Example usage for org.bouncycastle.asn1 DERTaggedObject toASN1Object

Introduction

In this page you can find the example usage for org.bouncycastle.asn1 DERTaggedObject toASN1Object.

Prototype

public ASN1Primitive toASN1Object() 

Source Link

Usage

From source file:org.apache.http.contrib.auth.BouncySpnegoTokenGenerator.java

License:Apache License

public byte[] generateSpnegoDERObject(byte[] kerbTicket) throws IOException {
    DEROctetString ourKerberosTicket = new DEROctetString(kerbTicket);

    DERSequence kerbOidSeq = new DERSequence(kerbOid);
    DERTaggedObject tagged0 = new DERTaggedObject(0, kerbOidSeq);
    DERTaggedObject tagged2 = new DERTaggedObject(2, ourKerberosTicket);
    ASN1EncodableVector v = new ASN1EncodableVector();
    v.add(tagged0);//from   w ww.jav a2  s .com
    v.add(tagged2);
    DERSequence seq = new DERSequence(v);
    DERTaggedObject taggedSpnego = new DERTaggedObject(0, seq);

    ByteArrayOutputStream out = new ByteArrayOutputStream();
    ASN1OutputStream asn1Out = new ASN1OutputStream(out);

    ASN1Object spnegoOIDASN1 = (ASN1Object) spnegoOid.toASN1Object();
    ASN1Object taggedSpnegoASN1 = (ASN1Object) taggedSpnego.toASN1Object();

    int length = spnegoOIDASN1.getDEREncoded().length + taggedSpnegoASN1.getDEREncoded().length;
    byte[] lenBytes = writeLength(length);
    byte[] appWrap = new byte[lenBytes.length + 1];

    appWrap[0] = 0x60;
    for (int i = 1; i < appWrap.length; i++) {
        appWrap[i] = lenBytes[i - 1];
    }

    asn1Out.write(appWrap);
    asn1Out.writeObject(spnegoOid.toASN1Object());
    asn1Out.writeObject(taggedSpnego.toASN1Object());

    byte[] app = out.toByteArray();
    ASN1InputStream in = new ASN1InputStream(app);

    if (log.isDebugEnabled()) {
        int skip = 12;
        byte[] manipBytes = new byte[app.length - skip];
        for (int i = skip; i < app.length; i++) {
            manipBytes[i - skip] = app[i];
        }
        ASN1InputStream ourSpnego = new ASN1InputStream(manipBytes);
        log.debug(ASN1Dump.dumpAsString(ourSpnego.readObject()));
    }

    return in.readObject().getDEREncoded();
}

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