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

                RSAESOAEPparams oaepP = new RSAESOAEPparams((ASN1Sequence)aIn.readObject());
    
                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 = (PSSParameterSpec)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)aIn.readObject());
    
                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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            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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     * Test #1 for <code>MGF1ParameterSpec</code> constructor<br>
     * Assertion: constructs new <code>MGF1ParameterSpec</code>
     * object using valid parameter
     */
    public final void testMGF1ParameterSpec01() {
        new MGF1ParameterSpec(testAlgName);
    }

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     * Test #2 for <code>MGF1ParameterSpec</code> constructor<br>
     * Assertion: <code>NullPointerException</code> if parameter is <code>null</code>
     */
    public final void testMGF1ParameterSpec02() {
        try {
            new MGF1ParameterSpec(null);
            fail("NullPointerException has not been thrown");
        } catch (NullPointerException ok) {
        }
    }

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            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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            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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                String jceDigestAlgorithm = "SHA-1";
                if (digestAlgo != null) {
                    jceDigestAlgorithm = JCEMapper.translateURItoJCEID(digestAlgo);
                }


                MGF1ParameterSpec mgf1ParameterSpec = new MGF1ParameterSpec("SHA-1");
                if (mgfAlgo != null) {
                    if (WSConstants.MGF_SHA224.equals(mgfAlgo)) {
                        mgf1ParameterSpec = new MGF1ParameterSpec("SHA-224");
                    } if (WSConstants.MGF_SHA256.equals(mgfAlgo)) {
                        mgf1ParameterSpec = new MGF1ParameterSpec("SHA-256");
                    } else if (WSConstants.MGF_SHA384.equals(mgfAlgo)) {
                        mgf1ParameterSpec = new MGF1ParameterSpec("SHA-384");
                    } else if (WSConstants.MGF_SHA512.equals(mgfAlgo)) {
                        mgf1ParameterSpec = new MGF1ParameterSpec("SHA-512");
                    }
                }
                
                oaepParameterSpec = 
                    new OAEPParameterSpec(

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                if (digestAlgorithm != null && !"".equals(digestAlgorithm)) {
                    jceDigestAlgorithm = JCEMapper.translateURItoJCEID(digestAlgorithm);
                }


                String mgfAlgorithm = getMGFAlgorithm(elem);
                MGF1ParameterSpec mgfParameterSpec = new MGF1ParameterSpec("SHA-1");
                if (mgfAlgorithm != null) {
                    if (WSConstants.MGF_SHA224.equals(mgfAlgorithm)) {
                        mgfParameterSpec = new MGF1ParameterSpec("SHA-224");
                    } else if (WSConstants.MGF_SHA256.equals(mgfAlgorithm)) {
                        mgfParameterSpec = new MGF1ParameterSpec("SHA-256");
                    } else if (WSConstants.MGF_SHA384.equals(mgfAlgorithm)) {
                        mgfParameterSpec = new MGF1ParameterSpec("SHA-384");
                    } else if (WSConstants.MGF_SHA512.equals(mgfAlgorithm)) {
                        mgfParameterSpec = new MGF1ParameterSpec("SHA-512");
                    }
                }


                PSource.PSpecified pSource = PSource.PSpecified.DEFAULT;
                byte[] pSourceBytes = getPSource(elem);

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