# fedramp_access_control.py
"""
FedRAMP Access Control (AC) family implementation.
"""
 
from dataclasses import dataclass, field
from typing import Dict, List, Optional, Set
from datetime import datetime, timedelta
from enum import Enum
import hashlib
import secrets
import json
 
 
class ClearanceLevel(Enum):
    """Security clearance levels."""
    PUBLIC = 0
    CONTROLLED = 1
    SECRET = 2
    TOP_SECRET = 3
 
 
class AccessDecision(Enum):
    """Access control decision."""
    ALLOW = "allow"
    DENY = "deny"
    REQUIRE_MFA = "require_mfa"
    REQUIRE_APPROVAL = "require_approval"
 
 
@dataclass
class User:
    """User account with FedRAMP attributes."""
    user_id: str
    username: str
    email: str
    clearance_level: ClearanceLevel
    roles: Set[str]
    organization: str
    last_login: Optional[datetime]
    account_created: datetime
    account_expires: Optional[datetime]
    mfa_enabled: bool
    mfa_methods: List[str]
    training_completed: Dict[str, datetime]
    access_agreements: Dict[str, datetime]
    login_failures: int = 0
    locked_until: Optional[datetime] = None
 
 
@dataclass
class Resource:
    """Protected resource."""
    resource_id: str
    resource_type: str
    classification: ClearanceLevel
    required_roles: Set[str]
    required_training: List[str]
    requires_mfa: bool
    audit_all_access: bool
 
 
class FedRAMPAccessControl:
    """
    Implements FedRAMP Access Control family.
 
    Controls implemented:
    - AC-1: Policy and Procedures
    - AC-2: Account Management
    - AC-3: Access Enforcement
    - AC-4: Information Flow Enforcement
    - AC-5: Separation of Duties
    - AC-6: Least Privilege
    - AC-7: Unsuccessful Login Attempts
    - AC-8: System Use Notification
    - AC-11: Session Lock
    - AC-12: Session Termination
    - AC-17: Remote Access
    """
 
    # AC-7: Unsuccessful login attempt limits
    MAX_LOGIN_FAILURES = 3
    LOCKOUT_DURATION_MINUTES = 30
 
    # AC-11: Session lock timeout
    SESSION_LOCK_TIMEOUT = timedelta(minutes=15)
 
    # AC-12: Session termination
    MAX_SESSION_DURATION = timedelta(hours=8)
 
    def __init__(self, audit_logger):
        self.users: Dict[str, User] = {}
        self.resources: Dict[str, Resource] = {}
        self.sessions: Dict[str, dict] = {}
        self.audit = audit_logger
 
        # AC-5: Separation of duties matrix
        self.incompatible_roles: List[tuple] = [
            ("system_admin", "security_auditor"),
            ("developer", "production_deployer"),
            ("data_owner", "data_custodian"),
        ]
 
    def create_account(
        self,
        user_data: dict,
        created_by: str,
        justification: str
    ) -> User:
        """
        AC-2: Account Management - Create account with required attributes.
        """
        # Validate required fields
        required = ['username', 'email', 'clearance_level', 'roles', 'organization']
        for field in required:
            if field not in user_data:
                raise ValueError(f"Missing required field: {field}")
 
        # AC-5: Check for incompatible role combinations
        roles = set(user_data['roles'])
        for role1, role2 in self.incompatible_roles:
            if role1 in roles and role2 in roles:
                raise ValueError(f"Incompatible roles: {role1} and {role2}")
 
        user = User(
            user_id=f"USR-{secrets.token_hex(8)}",
            username=user_data['username'],
            email=user_data['email'],
            clearance_level=ClearanceLevel[user_data['clearance_level']],
            roles=roles,
            organization=user_data['organization'],
            last_login=None,
            account_created=datetime.utcnow(),
            account_expires=datetime.utcnow() + timedelta(days=365),
            mfa_enabled=False,
            mfa_methods=[],
            training_completed={},
            access_agreements={}
        )
 
        self.users[user.user_id] = user
 
        # Audit logging
        self.audit.log({
            'event_type': 'account_created',
            'user_id': user.user_id,
            'created_by': created_by,
            'justification': justification,
            'timestamp': datetime.utcnow().isoformat()
        })
 
        return user
 
    def check_access(
        self,
        user_id: str,
        resource_id: str,
        action: str,
        context: dict
    ) -> AccessDecision:
        """
        AC-3: Access Enforcement - Enforce access policy.
        """
        user = self.users.get(user_id)
        resource = self.resources.get(resource_id)
 
        if not user or not resource:
            self._audit_access_denied(user_id, resource_id, "invalid_user_or_resource")
            return AccessDecision.DENY
 
