mirror of
https://github.com/torvalds/linux.git
synced 2024-12-26 21:02:19 +00:00
cb77f0d623
The default NetBSD package manager is pkgsrc and it installs Perl along other third party programs under custom and configurable prefix. The default prefix for binary prebuilt packages is /usr/pkg, and the Perl executable lands in /usr/pkg/bin/perl. This change switches "/usr/bin/perl" to "/usr/bin/env perl" as it's the most portable solution that should work for almost everybody. Perl's executable is detected automatically. This change switches -w option passed to the executable with more modern "use warnings;" approach. There is no functional change to the default behavior. While there, drop "require 5" from scripts/namespace.pl (Perl from 1994?). Signed-off-by: Kamil Rytarowski <n54@gmx.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
138 lines
3.6 KiB
Perl
Executable File
138 lines
3.6 KiB
Perl
Executable File
#!/usr/bin/env perl
|
|
#
|
|
# extract-mod-sig <part> <module-file>
|
|
#
|
|
# Reads the module file and writes out some or all of the signature
|
|
# section to stdout. Part is the bit to be written and is one of:
|
|
#
|
|
# -0: The unsigned module, no signature data at all
|
|
# -a: All of the signature data, including magic number
|
|
# -d: Just the descriptor values as a sequence of numbers
|
|
# -n: Just the signer's name
|
|
# -k: Just the key ID
|
|
# -s: Just the crypto signature or PKCS#7 message
|
|
#
|
|
use warnings;
|
|
use strict;
|
|
|
|
die "Format: $0 -[0adnks] module-file >out\n"
|
|
if ($#ARGV != 1);
|
|
|
|
my $part = $ARGV[0];
|
|
my $modfile = $ARGV[1];
|
|
|
|
my $magic_number = "~Module signature appended~\n";
|
|
|
|
#
|
|
# Read the module contents
|
|
#
|
|
open FD, "<$modfile" || die $modfile;
|
|
binmode(FD);
|
|
my @st = stat(FD);
|
|
die "$modfile" unless (@st);
|
|
my $buf = "";
|
|
my $len = sysread(FD, $buf, $st[7]);
|
|
die "$modfile" unless (defined($len));
|
|
die "Short read on $modfile\n" unless ($len == $st[7]);
|
|
close(FD) || die $modfile;
|
|
|
|
print STDERR "Read ", $len, " bytes from module file\n";
|
|
|
|
die "The file is too short to have a sig magic number and descriptor\n"
|
|
if ($len < 12 + length($magic_number));
|
|
|
|
#
|
|
# Check for the magic number and extract the information block
|
|
#
|
|
my $p = $len - length($magic_number);
|
|
my $raw_magic = substr($buf, $p);
|
|
|
|
die "Magic number not found at $len\n"
|
|
if ($raw_magic ne $magic_number);
|
|
print STDERR "Found magic number at $len\n";
|
|
|
|
$p -= 12;
|
|
my $raw_info = substr($buf, $p, 12);
|
|
|
|
my @info = unpack("CCCCCxxxN", $raw_info);
|
|
my ($algo, $hash, $id_type, $name_len, $kid_len, $sig_len) = @info;
|
|
|
|
if ($id_type == 0) {
|
|
print STDERR "Found PGP key identifier\n";
|
|
} elsif ($id_type == 1) {
|
|
print STDERR "Found X.509 cert identifier\n";
|
|
} elsif ($id_type == 2) {
|
|
print STDERR "Found PKCS#7/CMS encapsulation\n";
|
|
} else {
|
|
print STDERR "Found unsupported identifier type $id_type\n";
|
|
}
|
|
|
|
#
|
|
# Extract the three pieces of info data
|
|
#
|
|
die "Insufficient name+kid+sig data in file\n"
|
|
unless ($p >= $name_len + $kid_len + $sig_len);
|
|
|
|
$p -= $sig_len;
|
|
my $raw_sig = substr($buf, $p, $sig_len);
|
|
$p -= $kid_len;
|
|
my $raw_kid = substr($buf, $p, $kid_len);
|
|
$p -= $name_len;
|
|
my $raw_name = substr($buf, $p, $name_len);
|
|
|
|
my $module_len = $p;
|
|
|
|
if ($sig_len > 0) {
|
|
print STDERR "Found $sig_len bytes of signature [";
|
|
my $n = $sig_len > 16 ? 16 : $sig_len;
|
|
foreach my $i (unpack("C" x $n, substr($raw_sig, 0, $n))) {
|
|
printf STDERR "%02x", $i;
|
|
}
|
|
print STDERR "]\n";
|
|
}
|
|
|
|
if ($kid_len > 0) {
|
|
print STDERR "Found $kid_len bytes of key identifier [";
|
|
my $n = $kid_len > 16 ? 16 : $kid_len;
|
|
foreach my $i (unpack("C" x $n, substr($raw_kid, 0, $n))) {
|
|
printf STDERR "%02x", $i;
|
|
}
|
|
print STDERR "]\n";
|
|
}
|
|
|
|
if ($name_len > 0) {
|
|
print STDERR "Found $name_len bytes of signer's name [$raw_name]\n";
|
|
}
|
|
|
|
#
|
|
# Produce the requested output
|
|
#
|
|
if ($part eq "-0") {
|
|
# The unsigned module, no signature data at all
|
|
binmode(STDOUT);
|
|
print substr($buf, 0, $module_len);
|
|
} elsif ($part eq "-a") {
|
|
# All of the signature data, including magic number
|
|
binmode(STDOUT);
|
|
print substr($buf, $module_len);
|
|
} elsif ($part eq "-d") {
|
|
# Just the descriptor values as a sequence of numbers
|
|
print join(" ", @info), "\n";
|
|
} elsif ($part eq "-n") {
|
|
# Just the signer's name
|
|
print STDERR "No signer's name for PKCS#7 message type sig\n"
|
|
if ($id_type == 2);
|
|
binmode(STDOUT);
|
|
print $raw_name;
|
|
} elsif ($part eq "-k") {
|
|
# Just the key identifier
|
|
print STDERR "No key ID for PKCS#7 message type sig\n"
|
|
if ($id_type == 2);
|
|
binmode(STDOUT);
|
|
print $raw_kid;
|
|
} elsif ($part eq "-s") {
|
|
# Just the crypto signature or PKCS#7 message
|
|
binmode(STDOUT);
|
|
print $raw_sig;
|
|
}
|