can't remove DRM from epub

[kalani1234-max]

Question / bug report

Can't remove DRM from a epub downloaded from Libby. I have downloaded and opened in Adobe Digital Editions. Then opened the book in Calibre 8.15. Then when i go to convert epub to mobi, it says it cannot convert because the book is locked by DRM.

Which version of Calibre are you running?

8.15

Which version of the DeDRM plugin are you running?

v10.0.9

If applicable, which version of the Kindle software are you running?

No response

Log output

Convert book 1 of 1 (The Younger Wife)
DeDRM v10.0.9: Trying to decrypt cih51liu.epub
DeDRM v10.0.9: Verifying zip archive integrity
DeDRM v10.0.9: cih51liu.epub is a secure Adobe Adept ePub for UUID 58932085-370b-4360-8efd-f0e74e4f06ee
DeDRM v10.0.9: Trying Encryption key default_ade_key_uuid_79477573-2516-4ff0-9742-e075e91283a5
qb2y4fkc.epub is a secure Adobe Adept ePub.
Could not decrypt qb2y4fkc.epub because of an exception:
Traceback (most recent call last):
  File "C:\Users\linli\AppData\Roaming\calibre\plugins\DeDRM.zip\ineptepub.py", line 275, in decryptBook
  File "C:\Users\linli\AppData\Roaming\calibre\plugins\DeDRM.zip\ineptepub.py", line 91, in __init__
  File "Crypto\Cipher\AES.py", line 228, in new
  File "Crypto\Cipher\__init__.py", line 79, in _create_cipher
  File "Crypto\Cipher\_mode_cbc.py", line 274, in _create_cbc_cipher
  File "Crypto\Cipher\AES.py", line 90, in _create_base_cipher
ValueError: Incorrect AES key length (0 bytes)

