Example usage for javax.crypto Cipher doFinal

Introduction

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

Prototype

public final byte[] doFinal(byte[] input) throws IllegalBlockSizeException, BadPaddingException 

Source Link

Document

Encrypts or decrypts data in a single-part operation, or finishes a multiple-part operation.

Usage

From source file:com.glaf.core.security.SecurityUtils.java

/**
 * ?????,??//from  w  w w . j  av  a  2  s.c  o m
 * 
 * @param ctx
 *            
 * @param symmetryKey
 *            
 * @param pubKey
 *            
 * @return String(?base64?)
 */
public static String generateDigitalEnvelope(SecurityContext ctx, Key symmetryKey, byte[] pubKey) {
    String result = null;
    InputStream inputStream = null;
    try {
        CertificateFactory cf = CertificateFactory.getInstance("X.509");
        inputStream = new ByteArrayInputStream(pubKey);
        java.security.cert.Certificate cert = cf.generateCertificate(inputStream);
        inputStream.close();
        PublicKey publicKey = cert.getPublicKey();
        Cipher cipher = Cipher.getInstance(ctx.getAsymmetryAlgorithm());

        cipher.init(Cipher.ENCRYPT_MODE, publicKey);
        result = Base64.encodeBase64String(cipher.doFinal(symmetryKey.getEncoded()));
        return result;
    } catch (Exception ex) {
        throw new SecurityException(ex);
    } finally {
        try {
            if (inputStream != null) {
                inputStream.close();
                inputStream = null;
            }
        } catch (IOException ex) {
        }
    }
}

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From source file:com.hp.application.automation.tools.EncryptionUtils.java

public static String Decrypt(String text, String key) throws Exception {

    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    byte[] keyBytes = new byte[16];
    byte[] b = key.getBytes("UTF-8");
    int len = b.length;
    if (len > keyBytes.length)
        len = keyBytes.length;//from  w  w w.j a  va2  s  .c  o  m
    System.arraycopy(b, 0, keyBytes, 0, len);
    SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");
    IvParameterSpec ivSpec = new IvParameterSpec(keyBytes);
    cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
    byte[] results = cipher.doFinal(Base64.decodeBase64(text));

    return new String(results, "UTF-8");
}

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From source file:com.hp.application.automation.tools.EncryptionUtils.java

public static String Encrypt(String text, String key) throws Exception {

    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    byte[] keyBytes = new byte[16];
    byte[] b = key.getBytes("UTF-8");
    int len = b.length;
    if (len > keyBytes.length)
        len = keyBytes.length;//  w  ww . j  a  v  a2  s .com
    System.arraycopy(b, 0, keyBytes, 0, len);
    SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");
    IvParameterSpec ivSpec = new IvParameterSpec(keyBytes);
    cipher.init(Cipher.ENCRYPT_MODE, keySpec, ivSpec);
    byte[] results = cipher.doFinal(text.getBytes("UTF-8"));

    return Base64.encodeBase64String(results);
}

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From source file:com.ibasco.agql.examples.base.BaseExample.java

/**
 * @see <a href="https://gist.github.com/bricef/2436364">https://gist.github.com/bricef/2436364</a>
 *///from   w ww.  ja v a 2 s . com
public static String encrypt(String plainText) throws Exception {
    Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding", "SunJCE");
    SecretKeySpec key = new SecretKeySpec(worldsMostSecureUnhackableKey.getBytes("UTF-8"), "AES");
    cipher.init(Cipher.ENCRYPT_MODE, key,
            new IvParameterSpec(worldsMostSecureUnhackableIvKey.getBytes("UTF-8")));
    return Base64.getEncoder().encodeToString((cipher.doFinal(padNullBytes(plainText))));
}

---

From source file:com.ligadata.Utils.EncryptDecryptUtils.java

/**
 * Decrypt text using private key./*from  w w w  . j  a  va2 s  .c o  m*/
 * 
 * @param algorithm
 *          : algorithm used
 * @param text
 *          :encrypted text
 * @param key
 *          :The private key
 * @return plain text
 * @throws java.lang.Exception
 */
public static String decrypt(String algorithm, byte[] text, String privateKeyFile) throws Exception {
    byte[] dectyptedText = null;
    try {
        ObjectInputStream inputStream = null;
        // Decrypt the cipher text using the private key.
        inputStream = new ObjectInputStream(new FileInputStream(privateKeyFile));
        final PrivateKey privateKey = (PrivateKey) inputStream.readObject();
        // get a cipher object and print the provider
        final Cipher cipher = Cipher.getInstance(algorithm);
        // decrypt the text using the private key
        cipher.init(Cipher.DECRYPT_MODE, privateKey);
        dectyptedText = cipher.doFinal(text);
    } catch (Exception e) {
        logger.error("Failed to decrypt given password", e);
        throw e;
    }
    return new String(dectyptedText);
}

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From source file:io.zipi.common.util.AesEncrypter.java

/**
 * Decrypt./*from w w w. j a v  a 2  s .  c o  m*/
 * @param encryptedText the encrypted text
 * @param secretKey the secret key
 * @return the string
 */
public static final String decrypt(String secretKey, String encryptedText) {
    if (encryptedText == null) {
        return null;
    }
    if (encryptedText.startsWith("$CRYPT::")) { //$NON-NLS-1$
        byte[] decoded = Base64.decodeBase64(encryptedText.substring(8));
        Cipher cipher;
        try {
            SecretKeySpec skeySpec = keySpecFromSecretKey(secretKey);

            cipher = Cipher.getInstance("AES"); //$NON-NLS-1$
            cipher.init(Cipher.DECRYPT_MODE, skeySpec);
        } catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException e) {
            throw new RuntimeException(e);
        }
        try {
            return new String(cipher.doFinal(decoded));
        } catch (IllegalBlockSizeException | BadPaddingException e) {
            throw new RuntimeException(e);
        }
    } else {
        return encryptedText;
    }
}

