def makepdf(self, pdfdata1, udct, zeros, sig_attributes):
parser = PDFParser(BytesIO(pdfdata1))
document = PDFDocument(parser, fallback=False)
log.info('get datas from pdf')
prev = document.find_xref(parser)
info = document.xrefs[0].trailer['Info'].objid
root = document.xrefs[0].trailer['Root'].objid
size = document.xrefs[0].trailer['Size']
page_objid = document.catalog['Pages'].objid
page = None
log.info('check sig attributes...')
position = MyConfigLoader().get_pdf_config()['position']
if not sig_attributes:
visibility = MyConfigLoader().get_pdf_config()['visibility']
else:
visibility = sig_attributes['visibility']
log.info(f'the sign is {visibility}')
if visibility == 'visible':
position = sig_attributes['position']
log.info(f'position: {position}')
page_pos = position['page']
if page_pos == 'n':
try:
pages_count = document.getobj(page_objid)['Count']
page = document.getobj(page_objid)['Kids'][pages_count - 1].objid
except Exception:
page = int(1)
else:
try:
page = document.getobj(page_objid)['Kids'][int(page_pos) - 1].objid
except Exception:
log.error('page not found...take the first')
page = document.getobj(page_objid)['Kids'][0].objid
infodata = self.getdata(pdfdata1, info, prev, document).strip()
rootdata = self.getdata(pdfdata1, root, prev, document).strip()
pagedata = self.getdata(pdfdata1, page, prev, document).strip()
no = size
multiple_signs = False
signatures = self.get_signature_names(document)
if len(signatures) > 0:
multiple_signs = True
if visibility == 'visible':
rect_array = self.get_rect_array(pagedata, position)
stream_name = compress(STREAM_WITH_NAME % udct[b'name'])
if multiple_signs:
objs = self.make_multi_visible_sig_objs(document, udct, no, page, pagedata, infodata, rootdata, stream_name, rect_array, zeros)
xref = self.make_multi_visible_xref()
new_size = 11
else:
objs = self.make_visible_sig_objs(udct, no, page, pagedata, infodata, rootdata, stream_name, rect_array, zeros)
xref = self.make_visible_xref()
new_size = 13
else:
if multiple_signs:
objs = self.make_multi_inv_sig_objs(document, udct, no, page, pagedata, infodata, rootdata, zeros, len(signatures) + 1)
xref = self.make_multi_inv_xref()
new_size = 5
else:
objs = self.make_invisible_sig_objs(udct, no, page, pagedata, infodata, rootdata, zeros)
xref = self.make_multi_inv_xref()
new_size = 5
pdfdata2 = b''.join(objs)
startxref = len(pdfdata1)
dct = {
b'page': page,
b'no': no,
b'startxref': startxref + len(pdfdata2),
b'prev': prev,
b'info': no + 0,
b'root': no + 1,
b'size': no + new_size,
b'p0': startxref + pdfdata2.find(b'\n%d 0 obj\n' % page) + 1,
b'h1': hashlib.md5(pdfdata1).hexdigest().upper().encode('ascii'),
b'h2': hashlib.md5(pdfdata2).hexdigest().upper().encode('ascii'),
}
for i in range(new_size):
dct.update(({b'n%d' % i: startxref + pdfdata2.find(b'\n%d 0 obj\n' % (no + i)) + 1, }))
trailer = b'''\
trailer
<</ID [<%(h1)s><%(h2)s>]/Info %(info)d 0 R/Prev %(prev)d/Root %(root)d 0 R/Size %(size)d>>\n\
startxref\n\
%(startxref)d\n\
%%%%EOF\n\
'''
xref = xref % dct
trailer = trailer % dct
pdfdata2 = pdfdata2 + xref + trailer
return pdfdata2
def makepdf(self, pdfdata1, udct, zeros):
parser = PDFParser(BytesIO(pdfdata1))
