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@maca134
Last active November 16, 2021 00:24
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Get Chrome Extension ID in NodeJS
import { readFileSync } from 'fs';
import { parse } from 'protobufjs';
if (!process.argv[2]) throw new Error('no arg');
const file = readFileSync(process.argv[2]);
if (!file) throw new Error('no file');
const root = parse(`
package chromeextensionid;
syntax = "proto3";
message CrxFileHeader {
repeated AsymmetricKeyProof sha256_with_rsa = 2;
repeated AsymmetricKeyProof sha256_with_ecdsa = 3;
optional SignedData signed_header_data = 10000;
}
message AsymmetricKeyProof {
optional bytes public_key = 1;
optional bytes signature = 2;
}
message SignedData {
optional bytes crx_id = 1;
}
`).root;
const CrxFileHeader = root.lookupType('chromeextensionid.CrxFileHeader');
const headerObj = CrxFileHeader.decode(file.slice(12, 12 + file.readInt32LE(8))) as any;
const crxId = headerObj.signedHeaderData.crxId as Buffer;
const chars = '0123456789abcdefghijklmnop'.split('');
const id = crxId.toString('hex')
.split('')
.map(c => chars[chars.findIndex(d => c === d) + 10])
.join('');
console.log(id);
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