Hide and retrieve database credentials

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pam_setcred

PAM_SETCRED(3)							 Linux-PAM Manual						    PAM_SETCRED(3)

NAME

       pam_setcred - establish / delete user credentials

SYNOPSIS

       #include <security/pam_appl.h>

       int pam_setcred(pam_handle_t *pamh, int flags);

DESCRIPTION

       The pam_setcred function is used to establish, maintain and delete the credentials of a user. It should be called to set the credentials
       after a user has been authenticated and before a session is opened for the user (with pam_open_session(3)). The credentials should be
       deleted after the session has been closed (with pam_close_session(3)).

       A credential is something that the user possesses. It is some property, such as a Kerberos ticket, or a supplementary group membership that
       make up the uniqueness of a given user. On a Linux system the user's UID and GID's are credentials too. However, it has been decided that
       these properties (along with the default supplementary groups of which the user is a member) are credentials that should be set directly by
       the application and not by PAM. Such credentials should be established, by the application, prior to a call to this function. For example,
       initgroups(2) (or equivalent) should have been performed.

       Valid flags, any one of which, may be logically OR'd with PAM_SILENT, are:

       PAM_ESTABLISH_CRED
	   Initialize the credentials for the user.

       PAM_DELETE_CRED
	   Delete the user's credentials.

       PAM_REINITIALIZE_CRED
	   Fully reinitialize the user's credentials.

       PAM_REFRESH_CRED
	   Extend the lifetime of the existing credentials.

RETURN VALUES

       PAM_BUF_ERR
	   Memory buffer error.

       PAM_CRED_ERR
	   Failed to set user credentials.

       PAM_CRED_EXPIRED
	   User credentials are expired.

       PAM_CRED_UNAVAIL
	   Failed to retrieve user credentials.

       PAM_SUCCESS
	   Data was successful stored.

       PAM_SYSTEM_ERR
	   A NULL pointer was submitted as PAM handle, the function was called by a module or another system error occured.

       PAM_USER_UNKNOWN
	   User is not known to an authentication module.

SEE ALSO

       pam_authenticate(3), pam_open_session(3), pam_close_session(3), pam_strerror(3)

Linux-PAM Manual						    06/04/2011							    PAM_SETCRED(3)

Shell Programming and Scripting