        # Check account status
        if user.locked_until and user.locked_until > datetime.utcnow():
            self._audit_access_denied(user_id, resource_id, "account_locked")
            return AccessDecision.DENY
 
        if user.account_expires and user.account_expires < datetime.utcnow():
            self._audit_access_denied(user_id, resource_id, "account_expired")
            return AccessDecision.DENY
 
        # AC-6: Least privilege - check clearance level
        if user.clearance_level.value < resource.classification.value:
            self._audit_access_denied(user_id, resource_id, "insufficient_clearance")
            return AccessDecision.DENY
 
        # Check role requirements
        if not user.roles.intersection(resource.required_roles):
            self._audit_access_denied(user_id, resource_id, "missing_role")
            return AccessDecision.DENY
 
        # Check training requirements
        for training in resource.required_training:
            if training not in user.training_completed:
                self._audit_access_denied(user_id, resource_id, f"missing_training:{training}")
                return AccessDecision.DENY
 
            # Check training currency (annual recertification)
            training_date = user.training_completed[training]
            if datetime.utcnow() - training_date > timedelta(days=365):
                self._audit_access_denied(user_id, resource_id, f"expired_training:{training}")
                return AccessDecision.DENY
 
        # AC-17: Remote access - require MFA
        if context.get('remote_access', False) or resource.requires_mfa:
            if not user.mfa_enabled:
                return AccessDecision.REQUIRE_MFA
 
        # Access granted
        self._audit_access_granted(user_id, resource_id, action)
        return AccessDecision.ALLOW
 
    def record_login_failure(self, user_id: str, source_ip: str):
        """
        AC-7: Unsuccessful Login Attempts.
        """
        user = self.users.get(user_id)
        if not user:
            return
 
        user.login_failures += 1
 
        self.audit.log({
            'event_type': 'login_failure',
            'user_id': user_id,
            'source_ip': source_ip,
            'failure_count': user.login_failures,
            'timestamp': datetime.utcnow().isoformat()
        })
 
        if user.login_failures >= self.MAX_LOGIN_FAILURES:
            user.locked_until = datetime.utcnow() + timedelta(
                minutes=self.LOCKOUT_DURATION_MINUTES
            )
 
            self.audit.log({
                'event_type': 'account_locked',
                'user_id': user_id,
                'reason': 'max_login_failures',
                'locked_until': user.locked_until.isoformat(),
                'timestamp': datetime.utcnow().isoformat()
            })
 
    def record_login_success(self, user_id: str, source_ip: str) -> str:
        """Record successful login and create session."""
        user = self.users.get(user_id)
        if not user:
            raise ValueError("User not found")
 
        user.login_failures = 0
        user.last_login = datetime.utcnow()
 
        # Create session
        session_id = secrets.token_urlsafe(32)
        self.sessions[session_id] = {
            'user_id': user_id,
            'created_at': datetime.utcnow(),
            'last_activity': datetime.utcnow(),
            'source_ip': source_ip,
            'locked': False
        }
 
        self.audit.log({
            'event_type': 'login_success',
            'user_id': user_id,
            'source_ip': source_ip,
            'session_id': session_id,
            'timestamp': datetime.utcnow().isoformat()
        })
 
        return session_id
 
    def check_session(self, session_id: str) -> tuple:
        """
        AC-11 & AC-12: Session management.
        """
        session = self.sessions.get(session_id)
        if not session:
            return False, "invalid_session"
 
        now = datetime.utcnow()
 
        # AC-12: Check maximum session duration
        if now - session['created_at'] > self.MAX_SESSION_DURATION:
            self._terminate_session(session_id, "max_duration_exceeded")
            return False, "session_expired"
 
        # AC-11: Check for session lock
        if now - session['last_activity'] > self.SESSION_LOCK_TIMEOUT:
            session['locked'] = True
            return False, "session_locked"
 
        if session['locked']:
            return False, "session_locked"
 
