pam_authenticate man page

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PAM_AUTHENTICATE(3)            Linux-PAM Manual            PAM_AUTHENTICATE(3)



NAME
       pam_authenticate - account authentication

SYNOPSIS
       #include <security/pam_appl.h>

       int pam_authenticate(pam_handle_t *pamh, int flags);

DESCRIPTION
       The pam_authenticate function is used to authenticate the user. The
       user is required to provide an authentication token depending upon the
       authentication service, usually this is a password, but could also be a
       finger print.

       The PAM service module may request that the user enter their username
       vio the the conversation mechanism (see pam_start(3) and pam_conv(3)).
       The name of the authenticated user will be present in the PAM item
       PAM_USER. This item may be recovered with a call to pam_get_item(3).

       The pamh argument is an authentication handle obtained by a prior call
       to pam_start(). The flags argument is the binary or of zero or more of
       the following values:

       PAM_SILENT
          Do not emit any messages.

       PAM_DISALLOW_NULL_AUTHTOK
          The PAM module service should return PAM_AUTH_ERR if the user does
          not have a registered authentication token.

RETURN VALUES
       PAM_ABORT
          The application should exit immediately after calling pam_end(3)
          first.

       PAM_AUTH_ERR
          The user was not authenticated.

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

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

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

       PAM_SUCCESS
          The user was successfully authenticated.

       PAM_USER_UNKNOWN
          User unknown to authentication service.

SEE ALSO
       pam_start(3), pam_setcred(3), pam_chauthtok(3), pam_strerror(3), pam(8)



Linux-PAM Manual                  06/27/2006               PAM_AUTHENTICATE(3)

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