft an attacker could impersonate the app and get access to the user's data on the resource server
@nglara Жыл бұрын
Please help. Is there a sample angular application that implements this? I need to learn it. Thanks!
@KavinChakaravarthi Жыл бұрын
what should be the redirect_url be like. how it was determined ? can you give me the example
@user-gw8qe6nr9m 3 ай бұрын
wow...
@anushkashrivastava9035 11 ай бұрын
I love fight club too XD
@jgoebel 9 ай бұрын
best movie ever
@baustin612 7 ай бұрын
is the diagram shown in the video available anywhere?
@kemalgenc7117 10 ай бұрын
Thank you for a detailed explanation. My question is how the resource server validates the access token? We need a call from resource server to auth server in order to validate right? Do we have a standart for this communication?
@jgoebel 9 ай бұрын
I explained it here: kzfaq.info/get/bejne/p5l2nNiFv9LWn3k.htmlsi=Vp_lWURCU0-HbG2Q&t=404 Either via a call to the authorization server or - if the token is structured (e.g. a JWT), then by validating the token's signature with a public key
@DMoots Жыл бұрын
Thanks for the video this has been very helpful for me. I've one question I hope you can answer for me. Once I've passed authentication and have received the token back on the client, and then the client makes a request to the RESOURCE server. Does the resource server need to check the token against the auth server with every request?
@jgoebel Жыл бұрын
Most servies use structured tokens, i.e. JWTs, so you can validate the token without making a REST call to the authorization server. There are a few edge cases you could run into however, .e.g if a token is revoked you might accept it on your service. Therefore, for critical actions like purchasing sth. you can use token introspection endpoint of the authorization server where you can have a token validated
@DMoots Жыл бұрын
@@jgoebel thanks for the explanation 👍
@pradyun679 Жыл бұрын
Can you please share the drawing? It would be really helpful.
@ralphanthonyplanteras6246 9 ай бұрын
how can you get the code from the authorization? automatically, noy by copying it from the browser?
@jgoebel 5 ай бұрын
you can access the browser's URL and get the code from the query parameters
@divyeshkumarbalar7732 5 ай бұрын
did you said, authorization code flow clients does not need a secret? Dont we need the secret to exchange the code for access token?
@divyeshkumarbalar7732 5 ай бұрын
sorry commented too early before watching the whole video
@ThoDaGeEtKuDunGi 2 жыл бұрын
how do i take code and state parameter to the backend in python
@jgoebel 2 жыл бұрын
you would make a REST call to your backend
@memester3199 Жыл бұрын
It has given me an authorization code, but where do I paste the code in?
@jgoebel Жыл бұрын
the authoriztion code is sent to the token endpoint of the authorization server to obtain an access and / or refresh token.
@critical5555 Жыл бұрын
So server side rendered apps don't use a state parameter because using a client secret makes it secure enough already? Also, if anyone has any resources explained how to decide what the redirect URL should be, please link (I am new to this and I suspect it may be obvious to many)
@chechochimes 2 жыл бұрын
Thanks for this! Right now I need implement an app that create some google-calendar events but for a ServiceAccount. I saw many examples in docs that creates/uses AuthorizationCodeInstalledApp (or similar) to create a 'credential' instance (com.google.api.client.auth.oauth2.Credential) but it works for regular user accounts and not for ServiceAccount (I already have the JSON file with key info from my ServiceAccount) . Do you know where I can find some examples for what i'm looking for? Something like this: final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport(); JsonFactory jsonFactory = GsonFactory.getDefaultInstance(); GoogleCredentials credential = GoogleCredentials.fromStream(new FileInputStream(jsonPath)) .createScoped(Collections.singleton(CalendarScopes.CALENDAR)); Calendar calendar = new Calendar.Builder(HTTP_TRANSPORT, jsonFactory, credential) .setApplicationName(APPLICATION_NAME) .build(); (this example isn't working because Calendar.Builder needs some Credential obj as a third param)
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