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package sun.security.krb5.internal.util;

import java.io.IOException;
import sun.security.action.GetPropertyAction;
import sun.security.util.DerValue;

import static java.nio.charset.StandardCharsets.*;

Implements the ASN.1 KerberosString type.
KerberosString  ::= GeneralString (IA5String)
This definition reflects the Network Working Group RFC 4120 specification available at http://www.ietf.org/rfc/rfc4120.txt.
/** * Implements the ASN.1 KerberosString type. * * <pre> * KerberosString ::= GeneralString (IA5String) * </pre> * * This definition reflects the Network Working Group RFC 4120 * specification available at * <a href="http://www.ietf.org/rfc/rfc4120.txt"> * http://www.ietf.org/rfc/rfc4120.txt</a>. */
public final class KerberosString {
RFC 4120 defines KerberosString as GeneralString (IA5String), which only includes ASCII characters. However, most implementations have been known to use GeneralString to contain UTF-8 encoding. The following system property is defined. When set as true, KerberosString is encoded as UTF-8. Otherwise, it's ASCII. The default is true. Note that this only affects the byte encoding, the tag of the ASN.1 type is still GeneralString.
/** * RFC 4120 defines KerberosString as GeneralString (IA5String), which * only includes ASCII characters. However, most implementations have been * known to use GeneralString to contain UTF-8 encoding. The following * system property is defined. When set as true, KerberosString is encoded * as UTF-8. Otherwise, it's ASCII. The default is true. * * Note that this only affects the byte encoding, the tag of the ASN.1 * type is still GeneralString. */
public static final boolean MSNAME; static { String prop = GetPropertyAction .privilegedGetProperty("sun.security.krb5.msinterop.kstring", "true"); MSNAME = Boolean.parseBoolean(prop); } private final String s; public KerberosString(String s) { this.s = s; } public KerberosString(DerValue der) throws IOException { if (der.tag != DerValue.tag_GeneralString) { throw new IOException( "KerberosString's tag is incorrect: " + der.tag); } s = new String(der.getDataBytes(), MSNAME ? UTF_8 : US_ASCII); } public String toString() { return s; } public DerValue toDerValue() { // No need to cache the result since this method is // only called once. return new DerValue(DerValue.tag_GeneralString, s.getBytes(MSNAME ? UTF_8 : US_ASCII)); } }