From 5f396c7637558df8ee23c90c8a2ad1b01885e686 Mon Sep 17 00:00:00 2001
From: Aram <aram@factorit.nl>
Date: Tue, 30 May 2017 23:18:04 +0200
Subject: [PATCH] Added bin/txt converters

---
 bintotxt.py | 16 ++++++++++++++++
 txttobin.py | 28 ++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)
 create mode 100644 bintotxt.py
 create mode 100644 txttobin.py

diff --git a/bintotxt.py b/bintotxt.py
new file mode 100644
index 0000000..7631e07
--- /dev/null
+++ b/bintotxt.py
@@ -0,0 +1,16 @@
+import sys
+data = file(sys.argv[1], 'rb').read()
+uid = data[0:4]
+
+def parity(x):
+    return ("{0:08b}".format(x).count('1') & 1)
+
+for idx in range(6, len(data), 9):
+    n = data[idx:idx+8]
+    p = data[idx+8]
+    nonce_string = [ "%02x" % ord(n[i])
+                      + ('  ' if int(x)^parity(ord(n[i])) else '! ')
+                      for i, x in enumerate(("{0:08b}".format(ord(p))))
+                   ]
+    print ''.join(nonce_string[:4])
+    print ''.join(nonce_string[4:])
diff --git a/txttobin.py b/txttobin.py
new file mode 100644
index 0000000..670e9ed
--- /dev/null
+++ b/txttobin.py
@@ -0,0 +1,28 @@
+import sys
+data = file(sys.argv[1], 'rb').readlines()
+uid = sys.argv[1].replace('.txt','')
+
+def parity(x):
+    return ("{0:08b}".format(x).count('1') & 1)
+
+uid=raw_input("uid> ")
+fp = file(uid+'_generated.bin','wb')
+fp.write(uid.decode('hex')+"\x00"*2)
+bits = 0
+pbits = 0
+for l in data:
+    if bits == 8:
+        fp.write(chr(pbits))
+        bits = 0
+        pbits = 0
+    hexbytes = filter(None, l.strip().split(' '))
+    bits += 4
+    for x in hexbytes:
+        b = int(x.replace('!', ''), 16)
+        p = parity(b)
+        if '!' not in x:
+            p^=1
+        pbits <<= 1
+        pbits |= p
+        fp.write(chr(b))
+