package org.bouncycastle.asn1.x509; import org.bouncycastle.asn1.ASN1Encodable; import org.bouncycastle.asn1.DERObject; import org.bouncycastle.asn1.DERBMPString; import org.bouncycastle.asn1.DERIA5String; import org.bouncycastle.asn1.DERUTF8String; import org.bouncycastle.asn1.DERVisibleString; import org.bouncycastle.asn1.DERString; /** * <code>DisplayText</code> class, used in * <code>CertificatePolicies</code> X509 V3 extensions (in policy qualifiers). * * <p>It stores a string in a chosen encoding. * <pre> * DisplayText ::= CHOICE { * ia5String IA5String (SIZE (1..200)), * visibleString VisibleString (SIZE (1..200)), * bmpString BMPString (SIZE (1..200)), * utf8String UTF8String (SIZE (1..200)) } * </pre> * @see PolicyQualifierInfo * @see PolicyInformation */ public class DisplayText extends ASN1Encodable { /** * Constant corresponding to ia5String encoding. * */ public static final int CONTENT_TYPE_IA5STRING = 0; /** * Constant corresponding to bmpString encoding. * */ public static final int CONTENT_TYPE_BMPSTRING = 1; /** * Constant corresponding to utf8String encoding. * */ public static final int CONTENT_TYPE_UTF8STRING = 2; /** * Constant corresponding to visibleString encoding. * */ public static final int CONTENT_TYPE_VISIBLESTRING = 3; /** * Describe constant <code>DISPLAY_TEXT_MAXIMUM_SIZE</code> here. * */ public static final int DISPLAY_TEXT_MAXIMUM_SIZE = 200; int contentType; DERString contents; /** * Creates a new <code>DisplayText</code> instance. * * @param type the desired encoding type for the text. * @param text the text to store. Strings longer than 200 * characters are truncated. */ public DisplayText (int type, String text) { if (text.length() > DISPLAY_TEXT_MAXIMUM_SIZE) { // RFC3280 limits these strings to 200 chars // truncate the string text = text.substring (0, DISPLAY_TEXT_MAXIMUM_SIZE); } contentType = type; switch (type) { case CONTENT_TYPE_IA5STRING: contents = (DERString)new DERIA5String (text); break; case CONTENT_TYPE_UTF8STRING: contents = (DERString)new DERUTF8String(text); break; case CONTENT_TYPE_VISIBLESTRING: contents = (DERString)new DERVisibleString(text); break; case CONTENT_TYPE_BMPSTRING: contents = (DERString)new DERBMPString(text); break; default: contents = (DERString)new DERUTF8String(text); break; } } /** * Creates a new <code>DisplayText</code> instance. * * @param text the text to encapsulate. Strings longer than 200 * characters are truncated. */ public DisplayText (String text) { // by default use UTF8String if (text.length() > DISPLAY_TEXT_MAXIMUM_SIZE) { text = text.substring(0, DISPLAY_TEXT_MAXIMUM_SIZE); } contentType = CONTENT_TYPE_UTF8STRING; contents = new DERUTF8String(text); } /** * Creates a new <code>DisplayText</code> instance. * <p>Useful when reading back a <code>DisplayText</code> class * from it's ASN1Encodable/DEREncodable form. * * @param de a <code>DEREncodable</code> instance. */ public DisplayText(DERString de) { contents = de; } public static DisplayText getInstance(Object de) { if (de instanceof DERString) { return new DisplayText((DERString)de); } else if (de instanceof DisplayText) { return (DisplayText)de; } throw new IllegalArgumentException("illegal object in getInstance"); } public DERObject toASN1Object() { return (DERObject)contents; } /** * Returns the stored <code>String</code> object. * * @return the stored text as a <code>String</code>. */ public String getString() { return contents.getString(); } }