Updated application documentation and website homepage to include ASN.1 Validation

2025-08-27 13:25:26 -04:00
parent 6aaabbd1df
commit 398d8bc014
17 changed files with 6784 additions and 1483 deletions
--- a/doc/SECURITY-ARCHITECTURE.md
+++ b/doc/SECURITY-ARCHITECTURE.md
@@ -2,12 +2,12 @@

 ## 🛡️ Overview

-SecureBit.chat implements a revolutionary **12-layer security architecture** that provides military-grade protection for peer-to-peer communications. This document details the technical implementation of our security system, which exceeds most government and enterprise communication standards.
+SecureBit.chat implements a revolutionary **18-layer security architecture** that provides military-grade protection for peer-to-peer communications. This document details the technical implementation of our security system, which exceeds most government and enterprise communication standards.

-**Current Implementation:** Stage 4 - Maximum Security  
-**Security Rating:** Maximum (DTLS Protected)  
+**Current Implementation:** Stage 5 - Maximum Security  
+**Security Rating:** Maximum (ASN.1 Validated)  
 **Active Layers:** 18/18  
-**Threat Protection:** Comprehensive (MITM, Traffic Analysis, Replay Attacks, Session Hijacking, Race Conditions, Key Exposure, DTLS Race Conditions, Memory Safety, Use-After-Free)
+**Threat Protection:** Comprehensive (MITM, Traffic Analysis, Replay Attacks, Session Hijacking, Race Conditions, Key Exposure, DTLS Race Conditions, Memory Safety, Use-After-Free, Key Structure Manipulation)

 ---

@@ -21,23 +21,27 @@ SecureBit.chat implements a revolutionary **12-layer security architecture** tha
 6. [Security Verification](#security-verification)
 7. [Performance Impact](#performance-impact)
 8. [Compliance Standards](#compliance-standards)
+9. [ASN.1 Validation Framework](#asn1-validation-framework)

 ---

 ## 🏗️ Security Architecture Overview

-### 12-Layer Defense System
+### 18-Layer Defense System

 ```
 ┌─────────────────────────────────────────────────────────────┐
 │                    APPLICATION LAYER                        │
 ├─────────────────────────────────────────────────────────────┤
-│ Layer 18: Memory Safety Protection (Use-After-Free)        │
-│ Layer 17: DTLS Race Condition Protection (WebRTC Security) │
-│ Layer 16: Atomic Operations (Race Condition Prevention)    │
+│ Layer 18: EC Point Validation (Format & Structure)         │
+│ Layer 17: OID Validation (Algorithm & Curve Verification)  │
+│ Layer 16: ASN.1 Validation (Complete Key Structure)        │
 │ Layer 15: Production Security Logging (Data Sanitization)  │
 │ Layer 14: Secure Key Storage (WeakMap Isolation)           │
 │ Layer 13: Mutex Framework (Race Condition Protection)      │
+├─────────────────────────────────────────────────────────────┤
+│                   CRYPTOGRAPHIC LAYER                      │
+├─────────────────────────────────────────────────────────────┤
 │ Layer 12: Perfect Forward Secrecy (Key Rotation)           │
 │ Layer 11: Enhanced Rate Limiting (DDoS Protection)         │
 │ Layer 10: Fake Traffic Generation (Traffic Analysis)       │
@@ -71,7 +75,7 @@ SecureBit.chat implements a revolutionary **12-layer security architecture** tha
 | 3     | 1-9          | High           | + Timing attacks |
 | 4     | 1-12         | High Enhanced  | + Advanced persistent threats |
 | 5     | 1-15         | Military-Grade | + Race conditions, Key exposure |
-| 6     | 1-18         | Maximum        | + DTLS race conditions, Memory safety |
+| 6     | 1-18         | Maximum        | + DTLS race conditions, Memory safety, Key structure validation |

 ---

@@ -94,328 +98,108 @@ const keyPackage = {
    keyType: 'ECDSA',
    keyData: exported384BitKey,
    timestamp: Date.now(),
-    version: '4.0',
+    version: '4.02',
    signature: ecdsaSignature
 };
 ```

-**Protection Against:**
- Message tampering
- Sender impersonation
- Man-in-the-middle attacks
- Key substitution attacks
-
---
-
-### Layer 2: Key Exchange (ECDH P-384)
-**Purpose:** Secure key agreement between peers without central authority
+### Layer 16: ASN.1 Validation (Complete Key Structure)
+**Purpose:** Complete structural validation of all cryptographic keys according to PKCS standards

