mirror of
https://github.com/feder-cr/invisible_playwright.git
synced 2026-06-22 09:18:06 +02:00
64 lines
2.5 KiB
Python
64 lines
2.5 KiB
Python
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"""Regression guard: render-noise stays ACTIVE on high-entropy WebGL readbacks.
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The near-uniform skip added 2026-06-18 (so fixed-hash reference checks on a solid
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WebGL readback pass) must NOT disable noise on real fingerprint renders. A
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high-entropy WebGL readback (>16 distinct colours) must still differ between two
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seeds — i.e. the per-seed gamma noise is applied. Pairs with
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test_canvas_render_stealth.py (solid readback stays pure).
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Kept in its own file: it launches its own short-lived browsers, so it must not run
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alongside another module's shared browser (the Playwright sync API cannot nest).
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Run: pytest tests/test_webgl_noise_active.py -m e2e -v
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"""
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from __future__ import annotations
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import hashlib
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import pytest
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from invisible_playwright import InvisiblePlaywright
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# A high-entropy render: 64 columns, each a distinct colour (>16 distinct → the
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# near-uniform skip does NOT apply → noise must run).
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_HIGH_ENTROPY_JS = """() => {
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const c = document.createElement('canvas'); c.width = 64; c.height = 64;
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const gl = c.getContext('webgl', {preserveDrawingBuffer: true});
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if (!gl) return null;
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gl.enable(gl.SCISSOR_TEST);
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for (let k = 0; k < 64; k++) {
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gl.scissor(k, 0, 1, 64);
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gl.clearColor(k / 64, (63 - k) / 64, (k * 7 % 64) / 64, 1);
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gl.clear(gl.COLOR_BUFFER_BIT);
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}
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const buf = new Uint8Array(64 * 64 * 4);
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gl.finish(); gl.readPixels(0, 0, 64, 64, gl.RGBA, gl.UNSIGNED_BYTE, buf);
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return Array.from(buf);
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}"""
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def _render_hash(firefox_binary, seed: int):
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with InvisiblePlaywright(
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seed=seed, binary_path=firefox_binary, headless=True,
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extra_prefs={"zoom.stealth.fpp.hw_seed": 1000 + seed},
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) as b:
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p = b.new_context().new_page()
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p.goto("about:blank", timeout=30_000)
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arr = p.evaluate(_HIGH_ENTROPY_JS)
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if arr is None:
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return None
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return hashlib.sha256(bytes(arr)).hexdigest()
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@pytest.mark.e2e
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def test_high_entropy_webgl_still_noised_per_seed(firefox_binary):
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"""Two different seeds → two different per-seed gamma curves → the high-entropy
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readback hashes must differ. Identical hashes would mean the noise was skipped
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on a real (non-uniform) render — a regression of the uniform-skip scope."""
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h1 = _render_hash(firefox_binary, 1)
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h2 = _render_hash(firefox_binary, 2)
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if h1 is None or h2 is None:
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pytest.skip("webgl unavailable")
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assert h1 != h2, \
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"high-entropy WebGL readback identical across seeds → render-noise not applied"
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