13e230dd2SCorentin Chary /*
23e230dd2SCorentin Chary * QEMU VNC display driver: VeNCrypt authentication setup
33e230dd2SCorentin Chary *
43e230dd2SCorentin Chary * Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>
53e230dd2SCorentin Chary * Copyright (C) 2006 Fabrice Bellard
63e230dd2SCorentin Chary * Copyright (C) 2009 Red Hat, Inc
73e230dd2SCorentin Chary *
83e230dd2SCorentin Chary * Permission is hereby granted, free of charge, to any person obtaining a copy
93e230dd2SCorentin Chary * of this software and associated documentation files (the "Software"), to deal
103e230dd2SCorentin Chary * in the Software without restriction, including without limitation the rights
113e230dd2SCorentin Chary * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
123e230dd2SCorentin Chary * copies of the Software, and to permit persons to whom the Software is
133e230dd2SCorentin Chary * furnished to do so, subject to the following conditions:
143e230dd2SCorentin Chary *
153e230dd2SCorentin Chary * The above copyright notice and this permission notice shall be included in
163e230dd2SCorentin Chary * all copies or substantial portions of the Software.
173e230dd2SCorentin Chary *
183e230dd2SCorentin Chary * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
193e230dd2SCorentin Chary * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
203e230dd2SCorentin Chary * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
213e230dd2SCorentin Chary * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
223e230dd2SCorentin Chary * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
233e230dd2SCorentin Chary * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
243e230dd2SCorentin Chary * THE SOFTWARE.
253e230dd2SCorentin Chary */
263e230dd2SCorentin Chary
27e16f4c87SPeter Maydell #include "qemu/osdep.h"
283e230dd2SCorentin Chary #include "vnc.h"
29da34e65cSMarkus Armbruster #include "qapi/error.h"
306a1751b7SAlex Bligh #include "qemu/main-loop.h"
31ad6374c4SDaniel P. Berrange #include "trace.h"
323e230dd2SCorentin Chary
start_auth_vencrypt_subauth(VncState * vs)333e230dd2SCorentin Chary static void start_auth_vencrypt_subauth(VncState *vs)
343e230dd2SCorentin Chary {
357e7e2ebcSDaniel P. Berrange switch (vs->subauth) {
363e230dd2SCorentin Chary case VNC_AUTH_VENCRYPT_TLSNONE:
373e230dd2SCorentin Chary case VNC_AUTH_VENCRYPT_X509NONE:
383e230dd2SCorentin Chary vnc_write_u32(vs, 0); /* Accept auth completion */
393e230dd2SCorentin Chary start_client_init(vs);
403e230dd2SCorentin Chary break;
413e230dd2SCorentin Chary
423e230dd2SCorentin Chary case VNC_AUTH_VENCRYPT_TLSVNC:
433e230dd2SCorentin Chary case VNC_AUTH_VENCRYPT_X509VNC:
443e230dd2SCorentin Chary start_auth_vnc(vs);
453e230dd2SCorentin Chary break;
463e230dd2SCorentin Chary
473e230dd2SCorentin Chary #ifdef CONFIG_VNC_SASL
483e230dd2SCorentin Chary case VNC_AUTH_VENCRYPT_TLSSASL:
493e230dd2SCorentin Chary case VNC_AUTH_VENCRYPT_X509SASL:
500ed8b6f6SBlue Swirl start_auth_sasl(vs);
510ed8b6f6SBlue Swirl break;
