665 lines
21 KiB
Python
665 lines
21 KiB
Python
"""
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DeepAudit 审计工作流图 - LLM 驱动版
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使用 LangGraph 构建 LLM 驱动的 Agent 协作流程
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重要改变：路由决策由 LLM 参与，而不是硬编码条件！
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"""
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from typing import TypedDict, Annotated, List, Dict, Any, Optional, Literal
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from datetime import datetime
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import operator
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import logging
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import json
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from langgraph.graph import StateGraph, END
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from langgraph.checkpoint.memory import MemorySaver
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from langgraph.prebuilt import ToolNode
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logger = logging.getLogger(__name__)
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# ============ 状态定义 ============
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class Finding(TypedDict):
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"""漏洞发现"""
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id: str
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vulnerability_type: str
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severity: str
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title: str
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description: str
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file_path: Optional[str]
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line_start: Optional[int]
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code_snippet: Optional[str]
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is_verified: bool
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confidence: float
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source: str
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class AuditState(TypedDict):
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"""
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审计状态
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在整个工作流中传递和更新
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"""
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# 输入
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project_root: str
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project_info: Dict[str, Any]
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config: Dict[str, Any]
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task_id: str
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# Recon 阶段输出
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tech_stack: Dict[str, Any]
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entry_points: List[Dict[str, Any]]
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high_risk_areas: List[str]
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dependencies: Dict[str, Any]
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# Analysis 阶段输出
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findings: Annotated[List[Finding], operator.add] # 使用 add 合并多轮发现
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# Verification 阶段输出
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verified_findings: List[Finding]
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false_positives: List[str]
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# 控制流 - 🔥 关键：LLM 可以设置这些来影响路由
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current_phase: str
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iteration: int
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max_iterations: int
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should_continue_analysis: bool
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# 🔥 新增：LLM 的路由决策
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llm_next_action: Optional[str] # LLM 建议的下一步: "continue_analysis", "verify", "report", "end"
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llm_routing_reason: Optional[str] # LLM 的决策理由
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# 消息和事件
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messages: Annotated[List[Dict], operator.add]
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events: Annotated[List[Dict], operator.add]
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# 最终输出
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summary: Optional[Dict[str, Any]]
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security_score: Optional[int]
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error: Optional[str]
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# ============ LLM 路由决策器 ============
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class LLMRouter:
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"""
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LLM 路由决策器
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让 LLM 来决定下一步应该做什么
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"""
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def __init__(self, llm_service):
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self.llm_service = llm_service
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async def decide_after_recon(self, state: AuditState) -> Dict[str, Any]:
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"""Recon 后让 LLM 决定下一步"""
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entry_points = state.get("entry_points", [])
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high_risk_areas = state.get("high_risk_areas", [])
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tech_stack = state.get("tech_stack", {})
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initial_findings = state.get("findings", [])
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prompt = f"""作为安全审计的决策者，基于以下信息收集结果，决定下一步行动。
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## 信息收集结果
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- 入口点数量: {len(entry_points)}
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- 高风险区域: {high_risk_areas[:10]}
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- 技术栈: {tech_stack}
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- 初步发现: {len(initial_findings)} 个
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## 选项
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1. "analysis" - 继续进行漏洞分析（推荐：有入口点或高风险区域时）
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2. "end" - 结束审计（仅当没有任何可分析内容时）
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请返回 JSON 格式：
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{{"action": "analysis或end", "reason": "决策理由"}}"""
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try:
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response = await self.llm_service.chat_completion_raw(
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messages=[
