private static void RunHybridEncryptionWithIntegrityCheck()
{
Console.WriteLine("Hybrid Encryption With Integrity Check started");
Console.WriteLine();
Console.WriteLine(String.Format("Message before encryption: {0}", _hybridMessage));
// generate our private and public keys
RsaWithRsaParameterKey rsaParams = new RsaWithRsaParameterKey();
rsaParams.AssignNewKeys();
try
{
HybridEncryption HE = new HybridEncryption();
// encrypt the data
EncryptedPacket encryptedBlock = HE.EncryptDataWithIntegrity(Encoding.UTF8.GetBytes(_hybridMessage), rsaParams);
Console.WriteLine(String.Format("Message after encryption: {0}", Encoding.UTF8.GetString(encryptedBlock.EncryptedData)));
// decrypt the data
// we can put a break point here, alter the encrypted data of the packet before we pass it into the DecryptDataWithIntegrity() method, which will
// then do the compare of the HMAC hashes, fail and get caught in this try/catch
byte[] decryptedData = HE.DecryptDataWithIntegrity(encryptedBlock, rsaParams);
Console.WriteLine(String.Format("Message after decryption: {0}", Encoding.UTF8.GetString(decryptedData)));
}
catch (CryptographicException CE)
{
Console.WriteLine("Hybrid Encryption With Integrity failed, Error: " + CE.Message);
}
Console.WriteLine();
Console.WriteLine("Hybrid Encryption With Integrity Check ended");
}
private static void RunHybridEncryption()
{
Console.WriteLine("Hybrid Encryption started");
Console.WriteLine();
Console.WriteLine(String.Format("Message before encryption: {0}", _hybridMessage));
// generate our private and public keys
RsaWithRsaParameterKey rsaParams = new RsaWithRsaParameterKey();
rsaParams.AssignNewKeys();
HybridEncryption HE = new HybridEncryption();
// encrypt the data
EncryptedPacket encryptedBlock = HE.EncryptData(Encoding.UTF8.GetBytes(_hybridMessage), rsaParams);
Console.WriteLine(String.Format("Message after encryption: {0}", Encoding.UTF8.GetString(encryptedBlock.EncryptedData)));
byte[] decryptedData = HE.DecryptData(encryptedBlock, rsaParams);
Console.WriteLine(String.Format("Message after decryption: {0}", Encoding.UTF8.GetString(decryptedData)));
Console.WriteLine();
Console.WriteLine("Hybrid Encryption ended");
}
private static void RunHybridEncryptionWithDigitalSignature()
{
Console.WriteLine("Hybrid Encryption With Digital Signature started");
Console.WriteLine();
Console.WriteLine(String.Format("Message before encryption: {0}", _hybridWithSignatureMessage));
HybridEncryption HP = new HybridEncryption();
RsaWithRsaParameterKey rsaParams = new RsaWithRsaParameterKey();
rsaParams.AssignNewKeys();
DigitalSignatures DS = new DigitalSignatures();
DS.AssignNewKey();
try
{
EncryptedPacket encryptedBlock = HP.EncryptDataWithSignature(Encoding.UTF8.GetBytes(_hybridWithSignatureMessage), rsaParams, DS);
Console.WriteLine(String.Format("Message after encryption: {0}", Encoding.UTF8.GetString(encryptedBlock.EncryptedData)));
byte[] decryptedData = HP.DecryptDataWithSignature(encryptedBlock, rsaParams, DS);
Console.WriteLine(String.Format("Message after decryption: {0}", Encoding.UTF8.GetString(decryptedData)));
}
catch (CryptographicException CE)
{
Console.WriteLine(String.Format("Hybrid Encryption With Digital Signature failed, Error: {0}", CE.Message));
}
Console.WriteLine();
Console.WriteLine("Hybrid Encryption With Digital Signature ended");
}