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031c354e85
freeipa/daemons/ipa-slapi-plugins/ipa-uuid/ipa_uuid.c
Thierry Bordaz 9345142c2b
389-ds-base crashed as part of ipa-server-intall in ipa-uuid 
Bug Description:
	When adding an entry, ipa-uuid plugin may generate a unique value
	for some of its attribute.
	If the generated attribute is part of the RDN, the target DN
	is replaced on the fly and the previous one freed.
	Unfortunately, previous DN may be later used instead of
	the new one.

Fix Description:
	Make sure to use only the current DN of the operation

https://bugzilla.redhat.com/show_bug.cgi?id=1496226
https://pagure.io/freeipa/issue/7227

Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
2017-11-08 08:06:35 +01:00

1261 lines
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/** BEGIN COPYRIGHT BLOCK
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Additional permission under GPLv3 section 7:
*
* In the following paragraph, "GPL" means the GNU General Public
* License, version 3 or any later version, and "Non-GPL Code" means
* code that is governed neither by the GPL nor a license
* compatible with the GPL.
*
* You may link the code of this Program with Non-GPL Code and convey
* linked combinations including the two, provided that such Non-GPL
* Code only links to the code of this Program through those well
* defined interfaces identified in the file named EXCEPTION found in
* the source code files (the "Approved Interfaces"). The files of
* Non-GPL Code may instantiate templates or use macros or inline
* functions from the Approved Interfaces without causing the resulting
* work to be covered by the GPL. Only the copyright holders of this
* Program may make changes or additions to the list of Approved
* Interfaces.
*
* Copyright (C) 2010 Red Hat, Inc.
* All rights reserved.
* END COPYRIGHT BLOCK **/
/**
* IPA UUID plug-in
*/
#include <string.h>
#include <stdbool.h>
#include "slapi-plugin.h"
#include "nspr.h"
#include "prclist.h"
#include "uuid/uuid.h"
#include <pthread.h>
#include "util.h"
#define IPAUUID_STR_SIZE 36
#define IPAUUID_PLUGIN_NAME "ipa-uuid-plugin"
#define IPAUUID_PLUGIN_VERSION 0x00010000
#define IPAUUID_DN "cn=IPA UUID,cn=plugins,cn=config" /* temporary */
#define IPA_PLUGIN_NAME IPAUUID_PLUGIN_NAME
/**
* IPA UUID config types
*/
#define IPAUUID_ATTR "ipaUuidAttr"
#define IPAUUID_PREFIX "ipaUuidPrefix"
#define IPAUUID_GENERATE "ipaUuidMagicRegen"
#define IPAUUID_FILTER "ipaUuidFilter"
#define IPAUUID_SCOPE "ipaUuidScope"
#define IPAUUID_EXCLUDE_SUBTREE "ipaUuidExcludeSubtree"
#define IPAUUID_ENFORCE "ipaUuidEnforce"
#define IPAUUID_FEATURE_DESC "IPA UUID"
#define IPAUUID_PLUGIN_DESC "IPA UUID plugin"
#define IPAUUID_INT_PREOP_DESC "IPA UUID internal preop plugin"
#define IPAUUID_POSTOP_DESC "IPA UUID postop plugin"
static Slapi_PluginDesc pdesc = {
IPAUUID_FEATURE_DESC,
"Red Hat, Inc.",
"1.0",
IPAUUID_PLUGIN_DESC
};
/**
* linked list of config entries
*/
struct configEntry {
PRCList list;
char *dn;
char *attr;
char *prefix;
char *filter;
Slapi_Filter *slapi_filter;
char *generate;
char *scope;
char *exclude_subtree;
bool enforce;
};
static PRCList *ipauuid_global_config = NULL;
static pthread_rwlock_t g_ipauuid_cache_lock;
static void *_PluginID = NULL;
static char *_PluginDN = NULL;
static int g_plugin_started = 0;
/**
*
* management functions
*
*/
int ipauuid_init(Slapi_PBlock * pb);
static int ipauuid_start(Slapi_PBlock * pb);
static int ipauuid_close(Slapi_PBlock * pb);
static int ipauuid_internal_preop_init(Slapi_PBlock *pb);
static int ipauuid_postop_init(Slapi_PBlock * pb);
/**
*
* Local operation functions
*
*/
static int ipauuid_load_plugin_config(void);
static int ipauuid_parse_config_entry(Slapi_Entry * e, bool apply);
static void ipauuid_delete_config(void);
static void ipauuid_free_config_entry(struct configEntry ** entry);
/**
*
* helpers
*
*/
