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