morluto
d672cc2399
Decode native binary plists from bounded owned source bytes before conversion can erase scalar values. Share scalar preflight and isolate overlapping decoder records while retaining exact integers, date uncertainty, and original bytes. Refuse numeric payloads that read structural table bytes, and avoid retaining projection metadata when callers only need structural validation. Closes #5701 Closes #5703 Closes #5705 Closes #5782 Closes #5783 Closes #5792
48 lines
1.8 KiB
TypeScript
48 lines
1.8 KiB
TypeScript
import { scanBinaryPlistScalars } from "../../src/artifacts/apple/PlistScalars.js";
|
|
import {
|
|
readBinaryPlistObjectOffset,
|
|
readBinaryPlistObjectTableLayout,
|
|
writeBinaryPlistObjectOffset,
|
|
} from "./binaryPlistObjectTable.js";
|
|
|
|
/** Place a reachable date object inside a 16-byte data object's payload. */
|
|
export const embedSubmillisecondDateInWideIntegerPayload = (
|
|
source: Buffer,
|
|
targetDateSeconds?: number,
|
|
): { readonly bytes: Buffer; readonly integerDecimal: string } => {
|
|
const bytes = Buffer.from(source);
|
|
const dates = scanBinaryPlistScalars(bytes).dates;
|
|
const date =
|
|
targetDateSeconds === undefined
|
|
? dates[0]
|
|
: dates.find(
|
|
({ secondsSince2001 }) => secondsSince2001 === targetDateSeconds,
|
|
);
|
|
if (date === undefined) throw new Error("binary plist fixture lost its date");
|
|
const objectTable = readBinaryPlistObjectTableLayout(bytes);
|
|
let dataOffset: number | undefined;
|
|
let dateObjectId: number | undefined;
|
|
for (let objectId = 0; objectId < objectTable.objectCount; objectId += 1) {
|
|
const offset = readBinaryPlistObjectOffset(bytes, objectTable, objectId);
|
|
if (offset === date.offset) dateObjectId = objectId;
|
|
if (bytes[offset] === 0x4f) dataOffset = offset;
|
|
}
|
|
if (dataOffset === undefined || dateObjectId === undefined)
|
|
throw new Error(
|
|
"binary plist fixture lost its wide integer or date object",
|
|
);
|
|
|
|
const dateOffset = dataOffset + 4;
|
|
bytes[dataOffset] = 0x14;
|
|
bytes.fill(0, dataOffset + 1, dataOffset + 17);
|
|
bytes[dateOffset] = 0x33;
|
|
bytes.writeDoubleBE(0.1005, dateOffset + 1);
|
|
writeBinaryPlistObjectOffset(bytes, objectTable, dateObjectId, dateOffset);
|
|
const integer = BigInt.asIntN(
|
|
128,
|
|
(bytes.readBigUInt64BE(dataOffset + 1) << 64n) |
|
|
bytes.readBigUInt64BE(dataOffset + 9),
|
|
);
|
|
return { bytes, integerDecimal: integer.toString() };
|
|
};
|