Spaces:
Configuration error
Configuration error
File size: 11,582 Bytes
65e15b5 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 |
"""
monitors/audit_monitor.py - Audit trail and compliance monitoring
"""
import json
from typing import Dict, List, Optional, Any, Set
from dataclasses import dataclass
from datetime import datetime, timedelta
from enum import Enum
import threading
from pathlib import Path
from collections import defaultdict
from ..core.logger import SecurityLogger
from ..core.exceptions import MonitoringError
class AuditEventType(Enum):
# Authentication events
LOGIN = "login"
LOGOUT = "logout"
AUTH_FAILURE = "auth_failure"
# Access events
ACCESS_GRANTED = "access_granted"
ACCESS_DENIED = "access_denied"
PERMISSION_CHANGE = "permission_change"
# Data events
DATA_ACCESS = "data_access"
DATA_MODIFICATION = "data_modification"
DATA_DELETION = "data_deletion"
# System events
CONFIG_CHANGE = "config_change"
SYSTEM_ERROR = "system_error"
SECURITY_ALERT = "security_alert"
# Model events
MODEL_ACCESS = "model_access"
MODEL_UPDATE = "model_update"
PROMPT_INJECTION = "prompt_injection"
# Compliance events
COMPLIANCE_CHECK = "compliance_check"
POLICY_VIOLATION = "policy_violation"
DATA_BREACH = "data_breach"
@dataclass
class AuditEvent:
"""Representation of an audit event"""
event_type: AuditEventType
timestamp: datetime
user_id: str
action: str
resource: str
status: str
details: Dict[str, Any]
metadata: Optional[Dict[str, Any]] = None
session_id: Optional[str] = None
ip_address: Optional[str] = None
@dataclass
class CompliancePolicy:
"""Definition of a compliance policy"""
name: str
description: str
required_events: Set[AuditEventType]
retention_period: timedelta
alert_threshold: int
class AuditMonitor:
def __init__(self, security_logger: Optional[SecurityLogger] = None,
audit_dir: Optional[str] = None):
self.security_logger = security_logger
self.audit_dir = Path(audit_dir) if audit_dir else Path.home() / ".llmguardian" / "audit"
self.events: List[AuditEvent] = []
self.policies = self._initialize_policies()
self.compliance_status = defaultdict(list)
self._lock = threading.Lock()
self._setup_audit_directory()
def _setup_audit_directory(self):
"""Set up audit directory and ensure it exists"""
try:
self.audit_dir.mkdir(parents=True, exist_ok=True)
(self.audit_dir / "events").mkdir(exist_ok=True)
(self.audit_dir / "reports").mkdir(exist_ok=True)
except Exception as e:
raise MonitoringError(f"Failed to setup audit directory: {str(e)}")
def _initialize_policies(self) -> Dict[str, CompliancePolicy]:
"""Initialize default compliance policies"""
return {
"data_access_tracking": CompliancePolicy(
name="Data Access Tracking",
description="Track all data access events",
required_events={
AuditEventType.DATA_ACCESS,
AuditEventType.DATA_MODIFICATION,
AuditEventType.DATA_DELETION
},
retention_period=timedelta(days=90),
alert_threshold=5
),
"authentication_monitoring": CompliancePolicy(
name="Authentication Monitoring",
description="Monitor authentication events",
required_events={
AuditEventType.LOGIN,
AuditEventType.LOGOUT,
AuditEventType.AUTH_FAILURE
},
retention_period=timedelta(days=30),
alert_threshold=3
),
"security_compliance": CompliancePolicy(
name="Security Compliance",
description="Monitor security-related events",
required_events={
AuditEventType.SECURITY_ALERT,
AuditEventType.PROMPT_INJECTION,
AuditEventType.DATA_BREACH
},
retention_period=timedelta(days=365),
alert_threshold=1
)
}
def log_event(self, event: AuditEvent):
"""Log an audit event"""
try:
with self._lock:
self.events.append(event)
self._write_event_to_file(event)
self._check_compliance(event)
if self.security_logger:
self.security_logger.log_security_event(
"audit_event_logged",
event_type=event.event_type.value,
user_id=event.user_id,
action=event.action
)
except Exception as e:
if self.security_logger:
self.security_logger.log_security_event(
"audit_logging_error",
error=str(e)
)
raise MonitoringError(f"Failed to log audit event: {str(e)}")
def _write_event_to_file(self, event: AuditEvent):
"""Write event to audit file"""
try:
timestamp = event.timestamp.strftime("%Y%m%d")
file_path = self.audit_dir / "events" / f"audit_{timestamp}.jsonl"
event_data = {
"event_type": event.event_type.value,
