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#!/bin/bin/perl -w
#
# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# See the COPYRIGHT file distributed with this work for additional
# information regarding copyright ownership.
# Our SPNEGO implementation uses some functions generated by the
# Heimdal ASN.1 compiler, which this script then whacks a bit to make
# them work properly in this stripped down implementation. We don't
# want to require our users to have a copy of the compiler, so we ship
# the output of this script, but we need to keep the script around in
# any case to cope with future changes to the SPNEGO ASN.1 code, so we
# might as well supply the script for users who want it.
# Overall plan: run the ASN.1 compiler, run each of its output files
# through indent, fix up symbols and whack everything to be static.
# We use indent for two reasons: (1) to whack the Heimdal compiler's
# output into something closer to ISC's coding standard, and (2) to
# make it easier for this script to parse the result.
# Output from this script is C code which we expect to be #included
# into another C file, which is why everything generated by this
# script is marked "static". The intent is to minimize the number of
# extern symbols exported by the SPNEGO implementation, to avoid
# potential conflicts with the GSSAPI libraries.
###
# Filename of the ASN.1 specification. Hardcoded for the moment
# since this script is intended for compiling exactly one module.
my $asn1_source = $ENV{ASN1_SOURCE} || "spnego.asn1";
# Heimdal ASN.1 compiler. This script was written using the version
# from Heimdal 0.7.1. To build this, download a copy of
# heimdal-0.7.1.tar.gz, configure and build with the default options,
# then look for the compiler in heimdal-0.7.1/lib/asn1/asn1_compile.
my $asn1_compile = $ENV{ASN1_COMPILE} || "asn1_compile";
# BSD indent program. This script was written using the version of
# indent that comes with FreeBSD 4.11-STABLE. The GNU project, as
# usual, couldn't resist the temptation to monkey with indent's
# command line syntax, so this probably won't work with GNU indent.
my $indent = $ENV{INDENT} || "indent";
###
# Step 1: run the compiler. Input is the ASN.1 file. Outputs are a
# header file (name specified on command line without the .h suffix),
# a file called "asn1_files" listing the names of the other output
# files, and a set of files containing C code generated by the
# compiler for each data type that the compiler found.
if (! -r $asn1_source || system($asn1_compile, $asn1_source, "asn1")) {
die("Couldn't compile ASN.1 source file $asn1_source\n");
}
my @files = ("asn1.h");
open(F, "asn1_files")
or die("Couldn't open asn1_files: $!\n");
push(@files, split)
while (<F>);
close(F);
unlink("asn1_files");
###
# Step 2: generate header block.
print(q~/*
* Copyright (C) 2006 Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: spnego_asn1.pl,v 1.4 2007/06/19 23:47:16 tbox Exp $ */
/*! \file
* \brief Method routines generated from SPNEGO ASN.1 module.
* See spnego_asn1.pl for details. Do not edit.
*/
~);
###
# Step 3: read and process each generated file, then delete it.
my $output;
for my $file (@files) {
my $is_static = 0;
system($indent, "-di1", "-ldi1", $file) == 0
or die("Couldn't indent $file");
unlink("$file.BAK");
open(F, $file)
or die("Couldn't open $file: $!");
while (<F>) {
# Symbol name fixups
s/heim_general_string/general_string/g;
s/heim_octet_string/octet_string/g;
s/heim_oid/oid/g;
s/heim_utf8_string/utf8_string/g;
# Convert all externs to statics
if (/^static/) {
$is_static = 1;
}
if (!/^typedef/ &&
!$is_static &&
/^[A-Za-z_][0-9A-Za-z_]*[ \t]*($|[^:0-9A-Za-z_])/) {
$_ = "static " . $_;
$is_static = 1;
}
if (/[{};]/) {
$is_static = 0;
}
# Suppress file inclusion, pass anything else through
if (!/#include/) {
$output .= $_;
}
}
close(F);
unlink($file);
}
# Step 4: Delete unused stuff to avoid code bloat and compiler warnings.
my @unused_functions = qw(ContextFlags2int
int2ContextFlags
asn1_ContextFlags_units
length_NegTokenInit
copy_NegTokenInit
length_NegTokenResp
copy_NegTokenResp
length_MechTypeList
length_MechType
copy_MechTypeList
length_ContextFlags
copy_ContextFlags
copy_MechType);
$output =~ s<^static [^\n]+\n$_\(.+?^}></* unused function: $_ */\n>ms
foreach (@unused_functions);
$output =~ s<^static .+$_\(.*\);$></* unused declaration: $_ */>m
foreach (@unused_functions);
$output =~ s<^static struct units ContextFlags_units\[\].+?^};>
</* unused variable: ContextFlags_units */>ms;
$output =~ s<^static int asn1_NegotiationToken_dummy_holder = 1;>
</* unused variable: asn1_NegotiationToken_dummy_holder */>ms;
$output =~ s<^static void\nfree_ContextFlags\(ContextFlags \* data\)\n{\n>
<$&\t(void)data;\n>ms;
# Step 5: Write the result.
print($output);
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