 **Technical Specifications:**
- **Algorithm:** Elliptic Curve Diffie-Hellman
- **Curve:** NIST P-384 (secp384r1)
- **Key Derivation:** HKDF with SHA-384
- **Salt Size:** 64 bytes (enhanced from standard 32 bytes)
- **Context Info:** "SecureBit.chat v4.0 Enhanced Security Edition"
-
-**Key Derivation Process:**
-```javascript
-// Triple key derivation for maximum security
-const derivedKeys = {
-    encryptionKey: HKDF(sharedSecret, salt, "message-encryption-v4"),
-    macKey: HKDF(sharedSecret, salt, "message-authentication-v4"),
-    metadataKey: HKDF(sharedSecret, salt, "metadata-protection-v4")
-};
-```
-
-**Protection Against:**
- Passive eavesdropping
- Key recovery attacks
- Weak key generation
- Quantum computer threats (post-quantum resistant)
-
---
-
-### Layer 3: Metadata Protection (Separate AES-GCM)
-**Purpose:** Protect message metadata from analysis and correlation
-
-**Technical Specifications:**
- **Algorithm:** AES-256-GCM
- **Key:** Separate 256-bit key derived from ECDH
- **IV:** 96-bit random per message
- **Authentication:** Integrated GMAC
- **Protected Data:** Message ID, timestamp, sequence number, original length
-
-**Metadata Structure:**
-```javascript
-const protectedMetadata = {
-    id: "msg_timestamp_counter",
-    timestamp: encryptedTimestamp,
-    sequenceNumber: encryptedSequence,
-    originalLength: encryptedLength,
-    version: "4.0"
-};
-```
-
-**Protection Against:**
- Traffic flow analysis
- Message correlation attacks
- Timing analysis
- Size-based fingerprinting
-
---
-
-### Layer 4: Message Encryption (Enhanced AES-GCM)
-**Purpose:** Primary message content protection with authenticated encryption
-
-**Technical Specifications:**
- **Algorithm:** AES-256-GCM
- **Key:** 256-bit derived from ECDH
- **IV:** 96-bit random per message
- **Authentication:** Integrated GMAC + separate HMAC
- **Padding:** PKCS#7 + random padding
- **MAC Algorithm:** HMAC-SHA-384
-
-**Enhanced Features:**
- Sequence number validation
- Replay attack prevention
- Message integrity verification
- Deterministic serialization for MAC
-
-**Protection Against:**
- Content interception
- Message modification
- Replay attacks
- Authentication bypass
-
---
-
-### Layer 5: Nested Encryption (Additional AES-GCM)
-**Purpose:** Second layer of encryption for maximum confidentiality
-
-**Technical Specifications:**
- **Algorithm:** AES-256-GCM (independent instance)
- **Key:** Separate 256-bit key (hardware-generated)
- **IV:** 96-bit unique per encryption
- **Counter:** Incremental counter for IV uniqueness
- **Key Rotation:** Every 1000 messages or 15 minutes
+- **Parser:** Complete ASN.1 DER parser
+- **Validation Scope:** Full key structure verification
+- **Standards:** RFC 5280, RFC 5480, PKCS compliance
+- **Performance:** < 10ms validation time
+- **Coverage:** All cryptographic operations

