Examples of java.security.spec.X509EncodedKeySpec

java.security.spec.X509EncodedKeySpec
This class represents the ASN.1 encoding of a public key, encoded according to the ASN.1 type SubjectPublicKeyInfo. The SubjectPublicKeyInfo syntax is defined in the X.509 standard as follows:
```
 SubjectPublicKeyInfo ::= SEQUENCE { algorithm AlgorithmIdentifier, subjectPublicKey BIT STRING } 
```
@author Jan Luehe @version 1.22, 11/17/05 @see java.security.Key @see java.security.KeyFactory @see KeySpec @see EncodedKeySpec @see PKCS8EncodedKeySpec @since 1.2

       {
               return new PKCS8EncodedKeySpec(key.getEncoded());
       }
       else if (spec.isAssignableFrom(X509EncodedKeySpec.class) && key.getFormat().equals("X.509"))
       {
               return new X509EncodedKeySpec(key.getEncoded());
       }
       else if (spec.isAssignableFrom(RSAPublicKeySpec.class) && key instanceof RSAPublicKey)
       {
            RSAPublicKey    k = (RSAPublicKey)key;

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    {
        SubjectPublicKeyInfo subjectPKInfo = pkac.getSubjectPublicKeyInfo();
        try
        {
            DERBitString bStr = new DERBitString(subjectPKInfo);
            X509EncodedKeySpec xspec = new X509EncodedKeySpec(bStr.getBytes());
            


            AlgorithmIdentifier keyAlg = subjectPKInfo.getAlgorithmId ();


            KeyFactory factory =

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        String  provider)
        throws NoSuchAlgorithmException, NoSuchProviderException,
                InvalidKeyException
    {
        SubjectPublicKeyInfo    subjectPKInfo = reqInfo.getSubjectPublicKeyInfo();
        X509EncodedKeySpec      xspec = new X509EncodedKeySpec(new DERBitString(subjectPKInfo).getBytes());
        AlgorithmIdentifier     keyAlg = subjectPKInfo.getAlgorithmId();
        
        try
        {
            try

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        if (!vInfo.getAlgorithmId().getParameters().equals(DERNull.INSTANCE))
        {
            fail("public key parameters wrong");
        }
        
        ECPublicKey vKey = (ECPublicKey)kFact.generatePublic(new X509EncodedKeySpec(bytes));


        if (!vKey.equals(pubKey) || vKey.hashCode() != pubKey.hashCode())
        {
            fail("public equals/hashCode failed");
        }

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        //
        // public key encoding test
        //
        byte[]              pubEnc = aKeyPair.getPublic().getEncoded();
        KeyFactory          keyFac = KeyFactory.getInstance("DH", "BC");
        X509EncodedKeySpec  pubX509 = new X509EncodedKeySpec(pubEnc);
        DHPublicKey         pubKey = (DHPublicKey)keyFac.generatePublic(pubX509);
        DHParameterSpec     spec = pubKey.getParams();


        if (!spec.getG().equals(dhParams.getG()) || !spec.getP().equals(dhParams.getP()))
        {

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        //
        // public key encoding test
        //
        byte[]              pubEnc = aKeyPair.getPublic().getEncoded();
        KeyFactory          keyFac = KeyFactory.getInstance(algorithm, "BC");
        X509EncodedKeySpec  pubX509 = new X509EncodedKeySpec(pubEnc);
        ECPublicKey         pubKey = (ECPublicKey)keyFac.generatePublic(pubX509);


        if (!pubKey.getW().equals(((ECPublicKey)aKeyPair.getPublic()).getW()))
        {
            System.out.println(" expected " + pubKey.getW().getAffineX() + " got " + ((ECPublicKey)aKeyPair.getPublic()).getW().getAffineX());

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        //
        // encoded test
        //
        KeyFactory f = KeyFactory.getInstance("GOST3410", "BC");


        X509EncodedKeySpec  x509s = new X509EncodedKeySpec(vKey.getEncoded());
        GOST3410PublicKey   k1 = (GOST3410PublicKey)f.generatePublic(x509s);


        if (!k1.getY().equals(((GOST3410PublicKey)vKey).getY()))
        {
            fail("public number not decoded properly");

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            {
                KeyFactory kf = KeyFactory.getInstance(wrappedKeyAlgorithm, "BC");


                if (wrappedKeyType == Cipher.PUBLIC_KEY)
                {
                    return kf.generatePublic(new X509EncodedKeySpec(encoded));
                }
                else if (wrappedKeyType == Cipher.PRIVATE_KEY)
                {
                    return kf.generatePrivate(new PKCS8EncodedKeySpec(encoded));
                }

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        //
        // public key encoding test
        //
        byte[]                  pubEnc = keyPair.getPublic().getEncoded();
        KeyFactory              keyFac = KeyFactory.getInstance("ElGamal", "BC");
        X509EncodedKeySpec      pubX509 = new X509EncodedKeySpec(pubEnc);
        DHPublicKey             pubKey = (DHPublicKey)keyFac.generatePublic(pubX509);
        DHParameterSpec         spec = pubKey.getParams();


        if (!spec.getG().equals(elParams.getG()) || !spec.getP().equals(elParams.getP()))
        {

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        //
        // double public key encoding test
        //
        byte[]              pubEnc = pubKey.getEncoded();
        KeyFactory          keyFac = KeyFactory.getInstance(pubKey.getAlgorithm(), "BC");
        X509EncodedKeySpec  pubX509 = new X509EncodedKeySpec(pubEnc);


        pubKey = (PublicKey)keyFac.generatePublic(pubX509);


        pubEnc = pubKey.getEncoded();
        keyFac = KeyFactory.getInstance(pubKey.getAlgorithm(), "BC");
        pubX509 = new X509EncodedKeySpec(pubEnc);


        pubKey = (PublicKey)keyFac.generatePublic(pubX509);


        //
        // double private key encoding test

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