For Microsoft OAuth 2.0 auth code grant, we have encountered an issue with scopes.
When we requestion only the User.Read scope, our client is asked to grant permission to us for Sign you in and read your profile and Access your data anytime. Where we didn't state we need offline_access scope.
This is only happening after Microsoft switched to new permission grant interface. Have someone else encounter the same issue or we did something wrong?
The response_type we pass in is code only.
I have double checked, the application we registered is under https://apps.dev.microsoft.com.
The URL we use for authorizing is following.
https://login.microsoftonline.com/common/oauth2/v2.0/authorize
As I said earlier, the only scope we pass in through query was User.Read.
Edit 3
Request URL: (I have removed client id.)
https://login.microsoftonline.com:443/common/oauth2/v2.0/authorize?client_id={client_id}&response_type=code&redirect_uri=http%3A%2F%2Flocalhost%3A19974%2Fapi%2Fv1%2Fmicrosoft%2Foauth2%2Fsession&response_mode=form_post&scope=User.Read&state=1527572151-IIZ0D&nonce=1527572151-IIZ0D&prompt=consent&domain_hint=organizations
Response that logged with fiddler:
POST http://localhost:19974/api/v1/microsoft/oauth2/session HTTP/1.1
Host: localhost:19974
Connection: keep-alive
Content-Length: 798
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: null
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,/;q=0.8
Accept-Encoding: gzip, deflate, br
Accept-Language: en,en-NZ;q=0.9,zh-TW;q=0.8,zh;q=0.7,zh-CN;q=0.6
DNT: 1
code=OAQABAAIAAADX8GCi6Js6SK82TsD2Pb7rUmGhJoHUB3devvTffqTlhRhg9XZ202zgEA8B37CzgkeLNVBc4FFstw3sTjNmYhKCYLE_jcl7KeCrtYgPVFYOKUuazv_B3vHKIM8ttwIzOlV_3GL4vqxPgjvXbWUdas5Sj9Z1X9fEBB63Wa1Ig0AnisnHk6qagIimFEPApYx473RzgIve2erM3r5fnX5Q0L1-pHppSFUJoWop6MPTkUh-umPzuXQgB280rHyUds3odS6_cJP6SbI70aLNOqHV_AnaV_VUZqQ6hLfBZMVKFMYMg_r_harPOU5EE2gf2d15FIKMsmjPRTR2vryaJRyg0TblF_jr-kWyeURwpbkPzsU6r3avEqM6dfTqhhASoXB4VmeZ2zw75pZgK4v8cfcd3J_tIpFRjcEY1TqPz5E3QrYQGfFSeBEEbjwqvj2X5_4VBvve7ABdrt3OCjid8E_837mLX-Fv5t3nk_nfnV0SY6XrFQQmoPClyqSyn44FTv_WFY7Af74SfeBrWDYSSiTuwphEmVTeT6U2R4Rs4wR8G0uHW2L53U-4UbkODd-_-JZYIahAohDAF-8TaguUwb4mOK497wsFOkgpmYz-np4MX3sTweSLmn6bAOy9Y91E3o4fuERzX9m9N_HBt64cv6k8JROKJqs6cx1Gb9EoYCRLCn2ihWi_crZh2PH5LACMCLWYgH0gAA&state=1527572151-IIZ0D&session_state=1faeaab9-0f00-45cb-a776-356463a54684
Edit 4
Today, I have done few more testing while upgrading project to .Net Core 2.1. I have notice that even though from interface it is confirming Access your data anytime, but when I use code to exchange access token, it doesn't contain refresh token.
The other thing I have notice is, when I pass scope as User.Read, and when I exchange access token, the scope came back as: User.Read User.ReadBasic.All. This is a bit of inconsistent, but not big issue.
It’s not currently possible to remove the offline_access scope from the initial consent screen when using the v2 endpoint with an AAD account. When requesting tokens the offline_access scope is still explicitly requested though.
This is an issue which is in a planned state on Azure Active Directory suggestions and feedback site.
Admin's post (Oct 2, 2018) mentions a plan to fix this "within the next 3 months".
Cuase:
For v1 endpoint, the scope isstatically configured in AAD App registration. If you have add access user's data anytime permission, you will also get the offline_access scope in your request.
Solution:
If you don't want to let user have offline_access permission, you can unpick up the Access user's data anytime permission in Microsoft Graph delegated permissions.
More about offline_access :
offline_access is one of OpenID permissions. It's name is offline_access and it's Display String in v1 endpoint is Access user's data anytime.You can see more details about this permission in this documentation.
来源：https://stackoverflow.com/questions/50476455/azure-ad-automatically-added-offline-access