DeDRM v10.0.9: Failed to decrypt with key default_ade_key_uuid_79477573-2516-4ff0-9742-e075e91283a5 after 0.2 seconds
DeDRM v10.0.9: Looking for new default Adobe Digital Editions Keys after 0.2 seconds
DeDRM v10.0.9: Exception when getting default Adobe Key after 0.2 seconds
Traceback (most recent call last):
  File "calibre_plugins.dedrm.__init__", line 565, in ePubDecrypt
  File "C:\Users\linli\AppData\Roaming\calibre\plugins\DeDRM.zip\adobekey.py", line 293, in adeptkeys
  File "C:\Users\linli\AppData\Roaming\calibre\plugins\DeDRM.zip\adobekey.py", line 273, in CryptUnprotectData
adobekey.ADEPTError: Failed to decrypt user key key (sic)
DeDRM v10.0.9: Ultimately failed to decrypt after 0.2 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
Running file type plugin DeDRM failed with traceback:
Traceback (most recent call last):
  File "calibre\customize\ui.py", line 215, in _run_filetype_plugins
  File "calibre_plugins.dedrm.__init__", line 1041, in run
  File "calibre_plugins.dedrm.__init__", line 639, in ePubDecrypt
calibre_plugins.dedrm.DeDRMError: DeDRM v10.0.9: Ultimately failed to decrypt after 0.2 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
Conversion options changed from defaults:
  output_profile: 'generic_eink'
  verbose: 2
  read_metadata_from_opf: 'C:\\Users\\linli\\AppData\\Local\\Temp\\calibre-wvydp6dt\\g9536_ag.opf'
Resolved conversion options
calibre version: 8.15.0
{'add_alt_text_to_img': False,
 'asciiize': False,
 'author_sort': None,
 'authors': None,
 'base_font_size': 0.0,
 'book_producer': None,
 'change_justification': 'original',
 'chapter': "//*[((name()='h1' or name()='h2') and re:test(., "
            "'\\s*((chapter|book|section|part)\\s+)|((prolog|prologue|epilogue)(\\s+|$))', "
            "'i')) or @class = 'chapter']",
 'chapter_mark': 'pagebreak',
 'comments': None,
 'cover': None,
 'debug_pipeline': None,
 'dehyphenate': True,
 'delete_blank_paragraphs': True,
 'disable_font_rescaling': False,
 'dont_compress': False,
 'duplicate_links_in_toc': False,
 'embed_all_fonts': False,
 'embed_font_family': None,
 'enable_heuristics': False,
 'expand_css': False,
 'extra_css': None,
 'extract_to': None,
 'filter_css': '',
 'fix_indents': True,
 'font_size_mapping': None,
 'format_scene_breaks': True,
 'html_unwrap_factor': 0.4,
 'input_encoding': None,
 'input_profile': <calibre.customize.profiles.InputProfile object at 0x0000027E1422B1D0>,
 'insert_blank_line': False,
 'insert_blank_line_size': 0.5,
 'insert_metadata': False,
 'isbn': None,
 'italicize_common_cases': True,
 'keep_ligatures': False,
 'language': None,
 'level1_toc': None,
 'level2_toc': None,
 'level3_toc': None,
 'line_height': 0.0,
 'linearize_tables': False,
 'margin_bottom': 5.0,
 'margin_left': 5.0,
 'margin_right': 5.0,
 'margin_top': 5.0,
 'markup_chapter_headings': True,
 'max_toc_links': 50,
 'minimum_line_height': 120.0,
 'mobi_file_type': 'old',
 'mobi_ignore_margins': False,
 'mobi_keep_original_images': False,
 'mobi_toc_at_start': False,
 'no_chapters_in_toc': False,
 'no_inline_navbars': False,
 'no_inline_toc': False,
 'output_profile': <calibre.customize.profiles.GenericEink object at 0x0000027E13D53A50>,
 'page_breaks_before': '/',
 'personal_doc': '[PDOC]',
 'prefer_author_sort': False,
 'prefer_metadata_cover': False,
 'pretty_print': False,
 'pubdate': None,
 'publisher': None,
 'rating': None,
 'read_metadata_from_opf': 'C:\\Users\\linli\\AppData\\Local\\Temp\\calibre-wvydp6dt\\g9536_ag.opf',
 'remove_fake_margins': True,
 'remove_first_image': False,
 'remove_paragraph_spacing': False,
 'remove_paragraph_spacing_indent_size': 1.5,
 'renumber_headings': True,
 'replace_scene_breaks': '',
 'search_replace': '[]',
 'series': None,
 'series_index': None,
 'share_not_sync': False,
 'smarten_punctuation': False,
 'sr1_replace': None,
 'sr1_search': None,
 'sr2_replace': None,
 'sr2_search': None,
 'sr3_replace': None,
 'sr3_search': None,
 'start_reading_at': None,
 'subset_embedded_fonts': False,
 'tags': None,
 'timestamp': None,
 'title': None,
 'title_sort': None,
 'toc_filter': None,
 'toc_threshold': 6,
 'toc_title': None,
 'transform_css_rules': '[]',
 'transform_html_rules': '[]',
 'unsmarten_punctuation': False,
 'unwrap_lines': True,
 'use_auto_toc': False,
 'verbose': 2}
DeDRM v10.0.9: Trying to decrypt cih51liu.epub
DeDRM v10.0.9: Verifying zip archive integrity
DeDRM v10.0.9: cih51liu.epub is a secure Adobe Adept ePub for UUID 58932085-370b-4360-8efd-f0e74e4f06ee
DeDRM v10.0.9: Trying Encryption key default_ade_key_uuid_79477573-2516-4ff0-9742-e075e91283a5
666rdj8x.epub is a secure Adobe Adept ePub.
Could not decrypt 666rdj8x.epub because of an exception:
Traceback (most recent call last):
  File "C:\Users\linli\AppData\Roaming\calibre\plugins\DeDRM.zip\ineptepub.py", line 275, in decryptBook
  File "C:\Users\linli\AppData\Roaming\calibre\plugins\DeDRM.zip\ineptepub.py", line 91, in __init__
  File "Crypto\Cipher\AES.py", line 228, in new
  File "Crypto\Cipher\__init__.py", line 79, in _create_cipher
  File "Crypto\Cipher\_mode_cbc.py", line 274, in _create_cbc_cipher
  File "Crypto\Cipher\AES.py", line 90, in _create_base_cipher
ValueError: Incorrect AES key length (0 bytes)