static char *ipauuid_get_dn(Slapi_PBlock * pb);
static int ipauuid_dn_is_config(char *dn);
static int ipauuid_list_contains_attr(char **list, char *attr);
/**
*
* the ops (where the real work is done)
*
*/
static int ipauuid_config_check_post_op(Slapi_PBlock * pb);
static int ipauuid_pre_op(Slapi_PBlock * pb, int modtype);
static int ipauuid_mod_pre_op(Slapi_PBlock * pb);
static int ipauuid_add_pre_op(Slapi_PBlock * pb);
/**
* debug functions - global, for the debugger
*/
void ipauuid_dump_config(void);
void ipauuid_dump_config_entry(struct configEntry *);
/**
*
* Deal with cache locking
*
*/
void ipauuid_read_lock(void)
{
pthread_rwlock_rdlock(&g_ipauuid_cache_lock);
}
void ipauuid_write_lock(void)
{
pthread_rwlock_wrlock(&g_ipauuid_cache_lock);
}
void ipauuid_unlock(void)
{
pthread_rwlock_unlock(&g_ipauuid_cache_lock);
}
/**
*
* Get the plug-in version
*
*/
int ipauuid_version(void)
{
return IPAUUID_PLUGIN_VERSION;
}
/**
* Plugin identity mgmt
*/
void setPluginID(void *pluginID)
{
_PluginID = pluginID;
}
void *getPluginID(void)
{
return _PluginID;
}
void setPluginDN(char *pluginDN)
{
_PluginDN = pluginDN;
}
char *getPluginDN(void)
{
return _PluginDN;
}
/*
ipauuid_init
-------------
adds our callbacks to the list
*/
int
ipauuid_init(Slapi_PBlock *pb)
{
int status = EOK;
char *plugin_identity = NULL;
LOG_TRACE("--in-->\n");
/**
* Store the plugin identity for later use.
* Used for internal operations
*/
slapi_pblock_get(pb, SLAPI_PLUGIN_IDENTITY, &plugin_identity);
PR_ASSERT(plugin_identity);
setPluginID(plugin_identity);
if (slapi_pblock_set(pb, SLAPI_PLUGIN_VERSION,
SLAPI_PLUGIN_VERSION_01) != 0 ||
slapi_pblock_set(pb, SLAPI_PLUGIN_START_FN,
(void *) ipauuid_start) != 0 ||
slapi_pblock_set(pb, SLAPI_PLUGIN_CLOSE_FN,
(void *) ipauuid_close) != 0 ||
slapi_pblock_set(pb, SLAPI_PLUGIN_DESCRIPTION,
(void *) &pdesc) != 0 ||
slapi_pblock_set(pb, SLAPI_PLUGIN_PRE_MODIFY_FN,
(void *) ipauuid_mod_pre_op) != 0 ||
slapi_pblock_set(pb, SLAPI_PLUGIN_PRE_ADD_FN,
(void *) ipauuid_add_pre_op) != 0 ||
/* internal preoperation */
slapi_register_plugin("internalpreoperation", /* op type */
1, /* Enabled */
"ipauuid_init", /* this function desc */
ipauuid_internal_preop_init, /* init func */
IPAUUID_INT_PREOP_DESC, /* plugin desc */
NULL, /* ? */
plugin_identity /* access control */
) ||
/* the config change checking post op */
slapi_register_plugin("postoperation", /* op type */
1, /* Enabled */
"ipauuid_init", /* this function desc */
ipauuid_postop_init, /* init func for post op */
IPAUUID_POSTOP_DESC, /* plugin desc */
NULL, /* ? */
plugin_identity /* access control */
)
) {
LOG_FATAL("failed to register plugin\n");
status = EFAIL;
}
LOG_TRACE("<--out--\n");
return status;
}
static int
ipauuid_internal_preop_init(Slapi_PBlock *pb)
{
int status = EOK;
if (slapi_pblock_set(pb, SLAPI_PLUGIN_VERSION,
SLAPI_PLUGIN_VERSION_01) != 0 ||
slapi_pblock_set(pb, SLAPI_PLUGIN_DESCRIPTION,
(void *) &pdesc) != 0 ||
slapi_pblock_set(pb, SLAPI_PLUGIN_INTERNAL_PRE_MODIFY_FN,
(void *) ipauuid_mod_pre_op) != 0 ||
slapi_pblock_set(pb, SLAPI_PLUGIN_INTERNAL_PRE_ADD_FN,
(void *) ipauuid_add_pre_op) != 0) {
status = EFAIL;
}
return status;
}
static int
ipauuid_postop_init(Slapi_PBlock *pb)
{
int status = EOK;
if (slapi_pblock_set(pb, SLAPI_PLUGIN_VERSION,
SLAPI_PLUGIN_VERSION_01) != 0 ||
slapi_pblock_set(pb, SLAPI_PLUGIN_DESCRIPTION,
(void *) &pdesc) != 0 ||
slapi_pblock_set(pb, SLAPI_PLUGIN_POST_ADD_FN,
(void *) ipauuid_config_check_post_op) != 0 ||
slapi_pblock_set(pb, SLAPI_PLUGIN_POST_MODRDN_FN,
(void *) ipauuid_config_check_post_op) != 0 ||
slapi_pblock_set(pb, SLAPI_PLUGIN_POST_DELETE_FN,
(void *) ipauuid_config_check_post_op) != 0 ||
slapi_pblock_set(pb, SLAPI_PLUGIN_POST_MODIFY_FN,
(void *) ipauuid_config_check_post_op) != 0) {
LOG_FATAL("failed to register plugin\n");
status = EFAIL;
}
return status;
}
/*
ipauuid_start
--------------
Kicks off the config cache.
