FuJianModelPlatform/RuoYi-Vue3/analyze_cesium_obfuscation.cjs

const fs = require('fs');

// Analyze Cesium.js obfuscation to find the uniform switch-case
const cesium = fs.readFileSync('public/Cesium/Cesium.js', 'utf8');

// Find the SAMPLER_3D constant: 'SAMPLER_3D':0x8b5f
const s3Idx = cesium.indexOf("'SAMPLER_3D':0x8b5f");
if (s3Idx < 0) {
    console.error('SAMPLER_3D constant not found');
    process.exit(1);
}
console.log('SAMPLER_3D constant at byte:', s3Idx);
console.log('Context:', cesium.substring(Math.max(0, s3Idx - 80), s3Idx + 40));

// Find the object that contains the WebGL constants
// Looking backward for the object opening
const objStart = cesium.lastIndexOf('{', s3Idx - 100);
console.log('\nObject definition starting at:', objStart);
console.log('Object start context:', cesium.substring(objStart, Math.min(cesium.length, objStart + 200)));

// The obfuscated code uses an object like:
// var _0x... = {'SAMPLER_2D':0x8b5e,'SAMPLER_3D':0x8b5f,'SAMPLER_CUBE':0x8b60,...}
// This object is assigned to a variable and used in switch cases

// Find the variable name being assigned
const varMatch = cesium.substring(Math.max(0, objStart - 100), objStart).match(/var\s+(\w+)\s*=\s*$/);
if (varMatch) {
    const varName = varMatch[1];
    console.log('\nVariable name:', varName);
    
    // Search for usage of this variable with SAMPLER_2D in a case context
    const searchStr = varName + '.SAMPLER_2D';
    let pos = 0;
    let count = 0;
    const results = [];
    while ((pos = cesium.indexOf(searchStr, pos)) >= 0 && count < 10) {
        results.push(pos);
        pos++;
        count++;
    }
    
    console.log('\nFound', results.length, 'occurrences of', searchStr);
    for (const r of results) {
        const ctx = cesium.substring(Math.max(0, r - 40), Math.min(cesium.length, r + 80));
        console.log('  byte', r, ':', ctx.substring(0, 120));
        
        // Check if this is in a switch-case
        if (ctx.includes('case')) {
            console.log('  *** IN SWITCH CASE ***');
            
            // Check if SAMPLER_3D is also in the same switch
            const switchStart = cesium.lastIndexOf('switch', r);
            if (switchStart >= 0) {
                const blockEnd = cesium.indexOf('}', r);
                const switchBlock = cesium.substring(switchStart, Math.min(cesium.length, blockEnd + 100));
                const hasS3 = switchBlock.includes('SAMPLER_3D');
                console.log('  SAMPLER_3D in same switch:', hasS3);
                
                if (!hasS3) {
                    console.log('  *** SAMPLER_3D MISSING! Need to patch here ***');
                    // Extract the full case block
                    const caseStart = switchBlock.indexOf('case');
                    console.log('  Full switch block (first 500 chars):', switchBlock.substring(caseStart, Math.min(switchBlock.length, caseStart + 500)));
                }
            }
        }
    }
} else {
    console.log('Could not find variable assignment pattern');
    
    // Alternative: search for SAMPLER_2D used in nearby context
    // Try finding by searching for this pattern
    const patterns = ['.SAMPLER_2D', "['SAMPLER_2D']"];
    for (const p of patterns) {
        let pos = 0;
        while ((pos = cesium.indexOf(p, 100000)) >= 0) {
            const ctx = cesium.substring(Math.max(0, pos - 60), Math.min(cesium.length, pos + 80));
            console.log('\nFound', p, 'at byte', pos, ':', ctx.substring(0, 150));
            pos++;
        }
    }
}