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PAM_AUTHENTICATE(3)	 BSD Library Functions Manual	   PAM_AUTHENTICATE(3)

NAME
     pam_authenticate -- perform authentication	within the PAM framework

LIBRARY
     Pluggable Authentication Module Library (libpam, -lpam)

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 associ-
     ated 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 re-
     turn PAM_MAXTRIES when it exceeds some preset or hardcoded	limit.

     The flags argument	is the binary or of zero or more of the	following val-
     ues:

     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_SYMBOL_ERR.

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

     [PAM_ABORT]	 General failure.

     [PAM_AUTHINFO_UNAVAIL]
			 Authentication	information is unavailable.

     [PAM_AUTH_ERR]	 Authentication	error.

     [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_SYMBOL_ERR]	 Invalid symbol.

     [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.

BSD			       December	21, 2007			   BSD

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | STANDARDS | AUTHORS

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