It is called after ipauuid_init.
*/
static int
ipauuid_start(Slapi_PBlock * pb)
{
char *plugindn = NULL;
LOG_TRACE("--in-->\n");
/* Check if we're already started */
if (g_plugin_started) {
goto done;
}
if (pthread_rwlock_init(&g_ipauuid_cache_lock, NULL) != 0) {
LOG_FATAL("lock creation failed\n");
return EFAIL;
}
/**
* Get the plug-in target dn from the system
* and store it for future use. This should avoid
* hardcoding of DN's in the code.
*/
slapi_pblock_get(pb, SLAPI_TARGET_DN, &plugindn);
if (NULL == plugindn || 0 == strlen(plugindn)) {
LOG("had to use hard coded config dn\n");
plugindn = IPAUUID_DN;
} else {
LOG("config at %s\n", plugindn);
}
setPluginDN(plugindn);
/*
* Load the config for our plug-in
*/
ipauuid_global_config = (PRCList *)
slapi_ch_calloc(1, sizeof(struct configEntry));
PR_INIT_CLIST(ipauuid_global_config);
if (ipauuid_load_plugin_config() != EOK) {
LOG_FATAL("unable to load plug-in configuration\n");
return EFAIL;
}
g_plugin_started = 1;
LOG("ready for service\n");
LOG_TRACE("<--out--\n");
done:
return EOK;
}
/*
ipauuid_close
--------------
closes down the cache
*/
static int
ipauuid_close(Slapi_PBlock * pb)
{
LOG_TRACE( "--in-->\n");
ipauuid_delete_config();
slapi_ch_free((void **)&ipauuid_global_config);
LOG_TRACE("<--out--\n");
return EOK;
}
/*
* config looks like this
* - cn=myplugin
* --- cn=posix
* ------ cn=accounts
* ------ cn=groups
* --- cn=samba
* --- cn=etc
* ------ cn=etc etc
*/
static int
ipauuid_load_plugin_config()
{
int status = EOK;
int result;
int i;
Slapi_PBlock *search_pb;
Slapi_Entry **entries = NULL;
LOG_TRACE("--in-->\n");
ipauuid_write_lock();
ipauuid_delete_config();
search_pb = slapi_pblock_new();
slapi_search_internal_set_pb(search_pb, getPluginDN(),
LDAP_SCOPE_SUBTREE, "objectclass=*",
NULL, 0, NULL, NULL, getPluginID(), 0);
slapi_search_internal_pb(search_pb);
slapi_pblock_get(search_pb, SLAPI_PLUGIN_INTOP_RESULT, &result);
if (LDAP_SUCCESS != result) {
status = EFAIL;
goto cleanup;
}
slapi_pblock_get(search_pb, SLAPI_PLUGIN_INTOP_SEARCH_ENTRIES,
&entries);
if (NULL == entries || NULL == entries[0]) {
status = EOK;
goto cleanup;
}
for (i = 0; (entries[i] != NULL); i++) {
/* We don't care about the status here because we may have
* some invalid config entries, but we just want to continue
* looking for valid ones. */
ipauuid_parse_config_entry(entries[i], true);
}
cleanup:
slapi_free_search_results_internal(search_pb);
slapi_pblock_destroy(search_pb);
ipauuid_unlock();
LOG_TRACE("<--out--\n");
return status;
}
/*
* ipauuid_parse_config_entry()
*
* Parses a single config entry. If apply is non-zero, then
* we will load and start using the new config. You can simply
* validate config without making any changes by setting apply
* to 0.
