Adding upstream version 1:7.0.3.upstream/1%7.0.3

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 216 insertions, 0 deletions

diff --git a/src/detect-http-headers-stub.h b/src/detect-http-headers-stub.h
new file mode 100644
index 0000000..3a036d6
--- /dev/null
+++ b/src/detect-http-headers-stub.h
@@ -0,0 +1,216 @@
+/* Copyright (C) 2007-2019 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.
+ */
+
+/**
+ * Stub for per HTTP header detection keyword. Meant to be included into
+ * a C file.
+ */
+
+/**
+ * \ingroup httplayer
+ *
+ * @{
+ */
+
+#include "suricata-common.h"
+#include "flow.h"
+
+#include <htp/htp.h>
+
+#include "detect.h"
+#include "detect-parse.h"
+#include "detect-engine.h"
+#include "detect-engine-mpm.h"
+#include "detect-engine-prefilter.h"
+
+#include "util-debug.h"
+#include "rust.h"
+
+static int g_buffer_id = 0;
+
+#ifdef KEYWORD_TOSERVER
+static InspectionBuffer *GetRequestData(DetectEngineThreadCtx *det_ctx,
+        const DetectEngineTransforms *transforms, Flow *_f,
+        const uint8_t _flow_flags, void *txv, const int list_id)
+{
+    SCEnter();
+
+    InspectionBuffer *buffer = InspectionBufferGet(det_ctx, list_id);
+    if (buffer->inspect == NULL) {
+        htp_tx_t *tx = (htp_tx_t *)txv;
+
+        if (tx->request_headers == NULL)
+            return NULL;
+
+        htp_header_t *h = (htp_header_t *)htp_table_get_c(tx->request_headers,
+                                                          HEADER_NAME);
+        if (h == NULL || h->value == NULL) {
+            SCLogDebug("HTTP %s header not present in this request",
+                       HEADER_NAME);
+            return NULL;
+        }
+
+        const uint32_t data_len = bstr_len(h->value);
+        const uint8_t *data = bstr_ptr(h->value);
+
+        InspectionBufferSetup(det_ctx, list_id, buffer, data, data_len);
+        InspectionBufferApplyTransforms(buffer, transforms);
+    }
+
+    return buffer;
+}
+
+static InspectionBuffer *GetRequestData2(DetectEngineThreadCtx *det_ctx,
+        const DetectEngineTransforms *transforms, Flow *_f, const uint8_t _flow_flags, void *txv,
+        const int list_id)
+{
+    SCEnter();
+
+    InspectionBuffer *buffer = InspectionBufferGet(det_ctx, list_id);
+    if (buffer->inspect == NULL) {
+        uint32_t b_len = 0;
+        const uint8_t *b = NULL;
+
+        if (rs_http2_tx_get_header_value(txv, STREAM_TOSERVER, HEADER_NAME, &b, &b_len) != 1)
+            return NULL;
+        if (b == NULL || b_len == 0)
+            return NULL;
+
+        InspectionBufferSetup(det_ctx, list_id, buffer, b, b_len);
+        InspectionBufferApplyTransforms(buffer, transforms);
+    }
+
+    return buffer;
+}
+
+#endif
+#ifdef KEYWORD_TOCLIENT
+static InspectionBuffer *GetResponseData(DetectEngineThreadCtx *det_ctx,
+        const DetectEngineTransforms *transforms, Flow *_f,
+        const uint8_t _flow_flags, void *txv, const int list_id)
+{
+    SCEnter();
+
+    InspectionBuffer *buffer = InspectionBufferGet(det_ctx, list_id);
+    if (buffer->inspect == NULL) {
+        htp_tx_t *tx = (htp_tx_t *)txv;
+
+        if (tx->response_headers == NULL)
+            return NULL;
+
+        htp_header_t *h = (htp_header_t *)htp_table_get_c(tx->response_headers,
+                                                          HEADER_NAME);
+        if (h == NULL || h->value == NULL) {
+            SCLogDebug("HTTP %s header not present in this request",
+                       HEADER_NAME);
+            return NULL;
+        }
+
+        const uint32_t data_len = bstr_len(h->value);
+        const uint8_t *data = bstr_ptr(h->value);
+