523e230dd2SCorentin Chary #endif /* CONFIG_VNC_SASL */
533e230dd2SCorentin Chary
543e230dd2SCorentin Chary default: /* Should not be possible, but just in case */
557364dbdaSDaniel P. Berrange trace_vnc_auth_fail(vs, vs->auth, "Unhandled VeNCrypt subauth", "");
563e230dd2SCorentin Chary vnc_write_u8(vs, 1);
573e230dd2SCorentin Chary if (vs->minor >= 8) {
583e230dd2SCorentin Chary static const char err[] = "Unsupported authentication type";
593e230dd2SCorentin Chary vnc_write_u32(vs, sizeof(err));
603e230dd2SCorentin Chary vnc_write(vs, err, sizeof(err));
613e230dd2SCorentin Chary }
623e230dd2SCorentin Chary vnc_client_error(vs);
633e230dd2SCorentin Chary }
643e230dd2SCorentin Chary }
653e230dd2SCorentin Chary
vnc_tls_handshake_done(QIOTask * task,gpointer user_data)6660e705c5SDaniel P. Berrange static void vnc_tls_handshake_done(QIOTask *task,
672cc45228SDaniel P. Berrange gpointer user_data)
68494cb817SChih-Min Chao {
692cc45228SDaniel P. Berrange VncState *vs = user_data;
7060e705c5SDaniel P. Berrange Error *err = NULL;
713e230dd2SCorentin Chary
7260e705c5SDaniel P. Berrange if (qio_task_propagate_error(task, &err)) {
737364dbdaSDaniel P. Berrange trace_vnc_auth_fail(vs, vs->auth, "TLS handshake failed",
742cc45228SDaniel P. Berrange error_get_pretty(err));
752cc45228SDaniel P. Berrange vnc_client_error(vs);
7660e705c5SDaniel P. Berrange error_free(err);
772cc45228SDaniel P. Berrange } else {
78a75d6f07SBrandon Carpenter if (vs->ioc_tag) {
79a75d6f07SBrandon Carpenter g_source_remove(vs->ioc_tag);
80a75d6f07SBrandon Carpenter }
8104d2529dSDaniel P. Berrange vs->ioc_tag = qio_channel_add_watch(
82*2ddafce7SDing Hui vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_OUT,
83*2ddafce7SDing Hui vnc_client_io, vs, NULL);
843e230dd2SCorentin Chary start_auth_vencrypt_subauth(vs);
8504d2529dSDaniel P. Berrange }
863e230dd2SCorentin Chary }
873e230dd2SCorentin Chary
883e230dd2SCorentin Chary
protocol_client_vencrypt_auth(VncState * vs,uint8_t * data,size_t len)893e230dd2SCorentin Chary static int protocol_client_vencrypt_auth(VncState *vs, uint8_t *data, size_t len)
903e230dd2SCorentin Chary {
913e230dd2SCorentin Chary int auth = read_u32(data, 0);
923e230dd2SCorentin Chary
937364dbdaSDaniel P. Berrange trace_vnc_auth_vencrypt_subauth(vs, auth);
947e7e2ebcSDaniel P. Berrange if (auth != vs->subauth) {
957364dbdaSDaniel P. Berrange trace_vnc_auth_fail(vs, vs->auth, "Unsupported sub-auth version", "");
963e230dd2SCorentin Chary vnc_write_u8(vs, 0); /* Reject auth */
973e230dd2SCorentin Chary vnc_flush(vs);
983e230dd2SCorentin Chary vnc_client_error(vs);
993e230dd2SCorentin Chary } else {
1003e305e4aSDaniel P. Berrange Error *err = NULL;
1012cc45228SDaniel P. Berrange QIOChannelTLS *tls;
1023e230dd2SCorentin Chary vnc_write_u8(vs, 1); /* Accept auth */
1033e230dd2SCorentin Chary vnc_flush(vs);
1043e230dd2SCorentin Chary
1052cc45228SDaniel P. Berrange if (vs->ioc_tag) {
1062cc45228SDaniel P. Berrange g_source_remove(vs->ioc_tag);
1072cc45228SDaniel P. Berrange vs->ioc_tag = 0;
1082cc45228SDaniel P. Berrange }
