Example usage for javax.crypto Cipher init

Introduction

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

Prototype

public final void init(int opmode, Certificate certificate) throws InvalidKeyException 

Source Link

Document

Initializes this cipher with the public key from the given certificate.

Usage

From source file:uploadProcess.java

public static boolean encrypt(File inputFolder, File outputFolder, String fileName, String patientID) {
    try {//from www. j  a v a  2s.c o  m

        String ukey = GetKey.getPatientKey(patientID);
        File filePath = new File(inputFolder.getAbsolutePath() + File.separator + fileName);
        FileInputStream fis = new FileInputStream(filePath);
        File outputFile = new File(outputFolder.getAbsolutePath() + File.separator + fileName);
        FileOutputStream fos = new FileOutputStream(outputFile);
        byte[] k = ukey.getBytes();
        SecretKeySpec key = new SecretKeySpec(k, "AES");
        //            System.out.println(key);
        Cipher enc = Cipher.getInstance("AES");
        enc.init(Cipher.ENCRYPT_MODE, key);
        CipherOutputStream cos = new CipherOutputStream(fos, enc);
        byte[] buf = new byte[1024];
        int read;
        while ((read = fis.read(buf)) != -1) {
            cos.write(buf, 0, read);
        }
        fis.close();
        fos.flush();
        cos.close();

        //Upload File to cloud
        DropboxUpload upload = new DropboxUpload();
        upload.uploadFile(outputFolder, fileName, StoragePath.getDropboxDir() + patientID);
        DeleteDirectory.delete(outputFolder);
        return true;
    } catch (Exception e) {
        System.out.println("Error: " + e);
    }
    return false;
}

---

From source file:uploadProcess.java

public static boolean decrypt(File inputFolder, String fileName, String patientID) {
    try {//from   w ww.j a  v  a2  s  .  c  om
        //Download File from Cloud..
        DropboxUpload download = new DropboxUpload();
        download.downloadFile(fileName, StoragePath.getDropboxDir() + patientID, inputFolder);

        String ukey = GetKey.getPatientKey(patientID);
        File inputFile = new File(inputFolder.getAbsolutePath() + File.separator + fileName);
        FileInputStream fis = new FileInputStream(inputFile);
        File outputFolder = new File(inputFolder.getAbsolutePath() + File.separator + "temp");
        if (!outputFolder.exists()) {
            outputFolder.mkdir();
        }
        FileOutputStream fos = new FileOutputStream(outputFolder.getAbsolutePath() + File.separator + fileName);
        byte[] k = ukey.getBytes();
        SecretKeySpec key = new SecretKeySpec(k, "AES");
        Cipher enc = Cipher.getInstance("AES");
        enc.init(Cipher.DECRYPT_MODE, key);
        CipherOutputStream cos = new CipherOutputStream(fos, enc);
        byte[] buf = new byte[1024];
        int read;
        while ((read = fis.read(buf)) != -1) {
            cos.write(buf, 0, read);
        }
        fis.close();
        fos.flush();
        cos.close();
        return true;
    } catch (Exception e) {
        System.out.println("Error: " + e);
    }
    return false;
}

---

From source file:Logic.security.java

public static String symmetricEncrypt(String text, String secretKey) {
    byte[] raw;/*from w ww.  j  a v a2  s . c o  m*/
    String encryptedString;
    SecretKeySpec skeySpec;
    byte[] encryptText = text.getBytes();
    Cipher cipher;
    try {
        raw = Base64.decodeBase64(secretKey);
        skeySpec = new SecretKeySpec(raw, "AES");
        cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
        encryptedString = Base64.encodeBase64String(cipher.doFinal(encryptText));
    } catch (Exception e) {
        e.printStackTrace();
        return "Error";
    }
    return encryptedString;
}

---

From source file:com.hhi.bigdata.platform.push.client.RegisterUtil.java

/**
 * <pre>/*from w w  w  .  ja  va 2s .  c o m*/
 * private key ? app name? ? ? return
 * </pre>
 * @return
 * @throws Exception
 */
private static String getAppNameEnc(PrivateKey privKey, String appName) throws Exception {
    Cipher cipher = Cipher.getInstance("RSA");
    cipher.init(Cipher.ENCRYPT_MODE, privKey);

    return Base64.encodeBase64String(cipher.doFinal(appName.getBytes()));
}

---

From source file:fr.ortolang.diffusion.security.authentication.TicketHelper.java

public static Ticket decodeTicket(String ticket) {
    byte[] encryptedBytes = Base64.decodeBase64(ticket.getBytes());
    try {/*  w w w . j a v a  2s.c  o  m*/
        Cipher cipher = Cipher.getInstance(ALGORITHM_MODE_PADDING);
        cipher.init(Cipher.DECRYPT_MODE, key);
        byte[] decryptedBytes = cipher.doFinal(encryptedBytes);
        // Extract digest from decryptedBytes (MD5 length is 16 bytes)
        byte[] digest = Arrays.copyOfRange(decryptedBytes, decryptedBytes.length - 16, decryptedBytes.length);
        byte[] serializedMap = Arrays.copyOfRange(decryptedBytes, 0, decryptedBytes.length - 16);
        MessageDigest md = MessageDigest.getInstance(MESSAGE_DIGEST_ALGORITHM);
        if (!Arrays.equals(digest, md.digest(serializedMap))) {
            throw new DigestException();
        }
        ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(serializedMap));
        return (Ticket) ois.readObject();
    } catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException | BadPaddingException
            | IllegalBlockSizeException | IOException | ClassNotFoundException | DigestException e) {
        LOGGER.log(Level.SEVERE, "Error when decoding ticket: " + e.getMessage());
    }
    return null;
}