        # Update activity
        session['last_activity'] = now
        return True, "valid"
 
    def unlock_session(self, session_id: str, mfa_verified: bool) -> bool:
        """Unlock a locked session after MFA verification."""
        session = self.sessions.get(session_id)
        if not session:
            return False
 
        if not mfa_verified:
            return False
 
        session['locked'] = False
        session['last_activity'] = datetime.utcnow()
 
        self.audit.log({
            'event_type': 'session_unlocked',
            'session_id': session_id,
            'user_id': session['user_id'],
            'timestamp': datetime.utcnow().isoformat()
        })
 
        return True
 
    def _terminate_session(self, session_id: str, reason: str):
        """Terminate a session."""
        session = self.sessions.pop(session_id, None)
        if session:
            self.audit.log({
                'event_type': 'session_terminated',
                'session_id': session_id,
                'user_id': session['user_id'],
                'reason': reason,
                'timestamp': datetime.utcnow().isoformat()
            })
 
    def _audit_access_denied(self, user_id: str, resource_id: str, reason: str):
        """Log access denial."""
        self.audit.log({
            'event_type': 'access_denied',
            'user_id': user_id,
            'resource_id': resource_id,
            'reason': reason,
            'timestamp': datetime.utcnow().isoformat()
        })
 
    def _audit_access_granted(self, user_id: str, resource_id: str, action: str):
        """Log access grant."""
        self.audit.log({
            'event_type': 'access_granted',
            'user_id': user_id,
            'resource_id': resource_id,
            'action': action,
            'timestamp': datetime.utcnow().isoformat()
        })
 
    def get_system_use_notification(self) -> str:
        """
        AC-8: System Use Notification.
        """
        return """
        *******************************************************************************
        *                        U.S. GOVERNMENT SYSTEM                               *
        *******************************************************************************
 
        This is a U.S. Government information system. This system is provided for
        authorized use only. By using this system, you acknowledge that:
 
        1. You have no reasonable expectation of privacy regarding any communication
           or data transiting or stored on this system.
 
        2. At any time, and for any lawful Government purpose, the Government may
           monitor, intercept, and search any communication or data transiting or
           stored on this system.
 
        3. Any communication or data transiting or stored on this system may be
           disclosed or used for any lawful Government purpose.
 
        4. Unauthorized use of this system is prohibited and may be subject to
           criminal and civil penalties.
 
        By proceeding, you consent to these terms.
        *******************************************************************************
        """

# fedramp_audit.py
"""
FedRAMP Audit and Accountability (AU) family implementation.
"""
 
from dataclasses import dataclass
from typing import Dict, List, Optional, Any
from datetime import datetime, timedelta
from enum import Enum
import json
import hashlib
import gzip
import os
 
 
class AuditEventType(Enum):
    """Types of auditable events per AU-2."""
    LOGIN_SUCCESS = "login_success"
    LOGIN_FAILURE = "login_failure"
    LOGOUT = "logout"
    ACCESS_GRANTED = "access_granted"
    ACCESS_DENIED = "access_denied"
    PRIVILEGE_ESCALATION = "privilege_escalation"
    ADMIN_ACTION = "admin_action"
    SECURITY_CONFIG_CHANGE = "security_config_change"
    DATA_ACCESS = "data_access"
    DATA_MODIFICATION = "data_modification"
    DATA_DELETION = "data_deletion"
    SYSTEM_STARTUP = "system_startup"
    SYSTEM_SHUTDOWN = "system_shutdown"
    AUDIT_LOG_ACCESS = "audit_log_access"
 
 
@dataclass
class AuditRecord:
    """
    Audit record structure per AU-3.
 
    Required content:
    - Type of event
    - When the event occurred
    - Where the event occurred
    - Source of the event
    - Outcome of the event
    - Identity of individuals/subjects/objects
    """
    record_id: str
    event_type: AuditEventType
    timestamp: datetime
    source_system: str
    source_component: str
    source_ip: Optional[str]
    user_id: Optional[str]
    subject_type: str
    object_id: Optional[str]
    object_type: Optional[str]
    action: str
    outcome: str  # success, failure
    outcome_reason: Optional[str]
    additional_data: Dict[str, Any]
    integrity_hash: str
 
 
class FedRAMPAuditLogger:
    """
    Implements FedRAMP Audit family controls.
 
