mirror of https://github.com/MISP/PyMISP
67 lines
2.8 KiB
Python
67 lines
2.8 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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from ..exceptions import InvalidMISPObject
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from .abstractgenerator import AbstractMISPObjectGenerator
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from io import BytesIO
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import logging
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from email import message_from_bytes, policy
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logger = logging.getLogger('pymisp')
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class EMailObject(AbstractMISPObjectGenerator):
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def __init__(self, filepath=None, pseudofile=None, attach_original_email=True, standalone=True, **kwargs):
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# PY3 way:
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# super().__init__('file')
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super(EMailObject, self).__init__('email', standalone=standalone, **kwargs)
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if filepath:
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with open(filepath, 'rb') as f:
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self.__pseudofile = BytesIO(f.read())
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elif pseudofile and isinstance(pseudofile, BytesIO):
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self.__pseudofile = pseudofile
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else:
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raise InvalidMISPObject('File buffer (BytesIO) or a path is required.')
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self.__email = message_from_bytes(self.__pseudofile.getvalue(), policy=policy.default)
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if attach_original_email:
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self.add_attribute('eml', value='Full email.eml', data=self.__pseudofile)
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self.generate_attributes()
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@property
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def email(self):
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return self.__email
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@property
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def attachments(self):
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to_return = []
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for attachment in self.__email.iter_attachments():
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content = attachment.get_content()
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if isinstance(content, str):
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content = content.encode()
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to_return.append((attachment.get_filename(), BytesIO(content)))
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return to_return
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def generate_attributes(self):
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if self.__email.get_body(preferencelist=('html', 'plain')):
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self.add_attribute('email-body', value=self.__email.get_body(preferencelist=('html', 'plain')).get_payload(decode=True).decode('utf8', 'surrogateescape'))
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if 'Reply-To' in self.__email:
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self.add_attribute('reply-to', value=self.__email['Reply-To'])
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if 'Message-ID' in self.__email:
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self.add_attribute('message-id', value=self.__email['Message-ID'])
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if 'To' in self.__email:
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to_add = [to.strip() for to in self.__email['To'].split(',')]
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self.add_attributes('to', *to_add)
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if 'Cc' in self.__email:
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to_add = [to.strip() for to in self.__email['Cc'].split(',')]
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self.add_attributes('cc', *to_add)
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if 'Subject' in self.__email:
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self.add_attribute('subject', value=self.__email['Subject'])
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if 'From' in self.__email:
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to_add = [to.strip() for to in self.__email['From'].split(',')]
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self.add_attributes('from', *to_add)
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if 'Return-Path' in self.__email:
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self.add_attribute('return-path', value=self.__email['Return-Path'])
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if 'User-Agent' in self.__email:
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self.add_attribute('user-agent', value=self.__email['User-Agent'])
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