Hashing is only used to test if an entered password matches a stored one (without actually storing the password). It's no good if you need to retrieve the passw

Hashing is only used to test if an entered password matches a stored one (without actually storing the password). It's no good if you need to retrieve the password to use later (which Keychain does). This isn't a hole, and if anything, speaks to the quality of work that Apple's engineers did on Keychain.