23374838686

Committed 21 Mar 2026 07:29AM UTC coverage: 59.341% (-20.0%) from 79.315%

Build # 23374838686

Build Type

Pull #15075

github

Committed by

web-flow

Commit Message

Merge 90b4e834f into 6587e363a

Pull Request Pull Request #15075: Stack 8001 v16.4

Coverage Stats

38 of 70 new or added lines in 10 files covered. (54.29%)

34165 existing lines in 563 files now uncovered.

119621 of 201584 relevant lines covered (59.34%)

650666.92 hits per line

Source File
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92.97

/src/detect-http-header-names.c

/* Copyright (C) 2007-2017 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.
 */

/**
 * \ingroup httplayer
 *
 * @{
 */


/**
 * \file
 *
 * \author Victor Julien <victor@inliniac.net>
 *
 * Implements support http_header_names
 */

#include "suricata-common.h"
#include "threads.h"
#include "decode.h"

#include "detect.h"
#include "detect-parse.h"
#include "detect-engine.h"
#include "detect-engine-buffer.h"
#include "detect-engine-mpm.h"
#include "detect-engine-state.h"
#include "detect-engine-prefilter.h"
#include "detect-engine-content-inspection.h"
#include "detect-content.h"
#include "detect-pcre.h"
#include "detect-http-header-common.h"
#include "detect-http-header-names.h"

#include "flow.h"
#include "flow-var.h"
#include "flow-util.h"

#include "util-debug.h"
#include "util-unittest.h"
#include "util-unittest-helper.h"
#include "util-spm.h"
#include "util-print.h"

#include "app-layer.h"
#include "app-layer-parser.h"

#include "app-layer-htp.h"
#include "detect-http-header.h"
#include "stream-tcp.h"

#define KEYWORD_NAME "http.header_names"
#define KEYWORD_NAME_LEGACY "http_header_names"
#define KEYWORD_DOC "http-keywords.html#http-header-names"
#define BUFFER_NAME "http_header_names"
#define BUFFER_DESC "http header names"
static int g_buffer_id = 0;
static int g_keyword_thread_id = 0;
static int g_http2_thread_id = 0;

#define BUFFER_SIZE_STEP    256
static HttpHeaderThreadDataConfig g_td_config = { BUFFER_SIZE_STEP };

static uint8_t *GetBufferForTX(
        htp_tx_t *tx, DetectEngineThreadCtx *det_ctx, uint8_t flags, uint32_t *buffer_len)
{
    *buffer_len = 0;

    HttpHeaderThreadData *hdr_td = NULL;
    HttpHeaderBuffer *buf = HttpHeaderGetBufferSpace(det_ctx, flags, g_keyword_thread_id, &hdr_td);
    if (unlikely(buf == NULL)) {
        return NULL;
    }

    const htp_headers_t *headers;
    if (flags & STREAM_TOSERVER) {
        if (AppLayerParserGetStateProgress(IPPROTO_TCP, ALPROTO_HTTP1, tx, flags) <=
                HTP_REQUEST_PROGRESS_HEADERS)
            return NULL;
        headers = htp_tx_request_headers(tx);
    } else {
        if (AppLayerParserGetStateProgress(IPPROTO_TCP, ALPROTO_HTTP1, tx, flags) <=
                HTP_RESPONSE_PROGRESS_HEADERS)
            return NULL;
        headers = htp_tx_response_headers(tx);
    }
    if (headers == NULL)
        return NULL;

    /* fill the buffer. \r\nName1\r\nName2\r\n\r\n */
    size_t i = 0;
    size_t no_of_headers = htp_headers_size(headers);
    for (; i < no_of_headers; i++) {
        const htp_header_t *h = htp_headers_get_index(headers, i);
        size_t size = htp_header_name_len(h) + 2; // for \r\n
        if (i == 0)
            size += 2;
        if (i + 1 == no_of_headers)
            size += 2;

        SCLogDebug("size %"PRIuMAX" + buf->len %u vs buf->size %u",
                (uintmax_t)size, buf->len, buf->size);
        if (size + buf->len > buf->size) {
            if (HttpHeaderExpandBuffer(hdr_td, buf, size) != 0) {
                return NULL;
            }
        }

