Example usage for javax.crypto Cipher getIV

Introduction

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

Prototype

public final byte[] getIV() 

Source Link

Document

Returns the initialization vector (IV) in a new buffer.

Usage

From source file:com.adaptris.security.password.AesCrypto.java

public String encode(String plainText, String charset) throws PasswordException {
    String result = null;/*from  w  w w  .j a  v  a 2s .com*/
    try {
        KeyGenerator kg = KeyGenerator.getInstance(ALG);
        kg.init(KEY_LEN, SecurityUtil.getSecureRandom());
        SecretKey sessionKey = kg.generateKey();
        Cipher dataCipher = Cipher.getInstance(CIPHER);
        dataCipher.init(Cipher.ENCRYPT_MODE, sessionKey);
        byte[] encryptedBody = dataCipher.doFinal(seed(plainText, charset));
        Output output = new Output();
        output.setSessionKey(sessionKey.getEncoded());
        output.setSessionVector(dataCipher.getIV());
        output.setEncryptedData(encryptedBody);
        result = Password.PORTABLE_PASSWORD + output.write();
    } catch (Exception e) {
        throw new PasswordException(e);
    }
    return result;
}

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From source file:com.jefftharris.passwdsafe.SavedPasswordsMgr.java

/**
 * Add a saved password for a file/*www .j  a  v  a2s. c o m*/
 */
public void addSavedPassword(Uri fileUri, String password, Cipher cipher)
        throws UnsupportedEncodingException, BadPaddingException, IllegalBlockSizeException {
    byte[] enc = cipher.doFinal(password.getBytes("UTF-8"));
    String encStr = Base64.encodeToString(enc, Base64.NO_WRAP);
    String ivStr = Base64.encodeToString(cipher.getIV(), Base64.NO_WRAP);

    String keyName = getPrefsKey(fileUri);
    SharedPreferences prefs = getPrefs();
    prefs.edit().putString(keyName, encStr).putString(getIvPrefsKey(keyName), ivStr).apply();
}

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From source file:com.kuzumeji.platform.standard.SecurityService.java

/**
 * ??//  w  w w. j a  v  a 2s.c  om
 * <dl>
 * <dt>?
 * <dd>AES??????
 * </dl>
 * @param key ?
 * @param plain 
 * @return {@link SecuredData ?}
 */
public SecuredData encrypt(final byte[] key, final byte[] plain) {
    try {
        final Cipher cipher = Cipher.getInstance(AES_TRANSFORM_NAME);
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(key, AES_ALGO_NAME));
        try (final ByteArrayOutputStream bos = new ByteArrayOutputStream();) {
            bos.write(cipher.doFinal(plain));
            return new SecuredData(bos.toByteArray(), cipher.getIV());
        }
    } catch (InvalidKeyException | NoSuchAlgorithmException | NoSuchPaddingException | IllegalBlockSizeException
            | BadPaddingException | IOException e) {
        throw new RuntimeException(e);
    }
}

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From source file:com.zacwolf.commons.crypto._CRYPTOfactory.java

public final byte[] encrypt(final byte[] bytes)
        throws InvalidKeyException, IllegalBlockSizeException, BadPaddingException, NoSuchAlgorithmException,
        NoSuchPaddingException, InvalidAlgorithmParameterException {
    ready();/*  www  .  j a v a  2s.  c  om*/
    activecrypts++;
    try {
        final Cipher ecipher = this.crypter.getEcipher();
        byte[] salt = ecipher.getIV();
        final ByteBuffer outbuf = ByteBuffer
                .allocate(ecipher.getOutputSize(bytes.length) + (salt != null ? salt.length : 0) + 1);
        if (salt != null) {
            outbuf.put((byte) salt.length);
            outbuf.put(salt);
        } else
            outbuf.put((byte) 0);
        try {
            ecipher.doFinal(ByteBuffer.wrap(bytes), outbuf);
        } catch (ShortBufferException e) {
            // not going to happen since we specifically allocate based on the cipher output size
        }
        return outbuf.array();
    } finally {
        activecrypts--;
    }
}

