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Introduce macro for common plugin structure elements

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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>
This commit is contained in:
Joseph Sutton
2022-10-22 10:11:53 +13:00
committed by Nico Williams
parent 16179383fb
commit cfb32a638e
17 changed files with 57 additions and 63 deletions
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6
lib/krb5/an2ln_plugin.h
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@@ -36,6 +36,8 @@
#ifndef HEIMDAL_KRB5_AN2LN_PLUGIN_H
#define HEIMDAL_KRB5_AN2LN_PLUGIN_H 1
#include <heimbase-svc.h>
#define KRB5_PLUGIN_AN2LN "an2ln"
#define KRB5_PLUGIN_AN2LN_VERSION_0 0
@@ -80,9 +82,7 @@ typedef krb5_error_code (KRB5_LIB_CALL *set_result_f)(void *, const char *);
* @ingroup krb5_support
*/
typedef struct krb5plugin_an2ln_ftable_desc {
int minor_version;
krb5_error_code (KRB5_LIB_CALL *init)(krb5_context, void **);
void (KRB5_LIB_CALL *fini)(void *);
HEIM_PLUGIN_FTABLE_COMMON_ELEMENTS(krb5_context);
krb5_error_code (KRB5_LIB_CALL *an2ln)(void *, krb5_context, const char *,
krb5_const_principal, set_result_f, void *);
} krb5plugin_an2ln_ftable;