1 /* 2 * QEMU migration TLS support 3 * 4 * Copyright (c) 2015 Red Hat, Inc. 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 * 19 */ 20 21 #include "qemu/osdep.h" 22 #include "channel.h" 23 #include "migration.h" 24 #include "tls.h" 25 #include "io/channel-tls.h" 26 #include "crypto/tlscreds.h" 27 #include "qemu/error-report.h" 28 #include "qapi/error.h" 29 #include "trace.h" 30 31 static QCryptoTLSCreds * 32 migration_tls_get_creds(MigrationState *s, 33 QCryptoTLSCredsEndpoint endpoint, 34 Error **errp) 35 { 36 Object *creds; 37 QCryptoTLSCreds *ret; 38 39 creds = object_resolve_path_component( 40 object_get_objects_root(), s->parameters.tls_creds); 41 if (!creds) { 42 error_setg(errp, "No TLS credentials with id '%s'", 43 s->parameters.tls_creds); 44 return NULL; 45 } 46 ret = (QCryptoTLSCreds *)object_dynamic_cast( 47 creds, TYPE_QCRYPTO_TLS_CREDS); 48 if (!ret) { 49 error_setg(errp, "Object with id '%s' is not TLS credentials", 50 s->parameters.tls_creds); 51 return NULL; 52 } 53 if (ret->endpoint != endpoint) { 54 error_setg(errp, 55 "Expected TLS credentials for a %s endpoint", 56 endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT ? 57 "client" : "server"); 58 return NULL; 59 } 60 61 return ret; 62 } 63 64 65 static void migration_tls_incoming_handshake(QIOTask *task, 66 gpointer opaque) 67 { 68 QIOChannel *ioc = QIO_CHANNEL(qio_task_get_source(task)); 69 Error *err = NULL; 70 71 if (qio_task_propagate_error(task, &err)) { 72 trace_migration_tls_incoming_handshake_error(error_get_pretty(err)); 73 error_report_err(err); 74 } else { 75 trace_migration_tls_incoming_handshake_complete(); 76 migration_channel_process_incoming(ioc); 77 } 78 object_unref(OBJECT(ioc)); 79 } 80 81 void migration_tls_channel_process_incoming(MigrationState *s, 82 QIOChannel *ioc, 83 Error **errp) 84 { 85 QCryptoTLSCreds *creds; 86 QIOChannelTLS *tioc; 87 88 creds = migration_tls_get_creds( 89 s, QCRYPTO_TLS_CREDS_ENDPOINT_SERVER, errp); 90 if (!creds) { 91 return; 92 } 93 94 tioc = qio_channel_tls_new_server( 95 ioc, creds, 96 s->parameters.tls_authz, 97 errp); 98 if (!tioc) { 99 return; 100 } 101 102 trace_migration_tls_incoming_handshake_start(); 103 qio_channel_set_name(QIO_CHANNEL(tioc), "migration-tls-incoming"); 104 qio_channel_tls_handshake(tioc, 105 migration_tls_incoming_handshake, 106 NULL, 107 NULL, 108 NULL); 109 } 110 111 112 static void migration_tls_outgoing_handshake(QIOTask *task, 113 gpointer opaque) 114 { 115 MigrationState *s = opaque; 116 QIOChannel *ioc = QIO_CHANNEL(qio_task_get_source(task)); 117 Error *err = NULL; 118 119 if (qio_task_propagate_error(task, &err)) { 120 trace_migration_tls_outgoing_handshake_error(error_get_pretty(err)); 121 } else { 122 trace_migration_tls_outgoing_handshake_complete(); 123 } 124 migration_channel_connect(s, ioc, NULL, err); 125 object_unref(OBJECT(ioc)); 126 } 127 128 129 void migration_tls_channel_connect(MigrationState *s, 130 QIOChannel *ioc, 131 const char *hostname, 132 Error **errp) 133 { 134 QCryptoTLSCreds *creds; 135 QIOChannelTLS *tioc; 136 137 creds = migration_tls_get_creds( 138 s, QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT, errp); 139 if (!creds) { 140 return; 141 } 142 143 if (s->parameters.tls_hostname && *s->parameters.tls_hostname) { 144 hostname = s->parameters.tls_hostname; 145 } 146 if (!hostname) { 147 error_setg(errp, "No hostname available for TLS"); 148 return; 149 } 150 151 tioc = qio_channel_tls_new_client( 152 ioc, creds, hostname, errp); 153 if (!tioc) { 154 return; 155 } 156 157 trace_migration_tls_outgoing_handshake_start(hostname); 158 qio_channel_set_name(QIO_CHANNEL(tioc), "migration-tls-outgoing"); 159 qio_channel_tls_handshake(tioc, 160 migration_tls_outgoing_handshake, 161 s, 162 NULL, 163 NULL); 164 } 165