Example usage for javax.crypto CipherInputStream read

Introduction

In this page you can find the example usage for javax.crypto CipherInputStream read.

Prototype

public int read() throws IOException 

Source Link

Document

Reads the next byte of data from this input stream.

Usage

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    byte[] input = "www.java2s.com".getBytes();
    byte[] keyBytes = new byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c,
            0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17 };
    byte[] ivBytes = new byte[] { 0x00, 0x01, 0x02, 0x03, 0x00, 0x01, 0x02, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x01 };/*  w w  w . j a  v a2s  .  c  om*/

    SecretKeySpec key = new SecretKeySpec(keyBytes, "AES");
    IvParameterSpec ivSpec = new IvParameterSpec(ivBytes);
    Cipher cipher = Cipher.getInstance("AES/CTR/NoPadding", "BC");
    System.out.println("input : " + new String(input));

    // encryption pass
    cipher.init(Cipher.ENCRYPT_MODE, key, ivSpec);
    ByteArrayInputStream bIn = new ByteArrayInputStream(input);
    CipherInputStream cIn = new CipherInputStream(bIn, cipher);
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();

    int ch;
    while ((ch = cIn.read()) >= 0) {
        bOut.write(ch);
    }

    byte[] cipherText = bOut.toByteArray();

    System.out.println("cipher: " + new String(cipherText));

    // decryption pass
    cipher.init(Cipher.DECRYPT_MODE, key, ivSpec);
    bOut = new ByteArrayOutputStream();
    CipherOutputStream cOut = new CipherOutputStream(bOut, cipher);
    cOut.write(cipherText);
    cOut.close();
    System.out.println("plain : " + new String(bOut.toByteArray()));
}

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From source file:MainClass.java

public static void read(byte[] bytes, InputStream in) throws Exception {
    CipherInputStream cis = new CipherInputStream(in, m_decrypter);
    int pos = 0, intValue;

    while ((intValue = cis.read()) != -1) {
        bytes[pos] = (byte) intValue;
        pos++;//ww  w  .  ja va2 s . com
    }
}

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From source file:MainClass.java

public static void blowfishEncrypt(String f1, String f2) throws Exception {
    SecretKey key = null;//from   ww w. ja  v  a  2  s. c  o m

    ObjectInputStream keyFile = new ObjectInputStream(new FileInputStream("BlowfishKey.ser"));
    key = (SecretKey) keyFile.readObject();
    keyFile.close();
    Cipher cipher = Cipher.getInstance("Blowfish/ECB/PKCS5Padding");
    cipher.init(Cipher.DECRYPT_MODE, key);
    CipherInputStream in = new CipherInputStream(new BufferedInputStream(new FileInputStream(f1)), cipher);
    BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(f2));
    int i;
    do {
        i = in.read();
        if (i != -1)
            out.write(i);
    } while (i > 0);
    in.close();
    out.close();
}

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From source file:MainClass.java

public static void desEncrypt(String f1, String f2) throws Exception {
    SecretKey key = null;//from w  w  w . j  a va 2s  . c  om

    ObjectInputStream keyFile = new ObjectInputStream(new FileInputStream("DESKey.ser"));
    key = (SecretKey) keyFile.readObject();
    keyFile.close();
    Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
    cipher.init(Cipher.DECRYPT_MODE, key);
    CipherInputStream in = new CipherInputStream(new BufferedInputStream(new FileInputStream(f1)), cipher);
    BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(f2));
    int i;
    do {
        i = in.read();
        if (i != -1)
            out.write(i);
    } while (i > 0);
    in.close();
    out.close();
}

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From source file:Main.java

@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
private static String decryptStringImpl(Context context, final String encryptedText) {
    String plainText = null;/*w  w  w  .jav a  2s  .c  om*/
    try {
        final KeyStore keyStore = getKeyStore(context);

        PrivateKey privateKey = (PrivateKey) keyStore.getKey(KEY_ALIAS, null);

        String algorithm = ALGORITHM_OLD;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            algorithm = ALGORITHM;
        }
        Cipher cipher = Cipher.getInstance(algorithm);
        cipher.init(Cipher.DECRYPT_MODE, privateKey);

        CipherInputStream cipherInputStream = new CipherInputStream(
                new ByteArrayInputStream(Base64.decode(encryptedText, Base64.DEFAULT)), cipher);

        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        int b;
        while ((b = cipherInputStream.read()) != -1) {
            outputStream.write(b);
        }
        outputStream.close();
        plainText = outputStream.toString("UTF-8");
    } catch (Exception e) {
        e.printStackTrace();
    }
    return plainText;
}