*
* Returns EOK if the entry is valid and EFAIL
* if it is invalid.
*/
static int
ipauuid_parse_config_entry(Slapi_Entry * e, bool apply)
{
char *value;
struct configEntry *entry = NULL;
struct configEntry *config_entry;
PRCList *list;
int entry_added = 0;
int ret = EOK;
LOG_TRACE("--in-->\n");
/* If this is the main UUID plug-in config entry, just bail. */
if (strcasecmp(getPluginDN(), slapi_entry_get_ndn(e)) == 0) {
ret = EFAIL;
goto bail;
}
entry = (struct configEntry *)
slapi_ch_calloc(1, sizeof(struct configEntry));
if (NULL == entry) {
ret = EFAIL;
goto bail;
}
value = slapi_entry_get_ndn(e);
if (value) {
entry->dn = slapi_ch_strdup(value);
}
LOG_CONFIG("----------> dn [%s]\n", entry->dn);
entry->attr = slapi_entry_attr_get_charptr(e, IPAUUID_ATTR);
if (!entry->attr) {
LOG_FATAL("The %s config setting is required for %s.\n",
IPAUUID_ATTR, entry->dn);
ret = EFAIL;
goto bail;
}
LOG_CONFIG("----------> %s [%s]\n", IPAUUID_ATTR, entry->attr);
value = slapi_entry_attr_get_charptr(e, IPAUUID_PREFIX);
if (value && value[0]) {
entry->prefix = value;
}
LOG_CONFIG("----------> %s [%s]\n", IPAUUID_PREFIX, entry->prefix);
value = slapi_entry_attr_get_charptr(e, IPAUUID_GENERATE);
if (value) {
entry->generate = value;
}
LOG_CONFIG("----------> %s [%s]\n", IPAUUID_GENERATE, entry->generate);
value = slapi_entry_attr_get_charptr(e, IPAUUID_FILTER);
if (value) {
entry->filter = value;
if (NULL == (entry->slapi_filter = slapi_str2filter(value))) {
LOG_FATAL("Error: Invalid search filter in entry [%s]: [%s]\n",
entry->dn, value);
ret = EFAIL;
goto bail;
}
} else {
LOG_FATAL("The %s config setting is required for %s.\n",
IPAUUID_FILTER, entry->dn);
ret = EFAIL;
goto bail;
}
LOG_CONFIG("----------> %s [%s]\n", IPAUUID_FILTER, value);
value = slapi_entry_attr_get_charptr(e, IPAUUID_SCOPE);
if (value) {
entry->scope = value;
} else {
LOG_FATAL("The %s config config setting is required for %s.\n",
IPAUUID_SCOPE, entry->dn);
ret = EFAIL;
goto bail;
}
LOG_CONFIG("----------> %s [%s]\n", IPAUUID_SCOPE, entry->scope);
value = slapi_entry_attr_get_charptr(e, IPAUUID_EXCLUDE_SUBTREE);
entry->exclude_subtree = value;
LOG_CONFIG("----------> %s [%s]\n", IPAUUID_EXCLUDE_SUBTREE, entry->exclude_subtree);
entry->enforce = slapi_entry_attr_get_bool(e, IPAUUID_ENFORCE);
LOG_CONFIG("----------> %s [%s]\n",
IPAUUID_ENFORCE, entry->enforce ? "True" : "False");
/* If we were only called to validate config, we can
* just bail out before applying the config changes */
if (!apply) {
goto bail;
}
/**
* Finally add the entry to the list.
* We sort by scope dn length with longer
* dn's first - this allows the scope
* checking code to be simple and quick and
* cunningly linear.