        /* start with a \r\n */
        if (i == 0) {
            buf->buffer[buf->len++] = '\r';
            buf->buffer[buf->len++] = '\n';
        }

        memcpy(buf->buffer + buf->len, htp_header_name_ptr(h), htp_header_name_len(h));
        buf->len += htp_header_name_len(h);
        buf->buffer[buf->len++] = '\r';
        buf->buffer[buf->len++] = '\n';

        /* end with an extra \r\n */
        if (i + 1 == no_of_headers) {
            buf->buffer[buf->len++] = '\r';
            buf->buffer[buf->len++] = '\n';
        }
    }

    *buffer_len = buf->len;
    return buf->buffer;
}

static InspectionBuffer *GetBuffer1ForTX(DetectEngineThreadCtx *det_ctx,
        const DetectEngineTransforms *transforms, Flow *f, const uint8_t flow_flags, void *txv,
        const int list_id)
{
    InspectionBuffer *buffer = InspectionBufferGet(det_ctx, list_id);
    if (buffer->inspect == NULL) {
        uint32_t rawdata_len = 0;
        uint8_t *rawdata = GetBufferForTX(txv, det_ctx, flow_flags, &rawdata_len);
        if (rawdata_len == 0)
            return NULL;

        InspectionBufferSetupAndApplyTransforms(
                det_ctx, list_id, buffer, rawdata, rawdata_len, transforms);
    }

    return buffer;
}

static InspectionBuffer *GetBuffer2ForTX(DetectEngineThreadCtx *det_ctx,
        const DetectEngineTransforms *transforms, Flow *_f, const uint8_t flow_flags, void *txv,
        const int list_id)
{
    InspectionBuffer *buffer = InspectionBufferGet(det_ctx, list_id);
    if (buffer->inspect == NULL) {
        uint32_t b_len = 0;
        const uint8_t *b = NULL;

        void *thread_buf = DetectThreadCtxGetGlobalKeywordThreadCtx(det_ctx, g_http2_thread_id);
        if (thread_buf == NULL)
            return NULL;

        if (SCHttp2TxGetHeaderNames(txv, flow_flags, &b, &b_len, thread_buf) != 1)
            return NULL;
        if (b == NULL || b_len == 0)
            return NULL;

        InspectionBufferSetupAndApplyTransforms(det_ctx, list_id, buffer, b, b_len, transforms);
    }

    return buffer;
}

/**
 * \brief The setup function for the http.header_names keyword for a signature.
 *
 * \param de_ctx Pointer to the detection engine context.
 * \param s      Pointer to signature for the current Signature being parsed
 *               from the rules.
 * \param m      Pointer to the head of the SigMatchs for the current rule
 *               being parsed.
 * \param arg    Pointer to the string holding the keyword value.
 *
 * \retval  0 On success.
 * \retval -1 On failure.
 */
static int DetectHttpHeaderNamesSetup(DetectEngineCtx *de_ctx, Signature *s, const char *arg)
{
    if (SCDetectBufferSetActiveList(de_ctx, s, g_buffer_id) < 0)
        return -1;

    if (SCDetectSignatureSetAppProto(s, ALPROTO_HTTP) < 0)
        return -1;

    return 0;
}

/**
 * \brief Registers the keyword handlers for the "http.header_names" keyword.
 */
void DetectHttpHeaderNamesRegister(void)
{
    sigmatch_table[DETECT_HTTP_HEADER_NAMES].name = KEYWORD_NAME;
    sigmatch_table[DETECT_HTTP_HEADER_NAMES].alias = KEYWORD_NAME_LEGACY;
    sigmatch_table[DETECT_HTTP_HEADER_NAMES].desc = BUFFER_NAME " sticky buffer";
    sigmatch_table[DETECT_HTTP_HEADER_NAMES].url = "/rules/" KEYWORD_DOC;
    sigmatch_table[DETECT_HTTP_HEADER_NAMES].Setup = DetectHttpHeaderNamesSetup;

    sigmatch_table[DETECT_HTTP_HEADER_NAMES].flags |= SIGMATCH_NOOPT | SIGMATCH_INFO_STICKY_BUFFER;

