v0.0.8: PDF fixes & ACSM file type config
This commit is contained in:
Florian Bach
parent
61bebdd906
commit
36b28765dd
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@ -12,10 +12,11 @@
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# v0.0.5: Bugfix: DeDRM plugin was also executed if it's installed but disabled.
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# v0.0.6: First PDF support, allow importing previously exported activation data.
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# v0.0.7: More PDF logging, PDF reading in latin-1, MacOS locale bugfix
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# v0.0.8: More PDF bugfixes, support unlimited PDF file sizes, tell Calibre ACSMs are books.
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from calibre.customize import FileTypePlugin # type: ignore
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__version__ = '0.0.7'
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__version__ = '0.0.8'
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PLUGIN_NAME = "DeACSM"
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PLUGIN_VERSION_TUPLE = tuple([int(x) for x in __version__.split(".")])
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@ -24,7 +25,7 @@ PLUGIN_VERSION = ".".join([str(x)for x in PLUGIN_VERSION_TUPLE])
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from calibre.utils.config import config_dir # type: ignore
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import os, shutil, traceback, sys
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import os, shutil, traceback, sys, time
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import zipfile
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from lxml import etree
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@ -49,6 +50,18 @@ class DeACSM(FileTypePlugin):
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"""
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try:
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# Patch Calibre to consider "ACSM" a book. This makes ACSM files show up
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# in the "Add Book" file selection, and it also makes the auto-add feature useable.
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try:
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from calibre.ebooks import BOOK_EXTENSIONS
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if ("acsm" not in BOOK_EXTENSIONS):
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BOOK_EXTENSIONS.append("acsm")
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except:
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print("{0} v{1}: Couldn't add ACSM to book extension list:".format(PLUGIN_NAME, PLUGIN_VERSION))
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traceback.print_exc()
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self.pluginsdir = os.path.join(config_dir,"plugins")
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if not os.path.exists(self.pluginsdir):
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os.mkdir(self.pluginsdir)
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@ -167,21 +180,21 @@ class DeACSM(FileTypePlugin):
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try:
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from calibre_plugins.deacsm.libadobe import sendHTTPRequest
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from calibre_plugins.deacsm.libadobe import sendHTTPRequest_DL2FILE
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from calibre_plugins.deacsm.libadobeFulfill import buildRights, fulfill
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except:
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try:
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from libadobe import sendHTTPRequest
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from libadobe import sendHTTPRequest_DL2FILE
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from libadobeFulfill import buildRights, fulfill
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except:
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print("{0} v{1}: Error while importing Fulfillment stuff".format(PLUGIN_NAME, PLUGIN_VERSION))
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traceback.print_exc()
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try:
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from calibre_plugins.deacsm.libpdf import patch_drm_into_pdf, prepare_string_from_xml
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from calibre_plugins.deacsm.libpdf import patch_drm_into_pdf
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except:
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try:
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from libpdf import patch_drm_into_pdf, prepare_string_from_xml
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from libpdf import patch_drm_into_pdf
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except:
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print("{0} v{1}: Error while importing PDF patch".format(PLUGIN_NAME, PLUGIN_VERSION))
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traceback.print_exc()
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@ -190,9 +203,7 @@ class DeACSM(FileTypePlugin):
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adobe_fulfill_response = etree.fromstring(replyData)
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NSMAP = { "adept" : "http://ns.adobe.com/adept" }
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adNS = lambda tag: '{%s}%s' % ('http://ns.adobe.com/adept', tag)
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adDC = lambda tag: '{%s}%s' % ('http://purl.org/dc/elements/1.1/', tag)
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metadata_node = adobe_fulfill_response.find("./%s/%s/%s" % (adNS("fulfillmentResult"), adNS("resourceItemInfo"), adNS("metadata")))
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download_url = adobe_fulfill_response.find("./%s/%s/%s" % (adNS("fulfillmentResult"), adNS("resourceItemInfo"), adNS("src"))).text
