Example usage for org.bouncycastle.crypto.modes CBCBlockCipher CBCBlockCipher

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.modes CBCBlockCipher CBCBlockCipher.

Prototype

public CBCBlockCipher(BlockCipher cipher)

Source Link

Document

Basic constructor.

Usage

From source file:org.sperle.keepass.crypto.bc.AESCipher.java

License:Open Source License

public byte[] encrypt(byte[] key, byte[] plainText, byte[] iv, int rounds, boolean padding, ProgressMonitor pm)
        throws KeePassCryptoException {
    try {/*from w w w .  ja v a 2 s .c  om*/
        BufferedBlockCipher cipher = null;
        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));

        if (pm != null) {
            if (rounds == 1)
                pm.nextStep(plainText.length / cipher.getBlockSize(), "pm_encrypt"); // count length (database)
            else if (rounds > 1)
                pm.nextStep(rounds, "pm_encrypt"); // count rounds (master password)
        }

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

        int outLength = cipher.processBytes(plainText, 0, plainText.length, cipherText, 0,
                rounds == 1 ? pm : null);
        if (outLength == -1)
            return null; // user canceled
        if (rounds > 1) {
            if (pm != null)
                pm.tick();
            for (int i = 1; i < rounds; i++) {
                outLength = cipher.processBytes(cipherText, 0, cipherText.length, cipherText, 0, null);
                if (pm != null) {
                    if (pm.isCanceled())
                        return null;
                    pm.tick();
                }
            }
        }

        if (padding)
            cipher.doFinal(cipherText, outLength);
        return cipherText;
    } catch (Exception e) {
        throw new KeePassCryptoException("Exception during AES encryption: " + e.getMessage());
    }
}

From source file:org.sperle.keepass.crypto.bc.AESCipher.java

License:Open Source License

public byte[] decrypt(byte[] key, byte[] cipherText, byte[] iv, ProgressMonitor pm)
        throws KeePassCryptoException {
    try {/*from www.  j  a v  a2  s. c o  m*/
        BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()));
        if (iv != null)
            cipher.init(false, new ParametersWithIV(new KeyParameter(key), iv));
        else
            cipher.init(false, new KeyParameter(key));
        if (pm != null)
            pm.nextStep(cipherText.length / cipher.getBlockSize(), "pm_decrypt");
        byte[] plainText = new byte[cipher.getOutputSize(cipherText.length)];
        int outLength = cipher.processBytes(cipherText, 0, cipherText.length, plainText, 0, pm);
        if (outLength == -1)
            return null; // user canceled
        outLength += cipher.doFinal(plainText, outLength);
        return (outLength < plainText.length) ? ByteArrays.cut(plainText, outLength) : plainText;
    } catch (Exception e) {
        throw new KeePassCryptoException("Exception during AES decryption: " + e.getMessage());
    }
}

From source file:org.springframework.security.crypto.encrypt.BouncyCastleAesCbcBytesEncryptor.java

License:Apache License

@Override
public byte[] encrypt(byte[] bytes) {
    byte[] iv = this.ivGenerator.generateKey();

    PaddedBufferedBlockCipher blockCipher = new PaddedBufferedBlockCipher(
            new CBCBlockCipher(new AESFastEngine()), new PKCS7Padding());
    blockCipher.init(true, new ParametersWithIV(secretKey, iv));
    byte[] encrypted = process(blockCipher, bytes);
    return iv != null ? concatenate(iv, encrypted) : encrypted;
}

From source file:org.springframework.security.crypto.encrypt.BouncyCastleAesCbcBytesEncryptor.java

License:Apache License

@Override
public byte[] decrypt(byte[] encryptedBytes) {
    byte[] iv = subArray(encryptedBytes, 0, this.ivGenerator.getKeyLength());
    encryptedBytes = subArray(encryptedBytes, this.ivGenerator.getKeyLength(), encryptedBytes.length);

    PaddedBufferedBlockCipher blockCipher = new PaddedBufferedBlockCipher(
            new CBCBlockCipher(new AESFastEngine()), new PKCS7Padding());
    blockCipher.init(false, new ParametersWithIV(secretKey, iv));
    return process(blockCipher, encryptedBytes);
}

