com.hierynomus.security.jce.JceMac Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of smbj Show documentation
SMB2 protocol library for communication with Windows servers
The newest version!
/*
 * Copyright (C)2016 - SMBJ Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.hierynomus.security.jce;

import com.hierynomus.security.Mac;
import com.hierynomus.security.SecurityException;

import javax.crypto.spec.SecretKeySpec;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.Provider;

public class JceMac implements Mac {
    private final String algorithm;
    private javax.crypto.Mac mac;

    public JceMac(String algorithm, Provider jceProvider, String providerName) throws SecurityException {
        this.algorithm = algorithm;
        try {
            if (jceProvider != null) {
                mac = javax.crypto.Mac.getInstance(algorithm, jceProvider);
            } else if (providerName != null) {
                mac = javax.crypto.Mac.getInstance(algorithm, providerName);
            } else {
                mac = javax.crypto.Mac.getInstance(algorithm);
            }
        } catch (NoSuchProviderException | NoSuchAlgorithmException e) {
            throw new SecurityException(e);
        }
    }

    @Override
    public void init(byte[] key) throws SecurityException {
        try {
            mac.init(new SecretKeySpec(key, algorithm));
        } catch (InvalidKeyException e) {
            throw new SecurityException(e);
        }
    }

    @Override
    public void update(byte b) {
        mac.update(b);
    }

    @Override
    public void update(byte[] array) {
        mac.update(array);
    }

    @Override
    public void update(byte[] array, int offset, int length) {
        mac.update(array, offset, length);
    }

    @Override
    public byte[] doFinal() {
        return mac.doFinal();
    }

    @Override
    public void reset() {
        mac.reset();
    }
}