cfb32a638e
Heimdal's HDB plugin interface, and hence Samba's KDC that depends upon it, doesn't work on 32-bit builds due to structure fields being arranged in the wrong order. This problem presents itself in the form of segmentation faults on 32-bit systems, but goes unnoticed on 64-bit builds thanks to extra structure padding absorbing the errant fields. This commit reorders the HDB plugin structure fields to prevent crashes and introduces a common macro to ensure every plugin presents a consistent interface. Samba BUG: https://bugzilla.samba.org/show_bug.cgi?id=15110 Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
106 lines
3.8 KiB
C
106 lines
3.8 KiB
C
/*
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* Copyright (c) 2006 - 2020 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Portions Copyright (c) 2018 AuriStor, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef HEIMDAL_BASE_COMMON_PLUGIN_H
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#define HEIMDAL_BASE_COMMON_PLUGIN_H
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#include <heimbase-svc.h>
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#ifdef _WIN32
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# ifndef HEIM_CALLCONV
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# define HEIM_CALLCONV __stdcall
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# endif
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# ifndef HEIM_LIB_CALL
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# define HEIM_LIB_CALL __stdcall
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# endif
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#else
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# ifndef HEIM_CALLCONV
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# define HEIM_CALLCONV
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# endif
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# ifndef HEIM_LIB_CALL
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# define HEIM_LIB_CALL
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# endif
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#endif
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#ifndef KRB5_CALLCONV
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# define KRB5_CALLCONV HEIM_CALLCONV
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#endif
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#ifndef KRB5_LIB_CALL
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# define KRB5_LIB_CALL HEIM_LIB_CALL
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#endif
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/* For krb5 plugins, this is a krb5_context */
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typedef struct heim_pcontext_s *heim_pcontext;
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typedef uintptr_t
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(HEIM_LIB_CALL *heim_get_instance_func_t)(const char *);
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typedef heim_get_instance_func_t krb5_get_instance_t;
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/*
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* All plugin function tables extend the following structure.
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*/
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struct heim_plugin_common_ftable_desc {
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HEIM_PLUGIN_FTABLE_COMMON_ELEMENTS(heim_pcontext);
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};
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typedef struct heim_plugin_common_ftable_desc heim_plugin_common_ftable;
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typedef struct heim_plugin_common_ftable_desc *heim_plugin_common_ftable_p;
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typedef struct heim_plugin_common_ftable_desc * const heim_plugin_common_ftable_cp;
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typedef int
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(HEIM_CALLCONV heim_plugin_load_ft)(heim_pcontext context,
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heim_get_instance_func_t *func,
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size_t *n_ftables,
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heim_plugin_common_ftable_cp **ftables);
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typedef heim_plugin_load_ft *heim_plugin_load_t;
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/* For source backwards-compatibility */
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typedef struct heim_plugin_common_ftable_desc krb5_plugin_common_ftable;
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typedef struct heim_plugin_common_ftable_desc *krb5_plugin_common_ftable_p;
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typedef struct heim_plugin_common_ftable_desc * const krb5_plugin_common_ftable_cp;
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typedef heim_plugin_load_ft krb5_plugin_load_ft;
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typedef heim_plugin_load_ft *krb5_plugin_load_t;
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/*
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* All plugins must export a function named "<type>_plugin_load" with
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* a signature of:
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*
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* int HEIM_CALLCONV
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* <type>_plugin_load(heim_pcontext context,
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* heim_get_instance_func_t *func,
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* size_t *n_ftables,
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* const heim_plugin_common_ftable *const **ftables);
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*/
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#endif /* HEIMDAL_BASE_COMMON_PLUGIN_H */
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