Examples with KeyParameter com.github.zhenwei.core.crypto.params.KeyParameter used on opensource projects

Example 71 with KeyParameter

use of com.github.zhenwei.core.crypto.params.KeyParameter in project LinLong-Java by zhenwei1108.

the class HC128Engine method init.

/**
 * Initialise a HC-128 cipher.
 *
 * @param forEncryption whether or not we are for encryption. Irrelevant, as encryption and
 *                      decryption are the same.
 * @param params        the parameters required to set up the cipher.
 * @throws IllegalArgumentException if the params argument is inappropriate (ie. the key is not
 *                                  128 bit long).
 */
public void init(boolean forEncryption, CipherParameters params) throws IllegalArgumentException {
    CipherParameters keyParam = params;
    if (params instanceof ParametersWithIV) {
        iv = ((ParametersWithIV) params).getIV();
        keyParam = ((ParametersWithIV) params).getParameters();
    } else {
        iv = new byte[0];
    }
    if (keyParam instanceof KeyParameter) {
        key = ((KeyParameter) keyParam).getKey();
        init();
    } else {
        throw new IllegalArgumentException("Invalid parameter passed to HC128 init - " + params.getClass().getName());
    }
    initialised = true;
}

Example 72 with KeyParameter

use of com.github.zhenwei.core.crypto.params.KeyParameter in project LinLong-Java by zhenwei1108.

the class HC256Engine method init.

/**
 * Initialise a HC-256 cipher.
 *
 * @param forEncryption whether or not we are for encryption. Irrelevant, as encryption and
 *                      decryption are the same.
 * @param params        the parameters required to set up the cipher.
 * @throws IllegalArgumentException if the params argument is inappropriate (ie. the key is not
 *                                  256 bit long).
 */
public void init(boolean forEncryption, CipherParameters params) throws IllegalArgumentException {
    CipherParameters keyParam = params;
    if (params instanceof ParametersWithIV) {
        iv = ((ParametersWithIV) params).getIV();
        keyParam = ((ParametersWithIV) params).getParameters();
    } else {
        iv = new byte[0];
    }
    if (keyParam instanceof KeyParameter) {
        key = ((KeyParameter) keyParam).getKey();
        init();
    } else {
        throw new IllegalArgumentException("Invalid parameter passed to HC256 init - " + params.getClass().getName());
    }
    initialised = true;
}

Example 73 with KeyParameter

use of com.github.zhenwei.core.crypto.params.KeyParameter in project LinLong-Java by zhenwei1108.

the class IESEngine method decryptBlock.

private byte[] decryptBlock(byte[] in_enc, int inOff, int inLen) throws InvalidCipherTextException {
    byte[] M, K, K1, K2;
    int len = 0;
    // Ensure that the length of the input is greater than the MAC in bytes
    if (inLen < V.length + mac.getMacSize()) {
        throw new InvalidCipherTextException("Length of input must be greater than the MAC and V combined");
    }
    // note order is important: set up keys, do simple encryptions, check mac, do final encryption.
    if (cipher == null) {
        // Streaming mode.
        K1 = new byte[inLen - V.length - mac.getMacSize()];
        K2 = new byte[param.getMacKeySize() / 8];
        K = new byte[K1.length + K2.length];
        kdf.generateBytes(K, 0, K.length);
        if (V.length != 0) {
            System.arraycopy(K, 0, K2, 0, K2.length);
            System.arraycopy(K, K2.length, K1, 0, K1.length);
        } else {
            System.arraycopy(K, 0, K1, 0, K1.length);
            System.arraycopy(K, K1.length, K2, 0, K2.length);
        }
        // process the message
        M = new byte[K1.length];
        for (int i = 0; i != K1.length; i++) {
            M[i] = (byte) (in_enc[inOff + V.length + i] ^ K1[i]);
        }
    } else {
        // Block cipher mode.
        K1 = new byte[((IESWithCipherParameters) param).getCipherKeySize() / 8];
        K2 = new byte[param.getMacKeySize() / 8];
        K = new byte[K1.length + K2.length];
        kdf.generateBytes(K, 0, K.length);
        System.arraycopy(K, 0, K1, 0, K1.length);
        System.arraycopy(K, K1.length, K2, 0, K2.length);
        CipherParameters cp = new KeyParameter(K1);
        // If IV provide use it to initialize the cipher
        if (IV != null) {
            cp = new ParametersWithIV(cp, IV);
        }
        cipher.init(false, cp);
        M = new byte[cipher.getOutputSize(inLen - V.length - mac.getMacSize())];
        // do initial processing
        len = cipher.processBytes(in_enc, inOff + V.length, inLen - V.length - mac.getMacSize(), M, 0);
    }
    // Convert the length of the encoding vector into a byte array.
    byte[] P2 = param.getEncodingV();
    byte[] L2 = null;
    if (V.length != 0) {
        L2 = getLengthTag(P2);
    }
    // Verify the MAC.
    int end = inOff + inLen;
    byte[] T1 = Arrays.copyOfRange(in_enc, end - mac.getMacSize(), end);
    byte[] T2 = new byte[T1.length];
    mac.init(new KeyParameter(K2));
    mac.update(in_enc, inOff + V.length, inLen - V.length - T2.length);
    if (P2 != null) {
        mac.update(P2, 0, P2.length);
    }
    if (V.length != 0) {
        mac.update(L2, 0, L2.length);
    }
    mac.doFinal(T2, 0);
    if (!Arrays.constantTimeAreEqual(T1, T2)) {
        throw new InvalidCipherTextException("invalid MAC");
    }
    if (cipher == null) {
        return M;
    } else {
        len += cipher.doFinal(M, len);
        return Arrays.copyOfRange(M, 0, len);
    }
}

