Java 类org.bouncycastle.crypto.modes.OFBBlockCipher 实例源码

项目：ss-java 文件：AesCrypto.java

@Override
protected StreamCipher getCipher() {
    String method = getMethod();
    AESFastEngine engine = new AESFastEngine();

    switch (method) {
        case CIPHER_AES_128_CFB:
        case CIPHER_AES_192_CFB:
        case CIPHER_AES_256_CFB:
            return new CFBBlockCipher(engine, 128);
        case CIPHER_AES_128_CFB8:
        case CIPHER_AES_192_CFB8:
        case CIPHER_AES_256_CFB8:
            return new CFBBlockCipher(engine, 8);
        case CIPHER_AES_128_OFB:
        case CIPHER_AES_192_OFB:
        case CIPHER_AES_256_OFB:
            return new OFBBlockCipher(engine, 128);
        default:
            throw new IllegalArgumentException(method);
    }
}

项目：subshare 文件：AEADBlockCipherImpl.java

@Override
public int getIVSize()
{
    int ivSize = this.ivSize;
    if (ivSize < 0) {
        final BlockCipher underlyingCipher = delegate.getUnderlyingCipher();

        if (underlyingCipher instanceof CFBBlockCipher)
            ivSize = ((CFBBlockCipher)underlyingCipher).getUnderlyingCipher().getBlockSize();
        else if (underlyingCipher instanceof OFBBlockCipher)
            ivSize = ((OFBBlockCipher)underlyingCipher).getUnderlyingCipher().getBlockSize();
        else
            ivSize = underlyingCipher.getBlockSize();

        if (delegate instanceof CCMBlockCipher)
            --ivSize;

        this.ivSize = ivSize;
    }

    return ivSize;
}

项目：gwt-crypto 文件：AESTest.java

private void testNullOFB()
    throws InvalidCipherTextException
{
    BufferedBlockCipher b = new BufferedBlockCipher(new OFBBlockCipher(new AESEngine(), 128));
    KeyParameter kp = new KeyParameter(Hex.decode("5F060D3716B345C253F6749ABAC10917"));

    b.init(true, new ParametersWithIV(kp, new byte[16]));

    byte[] out = new byte[b.getOutputSize(tData.length)];

    int len = b.processBytes(tData, 0, tData.length, out, 0);

    len += b.doFinal(out, len);

    if (!areEqual(outOFB1, out))
    {
        fail("no match on first nullOFB check");
    }

    b.init(true, new ParametersWithIV(null, Hex.decode("000102030405060708090a0b0c0d0e0f")));

    len = b.processBytes(tData, 0, tData.length, out, 0);

    len += b.doFinal(out, len);

    if (!areEqual(outOFB2, out))
    {
        fail("no match on second nullOFB check");
    }
}

项目：gwt-crypto 文件：CipherStreamTest.java

private void testModes(BlockCipher cipher1, BlockCipher cipher2, int keySize)
    throws Exception
{
    final KeyParameter key = new KeyParameter(new byte[keySize]);
    final int blockSize = getBlockSize(cipher1);
    final CipherParameters withIv = new ParametersWithIV(key, new byte[blockSize]);

    if (blockSize > 1)
    {
        testMode(new PaddedBufferedBlockCipher(cipher1, new PKCS7Padding()), key);

        testMode(new PaddedBufferedBlockCipher(new CBCBlockCipher(cipher1), new PKCS7Padding()), withIv);

        testMode(new BufferedBlockCipher(new OFBBlockCipher(cipher1, blockSize)), withIv);
        testMode(new BufferedBlockCipher(new CFBBlockCipher(cipher1, blockSize)), withIv);
        testMode(new BufferedBlockCipher(new SICBlockCipher(cipher1)), withIv);
    }
    // CTS requires at least one block
    if (blockSize <= 16 && streamSize >= blockSize)
    {
        testMode(new CTSBlockCipher(cipher1), key);
    }
    if (blockSize <= 16 && streamSize >= blockSize)
    {
        testMode(new NISTCTSBlockCipher(NISTCTSBlockCipher.CS1, cipher1), key);
        testMode(new NISTCTSBlockCipher(NISTCTSBlockCipher.CS2, cipher1), key);
        testMode(new NISTCTSBlockCipher(NISTCTSBlockCipher.CS3, cipher1), key);
    }
    if (blockSize == 8 || blockSize == 16)
    {
        testMode(new EAXBlockCipher(cipher1), withIv);
    }
    if (blockSize == 16)
    {
        testMode(new CCMBlockCipher(cipher1), new ParametersWithIV(key, new byte[7]));
        testMode(new GCMBlockCipher(cipher1), withIv);
        testMode(new OCBBlockCipher(cipher1, cipher2), new ParametersWithIV(key, new byte[15]));
    }
}