document = PDFDocument(parser, fallback=False)
prev = document.find_xref(parser)
info = document.xrefs[0].trailer['Info'].objid
root = document.xrefs[0].trailer['Root'].objid
size = 1
# calculate last object id, size is only xref size but not count of object in xref
for ref in document.xrefs:
if isinstance(ref, PDFXRefStream):
no = max(ref.ranges, key=operator.itemgetter(1))[1]
else:
if len(ref.offsets) == 0:
no = 0
else:
no = max(ref.offsets.keys())
size = max(size, no)
page = document.getobj(
document.catalog['Pages'].objid)['Kids'][0].objid
nsig, fields = self.getfields(root, document)
annots = self.getannots(page, document)
infodata = self.getdata(pdfdata1, info, prev, document)
rootdata = self.getdata(pdfdata1, root, prev, document, ('AcroForm', ))
pagedata = self.getdata(pdfdata1, page, prev, document, ('Annots', ))
annotation = udct.get(b'signature', b'').decode('utf8')
x1, y1, x2, y2 = udct.get(b'signaturebox', (0, 0, 0, 0))
annotation = FreeText(
Location(x1=x1, y1=y1, x2=x2, y2=y2, page=0),
Appearance(
fill=[0, 0, 0],
stroke_width=1,
wrap_text=True,
font_size=12,
content=annotation,
),
)
pdfa = annotation.as_pdf_object(identity(), page=None)
pdfar = b'[%d %d %d %d]' % tuple(pdfa.Rect)
pdfas = pdfa.AP.N.stream.encode('latin1')
no = size + 1
objs = [
self.makeobj(page,
(b'/Annots[%s%d 0 R]' % (annots, no + 3) + pagedata)),
self.makeobj(no + 0, infodata),
self.makeobj(no + 1, (b'/AcroForm %d 0 R' % (no + 2)) + rootdata),
self.makeobj(
no + 2, b'/Fields[%s%d 0 R]/SigFlags %d' %
(fields, no + 3, udct[b'sigflags'])),
self.makeobj(
no + 3, b'''
/Type
/Annot
/Subtype
/FreeText
/AP <</N %d 0 R>>
/BS <</S /S /Type /Border /W 0>>
/C []
/Contents (%s)
/DA (0 0 0 rg /%s 12 Tf)
/Rect %s
/F 704
/P %d 0 R
/FT
/Sig
/T(Signature%d)
/V %d 0 R
''' % (no + 4, pdfa.Contents.encode('latin1'),
pdfa.AP.N.Resources.Font.keys()[0].encode('latin1'), pdfar, page, nsig,
no + 5)),
self.makeobj(
no + 4, b'''
/BBox %s
/FormType 1
/Length %d
/Matrix [1 0 0 1 0 0]
/Resources <</Font <<%s <</BaseFont /Helvetica /Encoding /WinAnsiEncoding /Subtype /Type1 /Type /Font>>>> /ProcSet /PDF>>
/Subtype
/Form
/Type
/XObject
''' % (
pdfar,
len(pdfas),
pdfa.AP.N.Resources.Font.keys()[0].encode('latin1'),
), b'stream\n' + pdfas + b'\nendstream\n'),
self.makeobj(no + 5, (
b'/ByteRange [0000000000 0000000000 0000000000 0000000000]/ContactInfo(%s)\
/Filter/Adobe.PPKLite/Location(%s)/M(D:%s)/Prop_Build<</App<</Name/>>>>/Reason(%s)/SubFilter/adbe.pkcs7.detached/Type/Sig\
/Contents <' % (udct[b'contact'], udct[b'location'], udct[b'signingdate'],
udct[b'reason'])) + zeros + b'>'),
]
pdfdata2 = b''.join(objs)
xref = b'''\
xref\n\
%(page)d 1\n\
%(p0)010d 00000 n \n\
%(no)d 6\n\
%(n0)010d 00000 n \n\
%(n1)010d 00000 n \n\
%(n2)010d 00000 n \n\
%(n3)010d 00000 n \n\
%(n4)010d 00000 n \n\
%(n5)010d 00000 n \n\
'''
startxref = len(pdfdata1)
dct = {
b'page': page,
b'no': no,
b'startxref': startxref + len(pdfdata2),
b'prev': prev,
b'info': no + 0,
b'root': no + 1,
b'size': 6,
b'p0': startxref + pdfdata2.find(b'\n%d 0 obj\n' % page) + 1,
b'n0': startxref + pdfdata2.find(b'\n%d 0 obj\n' % (no + 0)) + 1,
b'n1': startxref + pdfdata2.find(b'\n%d 0 obj\n' % (no + 1)) + 1,
