Example usage for javax.crypto CipherInputStream CipherInputStream

Introduction

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

Prototype

public CipherInputStream(InputStream is, Cipher c) 

Source Link

Document

Constructs a CipherInputStream from an InputStream and a Cipher.

Usage

From source file:com.cubusmail.server.mail.security.MailPasswordEncryptor.java

public String decryptPassword(byte[] encryptedPassword) {

    Cipher cipher;//from  w ww .  ja  v  a2  s.c o  m
    try {
        log.debug("decrypt...");
        cipher = Cipher.getInstance(this.algorithm);
        cipher.init(Cipher.DECRYPT_MODE, this.keyPair.getPrivate());

        CipherInputStream cis = new CipherInputStream(new ByteArrayInputStream(encryptedPassword), cipher);
        ByteArrayOutputStream baosDecryptedData = new ByteArrayOutputStream();
        byte[] buffer = new byte[8192];
        int len = 0;
        while ((len = cis.read(buffer)) > 0) {
            baosDecryptedData.write(buffer, 0, len);
        }
        baosDecryptedData.flush();
        cis.close();

        log.debug("...finish");

        return new String(baosDecryptedData.toByteArray());
    } catch (Exception e) {
        log.error(e.getMessage(), e);
        throw new IllegalStateException(e.getMessage(), e);
    }
}

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From source file:sec_algo.commonenc.java

/**
* Decrypts an AES key from a file using an RSA private key
*///from   w  ww. j  av a2s .c  o  m
public void loadKey(File in, File privateKeyFile) {
    try {
        // read private key to be used to decrypt the AES key
        byte[] encodedKey = new byte[(int) privateKeyFile.length()];
        new FileInputStream(privateKeyFile).read(encodedKey);

        // create private key
        PKCS8EncodedKeySpec privateKeySpec = new PKCS8EncodedKeySpec(encodedKey);
        KeyFactory kf = KeyFactory.getInstance("RSA");
        PrivateKey pk = kf.generatePrivate(privateKeySpec);

        // read AES key
        pkCipher.init(Cipher.DECRYPT_MODE, pk);
        key = new byte[AES_Key_Size / 8];
        CipherInputStream is = new CipherInputStream(new FileInputStream(in), pkCipher);
        is.read(key);
        secretkey = new SecretKeySpec(key, "AES");
    } catch (Exception e) {
        e.printStackTrace();
    }
}

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From source file:de.marius_oe.cfs.cryption.Crypter.java

/**
 * Decrypts the given input stream and stores the decrypted bytes in the
 * destinationFile. If compressStream is <code>true</code>, the given stream
 * has been compressed and is uncompressed after decryption.
 *
 * @param inStream/*from ww  w  .  j ava2  s  .c o m*/
 *            source stream with encrypted data and iv at the beginning
 * @param destinationStream
 *            stream for the decrypted data
 * @param compressStream
 *            whether the stream was compressed before encryption
 */
public static void decrypt(InputStream inStream, OutputStream destinationStream, boolean compressStream) {
    logger.debug("decrypting inputstream - compressed: {}", compressStream);

    try {
        // reading iv of stream
        int ivLength = inStream.read();
        byte[] iv = new byte[ivLength];
        inStream.read(iv);

        logger.debug("Decrypt InputStream.");
        inStream = new CipherInputStream(inStream, getCipher(Cipher.DECRYPT_MODE, iv));

        if (compressStream) {
            logger.debug("Decompress InputStream.");

            try {
                inStream = new ZipInputStream(inStream);
                ((ZipInputStream) inStream).getNextEntry();
            } catch (IOException e) {
                logger.debug("Error occured during unzipping - Reason: {}", e.getLocalizedMessage());
                throw new RuntimeException(e);
            }
        }

        // copy stream
        int bytesCopied = IOUtils.copy(inStream, destinationStream);

        logger.debug("decryption done. copied {} decrypted bytes to the outputstream", bytesCopied);

        inStream.close();
        destinationStream.close();
    } catch (IOException e) {
        logger.error("Decryption failed - Reason: {}", e.getLocalizedMessage());
        throw new RuntimeException(e);
    }
}

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From source file:org.zuinnote.hadoop.office.format.common.writer.msexcel.internal.EncryptedTempData.java

public InputStream getInputStream() throws FileNotFoundException {
    if (this.ciDecrypt != null) { // decrypt tempdata
        LOG.debug("Returning decrypted InputStream for " + this.tempFile.getAbsolutePath());
        LOG.debug("Size of temp file: " + this.tempFile.length());
        return new CipherInputStream(new FileInputStream(this.tempFile), this.ciDecrypt);
    }/* www .  j  av a2  s. c o  m*/
    return new FileInputStream(this.tempFile);
}

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From source file:org.jenkinsci.plugins.fabric8.support.hack.AnnotatedLargeText.java

private ConsoleAnnotator createAnnotator(StaplerRequest req) throws IOException {
    try {// ww  w  .  j av a 2s.  c om
        String e = req != null ? req.getHeader("X-ConsoleAnnotator") : null;
        if (e != null) {
            Cipher sym = PASSING_ANNOTATOR.decrypt();
            ObjectInputStreamEx ois = new ObjectInputStreamEx(
                    new GZIPInputStream(new CipherInputStream(
                            new ByteArrayInputStream(Base64.decode(e.toCharArray())), sym)),
                    Jenkins.getInstance().pluginManager.uberClassLoader);

