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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8. Note: this package includes the NTRU encryption algorithms.

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package org.bouncycastle.asn1;

import java.io.IOException;

/**
 * Public facade of ASN.1 Boolean data.
 * 

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

    *
  • 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 { static final ASN1UniversalType TYPE = new ASN1UniversalType(ASN1Boolean.class, BERTags.BOOLEAN) { ASN1Primitive fromImplicitPrimitive(DEROctetString octetString) { return createPrimitive(octetString.getOctets()); } }; private static final byte FALSE_VALUE = 0x00; private static final byte TRUE_VALUE = (byte)0xFF; public static final ASN1Boolean FALSE = new ASN1Boolean(FALSE_VALUE); public static final ASN1Boolean TRUE = new ASN1Boolean(TRUE_VALUE); private final byte value; /** * 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)TYPE.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 taggedObject 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 taggedObject, boolean explicit) { return (ASN1Boolean)TYPE.getContextInstance(taggedObject, explicit); } private ASN1Boolean(byte value) { this.value = value; } public boolean isTrue() { return value != FALSE_VALUE; } boolean encodeConstructed() { return false; } int encodedLength(boolean withTag) { return ASN1OutputStream.getLengthOfEncodingDL(withTag, 1); } void encode(ASN1OutputStream out, boolean withTag) throws IOException { out.writeEncodingDL(withTag, BERTags.BOOLEAN, value); } boolean asn1Equals(ASN1Primitive other) { if (!(other instanceof ASN1Boolean)) { return false; } ASN1Boolean that = (ASN1Boolean)other; return this.isTrue() == that.isTrue(); } public int hashCode() { return isTrue() ? 1 : 0; } ASN1Primitive toDERObject() { return isTrue() ? TRUE : FALSE; } public String toString() { return isTrue() ? "TRUE" : "FALSE"; } static ASN1Boolean createPrimitive(byte[] contents) { if (contents.length != 1) { throw new IllegalArgumentException("BOOLEAN value should have 1 byte in it"); } byte b = contents[0]; switch (b) { case FALSE_VALUE: return FALSE; case TRUE_VALUE: return TRUE; default: return new ASN1Boolean(b); } } }




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