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

Example 26 with GCMBlockCipher

use of org.bouncycastle.crypto.modes.GCMBlockCipher 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 27 with GCMBlockCipher

use of org.bouncycastle.crypto.modes.GCMBlockCipher 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 28 with GCMBlockCipher

use of org.bouncycastle.crypto.modes.GCMBlockCipher in project Pix-Art-Messenger by kriztan.

the class AbstractConnectionManager method createOutputStream.

private static OutputStream createOutputStream(DownloadableFile file, boolean gcm, boolean append) {
    FileOutputStream os;
    try {
        os = new FileOutputStream(file, append);
        if (file.getKey() == null) {
            return os;
        }
    } catch (FileNotFoundException e) {
        return null;
    }
    try {
        if (gcm) {
            AEADBlockCipher cipher = new GCMBlockCipher(new AESEngine());
            cipher.init(false, new AEADParameters(new KeyParameter(file.getKey()), 128, file.getIv()));
            return new org.bouncycastle.crypto.io.CipherOutputStream(os, cipher);
        } else {
            IvParameterSpec ips = new IvParameterSpec(file.getIv());
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(file.getKey(), "AES"), ips);
            Log.d(Config.LOGTAG, "opening encrypted output stream");
            return new CipherOutputStream(os, cipher);
        }
    } catch (InvalidKeyException e) {
        return null;
    } catch (NoSuchAlgorithmException e) {
        return null;
    } catch (NoSuchPaddingException e) {
        return null;
    } catch (InvalidAlgorithmParameterException e) {
        return null;
    }
}

Example 29 with GCMBlockCipher

use of org.bouncycastle.crypto.modes.GCMBlockCipher in project Pix-Art-Messenger by kriztan.

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");
            return new Pair<InputStream, Integer>(new CipherInputStream(is, cipher), (size / 16 + 1) * 16);
        }
    } catch (InvalidKeyException e) {
        return null;
    } catch (NoSuchAlgorithmException e) {
        return null;
    } catch (NoSuchPaddingException e) {
        return null;
    } catch (InvalidAlgorithmParameterException e) {
        return null;
    }
}