    /* http1 */
    DetectAppLayerMpmRegister(BUFFER_NAME, SIG_FLAG_TOSERVER, 2, PrefilterGenericMpmRegister,
            GetBuffer1ForTX, ALPROTO_HTTP1, HTP_REQUEST_PROGRESS_HEADERS);
    DetectAppLayerMpmRegister(BUFFER_NAME, SIG_FLAG_TOCLIENT, 2, PrefilterGenericMpmRegister,
            GetBuffer1ForTX, ALPROTO_HTTP1, HTP_RESPONSE_PROGRESS_HEADERS);

    DetectAppLayerInspectEngineRegister(BUFFER_NAME, ALPROTO_HTTP1, SIG_FLAG_TOSERVER,
            HTP_REQUEST_PROGRESS_HEADERS, DetectEngineInspectBufferGeneric, GetBuffer1ForTX);
    DetectAppLayerInspectEngineRegister(BUFFER_NAME, ALPROTO_HTTP1, SIG_FLAG_TOCLIENT,
            HTP_RESPONSE_PROGRESS_HEADERS, DetectEngineInspectBufferGeneric, GetBuffer1ForTX);

    /* http2 */
    DetectAppLayerMpmRegister(BUFFER_NAME, SIG_FLAG_TOSERVER, 2, PrefilterGenericMpmRegister,
            GetBuffer2ForTX, ALPROTO_HTTP2, HTTP2StateDataClient);
    DetectAppLayerMpmRegister(BUFFER_NAME, SIG_FLAG_TOCLIENT, 2, PrefilterGenericMpmRegister,
            GetBuffer2ForTX, ALPROTO_HTTP2, HTTP2StateDataServer);

    DetectAppLayerInspectEngineRegister(BUFFER_NAME, ALPROTO_HTTP2, SIG_FLAG_TOSERVER,
            HTTP2StateDataClient, DetectEngineInspectBufferGeneric, GetBuffer2ForTX);
    DetectAppLayerInspectEngineRegister(BUFFER_NAME, ALPROTO_HTTP2, SIG_FLAG_TOCLIENT,
            HTTP2StateDataServer, DetectEngineInspectBufferGeneric, GetBuffer2ForTX);

    DetectBufferTypeSetDescriptionByName(BUFFER_NAME,
            BUFFER_DESC);

    g_buffer_id = DetectBufferTypeGetByName(BUFFER_NAME);

    g_keyword_thread_id = DetectRegisterThreadCtxGlobalFuncs(KEYWORD_NAME,
            HttpHeaderThreadDataInit, &g_td_config, HttpHeaderThreadDataFree);

    g_http2_thread_id = DetectRegisterThreadCtxGlobalFuncs(
            "http2.header_names", SCHttp2ThreadBufDataInit, NULL, SCHttp2ThreadBufDataFree);

    SCLogDebug("keyword %s registered. Thread id %d. "
            "Buffer %s registered. Buffer id %d",
            KEYWORD_NAME, g_keyword_thread_id,
            BUFFER_NAME, g_buffer_id);
}

