Manpages - pam_sm_authenticate.3

pam_sm_authenticate - PAM service function for user authentication

  #include <security/pam_modules.h>

int pam_sm_authenticate(pam_handle_t **/pamh/, int flags, int argc, const char **/argv/);*

The pam_sm_authenticate function is the service modules implementation of the *pam_authenticate*(3) interface.

This function performs the task of authenticating the user.

Valid flags, which may be logically ORd with PAM_SILENT, are:

PAM_SILENT

Do not emit any messages.

PAM_DISALLOW_NULL_AUTHTOK

Return PAM_AUTH_ERR if the database of authentication tokens for this authentication mechanism has a NULL entry for the user. Without this flag, such a NULL token will lead to a success without the user being prompted.

PAM_AUTH_ERR

Authentication failure.

PAM_CRED_INSUFFICIENT

For some reason the application does not have sufficient credentials to authenticate the user.

PAM_AUTHINFO_UNAVAIL

The modules were not able to access the authentication information. This might be due to a network or hardware failure etc.

PAM_SUCCESS

The authentication token was successfully updated.

PAM_USER_UNKNOWN

The supplied username is not known to the authentication service.

PAM_MAXTRIES

One or more of the authentication modules has reached its limit of tries authenticating the user. Do not try again.

*pam*(3), *pam_authenticate*(3), *pam_sm_setcred*(3), *pam_strerror*(3), *PAM*(8)