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{"role": "system", "content": "你是安全审计流程的决策者，负责决定下一步行动。"},
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{"role": "user", "content": prompt},
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],
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temperature=0.1,
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max_tokens=200,
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)
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content = response.get("content", "")
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# 提取 JSON
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import re
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json_match = re.search(r'\{.*\}', content, re.DOTALL)
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if json_match:
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result = json.loads(json_match.group())
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return result
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except Exception as e:
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logger.warning(f"LLM routing decision failed: {e}")
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# 默认决策
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if entry_points or high_risk_areas:
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return {"action": "analysis", "reason": "有可分析内容"}
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return {"action": "end", "reason": "没有发现入口点或高风险区域"}
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async def decide_after_analysis(self, state: AuditState) -> Dict[str, Any]:
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"""Analysis 后让 LLM 决定下一步"""
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findings = state.get("findings", [])
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iteration = state.get("iteration", 0)
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max_iterations = state.get("max_iterations", 3)
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# 统计发现
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severity_counts = {"critical": 0, "high": 0, "medium": 0, "low": 0}
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for f in findings:
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sev = f.get("severity", "medium")
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severity_counts[sev] = severity_counts.get(sev, 0) + 1
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prompt = f"""作为安全审计的决策者，基于以下分析结果，决定下一步行动。
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## 分析结果
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- 总发现数: {len(findings)}
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- 严重程度分布: {severity_counts}
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- 当前迭代: {iteration}/{max_iterations}
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## 选项
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1. "verification" - 验证发现的漏洞（推荐：有发现需要验证时）
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2. "analysis" - 继续深入分析（推荐：发现较少但还有迭代次数时）
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3. "report" - 生成报告（推荐：没有发现或已充分分析时）
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请返回 JSON 格式：
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{{"action": "verification/analysis/report", "reason": "决策理由"}}"""
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try:
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response = await self.llm_service.chat_completion_raw(
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messages=[
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{"role": "system", "content": "你是安全审计流程的决策者，负责决定下一步行动。"},
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{"role": "user", "content": prompt},
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],
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temperature=0.1,
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max_tokens=200,
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)
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content = response.get("content", "")
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import re
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json_match = re.search(r'\{.*\}', content, re.DOTALL)
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if json_match:
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result = json.loads(json_match.group())
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return result
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except Exception as e:
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logger.warning(f"LLM routing decision failed: {e}")
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# 默认决策
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if not findings:
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return {"action": "report", "reason": "没有发现漏洞"}
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if len(findings) >= 3 or iteration >= max_iterations:
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return {"action": "verification", "reason": "有足够的发现需要验证"}
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return {"action": "analysis", "reason": "发现较少，继续分析"}
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async def decide_after_verification(self, state: AuditState) -> Dict[str, Any]:
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"""Verification 后让 LLM 决定下一步"""
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verified_findings = state.get("verified_findings", [])
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false_positives = state.get("false_positives", [])
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iteration = state.get("iteration", 0)
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max_iterations = state.get("max_iterations", 3)
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prompt = f"""作为安全审计的决策者，基于以下验证结果，决定下一步行动。
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## 验证结果
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- 已确认漏洞: {len(verified_findings)}
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- 误报数量: {len(false_positives)}
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- 当前迭代: {iteration}/{max_iterations}
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## 选项
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1. "analysis" - 回到分析阶段重新分析（推荐：误报率太高时）
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2. "report" - 生成最终报告（推荐：验证完成时）
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请返回 JSON 格式：
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{{"action": "analysis/report", "reason": "决策理由"}}"""
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try:
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response = await self.llm_service.chat_completion_raw(
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messages=[
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{"role": "system", "content": "你是安全审计流程的决策者，负责决定下一步行动。"},
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{"role": "user", "content": prompt},
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],
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temperature=0.1,
