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)

Source Link

Document

Create a buffered block cipher PKCS7 padding

Usage

From source file:org.xwiki.crypto.passwd.internal.AESPasswordCiphertext.java

License:Open Source License

/**
 * {@inheritDoc}/*from ww  w  .  j  av a  2 s  .c om*/
 *
 * @see org.xwiki.crypto.passwd.internal.CAST5PasswordCiphertext#newCipherInstance()
 */
@Override
protected PaddedBufferedBlockCipher newCipherInstance() {
    return new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()));
}

From source file:org.xwiki.crypto.passwd.internal.CAST5PasswordCiphertext.java

License:Open Source License

/**
 * {@inheritDoc}/*from   ww w .j  a v a  2s. c  o m*/
 *
 * @see org.xwiki.crypto.passwd.internal.AbstractPasswordCiphertext#newCipherInstance()
 */
@Override
protected PaddedBufferedBlockCipher newCipherInstance() {
    return new PaddedBufferedBlockCipher(new CBCBlockCipher(new CAST5Engine()));
}

From source file:pl.sind.keepass.crypto.BcAESCipher.java

License:Apache License

public byte[] decrypt(byte[] key, byte[] data, byte[] iv) throws CipherException {
    BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()));

    if (iv != null) {
        cipher.init(false, new ParametersWithIV(new KeyParameter(key), iv));
    } else {//from w  ww .  j a va  2 s .  c o  m
        cipher.init(false, new KeyParameter(key));
    }

    byte[] decoded = new byte[cipher.getOutputSize(data.length)];

    int out = cipher.processBytes(data, 0, data.length, decoded, 0);
    try {
        out += cipher.doFinal(decoded, out);

        if (out < decoded.length) {
            decoded = Arrays.copyOf(decoded, out);
        }

    } catch (DataLengthException e) {
        // we are padding so shouldn happen
        throw new CipherException("Invalid data lenght", e);
    } catch (IllegalStateException e) {
        throw new CipherException("Decrypting error", e);
    } catch (InvalidCipherTextException e) {
        throw new CipherException("Unable to decrypt data", e);
    }

    return decoded;

}

From source file:pl.sind.keepass.crypto.BcAESCipher.java

License:Apache License

public byte[] encrypt(byte[] key, byte[] data, byte[] iv, int rounds, boolean padding) throws CipherException {
    BufferedBlockCipher cipher = null;/*from   w  w w  . j  av  a  2s  .c  o m*/

    if (padding) {
        cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()));
    } else {
        cipher = new BufferedBlockCipher(new AESEngine());
    }

    if (iv != null) {
        cipher.init(true, new ParametersWithIV(new KeyParameter(key), iv));
    } else {
        cipher.init(true, new KeyParameter(key));
    }

    byte[] encoded = null;
    if (padding) {
        encoded = new byte[cipher.getOutputSize(data.length)];
    } else {
        encoded = new byte[data.length];
    }

    int out = cipher.processBytes(data, 0, data.length, encoded, 0);
    if (rounds > 1) {
        for (int i = 1; i < rounds; i++) {
            out = cipher.processBytes(encoded, 0, encoded.length, encoded, 0);
        }
    }

    try {
        if (padding && out < encoded.length)
            cipher.doFinal(encoded, out);
    } catch (DataLengthException e) {
        // we are padding so shouldn happen
        throw new CipherException("Invalid data lenght", e);
    } catch (IllegalStateException e) {
        throw new CipherException("Decrypting error", e);
    } catch (InvalidCipherTextException e) {
        throw new CipherException("Unable to decrypt data", e);
    }

    return encoded;
}