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Man Pages


Manual Reference Pages  -  PAM_AUTHENTICATE (3)

NAME

pam_authenticate - perform authentication within the PAM framework

CONTENTS

Library
Synopsis
Description
Return Values
See Also
Standards
Authors

LIBRARY


.Lb libpam

SYNOPSIS


.In sys/types.h
.In 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_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


.Rs X/Open Single Sign-On Service (XSSO) - Pluggable Authentication Modules
.Re

AUTHORS

The pam_authenticate function and this manual page were developed for the
.Fx 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
.An Dag-Erling Sm\(/orgrav Aq des@des.no .

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