Adding support for enc 8, blowfish.

djmitche · Dec 9, 2015 · 9ef6735 · 9ef6735
1 parent fbe7965
commit 9ef6735
Showing 1 changed file with 15 additions and 0 deletions.
diff --git a/pynsca.py b/pynsca.py
@@ -91,6 +91,21 @@ def _encrypt_packet(self, toserver_pkt, iv, mode, password):
             myDes = Crypto.Cipher.DES3.new(password, Crypto.Cipher.DES3.MODE_CFB,iv)
             toserver_pkt = ''.join(myDes.encrypt(toserver_pkt))
             #print "toserver_pkt: "+toserver_pkt
+        elif mode == 8:
+            import Crypto.Cipher.Blowfish
+            import Crypto.Util.randpool
+
+            max_key_size = Crypto.Cipher.Blowfish.key_size[-1]
+            password = (password + ('\0' * max_key_size))[:max_key_size]
+            iv_size = 8
+            if len(iv) >= Crypto.Cipher.Blowfish.block_size:
+                iv = iv[:iv_size]
+            else:
+                iv += self.random_pool.get_bytes(iv_size - iv)
+            e = Crypto.Cipher.Blowfish.new(
+                password, Crypto.Cipher.Blowfish.MODE_CFB, iv)
+            toserver_pkt = ''.join(e.encrypt(toserver_pkt))
+            #print "toserver_pkt: "+toserver_pkt
         elif mode == 0:
             return toserver_pkt
         else: