Dealing with Kindle for PC/Mac 1.19 and KFX in calibre - Page 54

pdurrant · 06-07-2020, 04:48 AM

I've just had a go with the new kindlekey.py file, and it doesn't work on Mac. I haven't tested on PC.

jhowell · 06-07-2020, 08:34 AM

Quote:

Originally Posted by pdurrant

I've just had a go with the new kindlekey.py file, and it doesn't work on Mac. I haven't tested on PC.

There are separate sections of code for handling PC and Mac platforms in that file. The pull request only changes the PC logic. You would have to add the equivalent logic to the Mac section before testing in order to have a chance of it working.

pdurrant · 06-07-2020, 10:17 AM

Quote:

Originally Posted by jhowell

There are separate sections of code for handling PC and Mac platforms in that file. The pull request only changes the PC logic. You would have to add the equivalent logic to the Mac section before testing in order to have a chance of it working.

I suppose it's just possible that Amazon has finally converged the Mac and PC cryptography code. Worth a try. (I did update it to at least find the .kinf2018 file on Mac.) When I next have some free time...

darryl · 06-07-2020, 08:27 PM

If I get the chance I will repeat the experiment with Win 10. If so I will post a bug on github with the debug log, assuming of course that it does not magically just work.

darryl · 06-07-2020, 10:38 PM

Couldn't resist. Debug log shows it successfully decrypted the key file and shows the ID and username strings used. It then failed in the course of decrypting the KFX-ZIP ebook. The message in the log is that it is decrypting the drm voucher before failing after 7.8 seconds.

I will get around to posting an issue on Github with an anonymised log from a pd title, but not today.

darryl · 06-09-2020, 03:54 AM

I have just opened issue #1118 at Apprentice Harper's github which attaches a log of my attempt to add Kurt Vonnegut's 2 B R 0 2 B, a public domain e-book from Amazon US, to Calibre. The results were similar to what I posted above. I suspect Apprentice Sakuya's pull request is in fact getting the .kinf2018 file and deriving the key, but the algorithm the plugin uses for the actual decryption does not deal properly with the new format. My mediocre abilities with Python and cryptography generally are unsurprisingly exhausted at this point. We can only wait until someone with the appropriate skills has the time and inclination to take matters further. Thanks to Apprentice Sakuya for getting us this far.

seigezunt · 06-09-2020, 12:41 PM

It's odd. I'm finding the plugin works for some new books, and not others, all from the same publisher.

Gibbo · 06-09-2020, 01:27 PM

Quote:

Originally Posted by Gibbo

The way I've overcome the problem was by installing Virtualbox to Mac/Catalina and creating a Windows 10 virtual machine and installing Kindle 1.17, extreme but it works.

Not happy with my setup I downgraded to Mojave installed Kindle 1.17 and it's good to go

jhowell · 06-09-2020, 01:51 PM

Quote:

Originally Posted by seigezunt

It's odd. I'm finding the plugin works for some new books, and not others, all from the same publisher.

If you want assistance with that you should ask for help at either Apprentice Alf's Blog or Apprentice Harper's GitHub.

jhowell · 06-11-2020, 03:07 PM

Quote:

Originally Posted by pdurrant

I suppose it's just possible that Amazon has finally converged the Mac and PC cryptography code. Worth a try. (I did update it to at least find the .kinf2018 file on Mac.) When I next have some free time...

I see that a new pull request has been made at Apprentice Harper's GitHub to add decoding of .kinf2018 files from Kindle for Mac.

(Thanks to apprenticesakuya.)

sergio0p · 06-11-2020, 04:35 PM

I had problems installing the old Kindle version in my Mac. Because these links are not from Amazon, the file was quarantined and I had to use the xattr command in the terminal so I could open the file, see this link. Also, I'm not sure if this old kindle would run in Catalina (I am still using High Sierra).

pdurrant · 06-12-2020, 04:19 AM

Quote:

Originally Posted by jhowell

I see that a new pull request has been made at Apprentice Harper's GitHub to add decoding of .kinf2018 files from Kindle for Mac.

(Thanks to apprenticesakuya.)

As far as I can see, this solves the problem of decrypting the .kinf2018 file on Kindle for Mac. But the new KFX files still don't decrypt.

[EDIT: But disabling KFX and using the right-click download option should work now, even for people who've never had a pre-1.25 Kindle for Mac installed.]

lkmiller · 06-12-2020, 04:53 AM

Quote:

Originally Posted by sergio0p

Also, I'm not sure if this old kindle would run in Catalina (I am still using High Sierra).