1	/* Copyright (C) 2007-2017 Open Information Security Foundation
2	*
3	* You can copy, redistribute or modify this Program under the terms of
4	* the GNU General Public License version 2 as published by the Free
5	* Software Foundation.
6	*
7	* This program is distributed in the hope that it will be useful,
8	* but WITHOUT ANY WARRANTY; without even the implied warranty of
9	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10	* GNU General Public License for more details.
11	*
12	* You should have received a copy of the GNU General Public License
13	* version 2 along with this program; if not, write to the Free Software
14	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
15	* 02110-1301, USA.
16	*/
17
18	/**
19	* \ingroup httplayer
20	*
21	* @{
22	*/
23
24
25	/**
26	* \file
27	*
28	* \author Victor Julien <victor@inliniac.net>
29	*
30	* Implements support http_header_names
31	*/
32
33	#include "suricata-common.h"
34	#include "threads.h"
35	#include "decode.h"
36
37	#include "detect.h"
38	#include "detect-parse.h"
39	#include "detect-engine.h"
40	#include "detect-engine-buffer.h"
41	#include "detect-engine-mpm.h"
42	#include "detect-engine-state.h"
43	#include "detect-engine-prefilter.h"
44	#include "detect-engine-content-inspection.h"
45	#include "detect-content.h"
46	#include "detect-pcre.h"
47	#include "detect-http-header-common.h"
48	#include "detect-http-header-names.h"
49
50	#include "flow.h"
51	#include "flow-var.h"
52	#include "flow-util.h"
53
54	#include "util-debug.h"
55	#include "util-unittest.h"
56	#include "util-unittest-helper.h"
57	#include "util-spm.h"
58	#include "util-print.h"
59
60	#include "app-layer.h"
61	#include "app-layer-parser.h"
62
63	#include "app-layer-htp.h"
64	#include "detect-http-header.h"
65	#include "stream-tcp.h"
66
67	#define KEYWORD_NAME "http.header_names"	6✔
68	#define KEYWORD_NAME_LEGACY "http_header_names"	3✔
69	#define KEYWORD_DOC "http-keywords.html#http-header-names"	3✔
70	#define BUFFER_NAME "http_header_names"	33✔
71	#define BUFFER_DESC "http header names"	3✔
72	static int g_buffer_id = 0;
73	static int g_keyword_thread_id = 0;
74	static int g_http2_thread_id = 0;
75
76	#define BUFFER_SIZE_STEP 256
77	static HttpHeaderThreadDataConfig g_td_config = { BUFFER_SIZE_STEP };
78
79	static uint8_t *GetBufferForTX(
80	htp_tx_t tx, DetectEngineThreadCtx det_ctx, uint8_t flags, uint32_t *buffer_len)
81	{	115✔
82	*buffer_len = 0;	115✔
83
84	HttpHeaderThreadData *hdr_td = NULL;	115✔
85	HttpHeaderBuffer *buf = HttpHeaderGetBufferSpace(det_ctx, flags, g_keyword_thread_id, &hdr_td);	115✔
86	if (unlikely(buf == NULL)) {	115✔
87	return NULL;	×
88	}	×
89
90	const htp_headers_t *headers;	115✔
91	if (flags & STREAM_TOSERVER) {	115✔
92	if (AppLayerParserGetStateProgress(IPPROTO_TCP, ALPROTO_HTTP1, tx, flags) <=	85✔
93	HTP_REQUEST_PROGRESS_HEADERS)	85✔
94	return NULL;	17✔
95	headers = htp_tx_request_headers(tx);	68✔
96	} else {	68✔
97	if (AppLayerParserGetStateProgress(IPPROTO_TCP, ALPROTO_HTTP1, tx, flags) <=	30✔
98	HTP_RESPONSE_PROGRESS_HEADERS)	30✔
99	return NULL;	14✔
100	headers = htp_tx_response_headers(tx);	16✔
101	}	16✔
102	if (headers == NULL)	84✔
103	return NULL;	×
104
