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Chris Lu
e64c821139
* s3: stop collapsing account-less identities into the admin account Identities configured without an account block all defaulted to the shared admin account, so distinct users got the same owner id and ownership checks could not tell them apart. checkAccessByOwnership also treated that id as an admin bypass, so any account-less caller passed ownership for any bucket. Give such identities a distinct account id from their name, and decide the ownership admin bypass by Admin capability rather than by the account id. isUserAdmin is now nil-safe. * s3: use the context identity in isUserAdmin before re-authenticating The Auth middleware already verifies and stores the identity in the request context. Read it there first so the ownership/admin checks don't re-run signature verification, which is redundant and fails once the request body has been consumed. * s3: nil-guard the context identity in isUserAdmin A non-nil interface wrapping a typed-nil *Identity passes the type assertion; guard against it before calling isAdmin(). * s3: trim verbose comments