onion: add keys and certs to database

app/models/onions.py

@@ -1,3 +1,6 @@
+import base64
+import hashlib
+
 from app.brm.brn import BRN
 from app.extensions import db
 from app.models import AbstractConfiguration, AbstractResource
@@ -18,8 +21,31 @@ class Onion(AbstractConfiguration):
     domain_name = db.Column(db.String(255), nullable=False)
     onion_name = db.Column(db.String(56), nullable=False, unique=True)
 
+    onion_public_key = db.Column(db.LargeBinary, nullable=False)
+    onion_private_key = db.Column(db.LargeBinary, nullable=False)
+
+    tls_public_key = db.Column(db.LargeBinary, nullable=False)
+    tls_private_key = db.Column(db.LargeBinary, nullable=False)
+
     group = db.relationship("Group", back_populates="onions")
 
+    @property
+    def calculated_onion_name(self):
+        p = self.onion_public_key[32:]
+
+        h = hashlib.sha3_256()
+        h.update(b".onion checksum")
+        h.update(p)
+        h.update(b"\x03")
+        checksum = h.digest()
+
+        result = bytearray(p)
+        result.extend(checksum[0:2])
+        result.append(0x03)
+
+        onion = base64.b32encode(result).decode("utf-8").strip("=")
+        return onion.lower()
+
 
 class Eotk(AbstractResource):
     group_id = db.Column(db.Integer(), db.ForeignKey("group.id"), nullable=False)