File size: 1,771 Bytes
5448d8b | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | import { readFileSync, existsSync } from "node:fs";
/**
* Validates that a file starts with a known native-binary magic number.
* Returns the platform label ("elf" | "macho" | "macho-le" | "macho-fat" | "pe")
* or null if unrecognized / missing / unreadable.
*
*/
export function validateBinaryMagic(path) {
if (!existsSync(path)) return null;
let buf;
try {
buf = readFileSync(path, { encoding: null }).subarray(0, 16);
} catch {
return null;
}
if (buf.length < 4) return null;
// ELF: 7F 45 4C 46
if (buf[0] === 0x7f && buf[1] === 0x45 && buf[2] === 0x4c && buf[3] === 0x46) return "elf";
// Mach-O big-endian: FE ED FA CF (64-bit) / FE ED FA CE (32-bit)
if (buf[0] === 0xfe && buf[1] === 0xed && buf[2] === 0xfa && buf[3] === 0xcf) return "macho";
if (buf[0] === 0xfe && buf[1] === 0xed && buf[2] === 0xfa && buf[3] === 0xce) return "macho";
// Mach-O little-endian: CF FA ED FE (64-bit) / CE FA ED FE (32-bit)
if (buf[0] === 0xcf && buf[1] === 0xfa && buf[2] === 0xed && buf[3] === 0xfe) return "macho-le";
if (buf[0] === 0xce && buf[1] === 0xfa && buf[2] === 0xed && buf[3] === 0xfe) return "macho-le";
// Mach-O fat (universal binary): CA FE BA BE
if (buf[0] === 0xca && buf[1] === 0xfe && buf[2] === 0xba && buf[3] === 0xbe) return "macho-fat";
// PE (Windows .node — DLL): MZ at offset 0
if (buf[0] === 0x4d && buf[1] === 0x5a) return "pe";
return null;
}
/**
* Returns the expected magic label for the current platform.
* Used to validate that a runtime-installed binary matches this OS.
*/
export function platformBinaryLabel() {
if (process.platform === "win32") return "pe";
if (process.platform === "darwin") return "macho";
return "elf";
}
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