// kext.iohid · IOKit.framework · IOHIDEventAppendEvent · CVE-2026-65385
// 原语: OOB 写 · 内核 · tier 3
// Primitive: OOB write · kernel · tier 3
//
// [zh] IOKit 事件短堆固定偏移写
// 该缺陷的载体为用户态 IOKit.framework 而非 kext：IOHIDEventAppendEvent 在短堆事件上按固定偏移执行 OR 写。27.2 在 framework 内修复，
// 内核 __DATA_CONST 的 assert 表中不存在相关记录。
//
// [en] IOKit event short-heap fixed-offset write
// This defect's carrier is user-space IOKit.framework rather than a kext: IOHIDEventAppendEvent performs
// an OR write at a fixed offset on a short heap event. iOS 27.2 fixes it inside the framework; the
// kernel's __DATA_CONST assert table has no related record.
// ── 判别 / oracle ──
// 探用户态 IOKit 是否导出事件构造入口。

import Foundation

// ── byte helpers — verbatim from Cinder27 Sources/Kit.swift ──
enum B {
    static func be16(_ v: UInt16) -> [UInt8] { [UInt8(v >> 8 & 0xff), UInt8(v & 0xff)] }
    static func le16(_ v: UInt16) -> [UInt8] { [UInt8(v & 0xff), UInt8(v >> 8 & 0xff)] }
    static func be32(_ v: UInt32) -> [UInt8] {
        [UInt8(v >> 24 & 0xff), UInt8(v >> 16 & 0xff), UInt8(v >> 8 & 0xff), UInt8(v & 0xff)]
    }
    static func le32(_ v: UInt32) -> [UInt8] {
        [UInt8(v & 0xff), UInt8(v >> 8 & 0xff), UInt8(v >> 16 & 0xff), UInt8(v >> 24 & 0xff)]
    }
    static func be64(_ v: UInt64) -> [UInt8] {
        (0..<8).map { UInt8((v >> (56 - UInt64($0) * 8)) & 0xff) }
    }
    static func le64(_ v: UInt64) -> [UInt8] {
        (0..<8).map { UInt8((v >> (UInt64($0) * 8)) & 0xff) }
    }
    static func both16(_ v: UInt16) -> [UInt8] { le16(v) + be16(v) }
    static func both32(_ v: UInt32) -> [UInt8] { le32(v) + be32(v) }
    static func ascii(_ s: String) -> [UInt8] { Array(s.utf8) }
}