Update version for v7.1.0-rc3 release
[qemu.git] / migration / tls.c
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 2.1 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 "crypto/tlscreds.h"
26 #include "qemu/error-report.h"
27 #include "qapi/error.h"
28 #include "trace.h"
29
30 static QCryptoTLSCreds *
31 migration_tls_get_creds(MigrationState *s,
32 QCryptoTLSCredsEndpoint endpoint,
33 Error **errp)
34 {
35 Object *creds;
36 QCryptoTLSCreds *ret;
37
38 creds = object_resolve_path_component(
39 object_get_objects_root(), s->parameters.tls_creds);
40 if (!creds) {
41 error_setg(errp, "No TLS credentials with id '%s'",
42 s->parameters.tls_creds);
43 return NULL;
44 }
45 ret = (QCryptoTLSCreds *)object_dynamic_cast(
46 creds, TYPE_QCRYPTO_TLS_CREDS);
47 if (!ret) {
48 error_setg(errp, "Object with id '%s' is not TLS credentials",
49 s->parameters.tls_creds);
50 return NULL;
51 }
52 if (!qcrypto_tls_creds_check_endpoint(ret, endpoint, errp)) {
53 return NULL;
54 }
55
56 return ret;
57 }
58
59
60 static void migration_tls_incoming_handshake(QIOTask *task,
61 gpointer opaque)
62 {
63 QIOChannel *ioc = QIO_CHANNEL(qio_task_get_source(task));
64 Error *err = NULL;
65
66 if (qio_task_propagate_error(task, &err)) {
67 trace_migration_tls_incoming_handshake_error(error_get_pretty(err));
68 error_report_err(err);
69 } else {
70 trace_migration_tls_incoming_handshake_complete();
71 migration_channel_process_incoming(ioc);
72 }
73 object_unref(OBJECT(ioc));
74 }
75
76 void migration_tls_channel_process_incoming(MigrationState *s,
77 QIOChannel *ioc,
78 Error **errp)
79 {
80 QCryptoTLSCreds *creds;
81 QIOChannelTLS *tioc;
82
83 creds = migration_tls_get_creds(
84 s, QCRYPTO_TLS_CREDS_ENDPOINT_SERVER, errp);
85 if (!creds) {
86 return;
87 }
88
89 tioc = qio_channel_tls_new_server(
90 ioc, creds,
91 s->parameters.tls_authz,
92 errp);
93 if (!tioc) {
94 return;
95 }
96
97 trace_migration_tls_incoming_handshake_start();
98 qio_channel_set_name(QIO_CHANNEL(tioc), "migration-tls-incoming");
99 qio_channel_tls_handshake(tioc,
100 migration_tls_incoming_handshake,
101 NULL,
102 NULL,
103 NULL);
104 }
105
106
107 static void migration_tls_outgoing_handshake(QIOTask *task,
108 gpointer opaque)
109 {
110 MigrationState *s = opaque;
111 QIOChannel *ioc = QIO_CHANNEL(qio_task_get_source(task));
112 Error *err = NULL;
113
114 if (qio_task_propagate_error(task, &err)) {
115 trace_migration_tls_outgoing_handshake_error(error_get_pretty(err));
116 } else {
117 trace_migration_tls_outgoing_handshake_complete();
118 }
119 migration_channel_connect(s, ioc, NULL, err);
120 object_unref(OBJECT(ioc));
121 }
122
123 QIOChannelTLS *migration_tls_client_create(MigrationState *s,
124 QIOChannel *ioc,
125 const char *hostname,
126 Error **errp)
127 {
128 QCryptoTLSCreds *creds;
129 QIOChannelTLS *tioc;
130
131 creds = migration_tls_get_creds(
132 s, QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT, errp);
133 if (!creds) {
134 return NULL;
135 }
136
137 if (s->parameters.tls_hostname && *s->parameters.tls_hostname) {
138 hostname = s->parameters.tls_hostname;
139 }
140 if (!hostname) {
141 error_setg(errp, "No hostname available for TLS");
142 return NULL;
143 }
144
145 tioc = qio_channel_tls_new_client(
146 ioc, creds, hostname, errp);
147
148 return tioc;
149 }
150
151 void migration_tls_channel_connect(MigrationState *s,
152 QIOChannel *ioc,
153 const char *hostname,
154 Error **errp)
155 {
156 QIOChannelTLS *tioc;
157
158 tioc = migration_tls_client_create(s, ioc, hostname, errp);
159 if (!tioc) {
160 return;
161 }
162
163 /* Save hostname into MigrationState for handshake */
164 s->hostname = g_strdup(hostname);
165 trace_migration_tls_outgoing_handshake_start(hostname);
166 qio_channel_set_name(QIO_CHANNEL(tioc), "migration-tls-outgoing");
167 qio_channel_tls_handshake(tioc,
168 migration_tls_outgoing_handshake,
169 s,
170 NULL,
171 NULL);
172 }