Additional files added

README.md

@@ -1,2 +1,3 @@
-# redstar-tools
+# Tools for Red Star OS (붉은별)
-Tools for Red Star OS (붉은별)
+
+This repository includes several binaries from and tools for Red Star OS. These can be used for further research work.

bin/README.md

@@ -0,0 +1,7 @@
+## opprc
+
+The service which is responsible for watermarking media files.
+
+## scnprc
+
+A "virus scanner" that deletes malicious files.

libos/README.md

@@ -1,11 +1,13 @@
 # libos
 
-## Compile
+`libos.so.0.0.0` is the original libos file from Red Star OS 3.0 Desktop.
+
+## Compile custom libos
 
 1. gcc -c -Wall -Werror -fpic libos.c
 2. gcc -shared -o libos.so.0.0.0 libos.o
 
-## Install
+## Install custom libos
 
 1. Move new libos.so.0.0.0 to /usr/lib/libos.so.0.0.0
 2. Link /usr/lib/libos.so.0.0.0 to /usr/lib/libos.so.0

patterns/README.md

@@ -0,0 +1,11 @@
+## AnGae.dat
+
+The pattern file from Red Star OS 3.0 Desktop.
+
+## angae-010.template
+
+A file structure template for the 010 Editor.
+
+## parse.py
+
+Basic parsing of AnGae.dat files.

patterns/parse.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+import sys
+import struct
+
+f = open(sys.argv[1])
+
+timestamp, = struct.unpack('<I', f.read(4))
+
+unknown1 = f.read(1000)
+
+package_id, = struct.unpack('<I', f.read(4))
+unknown2, = struct.unpack('<I', f.read(4))
+pattern_date, = struct.unpack('<I', f.read(4))
+file_count, = struct.unpack('<I', f.read(4))
+head_pos, = struct.unpack('<I', f.read(4))
+real_size, = struct.unpack('<I', f.read(4))
+
+pattern_count, = struct.unpack('<Q', f.read(8))
+
+print('timestamp: {}'.format(timestamp))
+print('pattern count: {}'.format(pattern_count))
+
+patterns = []
+
+for i in range(pattern_count):
+    pattern = dict()
+    pattern['reclen'], = struct.unpack('<I', f.read(4))
+
+    if int(pattern['reclen']) is not 200:
+        print(pattern['reclen'])
+        break
+
+    pattern['package_id'], = struct.unpack('<I', f.read(4))
+    pattern['content'], = struct.unpack('<200s', f.read(200))
+    patterns.append(pattern)
+
+pattern_checksum, = struct.unpack('<20s', f.read(20))
+print('pattern checksum: {}'.format(pattern_checksum.encode('hex')))
+
+#print(patterns)

rtscan/README.md

@@ -1,6 +1,6 @@
 # Interact with `rtscan`
 
-`resctl.py` can be used to interact with `rtscan` kernel module via ioctl calls to `/dev/res`.
+`resctl.py` can be used to interact with `rtscan` kernel module via ioctl calls to `/dev/res`. `rtscan.ko` is the original kernel module from Red Star OS 3.0 Desktop.
 
 *Note*: On Red Star 3.0 this needs to be executed with root privileges.