rpki-com 0.1.0-alpha

// Aicent Stack | RPKI (Resource Public Key Infrastructure) 
// Domain: http://rpki.com
// Purpose: Intent Anomaly Classification & Heuristic Entropy Scoring.
// Specification: RFC-003 Standard (Active).
// License: Apache-2.0 via Aicent.com Organization.
//! # RFC-003: RPKI Intent Anomaly Classifier
//! 
//! This module implements the heuristic vanguard of the immune pipeline. 
//! It executes a micro-classifier on inbound RTTP pulse metadata utilizing 
//! 128-bit hardware atomicity to track pathogen evolution in real-time.

use rttp::PulseFrameHeader;
use crossbeam::atomic::AtomicCell; // 🛡️ 128-bit Sovereignty via AtomicCell
use std::time::Instant;

/// [RFC-003] Entropy Threshold for Anomaly Classification.
/// Defines the maximum allowable metadata deviation before a pulse is 
/// flagged as a potential pathogen (0.0 to 1.0).
pub const QUARANTINE_THRESHOLD: f32 = 0.95;

/// [RFC-003] Anomaly Manifold.
/// Tracks the security health of a GTIOT node using 128-bit atomics.
/// Packs [64-bit PathogenScore | 64-bit LastTriageTimestamp] to prevent 
/// audit-tearing during active security events.
pub struct AnomalyManifold {
    /// Hardware-locked 128-bit threat vector.
    pub audit_vector: AtomicCell<u128>,
}

impl AnomalyManifold {
    /// Initializes a new Anomaly Manifold with a zero-threat baseline.
    pub fn new() -> Self {
        Self {
            audit_vector: AtomicCell::new(0),
        }
    }

    /// Atomically updates the threat manifold with 128-bit precision.
    pub fn record_pathogen_event(&self, score: f64) {
        // [AUDIT] Utilizing CPU-level monotonic clock for nanosecond evidence.
        let ts = Instant::now().elapsed().as_nanos() as u64;
        let packed = ((score.to_bits() as u128) << 64) | (ts as u128);
        self.audit_vector.store(packed);
    }
}

/// [RFC-003] Intent Classification Logic.
/// Evaluates the 64-byte RTTP header for structural and temporal deviations.
/// 
/// [PERF] Designed for CPU L1 cache residency (approx. 8KB footprint) 
/// ensuring inference finality in <5µs.
pub fn classify_intent_stream(header: &PulseFrameHeader) -> (bool, f32) {
    let mut score: f32 = 0.0001; // Genesis Homeostasis baseline
    
    // Feature 1: Temporal Jitter Detection
    // Detecting potential path tampering via nanosecond clock drift.
    let local_now = Instant::now().elapsed().as_nanos() as u32;
    let drift = (local_now as i64 - header.timestamp_ns as i64).abs();
    
    if drift > 500_000 { // >500µs drift implies potential MITM interception
        score += 0.45;
    }

    // Feature 2: Priority Integrity Check
    // Flagging unauthorized attempts to hijack the Critical Quarantine tier (255).
    if header.priority == 255 && (header.flags & 0b1000 == 0) {
        score += 0.85;
    }

    let is_pathogen = score >= QUARANTINE_THRESHOLD;
    
    if is_pathogen {
        #[cfg(debug_assertions)]
        log_anomaly(&format!(
            "🚨 PATHOGEN CLASSIFIED | Score: {:.4} | Action: QUARANTINE", 
            score
        ));
    }

    (is_pathogen, score)
}

/// Internal high-fidelity logger for the RPKI anomaly classifier.
fn log_anomaly(msg: &str) {
    eprintln!("\x1b[1;31m[RPKI-ANOMALY]\x1b[0m 👁️ {}", msg);
}