Example 74 with KeyParameter

use of com.github.zhenwei.core.crypto.params.KeyParameter in project LinLong-Java by zhenwei1108.

the class IESEngine method encryptBlock.

private byte[] encryptBlock(byte[] in, int inOff, int inLen) throws InvalidCipherTextException {
    byte[] C = null, K = null, K1 = null, K2 = null;
    int len;
    if (cipher == null) {
        // Streaming mode.
        K1 = new byte[inLen];
        K2 = new byte[param.getMacKeySize() / 8];
        K = new byte[K1.length + K2.length];
        kdf.generateBytes(K, 0, K.length);
        if (V.length != 0) {
            System.arraycopy(K, 0, K2, 0, K2.length);
            System.arraycopy(K, K2.length, K1, 0, K1.length);
        } else {
            System.arraycopy(K, 0, K1, 0, K1.length);
            System.arraycopy(K, inLen, K2, 0, K2.length);
        }
        C = new byte[inLen];
        for (int i = 0; i != inLen; i++) {
            C[i] = (byte) (in[inOff + i] ^ K1[i]);
        }
        len = inLen;
    } else {
        // Block cipher mode.
        K1 = new byte[((IESWithCipherParameters) param).getCipherKeySize() / 8];
        K2 = new byte[param.getMacKeySize() / 8];
        K = new byte[K1.length + K2.length];
        kdf.generateBytes(K, 0, K.length);
        System.arraycopy(K, 0, K1, 0, K1.length);
        System.arraycopy(K, K1.length, K2, 0, K2.length);
        // If iv provided use it to initialise the cipher
        if (IV != null) {
            cipher.init(true, new ParametersWithIV(new KeyParameter(K1), IV));
        } else {
            cipher.init(true, new KeyParameter(K1));
        }
        C = new byte[cipher.getOutputSize(inLen)];
        len = cipher.processBytes(in, inOff, inLen, C, 0);
        len += cipher.doFinal(C, len);
    }
    // Convert the length of the encoding vector into a byte array.
    byte[] P2 = param.getEncodingV();
    byte[] L2 = null;
    if (V.length != 0) {
        L2 = getLengthTag(P2);
    }
    // Apply the MAC.
    byte[] T = new byte[mac.getMacSize()];
    mac.init(new KeyParameter(K2));
    mac.update(C, 0, C.length);
    if (P2 != null) {
        mac.update(P2, 0, P2.length);
    }
    if (V.length != 0) {
        mac.update(L2, 0, L2.length);
    }
    mac.doFinal(T, 0);
    // Output the triple (V,C,T).
    byte[] Output = new byte[V.length + len + T.length];
    System.arraycopy(V, 0, Output, 0, V.length);
    System.arraycopy(C, 0, Output, V.length, len);
    System.arraycopy(T, 0, Output, V.length + len, T.length);
    return Output;
}

Example 75 with KeyParameter

use of com.github.zhenwei.core.crypto.params.KeyParameter in project LinLong-Java by zhenwei1108.

the class ISAACEngine method init.

/**
 * initialise an ISAAC cipher.
 *
 * @param forEncryption whether or not we are for encryption.
 * @param params        the parameters required to set up the cipher.
 * @throws IllegalArgumentException if the params argument is inappropriate.
 */
public void init(boolean forEncryption, CipherParameters params) {
    if (!(params instanceof KeyParameter)) {
        throw new IllegalArgumentException("invalid parameter passed to ISAAC init - " + params.getClass().getName());
    }
    /*
     * ISAAC encryption and decryption is completely
     * symmetrical, so the 'forEncryption' is
     * irrelevant.
     */
    KeyParameter p = (KeyParameter) params;
    setKey(p.getKey());
    return;
}