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license_token_node = adobe_fulfill_response.find("./%s/%s/%s" % (adNS("fulfillmentResult"), adNS("resourceItemInfo"), adNS("licenseToken")))
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@ -205,9 +216,25 @@ class DeACSM(FileTypePlugin):
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# Download eBook:
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print("{0} v{1}: Loading book from {2}".format(PLUGIN_NAME, PLUGIN_VERSION, download_url))
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book_content = sendHTTPRequest(download_url)
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filename_tmp = self.temporary_file(".blob").name
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dl_start_time = int(time.time() * 1000)
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ret = sendHTTPRequest_DL2FILE(download_url, filename_tmp)
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dl_end_time = int(time.time() * 1000)
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print("Download took %d ms (HTTP %d)" % (dl_end_time - dl_start_time, ret))
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if (ret != 200):
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print("{0} v{1}: Download failed with error {2}".format(PLUGIN_NAME, PLUGIN_VERSION, ret))
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return None
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filetype = ".bin"
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book_content = None
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with open(filename_tmp, "rb") as f:
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book_content = f.read(10)
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if (book_content.startswith(b"PK")):
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print("That's a ZIP file -> EPUB")
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filetype = ".epub"
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@ -217,23 +244,9 @@ class DeACSM(FileTypePlugin):
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filename = self.temporary_file(filetype).name
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author = "None"
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title = "None"
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try:
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title = metadata_node.find("./%s" % (adDC("title"))).text
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author = metadata_node.find("./%s" % (adDC("creator"))).text
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# Move to file name with matching extension
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shutil.move(filename_tmp, filename)
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title = title.replace("(", "").replace(")", "").replace("/", "")
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author = author.replace("(", "").replace(")", "").replace("/", "")
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except:
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pass
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# Store book:
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f = open(filename, "wb")
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f.write(book_content)
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f.close()
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if filetype == ".epub":
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# Store EPUB rights / encryption stuff
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@ -244,10 +257,19 @@ class DeACSM(FileTypePlugin):
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return filename
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elif filetype == ".pdf":
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adobe_fulfill_response = etree.fromstring(rights_xml_str)
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NSMAP = { "adept" : "http://ns.adobe.com/adept" }
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adNS = lambda tag: '{%s}%s' % ('http://ns.adobe.com/adept', tag)
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resource = adobe_fulfill_response.find("./%s/%s" % (adNS("licenseToken"), adNS("resource"))).text
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print("{0} v{1}: Downloaded PDF, adding encryption config ...".format(PLUGIN_NAME, PLUGIN_VERSION))
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pdf_tmp_file = self.temporary_file(filetype).name
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patch_drm_into_pdf(filename, prepare_string_from_xml(rights_xml_str, title, author), pdf_tmp_file)
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print("{0} v{1}: File successfully fulfilled ...".format(PLUGIN_NAME, PLUGIN_VERSION))
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ret = patch_drm_into_pdf(filename, rights_xml_str, pdf_tmp_file, resource)
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if (ret):
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print("{0} v{1}: File successfully fulfilled ...".format(PLUGIN_NAME, PLUGIN_VERSION))
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else:
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print("{0} v{1}: There was an error patching the PDF file.".format(PLUGIN_NAME, PLUGIN_VERSION))
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return pdf_tmp_file
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else:
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print("{0} v{1}: Error: Unsupported file type ...".format(PLUGIN_NAME, PLUGIN_VERSION))
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@ -7,7 +7,7 @@ This is an experimental Python version of libgourou.
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# pyright: reportUndefinedVariable=false
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import sys, os
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import sys, os, time, shutil
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if sys.version_info[0] < 3:
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print("This script requires Python 3.")
