OPIE Authentication Module

The OPIE authentication component provides functions to verify the identity of a user (pam_sm_authenticate()), which obtains the relevant opie(4) credentials. It provides the user with an OPIE challenge, and verifies that this is correct with opiechallenge(3).

The following options may be passed to the authentication module:

debug

syslog(3) debugging information at LOG_DEBUG level.

auth_as_self

This option will require the user to authenticate himself as the user given by getlogin(2), not as the account they are attempting to access. This is primarily for services like su(1), where the user's ability to retype their own password might be deemed sufficient.

no_fake_prompts

Do not generate fake challenges for users who do not have an OPIE key. Note that this can leak information to a hypothetical attacker about who uses OPIE and who does not, but it can be useful on systems where some users want to use OPIE but most do not.

Note that pam_opie ignores the standard options try_first_pass and use_first_pass, since a challenge must be generated before the user can submit a valid response.