105	/* fill the buffer. \r\nName1\r\nName2\r\n\r\n */
106	size_t i = 0;	84✔
107	size_t no_of_headers = htp_headers_size(headers);	84✔
108	for (; i < no_of_headers; i++) {	419✔
109	const htp_header_t *h = htp_headers_get_index(headers, i);	335✔
110	size_t size = htp_header_name_len(h) + 2; // for \r\n	335✔
111	if (i == 0)	335✔
112	size += 2;	77✔
113	if (i + 1 == no_of_headers)	335✔
114	size += 2;	77✔
115
116	SCLogDebug("size %"PRIuMAX" + buf->len %u vs buf->size %u",	335✔
117	(uintmax_t)size, buf->len, buf->size);	335✔
118	if (size + buf->len > buf->size) {	335✔
UNCOV 119	if (HttpHeaderExpandBuffer(hdr_td, buf, size) != 0) {	×
120	return NULL;	×
121	}	×
UNCOV 122	}	×
123
124	/* start with a \r\n */
125	if (i == 0) {	335✔
126	buf->buffer[buf->len++] = '\r';	77✔
127	buf->buffer[buf->len++] = '\n';	77✔
128	}	77✔
129
130	memcpy(buf->buffer + buf->len, htp_header_name_ptr(h), htp_header_name_len(h));	335✔
131	buf->len += htp_header_name_len(h);	335✔
132	buf->buffer[buf->len++] = '\r';	335✔
133	buf->buffer[buf->len++] = '\n';	335✔
134
135	/* end with an extra \r\n */
136	if (i + 1 == no_of_headers) {	335✔
137	buf->buffer[buf->len++] = '\r';	77✔
138	buf->buffer[buf->len++] = '\n';	77✔
139	}	77✔
140	}	335✔
141
142	*buffer_len = buf->len;	84✔
143	return buf->buffer;	84✔
144	}	84✔
145
146	static InspectionBuffer GetBuffer1ForTX(DetectEngineThreadCtx det_ctx,
147	const DetectEngineTransforms transforms, Flow f, const uint8_t flow_flags, void *txv,
148	const int list_id)
149	{	115✔
150	InspectionBuffer *buffer = InspectionBufferGet(det_ctx, list_id);	115✔
151	if (buffer->inspect == NULL) {	115✔
152	uint32_t rawdata_len = 0;	115✔
153	uint8_t *rawdata = GetBufferForTX(txv, det_ctx, flow_flags, &rawdata_len);	115✔
154	if (rawdata_len == 0)	115✔
155	return NULL;	38✔
156
157	InspectionBufferSetupAndApplyTransforms(	77✔
158	det_ctx, list_id, buffer, rawdata, rawdata_len, transforms);	77✔
159	}	77✔
160
161	return buffer;	77✔
162	}	115✔
163
164	static InspectionBuffer GetBuffer2ForTX(DetectEngineThreadCtx det_ctx,
165	const DetectEngineTransforms transforms, Flow _f, const uint8_t flow_flags, void *txv,
166	const int list_id)
167	{	635✔
168	InspectionBuffer *buffer = InspectionBufferGet(det_ctx, list_id);	635✔
169	if (buffer->inspect == NULL) {	635✔
170	uint32_t b_len = 0;	549✔
171	const uint8_t *b = NULL;	549✔
172
173	void *thread_buf = DetectThreadCtxGetGlobalKeywordThreadCtx(det_ctx, g_http2_thread_id);	549✔
174	if (thread_buf == NULL)	549✔
175	return NULL;	×
176
177	if (SCHttp2TxGetHeaderNames(txv, flow_flags, &b, &b_len, thread_buf) != 1)	549✔
178	return NULL;	295✔
179	if (b == NULL \|\| b_len == 0)	254✔
180	return NULL;	×
181
182	InspectionBufferSetupAndApplyTransforms(det_ctx, list_id, buffer, b, b_len, transforms);	254✔
183	}	254✔
184
185	return buffer;	340✔
186	}	635✔
187
188	/**
189	* \brief The setup function for the http.header_names keyword for a signature.
190	*
191	* \param de_ctx Pointer to the detection engine context.
192	* \param s Pointer to signature for the current Signature being parsed
193	* from the rules.
194	* \param m Pointer to the head of the SigMatchs for the current rule
195	* being parsed.
196	* \param arg Pointer to the string holding the keyword value.
