[AZ-556] [AZ-557] Unify login errors + share MFA lockout pipeline

AZ-556 collapses every /login rejection (unknown email, wrong password,
disabled account, lockout, per-account rate limit) to a single opaque
InvalidCredentials (70) → 401 response. Timing equalised by a new
Security.VerifyDummy using the same Argon2id parameters. Audit log keeps
the rejection category internally (login_failed_unknown_email,
login_failed_disabled).

AZ-557 wires /login/mfa into the existing per-account lockout +
rate-limit pipeline. MFA failures now feed UserService's shared failure
accounting (RegisterMfaFailedLogin → RegisterFailedLoginCore) and
CountRecentFailedLogins aggregates both login_failed and
mfa_login_failed rows. Successful TOTP / recovery resets the counter.

Deprecated five legacy ExceptionEnum members (NoEmailFound,
WrongPassword, UserDisabled, AccountLocked, LoginRateLimited) — kept
defined for cross-workspace verifier compatibility during the
deprecation window.

E2E coverage updated: AuthTests (byte-identical body assertion +
disabled-account audit row), LoginRateLimitTests, PasswordHashingTests,
SecurityTests, plus four new MfaLoginTests (AC1, AC2, AC5, AC7).

Code review verdict: PASS_WITH_WARNINGS (batch_06_cycle2_review.md).

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
Oleksandr Bezdieniezhnykh
2026-05-14 09:56:00 +03:00
parent ebde2b2d25
commit 4bf2e689cb
16 changed files with 537 additions and 100 deletions
+6 -3
View File
@@ -182,11 +182,14 @@ public sealed class SecurityTests
// Act
using var login = await client.PostAsync("/login", new { email, password });
// Assert
login.StatusCode.Should().Be(HttpStatusCode.Conflict);
// Assert — AZ-556 unified the disabled-account response with the wrong-
// password response. The indistinguishability check (byte-for-byte body
// equality + audit-log granularity) lives in AuthTests
// `Login_with_disabled_account_returns_401_invalid_credentials_indistinguishable_from_wrong_password`.
login.StatusCode.Should().Be(HttpStatusCode.Unauthorized);
var err = await login.Content.ReadFromJsonAsync<ErrorResponse>(ResponseJsonOptions);
err.Should().NotBeNull();
err!.ErrorCode.Should().Be(38);
err!.ErrorCode.Should().Be(70, "InvalidCredentials == 70 (AZ-556)");
}
finally
{