def _make_sig_annotation(self, F=None, Vref=None, T=None, Pref=None):
annot = po.DictionaryObject()
annot_ref = self._addObject(annot)
annot.update({
po.NameObject("/FT"):
po.NameObject("/Sig"),
po.NameObject("/Type"):
po.NameObject("/Annot"),
po.NameObject("/Subtype"):
po.NameObject("/Widget"),
po.NameObject("/F"):
F,
po.NameObject("/T"):
T,
po.NameObject("/V"):
Vref,
po.NameObject("/P"):
Pref,
# For an invisible signature, /Rect should be a size 0 box
# Defaulting to that
po.NameObject("/Rect"):
po.ArrayObject([
po.FloatObject(0.0),
po.FloatObject(0.0),
po.FloatObject(0.0),
po.FloatObject(0.0),
]),
})
return annot, annot_ref
def makepdf(self, prev, udct, algomd, zeros):
catalog = prev.trailer["/Root"]
size = prev.trailer["/Size"]
pages = catalog["/Pages"].getObject()
page0ref = pages["/Kids"][udct.get("sigpage", 0)]
while len(self._objects) < size - 1:
self._objects.append(None)
obj13 = po.DictionaryObject()
obj13ref = self._addObject(obj13)
obj12 = po.DictionaryObject()
obj12ref = self._addObject(obj12)
obj12.update({
po.NameObject("/Type"):
po.NameObject("/Sig"),
po.NameObject("/Filter"):
po.NameObject("/Adobe.PPKLite"),
po.NameObject("/SubFilter"):
po.NameObject("/adbe.pkcs7.detached"),
po.NameObject("/Name"):
po.createStringObject(udct["contact"]),
po.NameObject("/Location"):
po.createStringObject(udct["location"]),
po.NameObject("/Reason"):
po.createStringObject(udct["reason"]),
po.NameObject("/M"):
po.createStringObject(udct["signingdate"]),
po.NameObject("/Contents"):
UnencryptedBytes(zeros),
po.NameObject("/ByteRange"):
po.ArrayObject([
WNumberObject(0),
WNumberObject(0),
WNumberObject(0),
WNumberObject(0),
]),
})
obj13.update({
po.NameObject("/FT"):
po.NameObject("/Sig"),
po.NameObject("/Type"):
po.NameObject("/Annot"),
po.NameObject("/Subtype"):
po.NameObject("/Widget"),
po.NameObject("/F"):
po.NumberObject(udct.get("sigflagsft", 132)),
po.NameObject("/T"):
EncodedString(udct.get("sigfield", "Signature1")),
po.NameObject("/V"):
obj12ref,
po.NameObject("/P"):
page0ref,
po.NameObject("/Rect"):
po.ArrayObject([
po.FloatObject(0.0),
po.FloatObject(0.0),
po.FloatObject(0.0),
po.FloatObject(0.0),
]),
})
box = udct.get("signaturebox", None)
if box is not None:
from endesive.pdf.PyPDF2_annotate.annotations.text import FreeText
from endesive.pdf.PyPDF2_annotate.annotations.image import Image
from endesive.pdf.PyPDF2_annotate.config.appearance import Appearance
from endesive.pdf.PyPDF2_annotate.config.location import Location
from endesive.pdf.PyPDF2_annotate.util.geometry import identity
annotationtext = udct.get("signature", None)
x1, y1, x2, y2 = box
if annotationtext is not None:
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=annotationtext,
),
)
names = ("BS", "C", "Contents", "DA")
if not udct.get("sigbutton", False):
obj13[po.NameObject("/Subtype")] = po.NameObject(
"/FreeText")
else:
ap = Appearance()
ap.image = udct["signature_img"]
annotation = Image(
