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/*
* QEMU migration TLS support
*
* Copyright (c) 2015 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "migration/migration.h"
#include "io/channel-tls.h"
#include "crypto/tlscreds.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
#include "trace.h"
static QCryptoTLSCreds *
migration_tls_get_creds(MigrationState *s,
QCryptoTLSCredsEndpoint endpoint,
Error **errp)
{
Object *creds;
QCryptoTLSCreds *ret;
creds = object_resolve_path_component(
object_get_objects_root(), s->parameters.tls_creds);
if (!creds) {
error_setg(errp, "No TLS credentials with id '%s'",
s->parameters.tls_creds);
return NULL;
}
ret = (QCryptoTLSCreds *)object_dynamic_cast(
creds, TYPE_QCRYPTO_TLS_CREDS);
if (!ret) {
error_setg(errp, "Object with id '%s' is not TLS credentials",
s->parameters.tls_creds);
return NULL;
}
if (ret->endpoint != endpoint) {
error_setg(errp,
"Expected TLS credentials for a %s endpoint",
endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT ?
"client" : "server");
return NULL;
}
object_ref(OBJECT(ret));
return ret;
}
static void migration_tls_incoming_handshake(QIOTask *task,
gpointer opaque)
{
QIOChannel *ioc = QIO_CHANNEL(qio_task_get_source(task));
Error *err = NULL;
if (qio_task_propagate_error(task, &err)) {
trace_migration_tls_incoming_handshake_error(error_get_pretty(err));
error_report_err(err);
} else {
trace_migration_tls_incoming_handshake_complete();
migration_channel_process_incoming(migrate_get_current(), ioc);
}
object_unref(OBJECT(ioc));
}
void migration_tls_channel_process_incoming(MigrationState *s,
QIOChannel *ioc,
Error **errp)
{
QCryptoTLSCreds *creds;
QIOChannelTLS *tioc;
creds = migration_tls_get_creds(
s, QCRYPTO_TLS_CREDS_ENDPOINT_SERVER, errp);
if (!creds) {
return;
}
tioc = qio_channel_tls_new_server(
ioc, creds,
NULL, /* XXX pass ACL name */
errp);
if (!tioc) {
return;
}
trace_migration_tls_incoming_handshake_start();
qio_channel_set_name(QIO_CHANNEL(tioc), "migration-tls-incoming");
qio_channel_tls_handshake(tioc,
migration_tls_incoming_handshake,
NULL,
NULL);
}
static void migration_tls_outgoing_handshake(QIOTask *task,
gpointer opaque)
{
MigrationState *s = opaque;
QIOChannel *ioc = QIO_CHANNEL(qio_task_get_source(task));
Error *err = NULL;
if (qio_task_propagate_error(task, &err)) {
trace_migration_tls_outgoing_handshake_error(error_get_pretty(err));
s->to_dst_file = NULL;
migrate_fd_error(s, err);
error_free(err);
} else {
trace_migration_tls_outgoing_handshake_complete();
migration_channel_connect(s, ioc, NULL);
}
object_unref(OBJECT(ioc));
}
void migration_tls_channel_connect(MigrationState *s,
QIOChannel *ioc,
const char *hostname,
Error **errp)
{
QCryptoTLSCreds *creds;
QIOChannelTLS *tioc;
creds = migration_tls_get_creds(
s, QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT, errp);
if (!creds) {
return;
}
if (s->parameters.tls_hostname) {
hostname = s->parameters.tls_hostname;
}
if (!hostname) {
error_setg(errp, "No hostname available for TLS");
return;
}
tioc = qio_channel_tls_new_client(
ioc, creds, hostname, errp);
if (!tioc) {
return;
}
trace_migration_tls_outgoing_handshake_start(hostname);
qio_channel_set_name(QIO_CHANNEL(tioc), "migration-tls-outgoing");
qio_channel_tls_handshake(tioc,
migration_tls_outgoing_handshake,
s,
NULL);
}
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