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