/* * 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 2.1 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 "channel.h" #include "migration.h" #include "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; } 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(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, s->parameters.tls_authz, 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, 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)); } else { trace_migration_tls_outgoing_handshake_complete(); } migration_channel_connect(s, ioc, NULL, err); object_unref(OBJECT(ioc)); } QIOChannelTLS *migration_tls_client_create(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 NULL; } if (s->parameters.tls_hostname && *s->parameters.tls_hostname) { hostname = s->parameters.tls_hostname; } if (!hostname) { error_setg(errp, "No hostname available for TLS"); return NULL; } tioc = qio_channel_tls_new_client( ioc, creds, hostname, errp); return tioc; } void migration_tls_channel_connect(MigrationState *s, QIOChannel *ioc, const char *hostname, Error **errp) { QIOChannelTLS *tioc; tioc = migration_tls_client_create(s, ioc, hostname, errp); if (!tioc) { return; } /* Save hostname into MigrationState for handshake */ s->hostname = g_strdup(hostname); 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, NULL); }