"prompt" parameter not set correctly during authentication

The MSAL for Android allows to provide a Prompt parameter during interactive token requests by using SingleAccountPublicClientApplication.signIn or by providing AcquireTokenParameters. Possible Prompt parameters are: [SELECT_ACCOUNT, LOGIN, CONSENT, WHEN_REQUIRED]. As per documentation of the MSAL for Android’s code those should map to their OIDC specification counterparts: [select_account, login, consent, none].

Of those mentioned prompt parameters, all seem to work as expected, except for the WHEN_REQUIRED Prompt. The javadoc states the following:

/**
 * acquireToken will not send the prompt parameter to the authorize endpoint.  The user may be prompted to login or to consent as required by the request.
 */

After a Prompt WHEN_REQUIRED is supplied it is later overridden by the MSAL when creating the InteractiveTokenCommandParameters in the CommandParametersAdapter.createInteractiveTokenCommandParameters method using the following code segment:

private static OpenIdConnectPromptParameter getPromptParameter(@NonNull final AcquireTokenParameters parameters) {
    if (parameters.getPrompt() == null || parameters.getPrompt() == Prompt.WHEN_REQUIRED) {
        return OpenIdConnectPromptParameter.SELECT_ACCOUNT;
    } else {
        return parameters.getPrompt().toOpenIdConnectPromptParameter();
    }
}

It seems there is no option to provide the OIDC specification’s prompt=none parameter and therefore there is no way of performing an authentication without the need for the user to input their credentials during login, even though there might be a valid session provided by the browser. You can also observe the set prompt parameter by inspecting the resulting authentication url opened in the Browser/CustomTab.

In fact, even when fixing the above code segment the Prompt.toOpenIdConnectPromptParameter() method never results in an OpenIdConnectPromptParameter.NONE parameter since it seems to not support a Prompt.WHEN_REQUIRED.

MSAL Version: 1.6.0

[kreedula]

Thank you for reporting this. I have added a backlog item to fix or infact see if we can add support for prompt = none

[tanmaymanolkar1]

Closing this issue, since fix has been rolled out. the following library versions have the fix The Msal version : 2.0.1 The common version : 3.0.2