Adobe PassHash is a variant of the Adobe DRM which is used by retailers like Barnes and Noble. Instead of using certificates and device-based authorization, this uses a username and password combination. In B&&Ns implementation however, the user never gets access to these credentials, just to the credential hash.
+ +Since 2014, Barnes & Noble is no longer using the default Adobe key generation algorithm, which used to be the full name as "username" and the full credit card number as "password" for the PassHash algorithm. +Instead, they started generating a random key on their server and send that to the reading application during login. This means that the old method to decrypt these books will no longer work.
+ +There used to be a way to use the Android app's API to simulate a login to the Barnes and Noble servers, but that API has been shut down a while ago, too, and so far nobody has reverse-engineered the new one.
+ +On the right-hand side of the plugin’s customization dialog, you will see a button with an icon that looks like a green plus sign (+). Clicking this button will open a new dialog for entering the necessary data to generate a new key.
+Currently, the only known ways to access the key are the following:
+After you've selected a key retrieval method from the settings, the dialog may change and request some additional information depending on the key retrieval method. Enter that, then click the OK button to create and store the generated key. Or Cancel if you don’t want to create a key.
+New keys are checked against the current list of keys before being added, and duplicates are discarded.
+ +On the right-hand side of the plugin’s customization dialog, you will see a button with an icon that looks like a red "X". Clicking this button will delete the highlighted key in the list. You will be prompted once to be sure that’s what you truly mean to do. Once gone, it’s permanently gone.
+ +On the right-hand side of the plugin’s customization dialog, you will see a button with an icon that looks like a sheet of paper. Clicking this button will prompt you to enter a new name for the highlighted key in the list. Enter the new name for the encryption key and click the OK button to use the new name, or Cancel to revert to the old name..
+ +On the right-hand side of the plugin’s customization dialog, you will see a button with an icon that looks like a computer’s hard-drive. Use this button to export the highlighted key to a file (with a ‘.b64’ file name extension). Used for backup purposes or to migrate key data to other computers/calibre installations. The dialog will prompt you for a place to save the file.
+ +At the bottom-left of the plugin’s customization dialog, you will see a button labeled "Import Existing Keyfiles". Use this button to import existing ‘.b64’ key files. Key files might come from being exported from this or older plugins, or may have been generated using the original i♥cabbages script, or you may have made it by following the instructions above.
+ +Once done creating/deleting/renaming/importing decryption keys, click Close to exit the customization dialogue. Your changes will only be saved permanently when you click OK in the main configuration dialog.
+ + + + diff --git a/DeDRM_plugin/DeDRM_Barnes and Noble Key_Help.htm b/DeDRM_plugin/DeDRM_Barnes and Noble Key_Help.htm deleted file mode 100644 index 2b78ee9..0000000 --- a/DeDRM_plugin/DeDRM_Barnes and Noble Key_Help.htm +++ /dev/null @@ -1,68 +0,0 @@ - - - - - - -If you have upgraded from an earlier version of the plugin, any existing Barnes and Noble keys will have been automatically imported, so you might not need to do any more configuration. Continue reading for key generation and management instructions.
- -In mid-2014, Barnes & Noble changed the way they generated encryption keys. Instead of deriving the key from the user's name and credit card number, they started generating a random key themselves, sending that key through to devices when they connected to the Barnes & Noble servers. This means that most users will now find that no combination of their name and CC# will work in decrypting their recently downloaded ebooks.
- -Someone commenting at Apprentice Alf's blog detailed a way to retrieve a new account key using the account's email address and password. This method has now been incorporated into the plugin. - -
On the right-hand side of the plugin’s customization dialog, you will see a button with an icon that looks like a green plus sign (+). Clicking this button will open a new dialog for entering the necessary data to generate a new key.
-Click the OK button to create and store the generated key. Or Cancel if you don’t want to create a key.
-New keys are checked against the current list of keys before being added, and duplicates are discarded.
- -On the right-hand side of the plugin’s customization dialog, you will see a button with an icon that looks like a red "X". Clicking this button will delete the highlighted key in the list. You will be prompted once to be sure that’s what you truly mean to do. Once gone, it’s permanently gone.
- -On the right-hand side of the plugin’s customization dialog, you will see a button with an icon that looks like a sheet of paper. Clicking this button will prompt you to enter a new name for the highlighted key in the list. Enter the new name for the encryption key and click the OK button to use the new name, or Cancel to revert to the old name..
- -On the right-hand side of the plugin’s customization dialog, you will see a button with an icon that looks like a computer’s hard-drive. Use this button to export the highlighted key to a file (with a ‘.b64’ file name extension). Used for backup purposes or to migrate key data to other computers/calibre installations. The dialog will prompt you for a place to save the file.
- -At the bottom-left of the plugin’s customization dialog, you will see a button labeled "Import Existing Keyfiles". Use this button to import existing ‘.b64’ key files. Key files might come from being exported from this or older plugins, or may have been generated using the original i♥cabbages script, or you may have made it by following the instructions above.
- -Once done creating/deleting/renaming/importing decryption keys, click Close to exit the customization dialogue. Your changes will only be saved permanently when you click OK in the main configuration dialog.
- -Books downloaded through NOOK Study may or may not use the key found using the above method. If a book is not decrypted successfully with any of the keys, the plugin will attempt to recover keys from the NOOK Study log file and use them.
- - - - - -