Location(x1=x1, y1=y1, x2=x2, y2=y2, page=0), ap)
if not udct.get("sigbutton", False):
names = (
#
"Subtype", )
else:
names = ()
pdfa = annotation.as_pdf_object(identity(), page=page0ref)
objapn = self._extend(pdfa["/AP"]["/N"])
objapnref = self._addObject(objapn)
for name in names + (
"Rect",
# "Subtype",
):
key = po.NameObject("/" + name)
v = pdfa[key]
obj13[key] = v
objap = po.DictionaryObject()
objap[po.NameObject("/N")] = objapnref
obj13.update({
po.NameObject("/AP"):
objap,
po.NameObject("/SM"):
po.createStringObject("TabletPOSinline"),
})
page0 = page0ref.getObject()
annots = po.ArrayObject([obj13ref])
if "/Annots" in page0:
page0annots = page0["/Annots"]
if isinstance(page0annots, po.IndirectObject):
annots.insert(0, page0annots)
elif isinstance(page0annots, po.ArrayObject):
annots = page0annots
annots.append(obj13ref)
page0.update({po.NameObject("/Annots"): annots})
self._objects[page0ref.idnum - 1] = page0
if "/Perms" not in catalog:
obj10 = po.DictionaryObject()
obj10ref = self._addObject(obj10)
obj11 = po.DictionaryObject()
obj11ref = self._addObject(obj11)
obj14 = po.DictionaryObject()
obj14ref = self._addObject(obj14)
obj14.update({po.NameObject("/DocMDP"): obj12ref})
obj10.update({
po.NameObject("/Type"):
po.NameObject("/TransformParams"),
po.NameObject("/P"):
po.NumberObject(2),
po.NameObject("/V"):
po.NameObject("/1.2"),
})
obj11.update({
po.NameObject("/Type"):
po.NameObject("/SigRef"),
po.NameObject("/TransformMethod"):
po.NameObject("/DocMDP"),
po.NameObject("/DigestMethod"):
po.NameObject("/" + algomd.upper()),
po.NameObject("/TransformParams"):
obj10ref,
})
obj12[po.NameObject("/Reference")] = po.ArrayObject([obj11ref])
catalog[po.NameObject("/Perms")] = obj14ref
if "/AcroForm" in catalog:
form = catalog["/AcroForm"].getObject()
if "/Fields" in form:
fields = form["/Fields"]
else:
fields = po.ArrayObject()
fields.append(obj13ref)
form.update({
po.NameObject("/Fields"):
fields,
po.NameObject("/SigFlags"):
po.NumberObject(udct.get("sigflags", 3)),
})
formref = catalog.raw_get("/AcroForm")
if isinstance(formref, po.IndirectObject):
self._objects[formref.idnum - 1] = form
form = formref
else:
form = po.DictionaryObject()
form.update({
po.NameObject("/Fields"):
po.ArrayObject([obj13ref]),
po.NameObject("/SigFlags"):
po.NumberObject(udct.get("sigflags", 3)),
})
catalog[po.NameObject("/AcroForm")] = form
if "/Metadata" in catalog:
catalog[po.NameObject("/Metadata")] = catalog.raw_get("/Metadata")
x_root = prev.trailer.raw_get("/Root")
self._objects[x_root.idnum - 1] = catalog
self.x_root = po.IndirectObject(x_root.idnum, 0, self)
self.x_info = prev.trailer.raw_get("/Info")
def makepdf(self, prev, udct, algomd, zeros, cert, **params):
catalog = prev.trailer["/Root"]
size = prev.trailer["/Size"]
pages = catalog["/Pages"].getObject()
page0ref = prev.getPage(udct.get("sigpage", 0)).indirectRef
self._objects = []
while len(self._objects) < size - 1:
self._objects.append(None)
