Example usage for javax.crypto.spec IvParameterSpec IvParameterSpec

Introduction

In this page you can find the example usage for javax.crypto.spec IvParameterSpec IvParameterSpec.

Prototype

public IvParameterSpec(byte[] iv) 

Source Link

Document

Creates an IvParameterSpec object using the bytes in iv as the IV.

Usage

From source file:com.invariantproperties.sandbox.springentitylistener.service.EncryptorBean.java

/**
 * Decrypt string/*from   w  ww.  j  a  v  a2  s .  c om*/
 */
public String decryptString(String ciphertext, String salt) {
    String plaintext = null;

    if (ciphertext != null) {
        try {
            // Encryptor encryptor = JavaEncryptor.getInstance();
            // CipherText ct =
            // CipherText.fromPortableSerializedBytes(Base64.decode(ciphertext));
            // plaintext = encryptor.decrypt(key, ct).toString();
            IvParameterSpec iv = new IvParameterSpec(Base64.decode(salt));
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
            cipher.init(Cipher.DECRYPT_MODE, key, iv);

            plaintext = new String(cipher.doFinal(Base64.decode(ciphertext)));
        } catch (NoSuchAlgorithmException e) {
            // handle exception. Perhaps set value to null?
            System.out.println("decryption exception: " + e.getMessage());
        } catch (NoSuchPaddingException e) {
            // handle exception. Perhaps set value to null?
            System.out.println("decryption exception: " + e.getMessage());
        } catch (InvalidKeyException e) {
            // handle exception. Perhaps set value to null?
            System.out.println("decryption exception: " + e.getMessage());
        } catch (BadPaddingException e) {
            // handle exception. Perhaps set value to null?
            System.out.println("decryption exception: " + e.getMessage());
        } catch (IllegalBlockSizeException e) {
            // handle exception. Perhaps set value to null?
            System.out.println("decryption exception: " + e.getMessage());
        } catch (Throwable e) {
            e.printStackTrace(System.out);
        }
    }

    return plaintext;
}

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From source file:com.diona.fileReader.CipherUtil.java

/**
 * Encrypts the given string (plaintext).
 * /*from w w  w .  ja  v  a2 s.  c  om*/
 * @param bytes
 *          byte array to be encrypted.
 * @param context
 *          context to fetch preferences.
 * @return encrypted byte array.
 */
@SuppressLint("TrulyRandom")
public byte[] encryptBytes(final byte[] bytes, final Context context) {

    // Transaction.checkLongRunningProcessing("encryptBytes");

    if (!ENCRYPTION_ENABLED) {
        return bytes;
    }

    byte[] encryptedTextBytes = null;
    try {
        // Derive the secret key
        final SecretKeySpec secretKey = getSecretKey(context);

        // encrypt the message
        final Cipher cipher = Cipher.getInstance(ENCRYPTION_ALGORITHM);
        final IvParameterSpec ivspec = new IvParameterSpec(getIV(context));
        cipher.init(Cipher.ENCRYPT_MODE, secretKey, ivspec);
        encryptedTextBytes = cipher.doFinal(bytes);
    } catch (final Exception e) {
        Log.e(TAG, "" + e);
    }
    return encryptedTextBytes;
}

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From source file:press.gfw.chat.Encrypt.java

/**
 * //from   ww  w .j a va2 s .c  o  m
 *
 * @param key
 *            SecretKey
 * @param cipher_data
 *            ?
 * @param IV
 *            IV
 *
 * @return ?
 *
 */
public byte[] decrypt(SecretKey key, byte[] cipher_data, byte[] IV) {

    if (key == null || cipher_data == null || cipher_data.length == 0 || IV == null || IV.length == 0) {

        return null;

    }

    IvParameterSpec IVSpec = new IvParameterSpec(IV);

    try {

        cipher.init(Cipher.DECRYPT_MODE, key, IVSpec);

    } catch (InvalidKeyException | InvalidAlgorithmParameterException ex) {

        log("?Cipher");

        ex.printStackTrace();

        return null;

    }

    try {

        return cipher.doFinal(cipher_data);

    } catch (IllegalBlockSizeException | BadPaddingException ex) {

        log("?");

        ex.printStackTrace();

        return null;

