#!/usr/bin/perl # 472-byte qrpff, Keith Winstein and Marc Horowitz # MPEG 2 PS VOB file -> descrambled output on stdout. # usage: perl -I :::: qrpff # where k1..k5 are the title key bytes in least to most-significant order s''$/=2048円;while(){G=29;R=142;if((@a=unqT="C*",_)[20]&48){D=89;_=unqb24,qT,@ b=map{ord qB8,unqb8,qT,_^$a[--D]}@INC;s/...$/1$&/;Q=unqV,qb25,_;H=73;O=$b[4]<<9 |256|$b[3];Q=Q>>8^(P=(E=255)&(Q>>12^Q>>4^Q/8^Q))<<17,o=o>>8^(E&(F=(S=O>>14&7^O) ^S*8^S<<6))<<9,_=(map{u=_%16ore^=r^=110&(s=(unqt,"\xb\ntd\xbz\x14d")[_/16%8]);e ^=(72,@z=(64,72,G^=12*(U-2?0:S&17)),H^=_%64?12:0,@z)[_%8]}(16..271))[_]^((D>>=8 )+=P+(~F&E))for@a[128..$#a]}print+qT,@a}';s/[D-HO-U_]/\$$&/g;s/q/pack+/g;eval

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