summaryrefslogtreecommitdiffstats
path: root/apps/der_chop.in
blob: 9070b032fc38b79a86bdda406ee0f3a9b079fba2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
#!/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);
	}