Examples of java.security.spec.MGF1ParameterSpec

java.security.spec.MGF1ParameterSpec

etf.org/rfc/rfc3447.txt">PKCS #1 v2.1 standard.

Its ASN.1 definition in PKCS#1 standard is described below:

 MGF1Parameters ::= OAEP-PSSDigestAlgorthms

where

 OAEP-PSSDigestAlgorithms    ALGORITHM-IDENTIFIER ::= { { OID id-sha1 PARAMETERS NULL   }| { OID id-sha256 PARAMETERS NULL }| { OID id-sha384 PARAMETERS NULL }| { OID id-sha512 PARAMETERS NULL }, ...  -- Allows for future expansion -- }

@see PSSParameterSpec @see javax.crypto.spec.OAEPParameterSpec @author Valerie Peng @version 1.5, 07/20/06 @since 1.5

            PSource.PSpecified pSource = PSource.PSpecified.DEFAULT;
            if (oaepParams != null) {
                pSource = new PSource.PSpecified(oaepParams);
            }
            
            MGF1ParameterSpec mgfParameterSpec = new MGF1ParameterSpec("SHA-1");
            if (XMLCipher.RSA_OAEP_11.equals(encryptionAlgorithm)) {
                if (EncryptionConstants.MGF1_SHA256.equals(mgfAlgorithm)) {
                    mgfParameterSpec = new MGF1ParameterSpec("SHA-256");
                } else if (EncryptionConstants.MGF1_SHA384.equals(mgfAlgorithm)) {
                    mgfParameterSpec = new MGF1ParameterSpec("SHA-384");
                } else if (EncryptionConstants.MGF1_SHA512.equals(mgfAlgorithm)) {
                    mgfParameterSpec = new MGF1ParameterSpec("SHA-512");
                }
            }
            return new OAEPParameterSpec(jceDigestAlgorithm, "MGF1", mgfParameterSpec, pSource);
        }

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        try {
            OAEPParameterSpec oaepParameterSpec = null;
            if (WSConstants.KEYTRANSPORT_RSAOEP.equals(keyEncAlgo)) {
                oaepParameterSpec = 
                    new OAEPParameterSpec(
                        "SHA-1", "MGF1", new MGF1ParameterSpec("SHA-1"), PSource.PSpecified.DEFAULT
                    );
            }
            if (oaepParameterSpec == null) {
                cipher.init(Cipher.WRAP_MODE, remoteCert);
            } else {

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            PrivateKey privateKey = data.getDecCrypto().getPrivateKey(certs[0], data.getCallbackHandler());
            OAEPParameterSpec oaepParameterSpec = null;
            if (WSConstants.KEYTRANSPORT_RSAOEP.equals(encryptedKeyTransportMethod)) {
                oaepParameterSpec = 
                    new OAEPParameterSpec(
                        "SHA-1", "MGF1", new MGF1ParameterSpec("SHA-1"), PSource.PSpecified.DEFAULT
                    );
            }
            if (oaepParameterSpec == null) {
                cipher.init(Cipher.DECRYPT_MODE, privateKey);
            } else {

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        protected byte[] engineGetEncoded() 
        {
            AlgorithmIdentifier     hashAlgorithm = new AlgorithmIdentifier(
                                                            JCEDigestUtil.getOID(currentSpec.getDigestAlgorithm()),
                                                            new DERNull());
            MGF1ParameterSpec       mgfSpec = (MGF1ParameterSpec)currentSpec.getMGFParameters();
            AlgorithmIdentifier     maskGenAlgorithm = new AlgorithmIdentifier(
                                                            PKCSObjectIdentifiers.id_mgf1, 
                                                            new AlgorithmIdentifier(JCEDigestUtil.getOID(mgfSpec.getDigestAlgorithm()), new DERNull()));
            PSource.PSpecified      pSource = (PSource.PSpecified)currentSpec.getPSource();
            AlgorithmIdentifier     pSourceAlgorithm = new AlgorithmIdentifier(
                                                            PKCSObjectIdentifiers.id_pSpecified, new DEROctetString(pSource.getValue()));
            RSAESOAEPparams         oaepP = new RSAESOAEPparams(hashAlgorithm, maskGenAlgorithm, pSourceAlgorithm);

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                RSAESOAEPparams oaepP = new RSAESOAEPparams((ASN1Sequence)ASN1Object.fromByteArray(params));


                currentSpec = new OAEPParameterSpec(
                                       oaepP.getHashAlgorithm().getObjectId().getId(), 
                                       oaepP.getMaskGenAlgorithm().getObjectId().getId(), 
                                       new MGF1ParameterSpec(AlgorithmIdentifier.getInstance(oaepP.getMaskGenAlgorithm().getParameters()).getObjectId().getId()),
                                       new PSource.PSpecified(ASN1OctetString.getInstance(oaepP.getPSourceAlgorithm().getParameters()).getOctets()));
            }
            catch (ClassCastException e)
            {
                throw new IOException("Not a valid OAEP Parameter encoding.");