b'n2': startxref + pdfdata2.find(b'\n%d 0 obj\n' % (no + 2)) + 1,
b'n3': startxref + pdfdata2.find(b'\n%d 0 obj\n' % (no + 3)) + 1,
b'n4': startxref + pdfdata2.find(b'\n%d 0 obj\n' % (no + 4)) + 1,
b'n5': startxref + pdfdata2.find(b'\n%d 0 obj\n' % (no + 5)) + 1,
b'h1': hashlib.md5(pdfdata1).hexdigest().upper().encode('ascii'),
b'h2': hashlib.md5(pdfdata2).hexdigest().upper().encode('ascii'),
}
trailer = b'''\
trailer
<</ID [<%(h1)s><%(h2)s>]/Info %(info)d 0 R/Prev %(prev)d/Root %(root)d 0 R/Size %(size)d>>\n\
startxref\n\
%(startxref)d\n\
%%%%EOF\n\
'''
xref = xref % dct
trailer = trailer % dct
pdfdata2 = pdfdata2 + xref + trailer
return pdfdata2
def makepdf(self, pdfdata1, udct, zeros):
parser = PDFParser(BytesIO(pdfdata1))
document = PDFDocument(parser, fallback=False)
prev = document.find_xref(parser)
info = document.xrefs[0].trailer['Info'].objid
root = document.xrefs[0].trailer['Root'].objid
size = 1
# calculate last object id, size is only xref size but not count of object in xref
for ref in document.xrefs:
if isinstance(ref, PDFXRefStream):
no = max(ref.ranges, key=operator.itemgetter(1))[1]
else:
if len(ref.offsets) == 0:
no = 0
else:
no = max(ref.offsets.keys())
size = max(size, no)
page = document.getobj(
document.catalog['Pages'].objid)['Kids'][0].objid
nsig, fields = self.getfields(root, document)
annots = self.getannots(page, document)
infodata = self.getdata(pdfdata1, info, prev, document)
rootdata = self.getdata(pdfdata1, root, prev, document, ('AcroForm', ))
pagedata = self.getdata(pdfdata1, page, prev, document, ('Annots', ))
rectPos = b'0 0 0 0'
if b'rectPos' in udct:
rectPos = udct[b'rectPos']
no = size + 1
objs = [
self.makeobj(page,
(b'/Annots[%s%d 0 R]' % (annots, no + 3) + pagedata)),
self.makeobj(no + 0, infodata),
self.makeobj(no + 1, (b'/AcroForm %d 0 R' % (no + 2)) + rootdata),
self.makeobj(
no + 2, b'/Fields[%s%d 0 R]/SigFlags %d' %
(fields, no + 3, udct[b'sigflags'])),
self.makeobj(
no + 3,
b'/AP<</N %d 0 R>>/F 132/FT/Sig/P %d 0 R/Rect[%s]/Subtype/Widget/T(Signature%d)/V %d 0 R'
% (no + 4, page, rectPos, nsig, no + 5)),
self.makeobj(
no + 4,
b'/BBox[0 0 0 0]/Filter/FlateDecode/Length 8/Subtype/Form/Type/XObject',
b'stream\n\x78\x9C\x03\x00\x00\x00\x00\x01\nendstream\n'),
self.makeobj(no + 5, (
b'/ByteRange [0000000000 0000000000 0000000000 0000000000]/ContactInfo(%s)\
/Filter/Adobe.PPKLite/Location(%s)/M(D:%s)/Prop_Build<</App<</Name/>>>>/Reason(%s)/SubFilter/adbe.pkcs7.detached/Type/Sig\
/Contents <' % (udct[b'contact'], udct[b'location'], udct[b'signingdate'],
udct[b'reason'])) + zeros + b'>'),
]
pdfdata2 = b''.join(objs)
xref = b'''\
xref\n\
%(page)d 1\n\
%(p0)010d 00000 n \n\
%(no)d 6\n\
%(n0)010d 00000 n \n\
%(n1)010d 00000 n \n\
%(n2)010d 00000 n \n\
%(n3)010d 00000 n \n\
%(n4)010d 00000 n \n\
%(n5)010d 00000 n \n\
'''
startxref = len(pdfdata1)
dct = {
b'page': page,
b'no': no,
b'startxref': startxref + len(pdfdata2),
b'prev': prev,
b'info': no + 0,
b'root': no + 1,
b'size': 6,
b'p0': startxref + pdfdata2.find(b'\n%d 0 obj\n' % page) + 1,
b'n0': startxref + pdfdata2.find(b'\n%d 0 obj\n' % (no + 0)) + 1,
b'n1': startxref + pdfdata2.find(b'\n%d 0 obj\n' % (no + 1)) + 1,
