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Add useful error message for the new, uncracked ADEPT DRM

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This commit is contained in:
NoDRM
2021-11-15 19:51:36 +01:00
parent 40a8e4360b
commit 88dd1350c0
3 changed files with 36 additions and 1 deletions
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9
DeDRM_plugin/ineptepub.py
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@@ -110,6 +110,9 @@ def unicode_argv():
class ADEPTError(Exception):
pass
class ADEPTNewVersionError(Exception):
pass
def _load_crypto_libcrypto():
from ctypes import CDLL, POINTER, c_void_p, c_char_p, c_int, c_long, \
Structure, c_ulong, create_string_buffer, cast
@@ -468,6 +471,12 @@ def decryptBook(userkey, inpath, outpath):
adept = lambda tag: '{%s}%s' % (NSMAP['adept'], tag)
expr = './/%s' % (adept('encryptedKey'),)
bookkey = ''.join(rights.findtext(expr))
if len(bookkey) == 192:
print("{0:s} seems to be an Adobe ADEPT ePub with Adobe's new DRM".format(os.path.basename(inpath)))
print("This DRM cannot be removed yet. ")
print("Try getting your distributor to give you a new ACSM file, then open that in an old version of ADE (2.0).")
print("If your book distributor is not enforcing the new DRM yet, this will give you a copy with the old DRM.")
raise ADEPTNewVersionError("Book uses new ADEPT encryption")
if len(bookkey) != 172:
print("{0:s} is not a secure Adobe Adept ePub.".format(os.path.basename(inpath)))
return 1