77 lines
2.8 KiB
Python
77 lines
2.8 KiB
Python
"""鉴权拒绝留痕公共出口（手册 P-05 双写；T-04 评审 P1-2 收口）。
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背景：越权留痕原本只在 API 层（api/deps._authz_audit）实现，对话 Tool 层
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归属被拒时只落 agent_tool_call，全局鉴权审计维度缺失（输入防护台账查不到
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对话链路的越权尝试）。本模块把该逻辑下沉到 utils，供两方共用：
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- API 层：deps.deny / _authz_audit（403）
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- 对话层：tool_service.run_tool 的 blocked 分支（AUTH_403_* 归属拒绝）
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放 utils 而非 api 的原因：service 层不得反向依赖 api 层（分层约束）。
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降级口径（与 T-02 审计一致）：写库失败仅本地 logger.exception，不改变
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拒绝语义——对话不因留痕故障中断，生产可切 fail-closed（待决，已登记）。
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"""
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from __future__ import annotations
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import logging
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from typing import Any, Sequence
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from app.utils.trace import current_trace, new_trace
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logger = logging.getLogger(__name__)
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# 四 Agent 入口（input_guard_log.agent_type 的 ENUM 仅此四值；platform 跳过）
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AGENT_TYPES = ("customer", "advisor", "analyst", "risk")
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def record_authz_denial(
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risk_repo: Any,
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*,
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actor_id: str,
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code: str,
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roles: Sequence[str] | None = None,
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customer_id: str | None = None,
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agent_type: str = "risk",
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trace_id: str | None = None,
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) -> None:
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"""越权/拒绝留痕：audit_log(authz) + input_guard_log（四 Agent 内）。
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agent_type 非四 Agent（如 platform 网关）时只写 audit_log——
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input_guard_log.agent_type 是 ENUM，越界写会报数据截断（T-02 同口径）。
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"""
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trace_id = trace_id or current_trace() or new_trace()
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try:
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risk_repo.insert_audit_log(
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{
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"trace_id": trace_id,
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"event_type": "authz",
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"agent_type": agent_type,
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"actor_id": actor_id or "anonymous",
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"customer_id": customer_id,
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"rule_id": None,
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"input_summary": {"roles": list(roles or []), "code": code},
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"decision": "forbidden",
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"risk_score": None,
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"handler_id": None,
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"handler_result": None,
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"handler_comment": None,
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}
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)
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if agent_type in AGENT_TYPES:
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risk_repo.insert_input_guard_log(
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trace_id=trace_id,
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agent_type=agent_type,
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actor_id=actor_id or "anonymous",
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guard_type="illegal_param",
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action="blocked",
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raw_excerpt=code,
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)
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except Exception:
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logger.exception(
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"authz audit failed (degraded): code=%s agent=%s actor=%s",
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code,
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agent_type,
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actor_id,
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)
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