Examples of codec.x509.AlgorithmIdentifier

org.apache.harmony.security.x509.AlgorithmIdentifier
This class represents the ASN.1/DER value of the AlgorithmIdentifier defined in Annex D to Recommendation X.509. This structure is extensively used for instance in the PKCS standards of RSA Inc. The ASN.1 definition of this structure is as given below:
```
 AlgorithmIdentifier  ::= SEQUENCE{ algorithm  OBJECT IDENTIFIER, parameters ANY DEFINED BY algorithm OPTIONAL } 
```
For this class to work properly, providers need to define the following algorithm aliases for the {@link java.security.AlgorithmParameters AlgorithmParameters} implementations they provide:
1. AlgorithmParameters.MyAlg = class
2. Alg.Alias.AlgorithmParameters.1.2.3.4 = MyAlg
3. Alg.Alias.AlgorithmParameters.OID.1.2.3.4 = MyAlg
The first property defined the mapping of the JCE compliant standard name of the algorithm to the implementing class. The second provider entry allows mapping OID to those algorithm names while the third allows mapping those names on corresponding OID.
The alias definitions are used by this class in order to find an AlgorithmParameters implementation for the OID embedded in the X.509 AlgorithmIdentifier structure, and to create the OID for a given AlgorithmParameters instances. This is done by means of the {@link JCA JCA}class, which operates on the engine and alias definitions of the installed providers.
@author Volker Roth @version "$Id: AlgorithmIdentifier.java,v 1.3 2004/08/13 11:37:03 pebingerExp $" @see JCA

    public void testGetEncoded() throws IOException {
        // Unizeto CETRUM policy
        String policy = "1.2.3.4.5";
        // SHA1 OID as defined in RFC 3161
        String sha1 = "1.3.14.3.2.26";
        MessageImprint msgImprint = new MessageImprint(new AlgorithmIdentifier(
                sha1), new byte[20]);
        Date genTime = new Date();
        BigInteger nonce = BigInteger.valueOf(1234567890L);
        int[] accuracy = new int[] { 1, 0, 0 };
        GeneralName tsa = new GeneralName(new Name("CN=AnAuthority"));

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     * CertificateList(TBSCertList tbsCertList, AlgorithmIdentifier
     * signatureAlgorithm, byte[] signatureValue) method testing.
     */
    public void testCertificateList() {
        try {
            AlgorithmIdentifier signature = 
                new AlgorithmIdentifier(algOID, algParams);
            Name issuer = new Name(issuerName);
            TBSCertList tbscl = 
                new TBSCertList(signature, issuer, thisUpdate);
            CertificateList cl = 
                new CertificateList(tbscl, signature, new byte[] {0});

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        Object[] issuerAndSerialNumber = new Object[] { new Name("CN=test"),
                BigInteger.TEN.toByteArray() };


        SignerInfo signerInfo = new SignerInfo(1, issuerAndSerialNumber,
                new AlgorithmIdentifier("1.3.14.3.2.26"),// SHA1 OID
                null, new AlgorithmIdentifier("1.2.840.10040.4.1"),// DSA OID
                new byte[] { 0x01 },// signature
                null);


        byte[] encoding = SignerInfo.ASN1.encode(signerInfo);

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    private byte[] getCertEncoding(Name subject, GeneralNames subjectAltNames)
                                                        throws IOException {
        // make the TBSCertificate for Certificate
        int version = 2; //v3
        BigInteger serialNumber = BigInteger.valueOf(555L); 
        AlgorithmIdentifier signature = new AlgorithmIdentifier("1.2.3.44.555");
        Name issuer = new Name("O=Certificate Issuer");
        Validity validity = new Validity(new Date(100000000), 
                                         new Date(200000000));
        SubjectPublicKeyInfo subjectPublicKeyInfo = 
            new SubjectPublicKeyInfo(
                    new AlgorithmIdentifier("1.2.840.113549.1.1.2"), 
                                            new byte[10]);
        boolean[] issuerUniqueID  = new boolean[] 
                    {true, false, true, false, true, false, true, false};
        boolean[] subjectUniqueID = new boolean[]
                    {false, true, false, true, false, true, false, true};

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            }
        }
        if (subjectPublicKeyAlgID  != null) {
            try {
                byte[] encoding = cert.getPublicKey().getEncoded();
                AlgorithmIdentifier ai = ((SubjectPublicKeyInfo) 
                        SubjectPublicKeyInfo.ASN1.decode(encoding))
                        .getAlgorithmIdentifier();
                if (!subjectPublicKeyAlgID.equals(ai.getAlgorithm())) {
                    return false;
                }
            } catch (IOException e) {
                e.printStackTrace();
                return false;

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            }
        }
        if (subjectPublicKeyAlgID  != null) {
            try {
                byte[] encoding = cert.getPublicKey().getEncoded();
                AlgorithmIdentifier ai = ((SubjectPublicKeyInfo) 
                        SubjectPublicKeyInfo.ASN1.decode(encoding))
                        .getAlgorithmIdentifier();
                if (!subjectPublicKeyAlgID.equals(ai.getAlgorithm())) {
                    return false;
                }
            } catch (IOException e) {
                e.printStackTrace();
                return false;

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                    + " is not found in the environment.");
        }
        sigAlgName = sigAlgNameAndOID[0];
        String sigAlgOID = sigAlgNameAndOID[1];


        AlgorithmIdentifier algId = new AlgorithmIdentifier(sigAlgOID);


        // generate a distinguished name using the string
        Name subjectDName = null;
        Name issuerDName = null;
        try {

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            }
        }
        if (subjectPublicKeyAlgID  != null) {
            try {
                byte[] encoding = cert.getPublicKey().getEncoded();
                AlgorithmIdentifier ai = ((SubjectPublicKeyInfo) 
                        SubjectPublicKeyInfo.ASN1.decode(encoding))
                        .getAlgorithmIdentifier();
                if (!subjectPublicKeyAlgID.equals(ai.getAlgorithm())) {
                    return false;
                }
            } catch (IOException e) {
                e.printStackTrace();
                return false;

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                    + " is not found in the environment.");
        }
        sigAlgName = sigAlgNameAndOID[0];
        String sigAlgOID = sigAlgNameAndOID[1];


        AlgorithmIdentifier algId = new AlgorithmIdentifier(sigAlgOID);


        // generate a distinguished name using the string
        Name subjectDName = null;
        Name issuerDName = null;
        try {

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        g = keySpec.getG();


        ThreeIntegerSequence threeInts = new ThreeIntegerSequence(p
                .toByteArray(), q.toByteArray(), g.toByteArray());


        AlgorithmIdentifier ai = new AlgorithmIdentifier(AlgNameMapper
                .map2OID("DSA"), //$NON-NLS-1$
                threeInts.getEncoded());


        y = keySpec.getY();

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