*/
if (!PR_CLIST_IS_EMPTY(ipauuid_global_config)) {
list = PR_LIST_HEAD(ipauuid_global_config);
while (list != ipauuid_global_config) {
config_entry = (struct configEntry *) list;
if (slapi_dn_issuffix(entry->scope, config_entry->scope)) {
PR_INSERT_BEFORE(&(entry->list), list);
LOG_CONFIG("store [%s] before [%s] \n",
entry->scope, config_entry->scope);
entry_added = 1;
break;
}
list = PR_NEXT_LINK(list);
if (ipauuid_global_config == list) {
/* add to tail */
PR_INSERT_BEFORE(&(entry->list), list);
LOG_CONFIG("store [%s] at tail\n", entry->scope);
entry_added = 1;
break;
}
}
} else {
/* first entry */
PR_INSERT_LINK(&(entry->list), ipauuid_global_config);
LOG_CONFIG("store [%s] at head \n", entry->scope);
entry_added = 1;
}
bail:
if (0 == entry_added) {
/* Don't log error if we weren't asked to apply config */
if (apply && (entry != NULL)) {
LOG_FATAL("Invalid config entry [%s] skipped\n", entry->dn);
}
ipauuid_free_config_entry(&entry);
} else {
ret = EOK;
}
LOG_TRACE("<--out--\n");
return ret;
}
static void
ipauuid_free_config_entry(struct configEntry **entry)
{
struct configEntry *e;
if (!entry || !*entry) {
return;
}
e = *entry;
if (e->dn) {
LOG_CONFIG("freeing config entry [%s]\n", e->dn);
slapi_ch_free_string(&e->dn);
}
if (e->attr) {
slapi_ch_free_string(&e->attr);
}
if (e->prefix) {
slapi_ch_free_string(&e->prefix);
}
if (e->filter) {
slapi_ch_free_string(&e->filter);
}
if (e->slapi_filter) {
slapi_filter_free(e->slapi_filter, 1);
}
if (e->generate) {
slapi_ch_free_string(&e->generate);
}
if (e->scope) {
slapi_ch_free_string(&e->scope);
}
if (e->exclude_subtree) {
slapi_ch_free_string(&e->exclude_subtree);
}
slapi_ch_free((void **)entry);
}
static void
ipauuid_delete_configEntry(PRCList *entry)
{
PR_REMOVE_LINK(entry);
ipauuid_free_config_entry((struct configEntry **) &entry);
}
static void
ipauuid_delete_config()
{
PRCList *list;
while (!PR_CLIST_IS_EMPTY(ipauuid_global_config)) {
list = PR_LIST_HEAD(ipauuid_global_config);
ipauuid_delete_configEntry(list);
}
return;
}
/****************************************************
Helpers
****************************************************/
static char *ipauuid_get_dn(Slapi_PBlock * pb)
{
char *dn = NULL;
LOG_TRACE("--in-->\n");
if (slapi_pblock_get(pb, SLAPI_TARGET_DN, &dn)) {
LOG_FATAL("failed to get dn of changed entry");
}
LOG_TRACE("<--out--\n");
return dn;
}
/* config check
matching config dn or a descendent reloads config
*/
static int ipauuid_dn_is_config(char *dn)
{
int ret = 0;
LOG_TRACE("--in-->\n");
if (slapi_dn_issuffix(dn, getPluginDN())) {
ret = 1;
}
LOG_TRACE("<--out--\n");
return ret;
}
/****************************************************
Functions that actually do things other
than config and startup
****************************************************/
/*
* ipauuid_list_contains_attr()
*
* Checks if a attr is contained in a list of attrs.
* Returns 1 if the attr is found, 0 otherwise.
*/
static int
ipauuid_list_contains_attr(char **list, char *attr)
{
int ret = 0;
int i = 0;
if (list && attr) {
for (i = 0; list[i]; i++) {
if (slapi_attr_types_equivalent(attr, list[i])) {
ret = 1;
break;
}
}
}
return ret;
}
/* this function must be passed a preallocated buffer of 37 characters in the
* out parameter */
static void ipauuid_generate_uuid(char *out)
{
uuid_t uu;
uuid_generate_time(uu);
uuid_unparse_lower(uu, out);
}
/* for mods and adds:
where dn's are supplied, the closest in scope
is used as long as the type filter matches
and the attr value has not been generated yet.
*/
static int ipauuid_pre_op(Slapi_PBlock *pb, int modtype)
{
char *dn = NULL;
PRCList *list = NULL;
struct configEntry *cfgentry = NULL;
struct slapi_entry *e = NULL;
Slapi_Entry *resulting_e = NULL;
char *value = NULL;
char **generated_attrs = NULL;
Slapi_Mods *smods = NULL;
Slapi_Mod *smod = NULL;
Slapi_Mod *next_mod;
LDAPMod **mods;
bool free_entry = false;
char *errstr = NULL;
bool generate;
int ret = LDAP_SUCCESS;
bool locked = false;
bool set_attr;
int is_repl_op;
int is_config_dn;
LOG_TRACE("--in-->\n");
/* Just bail if we aren't ready to service requests yet. */
if (!g_plugin_started) {
goto done;
}
dn = ipauuid_get_dn(pb);
if (!dn) {
goto done;
}
is_config_dn = ipauuid_dn_is_config(dn);
ret = slapi_pblock_get(pb, SLAPI_IS_REPLICATED_OPERATION, &is_repl_op);
if (ret != 0) {
LOG_FATAL("slapi_pblock_get failed!?\n");
ret = LDAP_OPERATIONS_ERROR;
goto done;
}
/* pass through if this is a replicated operation */
if (is_repl_op && !is_config_dn) {
return 0;
}
if (modtype != LDAP_CHANGETYPE_ADD &&
modtype != LDAP_CHANGETYPE_MODIFY) {
goto done;
}
if (LDAP_CHANGETYPE_ADD == modtype) {
slapi_pblock_get(pb, SLAPI_ADD_ENTRY, &e);
} else {
/* xxxPAR: Ideally SLAPI_MODIFY_EXISTING_ENTRY should be
* available but it turns out that is only true if you are
* a dbm backend pre-op plugin - lucky dbm backend pre-op
* plugins.
