First version of kindlepid and kindlefix scripts

Kindle_Mobi_Tools/lib/kindlepid.py

@@ -0,0 +1,45 @@
+import sys, binascii
+
+letters = "ABCDEFGHIJKLMNPQRSTUVWXYZ123456789"
+
+def crc32(s):
+  return (~binascii.crc32(s,-1))&0xFFFFFFFF 
+
+def checksumPid(s):
+  crc = crc32(s)
+  crc = crc ^ (crc >> 16)
+  res = s
+  l = len(letters)
+  for i in (0,1):
+    b = crc & 0xff
+    pos = (b // l) ^ (b % l)
+    res += letters[pos%l]
+    crc >>= 8
+
+  return res
+
+
+def pidFromSerial(s, l):
+  crc = crc32(s)
+  
+  arr1 = [0]*l
+  for i in xrange(len(s)):
+    arr1[i%l] ^= ord(s[i])
+
+  crc_bytes = [crc >> 24 & 0xff, crc >> 16 & 0xff, crc >> 8 & 0xff, crc & 0xff]
+  for i in xrange(l):
+    arr1[i] ^= crc_bytes[i&3]
+
+  pid = ""
+  for i in xrange(l):
+    b = arr1[i] & 0xff
+    pid+=letters[(b >> 7) + ((b >> 5 & 3) ^ (b & 0x1f))]
+
+  return pid
+
+print "Mobipocket PID calculator for Amazon Kindle. Copyright (c) 2007 Igor Skochinsky <skochinsky@mail.ru>"
+if len(sys.argv)>1:
+  pid = pidFromSerial(sys.argv[1],7)+"*"
+  print "Mobipocked PID for Kindle serial# "+sys.argv[1]+" is "+checksumPid(pid)
+else:
+  print "Usage: kindlepid.py <Kindle Serial Number>"