 **Implementation:**
 ```javascript
-// Nested encryption with unique IV
-const uniqueIV = new Uint8Array(12);
-uniqueIV.set(baseIV);
-uniqueIV[11] = (counter++) & 0xFF;
-
-const nestedEncrypted = await crypto.subtle.encrypt(
-    { name: 'AES-GCM', iv: uniqueIV },
-    nestedEncryptionKey,
-    alreadyEncryptedData
-);
-```
-
-**Protection Against:**
- Cryptographic implementation flaws
- Algorithm-specific attacks
- Side-channel attacks
- Future cryptographic breaks
-
---
-
-### Layer 6: Packet Padding (Size Obfuscation)
-**Purpose:** Hide real message sizes to prevent traffic analysis
-
-**Technical Specifications:**
- **Padding Range:** 64-1024 bytes (configurable)
- **Algorithm:** Cryptographically secure random
- **Distribution:** Uniform random within range
- **Header:** 4-byte original size indicator
- **Efficiency:** Optimized for minimal overhead
-
-**Padding Algorithm:**
-```javascript
-const paddingSize = Math.floor(Math.random() * 
-    (maxPadding - minPadding + 1)) + minPadding;
-const padding = crypto.getRandomValues(new Uint8Array(paddingSize));
-
-// Structure: [originalSize:4][originalData][randomPadding]
-```
-
-**Protection Against:**
- Message size analysis
- Traffic pattern recognition
- Statistical correlation attacks
- Content-based fingerprinting
-
---
-
-### Layer 7: Anti-Fingerprinting (Pattern Obfuscation)
-**Purpose:** Prevent behavioral analysis and traffic fingerprinting
-
-**Technical Specifications:**
- **Noise Injection:** 8-40 bytes random data
- **Size Randomization:** ±25% size variation
- **Pattern Masking:** XOR with cryptographic noise
- **Header Randomization:** Fake headers injection
- **Timing Obfuscation:** Random delays (50-1000ms)
-
-**Obfuscation Techniques:**
-```javascript
-// Multi-layer obfuscation
-const obfuscated = {
-    addNoise: () => injectRandomBytes(8, 40),
-    randomizeSize: () => varySize(0.75, 1.25),
-    maskPatterns: () => xorWithNoise(data),
-    addFakeHeaders: () => injectFakeHeaders(1, 3)
+// Complete ASN.1 DER parsing and validation
+const validateKeyStructure = (keyData) => {
+    const asn1Parser = new ASN1Validator();
+    const parsed = asn1Parser.parseDER(keyData);
+    
+    // Validate complete structure
+    if (!asn1Parser.validateSPKI(parsed)) {
+        throw new Error('Invalid SPKI structure');
+    }
+    
+    // Validate OID and curves
+    if (!asn1Parser.validateOID(parsed)) {
+        throw new Error('Invalid algorithm OID');
+    }
+    
+    // Validate EC point format
+    if (!asn1Parser.validateECPoint(parsed)) {
+        throw new Error('Invalid EC point format');
+    }
+    
+    return true;
 };
 ```

-**Protection Against:**
- Behavioral fingerprinting
- Machine learning classification
- Protocol identification
- Application detection
-
---
-
-### Layer 8: Packet Reordering Protection (Sequence Security)
-**Purpose:** Maintain message integrity despite network reordering
+### Layer 17: OID Validation (Algorithm & Curve Verification)
+**Purpose:** Verification of cryptographic algorithms and elliptic curves

 **Technical Specifications:**
- **Sequence Numbers:** 32-bit incremental
- **Timestamps:** 32-bit Unix timestamp
- **Buffer Size:** Maximum 10 out-of-order packets
- **Timeout:** 5 seconds for reordering
- **Header Size:** 8-12 bytes (depending on configuration)
+- **Supported Curves:** P-256, P-384 only
+- **Algorithm Validation:** Complete OID verification
+- **Fallback Support:** P-384 to P-256 compatibility
+- **Security:** Prevents algorithm substitution attacks

-**Reordering Algorithm:**
+**Implementation:**
 ```javascript
-// Packet structure: [sequence:4][timestamp:4][size:4][data]
-const packetHeader = {
-    sequence: sequenceNumber++,
-    timestamp: Date.now(),
-    dataSize: actualDataLength
+// OID validation for algorithms and curves
+const validateOID = (parsed) => {
+    const validOIDs = {
+        '1.2.840.10045.3.1.7': 'P-256',  // secp256r1
+        '1.3.132.0.34': 'P-384'          // secp384r1
+    };
+    
+    const oid = parsed.algorithm.algorithm;
+    if (!validOIDs[oid]) {
+        throw new Error(`Unsupported curve: ${oid}`);
+    }
+    
+    return validOIDs[oid];
 };
 ```

-**Protection Against:**
- Packet injection attacks
- Sequence number attacks
- Network-level tampering
- Order-dependent vulnerabilities
-
---
-
-### Layer 9: Message Chunking (Timing Analysis Protection)
-**Purpose:** Break large messages into randomized chunks with delays
+### Layer 18: EC Point Validation (Format & Structure Verification)
+**Purpose:** Verification of elliptic curve point format and structure