b'n2': startxref + pdfdata2.find(b'\n%d 0 obj\n' % (no + 2)) + 1,
b'n3': startxref + pdfdata2.find(b'\n%d 0 obj\n' % (no + 3)) + 1,
b'n4': startxref + pdfdata2.find(b'\n%d 0 obj\n' % (no + 4)) + 1,
b'n5': startxref + pdfdata2.find(b'\n%d 0 obj\n' % (no + 5)) + 1,
b'h1': hashlib.md5(pdfdata1).hexdigest().upper().encode('ascii'),
b'h2': hashlib.md5(pdfdata2).hexdigest().upper().encode('ascii'),
}
trailer = b'''\
trailer
<</ID [<%(h1)s><%(h2)s>]/Info %(info)d 0 R/Prev %(prev)d/Root %(root)d 0 R/Size %(size)d>>\n\
startxref\n\
%(startxref)d\n\
%%%%EOF\n\
'''
xref = xref % dct
trailer = trailer % dct
pdfdata2 = pdfdata2 + xref + trailer
return pdfdata2
def makepdf(self, pdfdata1, udct, zeros):
parser = PDFParser(BytesIO(pdfdata1))
document = PDFDocument(parser, fallback=False)
prev = document.find_xref(parser)
info = document.xrefs[0].trailer['Info'].objid
root = document.xrefs[0].trailer['Root'].objid
size = 1
# calculate last object id, size is only xref size but not count of object in xref
for ref in document.xrefs:
if isinstance(ref, PDFXRefStream):
no = max(ref.ranges, key=operator.itemgetter(1))[1]
else:
if len(ref.offsets) == 0:
no = 0
else:
no = max(ref.offsets.keys())
size = max(size, no)
pages = len(document.getobj(document.catalog['Pages'].objid)['Kids'])
page = udct.get(b'sigpage',
0) if 0 <= udct.get(b'sigpage', 0) <= pages - 1 else 0
page = document.getobj(
document.catalog['Pages'].objid)['Kids'][page].objid
nsig, fields = self.getfields(root, document)
annots = self.getannots(page, document)
infodata = self.getdata(pdfdata1, info, prev, document)
rootdata = self.getdata(pdfdata1, root, prev, document, ('AcroForm', ))
pagedata = self.getdata(pdfdata1, page, prev, document, ('Annots', ))
no = size + 1
visualization, nav = self.makevisualization(no, udct, nsig, page)
objs = [
self.makeobj(page,
(b'/Annots[%s%d 0 R]' % (annots, no + 3) + pagedata)),
self.makeobj(no + 0, infodata),
self.makeobj(no + 1, (b'/AcroForm %d 0 R' % (no + 2)) + rootdata),
self.makeobj(
no + 2, b'/Fields[%s%d 0 R]/SigFlags %d' %
(fields, no + 3, udct[b'sigflags'])),
visualization,
self.makeobj(nav + 1, (
b'/ByteRange [0000000000 0000000000 0000000000 0000000000]/ContactInfo(%s)\
/Filter/Adobe.PPKLite/Location(%s)/M(D:%s)/Prop_Build<</App<</Name/>>>>/Reason(%s)/SubFilter/adbe.pkcs7.detached/Type/Sig\
/Contents <' % (udct[b'contact'], udct[b'location'], udct[b'signingdate'],
udct[b'reason'])) + zeros + b'>'),
# self.makeobj(nav + 1, (b'/ByteRange [0000000000 0000000000 0000000000 0000000000]/ContactInfo(%s)\
#/Filter/Adobe.PPKMS/SubFilter/ETSI.CAdES.detached/Location(%s)/M(D:%s)/Prop_Build<</App<</Name/>>>>/Reason(%s)/SubFilter/adbe.pkcs7.detached/Type/Sig\
#/Contents <' % (udct[b'contact'], udct[b'location'], udct[b'signingdate'], udct[b'reason'])) + zeros + b'>'),
]
size = nav - no + 2
pdfdata2 = b''.join(objs)
startxref = len(pdfdata1)
xref = b'xref\n%d 1\n%010d 00000 n \n%d %d\n' % (
page, startxref + pdfdata2.find(b'\n%d 0 obj\n' % page) + 1, no,
size)
xref += b''.join([
b'%010d 00000 n \n' % (startxref + pdfdata2.find(b'\n%d 0 obj\n' %
(no + i)) + 1)
for i in range(size)
])
trailer = b'''\
trailer