    Controls:
    - AU-2: Audit Events
    - AU-3: Content of Audit Records
    - AU-4: Audit Storage Capacity
    - AU-5: Response to Audit Processing Failures
    - AU-6: Audit Review, Analysis, and Reporting
    - AU-7: Audit Reduction and Report Generation
    - AU-8: Time Stamps
    - AU-9: Protection of Audit Information
    - AU-10: Non-repudiation
    - AU-11: Audit Record Retention
    - AU-12: Audit Generation
    """
 
    # AU-11: Retention period (minimum 90 days online, 1 year total)
    ONLINE_RETENTION_DAYS = 90
    TOTAL_RETENTION_DAYS = 365
 
    def __init__(
        self,
        storage_backend,
        alert_callback=None,
        backup_backend=None
    ):
        self.storage = storage_backend
        self.alert_callback = alert_callback
        self.backup_storage = backup_backend
 
        self.previous_hash = "0" * 64
        self.sequence_number = 0
        self.failed_writes = 0
        self.max_failed_writes = 5
 
    def log(self, event_data: dict) -> str:
        """
        AU-12: Audit Generation.
        """
        # AU-8: Add trusted timestamp
        timestamp = datetime.utcnow()
 
        record = AuditRecord(
            record_id=self._generate_record_id(),
            event_type=AuditEventType(event_data.get('event_type', 'admin_action')),
            timestamp=timestamp,
            source_system=event_data.get('source_system', 'unknown'),
            source_component=event_data.get('source_component', 'unknown'),
            source_ip=event_data.get('source_ip'),
            user_id=event_data.get('user_id'),
            subject_type=event_data.get('subject_type', 'user'),
            object_id=event_data.get('object_id'),
            object_type=event_data.get('object_type'),
            action=event_data.get('action', 'unknown'),
            outcome=event_data.get('outcome', 'success'),
            outcome_reason=event_data.get('outcome_reason'),
            additional_data=event_data.get('additional_data', {}),
            integrity_hash=""  # Will be set below
        )
 
        # AU-10: Non-repudiation - create integrity hash
        record.integrity_hash = self._calculate_integrity_hash(record)
 
        # AU-12: Write to audit log
        try:
            self._write_record(record)
            self.failed_writes = 0
        except Exception as e:
            self._handle_write_failure(record, e)
 
        return record.record_id
 
    def _write_record(self, record: AuditRecord):
        """Write audit record with integrity protection."""
        record_dict = {
            'record_id': record.record_id,
            'event_type': record.event_type.value,
            'timestamp': record.timestamp.isoformat(),
            'source_system': record.source_system,
            'source_component': record.source_component,
            'source_ip': record.source_ip,
            'user_id': record.user_id,
            'subject_type': record.subject_type,
            'object_id': record.object_id,
            'object_type': record.object_type,
            'action': record.action,
            'outcome': record.outcome,
            'outcome_reason': record.outcome_reason,
            'additional_data': record.additional_data,
            'integrity_hash': record.integrity_hash,
            'previous_hash': self.previous_hash,
            'sequence': self.sequence_number
        }
 
        self.storage.write(record_dict)
 
        # Update chain
        self.previous_hash = record.integrity_hash
        self.sequence_number += 1
 
        # AU-4: Check storage capacity
        self._check_storage_capacity()
 
    def _handle_write_failure(self, record: AuditRecord, error: Exception):
        """
        AU-5: Response to Audit Processing Failures.
        """
        self.failed_writes += 1
 
        # Try backup storage
        if self.backup_storage:
            try:
                self.backup_storage.write(record.__dict__)
            except:
                pass
 
        # Alert on failures
        if self.alert_callback:
            self.alert_callback({
                'alert_type': 'audit_write_failure',
                'record_id': record.record_id,
                'error': str(error),
                'failed_writes': self.failed_writes
            })
 
