soutade/libgourou
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Works very good on kortext reader android app #20

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opened 2026-01-29 02:03:30 +01:00 by iouzzr · 0 comments
iouzzr commented 2026-01-29 02:03:30 +01:00
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Hi Soutade,
Thank you for this great software. I tried on my rooted android phone and have successfully exported the private key for dedrm to use.

Kortext does not provide Adobe ID so I can't use adept_activate. However with rooted android, there's .adept folder in Android/data/, so that I can use:

./acsmdownloader -e -d /home/admin/.adept/device.xml -a /home/admin/.adept/activation.xml -k /home/admin/.adept/salt

P.S. On kortext, devicesalt is called salt and there's an extra file called device (Chatgpt told me that's just a SHA256 hash).

I can use the exported .der key with dedrm in calibre to remove the drm. However, the utils you provide result no exception, but the generated pdf file does no open:

admin@ip-172-26-4-204:~/libgourou_utils-0.8.8-x86_64.AppImage$ ./adept_remove -d /home/admin/.adept/device.xml -a /home/admin/.adep
t/activation.xml -k /home/admin/.adept/salt '/home/admin/pdf/Artificial Intelligence A Modern Approach, eBook, Global Edition.pdf'
DRM removed from /home/admin/pdf/Artificial Intelligence A Modern Approach, eBook, Global Edition.pdf

Another small issue I think is that the -O option is not working as expected:

admin@ip-172-26-4-204:~/libgourou_utils-0.8.8-x86_64.AppImage$ ./adept_remove -O /home/admin/pdf/drm_remove -d /home/admin/.adept/device.xml -a /home/admin/.adept/activation.xml -k /home/admin/.adept/salt '/home/admin/pdf/Artificial Intelligence A Modern Approach, eBook, Global Edition.pdf'
Exception code : 0x1004
Message        : Unable to create /home/admin/pdf/drm_remove//home/admin/pdf/Artificial Intelligence A Modern Approach, eBook, Global Edition.pdf
Hi Soutade, Thank you for this great software. I tried on my rooted android phone and have successfully exported the private key for dedrm to use. Kortext does not provide Adobe ID so I can't use adept_activate. However with rooted android, there's .adept folder in Android/data/, so that I can use: ``` ./acsmdownloader -e -d /home/admin/.adept/device.xml -a /home/admin/.adept/activation.xml -k /home/admin/.adept/salt ``` P.S. On kortext, devicesalt is called salt and there's an extra file called device (Chatgpt told me that's just a SHA256 hash). I can use the exported .der key with dedrm in calibre to remove the drm. However, the utils you provide result no exception, but the generated pdf file does no open: ``` admin@ip-172-26-4-204:~/libgourou_utils-0.8.8-x86_64.AppImage$ ./adept_remove -d /home/admin/.adept/device.xml -a /home/admin/.adep t/activation.xml -k /home/admin/.adept/salt '/home/admin/pdf/Artificial Intelligence A Modern Approach, eBook, Global Edition.pdf' DRM removed from /home/admin/pdf/Artificial Intelligence A Modern Approach, eBook, Global Edition.pdf ``` Another small issue I think is that the -O option is not working as expected: ``` admin@ip-172-26-4-204:~/libgourou_utils-0.8.8-x86_64.AppImage$ ./adept_remove -O /home/admin/pdf/drm_remove -d /home/admin/.adept/device.xml -a /home/admin/.adept/activation.xml -k /home/admin/.adept/salt '/home/admin/pdf/Artificial Intelligence A Modern Approach, eBook, Global Edition.pdf' Exception code : 0x1004 Message : Unable to create /home/admin/pdf/drm_remove//home/admin/pdf/Artificial Intelligence A Modern Approach, eBook, Global Edition.pdf ```
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Reference: soutade/libgourou#20
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