Fix c_rehash script, add -fingerprint option to crl.

CHANGES

@@ -4,6 +4,12 @@
 
  Changes between 0.9.5a and 0.9.6  [xx XXX 2000]
 
+  *) Enhance c_rehash script. Old version would mishandle certificates
+     with the same subject name hash and wouldn't handle CRLs at all.
+     Added -fingerprint option to crl utility, to support new c_rehash
+     features.
+     [Steve Henson]
+
   *) Eliminate non-ANSI declarations in crypto.h and stack.h.
 	 [Ulf Möller]
 

Configure

@@ -890,12 +890,13 @@ EOF
 	### (system 'make depend') == 0 or exit $? if $depflags ne "";
 	# Run "make depend" manually if you want to be able to delete
 	# the source code files of ciphers you left out.
-	&dofile("tools/c_rehash",$openssldir,'^DIR=',	'DIR=%s',);
 	if ( $perl =~ m@^/@) {
+	    &dofile("tools/c_rehash",$perl,'^#!/', '#!%s','^my \$dir;$', 'my $dir = "' . $openssldir . '";');
 	    &dofile("apps/der_chop",$perl,'^#!/', '#!%s');
 	    &dofile("apps/CA.pl",$perl,'^#!/', '#!%s');
 	} else {
 	    # No path for Perl known ...
+	    &dofile("tools/c_rehash",'/usr/local/bin/perl','^#!/', '#!%s','^my \$dir;$', 'my $dir = "' . $openssldir . '";');
 	    &dofile("apps/der_chop",'/usr/local/bin/perl','^#!/', '#!%s');
 	    &dofile("apps/CA.pl",'/usr/local/bin/perl','^#!/', '#!%s');
 	}	    

Makefile.org

@@ -262,7 +262,7 @@ dclean:
 
 rehash: rehash.time
 rehash.time: certs
-	@(OPENSSL="`pwd`/apps/openssl"; export OPENSSL; sh tools/c_rehash certs)
+	@(OPENSSL="`pwd`/apps/openssl"; export OPENSSL; $(PERL) tools/c_rehash certs)
 	touch rehash.time
 
 test:   tests

apps/Makefile.ssl

@@ -135,7 +135,7 @@ $(DLIBCRYPTO):
 $(PROGRAM): progs.h $(E_OBJ) $(PROGRAM).o $(DLIBCRYPTO) $(DLIBSSL)
 	$(RM) $(PROGRAM)
 	$(CC) -o $(PROGRAM) $(CFLAGS) $(PROGRAM).o $(E_OBJ) $(PEX_LIBS) $(LIBSSL) $(LIBCRYPTO) $(EX_LIBS)
-	@(cd ..; OPENSSL="`pwd`/apps/openssl"; export OPENSSL; sh tools/c_rehash certs)
+	@(cd ..; OPENSSL="`pwd`/apps/openssl"; export OPENSSL; $(PERL) tools/c_rehash certs)
 
 progs.h: progs.pl
 	$(PERL) progs.pl $(E_EXE) >progs.h

apps/crl.c

@@ -104,6 +104,7 @@ int MAIN(int argc, char **argv)
 	int informat,outformat;
 	char *infile=NULL,*outfile=NULL;
 	int hash=0,issuer=0,lastupdate=0,nextupdate=0,noout=0,text=0;
+	int fingerprint = 0;
 	char **pp,buf[256];
 	X509_STORE *store = NULL;
 	X509_STORE_CTX ctx;
@@ -111,6 +112,7 @@ int MAIN(int argc, char **argv)
 	X509_OBJECT xobj;
 	EVP_PKEY *pkey;
 	int do_ver = 0;
+	const EVP_MD *md_alg,*digest=EVP_md5();
 
 	apps_startup();
 
@@ -183,6 +185,13 @@ int MAIN(int argc, char **argv)
 			nextupdate= ++num;
 		else if (strcmp(*argv,"-noout") == 0)
 			noout= ++num;
+		else if (strcmp(*argv,"-fingerprint") == 0)
+			fingerprint= ++num;
+		else if ((md_alg=EVP_get_digestbyname(*argv + 1)))
+			{
+			/* ok */
+			digest=md_alg;
+			}
 		else
 			{
 			BIO_printf(bio_err,"unknown option %s\n",*argv);
@@ -274,6 +283,26 @@ bad:
 					BIO_printf(bio_out,"NONE");
 				BIO_printf(bio_out,"\n");
 				}
+			if (fingerprint == i)
+				{
+				int j;
+				unsigned int n;
+				unsigned char md[EVP_MAX_MD_SIZE];
+
+				if (!X509_CRL_digest(x,digest,md,&n))
+					{
+					BIO_printf(bio_err,"out of memory\n");
+					goto end;
+					}
+				BIO_printf(bio_out,"%s Fingerprint=",
+						OBJ_nid2sn(EVP_MD_type(digest)));
+				for (j=0; j<(int)n; j++)
+					{
+					BIO_printf(bio_out,"%02X%c",md[j],
+						(j+1 == (int)n)
+						?'\n':':');
+					}
+				}
 			}
 		}
 

