Examples of java.security.spec.PKCS8EncodedKeySpec

java.security.spec.PKCS8EncodedKeySpec
This class represents the ASN.1 encoding of a private key, encoded according to the ASN.1 type PrivateKeyInfo. The PrivateKeyInfo syntax is defined in the PKCS#8 standard as follows:
```
 PrivateKeyInfo ::= SEQUENCE { version Version, privateKeyAlgorithm PrivateKeyAlgorithmIdentifier, privateKey PrivateKey, attributes [0] IMPLICIT Attributes OPTIONAL } Version ::= INTEGER PrivateKeyAlgorithmIdentifier ::= AlgorithmIdentifier PrivateKey ::= OCTET STRING Attributes ::= SET OF Attribute 
```
@author Jan Luehe @version 1.22, 11/17/05 @see java.security.Key @see java.security.KeyFactory @see KeySpec @see EncodedKeySpec @see X509EncodedKeySpec @since 1.2

                {
                    return kf.generatePublic(new X509EncodedKeySpec(encoded));
                }
                else if (wrappedKeyType == Cipher.PRIVATE_KEY)
                {
                    return kf.generatePrivate(new PKCS8EncodedKeySpec(encoded));
                }
            }
            catch (NoSuchProviderException e)
            {
                throw new InvalidKeyException("Unknown key type " + e.getMessage());

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        dIn.readFully(enc);


        if (format.equals("PKCS#8") || format.equals("PKCS8"))
        {
            spec = new PKCS8EncodedKeySpec(enc);
        }
        else if (format.equals("X.509") || format.equals("X509"))
        {
            spec = new X509EncodedKeySpec(enc);
        }

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        DSAPublicKey        k1 = (DSAPublicKey)f.generatePublic(x509s);


        checkPublic(k1, vKey);
        
        PKCS8EncodedKeySpec  pkcs8 = new PKCS8EncodedKeySpec(sKey.getEncoded());


        DSAPrivateKey        k2 = (DSAPrivateKey)f.generatePrivate(pkcs8);


        checkPrivateKey(k2, sKey);
        
        //
        // key decoding test - SUN decoding BC keys
        // 
        f = KeyFactory.getInstance("DSA", "SUN");
        x509s = new X509EncodedKeySpec(k1.getEncoded());
        
        vKey = (DSAPublicKey)f.generatePublic(x509s);


        checkPublic(k1, vKey);
        
        pkcs8 = new PKCS8EncodedKeySpec(k2.getEncoded());
        sKey = f.generatePrivate(pkcs8);


        checkPrivateKey(k2, sKey);
    }

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        //
        // private key encoding test
        //
        byte[]              privEnc = aKeyPair.getPrivate().getEncoded();
        PKCS8EncodedKeySpec privPKCS8 = new PKCS8EncodedKeySpec(privEnc);
        ECPrivateKey        privKey = (ECPrivateKey)keyFac.generatePrivate(privPKCS8);


        if (!privKey.getS().equals(((ECPrivateKey)aKeyPair.getPrivate()).getS()))
        {
            fail("private key encoding (S test) failed");

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        //
        // private key encoding test
        //
        byte[]              privEnc = sKey.getEncoded();
        PKCS8EncodedKeySpec privPKCS8 = new PKCS8EncodedKeySpec(privEnc);
        ECPrivateKey        privKey = (ECPrivateKey)keyFac.generatePrivate(privPKCS8);


        if (!privKey.getS().equals(((ECPrivateKey)sKey).getS()))
        {
            fail("private key encoding (S test) failed");

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        //
        // private key encoding test
        //
        byte[]              privEnc = sKey.getEncoded();
        PKCS8EncodedKeySpec privPKCS8 = new PKCS8EncodedKeySpec(privEnc);
        ECPrivateKey        privKey = (ECPrivateKey)keyFac.generatePrivate(privPKCS8);


        if (!privKey.getS().equals(((ECPrivateKey)sKey).getS()))
        {
            fail("GOST private key encoding (S test) failed");

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        boolean samePrivate = Arrays.equals(keys.getPrivate()
            .getEncoded(), privateKey.getEncoded());
        assertTrue(
            "generatePrivate generated different key for algorithm "
                + keyfactAlgs[i], samePrivate);
        fact.generatePrivate(new PKCS8EncodedKeySpec(keys.getPrivate()
            .getEncoded()));
      } catch (InvalidKeySpecException e) {
        fail("invalid key spec for algorithm " + keyfactAlgs[i]);
      } catch (NoSuchAlgorithmException e) {
        fail("getInstance did not find algorithm " + keyfactAlgs[i]);

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    }


    public static void importPKCS8CertChain(KeyStore ks, String alias, byte[] keyBytes, String keyPass, byte[] certChain) throws InvalidKeySpecException, NoSuchAlgorithmException, CertificateException, KeyStoreException {
        // load the private key
        KeyFactory kf = KeyFactory.getInstance("RSA");
        PKCS8EncodedKeySpec keysp = new PKCS8EncodedKeySpec(keyBytes);
        PrivateKey pk = kf.generatePrivate(keysp);


        // load the cert chain
        CertificateFactory cf = CertificateFactory.getInstance("X.509");
        ByteArrayInputStream bais = new ByteArrayInputStream(certChain);

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            NamingException ne = new NamingException( I18n.err( I18n.ERR_288, ALGORITHM ) );
            ne.setRootCause( e );
            throw ne;
        }
        
        EncodedKeySpec privateKeySpec = new PKCS8EncodedKeySpec( entry.get( PRIVATE_KEY_AT ).getBytes() );
        try
        {
            privateKey = keyFactory.generatePrivate( privateKeySpec );
        }
        catch ( Exception e )

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        String data = new UsageStatistics(publicKey).getStatData();
        System.out.println(data);


        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        RSAPrivateKey priv = (RSAPrivateKey)keyFactory.generatePrivate(new PKCS8EncodedKeySpec(Util.fromHexString(privateKey)));


        byte[] cipherText = Base64.decode(data.toCharArray());
        InputStreamReader r = new InputStreamReader(new GZIPInputStream(
                new CombinedCipherInputStream(new ByteArrayInputStream(cipherText),priv,"AES")), "UTF-8");
        JSONObject o = JSONObject.fromObject(IOUtils.toString(r));

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