    }

}

---

From source file:org.craftercms.commons.crypto.SimpleCipher.java

public byte[] decrypt(byte[] encrypted) throws CryptoException {
    if (key == null) {
        throw new CryptoException(ERROR_KEY_KEY_NOT_SET);
    }/*w ww  .jav a  2  s.c  o  m*/
    if (iv == null) {
        throw new CryptoException(ERROR_KEY_IV_NOT_SET);
    }
    if (cipher == null) {
        cipher = createDefaultCipher();
    }

    try {
        cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(iv));

        return cipher.doFinal(encrypted);
    } catch (GeneralSecurityException e) {
        throw new CryptoException(ERROR_KEY_DEC_ERROR, e);
    } finally {
        logger.debug(LOG_KEY_DEC_SUCCESSFUL);
    }
}

---

From source file:com.jaspersoft.jasperserver.api.metadata.common.service.impl.Cipherer.java

/**
* Initializes the encoder and decoder. // ww w  .j a  v a  2  s  .co m
* Note: The vaues of CIPHER_TRANSFORMATION, KEY_BYTES, KEY_ALGORITHM should be set before calling this method,
*       otherwise it will use the default values.
*/
public void init() {
    try {
        /*
                 byte[] nonce = new byte[16];
                 NONCE_GEN.nextBytes(nonce);
                 AlgorithmParameterSpec paramSpec = new IvParameterSpec(nonce);
        */
        AlgorithmParameterSpec paramSpec = cipherTransformation.toUpperCase().startsWith("AES")
                ? new IvParameterSpec(INIT_VECTOR_16)
                : new IvParameterSpec(INIT_VECTOR_8);

        E_CIPHER = Cipher.getInstance(cipherTransformation);
        D_CIPHER = Cipher.getInstance(cipherTransformation);

        SecretKeySpec spec = new SecretKeySpec(keyBytes, keyAlgorithm);

        // CBC requires an initialization vector
        E_CIPHER.init(Cipher.ENCRYPT_MODE, spec, paramSpec);
        D_CIPHER.init(Cipher.DECRYPT_MODE, spec, paramSpec);
    } catch (Exception e) {
        log.error("Cipher init failed", e);
        throw new RuntimeException(e);
    }
}

---

From source file:org.cogroo.addon.util.SecurityUtil.java

private byte[] decrypt(byte[] secretKey, byte[] encryptedText) {
    byte[] text = null;
    try {//from   w w w  .  j a  v a 2s. com
        Cipher aescf = Cipher.getInstance("AES/CBC/PKCS5Padding");
        IvParameterSpec ivspec = new IvParameterSpec(new byte[16]);
        aescf.init(Cipher.DECRYPT_MODE, new SecretKeySpec(secretKey, "AES"), ivspec);
        text = aescf.doFinal(encryptedText);

    } catch (Exception e) {
        LOG.log(Level.SEVERE, "Should not happen", e);
    }

    return text;
}

---

From source file:com.miyue.util.Cryptos.java

/**
 * AES?, ?.// ww  w.  j  a  v  a 2  s. c o  m
 * 
 * @param input 
 * @param key ?AES?
 * @param iv ???
 * @param mode Cipher.ENCRYPT_MODE  Cipher.DECRYPT_MODE
 */
private static byte[] aes(byte[] input, byte[] key, byte[] iv, int mode) {
    try {
        SecretKey secretKey = new SecretKeySpec(key, AES);
        IvParameterSpec ivSpec = new IvParameterSpec(iv);
        Cipher cipher = Cipher.getInstance(AES_CBC);
        cipher.init(mode, secretKey, ivSpec);
        return cipher.doFinal(input);
    } catch (GeneralSecurityException e) {
        throw Exceptions.unchecked(e);
    }
}

---

From source file:net.thewaffleshop.nimbus.api.EncryptionAPI.java

/**
 * Decrypt/*from w  w  w  .  ja  v  a2 s .com*/
 *
 * @param secretKey
 * @param iv
 * @param secret
 * @return
 */
public byte[] decrypt(SecretKey secretKey, byte[] iv, byte[] secret) {
    try {
        IvParameterSpec ivSpec = new IvParameterSpec(iv);
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, secretKey, ivSpec);
        byte[] ret = cipher.doFinal(secret);
        return ret;
    } catch (GeneralSecurityException e) {
        throw new RuntimeException(e);
    }
}

