BZIP2 compress and AES Encrypt a byte array.

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This sample program demonstrates how to BZIP2 compress and then encrypt data.

// The Chilkat Encryption library is also available as an ActiveX component
// or .NET class with the identical set of methods and properties.

// BZIP2 compress and AES Encrypt a byte array.
// 
void CryptExample(void)
    {
    CkCrypt2 crypt;
    
    // Any string passed to UnlockComponent automatically begins the 30-day trial.
    crypt.UnlockComponent("30-day trial");

    // Use BZIP2 compression.
    crypt.put_CompressionAlgorithm("bzip2");

    // Use AES encryption.
    crypt.put_CryptAlgorithm("aes");
    
    // Use 128-bit AES encryption.
    // It is also possible to use 192-bit or 256-bit AES encryption.
    crypt.put_KeyLength(128);

    // Create a binary secret key from a password string.
    CkByteData secretKey;
    crypt.GenerateSecretKey("myPassword",secretKey);
    crypt.put_SecretKey(secretKey);

    // Note: we could just as well set the binary secret key directly.
    // We need a binary key of 16 bytes (16 bytes * 8 bits/byte = 128 bits)
    // Example:
    // int i;
    // unsigned char sKey[16];
    // for (i=0; i<16; i++) sKey[i] = i;
    // secretKey.append(sKey,16);

    // Get some data to encrypt.
    CkByteData inData;
    // This XML file can be downloaded from:
    // http://www.chilkatsoft.com/hamlet.xml
    inData.loadFile("hamlet.xml");

    CkByteData compressedData;
    crypt.CompressBytes(inData,compressedData);

    printf("raw data size = %d, compressed size = %d\n\n",
	inData.getSize(),compressedData.getSize());
    
    // Encrypt the compressed data.
    CkByteData encryptedData;
    crypt.EncryptBytes(compressedData,encryptedData);

    // AES Encryption pads to a multiple of 16 bytes.
    printf("Encrypted size = %d\n\n",encryptedData.getSize());

    // Decrypt to compressed data.
    CkByteData decryptedData;
    crypt.DecryptBytes(encryptedData,decryptedData);

    CkByteData outData;
    crypt.InflateBytes(decryptedData,outData);

    outData.appendChar('\0');
    printf("Output:\n%s\n",outData.getData());

    // PRINTS:
    // raw data size = 279658, compressed size = 57568

    // Encrypted size = 57584

    // Output:
    // <?xml version="1.0"?>

    // <PLAY>
    // <TITLE AUTHOR="William Shakespeare">The Tragedy of Hamlet, Prince of Denmark</TITLE>
    // ...