Example usage for javax.crypto Cipher getMaxAllowedKeyLength

List of usage examples for javax.crypto Cipher getMaxAllowedKeyLength

  1. HOME
  2. Java
  3. javax
  4. javax.crypto.*
  5. Cipher
  6. getMaxAllowedKeyLength

Introduction

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

Prototype

public static final int getMaxAllowedKeyLength(String transformation) throws NoSuchAlgorithmException

Source Link

Document

Returns the maximum key length for the specified transformation according to the installed JCE jurisdiction policy files.

Usage

From source file:org.apache.nifi.security.util.crypto.CipherUtility.java

public static boolean isUnlimitedStrengthCryptoSupported() {
    try {//from w  w  w .  j  a v  a2 s . c  o  m
        return (Cipher.getMaxAllowedKeyLength("AES") > DEFAULT_MAX_ALLOWED_KEY_LENGTH);
    } catch (NoSuchAlgorithmException e) {
        return false;
    }
}

From source file:org.apache.pdfbox.encryption.TestSymmetricKeyEncryption.java

/**
 * {@inheritDoc}/*www  .  j  a va 2  s .co  m*/
 */
@Override
protected void setUp() throws Exception {
    testResultsDir.mkdirs();

    if (Cipher.getMaxAllowedKeyLength("AES") != Integer.MAX_VALUE) {
        // we need strong encryption for these tests
        fail("JCE unlimited strength jurisdiction policy files are not installed");
    }

    permission = new AccessPermission();
    permission.setCanAssembleDocument(false);
    permission.setCanExtractContent(false);
    permission.setCanExtractForAccessibility(true);
    permission.setCanFillInForm(false);
    permission.setCanModify(false);
    permission.setCanModifyAnnotations(false);
    permission.setCanPrint(true);
    permission.setCanPrintDegraded(false);
    permission.setReadOnly();
}

From source file:org.apache.pdfbox.pdmodel.encryption.StandardSecurityHandler.java

private static void logIfStrongEncryptionMissing() {
    try {//from  ww w.  j a v a 2s.c o  m
        if (Cipher.getMaxAllowedKeyLength("AES") != Integer.MAX_VALUE) {
            LOG.warn("JCE unlimited strength jurisdiction policy files are not installed");
        }
    } catch (NoSuchAlgorithmException ex) {
    }
}

From source file:org.eclipse.che.api.crypt.server.JCEEncryptTextService.java

@Override
public boolean isActive() {
    try {/*from   w ww .j  av  a 2  s  .c o m*/
        final int keyMaxLength = Cipher.getMaxAllowedKeyLength(this.cipher);
        boolean active = (keyMaxLength >= this.keySize);
        if (active) {
            LOG.debug("Encryption scheme {} enabled - max. allowed keysize={}", this.toString(), keyMaxLength);
        } else {
            LOG.debug("Encryption scheme {} disabled - max. allowed keysize={}", this.toString(), keyMaxLength);
        }
        return active;
    } catch (final NoSuchAlgorithmException e) {
        // cipher is not available
        LOG.debug("Encryption scheme {} disabled - algorithm is not available", this.toString());
        return false;
    }
}

From source file:org.jenkinsci.plugins.relution_publisher.configuration.jobs.ArtifactPublisher.java

private void logKeyLengthInformation(final Log log) {
    try {// ww w .j a  v  a 2 s. c  om
        final int maxKeyLength = Cipher.getMaxAllowedKeyLength("AES");
        final String value = (maxKeyLength < Integer.MAX_VALUE) ? String.valueOf(maxKeyLength) : "Unrestricted";

        log.write(this, "Max. allowed key length: %s", value);

    } catch (final NoSuchAlgorithmException e) {
        log.write(this, "Max. allowed key length: <error>");

    }
    this.testDHKeypairSize(log, 1024);
    this.testDHKeypairSize(log, 2048);
    this.testDHKeypairSize(log, 4096);
    log.write();
}

