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/*
* Use database as policy and keystore
*
* Copyright (C) 2007 Olaf Kirch <olaf.kirch@oracle.com>
*/
#include <sys/stat.h>
#include <string.h>
#include <unistd.h>
#include "config.h"
#ifdef WITH_SECURITY
#include <openssl/pem.h>
#include <openssl/err.h>
#endif
#include <libisns/isns.h>
#include "security.h"
#include "objects.h"
#include "vendor.h"
#include <libisns/util.h>
/*
* DB keystore
*/
typedef struct isns_db_keystore isns_db_keystore_t;
struct isns_db_keystore {
isns_keystore_t sd_base;
isns_db_t * sd_db;
isns_object_t * sd_control;
};
/*
* Look up the policy object given its SPI
*/
isns_object_t *
__isns_db_keystore_lookup(isns_db_keystore_t *store,
const char *name, size_t namelen)
{
isns_attr_list_t keys = ISNS_ATTR_LIST_INIT;
char namebuf[256];
if (namelen >= sizeof(namebuf))
return NULL;
memcpy(namebuf, name, namelen);
namebuf[namelen] = '\0';
isns_attr_list_append_string(&keys,
OPENISNS_TAG_POLICY_SPI,
namebuf);
return isns_db_lookup(store->sd_db, NULL, &keys);
}
/*
* Load a DSA key from the DB store
*/
#ifdef WITH_SECURITY
static EVP_PKEY *
__isns_db_keystore_find(isns_keystore_t *store_base,
const char *name, size_t namelen)
{
isns_db_keystore_t *store = (isns_db_keystore_t *) store_base;
isns_object_t *obj;
const void *key_data;
size_t key_size;
obj = __isns_db_keystore_lookup(store, name, namelen);
if (obj == NULL)
return NULL;
if (!isns_object_get_opaque(obj, OPENISNS_TAG_POLICY_KEY,
&key_data, &key_size))
return NULL;
return isns_dsa_decode_public(key_data, key_size);
}
#else /* WITH_SECURITY */
static EVP_PKEY *
__isns_db_keystore_find(__attribute__((unused))isns_keystore_t *store_base,
__attribute__((unused))const char *name,
__attribute__((unused))size_t namelen)
{
return NULL;
}
#endif /* WITH_SECURITY */
/*
* Retrieve policy from database
*/
static void
__isns_db_keystore_copy_policy_string(isns_object_t *obj,
uint32_t tag, char **var)
{
const char *value;
if (!isns_object_get_string(obj, tag, &value))
return;
isns_assign_string(var, value);
}
static void
__isns_db_keystore_copy_policy_strings(isns_object_t *obj,
uint32_t tag, struct string_array *array)
{
isns_attr_list_t *attrs = &obj->ie_attrs;
unsigned int i;
for (i = 0; i < attrs->ial_count; ++i) {
isns_attr_t *attr = attrs->ial_data[i];
if (attr->ia_tag_id != tag
|| !ISNS_ATTR_IS_STRING(attr))
continue;
isns_string_array_append(array, attr->ia_value.iv_string);
}
}
static isns_policy_t *
__isns_db_keystore_get_policy(isns_keystore_t *store_base,
const char *name, size_t namelen)
{
isns_db_keystore_t *store = (isns_db_keystore_t *) store_base;
isns_policy_t *policy;
isns_object_t *obj;
uint32_t intval;
obj = __isns_db_keystore_lookup(store, name, namelen);
if (obj == NULL)
return NULL;
policy = __isns_policy_alloc(name, namelen);
/* retrieve policy bits from object */
#if 0
__isns_db_keystore_copy_policy_string(obj,
OPENISNS_TAG_POLICY_SOURCE_NAME,
&policy->ip_source);
#endif
__isns_db_keystore_copy_policy_string(obj,
OPENISNS_TAG_POLICY_ENTITY,
&policy->ip_entity);
__isns_db_keystore_copy_policy_string(obj,
OPENISNS_TAG_POLICY_DEFAULT_DD,
&policy->ip_dd_default);
__isns_db_keystore_copy_policy_strings(obj,
OPENISNS_TAG_POLICY_NODE_NAME,
&policy->ip_node_names);
if (isns_object_get_uint32(obj, OPENISNS_TAG_POLICY_OBJECT_TYPE, &intval))
policy->ip_object_types = intval;
if (isns_object_get_uint32(obj, OPENISNS_TAG_POLICY_NODE_TYPE, &intval))
policy->ip_node_types = intval;
if (isns_object_get_uint32(obj, OPENISNS_TAG_POLICY_FUNCTIONS, &intval))
policy->ip_functions = intval;
return policy;
}
void
__isns_db_keystore_change_notify(const isns_db_event_t *ev, void *handle)
{
isns_db_keystore_t *store = handle;
isns_object_t *obj = ev->ie_object;
if (isns_object_get_entity(obj) == store->sd_control) {
isns_debug_auth("DB keystore: policy data was modified\n");
store->sd_base.ic_generation++;
}
}
isns_keystore_t *
isns_create_db_keystore(isns_db_t *db)
{
isns_db_keystore_t *store;
isns_object_t *entity;
isns_debug_auth("Creating DB keystore\n");
if (!(entity = isns_db_get_control(db))) {
isns_error("Could not create control entity in database\n");
return NULL;
}
isns_debug_auth("Control entity is 0x%08x\n", entity->ie_index);
store = isns_calloc(1, sizeof(*store));
store->sd_base.ic_name = "database key store";
store->sd_base.ic_find = __isns_db_keystore_find;
store->sd_base.ic_get_policy = __isns_db_keystore_get_policy;
store->sd_control = entity;
store->sd_db = db;
isns_register_callback(__isns_db_keystore_change_notify, store);
return (isns_keystore_t *) store;
}
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