mirror of
https://github.com/JogmansonReal/Radicade.git
synced 2026-10-25 23:18:56 -07:00
JogmansonReal
64 lines
3.2 KiB
JavaScript
64 lines
3.2 KiB
JavaScript
// Diagnostic copy only. Never overwrite the metadata consumed by the game.
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const fs = require('node:fs');
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const crypto = require('node:crypto');
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const [source, destination] = process.argv.slice(2);
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if (!source || !destination || require('node:path').resolve(source) === require('node:path').resolve(destination))
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throw new Error('Specify separate source and diagnostic output files.');
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const input = fs.readFileSync(source);
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const header = Buffer.from(input.subarray(0, 256));
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header.fill(0, 0xc0, 0xc4);
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header.fill(0, 0xc8, 0xcc);
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if (crypto.createHash('sha256').update(header).digest('hex') !== '2af65a04fe43613b66fafbe269264a6ec2b4c834304db272f0df68e7503b59e2')
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throw new Error('Not the verified 20230825 header.');
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// Standard v27 section order. Each pair is the offset/size FIELD POSITION
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// in the shuffled header, not a hardcoded section address.
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const fields = [
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[0x2c,0xbc], [0xc8,0xc0], [0xe8,0xc4], [0x20,0xa8],
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[0x24,0x68], [0x44,0xb0], [0x64,0xec], [0xf0,0x04],
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[0x38,0x3c], [0x28,0x80], [0xa0,0x50], [0xf8,0xd4],
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[0xe0,0x5c], [0x08,0x00], [0x18,0x58], [0x4c,0xb4],
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[0x30,0x9c], [0x34,0x98], [0x6c,0x8c], [0x14,0x48],
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[0xd8,0xcc], [0x0c,0xb8], [0x88,0x70], [0x7c,0xd0],
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[0xa4,0x90], [0x78,0x94], [0xe4,0xf4], [0x54,0x40],
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[0xfc,0x10], [0x74,0x84], [0xac,0xdc]
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];
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const output = Buffer.from(input);
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output.writeUInt32LE(0xfab11baf, 0);
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output.writeUInt32LE(27, 4);
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for (let i=0; i<fields.length; i++) {
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const [a,b] = fields[i];
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const offset=input.readUInt32LE(a), size=input.readUInt32LE(b);
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if (offset < 256 || offset + size > input.length) throw new Error(`Section ${i} out of bounds`);
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output.writeUInt32LE(offset, 8+i*8);
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output.writeUInt32LE(size, 12+i*8);
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}
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if (!input.subarray(256).equals(output.subarray(256))) throw new Error('Payload changed');
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// This release also places invalid generic-container indices in each image's
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// synthetic <Module> type. Those types cannot have generic parameters. Repair
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// only verified module rows in the tooling copy; game metadata is untouched.
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const types = output.readUInt32LE(8 + 19*8);
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const typeCount = output.readUInt32LE(12 + 19*8) / 88;
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const images = output.readUInt32LE(8 + 20*8);
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const imageCount = output.readUInt32LE(12 + 20*8) / 40;
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const strings = output.readUInt32LE(24);
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if (imageCount !== 305 || typeCount !== 42537 || output.subarray(strings+42, strings+51).toString() !== '<Module>\0')
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throw new Error('Unexpected August type/image structure');
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const modules = new Set();
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for (let i=0; i<imageCount; i++) {
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const index = output.readInt32LE(images + i*40 + 8);
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const p = types + index*88;
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if (index < 0 || index >= typeCount || modules.has(index) ||
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output.readUInt32LE(p+84) !== 0x02000001 || output.readInt32LE(p) !== 0 ||
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output.readInt32LE(p+24) < 6673)
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throw new Error(`Unexpected module row for image ${i}`);
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modules.add(index);
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output.writeInt32LE(42, p);
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output.writeInt32LE(-1, p+24);
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}
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for (let i=0; i<typeCount; i++) {
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const generic = output.readInt32LE(types+i*88+24);
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if (generic < -1 || generic >= 6673) throw new Error(`Invalid generic container on type ${i}`);
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}
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fs.writeFileSync(destination, output);
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console.log(`Wrote tooling copy: ${destination}; normalized header and ${modules.size} synthetic module rows.`);
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