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PAM_AUTHENTICATE(3)        Library Functions Manual        PAM_AUTHENTICATE(3)

NAME
     pam_authenticate - perform authentication within the PAM framework

SYNOPSIS
     #include <sys/types.h>
     #include <security/pam_appl.h>

     int
     pam_authenticate(pam_handle_t *pamh, int flags);

DESCRIPTION
     The pam_authenticate() function attempts to authenticate the user
     associated with the pam context specified by the pamh argument.

     The application is free to call pam_authenticate() as many times as it
     wishes, but some modules may maintain an internal retry counter and
     return PAM_MAXTRIES when it exceeds some preset or hardcoded limit.

     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
                         Fail if the user's authentication token is null.

     If any other bits are set, pam_authenticate() will return
     PAM_BAD_CONSTANT.

RETURN VALUES
     The pam_authenticate() function returns one of the following values:

     [PAM_SUCCESS]       Success.

     [PAM_ABORT]         General failure.

     [PAM_AUTHINFO_UNAVAIL]
                         Authentication information is unavailable.

     [PAM_AUTH_ERR]      Authentication error.

     [PAM_BAD_CONSTANT]  Bad constant.

     [PAM_BUF_ERR]       Memory buffer error.

     [PAM_CONV_ERR]      Conversation failure.

     [PAM_CRED_INSUFFICIENT]
                         Insufficient credentials.

     [PAM_MAXTRIES]      Maximum number of tries exceeded.

     [PAM_PERM_DENIED]   Permission denied.

     [PAM_SERVICE_ERR]   Error in service module.

     [PAM_SYSTEM_ERR]    System error.

     [PAM_USER_UNKNOWN]  Unknown user.

SEE ALSO
     pam(3), pam_strerror(3)

STANDARDS
     X/Open Single Sign-On Service (XSSO) - Pluggable Authentication Modules,
     June 1997.

AUTHORS
     The pam_authenticate() function and this manual page were developed for
     the FreeBSD Project by ThinkSec AS and Network Associates Laboratories,
     the Security Research Division of Network Associates, Inc. under
     DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
     CHATS research program.

     The OpenPAM library is maintained by Dag-Erling Sm/orgrav <des@des.no>.

NetBSD 10.99                     June 27, 2023                    NetBSD 10.99