init

src/globals.py

@@ -0,0 +1,50 @@
+from cryptography.hazmat.backends import default_backend
+from cryptography.hazmat.primitives import serialization
+import hashlib
+import base64
+import json
+import re
+import os
+
+def canonical_json(value):
+	return json.dumps(
+		value,
+		ensure_ascii=False,
+		separators=(',',':'),
+		sort_keys=True
+	).encode("UTF-8")
+
+'''
+def encode_base64(data: bytes) -> str:
+	return base64.b64encode(data).decode('utf-8')
+
+def sign_json(json_object, signing_key, signing_name):
+	signatures = json_object.pop("signatures", {})
+	unsigned = json_object.pop("unsigned", None)
+
+	signed = signing_key.sign(canonical_json(json_object))
+	signature_base64 = encode_base64(signed)
+
+	key_id = "ed25519:VonaA"
+	signatures.setdefault(signing_name, {})[key_id] = signature_base64
+
+	json_object["signatures"] = signatures
+	if unsigned is not None:
+		json_object["unsigned"] = unsigned
+
+	return json_object
+'''
+
+vona_version = '1.2.3'
+
+def make_event_id():
+	return re.sub(r'[\/+=]', '_', base64.b64encode(os.urandom(32)).decode('utf-8'))[:44]
+
+def hash_event(input) -> str:
+	input.pop('signatures', None)
+	input.pop('unsigned', None)
+
+	sha256_hash = hashlib.sha256(canonical_json(input)).digest()
+	base64_encoded = base64.b64encode(sha256_hash)
+	
+	return base64_encoded.decode().rstrip('=')