+        InspectionBufferSetup(det_ctx, list_id, buffer, data, data_len);
+        InspectionBufferApplyTransforms(buffer, transforms);
+    }
+
+    return buffer;
+}
+
+static InspectionBuffer *GetResponseData2(DetectEngineThreadCtx *det_ctx,
+        const DetectEngineTransforms *transforms, Flow *_f, const uint8_t _flow_flags, void *txv,
+        const int list_id)
+{
+    SCEnter();
+
+    InspectionBuffer *buffer = InspectionBufferGet(det_ctx, list_id);
+    if (buffer->inspect == NULL) {
+        uint32_t b_len = 0;
+        const uint8_t *b = NULL;
+
+        if (rs_http2_tx_get_header_value(txv, STREAM_TOCLIENT, HEADER_NAME, &b, &b_len) != 1)
+            return NULL;
+        if (b == NULL || b_len == 0)
+            return NULL;
+
+        InspectionBufferSetup(det_ctx, list_id, buffer, b, b_len);
+        InspectionBufferApplyTransforms(buffer, transforms);
+    }
+
+    return buffer;
+}
+#endif
+
+/**
+ * \brief this function setup the http.header keyword used in the rule
+ *
+ * \param de_ctx   Pointer to the Detection Engine Context
+ * \param s        Pointer to the Signature to which the current keyword belongs
+ * \param str      Should hold an empty string always
+ *
+ * \retval 0       On success
+ */
+static int DetectHttpHeadersSetupSticky(DetectEngineCtx *de_ctx, Signature *s, const char *str)
+{
+    if (DetectBufferSetActiveList(de_ctx, s, g_buffer_id) < 0)
+        return -1;
+
+    if (DetectSignatureSetAppProto(s, ALPROTO_HTTP) < 0)
+        return -1;
+
+    return 0;
+}
+
+static void DetectHttpHeadersRegisterStub(void)
+{
+    sigmatch_table[KEYWORD_ID].name = KEYWORD_NAME;
+#ifdef KEYWORD_NAME_LEGACY
+    sigmatch_table[KEYWORD_ID].alias = KEYWORD_NAME_LEGACY;
+#endif
+    sigmatch_table[KEYWORD_ID].desc = KEYWORD_NAME " sticky buffer for the " BUFFER_DESC;
+    sigmatch_table[KEYWORD_ID].url = "/rules/" KEYWORD_DOC;
+    sigmatch_table[KEYWORD_ID].Setup = DetectHttpHeadersSetupSticky;
+    sigmatch_table[KEYWORD_ID].flags |= SIGMATCH_NOOPT | SIGMATCH_INFO_STICKY_BUFFER;
+
+#ifdef KEYWORD_TOSERVER
+    DetectAppLayerMpmRegister2(BUFFER_NAME, SIG_FLAG_TOSERVER, 2, PrefilterGenericMpmRegister,
+            GetRequestData, ALPROTO_HTTP1, HTP_REQUEST_HEADERS);
+    DetectAppLayerMpmRegister2(BUFFER_NAME, SIG_FLAG_TOSERVER, 2, PrefilterGenericMpmRegister,
+            GetRequestData2, ALPROTO_HTTP2, HTTP2StateDataClient);
+#endif
+#ifdef KEYWORD_TOCLIENT
+    DetectAppLayerMpmRegister2(BUFFER_NAME, SIG_FLAG_TOCLIENT, 2, PrefilterGenericMpmRegister,
+            GetResponseData, ALPROTO_HTTP1, HTP_RESPONSE_HEADERS);
+    DetectAppLayerMpmRegister2(BUFFER_NAME, SIG_FLAG_TOCLIENT, 2, PrefilterGenericMpmRegister,
+            GetResponseData2, ALPROTO_HTTP2, HTTP2StateDataServer);
+#endif
+#ifdef KEYWORD_TOSERVER
+    DetectAppLayerInspectEngineRegister2(BUFFER_NAME, ALPROTO_HTTP1, SIG_FLAG_TOSERVER,
+            HTP_REQUEST_HEADERS, DetectEngineInspectBufferGeneric, GetRequestData);
+    DetectAppLayerInspectEngineRegister2(BUFFER_NAME, ALPROTO_HTTP2, SIG_FLAG_TOSERVER,
+            HTTP2StateDataClient, DetectEngineInspectBufferGeneric, GetRequestData2);
+#endif
+#ifdef KEYWORD_TOCLIENT
+    DetectAppLayerInspectEngineRegister2(BUFFER_NAME, ALPROTO_HTTP1, SIG_FLAG_TOCLIENT,
+            HTP_RESPONSE_HEADERS, DetectEngineInspectBufferGeneric, GetResponseData);
+    DetectAppLayerInspectEngineRegister2(BUFFER_NAME, ALPROTO_HTTP2, SIG_FLAG_TOCLIENT,
+            HTTP2StateDataServer, DetectEngineInspectBufferGeneric, GetResponseData2);
+#endif
+
+    DetectBufferTypeSetDescriptionByName(BUFFER_NAME, BUFFER_DESC);
+
+    g_buffer_id = DetectBufferTypeGetByName(BUFFER_NAME);
+}