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Editing: ccselect_plugin.h
/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */ /* * Copyright (C) 2011 by the Massachusetts Institute of Technology. * All rights reserved. * * Export of this software from the United States of America may * require a specific license from the United States Government. * It is the responsibility of any person or organization contemplating * export to obtain such a license before exporting. * * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and * distribute this software and its documentation for any purpose and * without fee is hereby granted, provided that the above copyright * notice appear in all copies and that both that copyright notice and * this permission notice appear in supporting documentation, and that * the name of M.I.T. not be used in advertising or publicity pertaining * to distribution of the software without specific, written prior * permission. Furthermore if you modify this software you must label * your software as modified software and not distribute it in such a * fashion that it might be confused with the original M.I.T. software. * M.I.T. makes no representations about the suitability of * this software for any purpose. It is provided "as is" without express * or implied warranty. */ /* * Declarations for credential cache selection module implementors. * * The ccselect pluggable interface currently has only one supported major * version, which is 1. Major version 1 has a current minor version number of * 1. * * Credential cache selection modules should define a function named * ccselect_<modulename>_initvt, matching the signature: * * krb5_error_code * ccselect_modname_initvt(krb5_context context, int maj_ver, int min_ver, * krb5_plugin_vtable vtable); * * The initvt function should: * * - Check that the supplied maj_ver number is supported by the module, or * return KRB5_PLUGIN_VER_NOTSUPP if it is not. * * - Cast the vtable pointer as appropriate for maj_ver: * maj_ver == 1: Cast to krb5_ccselect_vtable * * - Initialize the methods of the vtable, stopping as appropriate for the * supplied min_ver. Optional methods may be left uninitialized. * * Memory for the vtable is allocated by the caller, not by the module. */ #ifndef KRB5_CCSELECT_PLUGIN_H #define KRB5_CCSELECT_PLUGIN_H #include <krb5/krb5.h> #include <krb5/plugin.h> /* An abstract type for credential cache selection module data. */ typedef struct krb5_ccselect_moddata_st *krb5_ccselect_moddata; #define KRB5_CCSELECT_PRIORITY_AUTHORITATIVE 2 #define KRB5_CCSELECT_PRIORITY_HEURISTIC 1 /*** Method type declarations ***/ /* * Mandatory: Initialize module data and set *priority_out to one of the * KRB5_CCSELECT_PRIORITY constants above. Authoritative modules will be * consulted before heuristic ones. */ typedef krb5_error_code (*krb5_ccselect_init_fn)(krb5_context context, krb5_ccselect_moddata *data_out, int *priority_out); /* * Mandatory: Select a cache based on a server principal. Return 0 on success, * with *cache_out set to the selected cache and *princ_out set to its default * principal. Return KRB5_PLUGIN_NO_HANDLE to defer to other modules. Return * KRB5_CC_NOTFOUND with *princ_out set if the client principal can be * authoritatively determined but no cache exists for it. Return other errors * as appropriate. */ typedef krb5_error_code (*krb5_ccselect_choose_fn)(krb5_context context, krb5_ccselect_moddata data, krb5_principal server, krb5_ccache *cache_out, krb5_principal *princ_out); /* Optional: Release resources used by module data. */ typedef void (*krb5_ccselect_fini_fn)(krb5_context context, krb5_ccselect_moddata data); /*** vtable declarations **/ /* Credential cache selection plugin vtable for major version 1. */ typedef struct krb5_ccselect_vtable_st { const char *name; /* Mandatory: name of module. */ krb5_ccselect_init_fn init; krb5_ccselect_choose_fn choose; krb5_ccselect_fini_fn fini; /* Minor version 1 ends here. */ } *krb5_ccselect_vtable; #endif /* KRB5_CCSELECT_PLUGIN_H */
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