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exit(1)
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@ -15,9 +15,9 @@ if sys.version_info[0] < 3:
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import zipfile
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from lxml import etree
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from libadobe import sendHTTPRequest
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from libadobe import sendHTTPRequest_DL2FILE
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from libadobeFulfill import buildRights, fulfill
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from libpdf import patch_drm_into_pdf, prepare_string_from_xml
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from libpdf import patch_drm_into_pdf
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FILE_DEVICEKEY = "devicesalt"
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FILE_DEVICEXML = "device.xml"
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@ -48,28 +48,31 @@ def download(replyData):
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exit(1)
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book_name = None
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author = "None"
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title = "None"
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try:
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book_name = metadata_node.find("./%s" % (adDC("title"))).text
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except:
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book_name = "Book"
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try:
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title = metadata_node.find("./%s" % (adDC("title"))).text
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author = metadata_node.find("./%s" % (adDC("creator"))).text
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title = title.replace("(", "").replace(")", "").replace("/", "")
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author = author.replace("(", "").replace(")", "").replace("/", "")
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except:
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pass
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# Download eBook:
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print(download_url)
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book_content = sendHTTPRequest(download_url)
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filename_tmp = book_name + ".tmp"
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dl_start_time = int(time.time() * 1000)
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ret = sendHTTPRequest_DL2FILE(download_url, filename_tmp)
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dl_end_time = int(time.time() * 1000)
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print("Download took %d milliseconds" % (dl_end_time - dl_start_time))
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if (ret != 200):
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print("Download failed with error %d" % (ret))
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exit()
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with open(filename_tmp, "rb") as f:
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book_content = f.read(10)
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filetype = ".bin"
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if (book_content.startswith(b"PK")):
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@ -80,11 +83,7 @@ def download(replyData):
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filetype = ".pdf"
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filename = book_name + filetype
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# Store book:
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f = open(filename, "wb")
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f.write(book_content)
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f.close()
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shutil.move(filename_tmp, filename)
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if filetype == ".epub":
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# Store EPUB rights / encryption stuff
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@ -97,11 +96,20 @@ def download(replyData):
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elif filetype == ".pdf":
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print("Successfully downloaded PDF, patching encryption ...")
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adobe_fulfill_response = etree.fromstring(rights_xml_str)
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NSMAP = { "adept" : "http://ns.adobe.com/adept" }
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adNS = lambda tag: '{%s}%s' % ('http://ns.adobe.com/adept', tag)
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resource = adobe_fulfill_response.find("./%s/%s" % (adNS("licenseToken"), adNS("resource"))).text
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os.rename(filename, "tmp_" + filename)
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patch_drm_into_pdf("tmp_" + filename, prepare_string_from_xml(rights_xml_str, author, title), filename)
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ret = patch_drm_into_pdf("tmp_" + filename, rights_xml_str, filename, resource)
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os.remove("tmp_" + filename)
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print("File successfully fulfilled to " + filename)
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if (ret):
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print("File successfully fulfilled to " + filename)
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else:
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print("Errors occurred while patching " + filename)
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exit(1)
