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
|
/* Copyright (C) 2020 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 as published by the Free
* Software Foundation.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/**
* \file
*
* \author Philippe Antoine <p.antoine@catenacyber.fr>
*
* Parser for HTTP2, RFC 7540
*/
#include "suricata-common.h"
#include "stream.h"
#include "conf.h"
#include "util-unittest.h"
#include "app-layer-detect-proto.h"
#include "app-layer-parser.h"
#include "app-layer-htp.h"
#include "app-layer-http2.h"
#include "rust.h"
static int HTTP2RegisterPatternsForProtocolDetection(void)
{
/* Using the 24 bytes pattern makes AppLayerTest09 fail/leak
* The complete pattern is "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n"
*/
if (AppLayerProtoDetectPMRegisterPatternCI(IPPROTO_TCP, ALPROTO_HTTP2,
"PRI * HTTP/2.0\r\n",
16, 0, STREAM_TOSERVER) < 0)
{
return -1;
}
return 0;
}
static StreamingBufferConfig sbcfg = STREAMING_BUFFER_CONFIG_INITIALIZER;
static SuricataFileContext sfc = { &sbcfg };
void RegisterHTTP2Parsers(void)
{
const char *proto_name = "http2";
if (AppLayerProtoDetectConfProtoDetectionEnabledDefault("tcp", proto_name, true)) {
AppLayerProtoDetectRegisterProtocol(ALPROTO_HTTP2, proto_name);
if (HTTP2RegisterPatternsForProtocolDetection() < 0)
return;
rs_http2_init(&sfc);
rs_http2_register_parser();
}
#ifdef UNITTESTS
//TODOask HTTP2ParserRegisterTests();
#endif
}
void HTTP2MimicHttp1Request(void *alstate_orig, void *h2s)
{
htp_tx_t *h1tx = HtpGetTxForH2(alstate_orig);
if (h2s == NULL || h1tx == NULL) {
return;
}
if (h1tx->request_method == NULL) {
// may happen if we only got the reply, not the HTTP1 request
return;
}
// else
rs_http2_tx_set_method(h2s, bstr_ptr(h1tx->request_method), bstr_len(h1tx->request_method));
if (h1tx->request_uri != NULL) {
// A request line without spaces gets interpreted as a request_method
// and has request_uri=NULL
rs_http2_tx_set_uri(h2s, bstr_ptr(h1tx->request_uri), bstr_len(h1tx->request_uri));
}
size_t nbheaders = htp_table_size(h1tx->request_headers);
for (size_t i = 0; i < nbheaders; i++) {
htp_header_t *h = htp_table_get_index(h1tx->request_headers, i, NULL);
rs_http2_tx_add_header(
h2s, bstr_ptr(h->name), bstr_len(h->name), bstr_ptr(h->value), bstr_len(h->value));
}
}
|
