/**
* Constructs a LastReqEntry 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 LastReqEntry(DerValue encoding) throws Asn1Exception, IOException {
if (encoding.getTag() != DerValue.tag_Sequence) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
DerValue der;
der = encoding.getData().getDerValue();
if ((der.getTag() & 0x1F) == 0x00) {
lrType = der.getData().getBigInteger().intValue();
} else throw new Asn1Exception(Krb5.ASN1_BAD_ID);
lrValue = KerberosTime.parse(encoding.getData(), (byte) 0x01, false);
if (encoding.getData().available() > 0) throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
/**
* Constructs an instance of Checksum from an ASN.1 encoded representation.
*
* @param encoding a single DER-encoded value.
* @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.
* @exception IOException if an I/O error occurs while reading encoded data.
*/
private Checksum(DerValue encoding) throws Asn1Exception, IOException {
DerValue der;
if (encoding.getTag() != DerValue.tag_Sequence) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
der = encoding.getData().getDerValue();
if ((der.getTag() & (byte) 0x1F) == (byte) 0x00) {
cksumType = der.getData().getBigInteger().intValue();
} else throw new Asn1Exception(Krb5.ASN1_BAD_ID);
der = encoding.getData().getDerValue();
if ((der.getTag() & (byte) 0x1F) == (byte) 0x01) {
checksum = der.getData().getOctetString();
} else throw new Asn1Exception(Krb5.ASN1_BAD_ID);
if (encoding.getData().available() > 0) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
}
/**
* Initializes an APRep object.
*
* @param encoding a single DER-encoded value.
* @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.
* @exception IOException if an I/O error occurs while reading encoded data.
* @exception KrbApErrException if the value read from the DER-encoded data stream does not match
* the pre-defined value.
*/
private void init(DerValue encoding) throws Asn1Exception, KrbApErrException, IOException {
if (((encoding.getTag() & (byte) (0x1F)) != Krb5.KRB_AP_REP)
|| (encoding.isApplication() != true)
|| (encoding.isConstructed() != true)) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
DerValue der = encoding.getData().getDerValue();
if (der.getTag() != DerValue.tag_Sequence) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
DerValue subDer = der.getData().getDerValue();
if ((subDer.getTag() & (byte) 0x1F) != (byte) 0x00) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
pvno = subDer.getData().getBigInteger().intValue();
if (pvno != Krb5.PVNO) {
throw new KrbApErrException(Krb5.KRB_AP_ERR_BADVERSION);
}
subDer = der.getData().getDerValue();
if ((subDer.getTag() & (byte) 0x1F) != (byte) 0x01) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
msgType = subDer.getData().getBigInteger().intValue();
if (msgType != Krb5.KRB_AP_REP) {
throw new KrbApErrException(Krb5.KRB_AP_ERR_MSG_TYPE);
}
encPart = EncryptedData.parse(der.getData(), (byte) 0x02, false);
if (der.getData().available() > 0) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
}
/**
* Parse (unmarshal) a realm from a DER input stream. This form parsing might be used when
* expanding a value which is part of a constructed sequence and uses explicitly tagged type.
*
* @exception Asn1Exception on error.
* @param data the Der input stream value, which contains one or more marshaled value.
* @param explicitTag tag number.
* @param optional indicate if this data field is optional
* @return an instance of Realm.
*/
public static Realm parse(DerInputStream data, byte explicitTag, boolean optional)
throws Asn1Exception, IOException, RealmException {
if ((optional) && (((byte) data.peekByte() & (byte) 0x1F) != explicitTag)) {
return null;
}
DerValue der = data.getDerValue();
if (explicitTag != (der.getTag() & (byte) 0x1F)) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
} else {
DerValue subDer = der.getData().getDerValue();
return new Realm(subDer);
}
}
/**
* Parse (unmarshal) a <code>PrincipalName</code> from a DER input stream. This form parsing might
* be used when expanding a value which is part of a constructed sequence and uses explicitly
* tagged type.
*
* @exception Asn1Exception on error.
* @param data the Der input stream value, which contains one or more marshaled value.
* @param explicitTag tag number.
* @param optional indicate if this data field is optional
* @param realm the realm for the name
* @return an instance of <code>PrincipalName</code>, or null if the field is optional and
* missing.
*/
public static PrincipalName parse(
DerInputStream data, byte explicitTag, boolean optional, Realm realm)
throws Asn1Exception, IOException, RealmException {
if ((optional) && (((byte) data.peekByte() & (byte) 0x1F) != explicitTag)) return null;
DerValue der = data.getDerValue();
if (explicitTag != (der.getTag() & (byte) 0x1F)) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
} else {
DerValue subDer = der.getData().getDerValue();
if (realm == null) {
realm = Realm.getDefault();
}
return new PrincipalName(subDer, realm);
}
}
/**
* Constructs a MethodData 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 MethodData(DerValue encoding) throws Asn1Exception, IOException {
DerValue der;
if (encoding.getTag() != DerValue.tag_Sequence) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
der = encoding.getData().getDerValue();
if ((der.getTag() & 0x1F) == 0x00) {
BigInteger bint = der.getData().getBigInteger();
methodType = bint.intValue();
} else throw new Asn1Exception(Krb5.ASN1_BAD_ID);
if (encoding.getData().available() > 0) {
der = encoding.getData().getDerValue();
if ((der.getTag() & 0x1F) == 0x01) {
methodData = der.getData().getOctetString();
} else throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
if (encoding.getData().available() > 0) throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
/**
* Returns the ASN.1 encoding of the <xmp> PrincipalName ::= SEQUENCE { name-type [0] Int32,
* name-string [1] SEQUENCE OF KerberosString }
*
* <p>KerberosString ::= GeneralString (IA5String) </xmp>
*
* <p>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>.
