initial code for dumping imessages in a reasonable format

dump-imessages/iphone-dataprotection/python_scripts/emf_decrypter.py

@@ -0,0 +1,34 @@
+from optparse import OptionParser
+from hfs.emf import EMFVolume
+from util.bdev import FileBlockDevice
+import plistlib
+
+def main():
+    parser = OptionParser(usage="emf_decrypter.py disk_image.bin")
+    parser.add_option("-w", "--nowrite", dest="write", action="store_false", default=True,
+                  help="disable modifications of input file, for testing")
+    (options, args) = parser.parse_args()
+    if len(args) < 1:
+        parser.print_help()
+        return
+    device_infos = None
+    if len(args) >= 2: device_infos = plistlib.readPlist(args[1])
+    
+    p = FileBlockDevice(args[0], 0, options.write)
+    v = EMFVolume(p, device_infos)
+    if not v.keybag.unlocked:
+        print "Keybag locked, protected files won't be decrypted, continue anyway ?"
+        if raw_input() == "n":
+            return
+    if options.write:
+        print "WARNING ! This tool will modify the hfs image and possibly wreck it if something goes wrong !"
+        print "Make sure to backup the image before proceeding"
+        print "You can use the --nowrite option to do a dry run instead"
+    else:
+        print "Test mode : the input file will not be modified"
+    print "Press a key to continue or CTRL-C to abort"
+    raw_input()
+    v.decryptAllFiles()
+
+if __name__ == "__main__": 
+    main()