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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* lib/kadm5/srv/kadm5_hook.c */
/*
* Copyright (C) 2010 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.
*/
/* Consumer interface for kadm5_hook plugins. */
#include "k5-int.h"
#include "server_internal.h"
#include <krb5/kadm5_hook_plugin.h>
#include <adm_proto.h>
#include <syslog.h>
struct kadm5_hook_handle_st {
kadm5_hook_vftable_1 vt;
kadm5_hook_modinfo *data;
};
krb5_error_code
k5_kadm5_hook_load(krb5_context context,
kadm5_hook_handle **handles_out)
{
krb5_error_code ret;
krb5_plugin_initvt_fn *modules = NULL, *mod;
size_t count;
kadm5_hook_handle *list = NULL, handle = NULL;
*handles_out = NULL;
ret = k5_plugin_load_all(context, PLUGIN_INTERFACE_KADM5_HOOK, &modules);
if (ret != 0)
goto cleanup;
/* Allocate a large enough list of handles. */
for (count = 0; modules[count] != NULL; count++);
list = k5calloc(count + 1, sizeof(*list), &ret);
if (list == NULL)
goto cleanup;
/* For each module, allocate a handle, initialize its vtable, and
* initialize the module. */
count = 0;
for (mod = modules; *mod != NULL; mod++) {
handle = k5alloc(sizeof(*handle), &ret);
if (handle == NULL)
goto cleanup;
ret = (*mod)(context, 1, 1, (krb5_plugin_vtable)&handle->vt);
if (ret != 0) { /* Failed vtable init is non-fatal. */
free(handle);
handle = NULL;
continue;
}
handle->data = NULL;
if (handle->vt.init != NULL) {
ret = handle->vt.init(context, &handle->data);
if (ret != 0) /* Failed initialization is fatal. */
goto cleanup;
}
list[count++] = handle;
list[count] = NULL;
handle = NULL;
}
list[count] = NULL;
ret = 0;
*handles_out = list;
list = NULL;
cleanup:
free(handle);
k5_plugin_free_modules(context, modules);
k5_kadm5_hook_free_handles(context, list);
return ret;
}
void
k5_kadm5_hook_free_handles(krb5_context context, kadm5_hook_handle *handles)
{
kadm5_hook_handle *hp, handle;
if (handles == NULL)
return;
for (hp = handles; *hp != NULL; hp++) {
handle = *hp;
if (handle->vt.fini != NULL)
handle->vt.fini(context, handle->data);
free(handle);
}
free(handles);
}
static void
log_failure(krb5_context context,
const char *name,
const char *function,
krb5_error_code ret)
{
const char *e = krb5_get_error_message(context, ret);
krb5_klog_syslog(LOG_ERR, _("kadm5_hook %s failed postcommit %s: %s"),
name, function, e);
krb5_free_error_message(context, e);
}
#define ITERATE(operation, params) \
for (; *handles; handles++) { \
kadm5_hook_handle h = *handles; \
krb5_error_code ret = 0; \
if (h->vt.operation) { \
ret = h->vt.operation params; \
} \
if (ret) { \
if (stage == KADM5_HOOK_STAGE_PRECOMMIT) \
return ret; \
else \
log_failure(context, h->vt.name, #operation, ret); \
} \
}
kadm5_ret_t
k5_kadm5_hook_chpass(krb5_context context, kadm5_hook_handle *handles,
int stage, krb5_principal princ, krb5_boolean keepold,
int n_ks_tuple, krb5_key_salt_tuple *ks_tuple,
const char *newpass)
{
ITERATE(chpass, (context, h->data,
stage, princ, keepold,
n_ks_tuple, ks_tuple, newpass));
return 0;
}
kadm5_ret_t
k5_kadm5_hook_create(krb5_context context, kadm5_hook_handle *handles,
int stage, kadm5_principal_ent_t princ, long mask,
int n_ks_tuple, krb5_key_salt_tuple *ks_tuple,
const char *newpass)
{
ITERATE(create, (context, h->data,
stage, princ, mask, n_ks_tuple, ks_tuple, newpass));
return 0;
}
kadm5_ret_t
k5_kadm5_hook_modify(krb5_context context, kadm5_hook_handle *handles,
int stage, kadm5_principal_ent_t princ, long mask)
{
ITERATE(modify, (context, h->data, stage, princ, mask));
return 0;
}
kadm5_ret_t
k5_kadm5_hook_remove(krb5_context context, kadm5_hook_handle *handles,
int stage, krb5_principal princ)
{
ITERATE(remove, (context, h->data, stage, princ));
return 0;
}
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