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From source file:bioLockJ.module.agent.MailAgent.java

private static String encrypt(final String password)
        throws GeneralSecurityException, UnsupportedEncodingException {
    final SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
    final SecretKey key = keyFactory.generateSecret(new PBEKeySpec(PASSWORD));
    final Cipher pbeCipher = Cipher.getInstance("PBEWithMD5AndDES");
    pbeCipher.init(Cipher.ENCRYPT_MODE, key, new PBEParameterSpec(SALT, 20));
    return base64Encode(pbeCipher.doFinal(password.getBytes("UTF-8")));
}

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From source file:com.glaf.core.security.RSAUtils.java

/**
 * ?//from  w  ww.j av  a2s  . c  o m
 * 
 * @param publicKey
 *            
 * @param data
 *            ??
 * @return ??
 */
public static byte[] encrypt(PublicKey publicKey, byte[] data) throws Exception {
    Cipher ci = Cipher.getInstance(ALGORITHOM, DEFAULT_PROVIDER);
    ci.init(Cipher.ENCRYPT_MODE, publicKey);
    return ci.doFinal(data);
}

---

From source file:com.cws.esolutions.security.utils.PasswordUtils.java

/**
 * Provides two-way (reversible) encryption of a provided string. Can be used where reversibility
 * is required but encryption (obfuscation, technically) is required.
 *
 * @param value - The plain text data to encrypt
 * @param salt - The salt value to utilize for the request
 * @param secretInstance - The cryptographic instance to use for the SecretKeyFactory
 * @param iterations - The number of times to loop through the keyspec
 * @param keyBits - The size of the key, in bits
 * @param algorithm - The algorithm to encrypt the data with
 * @param cipherInstance - The cipher instance to utilize
 * @param encoding - The text encoding//from   www .  ja  v a 2  s. co m
 * @return The encrypted string in a reversible format
 * @throws SecurityException {@link java.lang.SecurityException} if an exception occurs during processing
 */
public static final String decryptText(final String value, final String salt, final String secretInstance,
        final int iterations, final int keyBits, final String algorithm, final String cipherInstance,
        final String encoding) throws SecurityException {
    final String methodName = PasswordUtils.CNAME
            + "#encryptText(final String value, final String salt, final String secretInstance, final int iterations, final int keyBits, final String algorithm, final String cipherInstance, final String encoding) throws SecurityException";

    if (DEBUG) {
        DEBUGGER.debug(methodName);
        DEBUGGER.debug("Value: {}", secretInstance);
        DEBUGGER.debug("Value: {}", iterations);
        DEBUGGER.debug("Value: {}", keyBits);
        DEBUGGER.debug("Value: {}", algorithm);
        DEBUGGER.debug("Value: {}", cipherInstance);
        DEBUGGER.debug("Value: {}", encoding);
    }

    String decPass = null;

    try {
        String decoded = new String(Base64.getDecoder().decode(value));
        String iv = decoded.split(":")[0];
        String property = decoded.split(":")[1];

        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(secretInstance);
        PBEKeySpec keySpec = new PBEKeySpec(salt.toCharArray(), salt.getBytes(), iterations, keyBits);
        SecretKey keyTmp = keyFactory.generateSecret(keySpec);
        SecretKeySpec sks = new SecretKeySpec(keyTmp.getEncoded(), algorithm);

        Cipher pbeCipher = Cipher.getInstance(cipherInstance);
        pbeCipher.init(Cipher.DECRYPT_MODE, sks, new IvParameterSpec(Base64.getDecoder().decode(iv)));
        decPass = new String(pbeCipher.doFinal(Base64.getDecoder().decode(property)), encoding);
    } catch (InvalidKeyException ikx) {
        throw new SecurityException(ikx.getMessage(), ikx);
    } catch (NoSuchAlgorithmException nsx) {
        throw new SecurityException(nsx.getMessage(), nsx);
    } catch (NoSuchPaddingException npx) {
        throw new SecurityException(npx.getMessage(), npx);
    } catch (IllegalBlockSizeException ibx) {
        throw new SecurityException(ibx.getMessage(), ibx);
    } catch (BadPaddingException bpx) {
        throw new SecurityException(bpx.getMessage(), bpx);
    } catch (UnsupportedEncodingException uex) {
        throw new SecurityException(uex.getMessage(), uex);
    } catch (InvalidAlgorithmParameterException iapx) {
        throw new SecurityException(iapx.getMessage(), iapx);
    } catch (InvalidKeySpecException iksx) {
        throw new SecurityException(iksx.getMessage(), iksx);
    }

    return decPass;
}

---

From source file:com.glaf.core.security.RSAUtils.java

/**
 * ??// w  w w .  j a v  a2  s. c  om
 * 
 * @param privateKey
 *            ?
 * @param data
 *            ??
 * @return ?
 */
public static byte[] decrypt(PrivateKey privateKey, byte[] data) throws Exception {
    Cipher ci = Cipher.getInstance(ALGORITHOM, DEFAULT_PROVIDER);
    ci.init(Cipher.DECRYPT_MODE, privateKey);
    return ci.doFinal(data);
}

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