Example usage for org.bouncycastle.crypto.paddings PaddedBufferedBlockCipher PaddedBufferedBlockCipher

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.paddings PaddedBufferedBlockCipher PaddedBufferedBlockCipher.

Prototype

public PaddedBufferedBlockCipher(BlockCipher cipher, BlockCipherPadding padding)

Source Link

Document

Create a buffered block cipher with the desired padding.

Usage

From source file:ch.dissem.bitmessage.cryptography.bc.BouncyCryptography.java

License:Apache License

@Override
public byte[] crypt(boolean encrypt, byte[] data, byte[] key_e, byte[] initializationVector) {
    BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()),
            new PKCS7Padding());
    CipherParameters params = new ParametersWithIV(new KeyParameter(key_e), initializationVector);

    cipher.init(encrypt, params);//w  w w.jav  a  2s. co  m

    byte[] buffer = new byte[cipher.getOutputSize(data.length)];
    int length = cipher.processBytes(data, 0, data.length, buffer, 0);
    try {
        length += cipher.doFinal(buffer, length);
    } catch (InvalidCipherTextException e) {
        throw new IllegalArgumentException(e);
    }
    if (length < buffer.length) {
        return Arrays.copyOfRange(buffer, 0, length);
    }
    return buffer;
}

From source file:co.lqnt.lockbox.Cipher.java

License:Open Source License

/**
 * Construct a new bi-directional cipher.
 *///  ww  w  .  ja v a  2s . c o  m
public Cipher() {
    CodecInterface base64UriCodec = new Base64UriCodec();
    AsymmetricBlockCipher rsaCipher = new OAEPEncoding(new RSAEngine(), new SHA1Digest());
    BufferedBlockCipher aesCipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()),
            new PKCS7Padding());
    Digest sha1Digest = new SHA1Digest();
    SecureRandom random = new SecureRandom();

    this.encryptionCipher = new EncryptionCipher(base64UriCodec, rsaCipher, aesCipher, sha1Digest, random);
    this.decryptionCipher = new DecryptionCipher(base64UriCodec, rsaCipher, aesCipher, sha1Digest);
}

From source file:co.lqnt.lockbox.DecryptionCipher.java

License:Open Source License

/**
 * Construct a new decryption cipher.//ww  w  . ja va2  s.c  o  m
 */
public DecryptionCipher() {
    this.base64UriCodec = new Base64UriCodec();
    this.rsaCipher = new OAEPEncoding(new RSAEngine(), new SHA1Digest());
    this.aesCipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()), new PKCS7Padding());
    this.sha1Digest = new SHA1Digest();
    this.asciiCharset = Charset.forName("US-ASCII");
}

From source file:co.lqnt.lockbox.EncryptionCipher.java

License:Open Source License

/**
 * Construct a new encryption cipher.//www  . java 2  s .  c  om
 */
public EncryptionCipher() {
    this.base64UriCodec = new Base64UriCodec();
    this.rsaCipher = new OAEPEncoding(new RSAEngine(), new SHA1Digest());
    this.aesCipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()), new PKCS7Padding());
    this.sha1Digest = new SHA1Digest();
    this.random = new SecureRandom();
    this.asciiCharset = Charset.forName("US-ASCII");
}

From source file:com.android.isoma.enc.Encryption.java

License:Open Source License

public synchronized byte[] encrypt(byte[] data)
        throws DataLengthException, IllegalStateException, InvalidCipherTextException {
    byte[] iv = null;
    if (data == null || data.length == 0) {
        return new byte[0];
    }/*  ww  w .  jav  a 2 s  . c  o m*/
    BufferedBlockCipher encryptcipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()),
            new ZeroBytePadding());

    String source = "00000000";
    iv = source.getBytes();

    CipherParameters ivAndKey = new ParametersWithIV(key, iv);
    encryptcipher.init(true, ivAndKey);

    return callCipher(encryptcipher, data);
}

From source file:com.android.isoma.enc.Encryption.java

License:Open Source License

public synchronized byte[] decrypt(byte[] data)
        throws DataLengthException, IllegalStateException, InvalidCipherTextException {
    byte[] iv = null;
    if (data == null || data.length == 0) {
        return new byte[0];
    }/*from   w w w .  j  ava 2 s. co m*/

    BufferedBlockCipher decryptcipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()),
            new ZeroBytePadding());

    String source = "00000000";
    iv = source.getBytes();

    CipherParameters ivAndKey = new ParametersWithIV(key, iv);

    decryptcipher.init(false, ivAndKey);

    return callCipher(decryptcipher, data);
}

From source file:com.github.flbaue.jcrypttool.v1.DecryptionRunnable.java

License:Apache License

@Override
public void run() {
    PaddedBufferedBlockCipher cipher;//from  w  w  w.  ja v  a 2  s .c om
    byte[] key;
    byte[] iv;
    byte[] salt;

    try (InputStream fileInputStream = new BufferedInputStream(
            new FileInputStream(encryptionSettings.inputFile))) {

        cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()), new PKCS7Padding());
        salt = extractSalt(fileInputStream);
        iv = extractIV(fileInputStream);
        key = generateKey(encryptionSettings.password, salt);
        KeyParameter keyParam = new KeyParameter(key);
        CipherParameters params = new ParametersWithIV(keyParam, iv);
        cipher.init(false, params);

