mirror of https://gitlab.com/bashrc2/epicyon
623 lines
19 KiB
Python
623 lines
19 KiB
Python
__filename__ = "pgp.py"
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__author__ = "Bob Mottram"
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__license__ = "AGPL3+"
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__version__ = "1.2.0"
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__maintainer__ = "Bob Mottram"
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__email__ = "bob@libreserver.org"
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__status__ = "Production"
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__module_group__ = "Profile Metadata"
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import os
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import subprocess
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from pathlib import Path
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from person import get_actor_json
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from utils import contains_pgp_public_key
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from utils import is_pgp_encrypted
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from utils import get_full_domain
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from utils import get_status_number
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from utils import local_actor_url
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from utils import replace_users_with_at
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from webfinger import webfinger_handle
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from posts import get_person_box
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from auth import create_basic_auth_header
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from session import post_json
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def get_email_address(actor_json: {}) -> str:
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"""Returns the email address for the given actor
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"""
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if not actor_json.get('attachment'):
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return ''
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for property_value in actor_json['attachment']:
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if not property_value.get('name'):
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continue
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if not property_value['name'].lower().startswith('email'):
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continue
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if not property_value.get('type'):
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continue
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if not property_value.get('value'):
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continue
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if property_value['type'] != 'PropertyValue':
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continue
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if '@' not in property_value['value']:
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continue
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if '.' not in property_value['value']:
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continue
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return property_value['value']
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return ''
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def get_pgp_pub_key(actor_json: {}) -> str:
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"""Returns PGP public key for the given actor
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"""
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if not actor_json.get('attachment'):
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return ''
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for property_value in actor_json['attachment']:
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if not property_value.get('name'):
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continue
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if not property_value['name'].lower().startswith('pgp'):
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continue
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if not property_value.get('type'):
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continue
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if not property_value.get('value'):
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continue
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if property_value['type'] != 'PropertyValue':
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continue
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if not contains_pgp_public_key(property_value['value']):
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continue
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return property_value['value']
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return ''
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def get_pgp_fingerprint(actor_json: {}) -> str:
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"""Returns PGP fingerprint for the given actor
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"""
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if not actor_json.get('attachment'):
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return ''
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for property_value in actor_json['attachment']:
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if not property_value.get('name'):
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continue
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if not property_value['name'].lower().startswith('openpgp'):
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continue
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if not property_value.get('type'):
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continue
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if not property_value.get('value'):
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continue
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if property_value['type'] != 'PropertyValue':
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continue
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if len(property_value['value']) < 10:
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continue
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return property_value['value']
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return ''
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def set_email_address(actor_json: {}, email_address: str) -> None:
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"""Sets the email address for the given actor
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"""
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not_email_address = False
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if '@' not in email_address:
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not_email_address = True
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if '.' not in email_address:
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not_email_address = True
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if '<' in email_address:
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not_email_address = True
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if email_address.startswith('@'):
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not_email_address = True
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if not actor_json.get('attachment'):
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actor_json['attachment'] = []
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# remove any existing value
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property_found = None
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for property_value in actor_json['attachment']:
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if not property_value.get('name'):
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continue
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if not property_value.get('type'):
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continue
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if not property_value['name'].lower().startswith('email'):
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continue
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property_found = property_value
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break
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if property_found:
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actor_json['attachment'].remove(property_found)
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if not_email_address:
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return
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for property_value in actor_json['attachment']:
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if not property_value.get('name'):
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continue
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if not property_value.get('type'):
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continue
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if not property_value['name'].lower().startswith('email'):
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continue
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if property_value['type'] != 'PropertyValue':
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continue
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property_value['value'] = email_address
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return
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new_email_address = {
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"name": "Email",
