1 files changed, 124 insertions, 0 deletions
diff --git a/src/detect-filemd5.c b/src/detect-filemd5.c
new file mode 100644
index 0000000..9ea0880
--- /dev/null
+++ b/src/detect-filemd5.c
@@ -0,0 +1,124 @@
+/* Copyright (C) 2007-2012 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-engine.h"
+#include "detect-file-hash-common.h"
+#include "util-unittest.h"
+#include "util-unittest-helper.h"
+
+#include "detect-filemd5.h"
+
+static int g_file_match_list_id = 0;
+
+static int DetectFileMd5Setup (DetectEngineCtx *, Signature *, const char *);
+#ifdef UNITTESTS
+static void DetectFileMd5RegisterTests(void);
+#endif
+
+/**
+ * \brief Registration function for keyword: filemd5
+ */
+void DetectFileMd5Register(void)
+{
+    sigmatch_table[DETECT_FILEMD5].name = "filemd5";
+    sigmatch_table[DETECT_FILEMD5].desc = "match file MD5 against list of MD5 checksums";
+    sigmatch_table[DETECT_FILEMD5].url = "/rules/file-keywords.html#filemd5";
+    sigmatch_table[DETECT_FILEMD5].FileMatch = DetectFileHashMatch;
+    sigmatch_table[DETECT_FILEMD5].Setup = DetectFileMd5Setup;
+    sigmatch_table[DETECT_FILEMD5].Free  = DetectFileHashFree;
+#ifdef UNITTESTS
+    sigmatch_table[DETECT_FILEMD5].RegisterTests = DetectFileMd5RegisterTests;
+#endif
+    g_file_match_list_id = DetectBufferTypeRegister("files");
+
+    SCLogDebug("registering filemd5 rule option");
+    return;
+}
+
+/**
+ * \brief this function is used to parse filemd5 options
+ * \brief into the current signature
+ *
+ * \param de_ctx pointer to the Detection Engine Context
+ * \param s pointer to the Current Signature
+ * \param str pointer to the user provided "filemd5" option
+ *
+ * \retval 0 on Success
+ * \retval -1 on Failure
+ */
+static int DetectFileMd5Setup (DetectEngineCtx *de_ctx, Signature *s, const char *str)
+{
+    return DetectFileHashSetup(de_ctx, s, str, DETECT_FILEMD5, g_file_match_list_id);
+}
+
+#ifdef UNITTESTS
+static int MD5MatchLookupString(ROHashTable *hash, const char *string)
+{
+    uint8_t md5[16];
+    if (ReadHashString(md5, string, "file", 88, 32) == 1) {
+        void *ptr = ROHashLookup(hash, &md5, (uint16_t)sizeof(md5));
+        if (ptr == NULL)
+            return 0;
+        else
+            return 1;
+    }
+    return 0;
+}
+
+static int MD5MatchTest01(void)
+{
+    ROHashTable *hash = ROHashInit(4, 16);
+    FAIL_IF_NULL(hash);
+    FAIL_IF(LoadHashTable(hash, "d80f93a93dc5f3ee945704754d6e0a36", "file", 1, DETECT_FILEMD5) !=
+            1);
+    FAIL_IF(LoadHashTable(hash, "92a49985b384f0d993a36e4c2d45e206", "file", 2, DETECT_FILEMD5) !=
+            1);
+    FAIL_IF(LoadHashTable(hash, "11adeaacc8c309815f7bc3e33888f281", "file", 3, DETECT_FILEMD5) !=
+            1);
+    FAIL_IF(LoadHashTable(hash, "22e10a8fe02344ade0bea8836a1714af", "file", 4, DETECT_FILEMD5) !=
+            1);
+    FAIL_IF(LoadHashTable(hash, "c3db2cbf02c68f073afcaee5634677bc", "file", 5, DETECT_FILEMD5) !=
+            1);
+    FAIL_IF(LoadHashTable(hash, "7ed095da259638f42402fb9e74287a17", "file", 6, DETECT_FILEMD5) !=
+            1);
+    FAIL_IF(ROHashInitFinalize(hash) != 1);
+    FAIL_IF(MD5MatchLookupString(hash, "d80f93a93dc5f3ee945704754d6e0a36") != 1);
+    FAIL_IF(MD5MatchLookupString(hash, "92a49985b384f0d993a36e4c2d45e206") != 1);
+    FAIL_IF(MD5MatchLookupString(hash, "11adeaacc8c309815f7bc3e33888f281") != 1);
+    FAIL_IF(MD5MatchLookupString(hash, "22e10a8fe02344ade0bea8836a1714af") != 1);
+    FAIL_IF(MD5MatchLookupString(hash, "c3db2cbf02c68f073afcaee5634677bc") != 1);
+    FAIL_IF(MD5MatchLookupString(hash, "7ed095da259638f42402fb9e74287a17") != 1);
+    /* shouldn't match */
+    FAIL_IF(MD5MatchLookupString(hash, "33333333333333333333333333333333") == 1);
+    ROHashFree(hash);
+    PASS;
+}
+
+void DetectFileMd5RegisterTests(void)
+{
+    UtRegisterTest("MD5MatchTest01", MD5MatchTest01);
+}
+#endif