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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | COLOPHON |
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PAM_AUTHENTICATE(3) Linux-PAM Manual PAM_AUTHENTICATE(3)
pam_authenticate - account authentication
#include <security/pam_appl.h>
int pam_authenticate(pam_handle_t *pamh, int flags);
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 via 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.
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_UNAVAIL
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.
pam_start(3), pam_setcred(3), pam_chauthtok(3), pam_strerror(3),
pam(8)
This page is part of the linux-pam (Pluggable Authentication
Modules for Linux) project. Information about the project can be
found at ⟨http://www.linux-pam.org/⟩. If you have a bug report
for this manual page, see ⟨//www.linux-pam.org/⟩. This page was
obtained from the project's upstream Git repository
⟨https://github.com/linux-pam/linux-pam.git⟩ on 2023-12-22. (At
that time, the date of the most recent commit that was found in
the repository was 2023-12-18.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
[email protected]
Linux-PAM Manual 12/22/2023 PAM_AUTHENTICATE(3)
Pages that refer to this page: pam(3), pam_acct_mgmt(3), pam_chauthtok(3), pam_fail_delay(3), pam_setcred(3), pam_set_data(3), pam_sm_authenticate(3), pam_sm_setcred(3), PAM(8), pam_filter(8)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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