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"type": "PropertyValue",
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"value": email_address
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}
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actor_json['attachment'].append(new_email_address)
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def set_pgp_pub_key(actor_json: {}, pgp_pub_key: str) -> None:
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"""Sets a PGP public key for the given actor
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"""
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remove_key = False
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if not pgp_pub_key:
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remove_key = True
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else:
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if not contains_pgp_public_key(pgp_pub_key):
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remove_key = True
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if '<' in pgp_pub_key:
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remove_key = True
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if not actor_json.get('attachment'):
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actor_json['attachment'] = []
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# remove any existing value
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property_found = None
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for property_value in actor_json['attachment']:
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if not property_value.get('name'):
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continue
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if not property_value.get('type'):
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continue
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if not property_value['name'].lower().startswith('pgp'):
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continue
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property_found = property_value
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break
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if property_found:
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actor_json['attachment'].remove(property_value)
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if remove_key:
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return
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for property_value in actor_json['attachment']:
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if not property_value.get('name'):
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continue
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if not property_value.get('type'):
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continue
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if not property_value['name'].lower().startswith('pgp'):
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continue
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if property_value['type'] != 'PropertyValue':
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continue
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property_value['value'] = pgp_pub_key
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return
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newpgp_pub_key = {
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"name": "PGP",
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"type": "PropertyValue",
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"value": pgp_pub_key
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}
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actor_json['attachment'].append(newpgp_pub_key)
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def set_pgp_fingerprint(actor_json: {}, fingerprint: str) -> None:
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"""Sets a PGP fingerprint for the given actor
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"""
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remove_fingerprint = False
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if not fingerprint:
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remove_fingerprint = True
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else:
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if len(fingerprint) < 10:
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remove_fingerprint = True
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if not actor_json.get('attachment'):
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actor_json['attachment'] = []
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# remove any existing value
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property_found = None
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for property_value in actor_json['attachment']:
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if not property_value.get('name'):
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continue
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if not property_value.get('type'):
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continue
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if not property_value['name'].lower().startswith('openpgp'):
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continue
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property_found = property_value
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break
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if property_found:
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actor_json['attachment'].remove(property_value)
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if remove_fingerprint:
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return
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for property_value in actor_json['attachment']:
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if not property_value.get('name'):
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continue
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if not property_value.get('type'):
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continue
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if not property_value['name'].lower().startswith('openpgp'):
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continue
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if property_value['type'] != 'PropertyValue':
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continue
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property_value['value'] = fingerprint.strip()
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return
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newpgp_fingerprint = {
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"name": "OpenPGP",
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"type": "PropertyValue",
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"value": fingerprint
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}
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actor_json['attachment'].append(newpgp_fingerprint)
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def extract_pgp_public_key(content: str) -> str:
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"""Returns the PGP key from the given text
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"""
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start_block = '--BEGIN PGP PUBLIC KEY BLOCK--'
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end_block = '--END PGP PUBLIC KEY BLOCK--'
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if start_block not in content:
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return None
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if end_block not in content:
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return None
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if '\n' not in content:
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return None
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lines_list = content.split('\n')
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extracting = False
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public_key = ''
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for line in lines_list:
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if not extracting:
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if start_block in line:
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extracting = True
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else:
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if end_block in line:
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public_key += line
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break
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if extracting:
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public_key += line + '\n'
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return public_key
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def _pgp_import_pub_key(recipient_pub_key: str) -> str:
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""" Import the given public key
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"""
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# do a dry run
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cmd_import_pub_key = \
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'echo "' + recipient_pub_key + \
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'" | gpg --dry-run --import 2> /dev/null'
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proc = subprocess.Popen([cmd_import_pub_key],
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stdout=subprocess.PIPE, shell=True)
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(import_result, err) = proc.communicate()
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if err:
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return None
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# this time for real
