Master of Science thesis Fighting Spam

}
//pendingAccounts.aprove(pack.activationNumber);
Debugger.debug(getClass(), 1, "Verifued signature of activationNumber = " +
pack.activationNumber + ".");
Debugger.debug(getClass(), 1, "Generating certificate.");
PendingAccount p = pendingAccounts.get(pack.activationNumber);
createCertificate(pack.activationNumber, p.certificateSigningRequest);
pendingAccounts.remove(p);
Debugger.debug(getClass(), 1,
"Certificate for activationNumber: " + pack.activationNumber +
" Created successfully.");
return;
}
catch(Exception e)
{
Debugger.debug(getClass(), 1, "Exception: ", e);
Debugger.debug(getClass(), 1,
"Error generating certificate.");
return;
}
}
public synchronized NetPacket activationRequest(RegistrationInfoPacket pack)
{
try
{
Debugger.debug(getClass(), 1, "Attempting to retrieve certificate");
File generatedCert = new File(Config.OpenSSLpath + pack.activationNumber +
".crt");
Certificate certificate = FileHandler.importCertificate(generatedCert);
Debugger.debug(getClass(), 1, "Certificate found, returning it in an
ActivationCompletedPacket");
return new ActivationCompletedPacket(certificate);
}
catch(Exception ex)
{
Debugger.debug(getClass(), 1, "Exception: ", ex);
return new StatusPacket(false, "Error retrieving certificate " +
ex.getMessage());
}
}
public synchronized void createCertificate(long activationNumber, byte[]
certificateSigningRequest) throws
Exception
{
//String filesep = System.getProperty("file.separator");
Debugger.debug(getClass(), 1, "Creating cerfiticate from received
certificaterequest");
Debugger.debug(getClass(), 1, "Writing certificaterequest to file");
File certRequestFile = new File(Config.OpenSSLpath + "certificaterequest.csr");
FileOutputStream fos = new FileOutputStream(certRequestFile);
fos.write(certificateSigningRequest);
fos.close();
Runtime rt = Runtime.getRuntime();
String command = "openssl ca -in " + Config.OpenSSLpath + "certificaterequest.csr
-out " + Config.OpenSSLpath
+ activationNumber + ".crt -notext -batch -key spammail";
Debugger.debug(getClass(), 1, "Executing openssl command: " + command);
Process process = rt.exec(command);
File generatedCert = new File(Config.OpenSSLpath + activationNumber + ".crt");
Debugger.debug(getClass(), 1, "Waiting for certificatefile to be created and
proceed when it is.");
int checks = 0;
while(!generatedCert.exists() || generatedCert.length() == 0 ||
!generatedCert.canRead())
{
if(checks >= 30)
{
356