            ConsoleAnnotator var7;
            try {
                long timestamp = ois.readLong();
                if (TimeUnit2.HOURS.toMillis(1L) <= Math.abs(System.currentTimeMillis() - timestamp)) {
                    return ConsoleAnnotator.initial(this.context == null ? null : this.context.getClass());
                }

                var7 = (ConsoleAnnotator) ois.readObject();
            } finally {
                ois.close();
            }

            return var7;
        }
    } catch (ClassNotFoundException var12) {
        throw new IOException(var12);
    }

    return ConsoleAnnotator.initial(this.context == null ? null : this.context.getClass());
}

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From source file:enc_mods.aes.java

/**
* Decrypts an AES key from a file using an RSA private key
*//*www . ja  v  a2 s .co m*/
public void loadKey(File in, File privateKeyFile) {
    try {
        // read private key to be used to decrypt the AES key
        byte[] encodedKey = new byte[(int) privateKeyFile.length()];
        new FileInputStream(privateKeyFile).read(encodedKey);

        // create private key
        PKCS8EncodedKeySpec privateKeySpec = new PKCS8EncodedKeySpec(encodedKey);
        KeyFactory kf = KeyFactory.getInstance("RSA");
        PrivateKey pk = kf.generatePrivate(privateKeySpec);

        // read AES key
        cipher.init(Cipher.DECRYPT_MODE, pk);
        key = new byte[AES_Key_Size / 8];
        CipherInputStream is = new CipherInputStream(new FileInputStream(in), cipher);
        is.read(key);
        secretkey = new SecretKeySpec(key, "AES");
    } catch (Exception e) {
        e.printStackTrace();
    }
}

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From source file:jatoo.properties.FileProperties.java

public synchronized FileProperties load() throws IOException {

    InputStream stream = null;//from   www  .j  a v a2 s  . c o  m

    try {

        stream = new FileInputStream(file);

        if (cipherDecrypt != null) {
            stream = new CipherInputStream(stream, cipherDecrypt);
        }

        load(stream);
    }

    catch (IOException e) {
        throw e;
    }

    finally {
        if (stream != null) {
            try {
                stream.close();
            } catch (IOException e) {
            }
        }
    }

    return this;
}

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From source file:org.codice.ddf.configuration.migration.AbstractMigrationSupport.java

public static String decrypt(byte[] data, Path keyPath)
        throws IOException, DecoderException, NoSuchPaddingException, NoSuchAlgorithmException,
        InvalidKeyException, InvalidAlgorithmParameterException {

    String keyData = new String(readFileToByteArray(keyPath.toFile()), StandardCharsets.UTF_8);
    byte[] keyBytes = decodeHex(keyData.toCharArray());
    SecretKey secretKey = new SecretKeySpec(keyBytes, MigrationZipConstants.KEY_ALGORITHM);
    Cipher cipher = Cipher.getInstance(MigrationZipConstants.CIPHER_ALGORITHM);
    IvParameterSpec iv = new IvParameterSpec(MigrationZipConstants.CIPHER_IV);
    cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);
    String decryptedContent;//from ww w .j av a2  s  .  com
    try (InputStream is = new CipherInputStream(ByteSource.wrap(data).openStream(), cipher)) {
        decryptedContent = IOUtils.toString(is, StandardCharsets.UTF_8);
    }
    return decryptedContent;
}

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From source file:org.pieShare.pieShareApp.service.fileService.fileEncryptionService.FileEncryptionService.java

@Override
public void decryptFile(File source, File target) {
    try {/*from w  w  w  .java2  s.co  m*/
        //CipherInputStream stream = new CipherInputStream(new FileInputStream(this.fileService.getAbsolutePath(file).toFile()), this.getCipher(Cipher.DECRYPT_MODE));
        FileInputStream fileStream = new FileInputStream(source);
        CipherInputStream stream = new CipherInputStream(fileStream, this.getCipher(Cipher.DECRYPT_MODE));
        //Base64InputStream base64Input = new Base64InputStream(fileStream);
        //FileOutputStream outputStream = new FileOutputStream(this.fileService.getAbsolutePath(workingFile).toFile());
        FileOutputStream outputStream = new FileOutputStream(target);
        this.rewriteFile(stream, outputStream);
    } catch (FileNotFoundException ex) {
        PieLogger.error(this.getClass(), "Error!", ex);
    } catch (IOException ex) {
        PieLogger.error(this.getClass(), "Error!", ex);
    } catch (InvalidKeyException ex) {
        PieLogger.error(this.getClass(), "Error!", ex);
    }
}

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From source file:org.alfresco.encryption.AbstractEncryptor.java

/**
 * {@inheritDoc}/*from  ww w .  ja  va2  s.  c o  m*/
 */
@Override
public InputStream decrypt(String keyAlias, AlgorithmParameters params, InputStream input) {
    Cipher cipher = getCipher(keyAlias, params, Cipher.DECRYPT_MODE);
    if (cipher == null) {
        return input;
    }

    try {
        return new CipherInputStream(input, cipher);
    } catch (Throwable e) {
        throw new AlfrescoRuntimeException("Decryption failed for key alias: " + keyAlias, e);
    }
}

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