---

From source file:Main.java

/**
 * More flexible AES encrypt that doesn't encode
 * @param key AES key typically 128, 192 or 256 bit
 * @param iv Initiation Vector//from ww w . ja v a  2s  . c  o  m
 * @param message in bytes (assumed it's already been decoded)
 * @return Encrypted cipher text (not encoded)
 * @throws GeneralSecurityException if something goes wrong during encryption
 */
public static byte[] encrypt(final SecretKeySpec key, final byte[] iv, final byte[] message)
        throws GeneralSecurityException {
    final Cipher cipher = Cipher.getInstance(AES_MODE);
    //IvParameterSpec ivSpec = new IvParameterSpec(iv);
    cipher.init(Cipher.ENCRYPT_MODE, key);
    byte[] cipherText = cipher.doFinal(message);

    log("cipherText", cipherText);

    return cipherText;
}

---

From source file:net.fender.crypto.CryptoUtil.java

/**
 * NB: Ciphers are not thread safe. Don't reuse the instance returned by
 * this method in multiple threads./*from w  ww .  ja va 2s .  co  m*/
 * 
 * @param keyName
 * @param mode
 * @return
 * @throws GeneralSecurityException
 */
public static Cipher getSystemPropertyCipher(String keyName, int mode) throws GeneralSecurityException {
    Key key = getSystemPropertyKey(keyName);
    Cipher cipher = Cipher.getInstance(key.getAlgorithm());
    cipher.init(mode, key);
    return cipher;
}

---

From source file:uploadProcess.java

public static boolean encrypt(String path, FileItemStream item, String patientID) {
    try {//from  ww  w.j a v  a 2s . com
        File mainFolder = new File(path + File.separator + "Encrypt");
        if (!mainFolder.exists()) {
            mainFolder.mkdir();
        }
        File patientFolder = new File(mainFolder + File.separator + patientID);
        if (!patientFolder.exists()) {
            patientFolder.mkdir();
        }
        String ukey = GetKey.getPatientKey(patientID);
        InputStream fis = item.openStream();

        FileOutputStream fos = new FileOutputStream(
                patientFolder.getAbsolutePath() + File.separator + item.getName());
        byte[] k = ukey.getBytes();
        SecretKeySpec key = new SecretKeySpec(k, "AES");
        System.out.println(key);
        Cipher enc = Cipher.getInstance("AES");
        enc.init(Cipher.ENCRYPT_MODE, key);
        CipherOutputStream cos = new CipherOutputStream(fos, enc);
        byte[] buf = new byte[1024];
        int read;
        while ((read = fis.read(buf)) != -1) {
            cos.write(buf, 0, read);
        }
        fis.close();
        fos.flush();
        cos.close();

        //Upload File to cloud
        DropboxUpload upload = new DropboxUpload();
        upload.uploadFile(patientFolder, item.getName(), StoragePath.getDropboxDir() + patientID);
        DeleteDirectory.delete(patientFolder);

        return true;
    } catch (Exception e) {
        System.out.println("Error: " + e);
    }
    return false;
}

---

From source file:net.fender.crypto.CryptoUtil.java

/**
 * @param keyName/*from  w  ww .  j  av  a2  s.  c  om*/
 * @param plaintext
 * @return
 * @throws GeneralSecurityException
 */
public static String encryptUsingSystemPropertyKey(String keyName, String plaintext)
        throws GeneralSecurityException {
    Key key = getSystemPropertyKey(keyName);
    Cipher cipher = Cipher.getInstance(key.getAlgorithm());
    cipher.init(Cipher.ENCRYPT_MODE, key);
    byte[] encryptedByes = cipher.doFinal(plaintext.getBytes());
    String encrypted = new String(Base64.encodeBase64(encryptedByes));
    return encrypted;
}

---

From source file:net.fender.crypto.CryptoUtil.java

/**
 * @param keyName//w  ww  .  j a v  a2 s  .com
 * @param base64Encoded
 * @return
 * @throws GeneralSecurityException
 */
public static String decryptUsingSystemPropertyKey(String keyName, String base64Encoded)
        throws GeneralSecurityException {
    byte[] encryptedBytes = Base64.decodeBase64(base64Encoded.getBytes());
    Key key = getSystemPropertyKey(keyName);
    Cipher cipher = Cipher.getInstance(key.getAlgorithm());
    cipher.init(Cipher.DECRYPT_MODE, key);
    byte[] decryptedBytes = cipher.doFinal(encryptedBytes);
    String decrypted = new String(decryptedBytes);
    return decrypted;
}

---

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