Add link to entropy page and show if there is hardware support available.

[people/pmueller/ipfire-2.x.git] / html / cgi-bin / entropy.cgi

diff --git a/html/cgi-bin/entropy.cgi b/html/cgi-bin/entropy.cgi
index 9362e78bea2e631d295a64ff6272bf2a7d847ba3..bd3de82f8ceae283cff7a8b9129c52e8cd1ab5de 100755 (executable)
--- a/html/cgi-bin/entropy.cgi
+++ b/html/cgi-bin/entropy.cgi
@@ -48,6 +48,42 @@ if ( $querry[0] ne~ "") {
        &Graphs::makegraphbox("entropy.cgi", "day", '', 350);
        &Header::closebox();
 
+       # Check for hardware support.
+       my $message;
+       my $message_colour = $Header::colourred;
+       if (&has_hwrng()) {
+               $message = $Lang::tr{'system has hwrng'};
+               $message_colour = $Header::colourgreen;
+       } elsif (&has_rdrand()) {
+               $message = $Lang::tr{'system has rdrand'};
+               $message_colour = $Header::colourgreen;
+       } else {
+               $message = $Lang::tr{'no hardware random number generator'};
+       }
+
+       &Header::openbox('100%', 'center', $Lang::tr{'hardware support'});
+       print <<EOF;
+               <p style="color: $message_colour; text-align: center;">$message</p>
+EOF
+       &Header::closebox();
+
        &Header::closebigbox();
        &Header::closepage();
 }
+
+sub has_hwrng() {
+       return (-c "/dev/hwrng");
+}
+
+sub has_rdrand() {
+       open(FILE, "/proc/cpuinfo") or return 0;
+       my @cpuinfo = <FILE>;
+       close(FILE);
+
+       my @result = grep(/rdrand/, @cpuinfo);
+       if (@result) {
+               return 1;
+       }
+
+       return 0;
+}