NAME
pam_sm_authenticate - PAM service function for user authenticationSYNOPSIS
#include <security/pam_modules.h>
int
pam_sm_authenticate(pam_handle_t *pamh,
int flags, int argc,
const char **argv);
DESCRIPTION
The pam_sm_authenticate function is the service module's implementation of the pam_authenticate(3) interface. This function performs the task of authenticating the user. Valid flags, which may be logically OR'd with PAM_SILENT, are: PAM_SILENTDo 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.
RETURN VALUES
PAM_AUTH_ERRAuthentication 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.
SEE ALSO
pam(3), pam_authenticate(3), pam_sm_setcred(3), pam_strerror(3), PAM(8)09/03/2021 | Linux-PAM Manual |