        /*
        System.out.println(getClass().getName() + " salt:\t" + Base64.toBase64String(salt) + " (" + salt.length + " byte)");
        System.out.println(getClass().getName() + " key:\t" + Base64.toBase64String(key) + " (" + key.length + " byte)");
        System.out.println(getClass().getName() + " iv:\t\t" + Base64.toBase64String(iv) + " (" + iv.length + " byte)");
        */

        InputStream in = null;
        OutputStream out = null;
        try {
            in = new GZIPInputStream(new CipherInputStream(fileInputStream, cipher));
            out = new BufferedOutputStream(new FileOutputStream(encryptionSettings.outputFile));
            processStreams(in, out);
        } catch (IOException e) {
            throw new RuntimeException(e);
        } finally {
            closeStream(in);
            closeStream(out);
        }
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}

From source file:com.github.flbaue.jcrypttool.v1.EncryptionRunnable.java

License:Apache License

@Override
public void run() {
    progress.start();//from ww w. ja  va 2s .  com

    final byte[] salt = generateSalt();
    final byte[] key = generateKey(encryptionSettings.password, salt);
    final byte[] iv;
    final PaddedBufferedBlockCipher cipher;

    try (OutputStream fileOutputStream = new BufferedOutputStream(
            new FileOutputStream(encryptionSettings.outputFile))) {

        cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()), new PKCS7Padding());
        iv = generateIV();
        final KeyParameter keyParam = new KeyParameter(key);
        final CipherParameters params = new ParametersWithIV(keyParam, iv);
        cipher.init(true, params);

        /*
        System.out.println(getClass().getName() + " salt:\t" + Base64.toBase64String(salt) + " (" + salt.length + " byte)");
        System.out.println(getClass().getName() + " key:\t" + Base64.toBase64String(key) + " (" + key.length + " byte)");
        System.out.println(getClass().getName() + " iv:\t\t" + Base64.toBase64String(iv) + " (" + iv.length + " byte)");
        */

        InputStream in = null;
        OutputStream out = null;
        try {
            writeInitBlock(fileOutputStream, salt, iv);
            in = new BufferedInputStream(new FileInputStream(encryptionSettings.inputFile));
            out = new GZIPOutputStream(new CipherOutputStream(fileOutputStream, cipher));
            processStreams(in, out);
        } catch (IOException e) {
            throw new RuntimeException(e);
        } finally {
            closeStream(in);
            closeStream(out);
        }
    } catch (IOException e) {
        throw new RuntimeException(e);
    }

    progress.setFinished();
}

From source file:com.github.flbaue.jcrypttool.v2.domain.AesEncryptionService.java

License:Apache License

@Override
public OutputStream encryptedOutputStream(final Path path, final String password)
        throws IOException, EncryptionFailedException {
    try {/* ww w.  j a v a 2s. c  o  m*/
        final byte[] salt = generateSalt();
        final byte[] key = generateKey(password, salt);
        final byte[] iv = generateIV();
        final byte[] fileInitBlock = generateOutputInitBlock(salt, iv);

        final PaddedBufferedBlockCipher cipher = new PaddedBufferedBlockCipher(
                new CBCBlockCipher(new AESEngine()), new PKCS7Padding());

        final KeyParameter keyParam = new KeyParameter(key);
        final CipherParameters params = new ParametersWithIV(keyParam, iv);
        cipher.init(true, params);

        final BufferedOutputStream out = new BufferedOutputStream(Files.newOutputStream(path));
        out.write(fileInitBlock);

        return new CipherOutputStream(out, cipher);
    } catch (InvalidKeySpecException | NoSuchAlgorithmException e) {
        throw new EncryptionFailedException(e);
    }
}

From source file:com.github.flbaue.jcrypttool.v2.domain.AesEncryptionService.java

License:Apache License

@Override
public String encryptString(final String string, final String password) throws EncryptionFailedException {
    try {//from  w  w  w. java2s.  co  m
        final byte[] salt = generateSalt();
        final byte[] key = generateKey(password, salt);
        final byte[] iv = generateIV();
        final byte[] outputInitBlock = generateOutputInitBlock(salt, iv);

        final PaddedBufferedBlockCipher cipher = new PaddedBufferedBlockCipher(
                new CBCBlockCipher(new AESEngine()), new PKCS7Padding());

        final KeyParameter keyParam = new KeyParameter(key);
        final CipherParameters params = new ParametersWithIV(keyParam, iv);
        cipher.init(true, params);

        final byte in[] = string.getBytes();
        final byte out[] = new byte[cipher.getOutputSize(in.length)];
        final int len1 = cipher.processBytes(in, 0, in.length, out, 0);

        cipher.doFinal(out, len1);

        final byte[] result = Arrays.concatenate(outputInitBlock, out);

        return Base64.toBase64String(result);
    } catch (InvalidKeySpecException | NoSuchAlgorithmException | InvalidCipherTextException e) {
        throw new EncryptionFailedException(e);
    }
}