package org.bouncycastle.asn1; import java.io.IOException; import org.bouncycastle.util.Arrays; import org.bouncycastle.util.Strings; /** * DER VisibleString object encoding ISO 646 (ASCII) character code points 32 to 126. *

* Explicit character set escape sequences are not allowed. *

*/ public class DERVisibleString extends ASN1Primitive implements ASN1String { private final byte[] string; /** * Return a Visible String from the passed in object. * * @param obj a DERVisibleString or an object that can be converted into one. * @exception IllegalArgumentException if the object cannot be converted. * @return a DERVisibleString instance, or null */ public static DERVisibleString getInstance( Object obj) { if (obj == null || obj instanceof DERVisibleString) { return (DERVisibleString)obj; } if (obj instanceof byte[]) { try { return (DERVisibleString)fromByteArray((byte[])obj); } catch (Exception e) { throw new IllegalArgumentException("encoding error in getInstance: " + e.toString()); } } throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName()); } /** * Return a Visible String 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 a DERVisibleString instance, or null */ public static DERVisibleString getInstance( ASN1TaggedObject obj, boolean explicit) { ASN1Primitive o = obj.getObject(); if (explicit || o instanceof DERVisibleString) { return getInstance(o); } else { return new DERVisibleString(ASN1OctetString.getInstance(o).getOctets()); } } /* * Basic constructor - byte encoded string. */ DERVisibleString( byte[] string) { this.string = string; } /** * Basic constructor * * @param string the string to be carried in the VisibleString object, */ public DERVisibleString( String string) { this.string = Strings.toByteArray(string); } public String getString() { return Strings.fromByteArray(string); } public String toString() { return getString(); } public byte[] getOctets() { return Arrays.clone(string); } boolean isConstructed() { return false; } int encodedLength() { return 1 + StreamUtil.calculateBodyLength(string.length) + string.length; } void encode( ASN1OutputStream out) throws IOException { out.writeEncoded(BERTags.VISIBLE_STRING, this.string); } boolean asn1Equals( ASN1Primitive o) { if (!(o instanceof DERVisibleString)) { return false; } return Arrays.areEqual(string, ((DERVisibleString)o).string); } public int hashCode() { return Arrays.hashCode(string); } }