Examples of DERDecoder

codec.asn1.DERDecoder
Decodes ASN.1/DER encoded types according to the rules set forth in ITU-T Recommendation X.690.
Decoders can be operated in two modi. The first mode just reads any ASN.1 type encountered in a stream and returns the instantiated objects. This mode is used if for instance method {@link #readType() readType()}is called.
The second mode matches the decoded data against an application-specified ASN.1 structure. Violations of the structure definition causes an exception being thrown. @author Volker Roth @author Stefan Endler @version "$Id: DERDecoder.java,v 1.3 2007/08/11 18:21:50 sendler Exp $"

Examples of codec.asn1.DERDecoder

     * extension did not contain a DER encoded ASN.1 type, the ASN1OctetString
     * containing the original value is returned.
     */
    public Object getValue() {
  ByteArrayInputStream bis;
  DERDecoder dec;
  ASN1Type res = null;


  try {
      bis = new ByteArrayInputStream(extnValue.getByteArray());
      dec = new DERDecoder(bis);
      res = dec.readType();
      dec.close();
  } catch (IOException e) {
      System.err.println("Internal error: shouldn't happen!");
      e.printStackTrace();
  } catch (ASN1Exception e) {
      res = extnValue;

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Examples of codec.asn1.DERDecoder

     * template. This implicitly checks the syntax of the decoded type.
     */
    protected void decodeExtensionValue(ASN1Type t) throws ASN1Exception,
      IOException {
  ByteArrayInputStream bis;
  DERDecoder dec;


  if (t == null) {
      throw new NullPointerException("input parameter");
  }
  bis = new ByteArrayInputStream(extnValue.getByteArray());
  dec = new DERDecoder(bis);


  t.decode(dec);
  dec.close();
    }

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Examples of codec.asn1.DERDecoder

     * @throws IOException DOCUMENT ME!
     */
    public void decode(byte[] encodedData) throws ASN1Exception, IOException
    {
        ByteArrayInputStream in;
        DERDecoder decoder;


        in          = new ByteArrayInputStream(encodedData);
        decoder     = new DERDecoder(in);


        this.decode(decoder);
        decoder.close();
    }

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Examples of codec.asn1.DERDecoder

     * @throws IOException DOCUMENT ME!
     */
    public void decode(byte[] encodedData) throws ASN1Exception, IOException
    {
        ByteArrayInputStream in;
        DERDecoder decoder;


        in          = new ByteArrayInputStream(encodedData);
        decoder     = new DERDecoder(in);


        this.decode(decoder);
        decoder.close();
    }

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Examples of codec.asn1.DERDecoder

     * @throws IOException DOCUMENT ME!
     */
    public void decode(byte[] encodedData) throws ASN1Exception, IOException
    {
        ByteArrayInputStream in;
        DERDecoder decoder;


        in          = new ByteArrayInputStream(encodedData);
        decoder     = new DERDecoder(in);


        this.decode(decoder);
        decoder.close();
    }

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Examples of codec.asn1.DERDecoder

     *          null if the extension is not present
     */
    public int getBasicConstraints() {
  int res = -1;
  byte[] ext_value;
  DERDecoder dec;
  ByteArrayInputStream bais;
  ASN1Sequence seq;
  ASN1Integer pathLen;
  ASN1Boolean ca;


  String bc_oid = "2.5.29.19";


  // get the extension "basic constraints"
  ext_value = getExtensionValue(bc_oid);


  // is it present?
  if (ext_value != null) {


      // read the extension value through a byte array input stream
      bais = new ByteArrayInputStream(ext_value);


      try {


    // build outer sequence
    seq = new ASN1Sequence();


    ca = new ASN1Boolean();
    ca.setOptional(true);
    seq.add(ca);


    pathLen = new ASN1Integer();
    pathLen.setOptional(true);
    seq.add(pathLen);


    /*
     * Switched decoding to the correct way of doing it, which is to
     * take the ASN.1 object and to call its decode() method, rather
     * than calling readX() methods of the decoder. --volker roth
     */
    dec = new DERDecoder(bais);
    seq.decode(dec);
    bais.close();


    if (ca.isTrue()) {
        /*

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Examples of codec.asn1.DERDecoder

     *          null.
     */
    public boolean[] getKeyUsage() {
  boolean[] res = null;
  byte[] ext_value;
  DERDecoder dec;
  ByteArrayInputStream bais;
  ASN1BitString bits;


  String ku_oid = "2.5.29.15";


  // get the extension "key usage"
  ext_value = getExtensionValue(ku_oid);


  // is it present?
  if (ext_value != null) {


      // read the extension value through a byte array input stream
      bais = new ByteArrayInputStream(ext_value);


      try {


    // build outer sequence
    bits = new ASN1BitString();


    dec = new DERDecoder(bais);


    /*
     * Replaced the construct dec.readX(X) by the correct use of
     * X.decode(dec). The latter takes into consideration any
     * special decoding steps (such as optimizations) done by the

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Examples of codec.asn1.DERDecoder

     * @throws IOException DOCUMENT ME!
     */
    public void decode(byte[] encodedData) throws ASN1Exception, IOException
    {
        ByteArrayInputStream in;
        DERDecoder decoder;


        /* Initialize input stream containing the encoded data.
         */
        in     = new ByteArrayInputStream(encodedData);


        /* Initialize decoder instance with this input stream.
         */
        decoder = new DERDecoder(in);


        /* Decode the data in the input stream and stored it in the member
         * variables of this class that represent the components of the
         * corresponding ASN.1 type.
         */
        this.decode(decoder);


        /* Close the stream.
         */
        decoder.close();
    }

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Examples of codec.asn1.DERDecoder

     * @throws IOException DOCUMENT ME!
     */
    public void decode(byte[] encodedData) throws ASN1Exception, IOException
    {
        ByteArrayInputStream in;
        DERDecoder decoder;


        in          = new ByteArrayInputStream(encodedData);
        decoder     = new DERDecoder(in);


        this.decode(decoder);
        decoder.close();
    }

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Examples of codec.asn1.DERDecoder

     * Constructor on an input stream that delivers the DER-encoded certificate
     * revocation list.
     */
    public X509Crl(InputStream is) throws ASN1Exception, IOException {
  this();
  this.decode(new DERDecoder(is));
    }

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