Example usage for org.bouncycastle.crypto.params KDFParameters KDFParameters

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.params KDFParameters KDFParameters.

Prototype

public KDFParameters(byte[] shared, byte[] iv) 

Source Link

Usage

From source file:edu.biu.scapi.primitives.kdf.bc.BcKdfISO18033.java

License:Open Source License

/**
 * Generates the bc related parameters of type DerivationParameters
 * @param shared the input key /* ww  w.  j  av  a 2 s .c  o m*/
 * @param iv
 */
private DerivationParameters generateParameters(byte[] shared, byte[] iv) {

    if (iv == null) {//iv is not provided

        return new ISO18033KDFParameters(shared);
    } else { //iv is provided. Passes to the KDFParameters
        return new KDFParameters(shared, iv);
    }

}

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From source file:org.ethereum.crypto.ECIESTest.java

License:Open Source License

@Test
public void testKDF() {
    ConcatKDFBytesGenerator kdf = new ConcatKDFBytesGenerator(new SHA256Digest());
    kdf.init(new KDFParameters("Hello".getBytes(), new byte[0]));
    byte[] bytes = new byte[2];
    kdf.generateBytes(bytes, 0, bytes.length);
    assertArrayEquals(new byte[] { -66, -89 }, bytes);
}

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From source file:org.ethereum.crypto.EthereumIESEngine.java

License:Open Source License

public byte[] processBlock(byte[] in, int inOff, int inLen, byte[] macData) throws InvalidCipherTextException {
    if (forEncryption) {
        if (keyPairGenerator != null) {
            EphemeralKeyPair ephKeyPair = keyPairGenerator.generate();

            this.privParam = ephKeyPair.getKeyPair().getPrivate();
            this.v = ephKeyPair.getEncodedPublicKey();
        }/*  www. j a va2s . c o m*/
    } else {
        if (keyParser != null) {
            ByteArrayInputStream bIn = new ByteArrayInputStream(in, inOff, inLen);

            try {
                this.pubParam = keyParser.readKey(bIn);
            } catch (IOException e) {
                throw new InvalidCipherTextException(
                        "unable to recover ephemeral public key: " + e.getMessage(), e);
            }

            int encLength = (inLen - bIn.available());
            this.v = Arrays.copyOfRange(in, inOff, inOff + encLength);
        }
    }

    // Compute the common value and convert to byte array.
    agree.init(privParam);
    BigInteger z = agree.calculateAgreement(pubParam);
    byte[] Z = BigIntegers.asUnsignedByteArray(agree.getFieldSize(), z);

    // Create input to KDF.
    byte[] vz;
    //        if (v.length != 0)
    //        {
    //            VZ = new byte[v.length + Z.length];
    //            System.arraycopy(v, 0, VZ, 0, v.length);
    //            System.arraycopy(Z, 0, VZ, v.length, Z.length);
    //        }
    //        else
    {
        vz = Z;
    }

    // Initialise the KDF.
    DerivationParameters kdfParam;
    if (kdf instanceof MGF1BytesGeneratorExt) {
        kdfParam = new MGFParameters(vz);
    } else {
        kdfParam = new KDFParameters(vz, param.getDerivationV());
    }
    kdf.init(kdfParam);

    return forEncryption ? encryptBlock(in, inOff, inLen, macData) : decryptBlock(in, inOff, inLen, macData);
}

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