Example usage for javax.crypto Cipher getBlockSize

Introduction

In this page you can find the example usage for javax.crypto Cipher getBlockSize.

Prototype

public final int getBlockSize() 

Source Link

Document

Returns the block size (in bytes).

Usage

From source file:acp.sdk.SecureUtil.java

/**
 * ???byte[]//w  w  w .  j  a v a 2  s .  c o m
 * 
 * @param publicKey
 * @param plainPin
 * @return
 * @throws Exception
 */
public static byte[] encryptedPin(PublicKey publicKey, byte[] plainPin) throws Exception {
    try {
        // y
        // Cipher cipher = Cipher.getInstance("DES",
        // new org.bouncycastle.jce.provider.BouncyCastleProvider());

        // 
        //         Cipher cipher = CliperInstance.getInstance();
        Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", "BC");
        cipher.init(Cipher.ENCRYPT_MODE, publicKey);
        int blockSize = cipher.getBlockSize();
        int outputSize = cipher.getOutputSize(plainPin.length);
        int leavedSize = plainPin.length % blockSize;
        int blocksSize = leavedSize != 0 ? plainPin.length / blockSize + 1 : plainPin.length / blockSize;
        byte[] raw = new byte[outputSize * blocksSize];
        int i = 0;
        while (plainPin.length - i * blockSize > 0) {
            if (plainPin.length - i * blockSize > blockSize) {
                cipher.doFinal(plainPin, i * blockSize, blockSize, raw, i * outputSize);
            } else {
                cipher.doFinal(plainPin, i * blockSize, plainPin.length - i * blockSize, raw, i * outputSize);
            }
            i++;
        }
        return raw;

        /*Cipher cipher = CliperInstance.getInstance();
        cipher.init(Cipher.ENCRYPT_MODE, publicKey);
        byte[] output = cipher.doFinal(plainPin);
        return output;*/

    } catch (Exception e) {
        throw new Exception(e.getMessage());
    }
}

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From source file:com.forsrc.utils.MyRsa2Utils.java

/**
 * Decrypt string.//from   w  ww.j av  a  2 s  . co  m
 *
 * @param privateKey the private key
 * @param cipherText the cipher text
 * @return the string
 * @throws RsaException the rsa exception
 */
public static String decrypt(PrivateKey privateKey, String cipherText) throws RsaException {
    Cipher cipher = null;
    try {
        cipher = Cipher.getInstance(RsaKey.ALGORITHM, new org.bouncycastle.jce.provider.BouncyCastleProvider());
    } catch (NoSuchAlgorithmException e) {
        throw new RsaException(e);
    } catch (NoSuchPaddingException e) {
        throw new RsaException(e);
    }
    try {
        cipher.init(Cipher.DECRYPT_MODE, privateKey);
    } catch (InvalidKeyException e) {
        throw new RsaException(e);
    }
    byte[] input = null;
    try {
        input = new Base64().decode(cipherText);
    } catch (Exception e) {
        throw new RsaException(e);
    }
    ByteArrayOutputStream baos = new ByteArrayOutputStream(1024);
    try {
        int blockSize = cipher.getBlockSize();
        blockSize = blockSize == 0 ? 117 : blockSize;
        int i = 0;
        int start = 0;

        do {
            start = i++ * blockSize;
            baos.write(cipher.doFinal(input, start, blockSize));
        } while (input.length - start - blockSize > 0);

    } catch (IllegalBlockSizeException e) {
        throw new RsaException(e);
    } catch (BadPaddingException e) {
        throw new RsaException(e);
    } catch (IOException e) {
        throw new RsaException(e);
    }
    return new String(baos.toByteArray());
}

---

From source file:com.puyuntech.flowerToHome.plugin.unionpayPayment.SecureUtil.java

/**
 * //from  ww  w . j  a va2 s  .c  o  m
 * @param privateKey
 * @param cryptPin
 * @return
 * @throws Exception
 */
public static byte[] decryptedPin(PrivateKey privateKey, byte[] cryptPin) throws Exception {

    try {
        /** ?PIN Block **/
        byte[] pinBlock = SecureUtil.base64Decode(cryptPin);
        // 
        Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding",
                new org.bouncycastle.jce.provider.BouncyCastleProvider());
        cipher.init(Cipher.DECRYPT_MODE, privateKey);
        int blockSize = cipher.getBlockSize();
        int outputSize = cipher.getOutputSize(pinBlock.length);
        int leavedSize = pinBlock.length % blockSize;
        int blocksSize = leavedSize != 0 ? pinBlock.length / blockSize + 1 : pinBlock.length / blockSize;
        byte[] pinData = new byte[outputSize * blocksSize];
        int i = 0;
        while (pinBlock.length - i * blockSize > 0) {
            if (pinBlock.length - i * blockSize > blockSize) {
                cipher.doFinal(pinBlock, i * blockSize, blockSize, pinData, i * outputSize);
            } else {
                cipher.doFinal(pinBlock, i * blockSize, pinBlock.length - i * blockSize, pinData,
                        i * outputSize);
            }
            i++;
        }
        return pinData;
    } catch (Exception e) {
    }
    return null;
}

