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[ie/xhamster] Fix extractor (#14948)

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Closes #14632
Authored by: dhwz, CaramelConnoisseur
    
Co-authored-by: dhwz <3697946+dhwz@users.noreply.github.com>
This commit is contained in:
Caramel Connoisseur
2025-11-08 19:06:54 +00:00
committed by GitHub
parent a86eeaadf2
commit a1d6351c3f
1 changed files with 31 additions and 0 deletions
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31
yt_dlp/extractor/xhamster.py
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@@ -60,6 +60,37 @@ class _ByteGenerator:
s = to_signed_32(s * to_signed_32(0xc2b2ae3d))
return to_signed_32(s ^ ((s & 0xFFFFFFFF) >> 16))
def _algo4(self, s):
# Custom scrambling function involving a left rotation (ROL)
s = self._s = to_signed_32(s + 0x6d2b79f5)
s = to_signed_32((s << 7) | ((s & 0xFFFFFFFF) >> 25)) # ROL 7
s = to_signed_32(s + 0x9e3779b9)
s = to_signed_32(s ^ ((s & 0xFFFFFFFF) >> 11))
return to_signed_32(s * 0x27d4eb2d)
def _algo5(self, s):
# xorshift variant with a final addition
s = to_signed_32(s ^ (s << 7))
s = to_signed_32(s ^ ((s & 0xFFFFFFFF) >> 9))
s = to_signed_32(s ^ (s << 8))
s = self._s = to_signed_32(s + 0xa5a5a5a5)
return s
def _algo6(self, s):
# LCG (a=0x2c9277b5, c=0xac564b05) with a variable right shift scrambler
s = self._s = to_signed_32(s * to_signed_32(0x2c9277b5) + to_signed_32(0xac564b05))
s2 = to_signed_32(s ^ ((s & 0xFFFFFFFF) >> 18))
shift = (s & 0xFFFFFFFF) >> 27 & 31
return to_signed_32((s2 & 0xFFFFFFFF) >> shift)
def _algo7(self, s):
# Weyl Sequence (k=0x9e3779b9) + custom multiply-xor-shift mixing function
s = self._s = to_signed_32(s + to_signed_32(0x9e3779b9))
e = to_signed_32(s ^ (s << 5))
e = to_signed_32(e * to_signed_32(0x7feb352d))
e = to_signed_32(e ^ ((e & 0xFFFFFFFF) >> 15))
return to_signed_32(e * to_signed_32(0x846ca68b))
def __next__(self):
return self._algorithm(self._s) & 0xFF