aboutsummaryrefslogtreecommitdiff
path: root/migration/tls.c
blob: bae9acad6cecd71b80ce3b7630a27503e4d8a7b8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
/*
 * 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 "channel.h"
#include "migration/migration.h"
#include "tls.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));
        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 && *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);
}