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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | COLOPHON |
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PAM_SM_AUTHENTICATE(3) Linux-PAM Manual PAM_SM_AUTHENTICATE(3)
pam_sm_authenticate - PAM service function for user authentication
#include <security/pam_modules.h>
int pam_sm_authenticate(pam_handle_t *pamh, int flags, int argc,
const char **argv);
The pam_sm_authenticate function is the service module's
implementation of the pam_authenticate(3) interface.
This function performs the task of authenticating the user.
Valid flags, which may be logically OR'd with PAM_SILENT, are:
PAM_SILENT
Do not emit any messages.
PAM_DISALLOW_NULL_AUTHTOK
Return PAM_AUTH_ERR if the database of authentication tokens
for this authentication mechanism has a NULL entry for the
user. Without this flag, such a NULL token will lead to a
success without the user being prompted.
PAM_AUTH_ERR
Authentication failure.
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_SUCCESS
The authentication token was successfully updated.
PAM_USER_UNKNOWN
The supplied username is not known to the authentication
service.
PAM_MAXTRIES
One or more of the authentication modules has reached its
limit of tries authenticating the user. Do not try again.
pam(3), pam_authenticate(3), pam_sm_setcred(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_SM_AUTHENTICATE(3)
Pages that refer to this page: pam_get_item(3), pam_set_item(3), pam_sm_setcred(3), pam_debug(8)
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HTML rendering created 2025-09-06 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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