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#!/usr/bin/env perl
# dertoc.pl
# version 1.0
# Updated 07/31/2018
#
# Copyright (C) 2006-2018 wolfSSL Inc.
#
use strict;
use warnings;
my $num_args = $#ARGV + 1;
if ($num_args != 3 ) {
print "usage: ./scripts/dertoc.pl ./certs/server-cert.der server_cert_der_2048 dertoc.c\n";
exit;
}
my $inFile = $ARGV[0];
my $outName = $ARGV[1];
my $outputFile = $ARGV[2];
# open our output file, "+>" creates and/or truncates
open OUT_FILE, "+>", $outputFile or die $!;
print OUT_FILE "/* $outputFile */\n\n";
print OUT_FILE "static const unsigned char $outName\[] =\n";
print OUT_FILE "{\n";
file_to_hex($inFile);
print OUT_FILE "};\n";
print OUT_FILE "static const int sizeof_$outName = sizeof($outName);\n\n";
# close file
close OUT_FILE or die $!;
# print file as hex, comma-separated, as needed by C buffer
sub file_to_hex {
my $fileName = $_[0];
open my $fp, "<", $fileName or die $!;
binmode($fp);
my $fileLen = -s $fileName;
my $byte;
for (my $i = 0, my $j = 1; $i < $fileLen; $i++, $j++)
{
if ($j == 1) {
print OUT_FILE "\t";
}
read($fp, $byte, 1) or die "Error reading $fileName";
my $output = sprintf("0x%02X", ord($byte));
print OUT_FILE $output;
if ($i != ($fileLen - 1)) {
print OUT_FILE ", ";
}
if ($j == 10) {
$j = 0;
print OUT_FILE "\n";
}
}
print OUT_FILE "\n";
close($fp);
}
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