* I think that is wrong since the entry is useful for filter
* tests and schema checks and this plugin shouldn't be limited
* to a single backend type, but I don't want that fight right
* now so we go get the entry here
*
slapi_pblock_get( pb, SLAPI_MODIFY_EXISTING_ENTRY, &e);
*/
Slapi_DN *tmp_dn = slapi_sdn_new_dn_byref(dn);
if (tmp_dn) {
ret = slapi_search_internal_get_entry(tmp_dn, NULL, &e, getPluginID());
slapi_sdn_free(&tmp_dn);
if (ret == LDAP_REFERRAL) {
/* we have a referral so nothing for us to do, but return
* success so we allow the MOD to proceed.
*/
ret = LDAP_SUCCESS;
free_entry = true;
goto done;
}
if (ret) {
/* ok a client tried to modify an entry that doesn't exist.
* Nothing to see here, move along ... */
goto done;
}
free_entry = true;
}
/* grab the mods - we'll put them back later with
* our modifications appended
*/
slapi_pblock_get(pb, SLAPI_MODIFY_MODS, &mods);
smods = slapi_mods_new();
slapi_mods_init_passin(smods, mods);
/* We need the resulting entry after the mods are applied to
* see if the entry is within the scope. */
if (e) {
resulting_e = slapi_entry_dup(e);
if (mods && (slapi_entry_apply_mods(resulting_e, mods) != LDAP_SUCCESS)) {
/* The mods don't apply cleanly, so we just let this op go
* to let the main server handle it. */
goto done;
}
}
}
if (NULL == e) {
goto done;
}
if (is_config_dn) {
/* Validate config changes, but don't apply them.
* This allows us to reject invalid config changes
* here at the pre-op stage. Applying the config
* needs to be done at the post-op stage. */
Slapi_Entry *test_e = NULL;
/* For a MOD, we need to check the resulting entry */
if (LDAP_CHANGETYPE_ADD == modtype) {
test_e = e;
} else {
test_e = resulting_e;
}
if (ipauuid_parse_config_entry(test_e, false) != EOK) {
/* Refuse the operation if config parsing failed. */
ret = LDAP_UNWILLING_TO_PERFORM;
if (LDAP_CHANGETYPE_ADD == modtype) {
errstr = slapi_ch_smprintf("Not a valid IPA UUID "
"configuration entry.");
} else {
errstr = slapi_ch_smprintf("Changes result in an invalid "
"IPA UUID configuration.");
}
}
/* We're done, so just bail. */
goto done;
}
ipauuid_read_lock();
locked = true;
if (PR_CLIST_IS_EMPTY(ipauuid_global_config)) {
goto done;
}
list = PR_LIST_HEAD(ipauuid_global_config);
for(list = PR_LIST_HEAD(ipauuid_global_config);
list != ipauuid_global_config;
list = PR_NEXT_LINK(list)) {
cfgentry = (struct configEntry *) list;
char *current_dn = NULL;
generate = false;
set_attr = false;
/* Did we already service this attr? */
if (ipauuid_list_contains_attr(generated_attrs,
cfgentry->attr)) {
continue;
}
/* Current DN may have been reset by
* slapi_pblock_set(pb, SLAPI_ADD_TARGET,..) see below
* need to reread it
*/
current_dn = ipauuid_get_dn(pb);
/* is the entry in scope? */
if (cfgentry->scope) {
if (!slapi_dn_issuffix(current_dn, cfgentry->scope)) {
continue;
}
}
if (cfgentry->exclude_subtree) {
if (slapi_dn_issuffix(current_dn, cfgentry->exclude_subtree)) {
continue;
}
}