<</ID [<%(h1)s><%(h2)s>]/Info %(info)d 0 R/Prev %(prev)d/Root %(root)d 0 R/Size %(size)d>>\n\
startxref\n\
%(startxref)d\n\
%%%%EOF\n\
'''
trailer = trailer % {
b'page': page,
b'no': no,
b'startxref': startxref + len(pdfdata2),
b'prev': prev,
b'info': no + 0,
b'root': no + 1,
b'size': size,
b'h1': hashlib.md5(pdfdata1).hexdigest().upper().encode('ascii'),
b'h2': hashlib.md5(pdfdata2).hexdigest().upper().encode('ascii'),
}
pdfdata2 = pdfdata2 + xref + trailer
return pdfdata2
def makepdf(self, pdfdata1, udct, zeros):
parser = PDFParser(BytesIO(pdfdata1))
document = PDFDocument(parser, fallback=False)
prev = document.find_xref(parser)
info = document.xrefs[0].trailer['Info'].objid
root = document.xrefs[0].trailer['Root'].objid
size = document.xrefs[0].trailer['Size']
page = document.getobj(
document.catalog['Pages'].objid)['Kids'][0].objid
infodata = self.getdata(pdfdata1, info, prev, document).strip()
rootdata = self.getdata(pdfdata1, root, prev, document).strip()
pagedata = self.getdata(pdfdata1, page, prev, document).strip()
no = size
objs = [
self.makeobj(page, (b'/Annots[%d 0 R]' % (no + 3)) + pagedata),
self.makeobj(no + 0, infodata),
self.makeobj(no + 1, (b'/AcroForm %d 0 R' % (no + 2)) + rootdata),
self.makeobj(
no + 2,
b'/Fields[%d 0 R]/SigFlags %d' % (no + 3, udct[b'sigflags'])),
self.makeobj(
no + 3,
b'/AP<</N %d 0 R>>/F 132/FT/Sig/P %d 0 R/Rect[0 0 0 0]/Subtype/Widget/T(Signature1)/V %d 0 R'
% (no + 4, page, no + 5)),
self.makeobj(
no + 4,
b'/BBox[0 0 0 0]/Filter/FlateDecode/Length 8/Subtype/Form/Type/XObject',
b'stream\n\x78\x9C\x03\x00\x00\x00\x00\x01\nendstream\n'),
self.makeobj(no + 5, (
b'/ByteRange [0000000000 0000000000 0000000000 0000000000]/ContactInfo(%s)\
/Filter/Adobe.PPKLite/Location(%s)/M(D:%s)/Prop_Build<</App<</Name/>>>>/Reason(%s)/SubFilter/adbe.pkcs7.detached/Type/Sig\
/Contents <' % (udct[b'contact'], udct[b'location'], udct[b'signingdate'],
udct[b'reason'])) + zeros + b'>'),
]
pdfdata2 = b''.join(objs)
xref = b'''\
xref\n\
%(page)d 1\n\
%(p0)010d 00000 n \n\
%(no)d 6\n\
%(n0)010d 00000 n \n\
%(n1)010d 00000 n \n\
%(n2)010d 00000 n \n\
%(n3)010d 00000 n \n\
%(n4)010d 00000 n \n\
%(n5)010d 00000 n \n\
'''
startxref = len(pdfdata1)
dct = {
b'page': page,
b'no': no,
b'startxref': startxref + len(pdfdata2),
b'prev': prev,
b'info': no + 0,
b'root': no + 1,
b'size': 6,
b'p0': startxref + pdfdata2.find(b'\n%d 0 obj\n' % page) + 1,
b'n0': startxref + pdfdata2.find(b'\n%d 0 obj\n' % (no + 0)) + 1,
b'n1': startxref + pdfdata2.find(b'\n%d 0 obj\n' % (no + 1)) + 1,
b'n2': startxref + pdfdata2.find(b'\n%d 0 obj\n' % (no + 2)) + 1,
b'n3': startxref + pdfdata2.find(b'\n%d 0 obj\n' % (no + 3)) + 1,
b'n4': startxref + pdfdata2.find(b'\n%d 0 obj\n' % (no + 4)) + 1,
b'n5': startxref + pdfdata2.find(b'\n%d 0 obj\n' % (no + 5)) + 1,
b'h1': hashlib.md5(pdfdata1).hexdigest().upper().encode('ascii'),
b'h2': hashlib.md5(pdfdata2).hexdigest().upper().encode('ascii'),
}
trailer = b'''\
trailer
<</ID [<%(h1)s><%(h2)s>]/Info %(info)d 0 R/Prev %(prev)d/Root %(root)d 0 R/Size %(size)d>>\n\
startxref\n\
%(startxref)d\n\
%%%%EOF\n\
'''
xref = xref % dct
trailer = trailer % dct
pdfdata2 = pdfdata2 + xref + trailer
return pdfdata2
