Example usage for org.bouncycastle.crypto.engines AESEngine AESEngine

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.engines AESEngine AESEngine.

Prototype

public AESEngine() 

Source Link

Document

default constructor - 128 bit block size.

Usage

From source file:org.syncany.tests.crypto.AesGcmWithBcInputStreamTest.java

License:Open Source License

@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);
    byte[] originalPlaintext = createRandomArray(4080); // <<<< 4080 bytes fails, 4079 bytes works!    
    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 {//from  w w  w.  ja  v  a 2s . co m
        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());
    }
}

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From source file:org.tramaci.onionmail.Stdio.java

License:Open Source License

public static byte[] AESEnc2m(byte[][] key, byte[][] iv, byte[] data) throws Exception {

    byte[][] blo = Stdio.DivBlock(data, 16, false);
    int cx = blo.length;
    int kc = key.length;
    for (int kx = 0; kx < kc; kx++) {
        CBCBlockCipher aes = new CBCBlockCipher(new AESEngine());
        CipherParameters ivAndKey = new ParametersWithIV(new KeyParameter(key[kx]), iv[kx]);
        aes.init(true, ivAndKey);/*from w ww. j  a v  a  2 s  .com*/
        for (int ax = 0; ax < cx; ax++)
            aes.processBlock(blo[ax], 0, blo[ax], 0);
    }

    data = Stdio.MulBlock(blo, 16);
    blo = null;
    return data;
}

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From source file:org.tramaci.onionmail.Stdio.java

License:Open Source License

public static byte[] AESDec2m(byte[][] key, byte[][] iv, byte[] data) throws Exception {

    byte[][] blo = Stdio.DivBlock(data, 16, false);
    int cx = blo.length;
    int kc = key.length - 1;
    for (int kx = kc; kx > -1; kx--) {
        CBCBlockCipher aes = new CBCBlockCipher(new AESEngine());
        CipherParameters ivAndKey = new ParametersWithIV(new KeyParameter(key[kx]), iv[kx]);
        aes.init(false, ivAndKey);//ww  w .ja va2 s  . c  om
        for (int ax = 0; ax < cx; ax++)
            aes.processBlock(blo[ax], 0, blo[ax], 0);
    }

    data = Stdio.MulBlock(blo, 16);
    blo = null;
    return data;
}

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From source file:org.tramaci.onionmail.Stdio.java

License:Open Source License

public static byte[] AESEnc2(byte[] key, byte[] iv, byte[] data) throws Exception {
    byte[][] blo = Stdio.DivBlock(data, 16, false);

    CBCBlockCipher aes = new CBCBlockCipher(new AESEngine());
    CipherParameters ivAndKey = new ParametersWithIV(new KeyParameter(key), iv);
    aes.init(true, ivAndKey);//from   ww w.j  ava  2  s. com

    int cx = blo.length;
    for (int ax = 0; ax < cx; ax++)
        aes.processBlock(blo[ax], 0, blo[ax], 0);
    data = Stdio.MulBlock(blo, 16);
    blo = null;
    return data;
}

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From source file:org.tramaci.onionmail.Stdio.java

License:Open Source License

public static byte[] AESDec2(byte[] key, byte[] iv, byte[] data) throws Exception {
    byte[][] blo = Stdio.DivBlock(data, 16, false);

    CBCBlockCipher aes = new CBCBlockCipher(new AESEngine());
    CipherParameters ivAndKey = new ParametersWithIV(new KeyParameter(key), iv);
    aes.init(false, ivAndKey);//from  w ww  .  ja  v a  2 s  . c o  m

    int cx = blo.length;
    for (int ax = 0; ax < cx; ax++)
        aes.processBlock(blo[ax], 0, blo[ax], 0);
    data = Stdio.MulBlock(blo, 16);
    blo = null;
    return data;
}

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From source file:org.tramaci.onionmail.Stdio.java

License:Open Source License

public static byte[] AES2Enc(byte[] key, byte[] iv, byte[] data) throws Exception {
    PaddedBufferedBlockCipher aes = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()));
    CipherParameters ivAndKey = new ParametersWithIV(new KeyParameter(key), iv);
    aes.init(true, ivAndKey);/*from w  ww .  j av  a  2  s.com*/
    return AES2cipher(aes, data);
}

