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:license.regist.ReadProjectInfo.java

private static byte[] rsa(byte[] key) throws Exception {
    PublicKey pubKey = readPublicKeyFromFile();
    Cipher cipher = Cipher.getInstance("RSA");
    cipher.init(2, pubKey);
    return cipher.doFinal(key);
}

From source file:hh.learnj.test.license.test.rsa.RSATest.java

/**
 * ?//from  w  w w.ja va  2s .  c o  m
 * 
 * @param data
 * @return
 * @throws Exception
 */
static String encryptionByPrivateKey(String source) throws Exception {
    PrivateKey privateKey = getPrivateKey();
    Cipher cipher = Cipher.getInstance(privateKey.getAlgorithm());
    cipher.init(Cipher.ENCRYPT_MODE, privateKey);
    cipher.update(source.getBytes("UTF-8"));
    String target = encodeBase64(cipher.doFinal());
    System.out.println("???\r\n" + target);
    return target;
}

From source file:com.wabacus.util.DesEncryptTools.java

public static String encrypt(String originalString) {
    if (originalString == null || originalString.trim().equals(""))
        return "";
    if (KEY_OBJ == null) {
        log.warn("");
        return originalString;
    }/*from  ww  w .j av a2 s. c om*/
    try {
        Cipher c1 = Cipher.getInstance(Algorithm);
        c1.init(Cipher.ENCRYPT_MODE, KEY_OBJ);
        return base64Encode(c1.doFinal(originalString.getBytes()));
    } catch (Exception e) {
        log.error("" + originalString + "", e);
        return null;
    }
}

From source file:org.oscarehr.common.hl7.v2.oscar_to_oscar.SendingUtils.java

private static byte[] encryptEncryptionKey(SecretKey senderSecretKey, PublicKey receiverOscarKey)
        throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException,
        BadPaddingException {//from   www . ja v a 2 s .  c o  m
    Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
    cipher.init(Cipher.ENCRYPT_MODE, receiverOscarKey);
    return (cipher.doFinal(senderSecretKey.getEncoded()));
}

From source file:Main.java

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

    log("decryptedBytes", decryptedBytes);

    return decryptedBytes;
}

From source file:com.servoy.j2db.util.SecuritySupport.java

@SuppressWarnings("nls")
public static String encrypt(Settings settings, String value) throws Exception {
    if (value == null)
        return value;
    Cipher cipher = Cipher.getInstance("DESede");
    cipher.init(Cipher.ENCRYPT_MODE, SecuritySupport.getCryptKey(settings));
    return Utils.encodeBASE64(cipher.doFinal(value.getBytes()));
}

From source file:com.servoy.j2db.util.SecuritySupport.java

@SuppressWarnings("nls")
public static String decrypt(Settings settings, String value) throws Exception {
    if (value == null)
        return value;
    Cipher cipher = Cipher.getInstance("DESede");
    cipher.init(Cipher.DECRYPT_MODE, SecuritySupport.getCryptKey(settings));
    return new String(cipher.doFinal(Utils.decodeBASE64(value)));
}

From source file:com.servoy.j2db.util.SecuritySupport.java

@SuppressWarnings("nls")
public static String encryptUrlSafe(Settings settings, String value) throws Exception {
    if (value == null)
        return value;
    Cipher cipher = Cipher.getInstance("DESede");
    cipher.init(Cipher.ENCRYPT_MODE, SecuritySupport.getCryptKey(settings));
    return Base64.encodeBase64URLSafeString(cipher.doFinal(value.getBytes()));
}

From source file:Main.java

@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
private static String decryptStringImpl(Context context, final String encryptedText) {
    String plainText = null;//from  w  ww  .j a  v  a2  s .c  o  m
    try {
        final KeyStore keyStore = getKeyStore(context);

        PrivateKey privateKey = (PrivateKey) keyStore.getKey(KEY_ALIAS, null);

        String algorithm = ALGORITHM_OLD;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            algorithm = ALGORITHM;
        }
        Cipher cipher = Cipher.getInstance(algorithm);
        cipher.init(Cipher.DECRYPT_MODE, privateKey);

        CipherInputStream cipherInputStream = new CipherInputStream(
                new ByteArrayInputStream(Base64.decode(encryptedText, Base64.DEFAULT)), cipher);

        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        int b;
        while ((b = cipherInputStream.read()) != -1) {
            outputStream.write(b);
        }
        outputStream.close();
        plainText = outputStream.toString("UTF-8");
    } catch (Exception e) {
        e.printStackTrace();
    }
    return plainText;
}

From source file:com.hernandez.rey.crypto.TripleDES.java

/**
 * Use the specified TripleDES key to decrypt bytes ready from the input stream and write them to the output stream.
 * This method uses uses Cipher directly to show how it can be done without CipherInputStream and CipherOutputStream.
 * /*www. j  av a  2 s. c om*/
 * @param key the key for decryption
 * @param in
 * @param out
 * @throws NoSuchAlgorithmException
 * @throws InvalidKeyException
 * @throws IOException
 * @throws IllegalBlockSizeException
 * @throws NoSuchPaddingException
 * @throws BadPaddingException
 */
public static void decrypt(final SecretKey key, final InputStream in, final OutputStream out)
        throws NoSuchAlgorithmException, InvalidKeyException, IOException, IllegalBlockSizeException,
        NoSuchPaddingException, BadPaddingException {
    // Create and initialize the decryption engine
    final Cipher cipher = Cipher.getInstance("DESede");
    cipher.init(Cipher.DECRYPT_MODE, key);

    // Read bytes, decrypt, and write them out.
    final byte[] buffer = new byte[2048];
    int bytesRead;
    while ((bytesRead = in.read(buffer)) != -1) {
        out.write(cipher.update(buffer, 0, bytesRead));
    }

    // Write out the final bunch of decrypted bytes
    out.write(cipher.doFinal());
    out.flush();
}