package org.bouncycastle.asn1; import java.io.IOException; import org.bouncycastle.util.Arrays; import org.bouncycastle.util.Strings; /** * DER T61String (also the teletex string), try not to use this if you don't need to. The standard support the encoding for * this has been withdrawn. */ public class DERT61String extends ASN1Primitive implements ASN1String { private byte[] string; /** * return a T61 string from the passed in object. * * @param obj a DERT61String or an object that can be converted into one. * @exception IllegalArgumentException if the object cannot be converted. * @return a DERT61String instance, or null */ public static DERT61String getInstance( Object obj) { if (obj == null || obj instanceof DERT61String) { return (DERT61String)obj; } if (obj instanceof byte[]) { try { return (DERT61String)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 an T61 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 DERT61String instance, or null */ public static DERT61String getInstance( ASN1TaggedObject obj, boolean explicit) { ASN1Primitive o = obj.getObject(); if (explicit || o instanceof DERT61String) { return getInstance(o); } else { return new DERT61String(ASN1OctetString.getInstance(o).getOctets()); } } /** * basic constructor - string encoded as a sequence of bytes. * * @param string the byte encoding of the string to be wrapped. */ public DERT61String( byte[] string) { this.string = string; } /** * basic constructor - with string 8 bit assumed. * * @param string the string to be wrapped. */ public DERT61String( String string) { this(Strings.toByteArray(string)); } /** * Decode the encoded string and return it, 8 bit encoding assumed. * @return the decoded String */ public String getString() { return Strings.fromByteArray(string); } public String toString() { return getString(); } boolean isConstructed() { return false; } int encodedLength() { return 1 + StreamUtil.calculateBodyLength(string.length) + string.length; } void encode( ASN1OutputStream out) throws IOException { out.writeEncoded(BERTags.T61_STRING, string); } /** * Return the encoded string as a byte array. * @return the actual bytes making up the encoded body of the T61 string. */ public byte[] getOctets() { return Arrays.clone(string); } boolean asn1Equals( ASN1Primitive o) { if (!(o instanceof DERT61String)) { return false; } return Arrays.areEqual(string, ((DERT61String)o).string); } public int hashCode() { return Arrays.hashCode(string); } }