51 lines
1.3 KiB
Python
51 lines
1.3 KiB
Python
"""
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ⒸAngelaMos | 2025
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X3DH signed prekey model for medium term key rotation
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"""
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from datetime import datetime
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from typing import TYPE_CHECKING
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from uuid import UUID
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from sqlalchemy import DateTime
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from sqlmodel import Field
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from app.config import SIGNATURE_LENGTH, SIGNED_PREKEY_LENGTH
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from app.models.Base import BaseDBModel
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if TYPE_CHECKING:
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pass
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class SignedPrekey(BaseDBModel, table = True):
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"""
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X25519 signed prekey rotated every 48 hours for X3DH protocol
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"""
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__tablename__ = "signed_prekeys"
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id: int = Field(default = None, primary_key = True)
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user_id: UUID = Field(
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foreign_key = "users.id",
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nullable = False,
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index = True
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)
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key_id: int = Field(nullable = False, index = True)
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public_key: str = Field(nullable = False, max_length = SIGNED_PREKEY_LENGTH)
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private_key: str = Field(nullable = False, max_length = SIGNED_PREKEY_LENGTH)
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signature: str = Field(nullable = False, max_length = SIGNATURE_LENGTH)
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is_active: bool = Field(default = True, nullable = False)
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expires_at: datetime | None = Field(
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default = None,
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sa_type = DateTime(timezone = True),
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)
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def __repr__(self) -> str:
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"""
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String representation of SignedPrekey
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"""
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return f"<SignedPrekey user_id={self.user_id} key_id={self.key_id}>"
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