        # AU-5(2): Generate real-time alert for critical
        if self.failed_writes >= self.max_failed_writes:
            if self.alert_callback:
                self.alert_callback({
                    'alert_type': 'audit_system_critical',
                    'message': 'Audit logging has failed multiple times',
                    'failed_writes': self.failed_writes,
                    'severity': 'critical'
                })
 
    def _calculate_integrity_hash(self, record: AuditRecord) -> str:
        """
        AU-9 & AU-10: Protect audit information and ensure non-repudiation.
        """
        data_to_hash = json.dumps({
            'record_id': record.record_id,
            'event_type': record.event_type.value,
            'timestamp': record.timestamp.isoformat(),
            'user_id': record.user_id,
            'action': record.action,
            'outcome': record.outcome,
            'previous_hash': self.previous_hash,
            'sequence': self.sequence_number
        }, sort_keys=True)
 
        return hashlib.sha256(data_to_hash.encode()).hexdigest()
 
    def _check_storage_capacity(self):
        """
        AU-4: Audit Storage Capacity monitoring.
        """
        capacity = self.storage.get_capacity()
 
        if capacity['used_percent'] > 90:
            if self.alert_callback:
                self.alert_callback({
                    'alert_type': 'audit_storage_warning',
                    'used_percent': capacity['used_percent'],
                    'severity': 'warning'
                })
 
        if capacity['used_percent'] > 95:
            # Archive old records
            self._archive_old_records()
 
    def _archive_old_records(self):
        """Archive records older than online retention."""
        cutoff = datetime.utcnow() - timedelta(days=self.ONLINE_RETENTION_DAYS)
        old_records = self.storage.get_records_before(cutoff)
 
        if self.backup_storage:
            for record in old_records:
                self.backup_storage.archive(record)
 
            self.storage.delete_records_before(cutoff)
 
    def verify_integrity(self, start_sequence: int = 0) -> dict:
        """
        AU-9: Verify audit log integrity.
        """
        records = self.storage.get_all_records(start_sequence)
        issues = []
 
        prev_hash = "0" * 64 if start_sequence == 0 else None
        prev_seq = start_sequence - 1
 
        for record in records:
            # Verify sequence
            if record['sequence'] != prev_seq + 1:
                issues.append({
                    'type': 'sequence_gap',
                    'expected': prev_seq + 1,
                    'found': record['sequence'],
                    'record_id': record['record_id']
                })
 
            # Verify chain
            if prev_hash and record.get('previous_hash') != prev_hash:
                issues.append({
                    'type': 'chain_break',
                    'record_id': record['record_id'],
                    'expected_prev': prev_hash,
                    'found_prev': record.get('previous_hash')
                })
 
            # Verify record hash
            expected_hash = self._recalculate_hash(record)
            if record['integrity_hash'] != expected_hash:
                issues.append({
                    'type': 'hash_mismatch',
                    'record_id': record['record_id']
                })
 
            prev_hash = record['integrity_hash']
            prev_seq = record['sequence']
 
        return {
            'verified': len(issues) == 0,
            'records_checked': len(records),
            'issues': issues
        }
 
    def _recalculate_hash(self, record: dict) -> str:
        """Recalculate hash for verification."""
        data_to_hash = json.dumps({
            'record_id': record['record_id'],
            'event_type': record['event_type'],
            'timestamp': record['timestamp'],
            'user_id': record['user_id'],
            'action': record['action'],
            'outcome': record['outcome'],
            'previous_hash': record['previous_hash'],
            'sequence': record['sequence']
        }, sort_keys=True)
 
        return hashlib.sha256(data_to_hash.encode()).hexdigest()
 
    def _generate_record_id(self) -> str:
        """Generate unique record ID."""
        import secrets
        return f"AUD-{datetime.utcnow().strftime('%Y%m%d')}-{secrets.token_hex(6)}"
 
    def search_records(
        self,
        filters: dict,
        start_date: Optional[datetime] = None,
        end_date: Optional[datetime] = None,
        limit: int = 1000
    ) -> List[dict]:
        """
        AU-7: Audit Reduction and Report Generation.
        """
        return self.storage.search(
            filters=filters,
            start_date=start_date,
            end_date=end_date,
            limit=limit
        )
 
    def generate_report(
        self,
        report_type: str,
        start_date: datetime,
        end_date: datetime
    ) -> dict:
        """
        AU-6: Audit Review, Analysis, and Reporting.
        """
        records = self.search_records(
            filters={},
            start_date=start_date,
            end_date=end_date,
            limit=100000
        )
 
        report = {
            'report_type': report_type,
            'generated_at': datetime.utcnow().isoformat(),
            'period': {
                'start': start_date.isoformat(),
                'end': end_date.isoformat()
            },
            'total_events': len(records),
            'events_by_type': {},
            'events_by_outcome': {'success': 0, 'failure': 0},
            'unique_users': set(),
            'anomalies': []
        }
 
        for record in records:
            event_type = record.get('event_type', 'unknown')
            report['events_by_type'][event_type] = report['events_by_type'].get(event_type, 0) + 1
 
            outcome = record.get('outcome', 'unknown')
            if outcome in report['events_by_outcome']:
                report['events_by_outcome'][outcome] += 1
 
            if record.get('user_id'):
                report['unique_users'].add(record['user_id'])
 
        report['unique_users'] = len(report['unique_users'])
 
