Examples with AEADBlockCipher org.bouncycastle.crypto.modes.AEADBlockCipher used on opensource projects

Example 6 with AEADBlockCipher

use of org.bouncycastle.crypto.modes.AEADBlockCipher in project syncany by syncany.

the class AesGcmCipherSpec method newCipherOutputStream.

@Override
public OutputStream newCipherOutputStream(OutputStream underlyingOutputStream, byte[] secretKey, byte[] iv) throws CipherException {
    AEADBlockCipher cipher = new GCMBlockCipher(new AESEngine());
    cipher.init(true, new AEADParameters(new KeyParameter(secretKey), MAC_SIZE, iv));
    return new org.bouncycastle.crypto.io.CipherOutputStream(underlyingOutputStream, cipher);
}

Example 7 with AEADBlockCipher

use of org.bouncycastle.crypto.modes.AEADBlockCipher in project syncany by syncany.

the class TwofishGcmCipherSpec method newCipherOutputStream.

@Override
public OutputStream newCipherOutputStream(OutputStream underlyingOutputStream, byte[] secretKey, byte[] iv) throws CipherException {
    AEADBlockCipher cipher = new GCMBlockCipher(new TwofishEngine());
    cipher.init(true, new AEADParameters(new KeyParameter(secretKey), MAC_SIZE, iv));
    return new org.bouncycastle.crypto.io.CipherOutputStream(underlyingOutputStream, cipher);
}

Example 8 with AEADBlockCipher

use of org.bouncycastle.crypto.modes.AEADBlockCipher in project syncany by syncany.

the class AesGcmWithBcInputStreamTest method testE_BouncyCastleCipherInputStreamWithAesGcmLongPlaintext.

@Test
public void testE_BouncyCastleCipherInputStreamWithAesGcmLongPlaintext() throws InvalidKeyException, InvalidAlgorithmParameterException, IOException, NoSuchAlgorithmException, NoSuchProviderException, NoSuchPaddingException {
    // Encrypt (not interesting in this example)
    byte[] randomKey = createRandomArray(16);
    byte[] randomIv = createRandomArray(16);
    // <<<< 4080 bytes fails, 4079 bytes works! 	
    byte[] originalPlaintext = createRandomArray(4080);
    byte[] originalCiphertext = encryptWithAesGcm(originalPlaintext, randomKey, randomIv);
    // Decrypt with BouncyCastle implementation of CipherInputStream
    AEADBlockCipher cipher = new GCMBlockCipher(new AESEngine());
    cipher.init(false, new AEADParameters(new KeyParameter(randomKey), 128, randomIv));
    try {
        readFromStream(new org.bouncycastle.crypto.io.CipherInputStream(new ByteArrayInputStream(originalCiphertext), cipher));
        //             ^^^^^^^^^^^^^^^ INTERESTING PART ^^^^^^^^^^^^^^^^	
        //
        //  In this example, the BouncyCastle implementation of the CipherInputStream throws an ArrayIndexOutOfBoundsException.
        //  The only difference to the example above is that the plaintext is now 4080 bytes long! For 4079 bytes plaintexts,
        //  everything works just fine.
        System.out.println("Test E: org.bouncycastle.crypto.io.CipherInputStream:        OK, throws no exception");
    } catch (IOException e) {
        fail("Test E: org.bouncycastle.crypto.io.CipherInputStream:        NOT OK throws: " + e.getMessage());
    }
}

Example 9 with AEADBlockCipher

use of org.bouncycastle.crypto.modes.AEADBlockCipher in project syncany by syncany.

the class AesGcmWithBcInputStreamTest method testD_BouncyCastleCipherInputStreamWithAesGcm.

@Test
public void testD_BouncyCastleCipherInputStreamWithAesGcm() throws InvalidKeyException, InvalidAlgorithmParameterException, IOException, NoSuchAlgorithmException, NoSuchProviderException, NoSuchPaddingException {
    // Encrypt (not interesting in this example)
    byte[] randomKey = createRandomArray(16);
    byte[] randomIv = createRandomArray(16);
    byte[] originalPlaintext = "Confirm 100$ pay".getBytes("ASCII");
    byte[] originalCiphertext = encryptWithAesGcm(originalPlaintext, randomKey, randomIv);
    // Attack / alter ciphertext (an attacker would do this!) 
    byte[] alteredCiphertext = Arrays.clone(originalCiphertext);
    // <<< Change 100$ to 900$
    alteredCiphertext[8] = (byte) (alteredCiphertext[8] ^ 0x08);
    // Decrypt with BouncyCastle implementation of CipherInputStream
    AEADBlockCipher cipher = new GCMBlockCipher(new AESEngine());
    cipher.init(false, new AEADParameters(new KeyParameter(randomKey), 128, randomIv));
    try {
        readFromStream(new org.bouncycastle.crypto.io.CipherInputStream(new ByteArrayInputStream(alteredCiphertext), cipher));
        //             ^^^^^^^^^^^^^^^ INTERESTING PART ^^^^^^^^^^^^^^^^	
        //
        //  The BouncyCastle implementation of the CipherInputStream detects MAC verification errors and
        //  throws a InvalidCipherTextIOException if an error occurs. Nice! A more or less minor issue
        //  however is that it is incompatible with the standard JCE Cipher class from the javax.crypto 
        //  package. The new interface AEADBlockCipher must be used. The code below is not executed.		
        fail("Test D: org.bouncycastle.crypto.io.CipherInputStream:        NOT OK, tampering not detected");
    } catch (InvalidCipherTextIOException e) {
        System.out.println("Test D: org.bouncycastle.crypto.io.CipherInputStream:        OK, tampering detected");
    }
}

Example 10 with AEADBlockCipher

use of org.bouncycastle.crypto.modes.AEADBlockCipher in project Conversations by siacs.

the class AbstractConnectionManager method createInputStream.

public static Pair<InputStream, Integer> createInputStream(DownloadableFile file, boolean gcm) throws FileNotFoundException {
    FileInputStream is;
    int size;
    is = new FileInputStream(file);
    size = (int) file.getSize();
    if (file.getKey() == null) {
        return new Pair<InputStream, Integer>(is, size);
    }
    try {
        if (gcm) {
            AEADBlockCipher cipher = new GCMBlockCipher(new AESEngine());
            cipher.init(true, new AEADParameters(new KeyParameter(file.getKey()), 128, file.getIv()));
            InputStream cis = new org.bouncycastle.crypto.io.CipherInputStream(is, cipher);
            return new Pair<>(cis, cipher.getOutputSize(size));
        } else {
            IvParameterSpec ips = new IvParameterSpec(file.getIv());
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(file.getKey(), "AES"), ips);
            Log.d(Config.LOGTAG, "opening encrypted input stream");
            final int s = Config.REPORT_WRONG_FILESIZE_IN_OTR_JINGLE ? size : (size / 16 + 1) * 16;
            return new Pair<InputStream, Integer>(new CipherInputStream(is, cipher), s);
        }
    } catch (InvalidKeyException e) {
        return null;
    } catch (NoSuchAlgorithmException e) {
        return null;
    } catch (NoSuchPaddingException e) {
        return null;
    } catch (InvalidAlgorithmParameterException e) {
        return null;
    }
}