/*
* TeleStax, Open Source Cloud Communications Copyright 2012.
* and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.mobicents.protocols.ss7.map.service.mobility.authentication;
import java.io.IOException;
import org.mobicents.protocols.asn.AsnException;
import org.mobicents.protocols.asn.AsnInputStream;
import org.mobicents.protocols.asn.AsnOutputStream;
import org.mobicents.protocols.asn.Tag;
import org.mobicents.protocols.ss7.map.api.MAPException;
import org.mobicents.protocols.ss7.map.api.MAPParsingComponentException;
import org.mobicents.protocols.ss7.map.api.MAPParsingComponentExceptionReason;
import org.mobicents.protocols.ss7.map.api.service.mobility.authentication.AuthenticationTriplet;
import org.mobicents.protocols.ss7.map.primitives.MAPAsnPrimitive;
/**
*
* @author sergey vetyutnev
*
*/
public class AuthenticationTripletImpl implements AuthenticationTriplet, MAPAsnPrimitive {
public static final String _PrimitiveName = "AuthenticationTriplet";
private byte[] rand;
private byte[] sres;
private byte[] kc;
public AuthenticationTripletImpl() {
}
public AuthenticationTripletImpl(byte[] rand, byte[] sres, byte[] kc) {
this.rand = rand;
this.sres = sres;
this.kc = kc;
}
public byte[] getRand() {
return rand;
}
public byte[] getSres() {
return sres;
}
public byte[] getKc() {
return kc;
}
public int getTag() throws MAPException {
return Tag.SEQUENCE;
}
public int getTagClass() {
return Tag.CLASS_UNIVERSAL;
}
public boolean getIsPrimitive() {
return false;
}
public void decodeAll(AsnInputStream ansIS) throws MAPParsingComponentException {
try {
int length = ansIS.readLength();
this._decode(ansIS, length);
} catch (IOException e) {
throw new MAPParsingComponentException("IOException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
MAPParsingComponentExceptionReason.MistypedParameter);
} catch (AsnException e) {
throw new MAPParsingComponentException("AsnException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
MAPParsingComponentExceptionReason.MistypedParameter);
}
}
public void decodeData(AsnInputStream ansIS, int length) throws MAPParsingComponentException {
try {
this._decode(ansIS, length);
} catch (IOException e) {
throw new MAPParsingComponentException("IOException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
MAPParsingComponentExceptionReason.MistypedParameter);
} catch (AsnException e) {
throw new MAPParsingComponentException("AsnException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
MAPParsingComponentExceptionReason.MistypedParameter);
}
}
private void _decode(AsnInputStream ansIS, int length) throws MAPParsingComponentException, IOException, AsnException {
this.rand = null;
this.sres = null;
this.kc = null;
AsnInputStream ais = ansIS.readSequenceStreamData(length);
int num = 0;
while (true) {
if (ais.available() == 0)
break;
int tag = ais.readTag();
switch (num) {
case 0:
// rand
if (ais.getTagClass() != Tag.CLASS_UNIVERSAL || !ais.isTagPrimitive() || tag != Tag.STRING_OCTET)
throw new MAPParsingComponentException("Error while decoding " + _PrimitiveName
+ ".rand: Parameter 0 bad tag or tag class or is not primitive",
MAPParsingComponentExceptionReason.MistypedParameter);
this.rand = ais.readOctetString();
if (this.rand.length != 16)
throw new MAPParsingComponentException("Error while decoding " + _PrimitiveName
+ ".rand: Bad field length: 16 is needed, found: " + this.rand.length,
MAPParsingComponentExceptionReason.MistypedParameter);
break;
case 1:
// sres
if (ais.getTagClass() != Tag.CLASS_UNIVERSAL || !ais.isTagPrimitive() || tag != Tag.STRING_OCTET)
throw new MAPParsingComponentException("Error while decoding " + _PrimitiveName
+ ".sres: Parameter 1 bad tag or tag class or is not primitive",
MAPParsingComponentExceptionReason.MistypedParameter);
this.sres = ais.readOctetString();
if (this.sres.length != 4)
throw new MAPParsingComponentException("Error while decoding " + _PrimitiveName
+ ".sres: Bad field length: 4 is needed, found: " + this.sres.length,
MAPParsingComponentExceptionReason.MistypedParameter);
break;
case 2:
// kc
if (ais.getTagClass() != Tag.CLASS_UNIVERSAL || !ais.isTagPrimitive() || tag != Tag.STRING_OCTET)
throw new MAPParsingComponentException("Error while decoding " + _PrimitiveName
+ ".kc: Parameter 2 bad tag or tag class or is not primitive",
MAPParsingComponentExceptionReason.MistypedParameter);
this.kc = ais.readOctetString();
if (this.kc.length != 8)
throw new MAPParsingComponentException("Error while decoding " + _PrimitiveName
+ ".kc: Bad field length: 8 is needed, found: " + this.kc.length,
MAPParsingComponentExceptionReason.MistypedParameter);
break;
}
num++;
}
if (num < 3)
throw new MAPParsingComponentException("Error while decoding " + _PrimitiveName
+ ": Needs at least 3 mandatory parameters, found " + num,
MAPParsingComponentExceptionReason.MistypedParameter);
}
public void encodeAll(AsnOutputStream asnOs) throws MAPException {
this.encodeAll(asnOs, this.getTagClass(), this.getTag());
}
public void encodeAll(AsnOutputStream asnOs, int tagClass, int tag) throws MAPException {
try {
asnOs.writeTag(tagClass, this.getIsPrimitive(), tag);
int pos = asnOs.StartContentDefiniteLength();
this.encodeData(asnOs);
asnOs.FinalizeContent(pos);
} catch (AsnException e) {
throw new MAPException("AsnException when encoding " + _PrimitiveName + ": " + e.getMessage(), e);
}
}
public void encodeData(AsnOutputStream asnOs) throws MAPException {
if (this.rand == null || this.sres == null || this.kc == null) {
throw new MAPException("rand, sres and kc fields must not be null");
}
if (this.rand.length != 16)
throw new MAPException("Wrong rand field length: must be 16, found " + this.rand.length);
if (this.sres.length != 4)
throw new MAPException("Wrong sres field length: must be 4, found " + this.rand.length);
if (this.kc.length != 8)
throw new MAPException("Wrong kc field length: must be 8, found " + this.rand.length);
try {
asnOs.writeOctetString(this.rand);
asnOs.writeOctetString(this.sres);
asnOs.writeOctetString(this.kc);
} catch (IOException e) {
throw new MAPException("IOException when encoding " + _PrimitiveName + ": " + e.getMessage(), e);
} catch (AsnException e) {
throw new MAPException("AsnException when encoding " + _PrimitiveName + ": " + e.getMessage(), e);
}
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("AuthenticationTriplet [");
if (this.rand != null) {
sb.append("rand=[");
sb.append(printDataArr(this.rand));
sb.append("], ");
}
if (this.sres != null) {
sb.append("sres=[");
sb.append(printDataArr(this.sres));
sb.append("], ");
}
if (this.kc != null) {
sb.append("kc=[");
sb.append(printDataArr(this.kc));
sb.append("]");
}
sb.append("]");
return sb.toString();
}
private String printDataArr(byte[] arr) {
StringBuilder sb = new StringBuilder();
for (int b : arr) {
sb.append(b);
sb.append(", ");
}
return sb.toString();
}
}