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cmd_import_pub_key = \
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'echo "' + recipient_pub_key + '" | gpg --import 2> /dev/null'
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proc = subprocess.Popen([cmd_import_pub_key],
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stdout=subprocess.PIPE, shell=True)
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(import_result, err) = proc.communicate()
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if err:
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return None
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# get the key id
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cmd_import_pub_key = \
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'echo "' + recipient_pub_key + '" | gpg --show-keys'
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proc = subprocess.Popen([cmd_import_pub_key],
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stdout=subprocess.PIPE, shell=True)
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(import_result, err) = proc.communicate()
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if not import_result:
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return None
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import_result = import_result.decode('utf-8').split('\n')
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key_id = ''
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for line in import_result:
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if line.startswith('pub'):
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continue
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if line.startswith('uid'):
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continue
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if line.startswith('sub'):
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continue
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key_id = line.strip()
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break
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return key_id
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def _pgp_encrypt(content: str, recipient_pub_key: str) -> str:
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""" Encrypt using your default pgp key to the given recipient
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"""
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key_id = _pgp_import_pub_key(recipient_pub_key)
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if not key_id:
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return None
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cmd_encrypt = \
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'echo "' + content + '" | gpg --encrypt --armor --recipient ' + \
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key_id + ' 2> /dev/null'
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proc = subprocess.Popen([cmd_encrypt],
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stdout=subprocess.PIPE, shell=True)
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(encrypt_result, _) = proc.communicate()
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if not encrypt_result:
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return None
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encrypt_result = encrypt_result.decode('utf-8')
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if not is_pgp_encrypted(encrypt_result):
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return None
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return encrypt_result
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def _get_pgp_public_key_from_actor(signing_priv_key_pem: str,
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domain: str, handle: str,
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actor_json: {} = None) -> str:
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"""Searches tags on the actor to see if there is any PGP
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public key specified
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"""
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if not actor_json:
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actor_json, _ = \
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get_actor_json(domain, handle, False, False, False, True,
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signing_priv_key_pem, None)
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if not actor_json:
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return None
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if not actor_json.get('attachment'):
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return None
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if not isinstance(actor_json['attachment'], list):
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return None
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# search through the tags on the actor
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for tag in actor_json['attachment']:
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if not isinstance(tag, dict):
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continue
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if not tag.get('value'):
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continue
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if not isinstance(tag['value'], str):
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continue
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if contains_pgp_public_key(tag['value']):
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return tag['value']
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return None
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def has_local_pg_pkey() -> bool:
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"""Returns true if there is a local .gnupg directory
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"""
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home_dir = str(Path.home())
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gpg_dir = home_dir + '/.gnupg'
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if os.path.isdir(gpg_dir):
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key_id = pgp_local_public_key()
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if key_id:
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return True
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return False
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def pgp_encrypt_to_actor(domain: str, content: str, toHandle: str,
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signing_priv_key_pem: str) -> str:
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"""PGP encrypt a message to the given actor or handle
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"""
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# get the actor and extract the pgp public key from it
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recipient_pub_key = \
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_get_pgp_public_key_from_actor(signing_priv_key_pem, domain, toHandle)
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if not recipient_pub_key:
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return None
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# encrypt using the recipient public key
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return _pgp_encrypt(content, recipient_pub_key)
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def pgp_decrypt(domain: str, content: str, fromHandle: str,
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signing_priv_key_pem: str) -> str:
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""" Encrypt using your default pgp key to the given recipient
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fromHandle can be a handle or actor url
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"""
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if not is_pgp_encrypted(content):
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return content
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# if the public key is also included within the message then import it
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if contains_pgp_public_key(content):
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pub_key = extract_pgp_public_key(content)
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else:
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pub_key = \
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_get_pgp_public_key_from_actor(signing_priv_key_pem,
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domain, content, fromHandle)
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if pub_key:
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_pgp_import_pub_key(pub_key)
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cmd_decrypt = \
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'echo "' + content + '" | gpg --decrypt --armor 2> /dev/null'
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proc = subprocess.Popen([cmd_decrypt],
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stdout=subprocess.PIPE, shell=True)
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(decrypt_result, _) = proc.communicate()
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if not decrypt_result:
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return content
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decrypt_result = decrypt_result.decode('utf-8').strip()
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return decrypt_result
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def _pgp_local_public_key_id() -> str:
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"""Gets the local pgp public key ID
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"""
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cmd_str = \
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"gpgconf --list-options gpg | " + \
