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Workaround for CONC-469

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If no default authentication plugin was specified and the server sends preferred
authentication method in server hello package client now uses servers preferred
authentication method instead of using mysql_native_password. If no default
authentication plugin was specified and the server didn't send an
authenticatoin method client uses the default mysql_native_password plugin.
This commit is contained in:
Georg Richter
2020-05-25 11:50:04 +02:00
parent cdfecebc99
commit 37a4fd1d6d
2 changed files with 47 additions and 16 deletions
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30
plugins/auth/my_auth.c
View File

@@ -547,39 +547,37 @@ static void client_mpvio_info(MYSQL_PLUGIN_VIO *vio,
int run_plugin_auth(MYSQL *mysql, char *data, uint data_len,
const char *data_plugin, const char *db)
{
const char *auth_plugin_name;
const char *auth_plugin_name= NULL;
auth_plugin_t *auth_plugin;
MCPVIO_EXT mpvio;
ulong pkt_length;
int res;
/* determine the default/initial plugin to use */
if (mysql->options.extension && mysql->options.extension->default_auth &&
mysql->server_capabilities & CLIENT_PLUGIN_AUTH)
if (mysql->server_capabilities & CLIENT_PLUGIN_AUTH)
{
auth_plugin_name= mysql->options.extension->default_auth;
if (!(auth_plugin= (auth_plugin_t*) mysql_client_find_plugin(mysql,
auth_plugin_name, MYSQL_CLIENT_AUTHENTICATION_PLUGIN)))
auth_plugin= &dummy_fallback_client_plugin;
if (mysql->options.extension && mysql->options.extension->default_auth)
auth_plugin_name= mysql->options.extension->default_auth;
else if (data_plugin)
auth_plugin_name= data_plugin;
}
else
if (!auth_plugin_name)
{
if (mysql->server_capabilities & CLIENT_PROTOCOL_41)
auth_plugin= &mysql_native_password_client_plugin;
auth_plugin_name= native_password_plugin_name;
else
{
if (!(auth_plugin= (auth_plugin_t*)mysql_client_find_plugin(mysql,
"mysql_old_password", MYSQL_CLIENT_AUTHENTICATION_PLUGIN)))
auth_plugin= &dummy_fallback_client_plugin;
}
auth_plugin_name= auth_plugin->name;
auth_plugin_name= "mysql_old_password";
}
if (!(auth_plugin= (auth_plugin_t*) mysql_client_find_plugin(mysql,
auth_plugin_name, MYSQL_CLIENT_AUTHENTICATION_PLUGIN)))
auth_plugin= &dummy_fallback_client_plugin;
mysql->net.last_errno= 0; /* just in case */
if (data_plugin && strcmp(data_plugin, auth_plugin_name))
{
/* data was prepared for a different plugin, don't show it to this one */
/* data was prepared for a different plugin, so we don't
send any data */
data= 0;
data_len= 0;
}

33
unittest/libmariadb/connection.c
View File

@@ -1730,7 +1730,40 @@ static int test_conc443(MYSQL *my __attribute__((unused)))
return OK;
}
static int test_default_auth(MYSQL *my __attribute__((unused)))
{
MYSQL *mysql;
if (!is_mariadb)
return SKIP;
mysql= mysql_init(NULL);
mysql_options(mysql, MYSQL_DEFAULT_AUTH, "mysql_clear_password");
if (!mysql_real_connect(mysql, hostname, username, password, schema, port, socketname, CLIENT_REMEMBER_OPTIONS))
{
diag("Connection failed. Error: %s", mysql_error(mysql));
mysql_close(mysql);
return FAIL;
}
mysql_close(mysql);
mysql= mysql_init(NULL);
mysql_options(mysql, MYSQL_DEFAULT_AUTH, "caching_sha2_password");
if (!mysql_real_connect(mysql, hostname, username, password, schema, port, socketname, CLIENT_REMEMBER_OPTIONS))
{
diag("Connection failed. Error: %s", mysql_error(mysql));
mysql_close(mysql);
return FAIL;
}
mysql_close(mysql);
return OK;
}
struct my_tests_st my_tests[] = {
{"test_default_auth", test_default_auth, TEST_CONNECTION_NONE, 0, NULL, NULL},
{"test_conc443", test_conc443, TEST_CONNECTION_NONE, 0, NULL, NULL},
{"test_conc366", test_conc366, TEST_CONNECTION_DEFAULT, 0, NULL, NULL},
{"test_conc392", test_conc392, TEST_CONNECTION_DEFAULT, 0, NULL, NULL},