crypto/x509/x509.h

@@ -660,6 +660,8 @@ int X509_CRL_sign(X509_CRL *x, EVP_PKEY *pkey, const EVP_MD *md);
 int NETSCAPE_SPKI_sign(NETSCAPE_SPKI *x, EVP_PKEY *pkey, const EVP_MD *md);
 
 int X509_digest(X509 *data,const EVP_MD *type,unsigned char *md,unsigned int *len);
+int X509_CRL_digest(X509_CRL *data,const EVP_MD *type,unsigned char *md,unsigned int *len);
+int X509_REQ_digest(X509_REQ *data,const EVP_MD *type,unsigned char *md,unsigned int *len);
 int X509_NAME_digest(X509_NAME *data,const EVP_MD *type,
 	unsigned char *md,unsigned int *len);
 #endif

crypto/x509/x_all.c

@@ -417,6 +417,18 @@ int X509_digest(X509 *data, const EVP_MD *type, unsigned char *md,
 	return(ASN1_digest((int (*)())i2d_X509,type,(char *)data,md,len));
 	}
 
+int X509_CRL_digest(X509_CRL *data, const EVP_MD *type, unsigned char *md,
+	     unsigned int *len)
+	{
+	return(ASN1_digest((int (*)())i2d_X509_CRL,type,(char *)data,md,len));
+	}
+
+int X509_REQ_digest(X509_REQ *data, const EVP_MD *type, unsigned char *md,
+	     unsigned int *len)
+	{
+	return(ASN1_digest((int (*)())i2d_X509_REQ,type,(char *)data,md,len));
+	}
+
 int X509_NAME_digest(X509_NAME *data, const EVP_MD *type, unsigned char *md,
 	     unsigned int *len)
 	{