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exit(0)
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else:
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print("Error: Weird filetype")
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@ -121,6 +121,40 @@ def makeFingerprint(serial: str):
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############################################## HTTP stuff:
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def sendHTTPRequest_DL2FILE(URL: str, outputfile: str):
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headers = {
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"Accept": "*/*",
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"User-Agent": "book2png",
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}
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req = urllib.request.Request(url=URL, headers=headers)
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handler = urllib.request.urlopen(req)
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chunksize = 16 * 1024
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ret_code = handler.getcode()
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loc = None
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try:
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loc = req.headers.get("Location")
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except:
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pass
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if loc is not None:
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return sendHTTPRequest_DL2FILE(loc)
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if ret_code != 200:
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return ret_code
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with open(outputfile, "wb") as f:
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while True:
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chunk = handler.read(chunksize)
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if not chunk:
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break
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f.write(chunk)
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return 200
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def sendHTTPRequest_getSimple(URL: str):
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headers = {
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@ -1,112 +1,221 @@
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import os, zlib, base64
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from lxml import etree
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import os, zlib, base64, time
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class BackwardReader:
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def read_reverse_order(file_name):
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# Open file for reading in binary mode
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with open(file_name, 'rb') as read_obj:
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# Move the cursor to the end of the file
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read_obj.seek(0, os.SEEK_END)
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# Get the current position of pointer i.e eof
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pointer_location = read_obj.tell()
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# Create a buffer to keep the last read line
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def __init__(self, file):
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self.file = file
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def readlines(self):
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BLKSIZE = 4096
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# Move reader to the end of file
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self.file.seek(0, os.SEEK_END)
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buffer = bytearray()
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# Loop till pointer reaches the top of the file
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while pointer_location >= 0:
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# Move the file pointer to the location pointed by pointer_location
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read_obj.seek(pointer_location)
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# Shift pointer location by -1
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pointer_location = pointer_location -1
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# read that byte / character
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new_byte = read_obj.read(1)
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# If the read byte is new line character then it means one line is read
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if new_byte == b'\n':
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# Fetch the line from buffer and yield it
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yield buffer.decode("latin-1")[::-1]
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# Reinitialize the byte array to save next line
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buffer = bytearray()
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while True:
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pos_newline = buffer.rfind(bytes([0x0a]))
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# Get the current position of the reader
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current_pos = self.file.tell()
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if pos_newline != -1:
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# Newline is found
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line = buffer[pos_newline+1:]
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buffer = buffer[:pos_newline]
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yield line.decode("latin-1")
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elif current_pos:
