freebsd-dev/crypto/openssl/apps/der_chop
2004-03-17 15:49:33 +00:00

306 lines
6.6 KiB
Perl

#!/usr/local/bin/perl
#
# der_chop ... this is one total hack that Eric is really not proud of
# so don't look at it and don't ask for support
#
# The "documentation" for this (i.e. all the comments) are my fault --tjh
#
# This program takes the "raw" output of derparse/asn1parse and
# converts it into tokens and then runs regular expression matches
# to try to figure out what to grab to get the things that are needed
# and it is possible that this will do the wrong thing as it is a *hack*
#
# SSLeay 0.5.2+ should have direct read support for x509 (via -inform NET)
# [I know ... promises promises :-)]
#
# To convert a Netscape Certificate:
# der_chop < ServerCert.der > cert.pem
# To convert a Netscape Key (and encrypt it again to protect it)
# rsa -inform NET -in ServerKey.der -des > key.pem
#
# 23-Apr-96 eay Added the extra ASN.1 string types, I still think this
# is an evil hack. If nothing else the parsing should
# be relative, not absolute.
# 19-Apr-96 tjh hacked (with eay) into 0.5.x format
#
# Tim Hudson
# tjh@cryptsoft.com
#
require 'getopts.pl';
$debug=0;
# this was the 0.4.x way of doing things ...
$cmd="derparse";
$x509_cmd="x509";
$crl_cmd="crl";
$rc4_cmd="rc4";
$md2_cmd="md2";
$md4_cmd="md4";
$rsa_cmd="rsa -des -inform der ";
# this was the 0.5.x way of doing things ...
$cmd="openssl asn1parse";
$x509_cmd="openssl x509";
$crl_cmd="openssl crl";
$rc4_cmd="openssl rc4";
$md2_cmd="openssl md2";
$md4_cmd="openssl md4";
$rsa_cmd="openssl rsa -des -inform der ";
&Getopts('vd:') || die "usage:$0 [-v] [-d num] file";
$depth=($opt_d =~ /^\d+$/)?$opt_d:0;
&init_der();
if ($#ARGV != -1)
{
foreach $file (@ARGV)
{
print STDERR "doing $file\n";
&dofile($file);
}
}
else
{
$file="/tmp/a$$.DER";
open(OUT,">$file") || die "unable to open $file:$!\n";
for (;;)
{
$i=sysread(STDIN,$b,1024*10);
last if ($i <= 0);
$i=syswrite(OUT,$b,$i);
}
&dofile($file);
unlink($file);
}
sub dofile
{
local($file)=@_;
local(@p);
$b=&load_file($file);
@p=&load_file_parse($file);
foreach $_ (@p)
{
($off,$d,$hl,$len)=&parse_line($_);
$d-=$depth;
next if ($d != 0);
next if ($len == 0);
$o=substr($b,$off,$len+$hl);
($str,@data)=&der_str($o);
print "$str\n" if ($opt_v);
if ($str =~ /^$crl/)
{
open(OUT,"|$crl_cmd -inform d -hash -issuer") ||
die "unable to run $crl_cmd:$!\n";
print OUT $o;
close(OUT);
}
elsif ($str =~ /^$x509/)
{
open(OUT,"|$x509_cmd -inform d -hash -subject -issuer")
|| die "unable to run $x509_cmd:$!\n";
print OUT $o;
close(OUT);
}
elsif ($str =~ /^$rsa/)
{
($type)=($data[3] =~ /OBJECT_IDENTIFIER :(.*)\s*$/);
next unless ($type eq "rsaEncryption");
($off,$d,$hl,$len)=&parse_line($data[5]);
$os=substr($o,$off+$hl,$len);
open(OUT,"|$rsa_cmd")
|| die "unable to run $rsa_cmd:$!\n";
print OUT $os;
close(OUT);
}
elsif ($str =~ /^0G-1D-1G/)
{
($off,$d,$hl,$len)=&parse_line($data[1]);
$os=substr($o,$off+$hl,$len);
print STDERR "<$os>\n" if $opt_v;
&do_certificate($o,@data)
if (($os eq "certificate") &&
($str =! /^0G-1D-1G-2G-3F-3E-2D/));
&do_private_key($o,@data)
if (($os eq "private-key") &&
($str =! /^0G-1D-1G-2G-3F-3E-2D/));
}
}
}