*
* @param encoding a Der-encoded data.
* @param realm the realm for this name
* @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.
* @exception Asn1Exception if there is an ASN1 encoding error
* @exception IOException if an I/O error occurs
* @exception IllegalArgumentException if encoding is null reading encoded data.
*/
public PrincipalName(DerValue encoding, Realm realm) throws Asn1Exception, IOException {
if (realm == null) {
throw new IllegalArgumentException("Null realm not allowed");
}
nameRealm = realm;
DerValue der;
if (encoding == null) {
throw new IllegalArgumentException("Null encoding not allowed");
}
if (encoding.getTag() != DerValue.tag_Sequence) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
der = encoding.getData().getDerValue();
if ((der.getTag() & 0x1F) == 0x00) {
BigInteger bint = der.getData().getBigInteger();
nameType = bint.intValue();
} else {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
der = encoding.getData().getDerValue();
if ((der.getTag() & 0x01F) == 0x01) {
DerValue subDer = der.getData().getDerValue();
if (subDer.getTag() != DerValue.tag_SequenceOf) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
Vector<String> v = new Vector<>();
DerValue subSubDer;
while (subDer.getData().available() > 0) {
subSubDer = subDer.getData().getDerValue();
String namePart = new KerberosString(subSubDer).toString();
v.addElement(namePart);
}
nameStrings = new String[v.size()];
v.copyInto(nameStrings);
validateNameStrings(nameStrings);
} else {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
}
private void init(DerValue encoding) throws Asn1Exception, IOException, RealmException {
DerValue der, subDer;
renewTill = null;
caddr = null;
authorizationData = null;
if (((encoding.getTag() & (byte) 0x1F) != (byte) 0x03)
|| (encoding.isApplication() != true)
|| (encoding.isConstructed() != true)) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
der = encoding.getData().getDerValue();
if (der.getTag() != DerValue.tag_Sequence) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
flags = TicketFlags.parse(der.getData(), (byte) 0x00, false);
key = EncryptionKey.parse(der.getData(), (byte) 0x01, false);
Realm crealm = Realm.parse(der.getData(), (byte) 0x02, false);
cname = PrincipalName.parse(der.getData(), (byte) 0x03, false, crealm);
transited = TransitedEncoding.parse(der.getData(), (byte) 0x04, false);
authtime = KerberosTime.parse(der.getData(), (byte) 0x05, false);
starttime = KerberosTime.parse(der.getData(), (byte) 0x06, true);
endtime = KerberosTime.parse(der.getData(), (byte) 0x07, false);
if (der.getData().available() > 0) {
renewTill = KerberosTime.parse(der.getData(), (byte) 0x08, true);
}
if (der.getData().available() > 0) {
caddr = HostAddresses.parse(der.getData(), (byte) 0x09, true);
}
if (der.getData().available() > 0) {
authorizationData = AuthorizationData.parse(der.getData(), (byte) 0x0A, true);
}
if (der.getData().available() > 0) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
}
/*
* Create an OCSP response from its ASN.1 DER encoding.
*/
OCSPResponse(byte[] bytes) throws IOException {
if (dump) {
HexDumpEncoder hexEnc = new HexDumpEncoder();
System.out.println("OCSPResponse bytes are...");
System.out.println(hexEnc.encode(bytes));
}
DerValue der = new DerValue(bytes);
if (der.tag != DerValue.tag_Sequence) {
throw new IOException("Bad encoding in OCSP response: " + "expected ASN.1 SEQUENCE tag.");
}
DerInputStream derIn = der.getData();
// responseStatus
int status = derIn.getEnumerated();
if (status >= 0 && status < rsvalues.length) {
responseStatus = rsvalues[status];
} else {
// unspecified responseStatus
throw new IOException("Unknown OCSPResponse status: " + status);
}
if (debug != null) {
debug.println("OCSP response status: " + responseStatus);
}
if (responseStatus != ResponseStatus.SUCCESSFUL) {
// no need to continue, responseBytes are not set.
