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, 192 insertions, 0 deletions

diff --git a/src/detect-http-stat-msg.c b/src/detect-http-stat-msg.c
new file mode 100644
index 0000000..6be7de6
--- /dev/null
+++ b/src/detect-http-stat-msg.c
@@ -0,0 +1,192 @@
+/* Copyright (C) 2007-2018 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 Gurvinder Singh <gurvindersinghdahiya@gmail.com>
+ * \author Anoop Saldanha <anoopsaldanha@gmail.com>
+ *
+ * Implements the http_stat_msg keyword
+ */
+
+#include "suricata-common.h"
+#include "threads.h"
+#include "decode.h"
+#include "detect.h"
+
+#include "detect-parse.h"
+#include "detect-engine.h"
+#include "detect-content.h"
+#include "detect-pcre.h"
+#include "detect-engine-mpm.h"
+#include "detect-engine-prefilter.h"
+
+#include "flow.h"
+#include "flow-var.h"
+#include "flow-util.h"
+
+#include "util-debug.h"
+#include "util-error.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-stat-msg.h"
+#include "stream-tcp-private.h"
+#include "stream-tcp.h"
+
+static int DetectHttpStatMsgSetup(DetectEngineCtx *, Signature *, const char *);
+#ifdef UNITTESTS
+static void DetectHttpStatMsgRegisterTests(void);
+#endif
+static int g_http_stat_msg_buffer_id = 0;
+static InspectionBuffer *GetData(DetectEngineThreadCtx *det_ctx,
+        const DetectEngineTransforms *transforms, Flow *_f,
+        const uint8_t _flow_flags, void *txv, const int list_id);
+static int DetectHttpStatMsgSetupSticky(DetectEngineCtx *de_ctx, Signature *s, const char *str);
+
+static InspectionBuffer *GetData2(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) {
+        InspectionBufferSetup(det_ctx, list_id, buffer, (const uint8_t *)"", 0);
+        InspectionBufferApplyTransforms(buffer, transforms);
+    }
+
+    return buffer;
+}
+
+/**
+ * \brief Registration function for keyword: http_stat_msg
+ */
+void DetectHttpStatMsgRegister (void)
+{
+    /* http_stat_msg content modifier */
+    sigmatch_table[DETECT_AL_HTTP_STAT_MSG].name = "http_stat_msg";
+    sigmatch_table[DETECT_AL_HTTP_STAT_MSG].desc = "content modifier to match on HTTP stat-msg-buffer";
+    sigmatch_table[DETECT_AL_HTTP_STAT_MSG].url = "/rules/http-keywords.html#http-stat-msg";
+    sigmatch_table[DETECT_AL_HTTP_STAT_MSG].Setup = DetectHttpStatMsgSetup;
+#ifdef UNITTESTS
+    sigmatch_table[DETECT_AL_HTTP_STAT_MSG].RegisterTests = DetectHttpStatMsgRegisterTests;
+#endif
+    sigmatch_table[DETECT_AL_HTTP_STAT_MSG].flags |= SIGMATCH_NOOPT|SIGMATCH_INFO_CONTENT_MODIFIER;
+    sigmatch_table[DETECT_AL_HTTP_STAT_MSG].alternative = DETECT_HTTP_STAT_MSG;
+
+    /* http.stat_msg sticky buffer */
+    sigmatch_table[DETECT_HTTP_STAT_MSG].name = "http.stat_msg";
+    sigmatch_table[DETECT_HTTP_STAT_MSG].desc = "sticky buffer to match on the HTTP response status message";
+    sigmatch_table[DETECT_HTTP_STAT_MSG].url = "/rules/http-keywords.html#http-stat-msg";
+    sigmatch_table[DETECT_HTTP_STAT_MSG].Setup = DetectHttpStatMsgSetupSticky;
+    sigmatch_table[DETECT_HTTP_STAT_MSG].flags |= SIGMATCH_NOOPT|SIGMATCH_INFO_STICKY_BUFFER;
+
+    DetectAppLayerInspectEngineRegister2("http_stat_msg", ALPROTO_HTTP1, SIG_FLAG_TOCLIENT,
+            HTP_RESPONSE_LINE, DetectEngineInspectBufferGeneric, GetData);
+
+    DetectAppLayerMpmRegister2("http_stat_msg", SIG_FLAG_TOCLIENT, 3, PrefilterGenericMpmRegister,
+            GetData, ALPROTO_HTTP1, HTP_RESPONSE_LINE);
+
+    DetectAppLayerInspectEngineRegister2("http_stat_msg", ALPROTO_HTTP2, SIG_FLAG_TOCLIENT,
+            HTTP2StateDataServer, DetectEngineInspectBufferGeneric, GetData2);
+    DetectAppLayerMpmRegister2("http_stat_msg", SIG_FLAG_TOCLIENT, 2, PrefilterGenericMpmRegister,
+            GetData2, ALPROTO_HTTP2, HTTP2StateDataServer);
+
+    DetectBufferTypeSetDescriptionByName("http_stat_msg",
+            "http response status message");
+
+    g_http_stat_msg_buffer_id = DetectBufferTypeGetByName("http_stat_msg");
+}
+
+/**
+ * \brief this function setups the http_stat_msg modifier 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
+ * \retval -1 On failure
+ */
+
+static int DetectHttpStatMsgSetup(DetectEngineCtx *de_ctx, Signature *s, const char *arg)
+{
+    return DetectEngineContentModifierBufferSetup(
+            de_ctx, s, arg, DETECT_AL_HTTP_STAT_MSG, g_http_stat_msg_buffer_id, ALPROTO_HTTP1);
+}
+
+/**
+ * \brief this function setup the http.stat_msg 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 DetectHttpStatMsgSetupSticky(DetectEngineCtx *de_ctx, Signature *s, const char *str)
+{
+    if (DetectBufferSetActiveList(de_ctx, s, g_http_stat_msg_buffer_id) < 0)
+        return -1;
+    if (DetectSignatureSetAppProto(s, ALPROTO_HTTP) < 0)
+        return -1;
+    return 0;
+}
+
+static InspectionBuffer *GetData(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_message == NULL)
+            return NULL;
+
+        const uint32_t data_len = bstr_len(tx->response_message);
+        const uint8_t *data = bstr_ptr(tx->response_message);
+
+        InspectionBufferSetup(det_ctx, list_id, buffer, data, data_len);
+        InspectionBufferApplyTransforms(buffer, transforms);
+    }
+
+    return buffer;
+}
+
+#ifdef UNITTESTS
+#include "tests/detect-http-stat-msg.c"
+#endif /* UNITTESTS */
+
+/**
+ * @}
+ */