Fix PasskeySignInAsync to enforce email/phone confirmation and lockout checks

[Copilot]

Fix PasskeySignInAsync to enforce email/phone confirmation and lockout checks

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Fix PasskeySignInAsync bypassing RequireConfirmedEmail, RequireConfirmedPhoneNumber, and lockout

Description

PasskeySignInAsync() was not calling PreSignInCheck() before signing in users, allowing authentication to succeed even when:

• RequireConfirmedEmail = true and email is unconfirmed
• RequireConfirmedPhoneNumber = true and phone is unconfirmed
• User is locked out

This is inconsistent with PasswordSignInAsync() and other sign-in methods that properly enforce these requirements.

Changes:

• SignInManager.PasskeySignInCoreAsync: Added PreSignInCheck() call after successful passkey assertion, before updating passkey metadata. Returns SignInResult.NotAllowed or SignInResult.LockedOut when requirements aren't met.

• Tests: Added CanRequireConfirmedEmailForPasskeySignIn, CanRequireConfirmedPhoneNumberForPasskeySignIn, and PasskeySignInReturnsLockedOutWhenLockedOut to verify enforcement.

Original prompt

Problem

SignInManager<TUser>.PasskeySignInAsync() does not call PreSignInCheck() before signing in the user, which means it bypasses sign-in requirements like RequireConfirmedEmail, RequireConfirmedPhoneNumber, and lockout checks. This is inconsistent with PasswordSignInAsync() which correctly enforces these requirements.

Reference Issue: #65020

Current Behavior

Looking at PasskeySignInCoreAsync in src/Identity/Core/src/SignInManager.cs:

private async Task<SignInResult> PasskeySignInCoreAsync(string credentialJson)
{
    ArgumentException.ThrowIfNullOrEmpty(credentialJson);

    var assertionResult = await PerformPasskeyAssertionAsync(credentialJson);
    if (!assertionResult.Succeeded)
    {
        return SignInResult.Failed;
    }

    // After a successful assertion, we need to update the passkey so that it has the latest
    // sign count and authenticator data.
    var setPasskeyResult = await UserManager.AddOrUpdatePasskeyAsync(assertionResult.User, assertionResult.Passkey);
    if (!setPasskeyResult.Succeeded)
    {
        return SignInResult.Failed;
    }

    return await SignInOrTwoFactorAsync(assertionResult.User, isPersistent: false, bypassTwoFactor: true);
}

The method directly proceeds to SignInOrTwoFactorAsync without calling PreSignInCheck().

Expected Behavior

PasskeySignInAsync() should call PreSignInCheck() after successful passkey assertion (but before signing in) to enforce:

• RequireConfirmedEmail - returns SignInResult.NotAllowed if email is not confirmed
• RequireConfirmedPhoneNumber - returns SignInResult.NotAllowed if phone is not confirmed
• User lockout - returns SignInResult.LockedOut if user is locked out

Required Changes

1. Modify PasskeySignInCoreAsync in src/Identity/Core/src/SignInManager.cs

Add a call to PreSignInCheck() after successful passkey assertion, similar to how TwoFactorAuthenticatorSignInCoreAsync and TwoFactorSignInCoreAsync do it:

private async Task<SignInResult> PasskeySignInCoreAsync(string credentialJson)
{
    ArgumentException.ThrowIfNullOrEmpty(credentialJson);

    var assertionResult = await PerformPasskeyAssertionAsync(credentialJson);
    if (!assertionResult.Succeeded)
    {
        return SignInResult.Failed;
    }

    // Check pre-sign-in requirements (email confirmation, phone confirmation, lockout)
    var error = await PreSignInCheck(assertionResult.User);
    if (error != null)
    {
        return error;
    }

    // After a successful assertion, we need to update the passkey so that it has the latest
    // sign count and authenticator data.
    var setPasskeyResult = await UserManager.AddOrUpdatePasskeyAsync(assertionResult.User, assertionResult.Passkey);
    if (!setPasskeyResult.Succeeded)
    {
        return SignInResult.Failed;
    }

    return await SignInOrTwoFactorAsync(assertionResult.User, isPersistent: false, bypassTwoFactor: true);
}

2. Add unit tests in src/Identity/test/Identity.Test/SignInManagerTest.cs

Add the following test methods that mirror the existing password sign-in tests:

Test 1: CanRequireConfirmedEmailForPasskeySignIn

Similar to CanRequireConfirmedEmailForPasswordSignIn, this test should verify that when RequireConfirmedEmail = true:

• If email is NOT confirmed → PasskeySignInAsync returns SignInResult.NotAllowed
• If email IS confirmed → PasskeySignInAsync returns SignInResult.Success

Test 2: CanRequireConfirmedPhoneNumberForPasskeySignIn

Similar to CanRequireConfirmedPhoneNumberForPasswordSignIn, this test should verify that when RequireConfirmedPhoneNumber = true:

• If phone is NOT confirmed → PasskeySignInAsync returns SignInResult.NotAllowed
• If phone IS confirmed → PasskeySignInAsync returns SignInResult.Success

Test 3: PasskeySignInReturnsLockedOutWhenLockedOut

Similar to PasswordSignInReturnsLockedOutWhenLockedOut, this test should verify that:

• If user is locked out → PasskeySignInAsync returns SignInResult.LockedOut

For reference, the existing CanPasskeySignIn test in the same file shows how to set up passkey sign-in tests with mocked IPasskeyHandler. Use similar setup patterns for the new tests.

This pull request was created from Copilot chat.

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Pull request overview

This PR fixes a security vulnerability where PasskeySignInAsync() was bypassing important sign-in requirements (email confirmation, phone confirmation, and lockout checks) that are properly enforced by other sign-in methods like PasswordSignInAsync().

Changes:

• Added PreSignInCheck() call in PasskeySignInCoreAsync to enforce email/phone confirmation and lockout requirements before signing in
• Added three comprehensive unit tests to verify the fix works correctly for all three scenarios (email confirmation, phone confirmation, and lockout)

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/Identity/Core/src/SignInManager.cs	Added PreSignInCheck() call after successful passkey assertion to enforce sign-in requirements
src/Identity/test/Identity.Test/SignInManagerTest.cs	Added three tests to verify email confirmation, phone confirmation, and lockout checks work with passkey sign-in

[MackinnonBuck]

/azp run

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Azure Pipelines successfully started running 2 pipeline(s).

[halter73]

I assume we're going to backport this to release/10.0?