/* does the entry match the filter? */
if (cfgentry->slapi_filter) {
Slapi_Entry *test_e = NULL;
/* For a MOD operation, we need to check the filter
* against the resulting entry. */
if (LDAP_CHANGETYPE_ADD == modtype) {
test_e = e;
} else {
test_e = resulting_e;
}
ret = slapi_vattr_filter_test(pb, test_e,
cfgentry->slapi_filter, 0);
if (ret != LDAP_SUCCESS) {
continue;
}
}
switch(modtype) {
case LDAP_CHANGETYPE_ADD:
/* Generate the value if the magic value is set or if the
* attr is missing. */
value = slapi_entry_attr_get_charptr(e, cfgentry->attr);
if (!value ||
!slapi_UTF8CASECMP(cfgentry->generate, value)) {
generate = true;
}
slapi_ch_free_string(&value);
/* always true on add if we match the scope */
set_attr = true;
break;
case LDAP_CHANGETYPE_MODIFY:
/* check mods for magic value */
next_mod = slapi_mod_new();
smod = slapi_mods_get_first_smod(smods, next_mod);
while (smod) {
char *attr = (char *)slapi_mod_get_type(smod);
/* See if the attr matches the configured attr. */
if (!slapi_attr_types_equivalent(cfgentry->attr, attr)) {
slapi_mod_done(next_mod);
smod = slapi_mods_get_next_smod(smods, next_mod);
continue;
}
/* ok we found the attr so that means we are going to set it */
set_attr = true;
/* If all values are being deleted, we need to
* generate a new value. */
if (SLAPI_IS_MOD_DELETE(slapi_mod_get_operation(smod))) {
int numvals = slapi_mod_get_num_values(smod);
if (numvals == 0) {
generate = true;
} else {
Slapi_Attr *sattr = NULL;
int e_numvals = 0;
if ((!slapi_entry_attr_find(e, attr, &sattr)) &&
(NULL != sattr)) {
slapi_attr_get_numvalues(sattr, &e_numvals);
if (numvals >= e_numvals) {
generate = true;
}
}
}
} else {
struct berval *bv;
/* If this attr is already slated for generation,
* a previous mod in this same modify operation
* either removed all values or set the magic value.
* It's possible that this mod is adding a valid value,
* which means we would not want to generate a new one.
* It is safe to reset the flag since it will be
* re-added here if necessary. */
generate = false;
/* This is either adding or replacing a value */
bv = slapi_mod_get_first_value(smod);
/* If we have a value, see if it's the magic value. */
if (bv) {
if (!slapi_UTF8CASECMP(bv->bv_val,
cfgentry->generate)) {
generate = true;
/* also remove this mod, as we will add
* it again later */
slapi_mod_remove_value(next_mod);
}
} else {
/* This is a replace with no new values, so we need
* to generate a new value */
generate = true;
}
}
slapi_mod_done(next_mod);
smod = slapi_mods_get_next_smod(smods, next_mod);
}
slapi_mod_free(&next_mod);
break;
default:
/* never reached, just silence compiler */
LOG_TRACE("File '%s' line %d: Got unexpected value of modtype:"
"%d\n", __FILE__, __LINE__, modtype);
break;
}
/* We need to perform one last check for modify operations.
* If an entry within the scope has not triggered generation yet,
* we need to see if a value exists for the managed attr in the
* resulting entry.