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"awk -F: '$1 == \"default-key\" {print $10}'"
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proc = subprocess.Popen([cmd_str],
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stdout=subprocess.PIPE, shell=True)
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(result, err) = proc.communicate()
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if err:
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return None
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if not result:
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return None
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if len(result) < 5:
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return None
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return result.decode('utf-8').replace('"', '').strip()
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def pgp_local_public_key() -> str:
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"""Gets the local pgp public key
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"""
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key_id = _pgp_local_public_key_id()
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if not key_id:
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key_id = ''
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cmd_str = "gpg --armor --export " + key_id
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proc = subprocess.Popen([cmd_str],
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stdout=subprocess.PIPE, shell=True)
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(result, err) = proc.communicate()
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if err:
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return None
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if not result:
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return None
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return extract_pgp_public_key(result.decode('utf-8'))
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def pgp_public_key_upload(base_dir: str, session,
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nickname: str, password: str,
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domain: str, port: int,
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http_prefix: str,
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cached_webfingers: {}, person_cache: {},
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debug: bool, test: str,
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signing_priv_key_pem: str) -> {}:
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if debug:
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print('pgp_public_key_upload')
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if not session:
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if debug:
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print('WARN: No session for pgp_public_key_upload')
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return None
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if not test:
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if debug:
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print('Getting PGP public key')
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pgp_pub_key = pgp_local_public_key()
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if not pgp_pub_key:
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return None
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pgp_pub_key_id = _pgp_local_public_key_id()
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else:
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if debug:
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print('Testing with PGP public key ' + test)
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pgp_pub_key = test
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pgp_pub_key_id = None
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domain_full = get_full_domain(domain, port)
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if debug:
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print('PGP test domain: ' + domain_full)
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handle = nickname + '@' + domain_full
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if debug:
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print('Getting actor for ' + handle)
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actor_json, _ = \
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get_actor_json(domain_full, handle, False, False, debug, True,
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signing_priv_key_pem, session)
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if not actor_json:
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if debug:
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print('No actor returned for ' + handle)
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return None
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if debug:
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print('Actor for ' + handle + ' obtained')
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actor = local_actor_url(http_prefix, nickname, domain_full)
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handle = replace_users_with_at(actor)
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# check that this looks like the correct actor
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if not actor_json.get('id'):
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if debug:
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print('Actor has no id')
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return None
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if not actor_json.get('url'):
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if debug:
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print('Actor has no url')
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return None
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if not actor_json.get('type'):
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if debug:
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print('Actor has no type')
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return None
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if actor_json['id'] != actor:
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if debug:
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print('Actor id is not ' + actor +
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' instead is ' + actor_json['id'])
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return None
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if actor_json['url'] != handle:
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if debug:
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print('Actor url is not ' + handle)
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return None
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if actor_json['type'] != 'Person':
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if debug:
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print('Actor type is not Person')
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return None
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# set the pgp details
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if pgp_pub_key_id:
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set_pgp_fingerprint(actor_json, pgp_pub_key_id)
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else:
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if debug:
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print('No PGP key Id. Continuing anyway.')
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if debug:
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print('Setting PGP key within ' + actor)
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set_pgp_pub_key(actor_json, pgp_pub_key)
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# create an actor update
|
|
status_number, _ = get_status_number()
|
|
actor_update = {
|
|
'@context': 'https://www.w3.org/ns/activitystreams',
|
|
'id': actor + '#updates/' + status_number,
|
|
'type': 'Update',
|
|
'actor': actor,
|
|
'to': [actor],
|
|
'cc': [],
|
|
'object': actor_json
|
|
}
|
|
if debug:
|
|
print('actor update is ' + str(actor_update))
|
|
|
|
# lookup the inbox for the To handle
|
|
wf_request = \
|
|
webfinger_handle(session, handle, http_prefix, cached_webfingers,
|
|
domain, __version__, debug, False,
|
|
signing_priv_key_pem)
|
|
if not wf_request:
|
|
if debug:
|
|
print('DEBUG: pgp actor update webfinger failed for ' +
|
|
handle)
|
|
return None
|
|
if not isinstance(wf_request, dict):
|
|
if debug:
|
|
print('WARN: Webfinger for ' + handle +
|
|
' did not return a dict. ' + str(wf_request))
|
|
return None
|
|
|
|
post_to_box = 'outbox'
|
|
|
|
# get the actor inbox for the To handle
|
|
origin_domain = domain
|
|
(inbox_url, _, _, from_person_id, _, _,
|
|
_, _) = get_person_box(signing_priv_key_pem, origin_domain,
|
|
base_dir, session, wf_request,
|
|
person_cache,
|
|
__version__, http_prefix, nickname,
|
|
domain, post_to_box, 35725)
|
|
|
|
if not inbox_url:
|
|
if debug:
|
|
print('DEBUG: No ' + post_to_box + ' was found for ' + handle)
|
|
return None
|
|
if not from_person_id:
|
|
if debug:
|
|
print('DEBUG: No actor was found for ' + handle)
|
|
return None
|
|
|
|
auth_header = create_basic_auth_header(nickname, password)
|
|
|
|
headers = {
|
|
'host': domain,
|
|
'Content-type': 'application/json',
|
|
'Authorization': auth_header
|
|
}
|
|
quiet = not debug
|
|
tries = 0
|
|
while tries < 4:
|
|
post_result = \
|
|
post_json(http_prefix, domain_full,
|
|
session, actor_update, [], inbox_url,
|
|
headers, 5, quiet)
|
|
if post_result:
|
|
break
|
|
tries += 1
|
|
|
|
if post_result is None:
|
|
if debug:
|
|
print('DEBUG: POST pgp actor update failed for c2s to ' +
|
|
inbox_url)
|
|
return None
|
|
|
|
if debug:
|
|
print('DEBUG: c2s POST pgp actor update success')
|
|
|
|
return actor_update
|