moviewyrm/fedireads/activitypub/create.py
2020-02-17 20:12:19 -08:00

33 lines
1 KiB
Python

''' format Create activities and sign them '''
from base64 import b64encode
from Crypto.PublicKey import RSA
from Crypto.Signature import pkcs1_15
from Crypto.Hash import SHA256
def get_create(user, status_json):
''' create activitypub json for a Create activity '''
signer = pkcs1_15.new(RSA.import_key(user.private_key))
content = status_json['content']
signed_message = signer.sign(SHA256.new(content.encode('utf8')))
return {
'@context': 'https://www.w3.org/ns/activitystreams',
'id': '%s/activity' % status_json['id'],
'type': 'Create',
'actor': user.actor,
'published': status_json['published'],
'to': ['%s/followers' % user.actor],
'cc': ['https://www.w3.org/ns/activitystreams#Public'],
'object': status_json,
'signature': {
'type': 'RsaSignature2017',
'creator': '%s#main-key' % user.absolute_id,
'created': status_json['published'],
'signatureValue': b64encode(signed_message).decode('utf8'),
}
}