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max_tokens=200,
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)
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content = response.get("content", "")
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import re
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json_match = re.search(r'\{.*\}', content, re.DOTALL)
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if json_match:
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result = json.loads(json_match.group())
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return result
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except Exception as e:
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logger.warning(f"LLM routing decision failed: {e}")
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# 默认决策
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if len(false_positives) > len(verified_findings) and iteration < max_iterations:
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return {"action": "analysis", "reason": "误报率较高，需要重新分析"}
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return {"action": "report", "reason": "验证完成，生成报告"}
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# ============ 路由函数 (结合 LLM 决策) ============
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def route_after_recon(state: AuditState) -> Literal["analysis", "end"]:
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"""
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Recon 后的路由决策
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优先使用 LLM 的决策，否则使用默认逻辑
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"""
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# 检查 LLM 是否有决策
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llm_action = state.get("llm_next_action")
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if llm_action:
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logger.info(f"Using LLM routing decision: {llm_action}, reason: {state.get('llm_routing_reason')}")
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if llm_action == "end":
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return "end"
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return "analysis"
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# 默认逻辑（作为 fallback）
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if not state.get("entry_points") and not state.get("high_risk_areas"):
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return "end"
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return "analysis"
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def route_after_analysis(state: AuditState) -> Literal["verification", "analysis", "report"]:
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"""
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Analysis 后的路由决策
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优先使用 LLM 的决策
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"""
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# 检查 LLM 是否有决策
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llm_action = state.get("llm_next_action")
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if llm_action:
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logger.info(f"Using LLM routing decision: {llm_action}, reason: {state.get('llm_routing_reason')}")
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if llm_action == "verification":
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return "verification"
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elif llm_action == "analysis":
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return "analysis"
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elif llm_action == "report":
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return "report"
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# 默认逻辑
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findings = state.get("findings", [])
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iteration = state.get("iteration", 0)
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max_iterations = state.get("max_iterations", 3)
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should_continue = state.get("should_continue_analysis", False)
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if not findings:
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return "report"
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if should_continue and iteration < max_iterations:
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return "analysis"
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return "verification"
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def route_after_verification(state: AuditState) -> Literal["analysis", "report"]:
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"""
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Verification 后的路由决策
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优先使用 LLM 的决策
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"""
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# 检查 LLM 是否有决策
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llm_action = state.get("llm_next_action")
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if llm_action:
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logger.info(f"Using LLM routing decision: {llm_action}, reason: {state.get('llm_routing_reason')}")
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if llm_action == "analysis":
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return "analysis"
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return "report"
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# 默认逻辑
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false_positives = state.get("false_positives", [])
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iteration = state.get("iteration", 0)
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max_iterations = state.get("max_iterations", 3)
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if len(false_positives) > len(state.get("verified_findings", [])) and iteration < max_iterations:
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return "analysis"
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return "report"
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# ============ 创建审计图 ============
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def create_audit_graph(
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recon_node,
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analysis_node,
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verification_node,
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report_node,
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checkpointer: Optional[MemorySaver] = None,
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llm_service=None, # 用于 LLM 路由决策
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) -> StateGraph:
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"""
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创建审计工作流图
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Args:
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recon_node: 信息收集节点
