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fix(adb): validate screen capture PNG headers (#7962)

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* fix(adb): validate screen capture PNG headers

* fix(adb): state screen header validation limits

* style(adb): format screen capture assertion

Match the current formatter after integrating main.

Co-authored-by: morluto <morluto@users.noreply.github.com>

---------

Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: morluto <morluto@users.noreply.github.com>
This commit is contained in:
morlutomorlutoCursor Agent
 authored and GitHub committed 2026-10-29 16:04:49 +08:00
1 parent 2b85a4a2ba
commit f7cd4e5256
7 files changed
+116 -37
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src/adb/AdbShellOutput.ts
-23
View File
@@ -609,26 +609,3 @@ export const parseAmStartOutput = (
(text === "" ? "am start returned no activity" : text.slice(0, 512)),
};
};
const PNG_SIGNATURE = Buffer.from([
0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a,
]);
/** Read image dimensions from a PNG header, or null for other payloads. */
export const parsePngDimensions = (
bytes: Uint8Array,
): {
width: number | null;
height: number | null;
} => {
if (
bytes.length < 24 ||
!Buffer.from(bytes.subarray(0, 8)).equals(PNG_SIGNATURE)
)
return { width: null, height: null };
const view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);
return {
width: view.getUint32(16),
height: view.getUint32(20),
};
};