1 files changed, 172 insertions, 0 deletions
diff --git a/src/util-lua-ja3.c b/src/util-lua-ja3.c
new file mode 100644
index 0000000..1faed68
--- /dev/null
+++ b/src/util-lua-ja3.c
@@ -0,0 +1,172 @@
+/* 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 Mats Klepsland <mats.klepsland@gmail.com>
+ *
+ */
+
+#include "suricata-common.h"
+#include "detect.h"
+#include "pkt-var.h"
+#include "conf.h"
+
+#include "threads.h"
+#include "threadvars.h"
+#include "tm-threads.h"
+
+#include "util-print.h"
+#include "util-unittest.h"
+
+#include "util-debug.h"
+
+#include "output.h"
+#include "app-layer.h"
+#include "app-layer-parser.h"
+#include "app-layer-ssl.h"
+#include "util-privs.h"
+#include "util-buffer.h"
+#include "util-proto-name.h"
+#include "util-logopenfile.h"
+#include "util-time.h"
+
+#ifdef HAVE_LUA
+
+#include <lua.h>
+#include <lualib.h>
+#include <lauxlib.h>
+
+#include "util-lua.h"
+#include "util-lua-common.h"
+#include "util-lua-ja3.h"
+
+static int Ja3GetHash(lua_State *luastate)
+{
+    if (!(LuaStateNeedProto(luastate, ALPROTO_TLS)))
+        return LuaCallbackError(luastate, "error: protocol is not tls");
+
+    Flow *f = LuaStateGetFlow(luastate);
+    if (f == NULL)
+        return LuaCallbackError(luastate, "internal error: no flow");
+
+    void *state = FlowGetAppState(f);
+    if (state == NULL)
+        return LuaCallbackError(luastate, "error: no app layer state");
+
+    SSLState *ssl_state = (SSLState *)state;
+
+    if (ssl_state->client_connp.ja3_hash == NULL)
+        return LuaCallbackError(luastate, "error: no JA3 hash");
+
+    return LuaPushStringBuffer(luastate,
+                               (uint8_t *)ssl_state->client_connp.ja3_hash,
+                               strlen(ssl_state->client_connp.ja3_hash));
+}
+
+static int Ja3GetString(lua_State *luastate)
+{
+    if (!(LuaStateNeedProto(luastate, ALPROTO_TLS)))
+        return LuaCallbackError(luastate, "error: protocol is not tls");
+
+    Flow *f = LuaStateGetFlow(luastate);
+    if (f == NULL)
+        return LuaCallbackError(luastate, "internal error: no flow");
+
+    void *state = FlowGetAppState(f);
+    if (state == NULL)
+        return LuaCallbackError(luastate, "error: no app layer state");
+
+    SSLState *ssl_state = (SSLState *)state;
+
+    if (ssl_state->client_connp.ja3_str == NULL ||
+            ssl_state->client_connp.ja3_str->data == NULL)
+        return LuaCallbackError(luastate, "error: no JA3 str");
+
+    return LuaPushStringBuffer(luastate,
+                               (uint8_t *)ssl_state->client_connp.ja3_str->data,
+                               ssl_state->client_connp.ja3_str->used);
+}
+
+static int Ja3SGetHash(lua_State *luastate)
+{
+    if (!(LuaStateNeedProto(luastate, ALPROTO_TLS)))
+        return LuaCallbackError(luastate, "error: protocol is not tls");
+
+    Flow *f = LuaStateGetFlow(luastate);
+    if (f == NULL)
+        return LuaCallbackError(luastate, "internal error: no flow");
+
+    void *state = FlowGetAppState(f);
+    if (state == NULL)
+        return LuaCallbackError(luastate, "error: no app layer state");
+
+    SSLState *ssl_state = (SSLState *)state;
+
+    if (ssl_state->server_connp.ja3_hash == NULL)
+        return LuaCallbackError(luastate, "error: no JA3S hash");
+
+    return LuaPushStringBuffer(luastate,
+                               (uint8_t *)ssl_state->server_connp.ja3_hash,
+                               strlen(ssl_state->server_connp.ja3_hash));
+}
+
+static int Ja3SGetString(lua_State *luastate)
+{
+    if (!(LuaStateNeedProto(luastate, ALPROTO_TLS)))
+        return LuaCallbackError(luastate, "error: protocol is not tls");
+
+    Flow *f = LuaStateGetFlow(luastate);
+    if (f == NULL)
+        return LuaCallbackError(luastate, "internal error: no flow");
+
+    void *state = FlowGetAppState(f);
+    if (state == NULL)
+        return LuaCallbackError(luastate, "error: no app layer state");
+
+    SSLState *ssl_state = (SSLState *)state;
+
+    if (ssl_state->server_connp.ja3_str == NULL ||
+            ssl_state->server_connp.ja3_str->data == NULL)
+        return LuaCallbackError(luastate, "error: no JA3S str");
+
+    return LuaPushStringBuffer(luastate,
+                               (uint8_t *)ssl_state->server_connp.ja3_str->data,
+                               ssl_state->server_connp.ja3_str->used);
+}
+
+/** *\brief Register JA3 Lua extensions */
+int LuaRegisterJa3Functions(lua_State *luastate)
+{
+    lua_pushcfunction(luastate, Ja3GetHash);
+    lua_setglobal(luastate, "Ja3GetHash");
+
+    lua_pushcfunction(luastate, Ja3GetString);
+    lua_setglobal(luastate, "Ja3GetString");
+
+    lua_pushcfunction(luastate, Ja3SGetHash);
+    lua_setglobal(luastate, "Ja3SGetHash");
+
+    lua_pushcfunction(luastate, Ja3SGetString);
+    lua_setglobal(luastate, "Ja3SGetString");
+
+    return 0;
+}
+
+#endif /* HAVE_LUA */