Examples with IvParameterSpec javax.crypto.spec.IvParameterSpec used on opensource projects

Example 26 with IvParameterSpec

use of javax.crypto.spec.IvParameterSpec in project JamsMusicPlayer by psaravan.

the class Base64SharedPreferences method initCiphers.

protected void initCiphers(String secureKey) throws UnsupportedEncodingException, NoSuchAlgorithmException, InvalidKeyException, InvalidAlgorithmParameterException {
    IvParameterSpec ivSpec = getIv();
    SecretKeySpec secretKey = getSecretKey(secureKey);
    writer.init(Cipher.ENCRYPT_MODE, secretKey, ivSpec);
    reader.init(Cipher.DECRYPT_MODE, secretKey, ivSpec);
    keyWriter.init(Cipher.ENCRYPT_MODE, secretKey);
}

Example 27 with IvParameterSpec

use of javax.crypto.spec.IvParameterSpec in project ratpack by ratpack.

the class DefaultCrypto method decrypt.

@Override
public ByteBuf decrypt(ByteBuf message, ByteBufAllocator allocator) throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidAlgorithmParameterException, InvalidKeyException, BadPaddingException, ShortBufferException, IllegalBlockSizeException {
    Cipher cipher = Cipher.getInstance(algorithm);
    if (isInitializationVectorRequired) {
        int ivByteLength = message.readByte();
        byte[] iv = new byte[ivByteLength];
        message.readBytes(iv);
        cipher.init(Cipher.DECRYPT_MODE, secretKeySpec, new IvParameterSpec(iv));
    } else {
        cipher.init(Cipher.DECRYPT_MODE, secretKeySpec);
    }
    int messageLength = message.readableBytes();
    ByteBuf decMessage = allocator.buffer(cipher.getOutputSize(messageLength));
    ByteBuf byteBuf = message.readBytes(messageLength);
    try {
        int count = cipher.doFinal(byteBuf.nioBuffer(), decMessage.nioBuffer(0, messageLength));
        if (!hasPadding) {
            for (int i = count - 1; i >= 0; i--) {
                if (decMessage.getByte(i) == 0x00) {
                    count--;
                } else {
                    break;
                }
            }
        }
        decMessage.writerIndex(count);
        return decMessage;
    } catch (Exception e) {
        decMessage.release();
        throw e;
    } finally {
        byteBuf.release();
    }
}

Example 28 with IvParameterSpec

use of javax.crypto.spec.IvParameterSpec in project robovm by robovm.

the class PKCS12KeyStoreSpi method unwrapKey.

protected PrivateKey unwrapKey(AlgorithmIdentifier algId, byte[] data, char[] password, boolean wrongPKCS12Zero) throws IOException {
    ASN1ObjectIdentifier algorithm = algId.getAlgorithm();
    try {
        if (algorithm.on(PKCSObjectIdentifiers.pkcs_12PbeIds)) {
            PKCS12PBEParams pbeParams = PKCS12PBEParams.getInstance(algId.getParameters());
            PBEKeySpec pbeSpec = new PBEKeySpec(password);
            PrivateKey out;
            SecretKeyFactory keyFact = SecretKeyFactory.getInstance(algorithm.getId(), bcProvider);
            PBEParameterSpec defParams = new PBEParameterSpec(pbeParams.getIV(), pbeParams.getIterations().intValue());
            SecretKey k = keyFact.generateSecret(pbeSpec);
            ((BCPBEKey) k).setTryWrongPKCS12Zero(wrongPKCS12Zero);
            Cipher cipher = Cipher.getInstance(algorithm.getId(), bcProvider);
            cipher.init(Cipher.UNWRAP_MODE, k, defParams);
            // we pass "" as the key algorithm type as it is unknown at this point
            return (PrivateKey) cipher.unwrap(data, "", Cipher.PRIVATE_KEY);
        } else if (algorithm.equals(PKCSObjectIdentifiers.id_PBES2)) {
            PBES2Parameters alg = PBES2Parameters.getInstance(algId.getParameters());
            PBKDF2Params func = PBKDF2Params.getInstance(alg.getKeyDerivationFunc().getParameters());
            SecretKeyFactory keyFact = SecretKeyFactory.getInstance(alg.getKeyDerivationFunc().getAlgorithm().getId(), bcProvider);
            SecretKey k = keyFact.generateSecret(new PBEKeySpec(password, func.getSalt(), func.getIterationCount().intValue(), SecretKeyUtil.getKeySize(alg.getEncryptionScheme().getAlgorithm())));
            Cipher cipher = Cipher.getInstance(alg.getEncryptionScheme().getAlgorithm().getId(), bcProvider);
            cipher.init(Cipher.UNWRAP_MODE, k, new IvParameterSpec(ASN1OctetString.getInstance(alg.getEncryptionScheme().getParameters()).getOctets()));
            // we pass "" as the key algorithm type as it is unknown at this point
            return (PrivateKey) cipher.unwrap(data, "", Cipher.PRIVATE_KEY);
        }
    } catch (Exception e) {
        throw new IOException("exception unwrapping private key - " + e.toString());
    }
    throw new IOException("exception unwrapping private key - cannot recognise: " + algorithm);
}

Example 29 with IvParameterSpec

use of javax.crypto.spec.IvParameterSpec in project robovm by robovm.

the class BaseMac method engineInit.

protected void engineInit(Key key, AlgorithmParameterSpec params) throws InvalidKeyException, InvalidAlgorithmParameterException {
    CipherParameters param;
    if (key == null) {
        throw new InvalidKeyException("key is null");
    }
    if (key instanceof BCPBEKey) {
        BCPBEKey k = (BCPBEKey) key;
        if (k.getParam() != null) {
            param = k.getParam();
        } else if (params instanceof PBEParameterSpec) {
            param = PBE.Util.makePBEMacParameters(k, params);
        } else {
            throw new InvalidAlgorithmParameterException("PBE requires PBE parameters to be set.");
        }
    } else if (params instanceof IvParameterSpec) {
        param = new ParametersWithIV(new KeyParameter(key.getEncoded()), ((IvParameterSpec) params).getIV());
    } else if (params == null) {
        param = new KeyParameter(key.getEncoded());
    } else {
        throw new InvalidAlgorithmParameterException("unknown parameter type.");
    }
    macEngine.init(param);
}

Example 30 with IvParameterSpec

use of javax.crypto.spec.IvParameterSpec in project robovm by robovm.

the class OpenSSLCipher method engineInit.

@Override
protected void engineInit(int opmode, Key key, AlgorithmParameterSpec params, SecureRandom random) throws InvalidKeyException, InvalidAlgorithmParameterException {
    final byte[] iv;
    if (params instanceof IvParameterSpec) {
        IvParameterSpec ivParams = (IvParameterSpec) params;
        iv = ivParams.getIV();
    } else {
        iv = null;
    }
    engineInitInternal(opmode, key, iv, random);
}