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# Need to fill the buffer
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to_read = min(BLKSIZE, current_pos)
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self.file.seek(current_pos-to_read, 0)
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buffer = self.file.read(to_read) + buffer
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self.file.seek(current_pos-to_read, 0)
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if current_pos is to_read:
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buffer = bytes([0x0a]) + buffer
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else:
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# If last read character is not eol then add it in buffer
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buffer.extend(new_byte)
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# As file is read completely, if there is still data in buffer, then its the first line.
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if len(buffer) > 0:
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# Yield the first line too
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yield buffer.decode("latin-1")[::-1]
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# Start of file
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return
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def trim_encrypt_string(encrypt):
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string_list = list(encrypt)
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strlen = len(encrypt)
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i = 0
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bracket_count = 0
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while (i < strlen):
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if string_list[i] == "<" and string_list[i+1] == "<":
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bracket_count += 1
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if string_list[i] == ">" and string_list[i+1] == ">":
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bracket_count -= 1
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if bracket_count == 0:
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break
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i = i + 1
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len_to_use = i+2
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return encrypt[0:len_to_use]
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def cleanup_encrypt_element(element):
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if element.startswith("ID[<"):
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element = element.replace("><", "> <")
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element = ' '.join(element.split())
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element = element.replace("[ ", "[").replace("] ", "]")
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return element
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def deflate_and_base64_encode( string_val ):
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zlibbed_str = zlib.compress( string_val )
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compressed_string = zlibbed_str[2:-4]
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return base64.b64encode( compressed_string )
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def prepare_string_from_xml(xmlstring, title, author):
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b64data = deflate_and_base64_encode(xmlstring.encode("utf-8")).decode("utf-8")
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def update_ebx_with_keys(ebx_data, adept_license, ebx_bookid):
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adobe_fulfill_response = etree.fromstring(xmlstring)
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NSMAP = { "adept" : "http://ns.adobe.com/adept" }
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adNS = lambda tag: '{%s}%s' % ('http://ns.adobe.com/adept', tag)
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resource = adobe_fulfill_response.find("./%s/%s" % (adNS("licenseToken"), adNS("resource"))).text
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b64data = deflate_and_base64_encode(adept_license.encode("utf-8")).decode("utf-8")
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return "<</Length 128/EBX_TITLE(%s)/Filter/EBX_HANDLER/EBX_AUTHOR(%s)/V 4/ADEPT_ID(%s)/EBX_BOOKID(%s)/ADEPT_LICENSE(%s)>>" % (title, author, resource, resource, b64data)
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ebx_new = ebx_data[:-2]
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ebx_new += "/EBX_BOOKID(%s)/ADEPT_LICENSE(%s)>>" % (ebx_bookid, b64data)
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def patch_drm_into_pdf(filename_in, drm_string, filename_out):
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return ebx_new
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ORIG_FILE = filename_in
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def find_ebx(filename_in):
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find_ebx_start = int(time.time() * 1000)
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i = 0
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fl = open(filename_in, "rb")
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br = BackwardReader(fl)
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for line in br.readlines():
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i = i + 1
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if "/EBX_HANDLER/" in line:
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find_ebx_end = int(time.time() * 1000)
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print("Found EBX after %d attempts - took %d ms" % (i, find_ebx_end - find_ebx_start))
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return line
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find_ebx_end = int(time.time() * 1000)