* This will catch a modify operation that brings an entry into
* scope for a managed range, but doesn't supply a value for the
* managed attr. */
if ((LDAP_CHANGETYPE_MODIFY == modtype) && !generate) {
Slapi_Attr *attr = NULL;
if (slapi_entry_attr_find(resulting_e,
cfgentry->attr, &attr) != 0) {
generate = true;
set_attr = true;
}
}
/* nothing to do keep looping */
if (!set_attr) {
continue;
}
if (generate) {
char *new_value;
/* create the value to add */
value = slapi_ch_calloc(1, IPAUUID_STR_SIZE + 1);
if (!value) {
LOG_OOM();
ret = LDAP_OPERATIONS_ERROR;
goto done;
}
ipauuid_generate_uuid(value);
if (cfgentry->prefix) {
new_value = slapi_ch_smprintf("%s%s",
cfgentry->prefix, value);
} else {
new_value = slapi_ch_smprintf("%s", value);
}
/* do the mod */
if (LDAP_CHANGETYPE_ADD == modtype) {
Slapi_DN *sdn;
Slapi_RDN *rdn;
char *attr;
char *nrdn;
/* add - set in entry */
slapi_entry_attr_set_charptr(e, cfgentry->attr, new_value);
/* check to see if we need to change the RDN too */
rdn = slapi_rdn_new();
if (!rdn) {
LOG_OOM();
ret = LDAP_OPERATIONS_ERROR;
goto done;
}
sdn = slapi_sdn_new_dn_byval(current_dn);
if (!sdn) {
LOG_OOM();
ret = LDAP_OPERATIONS_ERROR;
slapi_rdn_free(&rdn);
goto done;
}
slapi_rdn_set_sdn(rdn, sdn);
ret = slapi_rdn_contains_attr(rdn, cfgentry->attr, &attr);
slapi_rdn_done(rdn);
if (ret == 1) {
/* no need to recheck if it is valid, it will be handled
* later by checking the value in the entry */
nrdn = slapi_ch_smprintf("%s=%s",
cfgentry->attr, new_value);
if (!nrdn) {
LOG_OOM();
ret = LDAP_OPERATIONS_ERROR;
slapi_rdn_free(&rdn);
slapi_sdn_free(&sdn);
goto done;
}
slapi_rdn_set_dn(rdn, nrdn);
slapi_ch_free_string(&nrdn);
slapi_sdn_set_rdn(sdn, rdn);
slapi_entry_set_sdn(e, sdn);
/* reset the target DN since we've changed it. */
if (slapi_pblock_set(pb, SLAPI_ADD_TARGET,
(char*)slapi_sdn_get_ndn(slapi_entry_get_sdn_const(e)))) {
LOG_FATAL("slapi_block_set failed!\n");
ret = LDAP_OPERATIONS_ERROR;
slapi_rdn_free(&rdn);
slapi_sdn_free(&sdn);
goto done;
}
}
slapi_rdn_free(&rdn);
slapi_sdn_free(&sdn);
} else {
/* mod - add to mods */
slapi_mods_add_string(smods, LDAP_MOD_REPLACE,
cfgentry->attr, new_value);
}
/* Make sure we don't generate for this
* attr again by keeping a list of attrs
* we have generated for already.
*/
slapi_ch_array_add(&generated_attrs,
slapi_ch_strdup(cfgentry->attr));
/* free up */
slapi_ch_free_string(&value);
slapi_ch_free_string(&new_value);
} else {
char *bindDN = NULL;
int is_root;
slapi_pblock_get(pb, SLAPI_CONN_DN, &bindDN);
is_root = slapi_dn_isroot(bindDN);
/* If not set to the magic value, check enforcement */
if (cfgentry->enforce && is_root != 1) {
/* only Directory Manager can set arbitrary values when
* enforce is enabled. */
errstr = slapi_ch_smprintf("Only the Directory Manager "
"can set arbitrary values "
"for %s\n", cfgentry->attr);
ret = LDAP_INSUFFICIENT_ACCESS;
goto done;
}
}
}
ret = LDAP_SUCCESS;
done:
if (locked) {
ipauuid_unlock();
}
if (smods != NULL) {
/* Put the updated mods back into place. */
mods = slapi_mods_get_ldapmods_passout(smods);
if (slapi_pblock_set(pb, SLAPI_MODIFY_MODS, mods)) {
LOG_FATAL("slapi_pblock_set failed!\n");
ret = LDAP_OPERATIONS_ERROR;
}
slapi_mods_free(&smods);
}
slapi_ch_array_free(generated_attrs);
slapi_ch_free_string(&value);
if (free_entry && e) {
slapi_entry_free(e);
}
if (resulting_e) {
slapi_entry_free(resulting_e);
}
if (ret) {
LOG("operation failure [%d]\n", ret);
slapi_send_ldap_result(pb, ret, NULL, errstr, 0, NULL);
slapi_ch_free((void **)&errstr);
ret = EFAIL;
}
LOG_TRACE("<--out--\n");
return ret;
}
static int ipauuid_add_pre_op(Slapi_PBlock * pb)
{
return ipauuid_pre_op(pb, LDAP_CHANGETYPE_ADD);
}
static int ipauuid_mod_pre_op(Slapi_PBlock * pb)
{
return ipauuid_pre_op(pb, LDAP_CHANGETYPE_MODIFY);
}
static int ipauuid_config_check_post_op(Slapi_PBlock * pb)
{
char *dn;
LOG_TRACE("--in-->\n");
if ((dn = ipauuid_get_dn(pb))) {
if (ipauuid_dn_is_config(dn))
ipauuid_load_plugin_config();
}
LOG_TRACE("<--out--\n");
return 0;
}
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