DeDRM v10.0.9: Failed to decrypt with key default_ade_key_uuid_79477573-2516-4ff0-9742-e075e91283a5 after 0.0 seconds
DeDRM v10.0.9: Looking for new default Adobe Digital Editions Keys after 0.0 seconds
DeDRM v10.0.9: Exception when getting default Adobe Key after 0.0 seconds
Traceback (most recent call last):
  File "calibre_plugins.dedrm.__init__", line 565, in ePubDecrypt
  File "C:\Users\linli\AppData\Roaming\calibre\plugins\DeDRM.zip\adobekey.py", line 293, in adeptkeys
  File "C:\Users\linli\AppData\Roaming\calibre\plugins\DeDRM.zip\adobekey.py", line 273, in CryptUnprotectData
adobekey.ADEPTError: Failed to decrypt user key key (sic)
DeDRM v10.0.9: Ultimately failed to decrypt after 0.0 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
Running file type plugin DeDRM failed with traceback:
Traceback (most recent call last):
  File "calibre\customize\ui.py", line 215, in _run_filetype_plugins
  File "calibre_plugins.dedrm.__init__", line 1041, in run
  File "calibre_plugins.dedrm.__init__", line 639, in ePubDecrypt
calibre_plugins.dedrm.DeDRMError: DeDRM v10.0.9: Ultimately failed to decrypt after 0.0 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
InputFormatPlugin: EPUB Input running
on C:\Users\linli\AppData\Local\Temp\calibre-wvydp6dt\cih51liu.epub
Traceback (most recent call last):
  File "runpy.py", line 198, in _run_module_as_main
  File "runpy.py", line 88, in _run_code
  File "site.py", line 83, in <module>
  File "site.py", line 78, in main
  File "site.py", line 50, in run_entry_point
  File "calibre\utils\ipc\worker.py", line 213, in main
  File "calibre\gui2\convert\gui_conversion.py", line 39, in gui_convert_override
  File "calibre\gui2\convert\gui_conversion.py", line 26, in gui_convert
  File "calibre\ebooks\conversion\plumber.py", line 1088, in run
  File "calibre\customize\conversion.py", line 242, in __call__
  File "calibre\ebooks\conversion\plugins\epub_input.py", line 297, in convert
calibre.ebooks.DRMError: cih51liu.epub

[ElleKayEm]

Assuming this was downloaded with ADE installed on the same computer and user as calibre/DeDRM, try deleting the current default key from DeDRM's customization and then re-add the book letting DeDRM automatically retrieve the key.

[kalani1234-max]

I deleted the default key from DeDRM's customization and tried to re-add a new book. got this error:

