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3e305e4a47
Switch VNC server over to using the QCryptoTLSSession object for the TLS session. This removes the direct use of gnutls from the VNC server code. It also removes most knowledge about TLS certificate handling from the VNC server code. This has the nice effect that all the CONFIG_VNC_TLS conditionals go away and the user gets an actual error message when requesting TLS instead of it being silently ignored. With this change, the existing configuration options for enabling TLS with -vnc are deprecated. Old syntax for anon-DH credentials: -vnc hostname:0,tls New syntax: -object tls-creds-anon,id=tls0,endpoint=server \ -vnc hostname:0,tls-creds=tls0 Old syntax for x509 credentials, no client certs: -vnc hostname:0,tls,x509=/path/to/certs New syntax: -object tls-creds-x509,id=tls0,dir=/path/to/certs,endpoint=server,verify-peer=no \ -vnc hostname:0,tls-creds=tls0 Old syntax for x509 credentials, requiring client certs: -vnc hostname:0,tls,x509verify=/path/to/certs New syntax: -object tls-creds-x509,id=tls0,dir=/path/to/certs,endpoint=server,verify-peer=yes \ -vnc hostname:0,tls-creds=tls0 This aligns VNC with the way TLS credentials are to be configured in the future for chardev, nbd and migration backends. It also has the benefit that the same TLS credentials can be shared across multiple VNC server instances, if desired. If someone uses the deprecated syntax, it will internally result in the creation of a 'tls-creds' object with an ID based on the VNC server ID. This allows backwards compat with the CLI syntax, while still deleting all the original TLS code from the VNC server. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/*
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* QEMU VNC display driver: Websockets support
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*
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* Copyright (C) 2010 Joel Martin
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* Copyright (C) 2012 Tim Hardeck
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __QEMU_UI_VNC_WS_H
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#define __QEMU_UI_VNC_WS_H
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#define B64LEN(__x) (((__x + 2) / 3) * 12 / 3)
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#define SHA1_DIGEST_LEN 20
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#define WS_ACCEPT_LEN (B64LEN(SHA1_DIGEST_LEN) + 1)
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#define WS_CLIENT_KEY_LEN 24
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#define WS_GUID "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
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#define WS_GUID_LEN strlen(WS_GUID)
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#define WS_HANDSHAKE "HTTP/1.1 101 Switching Protocols\r\n\
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Upgrade: websocket\r\n\
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Connection: Upgrade\r\n\
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Sec-WebSocket-Accept: %s\r\n\
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Sec-WebSocket-Protocol: binary\r\n\
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\r\n"
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#define WS_HANDSHAKE_DELIM "\r\n"
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#define WS_HANDSHAKE_END "\r\n\r\n"
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#define WS_SUPPORTED_VERSION "13"
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#define WS_HEAD_MIN_LEN sizeof(uint16_t)
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#define WS_HEAD_MAX_LEN (WS_HEAD_MIN_LEN + sizeof(uint64_t) + sizeof(uint32_t))
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typedef union WsMask {
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char c[4];
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uint32_t u;
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} WsMask;
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typedef struct QEMU_PACKED WsHeader {
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unsigned char b0;
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unsigned char b1;
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union {
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struct QEMU_PACKED {
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uint16_t l16;
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WsMask m16;
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} s16;
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struct QEMU_PACKED {
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uint64_t l64;
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WsMask m64;
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} s64;
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WsMask m;
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} u;
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} WsHeader;
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enum {
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WS_OPCODE_CONTINUATION = 0x0,
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WS_OPCODE_TEXT_FRAME = 0x1,
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WS_OPCODE_BINARY_FRAME = 0x2,
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WS_OPCODE_CLOSE = 0x8,
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WS_OPCODE_PING = 0x9,
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WS_OPCODE_PONG = 0xA
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};
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void vncws_tls_handshake_io(void *opaque);
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void vncws_handshake_read(void *opaque);
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long vnc_client_write_ws(VncState *vs);
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long vnc_client_read_ws(VncState *vs);
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void vncws_process_handshake(VncState *vs, uint8_t *line, size_t size);
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void vncws_encode_frame(Buffer *output, const void *payload,
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const size_t payload_size);
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int vncws_decode_frame_header(Buffer *input,
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size_t *header_size,
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size_t *payload_remain,
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WsMask *payload_mask);
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int vncws_decode_frame_payload(Buffer *input,
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size_t *payload_remain, WsMask *payload_mask,
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uint8_t **payload, size_t *payload_size);
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#endif /* __QEMU_UI_VNC_WS_H */
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