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106 lines
2.1 KiB
Perl
Executable File
106 lines
2.1 KiB
Perl
Executable File
#!/usr/bin/perl
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#
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# This is an example of Perl script maintaining dynamic shared secret
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# database for the REST API
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#
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use strict;
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use warnings;
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use DBI;
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use HTTP::Request::Common;
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my $DBNAME="turn";
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my $DBUSERNAME="turn";
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my $DBPWD="turn";
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my $DBHOST="localhost";
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my $webserver = 'http://example.com/';
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my $old_secret = "";
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my $current_secret="";
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my $INTERVAL=3600;
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my $dbh;
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$dbh = DBI->connect("DBI:mysql:$DBNAME;host=$DBHOST", $DBUSERNAME, $DBPWD)
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|| die "Could not connect to database: $DBI::errstr";
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$dbh->do('CREATE TABLE IF NOT EXISTS turn_secret (value varchar(512))');
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my $c = $dbh->do("delete from turn_secret");
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print "Deleted $c rows\n";
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$dbh->disconnect();
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do {
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$dbh = DBI->connect("DBI:mysql:$DBNAME;host=$DBHOST", $DBUSERNAME, $DBPWD)
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|| die "Could not connect to database: $DBI::errstr";
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$dbh->do('CREATE TABLE IF NOT EXISTS turn_secret (value varchar(512))');
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if(length($current_secret)) {
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if(length($old_secret)) {
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remove_secret($dbh, $old_secret);
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}
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$old_secret=$current_secret;
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}
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print "CURRENT SECRET TO BE (RE)GENERATED\n";
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$current_secret = generate_secret();
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insert_secret($dbh, $current_secret);
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$dbh->disconnect();
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#
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# Web server interaction example:
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# Here we can put code to submit this secret to the web server:
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#
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my $req = POST($webserver, Content => [param => $current_secret]);
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$req->method('PUT');
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print $req->as_string,"\n";
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#
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# Alternatively, you can use this link for compute-on-demand:
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# https://github.com/alfreddatakillen/computeengineondemand
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#
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# write your code here.
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#
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sleep($INTERVAL);
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} while(1);
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sub remove_secret {
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my $dbh = shift;
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my $secret=shift;
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my $c = $dbh->do("delete from turn_secret where value = '$secret'");
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print "Deleted $c rows\n";
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}
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sub insert_secret {
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my $dbh = shift;
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my $secret=shift;
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my $c = $dbh->do("insert into turn_secret values('$secret')");
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print "Inserted $c rows\n";
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}
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sub generate_secret {
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my @chars = ('0'..'9', 'A'..'F');
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my $len = 8;
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my $string;
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while($len--){ $string .= $chars[rand @chars] };
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return $string;
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}
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