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print("Error: Did not find EBX_HANDLER - took %d ms" % (find_ebx_end - find_ebx_start))
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||||
return None
|
||||
|
||||
def find_enc(filename_in):
|
||||
find_enc_start = int(time.time() * 1000)
|
||||
i = 0
|
||||
|
||||
fl = open(filename_in, "rb")
|
||||
br = BackwardReader(fl)
|
||||
|
||||
for line in br.readlines():
|
||||
i = i + 1
|
||||
if "R/Encrypt" in line and "R/ID" in line:
|
||||
find_enc_end = int(time.time() * 1000)
|
||||
print("Found ENC after %d attempts - took %d ms" % (i, find_enc_end - find_enc_start))
|
||||
return line
|
||||
|
||||
find_enc_end = int(time.time() * 1000)
|
||||
print("Error: Did not find ENC - took %d ms" % (find_enc_end - find_enc_start))
|
||||
return None
|
||||
|
||||
|
||||
|
||||
def patch_drm_into_pdf(filename_in, adept_license_string, filename_out, ebx_bookid):
|
||||
|
||||
drm_start_time = int(time.time() * 1000)
|
||||
|
||||
trailer = ""
|
||||
trailer_idx = 0
|
||||
|
||||
print("DRM data is %s" % (drm_string))
|
||||
startxref_offset = 0
|
||||
prevline = ""
|
||||
|
||||
for line in read_reverse_order(ORIG_FILE):
|
||||
|
||||
fl = open(filename_in, "rb")
|
||||
br = BackwardReader(fl)
|
||||
|
||||
print("Searching for startxref ...")
|
||||
for line in br.readlines():
|
||||
trailer_idx += 1
|
||||
trailer = line + "\n" + trailer
|
||||
print("DEBUG: pdfdata[%d] = %s" % (trailer_idx, line))
|
||||
if (trailer_idx == 20):
|
||||
print("trailer_idx is very large (%d). Usually it's 10 or less. File might be corrupted." % trailer_idx)
|
||||
if (line == "trailer"):
|
||||
print("Found trailer at idx %d" % (trailer_idx))
|
||||
|
||||
print ("LINE: " + line)
|
||||
|
||||
if (trailer_idx > 10):
|
||||
print("Took more than 10 attempts to find startxref ...")
|
||||
return False
|
||||
|
||||
if (line == "startxref"):
|
||||
startxref_offset = int(prevline)
|
||||
print("Got startxref: %d" % (startxref_offset))
|
||||
break
|
||||
prevline = line
|
||||
|
||||
|
||||
|
||||
r_encrypt_offs1 = 0
|
||||
r_encrypt_offs2 = 0
|
||||
root_str = None
|
||||
next_startxref = False
|
||||
startxref = None
|
||||
|
||||
for line in trailer.split('\n'):
|
||||
#print(line)
|
||||
if ("R/Encrypt" in line):
|
||||
root_str = line
|
||||
line_split = line.split(' ')
|
||||
encrypt = None
|
||||
|
||||
|
||||
encrypt = find_enc(filename_in)
|
||||
if encrypt is None:
|
||||
print("Error, enc not found")
|
||||
return False
|
||||
|
||||
line_split = encrypt.split(' ')
|
||||
next = 0
|
||||
for element in line_split:
|
||||
if element == "R/Encrypt":
|
||||
next = 2
|
||||
continue
|
||||
if next == 2:
|
||||
r_encrypt_offs1 = element
|
||||
next = 1
|
||||
continue
|
||||
if next == 1:
|
||||
r_encrypt_offs2 = element
|
||||
next = 0
|
||||
for element in line_split:
|
||||
if element == "R/Encrypt":
|
||||
next = 2
|
||||
continue
|
||||
if next == 2:
|
||||
r_encrypt_offs1 = element
|
||||
next = 1
|
||||
continue
|
||||
if next == 1:
|
||||
r_encrypt_offs2 = element
|
||||
next = 0
|
||||
continue
|
||||
if "startxref" in line:
|
||||
next_startxref = True
|
||||
continue
|
||||
if next_startxref:
|
||||
startxref = line
|
||||
next_startxref = False
|
||||
continue
|
||||
|
||||
|
||||
# read EBX element:
|
||||
ebx_elem = find_ebx(filename_in)
|
||||
|
||||
if (ebx_elem is None):
|
||||
print("Err: EBX is None")
|
||||
return False
|
||||
|
||||
|
||||
print("")
|
||||
print("")
|
||||
print("Encryption handler:")
|
||||
print(encrypt)
|
||||
print("EBX handler:")
|
||||
print(ebx_elem)
|
||||
|
||||
encrypt = trim_encrypt_string(encrypt)
|
||||
|
||||
print("Trimmed encryption handler:")
|
||||
print(encrypt)
|
||||
|
||||
ebx_elem = update_ebx_with_keys(ebx_elem, adept_license_string, ebx_bookid)
|
||||
|
||||
print("Updated EBX handler not logged due to sensitive data")
|
||||
#print(ebx_elem)
|
||||
|
||||
|
||||
filesize_str = str(os.path.getsize(ORIG_FILE))
|
||||
filesize_str = str(os.path.getsize(filename_in))
|
||||
filesize_pad = filesize_str.zfill(10)
|
||||
|
||||
|
||||
additional_data = "\r"
|
||||
additional_data += r_encrypt_offs1 + " " + r_encrypt_offs2 + " " + "obj" + "\r"
|
||||
additional_data += drm_string
|
||||
additional_data += ebx_elem
|
||||
additional_data += "\r"
|
||||
additional_data += "endobj"
|
||||
|
||||
|
|
@ -117,36 +226,40 @@ def patch_drm_into_pdf(filename_in, drm_string, filename_out):
|
|||
additional_data += "trailer"
|
||||
additional_data += "\r"
|
||||
|
||||
arr_root_str = root_str.split('/')
|
||||
arr_root_str = encrypt.split('/')
|
||||
did_prev = False
|
||||
for elem in arr_root_str:
|
||||
if elem.startswith("Prev"):
|
||||
did_prev = True
|
||||
additional_data += "Prev " + startxref
|
||||
additional_data += "Prev " + str(startxref_offset)
|
||||
#print("Replacing prev from '%s' to '%s'" % (elem, "Prev " + startxref))
|
||||
elif elem.startswith("ID[<"):
|
||||
additional_data += elem.replace("><", "> <")
|
||||
else:
|
||||
additional_data += elem
|
||||
additional_data += cleanup_encrypt_element(elem)
|
||||
additional_data += "/"
|
||||
|
||||
if not did_prev:
|
||||
# remove two >> at end
|
||||
additional_data = additional_data[:-3]
|
||||
additional_data += "/Prev " + startxref + ">>" + "/"
|
||||
additional_data += "/Prev " + str(startxref_offset) + ">>" + "/"
|
||||
#print("Faking Prev %s" % startxref)
|
||||
|
||||
additional_data = additional_data[:-1]
|
||||
|
||||
additional_data += "\r" + "startxref\r" + str(ptr) + "\r" + "%%EOF"
|
||||
|
||||
print("Appending DRM data: %s" % (additional_data))
|
||||
#print("Appending DRM data: %s" % (additional_data))
|
||||
|
||||
|
||||
inp = open(ORIG_FILE, "rb")
|
||||
inp = open(filename_in, "rb")
|
||||
|
||||
out = open(filename_out, "wb")
|
||||
out.write(inp.read())
|
||||
out.write(additional_data.encode("latin-1"))
|
||||
inp.close()
|
||||
out.close()
|
||||
|
||||
drm_end_time = int(time.time() * 1000)
|
||||
|
||||
print("Whole DRM patching took %d milliseconds." % (drm_end_time - drm_start_time))
|
||||
|
||||
return True
|
||||
Loading…
Reference in New Issue