singleResponseMap = Collections.emptyMap();
certs = Collections.<X509CertImpl>emptyList();
sigAlgId = null;
signature = null;
tbsResponseData = null;
responseNonce = null;
return;
}
// responseBytes
der = derIn.getDerValue();
if (!der.isContextSpecific((byte) 0)) {
throw new IOException(
"Bad encoding in responseBytes element "
+ "of OCSP response: expected ASN.1 context specific tag 0.");
}
DerValue tmp = der.data.getDerValue();
if (tmp.tag != DerValue.tag_Sequence) {
throw new IOException(
"Bad encoding in responseBytes element "
+ "of OCSP response: expected ASN.1 SEQUENCE tag.");
}
// responseType
derIn = tmp.data;
ObjectIdentifier responseType = derIn.getOID();
if (responseType.equals((Object) OCSP_BASIC_RESPONSE_OID)) {
if (debug != null) {
debug.println("OCSP response type: basic");
}
} else {
if (debug != null) {
debug.println("OCSP response type: " + responseType);
}
throw new IOException("Unsupported OCSP response type: " + responseType);
}
// BasicOCSPResponse
DerInputStream basicOCSPResponse = new DerInputStream(derIn.getOctetString());
DerValue[] seqTmp = basicOCSPResponse.getSequence(2);
if (seqTmp.length < 3) {
throw new IOException("Unexpected BasicOCSPResponse value");
}
DerValue responseData = seqTmp[0];
// Need the DER encoded ResponseData to verify the signature later
tbsResponseData = seqTmp[0].toByteArray();
// tbsResponseData
if (responseData.tag != DerValue.tag_Sequence) {
throw new IOException(
"Bad encoding in tbsResponseData "
+ "element of OCSP response: expected ASN.1 SEQUENCE tag.");
}
DerInputStream seqDerIn = responseData.data;
DerValue seq = seqDerIn.getDerValue();
// version
if (seq.isContextSpecific((byte) 0)) {
// seq[0] is version
if (seq.isConstructed() && seq.isContextSpecific()) {
// System.out.println ("version is available");
seq = seq.data.getDerValue();
int version = seq.getInteger();
if (seq.data.available() != 0) {
throw new IOException(
"Bad encoding in version " + " element of OCSP response: bad format");
}
seq = seqDerIn.getDerValue();
}
}
// responderID
short tag = (byte) (seq.tag & 0x1f);
if (tag == NAME_TAG) {
if (debug != null) {
X500Principal responderName = new X500Principal(seq.getData().toByteArray());
debug.println("OCSP Responder name: " + responderName);
}
} else if (tag == KEY_TAG) {
if (debug != null) {
byte[] responderKey = seq.getData().getOctetString();
debug.println("OCSP Responder key: " + Debug.toString(responderKey));
}
} else {
throw new IOException(
"Bad encoding in responderID element of "
+ "OCSP response: expected ASN.1 context specific tag 0 or 1");
}
// producedAt
seq = seqDerIn.getDerValue();
if (debug != null) {
Date producedAtDate = seq.getGeneralizedTime();
debug.println("OCSP response produced at: " + producedAtDate);
}
// responses
DerValue[] singleResponseDer = seqDerIn.getSequence(1);
singleResponseMap = new HashMap<>(singleResponseDer.length);
if (debug != null) {
debug.println("OCSP number of SingleResponses: " + singleResponseDer.length);
}
for (int i = 0; i < singleResponseDer.length; i++) {
SingleResponse singleResponse = new SingleResponse(singleResponseDer[i]);
singleResponseMap.put(singleResponse.getCertId(), singleResponse);
}
// responseExtensions
byte[] nonce = null;
if (seqDerIn.available() > 0) {
seq = seqDerIn.getDerValue();
if (seq.isContextSpecific((byte) 1)) {
DerValue[] responseExtDer = seq.data.getSequence(3);
for (int i = 0; i < responseExtDer.length; i++) {
Extension ext = new Extension(responseExtDer[i]);
if (debug != null) {
debug.println("OCSP extension: " + ext);
}
// Only the NONCE extension is recognized
if (ext.getExtensionId().equals((Object) OCSP.NONCE_EXTENSION_OID)) {
nonce = ext.getExtensionValue();
} else if (ext.isCritical()) {
throw new IOException("Unsupported OCSP critical extension: " + ext.getExtensionId());
}
}
}
}
responseNonce = nonce;
// signatureAlgorithmId
sigAlgId = AlgorithmId.parse(seqTmp[1]);
// signature
signature = seqTmp[2].getBitString();
// if seq[3] is available , then it is a sequence of certificates
if (seqTmp.length > 3) {
// certs are available
DerValue seqCert = seqTmp[3];
if (!seqCert.isContextSpecific((byte) 0)) {
throw new IOException(
"Bad encoding in certs element of "
+ "OCSP response: expected ASN.1 context specific tag 0.");
}
DerValue[] derCerts = seqCert.getData().getSequence(3);
certs = new ArrayList<X509CertImpl>(derCerts.length);
try {
for (int i = 0; i < derCerts.length; i++) {
certs.add(new X509CertImpl(derCerts[i].toByteArray()));
}
} catch (CertificateException ce) {
throw new IOException("Bad encoding in X509 Certificate", ce);
}
} else {
certs = Collections.<X509CertImpl>emptyList();
}
}
