#!/bin/bin/perl -w # # Copyright (C) 2006, 2007 Internet Systems Consortium, Inc. ("ISC") # # Permission to use, copy, modify, and/or 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 $ # 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);