        # Detect anomalies
        failure_rate = report['events_by_outcome']['failure'] / max(report['total_events'], 1)
        if failure_rate > 0.1:
            report['anomalies'].append({
                'type': 'high_failure_rate',
                'value': failure_rate,
                'threshold': 0.1
            })
 
        return report

# continuous_monitoring.py
"""
FedRAMP Continuous Monitoring implementation.
"""
 
from dataclasses import dataclass
from typing import Dict, List, Optional
from datetime import datetime, timedelta
from enum import Enum
 
 
class MonitoringFrequency(Enum):
    CONTINUOUS = "continuous"
    DAILY = "daily"
    WEEKLY = "weekly"
    MONTHLY = "monthly"
    QUARTERLY = "quarterly"
    ANNUAL = "annual"
 
 
@dataclass
class ControlAssessment:
    """Assessment result for a security control."""
    control_id: str
    assessment_date: datetime
    status: str  # satisfied, partially_satisfied, not_satisfied
    findings: List[str]
    evidence: List[str]
    assessor: str
    next_assessment: datetime
 
 
class ContinuousMonitoring:
    """
    Implements FedRAMP Continuous Monitoring requirements.
    """
 
    # Assessment frequencies by control family
    ASSESSMENT_SCHEDULE = {
        'AC': MonitoringFrequency.MONTHLY,   # Access Control
        'AU': MonitoringFrequency.MONTHLY,   # Audit
        'CA': MonitoringFrequency.ANNUAL,    # Assessment
        'CM': MonitoringFrequency.MONTHLY,   # Configuration
        'CP': MonitoringFrequency.ANNUAL,    # Contingency Planning
        'IA': MonitoringFrequency.MONTHLY,   # Identification/Auth
        'IR': MonitoringFrequency.QUARTERLY, # Incident Response
        'MA': MonitoringFrequency.QUARTERLY, # Maintenance
        'MP': MonitoringFrequency.QUARTERLY, # Media Protection
        'PE': MonitoringFrequency.ANNUAL,    # Physical
        'PL': MonitoringFrequency.ANNUAL,    # Planning
        'PS': MonitoringFrequency.QUARTERLY, # Personnel
        'RA': MonitoringFrequency.QUARTERLY, # Risk Assessment
        'SA': MonitoringFrequency.ANNUAL,    # System Acquisition
        'SC': MonitoringFrequency.MONTHLY,   # System Communications
        'SI': MonitoringFrequency.MONTHLY,   # System Integrity
    }
 
    def __init__(self, conmon_storage, alert_service):
        self.storage = conmon_storage
        self.alerts = alert_service
        self.assessments: Dict[str, ControlAssessment] = {}
 
    def assess_control(
        self,
        control_id: str,
        assessor: str,
        evidence: List[str]
    ) -> ControlAssessment:
        """Perform control assessment."""
        control_family = control_id.split('-')[0]
        frequency = self.ASSESSMENT_SCHEDULE.get(control_family, MonitoringFrequency.QUARTERLY)
 
        # Run automated checks
        findings = self._run_automated_checks(control_id)
 
        # Determine status
        if not findings:
            status = "satisfied"
        elif any(f.get('severity') == 'high' for f in findings):
            status = "not_satisfied"
        else:
            status = "partially_satisfied"
 
        assessment = ControlAssessment(
            control_id=control_id,
            assessment_date=datetime.utcnow(),
            status=status,
            findings=[f['description'] for f in findings],
            evidence=evidence,
            assessor=assessor,
            next_assessment=self._calculate_next_assessment(frequency)
        )
 
        self.assessments[control_id] = assessment
        self.storage.save_assessment(assessment)
 
        # Generate POA&M items for findings
        if status != "satisfied":
            self._create_poam_items(control_id, findings)
 
        return assessment
 
    def _run_automated_checks(self, control_id: str) -> List[dict]:
        """Run automated security checks for a control."""
        findings = []
 