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From source file:com.zacwolf.commons.crypto._CRYPTOfactory.java

public final void encryptObjToOutputStream(final Serializable obj, final OutputStream outputStream)
        throws InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException,
        InvalidAlgorithmParameterException, IOException {
    if (outputStream instanceof ObjectOutputStream)
        throw new IOException(
                "encryptObjToOutputStream already wraps the outputStream in an ObjectOutputStream, so only pass-in a non-ObjectOutputStream wrapped stream");

    ready();//from ww  w  .  ja v a2  s  .co m
    activecrypts++;
    try {
        final Cipher ecipher = crypter.getEcipher();
        final byte[] salt = ecipher.getIV();
        if (salt == null) {
            outputStream.write(0);
        } else {
            outputStream.write(salt.length);
            for (byte s : salt)
                outputStream.write(s);
        }
        final CipherOutputStream cos = new CipherOutputStream(outputStream, ecipher) {
            /*
             * WebSphere 7 has a known bug with it's implementation of ibmjceprovider.jar
             * concerning writing byte-arrays in a serialized object when the byte-array length
             * is zero.
             * see: http://www.ibm.com/developerworks/forums/thread.jspa?messageID=14597510
             * 
             * Added an override of the CipherOutputStream write method so that it is only called when
             * the byte array has length > 0
             */
            @Override
            public void write(final byte[] b, final int off, final int len) throws IOException {
                if (len > 0) {
                    super.write(b, off, len);
                    //super.flush();
                }
            }
        };
        final ObjectOutputStream oos = new ObjectOutputStream(cos);
        oos.writeObject(obj);
        oos.flush();
        oos.close();
    } finally {
        activecrypts--;
    }
}

---

From source file:com.zacwolf.commons.crypto._CRYPTOfactory.java

public final void encryptToOutputStream(final byte[] bytes, final OutputStream outputStream)
        throws InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException,
        InvalidAlgorithmParameterException, IOException {
    ready();//from   w ww  .j a v a2s  . c o  m
    activecrypts++;
    try {
        final Cipher ecipher = crypter.getEcipher();
        final byte[] salt = ecipher.getIV();
        if (salt == null) {
            outputStream.write(0);
        } else {
            outputStream.write(salt.length);
            outputStream.write(salt);
        }
        outputStream.flush();
        CipherOutputStream cop = null;
        try {
            cop = new CipherOutputStream(outputStream, ecipher) {
                /*
                 * WebSphere 7 has a known bug with it's implementation of ibmjceprovider.jar
                 * concerning writing byte-arrays in a serialized object when the byte-array length
                 * is zero.
                 * see: http://www.ibm.com/developerworks/forums/thread.jspa?messageID=14597510
                 * 
                 * Added an override of the CipherOutputStream write method so that it is only called when
                 * the byte array has length > 0
                 */
                @Override
                public void write(final byte[] b, final int off, final int len) throws IOException {
                    if (len > 0) {
                        super.write(b, off, len);
                        //super.flush(); Do NOT flush here, as it slows the process down exponentially
                    }
                }
            };
            cop.write(bytes);
            cop.flush();
        } finally {
            if (cop != null) {
                cop.flush();
                cop.close();
            }
            outputStream.flush();
            outputStream.close();
        }
    } finally {
        activecrypts--;
    }
}

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From source file:com.evolveum.midpoint.prism.crypto.AESProtector.java

private byte[] encryptBytes(byte[] clearData, String algorithmUri, Key key)
        throws NoSuchAlgorithmException, NoSuchPaddingException, NoSuchProviderException, InvalidKeyException,
        IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException {
    Cipher cipher = getCipher(Cipher.ENCRYPT_MODE, algorithmUri);
    cipher.init(Cipher.ENCRYPT_MODE, key);

    byte[] encryptedData = cipher.doFinal(clearData);

    // Place IV at the beginning of the encrypted bytes so it can be reused on decryption
    byte[] iv = cipher.getIV();
    byte[] encryptedBytes = new byte[iv.length + encryptedData.length];
    System.arraycopy(iv, 0, encryptedBytes, 0, iv.length);
    System.arraycopy(encryptedData, 0, encryptedBytes, iv.length, encryptedData.length);

    return encryptedBytes;
}

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From source file:org.nuxeo.ecm.core.blob.binary.AESBinaryManager.java