1092cc45228SDaniel P. Berrange
1102cc45228SDaniel P. Berrange tls = qio_channel_tls_new_server(
1112cc45228SDaniel P. Berrange vs->ioc,
1122cc45228SDaniel P. Berrange vs->vd->tlscreds,
113b76806d4SDaniel P. Berrange vs->vd->tlsauthzid,
1143e305e4aSDaniel P. Berrange &err);
1152cc45228SDaniel P. Berrange if (!tls) {
1167364dbdaSDaniel P. Berrange trace_vnc_auth_fail(vs, vs->auth, "TLS setup failed",
1177364dbdaSDaniel P. Berrange error_get_pretty(err));
1183e305e4aSDaniel P. Berrange error_free(err);
1193e305e4aSDaniel P. Berrange vnc_client_error(vs);
1203e230dd2SCorentin Chary return 0;
1213e230dd2SCorentin Chary }
1223e230dd2SCorentin Chary
12310bcfe58SDaniel P. Berrange qio_channel_set_name(QIO_CHANNEL(tls), "vnc-server-tls");
1242cc45228SDaniel P. Berrange object_unref(OBJECT(vs->ioc));
1252cc45228SDaniel P. Berrange vs->ioc = QIO_CHANNEL(tls);
126ad6374c4SDaniel P. Berrange trace_vnc_client_io_wrap(vs, vs->ioc, "tls");
1272cc45228SDaniel P. Berrange vs->tls = qio_channel_tls_get_session(tls);
1282cc45228SDaniel P. Berrange
1292cc45228SDaniel P. Berrange qio_channel_tls_handshake(tls,
1302cc45228SDaniel P. Berrange vnc_tls_handshake_done,
1312cc45228SDaniel P. Berrange vs,
1321939ccdaSPeter Xu NULL,
1332cc45228SDaniel P. Berrange NULL);
1343e230dd2SCorentin Chary }
1353e230dd2SCorentin Chary return 0;
1363e230dd2SCorentin Chary }
1373e230dd2SCorentin Chary
protocol_client_vencrypt_init(VncState * vs,uint8_t * data,size_t len)1383e230dd2SCorentin Chary static int protocol_client_vencrypt_init(VncState *vs, uint8_t *data, size_t len)
1393e230dd2SCorentin Chary {
1407364dbdaSDaniel P. Berrange trace_vnc_auth_vencrypt_version(vs, (int)data[0], (int)data[1]);
1413e230dd2SCorentin Chary if (data[0] != 0 ||
1423e230dd2SCorentin Chary data[1] != 2) {
1437364dbdaSDaniel P. Berrange trace_vnc_auth_fail(vs, vs->auth, "Unsupported version", "");
1443e230dd2SCorentin Chary vnc_write_u8(vs, 1); /* Reject version */
1453e230dd2SCorentin Chary vnc_flush(vs);
1463e230dd2SCorentin Chary vnc_client_error(vs);
1473e230dd2SCorentin Chary } else {
1483e230dd2SCorentin Chary vnc_write_u8(vs, 0); /* Accept version */
1493e230dd2SCorentin Chary vnc_write_u8(vs, 1); /* Number of sub-auths */
1507e7e2ebcSDaniel P. Berrange vnc_write_u32(vs, vs->subauth); /* The supported auth */
1513e230dd2SCorentin Chary vnc_flush(vs);
1523e230dd2SCorentin Chary vnc_read_when(vs, protocol_client_vencrypt_auth, 4);
1533e230dd2SCorentin Chary }
1543e230dd2SCorentin Chary return 0;
1553e230dd2SCorentin Chary }
1563e230dd2SCorentin Chary
1573e230dd2SCorentin Chary
start_auth_vencrypt(VncState * vs)1583e230dd2SCorentin Chary void start_auth_vencrypt(VncState *vs)
1593e230dd2SCorentin Chary {
1603e230dd2SCorentin Chary /* Send VeNCrypt version 0.2 */
1613e230dd2SCorentin Chary vnc_write_u8(vs, 0);
1623e230dd2SCorentin Chary vnc_write_u8(vs, 2);
1633e230dd2SCorentin Chary
1643e230dd2SCorentin Chary vnc_read_when(vs, protocol_client_vencrypt_init, 2);
1653e230dd2SCorentin Chary }
1663e230dd2SCorentin Chary
167