        # Example checks by control
        if control_id.startswith('AC-2'):
            findings.extend(self._check_account_management())
        elif control_id.startswith('AC-7'):
            findings.extend(self._check_login_lockout())
        elif control_id.startswith('AU-'):
            findings.extend(self._check_audit_logging())
        elif control_id.startswith('CM-'):
            findings.extend(self._check_configuration_management())
        elif control_id.startswith('SI-'):
            findings.extend(self._check_system_integrity())
 
        return findings
 
    def _check_account_management(self) -> List[dict]:
        """AC-2 automated checks."""
        findings = []
 
        # Check for inactive accounts
        inactive_threshold = datetime.utcnow() - timedelta(days=90)
        # Would query user database
        inactive_count = 0  # Placeholder
 
        if inactive_count > 0:
            findings.append({
                'description': f'{inactive_count} accounts inactive for >90 days',
                'severity': 'medium',
                'control': 'AC-2(3)'
            })
 
        return findings
 
    def _check_login_lockout(self) -> List[dict]:
        """AC-7 automated checks."""
        findings = []
        # Check lockout configuration
        return findings
 
    def _check_audit_logging(self) -> List[dict]:
        """AU family automated checks."""
        findings = []
        # Verify audit logging is operational
        return findings
 
    def _check_configuration_management(self) -> List[dict]:
        """CM family automated checks."""
        findings = []
        # Check for configuration drift
        return findings
 
    def _check_system_integrity(self) -> List[dict]:
        """SI family automated checks."""
        findings = []
        # Check for vulnerabilities, malware
        return findings
 
    def _calculate_next_assessment(self, frequency: MonitoringFrequency) -> datetime:
        """Calculate next assessment date."""
        now = datetime.utcnow()
 
        if frequency == MonitoringFrequency.CONTINUOUS:
            return now + timedelta(hours=1)
        elif frequency == MonitoringFrequency.DAILY:
            return now + timedelta(days=1)
        elif frequency == MonitoringFrequency.WEEKLY:
            return now + timedelta(weeks=1)
        elif frequency == MonitoringFrequency.MONTHLY:
            return now + timedelta(days=30)
        elif frequency == MonitoringFrequency.QUARTERLY:
            return now + timedelta(days=90)
        else:  # ANNUAL
            return now + timedelta(days=365)
 
    def _create_poam_items(self, control_id: str, findings: List[dict]):
        """Create POA&M items for findings."""
        for finding in findings:
            self.storage.create_poam({
                'control_id': control_id,
                'weakness': finding['description'],
                'severity': finding['severity'],
                'identified_date': datetime.utcnow().isoformat(),
                'status': 'open'
            })
 
    def generate_conmon_report(self) -> dict:
        """Generate monthly continuous monitoring report."""
        return {
            'report_period': {
                'start': (datetime.utcnow() - timedelta(days=30)).isoformat(),
                'end': datetime.utcnow().isoformat()
            },
            'control_status': self._summarize_control_status(),
            'vulnerability_summary': self._get_vulnerability_summary(),
            'poam_summary': self._get_poam_summary(),
            'significant_changes': self._get_significant_changes(),
            'incidents': self._get_incident_summary()
        }
 
    def _summarize_control_status(self) -> dict:
        """Summarize control assessment status."""
        summary = {'satisfied': 0, 'partially_satisfied': 0, 'not_satisfied': 0}
        for assessment in self.assessments.values():
            summary[assessment.status] = summary.get(assessment.status, 0) + 1
        return summary
 
    def _get_vulnerability_summary(self) -> dict:
        """Get vulnerability scan summary."""
        return {
            'critical': 0,
            'high': 0,
            'medium': 0,
            'low': 0,
            'scan_date': datetime.utcnow().isoformat()
        }
 
    def _get_poam_summary(self) -> dict:
        """Get POA&M status summary."""
        return {
            'open': 0,
            'in_progress': 0,
            'closed_this_period': 0,
            'overdue': 0
        }
 
    def _get_significant_changes(self) -> List[dict]:
        """Get significant system changes."""
        return []
 
    def _get_incident_summary(self) -> dict:
        """Get security incident summary."""
        return {
            'total_incidents': 0,
            'by_severity': {}
        }