com.hierynomus.msdtyp.ace.ACE 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.msdtyp.ace;

import com.hierynomus.msdtyp.AccessMask;
import com.hierynomus.msdtyp.SID;
import com.hierynomus.protocol.commons.EnumWithValue;
import com.hierynomus.protocol.commons.buffer.Buffer;
import com.hierynomus.smbj.common.SMBBuffer;

import static com.hierynomus.protocol.commons.EnumWithValue.EnumUtils.valueOf;

/**
 * [MS-DTYP].pdf 2.4.4 ACE
 */
public abstract class ACE {

    static int HEADER_STRUCTURE_SIZE = 4;

    AceHeader aceHeader = new AceHeader();

    long accessMask;
    private SID sid = new SID();

    ACE(AceHeader aceHeader, long accessMask, SID sid) {
        this.aceHeader = aceHeader;
        this.accessMask = accessMask;
        this.sid = sid;
    }

    protected ACE() {
    }

    public final void write(SMBBuffer buffer) {
        aceHeader.writeTo(buffer);
        writeTo(buffer);
    }

    protected abstract void writeTo(SMBBuffer buffer);

    public final ACE read(SMBBuffer buffer) throws Buffer.BufferException {
        aceHeader.readFrom(buffer);
        readMessage(buffer);
        return this;
    }

    public static ACE factory(SMBBuffer buffer) throws Buffer.BufferException {
        AceType aceType = valueOf(buffer.readByte(), AceType.class, null);
        buffer.rpos(buffer.rpos() - 1); // Go back
        ACE ace = null;
        switch (aceType) {
            case ACCESS_ALLOWED_ACE_TYPE:
                ace = new AceType1().read(buffer);
                break;
            case ACCESS_ALLOWED_CALLBACK_ACE_TYPE:
                ace = new AceType3().read(buffer);
                break;
            case ACCESS_ALLOWED_CALLBACK_OBJECT_ACE_TYPE:
                ace = new AceType4().read(buffer);
                break;
            case ACCESS_ALLOWED_OBJECT_ACE_TYPE:
                ace = new AceType2().read(buffer);
                break;
            case ACCESS_DENIED_ACE_TYPE:
                ace = new AceType1().read(buffer);
                break;
            case ACCESS_DENIED_CALLBACK_ACE_TYPE:
                ace = new AceType3().read(buffer);
                break;
            case ACCESS_DENIED_CALLBACK_OBJECT_ACE_TYPE:
                ace = new AceType4().read(buffer);
                break;
            case ACCESS_DENIED_OBJECT_ACE_TYPE:
                ace = new AceType2().read(buffer);
                break;
            case SYSTEM_AUDIT_ACE_TYPE:
                ace = new AceType1().read(buffer);
                break;
            case SYSTEM_AUDIT_CALLBACK_ACE_TYPE:
                ace = new AceType3().read(buffer);
                break;
            case SYSTEM_AUDIT_CALLBACK_OBJECT_ACE_TYPE:
                ace = new AceType4().read(buffer);
                break;
            case SYSTEM_AUDIT_OBJECT_ACE_TYPE:
                ace = new AceType4().read(buffer);
                break;
            case SYSTEM_MANDATORY_LABEL_ACE_TYPE:
                ace = new AceType1().read(buffer);
                break;
            case SYSTEM_RESOURCE_ATTRIBUTE_ACE_TYPE:
                ace = new AceType3().read(buffer);
                break;
            case SYSTEM_SCOPED_POLICY_ID_ACE_TYPE:
                ace = new AceType1().read(buffer);
                break;
            default:
                throw new IllegalStateException("Unknown ACE type: " + aceType);
        }

        return ace;
    }

    @Override
    public String toString() {
        return "ACE{" +
                "aceHeader=" + aceHeader +
                ", accessMask=" + EnumWithValue.EnumUtils.toEnumSet(accessMask, AccessMask.class) +
                ", sid=" + sid +
                '}';
    }

    protected abstract void readMessage(SMBBuffer buffer) throws Buffer.BufferException;

    public AceHeader getAceHeader() {
        return aceHeader;
    }

    public SID getSid() {
        return sid;
    }

    public long getAccessMask() {
        return accessMask;
    }
}