Merge pull request #464 from Security-Onion-Solutions/feature/zeek-communityid

Zeek - enable Community ID policy

salt/zeek/files/local.zeek

@@ -125,5 +125,8 @@ redef LogAscii::json_timestamps = JSON::TS_ISO8601;
 # BPF Configuration
 @load securityonion/bpfconf
 
+# Community ID
+@load securityonion/communityid
+
 # Extracted files
-@load securityonion/file-extraction
+@load securityonion/file-extraction

salt/zeek/policy/securityonion/communityid.zeek

@@ -0,0 +1,25 @@
+# Bro package & plugin for adding community hash IDs to conn.log.
+# This is loaded when a user activates the plugin.
+#
+module CommunityID;
+
+export {
+    # An unsigned 16-bit number to seed our hashing
+    const seed: count = 0 &redef;
+
+    # Whether to add a base64 pass over the hash digest.
+    # Enabled by default, since it shortens the output.
+    const do_base64: bool = T &redef;
+
+    # Verbose debugging log output to the console.
+    const verbose: bool = F &redef;
+
+    # Add the ID string field to the connection log record.
+    redef record Conn::Info += {
+        community_id: string &optional &log;
+    };
+}
+
+event connection_state_remove(c: connection) {
+    c$conn$community_id = hash_conn(c);
+}