Decryption of old Tombo Files

Siarzhuk Zharski — Thu, 28 Nov 2024 12:39:43 -0000

By the way, I gave you admin rights in the project.

Decryption of old Tombo Files

Siarzhuk Zharski — Thu, 28 Nov 2024 12:37:21 -0000

Thank you for the tip!
I'm not a daily Tombo user, but my friend may have it usefull. ;-)

Decryption of old Tombo Files

Chris Clark — Thu, 28 Nov 2024 02:38:24 -0000

Fixed in Tombo-U 3.0beta6 thanks to @zharik!

Decryption of old Tombo Files

Chris Clark — Thu, 28 Nov 2024 02:37:46 -0000

Created new topic https://sourceforge.net/p/tombo-u/discussion/general/thread/f719c593e8/

bug/mislabel for encoding

Chris Clark — Thu, 28 Nov 2024 02:37:25 -0000

Cross reference to comment https://sourceforge.net/p/tombo-u/discussion/general/thread/7ef0b7d5ac/#b3c7/537e/7cd4

64-bit support

Chris Clark — Thu, 28 Nov 2024 02:30:30 -0000

This is not urgent for me, but I kept forgetting to do this. I went ahead and opened https://github.com/clach04/tombo/issues/7 just now.

bug/mislabel for encoding

Chris Clark — Thu, 28 Nov 2024 02:24:57 -0000

the encoding options for Tombo 3.0b6 are:

Unicode(UTF16LE)
UTF-8
ANSI (system non-Unicode)

The top one is incorrect, the bottom one is not wrong but it is potentially misleading

Either need to support UTF16 (LE) or update label to "Unicode(UCS2-LE)".

The last one should reflect "local code page".

Decryption of old Tombo Files

Chris Clark — Thu, 28 Nov 2024 02:22:09 -0000

That's a good news / bad news situation. Nice work on figuring this out and fixing.

If you need a tool that can fix a bunch in batch, take a look at ptrecrypt in puren tonbo. It's a relatively new tool but it may help here. Below is a single file test but it works recursively. bad_test was created with v3.0b5 in the current directory:

C:\tmp\TomboU-3.0.0-beta5>C:\code\puren_tonbo\py3.12.5venv\Scripts\ptrecrypt.exe --destination-directory c:\tmp\fixed --new-password password .
'Puren Tonbo ptcipher Password:'

C:\tmp\TomboU-3.0.0-beta5>dir c:\tmp\fixed
 Volume in drive C is Windows
 Volume Serial Number is 76A4-966B

 Directory of c:\tmp\fixed

11/27/2024  06:18 PM    <DIR>          .
11/27/2024  06:18 PM    <DIR>          ..
11/27/2024  06:18 PM                48 bad_test.chi
11/27/2024  06:18 PM             5,937 TomboMsg.txt
               2 File(s)          5,985 bytes
               2 Dir(s)  1,832,473,001,984 bytes free

C:\tmp\TomboU-3.0.0-beta5>C:\code\puren_tonbo\py3.12.5venv\Scripts\ptcipher.exe c:\tmp\fixed\bad_test.chi

'Puren Tonbo ptcipher Password:'
test

test

Decryption of old Tombo Files

Siarzhuk Zharski — Wed, 27 Nov 2024 20:01:51 -0000

Fixed version 3.0.0-beta6 is availabkle for download.

Decryption of old Tombo Files

Siarzhuk Zharski — Wed, 27 Nov 2024 13:02:10 -0000

Well, the evil lived here:

https://sourceforge.net/p/tombo-u/code/ci/09c47a17db4048ab28a7394e174a0221b30bc845/tree/Src/PasswordDialog.cpp?diff=5aae1ee2099d7c12c80a4b1617e6a46f8f494eb8

in the PasswordDialog::OnOk() handler

+#if 0
pPassword = ConvUnicode2SJIS(pPass1);
-
+#else
+ pPassword = pPass1;
+#endif
WipeOutAndDelete(pPass1);
return (pPassword != NULL);

the returned pointer was assigned directly and correpsonding data was filled with zeroes inside of WipeOutAndDelete(pPass1). That mean that most of the .chi files in "new format" are just encrypted with empty password. :-\ I said "most of them" because the buffer may be reused just after deleting and filled with unknown data. So such notes were encrypted with unknown password data. :-(

So current workaround is following - in case the decryption with user-provided password failed I try to decrypt it again with an empty password. It has worked for all my test files saved with beta5.

Recent posts to Discussion

Decryption of old Tombo Files

Decryption of old Tombo Files

Decryption of old Tombo Files

Decryption of old Tombo Files

bug/mislabel for encoding

64-bit support

bug/mislabel for encoding

Decryption of old Tombo Files

Decryption of old Tombo Files

Decryption of old Tombo Files