## if params['mode'] == 'timestamp':
## # deal with extensions
## if '/Extensions' not in catalog:
## extensions = po.DictionaryObject()
## else:
## extensions = catalog['/Extensions']
##
## if '/ESIC' not in extensions:
## extensions.update({
## po.NameObject("/ESIC"): po.DictionaryObject({
## po.NameObject('/BaseVersion'): po.NameObject('/1.7'),
## po.NameObject('/ExtensionLevel'): po.NumberObject(1),
## })
## })
## else:
## esic = extensions['/ESIC']
## major, minor = esic['/BaseVersion'].lstrip('/').split('.')
## if int(major) < 1 or int(minor) < 7:
## esic.update({
## po.NameObject('/BaseVersion'): po.NameObject('/1.7'),
## po.NameObject('/ExtensionLevel'): po.NumberObject(1),
## })
## catalog.update({
## po.NameObject('/Extensions'): extensions
## })
# obj12 is the digital signature
obj12, obj12ref = self._make_signature(
Type=po.NameObject("/Sig"),
SubFilter=po.NameObject("/adbe.pkcs7.detached"),
Contents=UnencryptedBytes(zeros),
)
if params['mode'] == 'timestamp':
# obj12 is a timestamp this time
obj12.update({
po.NameObject("/Type"):
po.NameObject("/DocTimeStamp"),
po.NameObject("/SubFilter"):
po.NameObject("/ETSI.RFC3161"),
po.NameObject("/V"):
po.NumberObject(0),
})
else:
obj12.update({
po.NameObject("/Name"):
po.createStringObject(udct["contact"]),
po.NameObject("/Location"):
po.createStringObject(udct["location"]),
po.NameObject("/Reason"):
po.createStringObject(udct["reason"]),
})
if params.get('use_signingdate'):
obj12.update({
po.NameObject("/M"):
po.createStringObject(udct["signingdate"]),
})
# obj13 is a combined AcroForm Sig field with Widget annotation
new_13 = True
#obj13 = po.DictionaryObject()
if udct.get('signform', False):
# Attaching signature to existing field in AcroForm
if "/AcroForm" in catalog:
form = catalog["/AcroForm"].getObject()
if "/Fields" in form:
fields = form["/Fields"].getObject()
obj13ref = [
f for f in fields if f.getObject()['/T'] == udct.get(
'sigfield', 'Signature1')
][0]
obj13 = obj13ref.getObject()
self._objects[obj13ref.idnum - 1] = obj13
new_13 = False
# box is coordinates of the annotation to fill
box = udct.get("signaturebox", None)
if new_13:
obj13, obj13ref = self._make_sig_annotation(
F=po.NumberObject(udct.get("sigflagsft", 132)),
T=EncodedString(udct.get("sigfield", "Signature1")),
Vref=obj12ref,
Pref=page0ref,
)
else:
# original obj13 is a merged SigField/SigAnnot
# Setting /V on the AcroForm field sets the signature
# for the field
obj13.update({
po.NameObject("/V"): obj12ref,
})
# fill the existing signature field annotation,
# ignore any other location
if "/Rect" in obj13:
box = [float(f) for f in obj13["/Rect"]]
# add an annotation if there is a field to fill
if box is not None:
from endesive.pdf.PyPDF2_annotate.annotations.signature import Signature
from endesive.pdf.PyPDF2_annotate.config.appearance import Appearance
from endesive.pdf.PyPDF2_annotate.config.location import Location
from endesive.pdf.PyPDF2_annotate.util.geometry import identity
x1, y1, x2, y2 = box
annotation = Signature(
Location(x1=x1, y1=y1, x2=x2, y2=y2, page=0),
Appearance(),
)
if 'signature' in udct:
# Plain text signature with the default font
# text to render is contained in udct['signature']
# font parameters are in udct['signature']['text']
annotationtext = udct["signature"]
wrap_text = udct.get('text', {}).get('wraptext', True)
font_size = udct.get('text', {}).get('fontsize', 12)
text_align = udct.get('text', {}).get('textalign', 'left')
line_spacing = udct.get('text', {}).get('linespacing', 1.2)
annotation.add_default_font()
annotation.set_signature_appearance(
['fill_colour', 0, 0, 0], ['font', 'default', font_size], [
'text_box', annotationtext, 'default', 0, 0, x2 - x1,
y2 - y1, font_size, wrap_text, text_align, 'middle',
line_spacing
])
elif 'signature_img' in udct:
# Simple image signature, stretches to fit the box
# image to render is contained in udct['signature_image']
annotation.add_image(udct["signature_img"], "Image")
annotation.set_signature_appearance([
'image',
"Image",
0,
0,
x2 - x1,
y2 - y1,
udct.get('signature_img_distort', True),
udct.get('signature_img_centred', False),
])
elif 'signature_appearance' in udct:
# Adobe-inspired signature with text and images
# Parameters are contained in udct['signature_appearance']
# If a field is included in the display list, that field
# will be contained in the annotation.
#
# Text and border are the colour specified by outline,
# and border is the the inset distance from the outer
# edge of the annotation. The R G B values range between
# 0 and 1.
#
# Icon is an image to display above the background and
# border at the left-hand side of the anntoation. If
# there is no text, it is centred.
#
# The text block is left-aligned to the right of the icon
# image. If there is no image, the text is left-aliged
# with the left-hand border of the annotation
#
# display fields:
# CN, DN, date, contact, reason, location
#
# Dict format:
# appearance = dict(
# background = Image with alpha / None,
# icon = Image with alpha / None,
# labels = bool,
# display = list,
# software = str,
# outline = [R, G, B],
# border = int,
# )
sig = {}
for f in ('background', 'icon', 'labels', 'border', 'outline'):
if f in udct['signature_appearance']:
sig[f] = udct['signature_appearance'][f]
toggles = udct['signature_appearance'].get('display', [])
for f in ('contact', 'reason', 'location', 'contact',
'signingdate'):
if f in toggles:
sig[f] = udct.get(f, '{} unknown'.format(f))
if 'date' in toggles:
sig['date'] = udct['signingdate']
if 'CN' in toggles:
from cryptography.x509 import ObjectIdentifier
sig['CN'] = cert.subject.get_attributes_for_oid(
ObjectIdentifier('2.5.4.3'))[0].value
if 'DN' in toggles:
sig['DN'] = cert.subject.rfc4514_string()
annotation.simple_signature(sig)
else:
# Manual signature annotation creation
#
# Make your own appearance with an arbitrary number of
# images and fonts
if 'manual_images' in udct:
for name, img in udct['manual_images'].items():
annotation.add_image(img, name=name)
if 'manual_fonts' in udct:
for name, path in udct['manual_fonts'].items():
annotation.add_ttf_font(path, name=name)
annotation.add_default_font()
annotation.set_signature_appearance(*udct['signature_manual'])
pdfa = annotation.as_pdf_object(identity(), page=page0ref)
objapn = self._extend(pdfa["/AP"]["/N"])
objapnref = self._addObject(objapn)
objap = po.DictionaryObject()
objap[po.NameObject("/N")] = objapnref
obj13.update({
po.NameObject("/Rect"):
po.ArrayObject([
po.FloatObject(x1),
po.FloatObject(y1),
po.FloatObject(x2),
po.FloatObject(y2),
]),
po.NameObject("/AP"):
objap,
#po.NameObject("/SM"): po.createStringObject("TabletPOSinline"),
})
page0 = page0ref.getObject()
if new_13:
annots = po.ArrayObject([obj13ref])
if "/Annots" in page0:
page0annots = page0["/Annots"]
if isinstance(page0annots, po.IndirectObject):
annots.insert(0, page0annots)
elif isinstance(page0annots, po.ArrayObject):
annots = page0annots
annots.append(obj13ref)
else:
annots = page0["/Annots"]
page0.update({po.NameObject("/Annots"): annots})
self._objects[page0ref.idnum - 1] = page0
if udct.get("sigandcertify", False) and "/Perms" not in catalog:
obj10 = po.DictionaryObject()
obj10ref = self._addObject(obj10)
obj11 = po.DictionaryObject()
obj11ref = self._addObject(obj11)
obj14 = po.DictionaryObject()
obj14ref = self._addObject(obj14)
obj14.update({po.NameObject("/DocMDP"): obj12ref})
obj10.update({
po.NameObject("/Type"):
po.NameObject("/TransformParams"),
po.NameObject("/P"):
po.NumberObject(udct.get("sigflags", 3)),
po.NameObject("/V"):
po.NameObject("/1.2"),
})
obj11.update({
po.NameObject("/Type"):
po.NameObject("/SigRef"),
po.NameObject("/TransformMethod"):
po.NameObject("/DocMDP"),
po.NameObject("/DigestMethod"):
po.NameObject("/" + algomd.upper()),
po.NameObject("/TransformParams"):
obj10ref,
})
obj12[po.NameObject("/Reference")] = po.ArrayObject([obj11ref])
catalog[po.NameObject("/Perms")] = obj14ref
if "/AcroForm" in catalog:
form = catalog["/AcroForm"].getObject()
if "/Fields" in form:
fields = form["/Fields"]
old_field_names = [f.getObject()['/T'] for f in fields]
else:
fields = po.ArrayObject()
old_field_names = []
if udct.get('auto_sigfield',
False) and obj13['/T'] in old_field_names:
name_base = udct.get('sigfield', 'Signature1')
checklist = [
f[len(name_base):] for f in old_field_names
if f.startswith(name_base)
]
for i in range(1, len(checklist) + 1):
suffix = '_{}'.format(i)
if suffix in checklist:
next
new_name = '{}{}'.format(name_base, suffix)
obj13.update(
{po.NameObject("/T"): EncodedString(new_name)})
break
old_flags = int(form.get("/SigFlags", 0))
new_flags = int(form.get("/SigFlags", 0)) | udct.get("sigflags", 3)
if new_13:
fields.append(obj13ref)
form.update({
po.NameObject("/Fields"):
fields,
po.NameObject("/SigFlags"):
po.NumberObject(new_flags),
})
elif new_flags > old_flags:
form.update({
po.NameObject("/SigFlags"):
po.NumberObject(new_flags),
})
formref = catalog.raw_get("/AcroForm")
if isinstance(formref, po.IndirectObject):
self._objects[formref.idnum - 1] = form
form = formref
else:
form = po.DictionaryObject()
form.update({
po.NameObject("/Fields"):
po.ArrayObject([obj13ref]),
po.NameObject("/SigFlags"):
po.NumberObject(udct.get("sigflags", 3)),
})
catalog[po.NameObject("/AcroForm")] = form
if "/Metadata" in catalog:
catalog[po.NameObject("/Metadata")] = catalog.raw_get("/Metadata")
x_root = prev.trailer.raw_get("/Root")
self._objects[x_root.idnum - 1] = catalog
self.x_root = po.IndirectObject(x_root.idnum, 0, self)
self.x_info = prev.trailer.get("/Info")