No, you're right, it won't. Kindle for Mac version 1.23 and earlier are 32-bit.

odamizu · 06-12-2020, 11:18 PM

Quote:

Originally Posted by jhowell

I see that a new pull request has been made at Apprentice Harper's GitHub to add decoding of .kinf2018 files from Kindle for Mac.

(Thanks to apprenticesakuya.)

This is excellent! Thanks for the heads up!

apprenticesakuya, wherever you are!

Quote:

Originally Posted by pdurrant

As far as I can see, this solves the problem of decrypting the .kinf2018 file on Kindle for Mac. But the new KFX files still don't decrypt.

[EDIT: But disabling KFX and using the right-click download option should work now, even for people who've never had a pre-1.25 Kindle for Mac installed.]

I just did a few quick tests and it does indeed decrypt KF8 on new installations of K4Mac 1.26.1. I tested using the standalone tools on High Sierra, but am very optimistic that apprenticesakuya's excellent work solves the Catalina problem

odamizu · 06-15-2020, 11:54 PM

apprenticesakuya has added another commit on GitHub: "Support KFX VoucherEnvelope versions 2 and 3"

This commit is ion.py rather than kindlekey.py

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06-07-2020, 04:48 AM	#796
pdurrant The Grand Mouse 高貴的老鼠 Posts: 73,989 Karma: 315160596 Join Date: Jul 2007 Location: Norfolk, England Device: Kindle Oasis	I've just had a go with the new kindlekey.py file, and it doesn't work on Mac. I haven't tested on PC.

06-07-2020, 08:27 PM	#799
darryl Wizard Posts: 3,108 Karma: 60231510 Join Date: Nov 2011 Location: Australia Device: Kobo Aura H2O, Kindle Oasis, Huwei Ascend Mate 7	If I get the chance I will repeat the experiment with Win 10. If so I will post a bug on github with the debug log, assuming of course that it does not magically just work.

06-07-2020, 10:38 PM	#800
darryl Wizard Posts: 3,108 Karma: 60231510 Join Date: Nov 2011 Location: Australia Device: Kobo Aura H2O, Kindle Oasis, Huwei Ascend Mate 7	Couldn't resist. Debug log shows it successfully decrypted the key file and shows the ID and username strings used. It then failed in the course of decrypting the KFX-ZIP ebook. The message in the log is that it is decrypting the drm voucher before failing after 7.8 seconds. I will get around to posting an issue on Github with an anonymised log from a pd title, but not today.

06-09-2020, 03:54 AM	#801
darryl Wizard Posts: 3,108 Karma: 60231510 Join Date: Nov 2011 Location: Australia Device: Kobo Aura H2O, Kindle Oasis, Huwei Ascend Mate 7	I have just opened issue #1118 at Apprentice Harper's github which attaches a log of my attempt to add Kurt Vonnegut's 2 B R 0 2 B, a public domain e-book from Amazon US, to Calibre. The results were similar to what I posted above. I suspect Apprentice Sakuya's pull request is in fact getting the .kinf2018 file and deriving the key, but the algorithm the plugin uses for the actual decryption does not deal properly with the new format. My mediocre abilities with Python and cryptography generally are unsurprisingly exhausted at this point. We can only wait until someone with the appropriate skills has the time and inclination to take matters further. Thanks to Apprentice Sakuya for getting us this far.

06-09-2020, 12:41 PM	#802
seigezunt Member Posts: 11 Karma: 10 Join Date: Jan 2011 Device: Dell Axim, Sony PRS-300, Slick	It's odd. I'm finding the plugin works for some new books, and not others, all from the same publisher.

06-11-2020, 04:35 PM	#806
sergio0p Member Posts: 18 Karma: 10 Join Date: Jun 2020 Device: ipad	I had problems installing the old Kindle version in my Mac. Because these links are not from Amazon, the file was quarantined and I had to use the xattr command in the terminal so I could open the file, see this link. Also, I'm not sure if this old kindle would run in Catalina (I am still using High Sierra).

06-15-2020, 11:54 PM	#810
odamizu just an egg Posts: 1,828 Karma: 7943430 Join Date: Mar 2015 Device: Kindle, iOS	apprenticesakuya has added another commit on GitHub: "Support KFX VoucherEnvelope versions 2 and 3" This commit is ion.py rather than kindlekey.py

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