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Old 07-06-2021, 02:34 AM   #1
soutade
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ADE alternative for Linux

Hello everybody,

If (like me), you're fed up to reboot on Windows in order to launch ADE or use a very old version in combination to WINE, you're at the right place !

After a long reverse engineering work, I created a library that is a free implementation of ADEPT protocol. It also contains two (command line) utils allowing you to create a new device, register it to Adobe's servers and download ePub from ACSM request files.

You can find sources & binaries here : http://indefero.soutade.fr/p/libgourou

Cheers


Grégory
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Old 07-06-2021, 08:45 AM   #2
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I'd even use it with Windows (Linux sub-system) if it works. I'll definitely try it this weekend.
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Old 07-06-2021, 12:24 PM   #3
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I would love to be able to use this!

Unfortunately, I fail already at the device creation step. "activate" gives me

Code:
Exception code : 0x5006
Message        : Invalid key size 16
The file set in .adobe is created, but when using it with "acsmdownloader", it fails with an error as well (as the generated key apparently is invalid). Is there a way to go around this?

Unfortunately, I never activated any of my e-readers at Adobe and I do not own a Windows computer any longer. The wine installation of ADE does not recognize the device and thus cannot register it either. Therefore, I cannot test to use the files from an activated e-reader either.

Many thanks in advance!

Cheers,

Jens
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Old 07-06-2021, 02:40 PM   #4
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Quote:
Originally Posted by soutade View Post
Hello everybody,

If (like me), you're fed up to reboot on Windows in order to launch ADE or use a very old version in combination to WINE, you're at the right place !

After a long reverse engineering work, I created a library that is a free implementation of ADEPT protocol. It also contains two (command line) utils allowing you to create a new device, register it to Adobe's servers and download ePub from ACSM request files.

You can find sources & binaries here : http://indefero.soutade.fr/p/libgourou

Cheers


Grégory
The problem is that you still need a registered ADE install to be able to get the key to remove the DRM. This solution may work after you get the key from a registered ADE but without the key, this solution is not a solution.

Does this block the new hardened DRM?
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Old 07-06-2021, 03:08 PM   #5
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Quote:
Originally Posted by sadowski View Post
I would love to be able to use this!

Unfortunately, I fail already at the device creation step. "activate" gives me

Code:
Exception code : 0x5006
Message        : Invalid key size 16
I'm really sorry, it's a bug from me
I updated the package, it should works fine now (activate & download)
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Old 07-06-2021, 03:11 PM   #6
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Quote:
Originally Posted by JSWolf View Post
The problem is that you still need a registered ADE install to be able to get the key to remove the DRM. This solution may work after you get the key from a registered ADE but without the key, this solution is not a solution.

Does this block the new hardened DRM?
It acts like ADE would (generate keys, device registration, ePub download).
ePub file you download still contains Adobe DRM, but you should be able to read it with an eReader that supports Adobe's DRM encryption (or use a service like Calibre).

As it's a library, I think, it could be embedded into reader software (like koreader) to support DRM, but I don't know if it's what they want.
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Old 07-06-2021, 03:16 PM   #7
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Quote:
Originally Posted by soutade View Post
It acts like ADE would (generate keys, device registration, ePub download).
ePub file you download still contains Adobe DRM, but you should be able to read it with an eReader that supports Adobe's DRM encryption (or use a service like Calibre).

As it's a library, I think, it could be embedded into reader software (like koreader) to support DRM, but I don't know if it's what they want.
It doesn't act like ADE for the DeDRM Calibre plugin. You cannot get the key that DeDRM needs to do it's DRM removal. You still need an installed and registered ADE to get the key for DeDRM.
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Old 07-06-2021, 03:31 PM   #8
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Not a real replacement for ADE but a work around
https://www.mobileread.com/forums/sh...38&postcount=2
If any one knows how to get the key file from ADE Android you don't need windows
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Old 07-06-2021, 03:35 PM   #9
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Quote:
Originally Posted by JSWolf View Post
It doesn't act like ADE for the DeDRM Calibre plugin. You cannot get the key that DeDRM needs to do it's DRM removal. You still need an installed and registered ADE to get the key for DeDRM.
All the needed keys are located in (with libgourou) .adept directory :
* devicesalt for local encryption
* activation.xml that contains encrypted RSA public/private keys

devicesalt helps to decrypt RSA keys, that are then used to retrieve AES key used for ePub encryption.

Key generation is partially done locally (devicesalt + unencrypted RSA) and remotely (encrypted RSA).

libgourou manage key generation & server exchange in order to build all these files with right data.

For your question :

Quote:
Originally Posted by JSWolf View Post
Does this block the new hardened DRM?
I don't know, the target hobbes version is 10.0.4; but I know there is a version 11 running
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Old 07-06-2021, 03:40 PM   #10
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Quote:
Originally Posted by LinuxArie View Post
Not a real replacement for ADE but a work around
https://www.mobileread.com/forums/sh...38&postcount=2
If any one knows how to get the key file from ADE Android you don't need windows
With libgourou, you don't need the same files. You can create a new "device" from your computer with the same AdobeID (it will retrieve all needed keys). After that, you have to use Calibre for DeDRM if you want to read it in clear, or put it on a device that supports Adobe's DRM.
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Old 07-06-2021, 04:47 PM   #11
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Not a real replacement for ADE but a work around
https://www.mobileread.com/forums/sh...38&postcount=2
If any one knows how to get the key file from ADE Android you don't need windows
That assumes you have an Android device. Not everyone has such.
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Old 07-06-2021, 11:25 PM   #12
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I expect that it also works with an iphone / ipad, but I don't have those so I cannot test it. Android tablets work also
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Old 07-07-2021, 12:01 AM   #13
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Quote:
Originally Posted by soutade View Post
I'm really sorry, it's a bug from me
I updated the package, it should works fine now (activate & download)
Registration works now--many thanks! I get
Code:
... fully signed and device activated in ...
Unfortunately, now the downloader spits out this:

Code:
Exception code : 0x1003
Message        : E_ADEPT_USER_AUTH http://drm.ebookshipping.com:8080/fulfillment/Fulfill urn:uuid:12ee6268-df92-4869-b0fb-f2d62dcbb41f
I still can download the book via the same acsm file in ADE 2.0.
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Old 07-07-2021, 04:21 AM   #14
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Quote:
Originally Posted by sadowski View Post
Registration works now--many thanks! I get
Code:
... fully signed and device activated in ...
Unfortunately, now the downloader spits out this:

Code:
Exception code : 0x1003
Message        : E_ADEPT_USER_AUTH http://drm.ebookshipping.com:8080/fulfillment/Fulfill urn:uuid:12ee6268-df92-4869-b0fb-f2d62dcbb41f
I still can download the book via the same acsm file in ADE 2.0.
Has that eBook ben previously been downloaded with ADE? If o, try an eBook that's not been previously downloaded.
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Old 07-07-2021, 08:11 AM   #15
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Quote:
Originally Posted by JSWolf View Post
Has that eBook ben previously been downloaded with ADE? If o, try an eBook that's not been previously downloaded.
I can at least open it in another instance of ADE (also another version: 4.5 instead of 2.0) on another computer that has not seen it previously.

I will buy a new book tonight and try this first in the downloader, before I fall back to ADE.
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