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Use SQLite3 based authentication

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The user data is now stored inside a SQLite3 database. By storing the data
inside a database, we remove the restriction that the previous hashtable
based implementation had.
This commit is contained in:
Markus Mäkelä
2017-01-28 12:58:24 +02:00
parent d4a06c61de
commit 041c0f1f2d
6 changed files with 378 additions and 27 deletions
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79
server/modules/authenticator/MySQLAuth/mysql_auth.c
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@ -41,6 +41,8 @@ static bool mysql_auth_is_client_ssl_capable(DCB *dcb);
static int mysql_auth_authenticate(DCB *dcb);
static void mysql_auth_free_client_data(DCB *dcb);
static int mysql_auth_load_users(SERV_LISTENER *port);
static void *mysql_auth_create(void *instance);
static void mysql_auth_destroy(void *data);
static int combined_auth_check(
DCB *dcb,
@ -72,12 +74,12 @@ MXS_MODULE* MXS_CREATE_MODULE()
static MXS_AUTHENTICATOR MyObject =
{
mysql_auth_init, /* Initialize the authenticator */
NULL, /* No create entry point */
mysql_auth_create, /* Create entry point */
mysql_auth_set_protocol_data, /* Extract data into structure */
mysql_auth_is_client_ssl_capable, /* Check if client supports SSL */
mysql_auth_authenticate, /* Authenticate user credentials */
mysql_auth_free_client_data, /* Free the client data held in DCB */
NULL, /* No destroy entry point */
mysql_auth_destroy, /* Destroy entry point */
mysql_auth_load_users, /* Load users from backend databases */
mysql_auth_reauthenticate /* Handle COM_CHANGE_USER */
};
@ -117,6 +119,24 @@ static void* mysql_auth_init(char **options)
instance->inject_service_user = true;
instance->skip_auth = false;
if (sqlite3_open_v2(MYSQLAUTH_DATABASE_NAME, &instance->handle, db_flags, NULL) != SQLITE_OK)
{
MXS_ERROR("Failed to open SQLite3 handle.");
MXS_FREE(instance);
return NULL;
}
char *err;
if (sqlite3_exec(instance->handle, create_sql, NULL, NULL, &err) != SQLITE_OK)
{
MXS_ERROR("Failed to create database: %s", err);
sqlite3_free(err);
sqlite3_close_v2(instance->handle);
MXS_FREE(instance);
return NULL;
}
for (int i = 0; options[i]; i++)
{
char *value = strchr(options[i], '=');
@ -165,6 +185,37 @@ static void* mysql_auth_init(char **options)
return instance;
}
static void* mysql_auth_create(void *instance)
{
mysql_auth_t *rval = MXS_MALLOC(sizeof(*rval));
if (rval)
{
if (sqlite3_open_v2(MYSQLAUTH_DATABASE_NAME, &rval->handle, db_flags, NULL) == SQLITE_OK)
{
sqlite3_busy_timeout(rval->handle, MXS_SQLITE_BUSY_TIMEOUT);
}
else
{
MXS_ERROR("Failed to open SQLite3 handle.");
MXS_FREE(rval);
rval = NULL;
}
}
return rval;
}
static void mysql_auth_destroy(void *data)
{
mysql_auth_t *auth = (mysql_auth_t*)data;
if (auth)
{
sqlite3_close_v2(auth->handle);
MXS_FREE(auth);
}
}
/**
* @brief Authenticates a MySQL user who is a client to MaxScale.
*
@ -183,7 +234,7 @@ mysql_auth_authenticate(DCB *dcb)
{
MySQLProtocol *protocol = DCB_PROTOCOL(dcb, MySQLProtocol);
MYSQL_session *client_data = (MYSQL_session *)dcb->data;
int auth_ret;
int auth_ret = MXS_AUTH_FAILED;
/**
* We record the SSL status before and after the authentication. This allows
@ -199,24 +250,16 @@ mysql_auth_authenticate(DCB *dcb)
{
auth_ret = (SSL_ERROR_CLIENT_NOT_SSL == ssl_ret) ? MXS_AUTH_FAILED_SSL : MXS_AUTH_FAILED;
}
else if (!health_after)
{
auth_ret = MXS_AUTH_SSL_INCOMPLETE;
}
else if (!health_before && health_after)
{
auth_ret = MXS_AUTH_SSL_INCOMPLETE;
poll_add_epollin_event_to_dcb(dcb, NULL);
}
else if (0 == strlen(client_data->user))
{
auth_ret = MXS_AUTH_FAILED;
}
else
else if (*client_data->user)
{
MXS_DEBUG("Receiving connection from '%s' to database '%s'.",
client_data->user, client_data->db);
@ -226,17 +269,15 @@ mysql_auth_authenticate(DCB *dcb)
MYSQL_AUTH *instance = (MYSQL_AUTH*)dcb->listener->auth_instance;
/* On failed authentication try to load user table from backend database */
/* Success for service_refresh_users returns 0 */
if (MXS_AUTH_SUCCEEDED != auth_ret && !instance->skip_auth &&
0 == service_refresh_users(dcb->service))
bool is_ok = validate_mysql_user(instance->handle, dcb, client_data);
if (!is_ok && !instance->skip_auth && service_refresh_users(dcb->service) == 0)
{
auth_ret = combined_auth_check(dcb, client_data->auth_token, client_data->auth_token_len, protocol,
client_data->user, client_data->client_sha1, client_data->db);
is_ok = validate_mysql_user(instance->handle, dcb, client_data);
}
/* on successful authentication, set user into dcb field */
if (MXS_AUTH_SUCCEEDED == auth_ret || instance->skip_auth)
if (is_ok || instance->skip_auth)
{
auth_ret = MXS_AUTH_SUCCEEDED;
dcb->user = MXS_STRDUP_A(client_data->user);