tools/c_rehash.in

-#!/bin/sh
-#
-# redo the hashes for the certificates in your cert path or the ones passed
-# on the command line.
-#
-
-if [ "$OPENSSL"x = "x" -o ! -x "$OPENSSL" ]; then
-	OPENSSL='openssl'
-	export OPENSSL
-fi
-DIR=/usr/local/ssl
-PATH=$DIR/bin:$PATH
-
-if [ ! -f "$OPENSSL" ]; then
-    found=0
-    for dir in . `echo $PATH | sed -e 's/:/ /g'`; do
-        if [ -f "$dir/$OPENSSL" ]; then
-            found=1
-            break
-        fi
-    done
-    if [ $found = 0 ]; then
-        echo "c_rehash: rehashing skipped ('openssl' program not available)" 1>&2
-        exit 0
-    fi
-fi
-
-SSL_DIR=$DIR/certs
-
-if [ "$*" = "" ]; then
-	CERTS=${*:-${SSL_CERT_DIR:-$SSL_DIR}}
-else
-	CERTS=$*
-fi
-
-IFS=': '
-for i in $CERTS
-do
-  (
-  IFS=' '
-  if [ -d $i -a -w $i ]; then
-    cd $i
-    echo "Doing $i"
-    for i in *.pem
-    do
-      if [ $i != '*.pem' ]; then
-        h=`$OPENSSL x509 -hash -noout -in $i`
-	if [ "x$h" = "x" ]; then
-	  echo $i does not contain a certificate
-	else
-          if [ -f $h.0 ]; then
-            /bin/rm -f $h.0
-          fi
-          echo "$i => $h.0"
-          ln -s $i $h.0
-	fi
-      fi
-    done
-  fi
-  )
-done
+#!/usr/local/bin/perl
+
+
+# Perl c_rehash script, scan all files in a directory
+# and add symbolic links to their hash values.
+
+my $openssl;
+
+my $dir;
+
+if(defined $ENV{OPENSSL}) {
+	$openssl = $ENV{OPENSSL};
+} else {
+	$openssl = "openssl";
+	$ENV{OPENSSL} = $openssl;
+}
+
+$ENV{PATH} .= ":$dir/bin";
+
+if(! -f $openssl) {
+	my $found = 0;
+	foreach (split /:/, $ENV{PATH}) {
+		if(-f "$_/$openssl") {
+			$found = 1;
+			last;
+		}	
+	}
+	if($found == 0) {
+		print STDERR "c_rehash: rehashing skipped ('openssl' program not available)\n";
+		exit 0;
+	}
+}
+
+if(@ARGV) {
+	@dirlist = @ARGV;
+} elsif($ENV{SSL_CERT_DIR}) {
+	@dirlist = split /:/, $ENV{SSL_CERT_DIR};
+} else {
+	$dirlist[0] = "$dir/certs";
+}
+
+
+foreach (@dirlist) {
+	if(-d $_ and -w $_) {
+		hash_dir($_);
+	}
+}
+
+sub hash_dir {
+	my %hashlist;
+	print "Doing $_[0]\n";
+	chdir $_[0];
+	opendir(DIR, ".");
+	my @flist = readdir(DIR);
+	# Delete any existing symbolic links
+	foreach (grep {/^[\da-f]+\.r{0,1}\d+$/} @flist) {
+		if(-l $_) {
+			unlink $_;
+		}
+	}
+	closedir DIR;
+	FILE: foreach $fname (grep {/\.pem$/} @flist) {
+		# Check to see if certificates and/or CRLs present.
+		my ($cert, $crl) = check_file($fname);
+		if(!$cert && !$crl) {
+			print STDERR "WARNING: $fname does not contain a certificate or CRL: skipping\n";
+			next;
+		}
+		link_hash_cert($fname) if($cert);
+		link_hash_crl($fname) if($crl);
+	}
+}
+
+sub check_file {
+	my ($is_cert, $is_crl) = (0,0);
+	my $fname = $_[0];
+	open IN, $fname;
+	while(<IN>) {
+		if(/^-----BEGIN (.*)-----/) {
+			my $hdr = $1;
+			if($hdr =~ /^(X509 |TRUSTED |)CERTIFICATE$/) {
+				$is_cert = 1;
+				last if($is_crl);
+			} elsif($hdr eq "X509 CRL") {
+				$is_crl = 1;
+				last if($is_cert);
+			}
+		}
+	}
+	close IN;
+	return ($is_cert, $is_crl);
+}
+
+
+# Link a certificate to its subject name hash value, each hash is of
+# the form <hash>.<n> where n is an integer. If the hash value already exists
+# then we need to up the value of n, unless its a duplicate in which
+# case we skip the link. We check for duplicates by comparing the
+# certificate fingerprints
+
+sub link_hash_cert {
+		my $fname = $_[0];
+		my ($hash, $fprint) = `$openssl x509 -hash -fingerprint -noout -in $fname`;
+		chomp $hash;
+		chomp $fprint;
+		$fprint =~ s/^.*=//;
+		$fprint =~ tr/://d;
+		my $suffix = 0;
+		# Search for an unused hash filename
+		while(exists $hashlist{"$hash.$suffix"}) {
+			# Hash matches: if fingerprint matches its a duplicate cert
+			if($hashlist{"$hash.$suffix"} eq $fprint) {
+				print STDERR "WARNING: Skipping duplicate certificate $fname\n";
+				return;
+			}
+			$suffix++;
+		}
+		$hash .= ".$suffix";
+		print "$fname => $hash\n";
+		symlink $fname, $hash;
+		$hashlist{$hash} = $fprint;
+}
+
+# Same as above except for a CRL. CRL links are of the form <hash>.r<n>
+
+sub link_hash_crl {
+		my $fname = $_[0];
+		my ($hash, $fprint) = `$openssl crl -hash -fingerprint -noout -in $fname`;
+		chomp $hash;
+		chomp $fprint;
+		$fprint =~ s/^.*=//;
+		$fprint =~ tr/://d;
+		my $suffix = 0;
+		# Search for an unused hash filename
+		while(exists $hashlist{"$hash.r$suffix"}) {
+			# Hash matches: if fingerprint matches its a duplicate cert
+			if($hashlist{"$hash.r$suffix"} eq $fprint) {
+				print STDERR "WARNING: Skipping duplicate CRL $fname\n";
+				return;
+			}
+			$suffix++;
+		}
+		$hash .= ".r$suffix";
+		print "$fname => $hash\n";
+		symlink $fname, $hash;
+		$hashlist{$hash} = $fprint;
+}
+