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From source file:de.schildbach.wallet.util.FingerprintHelper.java

private String decipher(Cipher cipher) throws IOException {
    String retVal = null;/*from   w  ww . j a  v a 2 s. c  o  m*/
    String savedEncryptedPassword = getSavedEncryptedPassword();
    if (savedEncryptedPassword != null) {
        byte[] decodedPassword = decodeBytes(savedEncryptedPassword);
        CipherInputStream cipherInputStream = new CipherInputStream(new ByteArrayInputStream(decodedPassword),
                cipher);

        ArrayList<Byte> values = new ArrayList<>();
        int nextByte;
        while ((nextByte = cipherInputStream.read()) != -1) {
            values.add((byte) nextByte);
        }
        cipherInputStream.close();

        byte[] bytes = new byte[values.size()];
        for (int i = 0; i < values.size(); i++) {
            bytes[i] = values.get(i).byteValue();
        }

        retVal = new String(bytes, Charset.defaultCharset());
    }
    return retVal;
}

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From source file:nl.afas.cordova.plugin.secureLocalStorage.SecureLocalStorage.java

@SuppressWarnings("unchecked")
private HashMap<String, String> readAndDecryptStorage(KeyStore keyStore) throws SecureLocalStorageException {

    try {/* ww  w.j a  v  a  2  s  .  c om*/
        // obtain encrypted key
        SecretKey key = getSecretKey(keyStore);

        FileInputStream fis = _cordova.getActivity().openFileInput(SECURELOCALSTORAGEFILE);
        ArrayList<Byte> values = new ArrayList<Byte>();
        try {

            Cipher output = Cipher.getInstance("DES");
            output.init(Cipher.DECRYPT_MODE, key);

            CipherInputStream cipherInputStream = new CipherInputStream(fis, output);
            try {

                int nextByte;
                while ((nextByte = cipherInputStream.read()) != -1) {
                    values.add((byte) nextByte);
                }
            } finally {
                cipherInputStream.close();
            }
        } finally {
            fis.close();
        }

        byte[] bytes = new byte[values.size()];
        for (int i = 0; i < bytes.length; i++) {
            bytes[i] = values.get(i);
        }

        HashMap<String, String> hashMap;
        ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(bytes));
        try {
            hashMap = (HashMap<String, String>) ois.readObject();
        } finally {
            ois.close();
        }
        return hashMap;
    } catch (Exception e) {
        Log.e("SecureStorage", "Write", e);
        throw new SecureLocalStorageException("Error decrypting storage", e);
    }
}

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From source file:com.microsoft.azure.storage.blob.CloudBlobClientEncryptionTests.java

@Test
public void testBlockBlobValidateEncryption() throws InvalidKeyException, NoSuchAlgorithmException,
        NoSuchPaddingException, StorageException, IOException, InvalidAlgorithmParameterException,
        URISyntaxException, InterruptedException, ExecutionException {
    int size = 5 * 1024 * 1024;
    byte[] buffer = TestHelper.getRandomBuffer(size);

    CloudBlockBlob blob = container.getBlockBlobReference("blob1");

    // Create the Key to be used for wrapping.
    SymmetricKey aesKey = TestHelper.getSymmetricKey();

    // Create the encryption policy to be used for upload.
    BlobEncryptionPolicy uploadPolicy = new BlobEncryptionPolicy(aesKey, null);

    // Set the encryption policy on the request options.
    BlobRequestOptions uploadOptions = new BlobRequestOptions();
    uploadOptions.setEncryptionPolicy(uploadPolicy);

    // Upload the encrypted contents to the blob.
    ByteArrayInputStream stream = new ByteArrayInputStream(buffer);
    blob.upload(stream, size, null, uploadOptions, null);

    // Encrypt locally.
    String metadata = blob.getMetadata().get(Constants.EncryptionConstants.BLOB_ENCRYPTION_DATA);
    BlobEncryptionData encryptionData = BlobEncryptionData.deserialize(metadata);

    Cipher myAes = Cipher.getInstance("AES/CBC/PKCS5Padding");
    IvParameterSpec ivParameterSpec = new IvParameterSpec(encryptionData.getContentEncryptionIV());

    byte[] contentEncryptionKey = aesKey.unwrapKeyAsync(encryptionData.getWrappedContentKey().getEncryptedKey(),
            encryptionData.getWrappedContentKey().getAlgorithm()).get();
    SecretKey keySpec = new SecretKeySpec(contentEncryptionKey, 0, contentEncryptionKey.length, "AES");

    myAes.init(Cipher.ENCRYPT_MODE, keySpec, ivParameterSpec);

    CipherInputStream encryptedStream = new CipherInputStream(new ByteArrayInputStream(buffer), myAes);

    // Download the encrypted contents from the blob.
    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
    blob.download(outputStream);//from   ww  w  .  j  a  v a 2 s. c  om

    ByteArrayInputStream inputStream = new ByteArrayInputStream(outputStream.toByteArray());
    for (int i = 0; i < outputStream.size(); i++) {
        assertEquals(encryptedStream.read(), inputStream.read());
    }

    encryptedStream.close();
}

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