🛡️ Professional Security Framework for Symphony's Extension Infrastructure

How to build extension-based infrastructure [IaE] that meets enterprise security standards and passes security audits.

🎯 The Core Security Challenge

🔴 The Problem:

Extension Infrastructure = Larger Attack Surface
┌─────────────────────────────────────────┐
│  CONDUCTOR CORE                         │
│  ↕️ Extension API (Attack Vector 1)      │
│  📦 Pool Manager Extension              │
│  ↕️ Inter-Extension Communication       │ ← Attack Vector 2
│  📊 DAG Tracker Extension              │
│  ↕️ Extension API (Attack Vector 3)      │
│  📦 Artifact Store Extension           │
└─────────────────────────────────────────┘

Each boundary is a potential security vulnerability

🎯 Enterprise Security Requirements:

• 🏢 Zero Trust Architecture: Never trust, always verify
• 🛡️ Principle of Least Privilege: Minimal permissions only
• 🔒 Defense in Depth: Multiple security layers
• 📊 Audit Trail: Complete security logging
• 🔐 Cryptographic Verification: Signed, verified components
• 🏰 Isolation: Complete sandboxing of untrusted code

🏗️ Multi-Layer Security Architecture

🛡️ Layer 1: Extension Signing & Verification

📜 Code Signing Infrastructure

// Enterprise-grade extension signing
pub struct ExtensionSignature {
    signature: Ed25519Signature,
    certificate_chain: Vec<X509Certificate>,
    timestamp: SystemTime,
    permissions_hash: Sha256Hash,
}

impl ExtensionLoader {
    pub fn verify_extension(&self, ext: &Extension) -> SecurityResult<()> {
        // 1. Verify certificate chain against root CA
        self.verify_certificate_chain(&ext.signature.certificate_chain)?;

        // 2. Verify signature against extension hash
        self.verify_signature(&ext.binary_hash, &ext.signature)?;

        // 3. Verify permissions haven't been tampered with
        self.verify_permissions_hash(&ext)?;

        // 4. Check certificate revocation list (CRL)
        self.check_revocation_status(&ext.signature.certificate_chain)?;

        Ok(())
    }
}

🏢 Certificate Authority Hierarchy

Root CA (Symphony Master Key)
├── Infrastructure CA (For internal extensions)
│   ├── Pool Manager Certificate
│   ├── DAG Tracker Certificate
│   └── Artifact Store Certificate
└── Community CA (For external extensions)
    ├── Verified Developer Certificates
    └── Enterprise Customer Certificates