apt install winetricks:i386
Run winetricks and install app: adobe digital edition
With winetricks opend a commandline shell in “adobe digital edition” wineprefix
Download python 32 bit installer and install with GUI “wine uninstaller”
Install win openssl from http://slproweb.com/products/Win32OpenSSL.html
wine ~/Scaricati/Win32OpenSSL_Light-1_0_2h.exe
Install pycrypto from http://www.voidspace.org.uk/downloads/pycrypto26/pycrypto-2.6.win32-py2.7.exe
wine ~/Scaricati/pycrypto-2.6.win32-py2.7.exe
Download https://github.com/apprenticeharper/DeDRM_tools, unzip and from wineprefix dir run key tool
cd ~.local/share/wineprefixes/adobe_diged/drive_c/Python27 wine python ~/Scaricati/DeDRM_tools-master/Other_Tools/DRM_Key_Scripts/Adobe_Digital_Editions/adobekey.pyw
Now key is in ~/Scaricati/DeDRM_tools-master/Other_Tools/DRM_Key_Scripts/Adobe_Digital_Editions/
Import key with calibre plugin DeDRM → Adobe Digital Editions ebooks → Import Existing Keyfiles