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package sun.security.krb5.internal;

import java.io.IOException;

import static java.nio.charset.StandardCharsets.UTF_8;

import sun.security.krb5.Asn1Exception;
import sun.security.krb5.internal.util.KerberosString;
import sun.security.util.*;

Implements the ASN.1 ETYPE-INFO-ENTRY type. ETYPE-INFO-ENTRY ::= SEQUENCE { etype [0] Int32, salt [1] OCTET STRING OPTIONAL }
Author:Seema Malkani
/** * Implements the ASN.1 ETYPE-INFO-ENTRY type. * * ETYPE-INFO-ENTRY ::= SEQUENCE { * etype [0] Int32, * salt [1] OCTET STRING OPTIONAL * } * * @author Seema Malkani */
public class ETypeInfo { private int etype; private String salt = null; private static final byte TAG_TYPE = 0; private static final byte TAG_VALUE = 1; private ETypeInfo() { } public ETypeInfo(int etype, String salt) { this.etype = etype; this.salt = salt; } public Object clone() { return new ETypeInfo(etype, salt); }
Constructs a ETypeInfo object.
Params:
  • encoding – a DER-encoded data.
Throws:
  • Asn1Exception – if an error occurs while decoding an ASN1 encoded data.
  • IOException – if an I/O error occurs while reading encoded data.
/** * Constructs a ETypeInfo object. * @param encoding a DER-encoded data. * @exception Asn1Exception if an error occurs while decoding an * ASN1 encoded data. * @exception IOException if an I/O error occurs while reading encoded data. */
public ETypeInfo(DerValue encoding) throws Asn1Exception, IOException { DerValue der = null; if (encoding.getTag() != DerValue.tag_Sequence) { throw new Asn1Exception(Krb5.ASN1_BAD_ID); } // etype der = encoding.getData().getDerValue(); if ((der.getTag() & 0x1F) == 0x00) { this.etype = der.getData().getBigInteger().intValue(); } else throw new Asn1Exception(Krb5.ASN1_BAD_ID); // salt if (encoding.getData().available() > 0) { der = encoding.getData().getDerValue(); if ((der.getTag() & 0x1F) == 0x01) { byte[] saltBytes = der.getData().getOctetString(); // Although salt is defined as an OCTET STRING, it's the // encoding from of a string. As RFC 4120 says: // // "The salt, ..., is also completely unspecified with respect // to character set and is probably locale-specific". // // It's known that this field is using the same encoding as // KerberosString in most implementations. if (KerberosString.MSNAME) { this.salt = new String(saltBytes, UTF_8); } else { this.salt = new String(saltBytes); } } } if (encoding.getData().available() > 0) throw new Asn1Exception(Krb5.ASN1_BAD_ID); }
Encodes this object to an OutputStream.
Throws:
Returns:byte array of the encoded data.
/** * Encodes this object to an OutputStream. * * @return byte array of the encoded data. * @exception IOException if an I/O error occurs while reading encoded data. * @exception Asn1Exception on encoding errors. */
public byte[] asn1Encode() throws Asn1Exception, IOException { DerOutputStream bytes = new DerOutputStream(); DerOutputStream temp = new DerOutputStream(); temp.putInteger(etype); bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, TAG_TYPE), temp); if (salt != null) { temp = new DerOutputStream(); if (KerberosString.MSNAME) { temp.putOctetString(salt.getBytes(UTF_8)); } else { temp.putOctetString(salt.getBytes()); } bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, TAG_VALUE), temp); } temp = new DerOutputStream(); temp.write(DerValue.tag_Sequence, bytes); return temp.toByteArray(); } // accessor methods public int getEType() { return etype; } public String getSalt() { return salt; } }