197	*
198	* \retval 0 On success.
199	* \retval -1 On failure.
200	*/
201	static int DetectHttpHeaderNamesSetup(DetectEngineCtx de_ctx, Signature s, const char *arg)
202	{	3,804✔
203	if (SCDetectBufferSetActiveList(de_ctx, s, g_buffer_id) < 0)	3,804✔
204	return -1;	2✔
205
206	if (SCDetectSignatureSetAppProto(s, ALPROTO_HTTP) < 0)	3,802✔
207	return -1;	1✔
208
209	return 0;	3,801✔
210	}	3,802✔
211
212	/**
213	* \brief Registers the keyword handlers for the "http.header_names" keyword.
214	*/
215	void DetectHttpHeaderNamesRegister(void)
216	{	3✔
217	sigmatch_table[DETECT_HTTP_HEADER_NAMES].name = KEYWORD_NAME;	3✔
218	sigmatch_table[DETECT_HTTP_HEADER_NAMES].alias = KEYWORD_NAME_LEGACY;	3✔
219	sigmatch_table[DETECT_HTTP_HEADER_NAMES].desc = BUFFER_NAME " sticky buffer";	3✔
220	sigmatch_table[DETECT_HTTP_HEADER_NAMES].url = "/rules/" KEYWORD_DOC;	3✔
221	sigmatch_table[DETECT_HTTP_HEADER_NAMES].Setup = DetectHttpHeaderNamesSetup;	3✔
222
223	sigmatch_table[DETECT_HTTP_HEADER_NAMES].flags \|= SIGMATCH_NOOPT \| SIGMATCH_INFO_STICKY_BUFFER;	3✔
224
225	/* http1 */
226	DetectAppLayerMpmRegister(BUFFER_NAME, SIG_FLAG_TOSERVER, 2, PrefilterGenericMpmRegister,	3✔
227	GetBuffer1ForTX, ALPROTO_HTTP1, HTP_REQUEST_PROGRESS_HEADERS);	3✔
228	DetectAppLayerMpmRegister(BUFFER_NAME, SIG_FLAG_TOCLIENT, 2, PrefilterGenericMpmRegister,	3✔
229	GetBuffer1ForTX, ALPROTO_HTTP1, HTP_RESPONSE_PROGRESS_HEADERS);	3✔
230
231	DetectAppLayerInspectEngineRegister(BUFFER_NAME, ALPROTO_HTTP1, SIG_FLAG_TOSERVER,	3✔
232	HTP_REQUEST_PROGRESS_HEADERS, DetectEngineInspectBufferGeneric, GetBuffer1ForTX);	3✔
233	DetectAppLayerInspectEngineRegister(BUFFER_NAME, ALPROTO_HTTP1, SIG_FLAG_TOCLIENT,	3✔
234	HTP_RESPONSE_PROGRESS_HEADERS, DetectEngineInspectBufferGeneric, GetBuffer1ForTX);	3✔
235
236	/* http2 */
237	DetectAppLayerMpmRegister(BUFFER_NAME, SIG_FLAG_TOSERVER, 2, PrefilterGenericMpmRegister,	3✔
238	GetBuffer2ForTX, ALPROTO_HTTP2, HTTP2StateDataClient);	3✔
239	DetectAppLayerMpmRegister(BUFFER_NAME, SIG_FLAG_TOCLIENT, 2, PrefilterGenericMpmRegister,	3✔
240	GetBuffer2ForTX, ALPROTO_HTTP2, HTTP2StateDataServer);	3✔
241
242	DetectAppLayerInspectEngineRegister(BUFFER_NAME, ALPROTO_HTTP2, SIG_FLAG_TOSERVER,	3✔
243	HTTP2StateDataClient, DetectEngineInspectBufferGeneric, GetBuffer2ForTX);	3✔
244	DetectAppLayerInspectEngineRegister(BUFFER_NAME, ALPROTO_HTTP2, SIG_FLAG_TOCLIENT,	3✔
245	HTTP2StateDataServer, DetectEngineInspectBufferGeneric, GetBuffer2ForTX);	3✔
246
247	DetectBufferTypeSetDescriptionByName(BUFFER_NAME,	3✔
248	BUFFER_DESC);	3✔
249
250	g_buffer_id = DetectBufferTypeGetByName(BUFFER_NAME);	3✔
251
252	g_keyword_thread_id = DetectRegisterThreadCtxGlobalFuncs(KEYWORD_NAME,	3✔
253	HttpHeaderThreadDataInit, &g_td_config, HttpHeaderThreadDataFree);	3✔
254
255	g_http2_thread_id = DetectRegisterThreadCtxGlobalFuncs(	3✔
256	"http2.header_names", SCHttp2ThreadBufDataInit, NULL, SCHttp2ThreadBufDataFree);	3✔
257
258	SCLogDebug("keyword %s registered. Thread id %d. "	3✔
259	"Buffer %s registered. Buffer id %d",	3✔
260	KEYWORD_NAME, g_keyword_thread_id,	3✔
261	BUFFER_NAME, g_buffer_id);	3✔
262	}	3✔

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