private void readOAEPParameters(OAEPParameterSpec spec) throws InvalidAlgorithmParameterException { String mgfAlgUpper = spec.getMGFAlgorithm().toUpperCase(Locale.US); AlgorithmParameterSpec mgfSpec = spec.getMGFParameters(); if ((!EvpMdRef.MGF1_ALGORITHM_NAME.equals(mgfAlgUpper) && !EvpMdRef.MGF1_OID.equals(mgfAlgUpper)) || !(mgfSpec instanceof MGF1ParameterSpec)) { throw new InvalidAlgorithmParameterException( "Only MGF1 supported as mask generation function"); } MGF1ParameterSpec mgf1spec = (MGF1ParameterSpec) mgfSpec; String oaepAlgUpper = spec.getDigestAlgorithm().toUpperCase(Locale.US); try { oaepMd = EvpMdRef.getEVP_MDByJcaDigestAlgorithmStandardName(oaepAlgUpper); oaepMdSizeBytes = EvpMdRef.getDigestSizeBytesByJcaDigestAlgorithmStandardName(oaepAlgUpper); mgf1Md = EvpMdRef.getEVP_MDByJcaDigestAlgorithmStandardName( mgf1spec.getDigestAlgorithm()); } catch (NoSuchAlgorithmException e) { throw new InvalidAlgorithmParameterException(e); } PSource pSource = spec.getPSource(); if (!"PSpecified".equals(pSource.getAlgorithm()) || !(pSource instanceof PSource.PSpecified)) { throw new InvalidAlgorithmParameterException( "Only PSpecified accepted for PSource"); } label = ((PSource.PSpecified) pSource).getValue(); }
private void readOAEPParameters(OAEPParameterSpec spec) throws InvalidAlgorithmParameterException { String mgfAlgUpper = spec.getMGFAlgorithm().toUpperCase(Locale.US); AlgorithmParameterSpec mgfSpec = spec.getMGFParameters(); if ((!EvpMdRef.MGF1_ALGORITHM_NAME.equals(mgfAlgUpper) && !EvpMdRef.MGF1_OID.equals(mgfAlgUpper)) || !(mgfSpec instanceof MGF1ParameterSpec)) { throw new InvalidAlgorithmParameterException( "Only MGF1 supported as mask generation function"); } MGF1ParameterSpec mgf1spec = (MGF1ParameterSpec) mgfSpec; String oaepAlgUpper = spec.getDigestAlgorithm().toUpperCase(Locale.US); try { oaepMd = EvpMdRef.getEVP_MDByJcaDigestAlgorithmStandardName(oaepAlgUpper); oaepMdSizeBytes = EvpMdRef.getDigestSizeBytesByJcaDigestAlgorithmStandardName(oaepAlgUpper); mgf1Md = EvpMdRef.getEVP_MDByJcaDigestAlgorithmStandardName( mgf1spec.getDigestAlgorithm()); } catch (NoSuchAlgorithmException e) { throw new InvalidAlgorithmParameterException(e); } PSource pSource = spec.getPSource(); if (!"PSpecified".equals(pSource.getAlgorithm()) || !(pSource instanceof PSource.PSpecified)) { throw new InvalidAlgorithmParameterException( "Only PSpecified accepted for PSource"); } label = ((PSource.PSpecified) pSource).getValue(); }
private static AlgorithmIdentifier extractFromSpec(AlgorithmParameterSpec algorithmParameterSpec) { if (algorithmParameterSpec instanceof OAEPParameterSpec) { OAEPParameterSpec oaepSpec = (OAEPParameterSpec)algorithmParameterSpec; if (oaepSpec.getMGFAlgorithm().equals(OAEPParameterSpec.DEFAULT.getMGFAlgorithm())) { if (oaepSpec.getPSource() instanceof PSource.PSpecified) { return new AlgorithmIdentifier(PKCSObjectIdentifiers.id_RSAES_OAEP, new RSAESOAEPparams(getDigest(oaepSpec.getDigestAlgorithm()), new AlgorithmIdentifier(PKCSObjectIdentifiers.id_mgf1, getDigest(((MGF1ParameterSpec)oaepSpec.getMGFParameters()).getDigestAlgorithm())), new AlgorithmIdentifier(PKCSObjectIdentifiers.id_pSpecified, new DEROctetString(((PSource.PSpecified)oaepSpec.getPSource()).getValue())))); } else { throw new IllegalArgumentException("unknown PSource: " + oaepSpec.getPSource().getAlgorithm()); } } else { throw new IllegalArgumentException("unknown MGF: " + oaepSpec.getMGFAlgorithm()); } } throw new IllegalArgumentException("unknown spec: " + algorithmParameterSpec.getClass().getName()); }