From 711e72c292327674c4a0593fdbb83d6347738ec9 Mon Sep 17 00:00:00 2001
From: dirkf <fieldhouse@gmx.net>
Date: Thu, 6 Feb 2025 21:09:00 +0000
Subject: [PATCH] [JSInterp] Fix bit-shift coercion for player 9c6dfc4a

---
 test/test_jsinterp.py          |  4 ++++
 test/test_youtube_signature.py |  4 ++++
 youtube_dl/compat.py           |  5 +++++
 youtube_dl/jsinterp.py         | 27 +++++++++++++++++++++------
 4 files changed, 34 insertions(+), 6 deletions(-)

diff --git a/test/test_jsinterp.py b/test/test_jsinterp.py
index 12e7b9b94..6c34bc896 100644
--- a/test/test_jsinterp.py
+++ b/test/test_jsinterp.py
@@ -459,6 +459,10 @@ class TestJSInterpreter(unittest.TestCase):
         self._test('function f(){return undefined >> 5}', 0)
         self._test('function f(){return 42 << NaN}', 42)
         self._test('function f(){return 42 << Infinity}', 42)
+        self._test('function f(){return 0.0 << null}', 0)
+        self._test('function f(){return NaN << 42}', 0)
+        self._test('function f(){return "21.9" << 1}', 42)
+        self._test('function f(){return 21 << 4294967297}', 42)
 
     def test_negative(self):
         self._test('function f(){return 2    *    -2.0    ;}', -4)
diff --git a/test/test_youtube_signature.py b/test/test_youtube_signature.py
index fcbc9d7a8..67ef75fde 100644
--- a/test/test_youtube_signature.py
+++ b/test/test_youtube_signature.py
@@ -219,6 +219,10 @@ _NSIG_TESTS = [
         'https://www.youtube.com/s/player/2f1832d2/player_ias.vflset/en_US/base.js',
         'YWt1qdbe8SAfkoPHW5d', 'RrRjWQOJmBiP',
     ),
+    (
+        'https://www.youtube.com/s/player/9c6dfc4a/player_ias.vflset/en_US/base.js',
+        'jbu7ylIosQHyJyJV', 'uwI0ESiynAmhNg',
+    ),
 ]
 
 
diff --git a/youtube_dl/compat.py b/youtube_dl/compat.py
index c621f7476..26b655fb6 100644
--- a/youtube_dl/compat.py
+++ b/youtube_dl/compat.py
@@ -3116,17 +3116,21 @@ else:
     compat_kwargs = lambda kwargs: kwargs
 
 
+# compat_numeric_types
 try:
     compat_numeric_types = (int, float, long, complex)
 except NameError:  # Python 3
     compat_numeric_types = (int, float, complex)
 
 
+# compat_integer_types
 try:
     compat_integer_types = (int, long)
 except NameError:  # Python 3
     compat_integer_types = (int, )
 
+# compat_int
+compat_int = compat_integer_types[-1]
 
 if sys.version_info < (2, 7):
     def compat_socket_create_connection(address, timeout, source_address=None):
@@ -3532,6 +3536,7 @@ __all__ = [
     'compat_http_client',
     'compat_http_server',
     'compat_input',
+    'compat_int',
     'compat_integer_types',
     'compat_itertools_count',
     'compat_itertools_zip_longest',
diff --git a/youtube_dl/jsinterp.py b/youtube_dl/jsinterp.py
index 7835187f5..2859bc734 100644
--- a/youtube_dl/jsinterp.py
+++ b/youtube_dl/jsinterp.py
@@ -24,6 +24,8 @@ from .compat import (
     compat_collections_chain_map as ChainMap,
     compat_contextlib_suppress,
     compat_filter as filter,
+    compat_int,
+    compat_integer_types,
     compat_itertools_zip_longest as zip_longest,
     compat_map as map,
     compat_numeric_types,
@@ -70,14 +72,27 @@ class JS_Undefined(object):
     pass
 
 
-def _js_bit_op(op):
+def _js_bit_op(op, is_shift=False):
 
-    def zeroise(x):
-        return 0 if x in (None, JS_Undefined, _NaN, _Infinity) else x
+    def zeroise(x, is_shift_arg=False):
+        if isinstance(x, compat_integer_types):
+            return (x % 32) if is_shift_arg else (x & 0xffffffff)
+        try:
+            x = float(x)
+            if is_shift_arg:
+                x = int(x % 32)
+            elif x < 0:
+                x = -compat_int(-x % 0xffffffff)
+            else:
+                x = compat_int(x % 0xffffffff)
+        except (ValueError, TypeError):
+            # also here for int(NaN), including float('inf') % 32
+            x = 0
+        return x
 
     @wraps_op(op)
     def wrapped(a, b):
-        return op(zeroise(a), zeroise(b)) & 0xffffffff
+        return op(zeroise(a), zeroise(b, is_shift)) & 0xffffffff
 
     return wrapped
 
@@ -253,8 +268,8 @@ def _js_typeof(expr):
 # avoid dict to maintain order
 # definition None => Defined in JSInterpreter._operator
 _OPERATORS = (
-    ('>>', _js_bit_op(operator.rshift)),
-    ('<<', _js_bit_op(operator.lshift)),
+    ('>>', _js_bit_op(operator.rshift, True)),
+    ('<<', _js_bit_op(operator.lshift, True)),
     ('+', _js_add),
     ('-', _js_arith_op(operator.sub)),
     ('*', _js_arith_op(operator.mul)),