com.hierynomus.security.jce.JceCipher 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
There is a newer version: 0.13.0
/*
 * 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.Cipher;
import com.hierynomus.security.SecurityException;

import javax.crypto.BadPaddingException;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.ShortBufferException;
import javax.crypto.spec.SecretKeySpec;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.Provider;

public class JceCipher implements Cipher {
    private javax.crypto.Cipher cipher;

    JceCipher(String name, Provider jceProvider, String providerName) throws SecurityException {
        try {
            if (jceProvider != null) {
                this.cipher = javax.crypto.Cipher.getInstance(name, jceProvider);
            } else if (providerName != null) {
                this.cipher = javax.crypto.Cipher.getInstance(name, providerName);
            } else {
                this.cipher = javax.crypto.Cipher.getInstance(name);
            }
        } catch (NoSuchAlgorithmException | NoSuchPaddingException | NoSuchProviderException e) {
            throw new SecurityException(e);
        }
    }

    @Override
    public void init(CryptMode cryptMode, byte[] bytes) throws SecurityException {
        try {
            if (CryptMode.DECRYPT == cryptMode) {
                cipher.init(javax.crypto.Cipher.DECRYPT_MODE, new SecretKeySpec(bytes, cipher.getAlgorithm().split("/")[0]));
            } else {
                cipher.init(javax.crypto.Cipher.ENCRYPT_MODE, new SecretKeySpec(bytes, cipher.getAlgorithm().split("/")[0]));
            }
        } catch (InvalidKeyException e) {
            throw new SecurityException(e);
        }
    }

    @Override
    public int update(byte[] in, int inOff, int bytes, byte[] out, int outOff) throws SecurityException {
        try {
            return cipher.update(in, inOff, bytes, out, outOff);
        } catch (ShortBufferException e) {
            throw new SecurityException(e);
        }
    }

    @Override
    public int doFinal(byte[] out, int outOff) throws SecurityException {
        try {
            return cipher.doFinal(out, outOff);
        } catch (BadPaddingException | IllegalBlockSizeException | ShortBufferException e) {
            throw new SecurityException(e);
        }
    }

    @Override
    public void reset() {
        // no-op
    }
}