linux-sgx-trts-modified/psw/ae/pse/pse_op/createhash.pl

#!/usr/bin/env perl
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#generate default hash values for VMC hash tree
use Digest::SHA qw(sha256_hex);

open (OUT,">hashtable.txt");
select OUT;
#create an empty array whose size is sizeof(vmc_entry) x 2
#sizeof(vmc_entry) == 70
@data = chr(0x0) x 140;
$digest = sha256_hex(@data);
@arr = unpack("a2"x32,$digest);
$len=@arr;
$line = "{0x".join(",0x",@arr)."},\n";
print($line);
for($i=0;$i<22;$i++) {
  @data=();
  for($k=0;$k<2;$k++) {
    for($j=0;$j<32;$j++) {
      push(@data,chr(hex($arr[$j])));
    }
  }
  #print(@data);
  $digest = sha256_hex(@data);
  @arr = unpack("a2"x32,$digest);
  $line = "{0x".join(",0x",@arr)."},\n";
  print($line);
}
select STDOUT;