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100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
/* Copyright (C) 2020 Open Information Security Foundation
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*
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* You can copy, redistribute or modify this Program under the terms of
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* the GNU General Public License version 2 as published by the Free
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* Software Foundation.
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*
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* This program 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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* version 2 along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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/**
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* \file
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*
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* \author Philippe Antoine <p.antoine@catenacyber.fr>
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*
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* Parser for HTTP2, RFC 7540
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*/
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#include "suricata-common.h"
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#include "stream.h"
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#include "conf.h"
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#include "util-unittest.h"
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#include "app-layer-detect-proto.h"
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#include "app-layer-parser.h"
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#include "app-layer-htp.h"
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#include "app-layer-http2.h"
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#include "rust.h"
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static int HTTP2RegisterPatternsForProtocolDetection(void)
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{
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/* Using the 24 bytes pattern makes AppLayerTest09 fail/leak
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* The complete pattern is "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n"
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*/
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if (AppLayerProtoDetectPMRegisterPatternCI(IPPROTO_TCP, ALPROTO_HTTP2,
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"PRI * HTTP/2.0\r\n",
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16, 0, STREAM_TOSERVER) < 0)
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{
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return -1;
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}
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return 0;
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}
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static StreamingBufferConfig sbcfg = STREAMING_BUFFER_CONFIG_INITIALIZER;
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static SuricataFileContext sfc = { &sbcfg };
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void RegisterHTTP2Parsers(void)
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{
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const char *proto_name = "http2";
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if (AppLayerProtoDetectConfProtoDetectionEnabledDefault("tcp", proto_name, true)) {
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AppLayerProtoDetectRegisterProtocol(ALPROTO_HTTP2, proto_name);
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if (HTTP2RegisterPatternsForProtocolDetection() < 0)
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return;
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SCHttp2Init(&sfc);
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SCRegisterHttp2Parser();
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}
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#ifdef UNITTESTS
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//TODOask HTTP2ParserRegisterTests();
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#endif
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}
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void HTTP2MimicHttp1Request(void *alstate_orig, void *h2s)
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{
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htp_tx_t *h1tx = HtpGetTxForH2(alstate_orig);
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if (h2s == NULL || h1tx == NULL) {
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return;
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}
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if (htp_tx_request_method(h1tx) == NULL) {
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// may happen if we only got the reply, not the HTTP1 request
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return;
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}
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// else
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SCHttp2TxSetMethod(h2s, bstr_ptr(htp_tx_request_method(h1tx)),
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(uint32_t)bstr_len(htp_tx_request_method(h1tx)));
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if (htp_tx_request_uri(h1tx) != NULL) {
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// A request line without spaces gets interpreted as a request_method
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// and has request_uri=NULL
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SCHttp2TxSetUri(h2s, bstr_ptr(htp_tx_request_uri(h1tx)),
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(uint32_t)bstr_len(htp_tx_request_uri(h1tx)));
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}
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size_t nbheaders = htp_tx_request_headers_size(h1tx);
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for (size_t i = 0; i < nbheaders; i++) {
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const htp_header_t *h = htp_tx_request_header_index(h1tx, i);
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SCHttp2TxAddHeader(h2s, htp_header_name_ptr(h), (uint32_t)htp_header_name_len(h),
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htp_header_value_ptr(h), (uint32_t)htp_header_value_len(h));
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}
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}
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