"timestamp": event.timestamp.isoformat(),
"user_id": event.user_id,
"action": event.action,
"resource": event.resource,
"status": event.status,
"details": event.details,
"metadata": event.metadata,
"session_id": event.session_id,
"ip_address": event.ip_address
}
with open(file_path, 'a') as f:
f.write(json.dumps(event_data) + '\n')
except Exception as e:
raise MonitoringError(f"Failed to write audit event: {str(e)}")
def _check_compliance(self, event: AuditEvent):
"""Check event against compliance policies"""
for policy_name, policy in self.policies.items():
if event.event_type in policy.required_events:
self.compliance_status[policy_name].append(event)
# Check for violations
recent_events = [
e for e in self.compliance_status[policy_name]
if datetime.utcnow() - e.timestamp < timedelta(hours=24)
]
if len(recent_events) >= policy.alert_threshold:
if self.security_logger:
self.security_logger.log_security_event(
"compliance_threshold_exceeded",
policy=policy_name,
events_count=len(recent_events)
)
def get_events(self,
event_type: Optional[AuditEventType] = None,
start_time: Optional[datetime] = None,
end_time: Optional[datetime] = None,
user_id: Optional[str] = None) -> List[Dict[str, Any]]:
"""Get filtered audit events"""
with self._lock:
events = self.events
if event_type:
events = [e for e in events if e.event_type == event_type]
if start_time:
events = [e for e in events if e.timestamp >= start_time]
if end_time:
events = [e for e in events if e.timestamp <= end_time]
if user_id:
events = [e for e in events if e.user_id == user_id]
return [
{
"event_type": e.event_type.value,
"timestamp": e.timestamp.isoformat(),
"user_id": e.user_id,
"action": e.action,
"resource": e.resource,
"status": e.status,
"details": e.details
}
for e in events
]
def generate_compliance_report(self, policy_name: str) -> Dict[str, Any]:
"""Generate compliance report for a specific policy"""
if policy_name not in self.policies:
raise MonitoringError(f"Unknown policy: {policy_name}")
policy = self.policies[policy_name]
events = self.compliance_status[policy_name]
report = {
"policy_name": policy.name,
"description": policy.description,
"generated_at": datetime.utcnow().isoformat(),
"total_events": len(events),
"events_by_type": defaultdict(int),
"violations": []
}
for event in events:
report["events_by_type"][event.event_type.value] += 1
# Check for missing required events
for required_event in policy.required_events:
if report["events_by_type"][required_event.value] == 0:
report["violations"].append(
f"Missing required event type: {required_event.value}"
)
report_path = self.audit_dir / "reports" / f"compliance_{policy_name}_{datetime.utcnow().strftime('%Y%m%d')}.json"
with open(report_path, 'w') as f:
json.dump(report, f, indent=2)
return report
def add_policy(self, name: str, policy: CompliancePolicy):
"""Add a new compliance policy"""
with self._lock:
self.policies[name] = policy
def remove_policy(self, name: str):
"""Remove a compliance policy"""
with self._lock:
self.policies.pop(name, None)
self.compliance_status.pop(name, None)
def clear_old_events(self):
"""Clear events older than retention period"""
with self._lock:
for policy in self.policies.values():
cutoff = datetime.utcnow() - policy.retention_period
self.events = [e for e in self.events if e.timestamp >= cutoff]
if policy.name in self.compliance_status:
self.compliance_status[policy.name] = [
e for e in self.compliance_status[policy.name]
if e.timestamp >= cutoff
]
def get_audit_statistics(self) -> Dict[str, Any]:
"""Get audit statistics"""
stats = {
"total_events": len(self.events),
"events_by_type": defaultdict(int),
"events_by_user": defaultdict(int),
"policy_status": {},
"recent_violations": []
}
for event in self.events:
stats["events_by_type"][event.event_type.value] += 1
stats["events_by_user"][event.user_id] += 1
for policy_name, policy in self.policies.items():
events = self.compliance_status[policy_name]
recent_events = [
e for e in events
if datetime.utcnow() - e.timestamp < timedelta(hours=24)
]
stats["policy_status"][policy_name] = {
"total_events": len(events),
"recent_events": len(recent_events),
"violation_threshold": policy.alert_threshold,
"status": "violation" if len(recent_events) >= policy.alert_threshold else "compliant"
}
return stats |