nl.open.jwtdependency.org.bouncycastle.asn1.ASN1Boolean Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of java-jwt-nodependencies Show documentation
This is a drop in replacement for the auth0 java-jwt library (see https://github.com/auth0/java-jwt). This jar makes sure there are no external dependencies (e.g. fasterXml, Apacha Commons) needed. This is useful when deploying to an application server (e.g. tomcat with Alfreso or Pega).
The newest version!
package org.bouncycastle.asn1;

import java.io.IOException;

import org.bouncycastle.util.Arrays;

/**
 * Public facade of ASN.1 Boolean data.
 * 
 * Use following to place a new instance of ASN.1 Boolean in your dataset:
 * 

 *  ASN1Boolean.TRUE literal
 *  ASN1Boolean.FALSE literal
 *  {@link ASN1Boolean#getInstance(boolean) ASN1Boolean.getInstance(boolean)}
 *  {@link ASN1Boolean#getInstance(int) ASN1Boolean.getInstance(int)}
 * 
 * 
 */
public class ASN1Boolean
    extends ASN1Primitive
{
    private static final byte[] TRUE_VALUE = new byte[] { (byte)0xff };
    private static final byte[] FALSE_VALUE = new byte[] { 0 };

    private final byte[]         value;

    public static final ASN1Boolean FALSE = new ASN1Boolean(false);
    public static final ASN1Boolean TRUE  = new ASN1Boolean(true);

    /**
     * return a boolean from the passed in object.
     *
     * @param obj an ASN1Boolean or an object that can be converted into one.
     * @exception IllegalArgumentException if the object cannot be converted.
     * @return an ASN1Boolean instance.
     */
    public static ASN1Boolean getInstance(
        Object  obj)
    {
        if (obj == null || obj instanceof ASN1Boolean)
        {
            return (ASN1Boolean)obj;
        }

        if (obj instanceof byte[])
        {
            byte[] enc = (byte[])obj;
            try
            {
                return (ASN1Boolean)fromByteArray(enc);
            }
            catch (IOException e)
            {
                throw new IllegalArgumentException("failed to construct boolean from byte[]: " + e.getMessage());
            }
        }

        throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName());
    }

    /**
     * return an ASN1Boolean from the passed in boolean.
     * @param value true or false depending on the ASN1Boolean wanted.
     * @return an ASN1Boolean instance.
     */
    public static ASN1Boolean getInstance(
        boolean  value)
    {
        return (value ? TRUE : FALSE);
    }

    /**
     * return an ASN1Boolean from the passed in value.
     * @param value non-zero (true) or zero (false) depending on the ASN1Boolean wanted.
     * @return an ASN1Boolean instance.
     */
    public static ASN1Boolean getInstance(
        int value)
    {
        return (value != 0 ? TRUE : FALSE);
    }

    /**
     * return a Boolean from a tagged object.
     *
     * @param obj the tagged object holding the object we want
     * @param explicit true if the object is meant to be explicitly
     *              tagged false otherwise.
     * @exception IllegalArgumentException if the tagged object cannot
     *               be converted.
     * @return an ASN1Boolean instance.
     */
    public static ASN1Boolean getInstance(
        ASN1TaggedObject obj,
        boolean          explicit)
    {
        ASN1Primitive o = obj.getObject();

        if (explicit || o instanceof ASN1Boolean)
        {
            return getInstance(o);
        }
        else
        {
            return ASN1Boolean.fromOctetString(((ASN1OctetString)o).getOctets());
        }
    }

    ASN1Boolean(
        byte[] value)
    {
        if (value.length != 1)
        {
            throw new IllegalArgumentException("byte value should have 1 byte in it");
        }

        if (value[0] == 0)
        {
            this.value = FALSE_VALUE;
        }
        else if ((value[0] & 0xff) == 0xff)
        {
            this.value = TRUE_VALUE;
        }
        else
        {
            this.value = Arrays.clone(value);
        }
    }

    /**
     * @deprecated use getInstance(boolean) method.
     * @param value true or false.
     */
    public ASN1Boolean(
        boolean     value)
    {
        this.value = (value) ? TRUE_VALUE : FALSE_VALUE;
    }

    public boolean isTrue()
    {
        return (value[0] != 0);
    }

    boolean isConstructed()
    {
        return false;
    }

    int encodedLength()
    {
        return 3;
    }

    void encode(
        ASN1OutputStream out)
        throws IOException
    {
        out.writeEncoded(BERTags.BOOLEAN, value);
    }

    protected boolean asn1Equals(
        ASN1Primitive  o)
    {
        if (o instanceof ASN1Boolean)
        {
            return (value[0] == ((ASN1Boolean)o).value[0]);
        }

        return false;
    }

    public int hashCode()
    {
        return value[0];
    }


    public String toString()
    {
      return (value[0] != 0) ? "TRUE" : "FALSE";
    }

    static ASN1Boolean fromOctetString(byte[] value)
    {
        if (value.length != 1)
        {
            throw new IllegalArgumentException("BOOLEAN value should have 1 byte in it");
        }

        if (value[0] == 0)
        {
            return FALSE;
        }
        else if ((value[0] & 0xff) == 0xff)
        {
            return TRUE;
        }
        else
        {
            return new ASN1Boolean(value);
        }
    }
}