---

From source file:cn.usually.common.pay.union.sdk.SecureUtil.java

/**
 * /*from w  ww  .  j  av a  2  s . c  o m*/
 * @param privateKey
 * @param cryptPin
 * @return
 * @throws Exception
 */
public static byte[] decryptedPin(PrivateKey privateKey, byte[] cryptPin) throws Exception {

    try {
        /** ?PIN Block **/
        byte[] pinBlock = SecureUtil.base64Decode(cryptPin);
        // 
        Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding",
                new org.bouncycastle.jce.provider.BouncyCastleProvider());
        cipher.init(Cipher.DECRYPT_MODE, privateKey);
        int blockSize = cipher.getBlockSize();
        int outputSize = cipher.getOutputSize(pinBlock.length);
        int leavedSize = pinBlock.length % blockSize;
        int blocksSize = leavedSize != 0 ? pinBlock.length / blockSize + 1 : pinBlock.length / blockSize;
        byte[] pinData = new byte[outputSize * blocksSize];
        int i = 0;
        while (pinBlock.length - i * blockSize > 0) {
            if (pinBlock.length - i * blockSize > blockSize) {
                cipher.doFinal(pinBlock, i * blockSize, blockSize, pinData, i * outputSize);
            } else {
                cipher.doFinal(pinBlock, i * blockSize, pinBlock.length - i * blockSize, pinData,
                        i * outputSize);
            }
            i++;
        }
        return pinData;
    } catch (Exception e) {
        LogUtil.writeErrorLog("", e);
    }
    return null;
}

---

From source file:unionpayUtil.sdk.SecureUtil.java

/**
 * /*from w  w  w .  ja  v  a 2 s . c  o m*/
 * @param privateKey
 * @param cryptPin
 * @return
 * @throws Exception
 */
public static byte[] decryptedPin(PrivateKey privateKey, byte[] cryptPin) throws Exception {

    try {
        /** ?PIN Block **/
        byte[] pinBlock = SecureUtil.base64Decode(cryptPin);
        // ?
        Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding",
                new org.bouncycastle.jce.provider.BouncyCastleProvider());
        cipher.init(Cipher.DECRYPT_MODE, privateKey);
        int blockSize = cipher.getBlockSize();
        int outputSize = cipher.getOutputSize(pinBlock.length);
        int leavedSize = pinBlock.length % blockSize;
        int blocksSize = leavedSize != 0 ? pinBlock.length / blockSize + 1 : pinBlock.length / blockSize;
        byte[] pinData = new byte[outputSize * blocksSize];
        int i = 0;
        while (pinBlock.length - i * blockSize > 0) {
            if (pinBlock.length - i * blockSize > blockSize) {
                cipher.doFinal(pinBlock, i * blockSize, blockSize, pinData, i * outputSize);
            } else {
                cipher.doFinal(pinBlock, i * blockSize, pinBlock.length - i * blockSize, pinData,
                        i * outputSize);
            }
            i++;
        }
        return pinData;
    } catch (Exception e) {
        LogUtil.writeErrorLog("", e);
    }
    return null;
}

---

From source file:com.wxsoft.framework.util.unionpay.SecureUtil.java

/**
 * /*w  w w. j  ava 2 s . co  m*/
 * @param privateKey
 * @param cryptPin
 * @return
 * @throws Exception
 */
public static byte[] decryptedPin(PrivateKey privateKey, byte[] cryptPin) throws Exception {

    try {
        /** ?PIN Block **/
        byte[] pinBlock = SecureUtil.base64Decode(cryptPin);
        // 
        Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding",
                new org.bouncycastle.jce.provider.BouncyCastleProvider());
        cipher.init(Cipher.DECRYPT_MODE, privateKey);
        int blockSize = cipher.getBlockSize();
        int outputSize = cipher.getOutputSize(pinBlock.length);
        int leavedSize = pinBlock.length % blockSize;
        int blocksSize = leavedSize != 0 ? pinBlock.length / blockSize + 1 : pinBlock.length / blockSize;
        byte[] pinData = new byte[outputSize * blocksSize];
        int i = 0;
        while (pinBlock.length - i * blockSize > 0) {
            if (pinBlock.length - i * blockSize > blockSize) {
                cipher.doFinal(pinBlock, i * blockSize, blockSize, pinData, i * outputSize);
            } else {
                cipher.doFinal(pinBlock, i * blockSize, pinBlock.length - i * blockSize, pinData,
                        i * outputSize);
            }
            i++;
        }
        return pinData;
    } catch (Exception e) {
        logger.error("", e);
    }
    return null;
}