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        {
            PSSParameterSpec    pssSpec = currentSpec;
            AlgorithmIdentifier hashAlgorithm = new AlgorithmIdentifier(
                                                JCEDigestUtil.getOID(pssSpec.getDigestAlgorithm()),
                                                new DERNull());
            MGF1ParameterSpec   mgfSpec = (MGF1ParameterSpec)pssSpec.getMGFParameters();
            AlgorithmIdentifier maskGenAlgorithm = new AlgorithmIdentifier(
                                                PKCSObjectIdentifiers.id_mgf1, 
                                                new AlgorithmIdentifier(JCEDigestUtil.getOID(mgfSpec.getDigestAlgorithm()), new DERNull()));
            RSASSAPSSparams     pssP = new RSASSAPSSparams(hashAlgorithm, maskGenAlgorithm, new DERInteger(pssSpec.getSaltLength()), new DERInteger(pssSpec.getTrailerField()));
            
            return pssP.getEncoded("DER");
        }

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                RSASSAPSSparams pssP = new RSASSAPSSparams((ASN1Sequence)ASN1Object.fromByteArray(params));


                currentSpec = new PSSParameterSpec(
                                       pssP.getHashAlgorithm().getObjectId().getId(), 
                                       pssP.getMaskGenAlgorithm().getObjectId().getId(), 
                                       new MGF1ParameterSpec(AlgorithmIdentifier.getInstance(pssP.getMaskGenAlgorithm().getParameters()).getObjectId().getId()),
                                       pssP.getSaltLength().getValue().intValue(),
                                       pssP.getTrailerField().getValue().intValue());
            }
            catch (ClassCastException e)
            {

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    private void initFromSpec(
        OAEPParameterSpec pSpec) 
        throws NoSuchPaddingException
    {
        MGF1ParameterSpec   mgfParams = (MGF1ParameterSpec)pSpec.getMGFParameters();
        Digest              digest = JCEDigestUtil.getDigest(mgfParams.getDigestAlgorithm());
        
        if (digest == null)
        {
            throw new NoSuchPaddingException("no match on OAEP constructor for digest algorithm: "+ mgfParams.getDigestAlgorithm());
        }


        cipher = new OAEPEncoding(new RSABlindedEngine(), digest, ((PSource.PSpecified)pSpec.getPSource()).getValue());
        paramSpec = pSpec;
    }

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        {
            cipher = new ISO9796d1Encoding(new RSABlindedEngine());
        }
        else if (pad.equals("OAEPWITHMD5ANDMGF1PADDING"))
        {
            initFromSpec(new OAEPParameterSpec("MD5", "MGF1", new MGF1ParameterSpec("MD5"), PSource.PSpecified.DEFAULT));
        }
        else if (pad.equals("OAEPPADDING"))
        {
            initFromSpec(OAEPParameterSpec.DEFAULT);
        }
        else if (pad.equals("OAEPWITHSHA1ANDMGF1PADDING") || pad.equals("OAEPWITHSHA-1ANDMGF1PADDING"))
        {
            initFromSpec(OAEPParameterSpec.DEFAULT);
        }
        else if (pad.equals("OAEPWITHSHA224ANDMGF1PADDING") || pad.equals("OAEPWITHSHA-224ANDMGF1PADDING"))
        {
            initFromSpec(new OAEPParameterSpec("SHA-224", "MGF1", new MGF1ParameterSpec("SHA-224"), PSource.PSpecified.DEFAULT));
        }
        else if (pad.equals("OAEPWITHSHA256ANDMGF1PADDING") || pad.equals("OAEPWITHSHA-256ANDMGF1PADDING"))
        {
            initFromSpec(new OAEPParameterSpec("SHA-256", "MGF1", MGF1ParameterSpec.SHA256, PSource.PSpecified.DEFAULT));
        }

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                if (digest == null)
                {
                    throw new InvalidAlgorithmParameterException("no match on digest algorithm: "+ spec.getDigestAlgorithm());
                }


                MGF1ParameterSpec mgfParams = (MGF1ParameterSpec)spec.getMGFParameters();
                Digest mgfDigest = JCEDigestUtil.getDigest(mgfParams.getDigestAlgorithm());
                
                if (mgfDigest == null)
                {
                    throw new InvalidAlgorithmParameterException("no match on MGF digest algorithm: "+ mgfParams.getDigestAlgorithm());
                }
                
                cipher = new OAEPEncoding(new RSABlindedEngine(), digest, mgfDigest, ((PSource.PSpecified)spec.getPSource()).getValue());
            }
        }

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