项目：subshare 文件：BufferedBlockCipherImpl.java

@Override
public int getIVSize()
{
    if (ivSize < 0) {
        final String mode = CryptoRegistry.splitTransformation(getTransformation())[1];
        if ("".equals(mode) || "ECB".equals(mode))
            ivSize = 0; // No block cipher mode (i.e. ECB) => no IV.
        else {
            if (delegate instanceof CTSBlockCipher) {
                final CTSBlockCipher cts = (CTSBlockCipher) delegate;
                if (cts.getUnderlyingCipher() instanceof CBCBlockCipher)
                    ivSize = cts.getUnderlyingCipher().getBlockSize();
                else
                    ivSize = 0;
            }
            else {
                final BlockCipher underlyingCipher = delegate.getUnderlyingCipher();

                if (underlyingCipher instanceof CFBBlockCipher)
                    ivSize = ((CFBBlockCipher)underlyingCipher).getUnderlyingCipher().getBlockSize();
                else if (underlyingCipher instanceof OFBBlockCipher)
                    ivSize = ((OFBBlockCipher)underlyingCipher).getUnderlyingCipher().getBlockSize();
                else
                    ivSize = underlyingCipher.getBlockSize();
            }
        }
    }
    return ivSize;
}

项目：irma_future_id 文件：AESTest.java

private void testNullOFB()
    throws InvalidCipherTextException
{
    BufferedBlockCipher b = new BufferedBlockCipher(new OFBBlockCipher(new AESEngine(), 128));
    KeyParameter kp = new KeyParameter(Hex.decode("5F060D3716B345C253F6749ABAC10917"));

    b.init(true, new ParametersWithIV(kp, new byte[16]));

    byte[] out = new byte[b.getOutputSize(tData.length)];

    int len = b.processBytes(tData, 0, tData.length, out, 0);

    len += b.doFinal(out, len);

    if (!areEqual(outOFB1, out))
    {
        fail("no match on first nullOFB check");
    }

    b.init(true, new ParametersWithIV(null, Hex.decode("000102030405060708090a0b0c0d0e0f")));

    len = b.processBytes(tData, 0, tData.length, out, 0);

    len += b.doFinal(out, len);

    if (!areEqual(outOFB2, out))
    {
        fail("no match on second nullOFB check");
    }
}

项目：bc-java 文件：AESTest.java

private void testNullOFB()
    throws InvalidCipherTextException
{
    BufferedBlockCipher b = new BufferedBlockCipher(new OFBBlockCipher(new AESEngine(), 128));
    KeyParameter kp = new KeyParameter(Hex.decode("5F060D3716B345C253F6749ABAC10917"));

    b.init(true, new ParametersWithIV(kp, new byte[16]));

    byte[] out = new byte[b.getOutputSize(tData.length)];

    int len = b.processBytes(tData, 0, tData.length, out, 0);

    len += b.doFinal(out, len);

    if (!areEqual(outOFB1, out))
    {
        fail("no match on first nullOFB check");
    }

    b.init(true, new ParametersWithIV(null, Hex.decode("000102030405060708090a0b0c0d0e0f")));

    len = b.processBytes(tData, 0, tData.length, out, 0);

    len += b.doFinal(out, len);

    if (!areEqual(outOFB2, out))
    {
        fail("no match on second nullOFB check");
    }
}

项目：keepass2android 文件：JCEStreamCipher.java

public Twofish_OFB8()
{
    super(new OFBBlockCipher(new TwofishEngine(), 8), 128);
}