Examples with Cipher javax.crypto.Cipher used on opensource projects

Example 26 with Cipher

use of javax.crypto.Cipher in project hudson-2.x by hudson.

the class Secret method getEncryptedValue.

/**
     * Encrypts {@link #value} and returns it in an encoded printable form.
     *
     * @see #toString() 
     */
public String getEncryptedValue() {
    try {
        Cipher cipher = getCipher("AES");
        cipher.init(Cipher.ENCRYPT_MODE, getKey());
        // add the magic suffix which works like a check sum.
        return new String(Base64.encode(cipher.doFinal((value + MAGIC).getBytes("UTF-8"))));
    } catch (GeneralSecurityException e) {
        // impossible
        throw new Error(e);
    } catch (UnsupportedEncodingException e) {
        // impossible
        throw new Error(e);
    }
}

Example 27 with Cipher

use of javax.crypto.Cipher in project hudson-2.x by hudson.

the class Secret method decrypt.

/**
     * Reverse operation of {@link #getEncryptedValue()}. Returns null
     * if the given cipher text was invalid.
     */
public static Secret decrypt(String data) {
    if (data == null)
        return null;
    try {
        Cipher cipher = getCipher("AES");
        cipher.init(Cipher.DECRYPT_MODE, getKey());
        String plainText = new String(cipher.doFinal(Base64.decode(data.toCharArray())), "UTF-8");
        if (plainText.endsWith(MAGIC))
            return new Secret(plainText.substring(0, plainText.length() - MAGIC.length()));
        return null;
    } catch (GeneralSecurityException e) {
        return null;
    } catch (UnsupportedEncodingException e) {
        // impossible
        throw new Error(e);
    } catch (IOException e) {
        return null;
    }
}

Example 28 with Cipher

use of javax.crypto.Cipher in project Openfire by igniterealtime.

the class AesEncryptor method cipher.

/**
	 * Symmetric encrypt/decrypt routine.
	 *
	 * @param attribute The value to be converted
	 * @param key The encryption key
	 * @param mode The cipher mode (encrypt or decrypt)
	 * @return The converted attribute, or null if conversion fails
	 */
private byte[] cipher(byte[] attribute, byte[] key, int mode) {
    byte[] result = null;
    try {
        // Create AES encryption key
        Key aesKey = new SecretKeySpec(key, "AES");
        // Create AES Cipher
        Cipher aesCipher = Cipher.getInstance(ALGORITHM);
        // Initialize AES Cipher and convert
        aesCipher.init(mode, aesKey, new IvParameterSpec(INIT_PARM));
        result = aesCipher.doFinal(attribute);
    } catch (Exception e) {
        log.error("AES cipher failed", e);
    }
    return result;
}

Example 29 with Cipher

use of javax.crypto.Cipher in project Openfire by igniterealtime.

the class Crypto method generateAESKeystream.

public static Byte[] generateAESKeystream(Byte[] key, Integer length, Byte[] counter) {
    byte[] output = new byte[length.intValue()];
    for (int i = 0; i < output.length; i++) output[i] = 0;
    byte[] input = BitAssistant.bytesFromArray(counter);
    try {
        Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding");
        cipher.init(1, new SecretKeySpec(BitAssistant.bytesFromArray(key), "AES"));
        for (int i = 0; i < length.intValue(); i += 16) {
            cipher.update(input, 0, 16, output, i);
            IncrementCounter(input);
        }
        for (int i = 0; i < counter.length; i++) counter[i] = Byte.valueOf(input[i]);
        return BitAssistant.bytesToArray(output);
    } catch (Exception e) {
        return new Byte[0];
    }
}

Example 30 with Cipher

use of javax.crypto.Cipher in project hudson-2.x by hudson.

the class AnnotatedLargeText method createAnnotator.

private ConsoleAnnotator createAnnotator(StaplerRequest req) throws IOException {
    try {
        String base64 = req != null ? req.getHeader("X-ConsoleAnnotator") : null;
        if (base64 != null) {
            Cipher sym = Secret.getCipher("AES");
            sym.init(Cipher.DECRYPT_MODE, Hudson.getInstance().getSecretKeyAsAES128());
            ObjectInputStream ois = new ObjectInputStreamEx(new GZIPInputStream(new CipherInputStream(new ByteArrayInputStream(Base64.decode(base64.toCharArray())), sym)), Hudson.getInstance().pluginManager.uberClassLoader);
            long timestamp = ois.readLong();
            if (TimeUnit2.HOURS.toMillis(1) > abs(System.currentTimeMillis() - timestamp))
                // don't deserialize something too old to prevent a replay attack
                return (ConsoleAnnotator) ois.readObject();
        }
    } catch (GeneralSecurityException e) {
        throw new IOException2(e);
    } catch (ClassNotFoundException e) {
        throw new IOException2(e);
    }
    // start from scratch
    return ConsoleAnnotator.initial(context == null ? null : context.getClass());
}