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analysis_node: 漏洞分析节点
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verification_node: 漏洞验证节点
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report_node: 报告生成节点
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checkpointer: 检查点存储器
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llm_service: LLM 服务（用于路由决策）
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Returns:
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编译后的 StateGraph
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工作流结构:
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START
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│
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▼
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┌──────┐
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│Recon │ 信息收集 (LLM 驱动)
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└──┬───┘
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│ LLM 决定
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▼
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┌──────────┐
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│ Analysis │◄─────┐ 漏洞分析 (LLM 驱动，可循环)
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└────┬─────┘ │
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│ LLM 决定 │
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▼ │
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┌────────────┐ │
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│Verification│────┘ 漏洞验证 (LLM 驱动，可回溯)
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└─────┬──────┘
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│ LLM 决定
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▼
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┌──────────┐
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│ Report │ 报告生成
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└────┬─────┘
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│
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▼
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END
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"""
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# 创建状态图
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workflow = StateGraph(AuditState)
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# 如果有 LLM 服务，创建路由决策器
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llm_router = LLMRouter(llm_service) if llm_service else None
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# 包装节点以添加 LLM 路由决策
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async def recon_with_routing(state):
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result = await recon_node(state)
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# LLM 决定下一步
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if llm_router:
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decision = await llm_router.decide_after_recon({**state, **result})
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result["llm_next_action"] = decision.get("action")
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result["llm_routing_reason"] = decision.get("reason")
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return result
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async def analysis_with_routing(state):
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result = await analysis_node(state)
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# LLM 决定下一步
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if llm_router:
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decision = await llm_router.decide_after_analysis({**state, **result})
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result["llm_next_action"] = decision.get("action")
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result["llm_routing_reason"] = decision.get("reason")
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return result
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async def verification_with_routing(state):
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result = await verification_node(state)
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# LLM 决定下一步
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if llm_router:
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decision = await llm_router.decide_after_verification({**state, **result})
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result["llm_next_action"] = decision.get("action")
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result["llm_routing_reason"] = decision.get("reason")
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return result
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# 添加节点
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if llm_router:
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workflow.add_node("recon", recon_with_routing)
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workflow.add_node("analysis", analysis_with_routing)
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workflow.add_node("verification", verification_with_routing)
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else:
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workflow.add_node("recon", recon_node)
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workflow.add_node("analysis", analysis_node)
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workflow.add_node("verification", verification_node)
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workflow.add_node("report", report_node)
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# 设置入口点
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workflow.set_entry_point("recon")
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# 添加条件边
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workflow.add_conditional_edges(
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"recon",
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route_after_recon,
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{
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"analysis": "analysis",
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"end": END,
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}
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)
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workflow.add_conditional_edges(
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"analysis",
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route_after_analysis,
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{
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"verification": "verification",
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"analysis": "analysis",
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"report": "report",
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}
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)
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workflow.add_conditional_edges(
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"verification",
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route_after_verification,