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From source file:org.tramaci.onionmail.Stdio.java

License:Open Source License

public static byte[] AES2Dec(byte[] key, byte[] iv, byte[] data) throws Exception {
    try {//from w ww . j  av  a  2 s . co  m
        PaddedBufferedBlockCipher aes = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()));
        CipherParameters ivAndKey = new ParametersWithIV(new KeyParameter(key), iv);
        aes.init(false, ivAndKey);
        return AES2cipher(aes, data);
    } catch (Exception E) {
        throw new Exception("!Invalid KEY for data" + E.getMessage());
    }
}

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From source file:org.votingsystem.signature.util.Encryptor.java

License:Open Source License

public static String encryptAES(String messageToEncrypt, AESParams aesParams) throws NoSuchPaddingException,
        NoSuchAlgorithmException, InvalidAlgorithmParameterException, InvalidKeyException, BadPaddingException,
        IllegalBlockSizeException, UnsupportedEncodingException, InvalidCipherTextException {
    PaddedBufferedBlockCipher pbbc = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()));
    KeyParameter keyParam = new KeyParameter(aesParams.getKey().getEncoded());
    ParametersWithIV params = new ParametersWithIV(keyParam, aesParams.getIV().getIV());
    pbbc.init(true, params); //to decrypt put param to false
    byte[] input = messageToEncrypt.getBytes("UTF-8");
    byte[] output = new byte[pbbc.getOutputSize(input.length)];
    int bytesWrittenOut = pbbc.processBytes(input, 0, input.length, output, 0);
    pbbc.doFinal(output, bytesWrittenOut);
    return new String(org.bouncycastle.util.encoders.Base64.encode(output));
}

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From source file:org.votingsystem.signature.util.Encryptor.java

License:Open Source License

public static String decryptAES(String messageToDecrypt, AESParams aesParams) throws NoSuchPaddingException,
        NoSuchAlgorithmException, InvalidAlgorithmParameterException, InvalidKeyException, BadPaddingException,
        IllegalBlockSizeException, UnsupportedEncodingException, InvalidCipherTextException {
    PaddedBufferedBlockCipher pbbc = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()));
    KeyParameter keyParam = new KeyParameter(aesParams.getKey().getEncoded());
    CipherParameters params = new ParametersWithIV(keyParam, aesParams.getIV().getIV());
    pbbc.init(false, params); //to encrypt put param to true
    byte[] input = org.bouncycastle.util.encoders.Base64.decode(messageToDecrypt.getBytes("UTF-8"));
    byte[] output = new byte[pbbc.getOutputSize(input.length)];
    int bytesWrittenOut = pbbc.processBytes(input, 0, input.length, output, 0);
    pbbc.doFinal(output, bytesWrittenOut);
    int i = output.length - 1; //remove padding
    while (i >= 0 && output[i] == 0) {
        --i;/*  w w w .  j av a2s  .  c  o  m*/
    }
    return new String(Arrays.copyOf(output, i + 1), "UTF-8");
}

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From source file:org.xdi.oxauth.model.jwe.JweDecrypterImpl.java

License:MIT License

@Override
public String decryptCipherText(String encodedCipherText, byte[] contentMasterKey, byte[] initializationVector,
        byte[] authenticationTag, byte[] additionalAuthenticatedData) throws InvalidJweException {
    if (getBlockEncryptionAlgorithm() == null) {
        throw new InvalidJweException("The block encryption algorithm is null");
    }/*from ww w. j a  v a 2  s  .c o  m*/
    if (contentMasterKey == null) {
        throw new InvalidJweException("The content master key (CMK) is null");
    }
    if (initializationVector == null) {
        throw new InvalidJweException("The initialization vector is null");
    }
    if (authenticationTag == null) {
        throw new InvalidJweException("The authentication tag is null");
    }
    if (additionalAuthenticatedData == null) {
        throw new InvalidJweException("The additional authentication data is null");
    }

    try {
        if (getBlockEncryptionAlgorithm() == BlockEncryptionAlgorithm.A128GCM
                || getBlockEncryptionAlgorithm() == BlockEncryptionAlgorithm.A256GCM) {
            final int MAC_SIZE_BITS = 128;
            byte[] cipherText = Base64Util.base64urldecode(encodedCipherText);

