Example usage for java.security DigestException DigestException

Introduction

In this page you can find the example usage for java.security DigestException DigestException.

Prototype

public DigestException() 

Source Link

Document

Constructs a DigestException with no detail message.

Usage

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

public static Ticket decodeTicket(String ticket) {
    byte[] encryptedBytes = Base64.decodeBase64(ticket.getBytes());
    try {/*from  w  ww  .  j  ava 2  s  .c  om*/
        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;
}

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