vpnmain.cgi: Fixes bug#13138 - root/host certificate set fails to be created

  - The change to openssl-3.x results in the openssl commands that start with ca failing
   with the error message
     OpenSSL produced an error: <br>40E7B4719B730000:error:0700006C:configuration file
     routines:NCONF_get_string:no value:crypto/conf/conf_lib.c:315:group=<NULL>
     name=unique_subject
- The fix for this is to include the unique_subject = yes line into
   /var/ipfire/certs/index.txt.attr
- Additionally, based on the learnings from bug#13137 on OpenVPN, any openssl commands
   dealing with pkcs12 (.p12) files that were created with openssl-1.1.1x fail when being
   accessed with openssl-3.x due to the no longer supported algorithm. These can be
   accessed if the -legacy option is added to every openssl command dealing with pkcs12

Fixes: Bug#13138
Tested-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
---
 html/cgi-bin/vpnmain.cgi | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)
  

Reviewed-by: Michael Tremer <michael.tremer@ipfire.org>

I am not sure what I can say about this. I suppose it is another dirty fix that I would prefer not to have?

Thank you for investigating!

> On 3 Jun 2023, at 15:05, Adolf Belka <adolf.belka@ipfire.org> wrote:
> 
> - The change to openssl-3.x results in the openssl commands that start with ca failing
>   with the error message
>     OpenSSL produced an error: <br>40E7B4719B730000:error:0700006C:configuration file
>     routines:NCONF_get_string:no value:crypto/conf/conf_lib.c:315:group=<NULL>
>     name=unique_subject
> - The fix for this is to include the unique_subject = yes line into
>   /var/ipfire/certs/index.txt.attr
> - Additionally, based on the learnings from bug#13137 on OpenVPN, any openssl commands
>   dealing with pkcs12 (.p12) files that were created with openssl-1.1.1x fail when being
>   accessed with openssl-3.x due to the no longer supported algorithm. These can be
>   accessed if the -legacy option is added to every openssl command dealing with pkcs12
> 
> Fixes: Bug#13138
> Tested-by: Adolf Belka <adolf.belka@ipfire.org>
> Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
> ---
> html/cgi-bin/vpnmain.cgi | 15 ++++++++-------
> 1 file changed, 8 insertions(+), 7 deletions(-)
> 
> diff --git a/html/cgi-bin/vpnmain.cgi b/html/cgi-bin/vpnmain.cgi
> index 6c1fd4cf0..f2aeecdf9 100644
> --- a/html/cgi-bin/vpnmain.cgi
> +++ b/html/cgi-bin/vpnmain.cgi
> @@ -193,7 +193,7 @@ sub cleanssldatabase {
> close FILE;
> }
> if (open(FILE, ">${General::swroot}/certs/index.txt.attr")) {
> - print FILE "";
> + print FILE "unique_subject = yes";
> close FILE;
> }
> unlink ("${General::swroot}/certs/index.txt.old");
> @@ -213,6 +213,7 @@ sub newcleanssldatabase {
> }
> if (! -s ">${General::swroot}/certs/index.txt.attr") {
> open(FILE, ">${General::swroot}/certs/index.txt.attr");
> + print FILE "unique_subject = yes";
> close(FILE);
> }
> unlink ("${General::swroot}/certs/index.txt.old");
> @@ -907,7 +908,7 @@ END
> # Extract the CA certificate from the file
> &General::log("ipsec", "Extracting caroot from p12...");
> if (open(STDIN, "-|")) {
> - my $opt = " pkcs12 -cacerts -nokeys";
> + my $opt = " pkcs12 -legacy -cacerts -nokeys";
> $opt .= " -in $filename";
> $opt .= " -out /tmp/newcacert";
> $errormessage = &callssl ($opt);
> @@ -920,7 +921,7 @@ END
> if (!$errormessage) {
> &General::log("ipsec", "Extracting host cert from p12...");
> if (open(STDIN, "-|")) {
> - my $opt = " pkcs12 -clcerts -nokeys";
> + my $opt = " pkcs12 -legacy -clcerts -nokeys";
> $opt .= " -in $filename";
> $opt .= " -out /tmp/newhostcert";
> $errormessage = &callssl ($opt);
> @@ -934,7 +935,7 @@ END
> if (!$errormessage) {
> &General::log("ipsec", "Extracting private key from p12...");
> if (open(STDIN, "-|")) {
> - my $opt = " pkcs12 -nocerts -nodes";
> + my $opt = " pkcs12 -legacy -nocerts -nodes";
> $opt .= " -in $filename";
> $opt .= " -out /tmp/newhostkey";
> $errormessage = &callssl ($opt);
> @@ -1939,7 +1940,7 @@ END
> # Extract the CA certificate from the file
> &General::log("ipsec", "Extracting caroot from p12...");
> if (open(STDIN, "-|")) {
> - my $opt = " pkcs12 -cacerts -nokeys";
> + my $opt = " pkcs12 -legacy -cacerts -nokeys";
> $opt .= " -in $filename";
> $opt .= " -out /tmp/newcacert";
> $errormessage = &callssl ($opt);
> @@ -1952,7 +1953,7 @@ END
> if (!$errormessage) {
> &General::log("ipsec", "Extracting host cert from p12...");
> if (open(STDIN, "-|")) {
> - my $opt = " pkcs12 -clcerts -nokeys";
> + my $opt = " pkcs12 -legacy -clcerts -nokeys";
> $opt .= " -in $filename";
> $opt .= " -out /tmp/newhostcert";
> $errormessage = &callssl ($opt);
> @@ -2197,7 +2198,7 @@ END
> 
> # Create the pkcs12 file
> &General::log("ipsec", "Packing a pkcs12 file...");
> - $opt = " pkcs12 -export";
> + $opt = " pkcs12 -legacy -export";
> $opt .= " -inkey ${General::swroot}/certs/$cgiparams{'NAME'}key.pem";
> $opt .= " -in ${General::swroot}/certs/$cgiparams{'NAME'}cert.pem";
> $opt .= " -name \"$cgiparams{'NAME'}\"";
> -- 
> 2.40.1
>