 **Technical Specifications:**
- **Chunk Size:** Maximum 1024-2048 bytes
- **Delay Range:** 50-300ms between chunks
- **Randomization:** True randomness for delays and sizes
- **Headers:** 16-byte chunk identification
- **Reassembly:** Timeout-based with 5-second limit
+- **Format:** Uncompressed format 0x04 only
+- **Structure:** Complete point coordinate validation
+- **Size Limits:** 50-2000 bytes to prevent DoS attacks
+- **BIT STRING:** Unused bits must be 0

-**Chunking Structure:**
+**Implementation:**
 ```javascript
-// Chunk header: [messageId:4][chunkIndex:4][totalChunks:4][chunkSize:4]
-const chunkHeader = {
-    messageId: uniqueMessageId,
-    chunkIndex: currentChunk,
-    totalChunks: totalChunkCount,
-    chunkSize: thisChunkSize
+// EC point format and structure validation
+const validateECPoint = (parsed) => {
+    const publicKey = parsed.subjectPublicKey;
+    
+    // Check format (uncompressed 0x04)
+    if (publicKey[0] !== 0x04) {
+        throw new Error('Only uncompressed EC point format supported');
+    }
+    
+    // Validate size limits
+    if (publicKey.length < 50 || publicKey.length > 2000) {
+        throw new Error('Key size outside allowed range (50-2000 bytes)');
+    }
+    
+    // Validate BIT STRING unused bits
+    if (parsed.unusedBits !== 0) {
+        throw new Error('BIT STRING unused bits must be 0');
+    }
+    
+    return true;
 };
 ```

-**Protection Against:**
- Timing correlation attacks
- Large message identification
- Burst analysis
- Real-time content analysis
-
---
-
-### Layer 10: Fake Traffic Generation (Traffic Analysis Protection)
-**Purpose:** Generate convincing decoy traffic to mask real communications
-
-**Technical Specifications:**
- **Frequency:** 10-30 second intervals
- **Size Range:** 32-256 bytes
- **Patterns:** 5 different message types
- **Encryption:** Full security layer processing
- **Detection:** Invisible to users (filtered at receiver)
-
-**Fake Message Types:**
-```javascript
-const fakePatterns = {
-    'heartbeat': () => generateHeartbeatPattern(),
-    'status': () => generateStatusPattern(),
-    'sync': () => generateSyncPattern(),
-    'ping': () => generatePingPattern(),
-    'pong': () => generatePongPattern()
-};
-```
-
-**Protection Against:**
- Traffic volume analysis
- Communication timing analysis
- Silence period detection
- Conversation pattern recognition
-
---
-
-### Layer 11: Enhanced Rate Limiting (DDoS Protection)
-**Purpose:** Prevent abuse and ensure service availability
-
-**Technical Specifications:**
- **Message Rate:** 60 messages per minute
- **Connection Rate:** 5 connections per 5 minutes
- **Sliding Window:** Time-based with cleanup
- **Verification:** Cryptographic rate tokens
- **Storage:** In-memory with automatic cleanup
-
-**Rate Limiting Algorithm:**
-```javascript
-const rateLimits = {
-    messages: new Map(), // identifier -> timestamps[]
-    connections: new Map(), // identifier -> timestamps[]
-    cleanup: () => removeExpiredEntries(1, 'hour')
-};
-```
-
-**Protection Against:**
- Message flooding attacks
- Connection exhaustion
- Resource consumption attacks
- Service degradation
-
---
-
-### Layer 12: Perfect Forward Secrecy (Key Rotation)
-**Purpose:** Ensure past communications remain secure even if keys are compromised
-
-**Technical Specifications:**
- **Rotation Interval:** 5 minutes or 100 messages
- **Key Versions:** Tracked with version numbers
- **Old Key Storage:** Maximum 3 previous versions (15 minutes)
- **Rotation Protocol:** Automated with peer coordination
- **Cleanup:** Automatic old key destruction
-
-**Key Rotation Process:**
-```javascript
-const pfsImplementation = {
-    rotationTrigger: () => checkTime(5, 'minutes') || checkMessages(100),
-    keyVersioning: () => incrementVersion(),
-    oldKeyCleanup: () => removeKeysOlderThan(15, 'minutes'),
-    automaticRotation: () => rotateIfNeeded()
-};
-```
-
-**Protection Against:**
- Long-term key compromise
- Historical data decryption
- Persistent surveillance
- Future cryptographic breaks
-
 ---

 ## 🔐 Cryptographic Specifications