[!] Error: Unsupported KDZ file format.

[ishiestar]

when I run the following

$ ./unkdz -f V20D_00_0128.kdz -l

I get the following error

[!] Error: Unsupported KDZ file format.
[ ] Received header "f3 79 97 e5 2a 20 ff 71".

Are LG optimus KDZs not supported? This KDZ is of an LG Optimus L7 II (P713).

[ehem]

Most likely LGE changed their format again (this happens, they want to deliberately break everyone else's software). The fix isn't too complex, near the top of unkdz.py the following:

        kdz_header = {
                b"\x28\x05\x00\x00"b"\x34\x31\x25\x80": 0,
                b"\x18\x05\x00\x00"b"\x32\x79\x44\x50": 1,
                kdz.KDZFile._dz_header:                 2,
        }

Would be changed to:

        kdz_header = {
                b"\x28\x05\x00\x00"b"\x34\x31\x25\x80": 0,
                b"\x18\x05\x00\x00"b"\x32\x79\x44\x50": 1,
                b"\xf3\x79\x97\xe5"b"\x2a\x20\xff\x71": 2,
                kdz.KDZFile._dz_header:                 3,
        }

Please confirm you end up with something sensible when trying this, also note those are tabs not spaces!

[phodina]

Hi @ehem ,
I've got LG K40 and downloaded the zip with stock Android ROM.

However, there's an issue extracting the file. I've modified the byte definitions for the header.

--- a/unkdz.py
+++ b/unkdz.py
@@ -41,9 +41,10 @@ class KDZFileTools(kdz.KDZFile):
        infile = None

        kdz_header = {
-               b"\x28\x05\x00\x00"b"\x34\x31\x25\x80": 0,
-               b"\x18\x05\x00\x00"b"\x32\x79\x44\x50": 1,
-               kdz.KDZFile._dz_header:                 2,
+               b"\x28\x05\x00\x00"b"\x24\x38\x22\x25": 0,
+               b"\x58\x34\x32\x30"b"\x31\x30\x69\x5f": 1,
+               b"\x30\x32\x2e\x64"b"\x7a\x00\x00\x00": 2,
+               kdz.KDZFile._dz_header:                 3,
        }

But then I get:

./undz.py -x -f LG_K40.kdz
[!] Bad DZ file header!

#26

Is there any documentation on the KDZ file format available?

[phodina]

So I used the unkkdz to extract the DZ file. However, then I got error about the unsupported GPT header.

bin/unkdz -f ~/Downloads/X420HM20a_09_0303.kdz -x
[!] Warning: Data between headers and payload! (offsets 826 to 83768)
[+] Extracting all partitions from v2 file!

[+] Extracting X42021v_00_TCL_MX_OP_0303.dz to kdzextracted/X42021v_00_TCL_MX_OP_0303.dz
[+] Extracting LGUP_c.dll to kdzextracted/LGUP_c.dll
[+] Extracting LGUP_c.dylib to kdzextracted/LGUP_c.dylib
[+] Extracting extra data to kdzextracted/kdz_extras.bin
undz -f ~/Downloads/kdzextracted/X42021v_00_TCL_MX_OP_0303.dz -l
[ ] Warning: Found 1 out of order chunks (please report)
Traceback (most recent call last):
  File "/gnu/store/h0326sq0gsqz8fxhlq4cjnnaql25qgnq-kdztools-1.2/bin/.undz.py-real", line 632, in loadChunks
    g = gpt.GPT(self.chunks[0].extract())
  File "/gnu/store/h0326sq0gsqz8fxhlq4cjnnaql25qgnq-kdztools-1.2/lib/python3.10/site-packages/gpt.py", line 268, in __init__
    raise NoGPT("Error: GPT major version isn't 1")
gpt.NoGPT: Error: GPT major version isn't 1

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/gnu/store/h0326sq0gsqz8fxhlq4cjnnaql25qgnq-kdztools-1.2/bin/.undz.py-real", line 1079, in <module>
    dztools.main()
  File "/gnu/store/h0326sq0gsqz8fxhlq4cjnnaql25qgnq-kdztools-1.2/bin/.undz.py-real", line 1045, in main
    self.dz_file = UNDZFile(cmd.dzfile)
  File "/gnu/store/h0326sq0gsqz8fxhlq4cjnnaql25qgnq-kdztools-1.2/bin/.undz.py-real", line 911, in __init__
    self.loadChunks()
  File "/gnu/store/h0326sq0gsqz8fxhlq4cjnnaql25qgnq-kdztools-1.2/bin/.undz.py-real", line 673, in loadChunks
    print("[!] Unable to find GPT in DZ file: {:s}".format(err))
TypeError: unsupported format string passed to NoGPT.__format__