From source file:org.tramaci.onionmail.Stdio.java

License:Open Source License

public static byte[] AESEnc2m(byte[][] key, byte[][] iv, byte[] data) throws Exception {

    byte[][] blo = Stdio.DivBlock(data, 16, false);
    int cx = blo.length;
    int kc = key.length;
    for (int kx = 0; kx < kc; kx++) {
        CBCBlockCipher aes = new CBCBlockCipher(new AESEngine());
        CipherParameters ivAndKey = new ParametersWithIV(new KeyParameter(key[kx]), iv[kx]);
        aes.init(true, ivAndKey);//from  ww w .jav a 2s . c  o m
        for (int ax = 0; ax < cx; ax++)
            aes.processBlock(blo[ax], 0, blo[ax], 0);
    }

    data = Stdio.MulBlock(blo, 16);
    blo = null;
    return data;
}

From source file:org.tramaci.onionmail.Stdio.java

License:Open Source License

public static byte[] AESDec2m(byte[][] key, byte[][] iv, byte[] data) throws Exception {

    byte[][] blo = Stdio.DivBlock(data, 16, false);
    int cx = blo.length;
    int kc = key.length - 1;
    for (int kx = kc; kx > -1; kx--) {
        CBCBlockCipher aes = new CBCBlockCipher(new AESEngine());
        CipherParameters ivAndKey = new ParametersWithIV(new KeyParameter(key[kx]), iv[kx]);
        aes.init(false, ivAndKey);/*from   ww  w. jav a  2  s.c  o  m*/
        for (int ax = 0; ax < cx; ax++)
            aes.processBlock(blo[ax], 0, blo[ax], 0);
    }

    data = Stdio.MulBlock(blo, 16);
    blo = null;
    return data;
}

From source file:org.tramaci.onionmail.Stdio.java

License:Open Source License

public static byte[] AESEnc2(byte[] key, byte[] iv, byte[] data) throws Exception {
    byte[][] blo = Stdio.DivBlock(data, 16, false);

    CBCBlockCipher aes = new CBCBlockCipher(new AESEngine());
    CipherParameters ivAndKey = new ParametersWithIV(new KeyParameter(key), iv);
    aes.init(true, ivAndKey);/*from  www  .  j ava 2  s  .  c  o m*/

    int cx = blo.length;
    for (int ax = 0; ax < cx; ax++)
        aes.processBlock(blo[ax], 0, blo[ax], 0);
    data = Stdio.MulBlock(blo, 16);
    blo = null;
    return data;
}

From source file:org.tramaci.onionmail.Stdio.java

License:Open Source License

public static byte[] AESDec2(byte[] key, byte[] iv, byte[] data) throws Exception {
    byte[][] blo = Stdio.DivBlock(data, 16, false);

    CBCBlockCipher aes = new CBCBlockCipher(new AESEngine());
    CipherParameters ivAndKey = new ParametersWithIV(new KeyParameter(key), iv);
    aes.init(false, ivAndKey);//www. j  ava 2 s. c  o m

    int cx = blo.length;
    for (int ax = 0; ax < cx; ax++)
        aes.processBlock(blo[ax], 0, blo[ax], 0);
    data = Stdio.MulBlock(blo, 16);
    blo = null;
    return data;
}

From source file:org.tramaci.onionmail.Stdio.java

License:Open Source License

public static byte[] AES2Enc(byte[] key, byte[] iv, byte[] data) throws Exception {
    PaddedBufferedBlockCipher aes = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()));
    CipherParameters ivAndKey = new ParametersWithIV(new KeyParameter(key), iv);
    aes.init(true, ivAndKey);// www .  j  a  v  a 2 s.  co m
    return AES2cipher(aes, data);
}

From source file:org.tramaci.onionmail.Stdio.java

License:Open Source License

public static byte[] AES2Dec(byte[] key, byte[] iv, byte[] data) throws Exception {
    try {/*from w w w  .  jav a2s.  co m*/
        PaddedBufferedBlockCipher aes = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()));
        CipherParameters ivAndKey = new ParametersWithIV(new KeyParameter(key), iv);
        aes.init(false, ivAndKey);
        return AES2cipher(aes, data);
    } catch (Exception E) {
        throw new Exception("!Invalid KEY for data" + E.getMessage());
    }
}