sub der_str
{
local($str)=@_;
local(*OUT,*IN,@a,$t,$d,$ret);
local($file)="/tmp/b$$.DER";
local(@ret);
open(OUT,">$file");
print OUT $str;
close(OUT);
open(IN,"$cmd -inform 'd' -in $file |") ||
die "unable to run $cmd:$!\n";
$ret="";
while (<IN>)
{
chop;
push(@ret,$_);
print STDERR "$_\n" if ($debug);
@a=split(/\s*:\s*/);
($d)=($a[1] =~ /d=\s*(\d+)/);
$a[2] =~ s/\s+$//;
$t=$DER_s2i{$a[2]};
$ret.="$d$t-";
}
close(IN);
unlink($file);
chop $ret;
$ret =~ s/(-3H(-4G-5F-5[IJKMQRS])+)+/-NAME/g;
$ret =~ s/(-3G-4B-4L)+/-RCERT/g;
return($ret,@ret);
}
sub init_der
{
$crl= "0G-1G-2G-3F-3E-2G-NAME-2L-2L-2G-RCERT-1G-2F-2E-1C";
$x509="0G-1G-2B-2G-3F-3E-2G-NAME-2G-3L-3L-2G-NAME-2G-3G-4F-4E-3C-1G-2F-2E-1C";
$rsa= "0G-1B-1G-2F-2E-1D";
%DER_i2s=(
# SSLeay 0.4.x has this list
"A","EOC",
"B","INTEGER",
"C","BIT STRING",
"D","OCTET STRING",
"E","NULL",
"F","OBJECT",
"G","SEQUENCE",
"H","SET",
"I","PRINTABLESTRING",
"J","T61STRING",
"K","IA5STRING",
"L","UTCTIME",
"M","NUMERICSTRING",
"N","VIDEOTEXSTRING",
"O","GENERALIZEDTIME",
"P","GRAPHICSTRING",
"Q","ISO64STRING",
"R","GENERALSTRING",
"S","UNIVERSALSTRING",
# SSLeay 0.5.x changed some things ... and I'm
# leaving in the old stuff but adding in these
# to handle the new as well --tjh
# - Well I've just taken them out and added the extra new
# ones :-) - eay
);
foreach (keys %DER_i2s)
{ $DER_s2i{$DER_i2s{$_}}=$_; }
}
sub parse_line
{
local($_)=@_;
return(/\s*(\d+):d=\s*(\d+)\s+hl=\s*(\d+)\s+l=\s*(\d+|inf)\s/);
}
# 0:d=0 hl=4 l=377 cons: univ: SEQUENCE
# 4:d=1 hl=2 l= 11 prim: univ: OCTET_STRING
# 17:d=1 hl=4 l=360 cons: univ: SEQUENCE
# 21:d=2 hl=2 l= 12 cons: univ: SEQUENCE
# 23:d=3 hl=2 l= 8 prim: univ: OBJECT_IDENTIFIER :rc4
# 33:d=3 hl=2 l= 0 prim: univ: NULL
# 35:d=2 hl=4 l=342 prim: univ: OCTET_STRING
sub do_private_key
{
local($data,@struct)=@_;
local($file)="/tmp/b$$.DER";
local($off,$d,$hl,$len,$_,$b,@p,$s);
($type)=($struct[4] =~ /OBJECT_IDENTIFIER :(.*)\s*$/);
if ($type eq "rc4")
{
($off,$d,$hl,$len)=&parse_line($struct[6]);
open(OUT,"|$rc4_cmd >$file") ||
die "unable to run $rc4_cmd:$!\n";
print OUT substr($data,$off+$hl,$len);
close(OUT);
$b=&load_file($file);
unlink($file);
($s,@p)=&der_str($b);
die "unknown rsa key type\n$s\n"
if ($s ne '0G-1B-1G-2F-2E-1D');
local($off,$d,$hl,$len)=&parse_line($p[5]);
$b=substr($b,$off+$hl,$len);
($s,@p)=&der_str($b);
open(OUT,"|$rsa_cmd") || die "unable to run $rsa_cmd:$!\n";
print OUT $b;
close(OUT);
}
else
{
print "'$type' is unknown\n";
exit(1);
}
}
sub do_certificate
{
local($data,@struct)=@_;
local($file)="/tmp/b$$.DER";
local($off,$d,$hl,$len,$_,$b,@p,$s);
($off,$d,$hl,$len)=&parse_line($struct[2]);
$b=substr($data,$off,$len+$hl);
open(OUT,"|$x509_cmd -inform d") || die "unable to run $x509_cmd:$!\n";
print OUT $b;
close(OUT);
}
sub load_file
{
local($file)=@_;
local(*IN,$r,$b,$i);
$r="";
open(IN,"<$file") || die "unable to open $file:$!\n";
for (;;)
{
$i=sysread(IN,$b,10240);
last if ($i <= 0);
$r.=$b;
}
close(IN);
return($r);
}
sub load_file_parse
{
local($file)=@_;
local(*IN,$r,@ret,$_,$i,$n,$b);
open(IN,"$cmd -inform d -in $file|")
|| die "unable to run der_parse\n";
while (<IN>)
{
chop;
push(@ret,$_);
}
return($r,@ret);
}