From source file:org.openhab.binding.loxone.internal.core.LxWsSecurityToken.java

private boolean initialize() {
    try {/* w  w  w  . j a  v a  2  s  .  c o m*/
        encryptionReady = false;
        tokenRefreshRetryCount = TOKEN_REFRESH_RETRY_COUNT;
        if (Cipher.getMaxAllowedKeyLength("AES") < 256) {
            return setError(LxOfflineReason.INTERNAL_ERROR,
                    "Enable Java cryptography unlimited strength (see binding doc).");
        }
        // generate a random key for the session
        KeyGenerator aesKeyGen = KeyGenerator.getInstance("AES");
        aesKeyGen.init(256);
        aesKey = aesKeyGen.generateKey();
        // generate an initialization vector
        secureRandom = new SecureRandom();
        secureRandom.nextBytes(initVector);
        IvParameterSpec ivSpec = new IvParameterSpec(initVector);
        // initialize aes cipher for command encryption
        aesEncryptCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        aesEncryptCipher.init(Cipher.ENCRYPT_MODE, aesKey, ivSpec);
        // initialize aes cipher for response decryption
        aesDecryptCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        aesDecryptCipher.init(Cipher.DECRYPT_MODE, aesKey, ivSpec);
        // get token value from configuration storage
        token = (String) configuration.get(SETTINGS_TOKEN);
        logger.debug("[{}] Retrieved token value: {}", debugId, token);
    } catch (InvalidParameterException e) {
        return setError(LxOfflineReason.INTERNAL_ERROR, "Invalid parameter: " + e.getMessage());
    } catch (NoSuchAlgorithmException e) {
        return setError(LxOfflineReason.INTERNAL_ERROR, "AES not supported on platform.");
    } catch (InvalidKeyException | NoSuchPaddingException | InvalidAlgorithmParameterException e) {
        return setError(LxOfflineReason.INTERNAL_ERROR, "AES cipher initialization failed.");
    }
    return true;
}

From source file:org.oscarehr.hospitalReportManager.SFTPConnector.java

/**
 * Given the absolute path of an encrypted file, decrypt the file using the specified AES key at the top. Return the
 * string value of the decrypted file./*from www  .j  a  va 2 s.  c o m*/
 * 
 * @param fullPath
 * @return
 * @throws Exception
 */
public static String decryptFile(String fullPath) throws Exception {
    logger.debug("About to decrypt: " + fullPath);
    File encryptedFile = new File(fullPath);
    if (!encryptedFile.exists()) {
        throw new Exception("Could not find file '" + fullPath + "' to decrypt.");
    }

    //get the bytes of the file in an array
    int fileLength = (int) encryptedFile.length();
    byte[] fileInBytes = new byte[fileLength];
    FileInputStream fin = new FileInputStream(encryptedFile);
    try {
        fin.read(fileInBytes);
    } finally {
        fin.close();
    }

    //the provided key is 32 characters long string hex representation of a 128 hex key, get the 128-bit hex bytes
    byte keyBytes[] = toHex(OscarProperties.getInstance().getProperty("OMD_HRM_DECRYPTION_KEY"));

    SecretKeySpec key = new SecretKeySpec(keyBytes, "AES");

    int maxKeyLen = Cipher.getMaxAllowedKeyLength("AES");

    Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding", "SunJCE");

    cipher.init(Cipher.DECRYPT_MODE, key);

    byte[] decode = cipher.doFinal(fileInBytes);

    return new String(decode);
}

From source file:org.texai.x509.X509Utils.java

/** Returns the maximum key length allowed by the ciphers on this JVM, which depends on whether the unlimited
 * strength encryption policy jar files have been downloaded and installed.
 *
 * @return the maximum allowed key size/*from ww w  .  j a v a 2s.c om*/
 * @throws NoSuchAlgorithmException when the encryption algorithm cannot be found
 */
public static int getMaxAllowedKeyLength() throws NoSuchAlgorithmException {
    return Cipher.getMaxAllowedKeyLength("AES");
}

From source file:t3si_server.AES.java

public static void print() throws NoSuchAlgorithmException {
    int length = Cipher.getMaxAllowedKeyLength("AES");
    System.out.println(length);//prints the max key length
}