1 files changed, 158 insertions, 0 deletions
diff --git a/src/detect-smb-share.c b/src/detect-smb-share.c
new file mode 100644
index 0000000..8d4d145
--- /dev/null
+++ b/src/detect-smb-share.c
@@ -0,0 +1,158 @@
+/* Copyright (C) 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.
+ */
+
+/**
+ * \file
+ *
+ * \author Victor Julien <victor@inliniac.net>
+ *
+ */
+
+#include "suricata-common.h"
+
+#include "detect.h"
+#include "detect-parse.h"
+
+#include "detect-engine.h"
+#include "detect-engine-mpm.h"
+#include "detect-engine-state.h"
+#include "detect-engine-prefilter.h"
+#include "detect-engine-content-inspection.h"
+
+#include "detect-smb-share.h"
+#include "rust.h"
+
+#define BUFFER_NAME "smb_named_pipe"
+#define KEYWORD_NAME "smb.named_pipe"
+#define KEYWORD_NAME_LEGACY BUFFER_NAME
+#define KEYWORD_ID DETECT_SMB_NAMED_PIPE
+
+static int g_smb_named_pipe_buffer_id = 0;
+
+static int DetectSmbNamedPipeSetup(DetectEngineCtx *de_ctx, Signature *s, const char *arg)
+{
+    if (DetectBufferSetActiveList(de_ctx, s, g_smb_named_pipe_buffer_id) < 0)
+        return -1;
+
+    if (DetectSignatureSetAppProto(s, ALPROTO_SMB) < 0)
+        return -1;
+
+    return 0;
+}
+
+static InspectionBuffer *GetNamedPipeData(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;
+
+        if (rs_smb_tx_get_named_pipe(txv, &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;
+}
+
+void DetectSmbNamedPipeRegister(void)
+{
+    sigmatch_table[KEYWORD_ID].name = KEYWORD_NAME;
+    sigmatch_table[KEYWORD_ID].alias = KEYWORD_NAME_LEGACY;
+    sigmatch_table[KEYWORD_ID].Setup = DetectSmbNamedPipeSetup;
+    sigmatch_table[KEYWORD_ID].flags |= SIGMATCH_NOOPT|SIGMATCH_INFO_STICKY_BUFFER;
+    sigmatch_table[KEYWORD_ID].desc = "sticky buffer to match on SMB named pipe in tree connect";
+
+    DetectAppLayerMpmRegister2(BUFFER_NAME, SIG_FLAG_TOSERVER, 2,
+            PrefilterGenericMpmRegister, GetNamedPipeData,
+            ALPROTO_SMB, 1);
+
+    DetectAppLayerInspectEngineRegister2(BUFFER_NAME,
+            ALPROTO_SMB, SIG_FLAG_TOSERVER, 0,
+            DetectEngineInspectBufferGeneric, GetNamedPipeData);
+
+    g_smb_named_pipe_buffer_id = DetectBufferTypeGetByName(BUFFER_NAME);
+}
+
+#undef BUFFER_NAME
+#undef KEYWORD_NAME
+#undef KEYWORD_NAME_LEGACY
+#undef KEYWORD_ID
+
+#define BUFFER_NAME "smb_share"
+#define KEYWORD_NAME "smb.share"
+#define KEYWORD_NAME_LEGACY BUFFER_NAME
+#define KEYWORD_ID DETECT_SMB_SHARE
+
+static int g_smb_share_buffer_id = 0;
+
+static int DetectSmbShareSetup(DetectEngineCtx *de_ctx, Signature *s, const char *arg)
+{
+    if (DetectBufferSetActiveList(de_ctx, s, g_smb_share_buffer_id) < 0)
+        return -1;
+
+    if (DetectSignatureSetAppProto(s, ALPROTO_SMB) < 0)
+        return -1;
+
+    return 0;
+}
+
+static InspectionBuffer *GetShareData(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;
+
+        if (rs_smb_tx_get_share(txv, &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;
+}
+
+void DetectSmbShareRegister(void)
+{
+    sigmatch_table[KEYWORD_ID].name = KEYWORD_NAME;
+    sigmatch_table[KEYWORD_ID].alias = KEYWORD_NAME_LEGACY;
+    sigmatch_table[KEYWORD_ID].Setup = DetectSmbShareSetup;
+    sigmatch_table[KEYWORD_ID].flags |= SIGMATCH_NOOPT|SIGMATCH_INFO_STICKY_BUFFER;
+    sigmatch_table[KEYWORD_ID].desc = "sticky buffer to match on SMB share name in tree connect";
+
+    DetectAppLayerMpmRegister2(BUFFER_NAME, SIG_FLAG_TOSERVER, 2,
+            PrefilterGenericMpmRegister, GetShareData,
+            ALPROTO_SMB, 1);
+
+    DetectAppLayerInspectEngineRegister2(BUFFER_NAME,
+            ALPROTO_SMB, SIG_FLAG_TOSERVER, 0,
+            DetectEngineInspectBufferGeneric, GetShareData);
+
+    g_smb_share_buffer_id = DetectBufferTypeGetByName(BUFFER_NAME);
+}