---

From source file:com.rr.familyPlanning.ui.security.encryptObject.java

/**
 * Encrypts and encodes the Object and IV for url inclusion
 *
 * @param input//w  w  w. jav a 2s  .  c  om
 * @return
 * @throws Exception
 */
public String[] encryptObject(Object obj) throws Exception {
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    ObjectOutput out = new ObjectOutputStream(stream);
    try {
        // Serialize the object
        out.writeObject(obj);
        byte[] serialized = stream.toByteArray();
        // Setup the cipher and Init Vector
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        byte[] iv = new byte[cipher.getBlockSize()];
        new SecureRandom().nextBytes(iv);
        IvParameterSpec ivSpec = new IvParameterSpec(iv);
        // Hash the key with SHA-256 and trim the output to 128-bit for the key
        MessageDigest digest = MessageDigest.getInstance("SHA-256");
        digest.update(keyString.getBytes());
        byte[] key = new byte[16];
        System.arraycopy(digest.digest(), 0, key, 0, key.length);
        SecretKeySpec keySpec = new SecretKeySpec(key, "AES");
        // encrypt
        cipher.init(Cipher.ENCRYPT_MODE, keySpec, ivSpec);
        // Encrypt & Encode the input
        byte[] encrypted = cipher.doFinal(serialized);
        byte[] base64Encoded = Base64.encodeBase64(encrypted);
        String base64String = new String(base64Encoded);
        String urlEncodedData = URLEncoder.encode(base64String, "UTF-8");
        // Encode the Init Vector
        byte[] base64IV = Base64.encodeBase64(iv);
        String base64IVString = new String(base64IV);
        String urlEncodedIV = URLEncoder.encode(base64IVString, "UTF-8");

        return new String[] { urlEncodedData, urlEncodedIV };
    } finally {
        stream.close();
        out.close();
    }
}

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From source file:CipherSocket.java

public OutputStream getOutputStream() throws IOException {
    OutputStream os = delegate == null ? super.getOutputStream() : delegate.getOutputStream();
    Cipher cipher = null;
    try {//from   ww  w  . j a v a 2 s . com
        cipher = Cipher.getInstance(algorithm);
        int size = cipher.getBlockSize();
        byte[] tmp = new byte[size];
        Arrays.fill(tmp, (byte) 15);
        IvParameterSpec iv = new IvParameterSpec(tmp);
        cipher.init(Cipher.ENCRYPT_MODE, key, iv);
    } catch (Exception e) {
        throw new IOException("Failed to init cipher: " + e.getMessage());
    }
    CipherOutputStream cos = new CipherOutputStream(os, cipher);
    return cos;
}

---

From source file:CipherSocket.java

public InputStream getInputStream() throws IOException {
    InputStream is = delegate == null ? super.getInputStream() : delegate.getInputStream();
    Cipher cipher = null;
    try {//from   ww  w.j av  a2s  .c  o m
        cipher = Cipher.getInstance(algorithm);
        int size = cipher.getBlockSize();
        byte[] tmp = new byte[size];
        Arrays.fill(tmp, (byte) 15);
        IvParameterSpec iv = new IvParameterSpec(tmp);
        cipher.init(Cipher.DECRYPT_MODE, key, iv);
    } catch (Exception e) {
        e.printStackTrace();
        throw new IOException("Failed to init cipher: " + e.getMessage());
    }
    CipherInputStream cis = new CipherInputStream(is, cipher);
    return cis;
}

---

From source file:com.muk.services.commerce.CryptoServiceImpl.java

@PostConstruct
public void postConstruct() {
    try {/* ww w .ja v  a  2 s.  c o  m*/
        final KeyGenerator kgen = KeyGenerator.getInstance("AES");
        kgen.init(128);
        temporaryKey = new SecretKeySpec(kgen.generateKey().getEncoded(), "AES");

        final Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        final byte[] iv = new byte[cipher.getBlockSize()];
        new SecureRandom().nextBytes(iv);
        ivSpec = new IvParameterSpec(iv);
    } catch (final NoSuchAlgorithmException ex) {
        LOG.error("Failed to initalize encryption key", ex);
    } catch (final NoSuchPaddingException padEx) {
        LOG.error("Failed to get cipher.", padEx);
    }
}

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