87 lines
3.2 KiB
Python
87 lines
3.2 KiB
Python
from __future__ import absolute_import
|
|
|
|
import logging
|
|
|
|
try:
|
|
from cStringIO import StringIO
|
|
except ImportError:
|
|
from StringIO import StringIO
|
|
|
|
from django.utils.translation import ugettext_lazy as _
|
|
#from django.db.models.signals import post_save
|
|
#from django.dispatch import receiver
|
|
|
|
from documents.models import Document, DocumentVersion
|
|
from navigation.api import bind_links, Link
|
|
from django_gpg.runtime import gpg
|
|
from django_gpg.exceptions import GPGDecryptionError
|
|
from acls.api import class_permissions
|
|
|
|
from .models import DocumentVersionSignature
|
|
from .permissions import (
|
|
PERMISSION_DOCUMENT_VERIFY, PERMISSION_SIGNATURE_UPLOAD,
|
|
PERMISSION_SIGNATURE_DOWNLOAD, PERMISSION_SIGNATURE_DELETE
|
|
)
|
|
from .links import (document_signature_upload, document_signature_download,
|
|
document_signature_delete, document_verify)
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
def document_pre_open_hook(descriptor, instance):
|
|
if DocumentVersionSignature.objects.has_embedded_signature(instance.document):
|
|
# If it has an embedded signature decrypt
|
|
try:
|
|
result = gpg.decrypt_file(descriptor, close_descriptor=False)
|
|
# gpg return a string, turn it into a file like object
|
|
except GPGDecryptionError:
|
|
# At least return the original raw content
|
|
descriptor.seek(0)
|
|
return descriptor
|
|
else:
|
|
descriptor.close()
|
|
return StringIO(result.data)
|
|
else:
|
|
# It no embedded signature pass along
|
|
# Doing this single DB lookup avoids trying to decrypt non signed
|
|
# files always, which could result in slow down for big non signed
|
|
# files
|
|
#descriptor.seek(0)
|
|
return descriptor
|
|
|
|
#try:
|
|
# result = gpg.decrypt_file(descriptor, close_descriptor=False)
|
|
# # gpg return a string, turn it into a file like object
|
|
#except GPGDecryptionError:
|
|
# # At least return the original raw content
|
|
# descriptor.seek(0)
|
|
# return descriptor
|
|
#else:
|
|
# descriptor.close()
|
|
# return StringIO(result.data)
|
|
|
|
|
|
def document_post_save_hook(instance):
|
|
if not instance.pk:
|
|
document_signature, created = DocumentVersionSignature.objects.get_or_create(
|
|
document_version=instance.latest_version,
|
|
)
|
|
#DocumentVersionSignature.objects.update_signed_state(instance.document)
|
|
|
|
#@receiver(post_save, dispatch_uid='check_document_signature_state', sender=DocumentVersion)
|
|
#def check_document_signature_state(sender, instance, **kwargs):
|
|
# if kwargs.get('created', False):
|
|
# DocumentVersionSignature.objects.signature_state(instance.document)
|
|
|
|
|
|
bind_links([Document], [document_verify], menu_name='form_header')
|
|
bind_links(['document_verify', 'document_signature_upload', 'document_signature_download', 'document_signature_delete'], [document_signature_upload, document_signature_download, document_signature_delete], menu_name='sidebar')
|
|
|
|
DocumentVersion.register_pre_open_hook(1, document_pre_open_hook)
|
|
DocumentVersion.register_post_save_hook(1, document_post_save_hook)
|
|
|
|
class_permissions(Document, [
|
|
PERMISSION_DOCUMENT_VERIFY, PERMISSION_SIGNATURE_UPLOAD,
|
|
PERMISSION_SIGNATURE_DOWNLOAD, PERMISSION_SIGNATURE_DELETE
|
|
])
|