Example usage for org.bouncycastle.crypto.modes GCMBlockCipher getUnderlyingCipher

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.modes GCMBlockCipher getUnderlyingCipher.

Prototype

public BlockCipher getUnderlyingCipher() 

Source Link

Usage

From source file:dorkbox.util.crypto.AesTest.java

License:Apache License

@Test
public void AesWithIVGcm() throws IOException {
    byte[] bytes = "hello, my name is inigo montoya".getBytes();

    SecureRandom rand = new SecureRandom(entropySeed.getBytes());

    GCMBlockCipher aesEngine = new GCMBlockCipher(new AESFastEngine());

    byte[] key = new byte[32]; // 256bit key
    byte[] iv = new byte[aesEngine.getUnderlyingCipher().getBlockSize()];

    // note: the IV needs to be VERY unique!
    rand.nextBytes(key);/*from   w w w  .  ja v a  2  s.  c  o  m*/
    rand.nextBytes(iv);

    byte[] encryptAES = CryptoAES.encryptWithIV(aesEngine, key, iv, bytes, logger);
    byte[] decryptAES = CryptoAES.decryptWithIV(aesEngine, key, encryptAES, logger);

    if (Arrays.equals(bytes, encryptAES)) {
        fail("bytes should not be equal");
    }

    if (!Arrays.equals(bytes, decryptAES)) {
        fail("bytes not equal");
    }
}

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