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{
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"analysis": "analysis",
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"report": "report",
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}
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)
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# Report -> END
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workflow.add_edge("report", END)
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# 编译图
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if checkpointer:
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return workflow.compile(checkpointer=checkpointer)
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else:
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return workflow.compile()
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# ============ 带人机协作的审计图 ============
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def create_audit_graph_with_human(
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recon_node,
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analysis_node,
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verification_node,
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report_node,
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human_review_node,
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checkpointer: Optional[MemorySaver] = None,
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llm_service=None,
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) -> StateGraph:
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"""
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创建带人机协作的审计工作流图
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在验证阶段后增加人工审核节点
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"""
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workflow = StateGraph(AuditState)
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llm_router = LLMRouter(llm_service) if llm_service else None
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# 包装节点
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async def recon_with_routing(state):
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result = await recon_node(state)
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if llm_router:
|
||
decision = await llm_router.decide_after_recon({**state, **result})
|
||
result["llm_next_action"] = decision.get("action")
|
||
result["llm_routing_reason"] = decision.get("reason")
|
||
return result
|
||
|
||
async def analysis_with_routing(state):
|
||
result = await analysis_node(state)
|
||
if llm_router:
|
||
decision = await llm_router.decide_after_analysis({**state, **result})
|
||
result["llm_next_action"] = decision.get("action")
|
||
result["llm_routing_reason"] = decision.get("reason")
|
||
return result
|
||
|
||
# 添加节点
|
||
if llm_router:
|
||
workflow.add_node("recon", recon_with_routing)
|
||
workflow.add_node("analysis", analysis_with_routing)
|
||
else:
|
||
workflow.add_node("recon", recon_node)
|
||
workflow.add_node("analysis", analysis_node)
|
||
|
||
workflow.add_node("verification", verification_node)
|
||
workflow.add_node("human_review", human_review_node)
|
||
workflow.add_node("report", report_node)
|
||
|
||
workflow.set_entry_point("recon")
|
||
|
||
workflow.add_conditional_edges(
|
||
"recon",
|
||
route_after_recon,
|
||
{"analysis": "analysis", "end": END}
|
||
)
|
||
|
||
workflow.add_conditional_edges(
|
||
"analysis",
|
||
route_after_analysis,
|
||
{
|
||
"verification": "verification",
|
||
"analysis": "analysis",
|
||
"report": "report",
|
||
}
|
||
)
|
||
|
||
# Verification -> Human Review
|
||
workflow.add_edge("verification", "human_review")
|
||
|
||
# Human Review 后的路由
|
||
def route_after_human(state: AuditState) -> Literal["analysis", "report"]:
|
||
if state.get("should_continue_analysis"):
|
||
return "analysis"
|
||
return "report"
|
||
|
||
workflow.add_conditional_edges(
|
||
"human_review",
|
||
route_after_human,
|
||
{"analysis": "analysis", "report": "report"}
|
||
)
|
||
|
||
workflow.add_edge("report", END)
|
||
|
||
if checkpointer:
|
||
return workflow.compile(checkpointer=checkpointer, interrupt_before=["human_review"])
|
||
else:
|
||
return workflow.compile()
|
||
|
||
|
||
# ============ 执行器 ============
|
||
|
||
class AuditGraphRunner:
|
||
"""
|
||
审计图执行器
|
||
封装 LangGraph 工作流的执行
|
||
"""
|
||
|
||
def __init__(
|
||
self,
|
||
graph: StateGraph,
|
||
event_emitter=None,
|
||
):
|
||
self.graph = graph
|
||
self.event_emitter = event_emitter
|
||
|
||
async def run(
|
||
self,
|
||
project_root: str,
|
||
project_info: Dict[str, Any],
|
||
config: Dict[str, Any],
|
||
task_id: str,
|
||
) -> Dict[str, Any]:
|
||
"""
|
||
执行审计工作流
|
||
"""
|
||
# 初始状态
|
||
initial_state: AuditState = {
|
||
"project_root": project_root,
|
||
"project_info": project_info,
|
||
"config": config,
|
||
"task_id": task_id,
|
||
"tech_stack": {},
|
||
"entry_points": [],
|
||
"high_risk_areas": [],
|
||
"dependencies": {},
|
||
"findings": [],
|
||
"verified_findings": [],
|
||
"false_positives": [],
|
||
"current_phase": "start",
|
||
"iteration": 0,
|
||
"max_iterations": config.get("max_iterations", 3),
|
||
"should_continue_analysis": False,
|
||
"llm_next_action": None,
|
||
"llm_routing_reason": None,
|
||
"messages": [],
|
||
"events": [],
|
||
"summary": None,
|
||
"security_score": None,
|
||
"error": None,
|
||
}
|
||
|
||
run_config = {
|
||
"configurable": {
|
||
"thread_id": task_id,
|
||
}
|
||
}
|
||
|
||
try:
|
||
async for event in self.graph.astream(initial_state, config=run_config):
|
||
if self.event_emitter:
|
||
for node_name, node_state in event.items():
|
||
await self.event_emitter.emit_info(
|
||
f"节点 {node_name} 完成"
|
||
)
|
||
|
||
# 发射 LLM 路由决策事件
|
||
if node_state.get("llm_routing_reason"):
|
||
await self.event_emitter.emit_info(
|
||
f"🧠 LLM 决策: {node_state.get('llm_next_action')} - {node_state.get('llm_routing_reason')}"
|
||
)
|
||
|
||
if node_name == "analysis" and node_state.get("findings"):
|
||
new_findings = node_state["findings"]
|
||
await self.event_emitter.emit_info(
|
||
f"发现 {len(new_findings)} 个潜在漏洞"
|
||
)
|
||
|
||
final_state = self.graph.get_state(run_config)
|
||
return final_state.values
|
||
|
||
except Exception as e:
|
||
logger.error(f"Graph execution failed: {e}", exc_info=True)
|
||
raise
|
||
|
||
async def run_with_human_review(
|
||
self,
|
||
initial_state: AuditState,
|
||
human_feedback_callback,
|
||
) -> Dict[str, Any]:
|
||
"""带人机协作的执行"""
|
||
run_config = {
|
||
"configurable": {
|
||
"thread_id": initial_state["task_id"],
|
||
}
|
||
}
|
||
|
||
async for event in self.graph.astream(initial_state, config=run_config):
|
||
pass
|
||
|
||
current_state = self.graph.get_state(run_config)
|
||
|
||
if current_state.next == ("human_review",):
|
||
human_decision = await human_feedback_callback(current_state.values)
|
||
|
||
updated_state = {
|
||
**current_state.values,
|
||
"should_continue_analysis": human_decision.get("continue_analysis", False),
|
||
}
|
||
|
||
async for event in self.graph.astream(updated_state, config=run_config):
|
||
pass
|
||
|
||
return self.graph.get_state(run_config).values
|