openssl/crypto/objects/objxref.pl
Richard Levitte 9ba96fbb25 Perl's chop / chomp considered bad, use a regexp instead
Once upon a time, there was chop, which somply chopped off the last
character of $_ or a given variable, and it was used to take off the
EOL character (\n) of strings.

... but then, you had to check for the presence of such character.

So came chomp, the better chop which checks for \n before chopping it
off.  And this worked well, as long as Perl made internally sure that
all EOLs were converted to \n.

These days, though, there seems to be a mixture of perls, so lines
from files in the "wrong" environment might have \r\n as EOL, or just
\r (Mac OS, unless I'm misinformed).

So it's time we went for the more generic variant and use s|\R$||, the
better chomp which recognises all kinds of known EOLs and chops them
off.

A few chops were left alone, as they are use as surgical tools to
remove one last slash or one last comma.

NOTE: \R came with perl 5.10.0.  It means that from now on, our
scripts will fail with any older version.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-11 22:11:48 +01:00

117 lines
2 KiB
Perl

#!/usr/local/bin/perl
use strict;
my %xref_tbl;
my %oid_tbl;
my ($mac_file, $xref_file) = @ARGV;
open(IN, $mac_file) || die "Can't open $mac_file, $!\n";
# Read in OID nid values for a lookup table.
while (<IN>)
{
s|\R$||; # Better chomp
my ($name, $num) = /^(\S+)\s+(\S+)$/;
$oid_tbl{$name} = $num;
}
close IN;
open(IN, $xref_file) || die "Can't open $xref_file, $!\n";
my $ln = 1;
while (<IN>)
{
s|\R$||; # Better chomp
s/#.*$//;
next if (/^\S*$/);
my ($xr, $p1, $p2) = /^(\S+)\s+(\S+)\s+(\S+)/;
check_oid($xr);
check_oid($p1);
check_oid($p2);
$xref_tbl{$xr} = [$p1, $p2, $ln];
}
my @xrkeys = keys %xref_tbl;
my @srt1 = sort { $oid_tbl{$a} <=> $oid_tbl{$b}} @xrkeys;
my $i;
for($i = 0; $i <= $#srt1; $i++)
{
$xref_tbl{$srt1[$i]}[2] = $i;
}
my @srt2 = sort
{
my$ap1 = $oid_tbl{$xref_tbl{$a}[0]};
my$bp1 = $oid_tbl{$xref_tbl{$b}[0]};
return $ap1 - $bp1 if ($ap1 != $bp1);
my$ap2 = $oid_tbl{$xref_tbl{$a}[1]};
my$bp2 = $oid_tbl{$xref_tbl{$b}[1]};
return $ap2 - $bp2;
} @xrkeys;
my $pname = $0;
$pname =~ s|.*/||;
print <<EOF;
/* AUTOGENERATED BY $pname, DO NOT EDIT */
typedef struct {
int sign_id;
int hash_id;
int pkey_id;
} nid_triple;
DEFINE_STACK_OF(nid_triple)
static const nid_triple sigoid_srt[] = {
EOF
foreach (@srt1)
{
my $xr = $_;
my ($p1, $p2) = @{$xref_tbl{$_}};
my $o1 = " {NID_$xr, NID_$p1,";
my $o2 = "NID_$p2},";
if (length("$o1 $o2") < 78)
{
print "$o1 $o2\n";
}
else
{
print "$o1\n $o2\n";
}
}
print "};";
print <<EOF;
static const nid_triple *const sigoid_srt_xref[] = {
EOF
foreach (@srt2)
{
my ($p1, $p2, $x) = @{$xref_tbl{$_}};
# If digest or signature algorithm is "undef" then the algorithm
# needs special handling and is excluded from the cross reference table.
next if $p1 eq "undef" || $p2 eq "undef";
print " \&sigoid_srt\[$x\],\n";
}
print "};\n";
sub check_oid
{
my ($chk) = @_;
if (!exists $oid_tbl{$chk})
{
die "Can't find \"$chk\"\n";
}
}