Debug output from calibre below:

C:\Users\Owner>calibre-debug -g
calibre 1.19  isfrozen: True is64bit: False
Windows-7-6.1.7601-SP1 Windows ('32bit', 'WindowsPE')
32bit process running on 64bit windows
('Windows', '7', '6.1.7601')
Python 2.7.5
Windows: ('7', '6.1.7601', 'SP1', 'Multiprocessor Free')
Starting up...
Started up in 1.19 seconds with 1 books
Worker Launch took: 0.219000101089
Job: 1 Read metadata (0 of 1) finished
Read metadata (0 of 1)
        DeDRM v6.0.8: Trying to decrypt antifragile_9780679645276.epub
        DeDRM v6.0.8: Verifying zip archive integrity
        DeDRM v6.0.8: “antifragile_9780679645276.epub” is a secure Barnes & Nobl
e ePub
        DeDRM v6.0.8: Trying Encryption key myKey
        Could not decrypt eobdwq.epub because of an exception:
        Traceback (most recent call last):
          File "calibre_plugins.dedrm.ignobleepub", line 278, in decryptBook
          File "calibre_plugins.dedrm.ignobleepub", line 209, in __init__
          File "calibre_plugins.dedrm.ignobleepub", line 180, in __init__
        ValueError: Key cannot be the null string

        DeDRM v6.0.8: Failed to decrypt with key myKey after 0.3 seconds
        DeDRM v6.0.8: Ultimately failed to decrypt after 0.3 seconds.
        Read the FAQs at Alf's blog: http://apprenticealf.wordpress.com/
        Running file type plugin DeDRM failed with traceback:
        Traceback (most recent call last):
          File "site-packages\calibre\customize\ui.py", line 154, in _run_filety
pe_plugins
          File "calibre_plugins.dedrm.__init__", line 482, in run
          File "calibre_plugins.dedrm.__init__", line 180, in ePubDecrypt
        DeDRMError: DeDRM v6.0.8: Ultimately failed to decrypt “antifragile_9780
679645276.epub” after 0.3 seconds.

Added Antifragile: Things That Gain from Disorder to db in: 1.21700000763 second
s
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Below is debug output from running ignoblekeygen_copy.py from the command line.  PyCrypto 2.3 and Python 2.7.6 (32-bit) are installed.  (When I originally had PyCrypto 2.1 installed, the same key was generated.)  ignoblekeygen_copy.py is the  same as ignoblekeygen.py except that it has print statements added in the generate_key() function.  I have added parentheses around the arguments to these print statements to make the digest variables more readable.  For example:

print('name_sha is', name_sha)

I used this syntax for all print statements to make the output consistent.

C:\Users\Owner\Documents\DeDRM_App\DeDRM_lib\lib>ignoblekeygen_copy.py jonathansmith 5555555555555555 trialcopy.b64
('name_sha is', '\xdc\xed~\x96Jw\x90V0C>\xb3H\xe2\xa5\xa2')
('ccn_sha is', 'nL\x08(\\\xd6\x92$|@V\xd6o\x10\x99\x04')
('both_sha is', '\x02S\xecJ\xdd\x9d\xf8TI\x0bQ\x80\x1e1\xfd\xd0H\xc4\xa7y')
('aes is', <__main__.AES object at 0x02386230>)
('crypt is', 'i\xe2>\xc9\x17P\xbe\x9fE\xcb\xd9\xf9\xe6\xb99Q\xab\xf5\xe62!\x84u\
x19\xbd\x96\xef\xb0\x80\x9f<\xd3')
('userkey is', '\x0e\xc0\x13\x8e\xf4h\xf4\xb3\xd9\xb3\x15\x86\xffS"\xd5I[\xbd\xb
8')
('returnVal is', 'DsATjvRo9LPZsxWG/1Mi1Ulbvbg=\n')