org.bouncycastle.bcpg.UserAttributeSubpacket.java Source code

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Here is the source code for org.bouncycastle.bcpg.UserAttributeSubpacket.java

Source

package org.bouncycastle.bcpg;

import java.io.IOException;
import java.io.OutputStream;

import org.bouncycastle.util.Arrays;

/**
 * Basic type for a user attribute sub-packet.
 */
public class UserAttributeSubpacket {
    int type;
    private boolean forceLongLength; // we preserve this as not everyone encodes length properly.
    protected byte[] data;

    protected UserAttributeSubpacket(int type, byte[] data) {
        this(type, false, data);
    }

    protected UserAttributeSubpacket(int type, boolean forceLongLength, byte[] data) {
        this.type = type;
        this.forceLongLength = forceLongLength;
        this.data = data;
    }

    public int getType() {
        return type;
    }

    /**
     * return the generic data making up the packet.
     */
    public byte[] getData() {
        return data;
    }

    public void encode(OutputStream out) throws IOException {
        int bodyLen = data.length + 1;

        if (bodyLen < 192 && !forceLongLength) {
            out.write((byte) bodyLen);
        } else if (bodyLen <= 8383 && !forceLongLength) {
            bodyLen -= 192;

            out.write((byte) (((bodyLen >> 8) & 0xff) + 192));
            out.write((byte) bodyLen);
        } else {
            out.write(0xff);
            out.write((byte) (bodyLen >> 24));
            out.write((byte) (bodyLen >> 16));
            out.write((byte) (bodyLen >> 8));
            out.write((byte) bodyLen);
        }

        out.write(type);
        out.write(data);
    }

    public boolean equals(Object o) {
        if (o == this) {
            return true;
        }

        if (!(o instanceof UserAttributeSubpacket)) {
            return false;
        }

        UserAttributeSubpacket other = (UserAttributeSubpacket) o;

        return this.type == other.type && Arrays.areEqual(this.data, other.data);
    }

    public int hashCode() {
        return type ^ Arrays.hashCode(data);
    }
}