---

From source file:org.jumpmind.security.SecurityService.java

protected void initializeCipher(Cipher cipher, int mode) throws Exception {
    AlgorithmParameterSpec paramSpec = Cipher.getMaxAllowedParameterSpec(cipher.getAlgorithm());

    if (paramSpec instanceof PBEParameterSpec
            || (paramSpec == null && cipher.getAlgorithm().startsWith("PBE"))) {
        paramSpec = new PBEParameterSpec(SecurityConstants.SALT, SecurityConstants.ITERATION_COUNT);
        cipher.init(mode, secretKey, paramSpec);
    } else if (paramSpec instanceof IvParameterSpec) {
        paramSpec = new IvParameterSpec(SecurityConstants.SALT);
        cipher.init(mode, secretKey, paramSpec);
    } else {/*from  www .  j ava2 s .c o  m*/
        cipher.init(mode, secretKey, (AlgorithmParameterSpec) null);
    }
}

---

From source file:bobs.is.compress.sevenzip.AES256SHA256Decoder.java

@Override
InputStream decode(final String archiveName, final InputStream in, final long uncompressedLength,
        final Coder coder, final byte[] passwordBytes) throws IOException {
    return new InputStream() {
        private boolean isInitialized = false;
        private CipherInputStream cipherInputStream = null;

        private CipherInputStream init() throws IOException {
            if (isInitialized) {
                return cipherInputStream;
            }/*from   ww w .  j  a v  a2  s .  c o m*/
            final int byte0 = 0xff & coder.properties[0];
            final int numCyclesPower = byte0 & 0x3f;
            final int byte1 = 0xff & coder.properties[1];
            final int ivSize = ((byte0 >> 6) & 1) + (byte1 & 0x0f);
            final int saltSize = ((byte0 >> 7) & 1) + (byte1 >> 4);
            if (2 + saltSize + ivSize > coder.properties.length) {
                throw new IOException("Salt size + IV size too long in " + archiveName);
            }
            final byte[] salt = new byte[saltSize];
            System.arraycopy(coder.properties, 2, salt, 0, saltSize);
            final byte[] iv = new byte[16];
            System.arraycopy(coder.properties, 2 + saltSize, iv, 0, ivSize);

            if (passwordBytes == null) {
                throw new PasswordRequiredException(archiveName);
            }
            final byte[] aesKeyBytes;
            if (numCyclesPower == 0x3f) {
                aesKeyBytes = new byte[32];
                System.arraycopy(salt, 0, aesKeyBytes, 0, saltSize);
                System.arraycopy(passwordBytes, 0, aesKeyBytes, saltSize,
                        Math.min(passwordBytes.length, aesKeyBytes.length - saltSize));
            } else {
                final MessageDigest digest;
                try {
                    digest = MessageDigest.getInstance("SHA-256");
                } catch (final NoSuchAlgorithmException noSuchAlgorithmException) {
                    throw new IOException("SHA-256 is unsupported by your Java implementation",
                            noSuchAlgorithmException);
                }
                final byte[] extra = new byte[8];
                for (long j = 0; j < (1L << numCyclesPower); j++) {
                    digest.update(salt);
                    digest.update(passwordBytes);
                    digest.update(extra);
                    for (int k = 0; k < extra.length; k++) {
                        ++extra[k];
                        if (extra[k] != 0) {
                            break;
                        }
                    }
                }
                aesKeyBytes = digest.digest();
            }

            final SecretKey aesKey = new SecretKeySpec(aesKeyBytes, "AES");
            try {
                final Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
                cipher.init(Cipher.DECRYPT_MODE, aesKey, new IvParameterSpec(iv));
                cipherInputStream = new CipherInputStream(in, cipher);
                isInitialized = true;
                return cipherInputStream;
            } catch (final GeneralSecurityException generalSecurityException) {
                throw new IOException("Decryption error "
                        + "(do you have the JCE Unlimited Strength Jurisdiction Policy Files installed?)",
                        generalSecurityException);
            }
        }

        @Override
        public int read() throws IOException {
            return init().read();
        }

        @Override
        public int read(final byte[] b, final int off, final int len) throws IOException {
            return init().read(b, off, len);
        }

        @Override
        public void close() {
        }
    };
}

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