Convert book 1 of 1 (Wrapped With a Beau)
DeDRM v10.0.3: Trying to decrypt jg9lbc67.epub
DeDRM v10.0.3: Verifying zip archive integrity
DeDRM v10.0.3: jg9lbc67.epub is a secure Adobe Adept ePub for UUID 00533879-6a7b-486a-ac20-e5baf4778c8a
DeDRM v10.0.3: Looking for new default Adobe Digital Editions Keys after 0.1 seconds
DeDRM v10.0.3: Exception when getting default Adobe Key after 0.1 seconds
Traceback (most recent call last):
File "calibre_plugins.dedrm.init", line 591, in ePubDecrypt
File "C:\Users\linli\AppData\Roaming\calibre\plugins\DeDRM.zip\adobekey.py", line 347, in adeptkeys
File "C:\Users\linli\AppData\Roaming\calibre\plugins\DeDRM.zip\adobekey.py", line 327, in CryptUnprotectData
adobekey.ADEPTError: Failed to decrypt user key key (sic)
DeDRM v10.0.3: Ultimately failed to decrypt after 0.2 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
Running file type plugin DeDRM failed with traceback:
Traceback (most recent call last):
File "calibre\customize\ui.py", line 215, in _run_filetype_plugins
File "calibre_plugins.dedrm.init", line 1067, in run
File "calibre_plugins.dedrm.init", line 665, in ePubDecrypt
calibre_plugins.dedrm.DeDRMError: DeDRM v10.0.3: Ultimately failed to decrypt after 0.2 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
Conversion options changed from defaults:
verbose: 2
output_profile: 'generic_eink'
read_metadata_from_opf: 'C:\Users\linli\AppData\Local\Temp\calibre-s9sku9hm\e7pgc6_n.opf'
Resolved conversion options
calibre version: 8.16.1
{'add_alt_text_to_img': False,
'asciiize': False,
'author_sort': None,
'authors': None,
'base_font_size': 0.0,
'book_producer': None,
'change_justification': 'original',
'chapter': "//[((name()='h1' or name()='h2') and re:test(., "
"'\s((chapter|book|section|part)\s+)|((prolog|prologue|epilogue)(\s+|$))', "
"'i')) or @Class = 'chapter']",
'chapter_mark': 'pagebreak',
'comments': None,
'cover': None,
'debug_pipeline': None,
'dehyphenate': True,
'delete_blank_paragraphs': True,
'disable_font_rescaling': False,
'dont_compress': False,
'duplicate_links_in_toc': False,
'embed_all_fonts': False,
'embed_font_family': None,
'enable_heuristics': False,
'expand_css': False,
'extra_css': None,
'extract_to': None,
'filter_css': '',
'fix_indents': True,
'font_size_mapping': None,
'format_scene_breaks': True,
'html_unwrap_factor': 0.4,
'input_encoding': None,
'input_profile': <calibre.customize.profiles.InputProfile object at 0x000001A1E9D9DC90>,
'insert_blank_line': False,
'insert_blank_line_size': 0.5,
'insert_metadata': False,
'isbn': None,
'italicize_common_cases': True,
'keep_ligatures': False,
'language': None,
'level1_toc': None,
'level2_toc': None,
'level3_toc': None,
'line_height': 0.0,
'linearize_tables': False,
'margin_bottom': 5.0,
'margin_left': 5.0,
'margin_right': 5.0,
'margin_top': 5.0,
'markup_chapter_headings': True,
'max_toc_links': 50,
'minimum_line_height': 120.0,
'mobi_file_type': 'old',
'mobi_ignore_margins': False,
'mobi_keep_original_images': False,
'mobi_toc_at_start': False,
'no_chapters_in_toc': False,
'no_inline_navbars': False,
'no_inline_toc': False,
'output_profile': <calibre.customize.profiles.GenericEink object at 0x000001A1E9F62450>,
'page_breaks_before': '/',
'personal_doc': '[PDOC]',
'prefer_author_sort': False,
'prefer_metadata_cover': False,
'pretty_print': False,
'pubdate': None,
'publisher': None,
'rating': None,
'read_metadata_from_opf': 'C:\Users\linli\AppData\Local\Temp\calibre-s9sku9hm\e7pgc6_n.opf',
'remove_fake_margins': True,
'remove_first_image': False,
'remove_paragraph_spacing': False,
'remove_paragraph_spacing_indent_size': 1.5,
'renumber_headings': True,
'replace_scene_breaks': '',
'search_replace': '[]',
'series': None,
'series_index': None,
'share_not_sync': False,
'smarten_punctuation': False,
'sr1_replace': None,
'sr1_search': None,
'sr2_replace': None,
'sr2_search': None,
'sr3_replace': None,
'sr3_search': None,
'start_reading_at': None,
'subset_embedded_fonts': False,
'tags': None,
'timestamp': None,
'title': None,
'title_sort': None,
'toc_filter': None,
'toc_threshold': 6,
'toc_title': None,
'transform_css_rules': '[]',
'transform_html_rules': '[]',
'unsmarten_punctuation': False,
'unwrap_lines': True,
'use_auto_toc': False,
'verbose': 2}
DeDRM v10.0.3: Trying to decrypt jg9lbc67.epub
DeDRM v10.0.3: Verifying zip archive integrity
DeDRM v10.0.3: jg9lbc67.epub is a secure Adobe Adept ePub for UUID 00533879-6a7b-486a-ac20-e5baf4778c8a
DeDRM v10.0.3: Looking for new default Adobe Digital Editions Keys after 0.0 seconds
DeDRM v10.0.3: Exception when getting default Adobe Key after 0.0 seconds
Traceback (most recent call last):
File "calibre_plugins.dedrm.init", line 591, in ePubDecrypt
File "C:\Users\linli\AppData\Roaming\calibre\plugins\DeDRM.zip\adobekey.py", line 347, in adeptkeys
File "C:\Users\linli\AppData\Roaming\calibre\plugins\DeDRM.zip\adobekey.py", line 327, in CryptUnprotectData
adobekey.ADEPTError: Failed to decrypt user key key (sic)
DeDRM v10.0.3: Ultimately failed to decrypt after 0.0 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
Running file type plugin DeDRM failed with traceback:
Traceback (most recent call last):
File "calibre\customize\ui.py", line 215, in _run_filetype_plugins
File "calibre_plugins.dedrm.init", line 1067, in run
File "calibre_plugins.dedrm.init", line 665, in ePubDecrypt
calibre_plugins.dedrm.DeDRMError: DeDRM v10.0.3: Ultimately failed to decrypt after 0.0 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
InputFormatPlugin: EPUB Input running
on C:\Users\linli\AppData\Local\Temp\calibre-s9sku9hm\jg9lbc67.epub
Traceback (most recent call last):
File "runpy.py", line 198, in _run_module_as_main
File "runpy.py", line 88, in _run_code
File "site.py", line 83, in
File "site.py", line 78, in main
File "site.py", line 50, in run_entry_point
File "calibre\utils\ipc\worker.py", line 213, in main
File "calibre\gui2\convert\gui_conversion.py", line 39, in gui_convert_override
File "calibre\gui2\convert\gui_conversion.py", line 26, in gui_convert
File "calibre\ebooks\conversion\plumber.py", line 1088, in run
File "calibre\customize\conversion.py", line 242, in call
File "calibre\ebooks\conversion\plugins\epub_input.py", line 297, in convert
calibre.ebooks.DRMError: jg9lbc67.epub

[ElleKayEm]

You downgraded DeDRM? Try again with 10.0.9. And if it doesn't work post a log of when you first add the book, not a conversion attempt.