            KeyParameter key = new KeyParameter(contentMasterKey);
            AEADParameters aeadParameters = new AEADParameters(key, MAC_SIZE_BITS, initializationVector,
                    additionalAuthenticatedData);
            SecretKeySpec sks = new SecretKeySpec(contentMasterKey, "AES");

            BlockCipher blockCipher = new AESEngine();
            CipherParameters params = new KeyParameter(sks.getEncoded());
            blockCipher.init(false, params);
            GCMBlockCipher aGCMBlockCipher = new GCMBlockCipher(blockCipher);
            aGCMBlockCipher.init(false, aeadParameters);
            byte[] input = new byte[cipherText.length + authenticationTag.length];
            System.arraycopy(cipherText, 0, input, 0, cipherText.length);
            System.arraycopy(authenticationTag, 0, input, cipherText.length, authenticationTag.length);
            int len = aGCMBlockCipher.getOutputSize(input.length);
            byte[] out = new byte[len];
            int outOff = aGCMBlockCipher.processBytes(input, 0, input.length, out, 0);
            aGCMBlockCipher.doFinal(out, outOff);

            String plaintext = new String(out, Charset.forName(Util.UTF8_STRING_ENCODING));

            return plaintext;
        } else if (getBlockEncryptionAlgorithm() == BlockEncryptionAlgorithm.A128CBC_PLUS_HS256
                || getBlockEncryptionAlgorithm() == BlockEncryptionAlgorithm.A256CBC_PLUS_HS512) {
            byte[] cipherText = Base64Util.base64urldecode(encodedCipherText);

            byte[] cek = KeyDerivationFunction.generateCek(contentMasterKey, getBlockEncryptionAlgorithm());
            Cipher cipher = Cipher.getInstance(getBlockEncryptionAlgorithm().getAlgorithm());
            IvParameterSpec ivParameter = new IvParameterSpec(initializationVector);
            cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(cek, "AES"), ivParameter);
            byte[] decodedPlainTextBytes = cipher.doFinal(cipherText);
            String decodedPlainText = new String(decodedPlainTextBytes,
                    Charset.forName(Util.UTF8_STRING_ENCODING));

            // Integrity check
            String securedInputValue = new String(additionalAuthenticatedData,
                    Charset.forName(Util.UTF8_STRING_ENCODING)) + "." + encodedCipherText;
            byte[] cik = KeyDerivationFunction.generateCik(contentMasterKey, getBlockEncryptionAlgorithm());
            SecretKey secretKey = new SecretKeySpec(cik,
                    getBlockEncryptionAlgorithm().getIntegrityValueAlgorithm());
            Mac mac = Mac.getInstance(getBlockEncryptionAlgorithm().getIntegrityValueAlgorithm());
            mac.init(secretKey);
            byte[] integrityValue = mac.doFinal(securedInputValue.getBytes(Util.UTF8_STRING_ENCODING));
            if (!Arrays.equals(integrityValue, authenticationTag)) {
                throw new InvalidJweException("The authentication tag is not valid");
            }

            return decodedPlainText;
        } else {
            throw new InvalidJweException("The block encryption algorithm is not supported");
        }
    } catch (InvalidCipherTextException e) {
        throw new InvalidJweException(e);
    } catch (NoSuchPaddingException e) {
        throw new InvalidJweException(e);
    } catch (BadPaddingException e) {
        throw new InvalidJweException(e);
    } catch (InvalidAlgorithmParameterException e) {
        throw new InvalidJweException(e);
    } catch (NoSuchAlgorithmException e) {
        throw new InvalidJweException(e);
    } catch (IllegalBlockSizeException e) {
        throw new InvalidJweException(e);
    } catch (UnsupportedEncodingException e) {
        throw new InvalidJweException(e);
    } catch (NoSuchProviderException e) {
        throw new InvalidJweException(e);
    } catch (InvalidKeyException e) {
        throw new InvalidJweException(e);
    } catch (InvalidParameterException e) {
        throw new InvalidJweException(e);
    }
}

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