/**
 * Encrypts the given input stream into the given output stream, while also computing the digest of the input
 * stream.//from  w w  w . ja  va 2 s .  c  o m
 * <p>
 * File format version 1 (values are in network order):
 * <ul>
 * <li>10 bytes: magic number "NUXEOCRYPT"
 * <li>1 byte: file format version = 1
 * <li>1 byte: use keystore = 1, use PBKDF2 = 2
 * <li>if use PBKDF2:
 * <ul>
 * <li>4 bytes: salt length = n
 * <li>n bytes: salt data
 * </ul>
 * <li>4 bytes: IV length = p
 * <li>p bytes: IV data
 * <li>x bytes: encrypted stream
 * </ul>
 *
 * @param in the input stream containing the data
 * @param file the file containing the encrypted data
 * @return the digest of the input stream
 */
@Override
public String storeAndDigest(InputStream in, OutputStream out) throws IOException {
    out.write(FILE_MAGIC);
    DataOutputStream data = new DataOutputStream(out);
    data.writeByte(FILE_VERSION_1);

    try {
        // get digest to use
        MessageDigest messageDigest = MessageDigest.getInstance(digestAlgorithm);

        // secret key
        Key secret;
        if (usePBKDF2) {
            data.writeByte(USE_PBKDF2);
            // generate a salt
            byte[] salt = new byte[16];
            RANDOM.nextBytes(salt);
            // generate secret key
            secret = generateSecretKey(salt);
            // write salt
            data.writeInt(salt.length);
            data.write(salt);
        } else {
            data.writeByte(USE_KEYSTORE);
            // find secret key from keystore
            secret = getSecretKey();
        }

        // cipher
        Cipher cipher = Cipher.getInstance(AES_CBC_PKCS5_PADDING);
        cipher.init(Cipher.ENCRYPT_MODE, secret);

        // write IV
        byte[] iv = cipher.getIV();
        data.writeInt(iv.length);
        data.write(iv);

        // digest and write the encrypted data
        CipherAndDigestOutputStream cipherOut = new CipherAndDigestOutputStream(out, cipher, messageDigest);
        IOUtils.copy(in, cipherOut);
        cipherOut.close();
        byte[] digest = cipherOut.getDigest();
        return toHexString(digest);
    } catch (GeneralSecurityException e) {
        throw new NuxeoException(e);
    }

}

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From source file:test.PBEncryptLink.java

/**
 * Initialize the Cipher object using the given key. If the Initialization
 * vaector has not already been stored (as an IvParameterSpec), then, for
 * encryption, one is created and stored. If the CipherMode is DECRYPT and
 * no initialization vector has been set, then an
 * InvalidAlgorithmParameterException is thrown.
 * /* ww w  . ja v a2 s  .c  om*/
 * @param key
 * @throws InvalidKeyException
 * @throws InvalidAlgorithmParameterException
 *             Hmm.
 */
public void initCipher(byte[] key) throws InvalidKeyException, InvalidAlgorithmParameterException {
    SecretKeySpec skeySpec = new SecretKeySpec(key, "Blowfish");
    Cipher cipher = getBlowfishCipher();
    IvParameterSpec ivs = getIvParmSpec();

    int intCipherMode = -1;
    switch (getCipherMode()) {
    case ENCRYPT:
        intCipherMode = Cipher.ENCRYPT_MODE;
        if (ivs == null) {

            cipher.init(intCipherMode, skeySpec);
            setIV(cipher.getIV());
        } else {
            cipher.init(intCipherMode, skeySpec, ivs);
        }
        break;
    case DECRYPT:
        intCipherMode = Cipher.DECRYPT_MODE;
        cipher.init(intCipherMode, skeySpec, ivs);
    default:
        break;
    }
    if (intCipherMode == -1) {
        return;
    }

}

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

@Nullable
@RequiresApi(api = Build.VERSION_CODES.M)
private Cipher createCipher(int mode) throws NoSuchPaddingException, NoSuchAlgorithmException,
        UnrecoverableKeyException, KeyStoreException, InvalidKeyException, InvalidAlgorithmParameterException {
    Cipher cipher = Cipher.getInstance(KeyProperties.KEY_ALGORITHM_AES + "/" + KeyProperties.BLOCK_MODE_CBC
            + "/" + KeyProperties.ENCRYPTION_PADDING_PKCS7);

    Key key = keyStore.getKey(KEYSTORE_ALIAS, null);
    if (key == null) {
        return null;
    }/*ww w .j a  v  a  2 s .  c  o m*/
    if (mode == Cipher.ENCRYPT_MODE) {
        cipher.init(mode, key);
        byte[] iv = cipher.getIV();
        saveIv(iv);
    } else {
        byte[] lastIv = getLastIv();
        cipher.init(mode, key, new IvParameterSpec(lastIv));
    }
    return cipher;
}

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