65 lines
2.4 KiB
Python
65 lines
2.4 KiB
Python
from typing import Optional
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class AttestedAgent:
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"""A lightweight attested agent scaffold.
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Each agent has an id and a hardware class. Attestation generates a credential that
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would be used to enforce contract permissions in a real deployment.
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"""
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def __init__(self, agent_id: str, hardware: str = "TEE"): # pragma: no cover - trivial
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self.agent_id = agent_id
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self.hardware = hardware
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self._credential: Optional[str] = None
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# Lightweight DID-style identity; in a real system this would be bound to
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# a hardware-backed identity and rotated periodically.
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self._did: Optional[str] = None
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def attest(self) -> bool:
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# In a real system, remote attestation would happen here.
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self._credential = f"attest-{self.agent_id}-{self.hardware}-v1"
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# Issue or refresh a minimal DID identity alongside attestation
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if self._did is None:
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self._did = f"did:gridguard:{self.agent_id}"
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return True
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@property
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def credential(self) -> Optional[str]:
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return self._credential
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def verify_credential(self, credential: str) -> bool:
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"""Lightweight credential verifier.
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In a real deployment this would cryptographically verify the
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remote attestation report. Here we perform a deterministic check
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against the produced credential for testability and auditing.
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"""
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expected = f"attest-{self.agent_id}-{self.hardware}-v1"
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return credential == expected
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@property
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def did(self) -> str:
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"""Return the agent's Decentralized Identifier (DID).
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If not yet issued, lazily generate a simple DID. This is a lightweight
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stand-in for DID/identity binding in MVP contexts.
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"""
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if self._did is None:
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self._did = f"did:gridguard:{self.agent_id}"
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return self._did
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def rotate_identity(self) -> None:
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"""Rotate the agent's identity to simulate short-lived credentials.
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In a production system this would refresh attestation keys and rotate
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credentials. Here we simply mutate the DID suffix to reflect rotation.
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"""
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suffix = getattr(self, "_did", None)
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if suffix is None:
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self._did = f"did:gridguard:{self.agent_id}"
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else:
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# Simple rotation by appending a timestamp-like suffix
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import time
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self._did = f"did:gridguard:{self.agent_id}:{int(time.time())}"
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