DSSASN1Utils { public static AlgorithmIdentifier getAlgorithmIdentifier(final ASN1Sequence atsHashIndexValue) { if (atsHashIndexValue != null && atsHashIndexValue.size() > 3) { final int algorithmIndex = 0; final ASN1Encodable asn1Encodable = atsHashIndexValue.getObjectAt(algorithmIndex); if (asn1Encodable instanceof ASN1Sequence) { final ASN1Sequence asn1Sequence = (ASN1Sequence) asn1Encodable; return AlgorithmIdentifier.getInstance(asn1Sequence); } else if (asn1Encodable instanceof ASN1ObjectIdentifier) { ASN1ObjectIdentifier derObjectIdentifier = ASN1ObjectIdentifier.getInstance(asn1Encodable); return new AlgorithmIdentifier(derObjectIdentifier); } } return null; } private  DSSASN1Utils(); @SuppressWarnings("unchecked") static T toASN1Primitive(final byte[] bytes); static byte[] getDEREncoded(ASN1Encodable asn1Encodable); static byte[] getBEREncoded(ASN1Encodable asn1Encodable); static byte[] getEncoded(BasicOCSPResp basicOCSPResp); static Date toDate(final ASN1GeneralizedTime asn1Date); static String toString(final ASN1OctetString value); static byte[] getEncoded(final TimeStampToken timeStampToken); static byte[] getEncoded(final CMSSignedData cmsSignedData); static byte[] getDEREncoded(final TimeStampToken timeStampToken); static byte[] getDEREncoded(final CMSSignedData data); static byte[] getDEREncoded(final TimestampBinary timestampBinary); static byte[] getDEREncoded(final byte[] bytes); static ASN1Sequence getAsn1SequenceFromDerOctetString(byte[] bytes); static byte[] getAsn1SignaturePolicyDigest(DigestAlgorithm digestAlgorithm, byte[] policyBytes); static AlgorithmIdentifier getAlgorithmIdentifier(final ASN1Sequence atsHashIndexValue); static AlgorithmIdentifier getAlgorithmIdentifier(DigestAlgorithm digestAlgorithm); static ASN1Sequence getCertificatesHashIndex(final ASN1Sequence atsHashIndexValue); static ASN1Sequence getCRLHashIndex(final ASN1Sequence atsHashIndexValue); static ASN1Sequence getUnsignedAttributesHashIndex(final ASN1Sequence atsHashIndexValue); @SuppressWarnings("unchecked") static List<DEROctetString> getDEROctetStrings(final ASN1Sequence asn1Sequence); static boolean hasIdPkixOcspNoCheckExtension(CertificateToken token); static List<CertificatePolicy> getCertificatePolicies(final CertificateToken certToken); static List<String> getQCStatementsIdList(final CertificateToken certToken); static List<String> getQCTypesIdList(final CertificateToken certToken); static List<String> getQCLegislations(CertificateToken certToken); static byte[] getSki(final CertificateToken certificateToken); static byte[] getSki(final CertificateToken certificateToken, boolean computeIfMissing); static byte[] getAuthorityKeyIdentifier(CertificateToken certificateToken); static byte[] computeSkiFromCert(final CertificateToken certificateToken); static byte[] computeSkiFromCertPublicKey(final PublicKey publicKey); static boolean isSkiEqual(final byte[] ski, final CertificateToken certificateToken); static List<String> getCAAccessLocations(final CertificateToken certificate); static List<String> getOCSPAccessLocations(final CertificateToken certificate); static List<String> getCrlUrls(final CertificateToken certificateToken); static boolean isOCSPSigning(CertificateToken certToken); static boolean isExtendedKeyUsagePresent(CertificateToken certToken, ASN1ObjectIdentifier oid); static X509CertificateHolder getX509CertificateHolder(CertificateToken certToken); static CertificateToken getCertificate(final X509CertificateHolder x509CertificateHolder); static CertificateIdentifier toIssuerSerialInfo(SignerId signerId); static X500Principal toX500Principal(X500Name x500Name); static CertificateIdentifier toCertificateIdentifier(final X500Principal issuerX500Principal, final BigInteger serialNumber, final byte[] ski); static IssuerSerial getIssuerSerial(final CertificateToken certToken); static boolean x500PrincipalAreEquals(final X500Principal firstX500Principal, final X500Principal secondX500Principal); static Map<String, String> get(final X500Principal x500Principal); static X500Principal getNormalizedX500Principal(final X500Principal x500Principal); static String getUtf8String(final X500Principal x500Principal); static String getString(ASN1Encodable attributeValue); static String extractAttributeFromX500Principal(ASN1ObjectIdentifier identifier, X500PrincipalHelper principal); static String getSubjectCommonName(CertificateToken cert); static String getHumanReadableName(CertificateToken cert); static SignerInformation getFirstSignerInformation(final CMSSignedData cms); static boolean isASN1SequenceTag(byte tagByte); static Date getDate(ASN1Encodable encodable); static boolean isEmpty(AttributeTable attributeTable); static AttributeTable emptyIfNull(AttributeTable original); static List<String> getExtendedKeyUsage(CertificateToken certToken); static IssuerSerial getIssuerSerial(byte[] binaries); static CertificateIdentifier toCertificateIdentifier(IssuerSerial issuerAndSerial); static ASN1Sequence getAtsHashIndex(AttributeTable timestampUnsignedAttributes); static ASN1Sequence getAtsHashIndexByVersion(AttributeTable timestampUnsignedAttributes, 
			ASN1ObjectIdentifier atsHashIndexVersionIdentifier); static ASN1ObjectIdentifier getAtsHashIndexVersionIdentifier(AttributeTable timestampUnsignedAttributes); static List<byte[]> getOctetStringForAtsHashIndex(Attribute attribute, ASN1ObjectIdentifier atsHashIndexVersionIdentifier); static ASN1Encodable getAsn1Encodable(AttributeTable unsignedAttributes, ASN1ObjectIdentifier oid); static ASN1Set getAsn1AttributeSet(AttributeTable unsignedAttributes, ASN1ObjectIdentifier oid); static Attribute[] getAsn1Attributes(AttributeTable unsignedAttributes, ASN1ObjectIdentifier oid); static List<TimeStampToken> findArchiveTimeStampTokens(AttributeTable unsignedAttributes); static boolean isArchiveTimeStampToken(Attribute attribute); static boolean isAttributeOfType(Attribute attribute, ASN1ObjectIdentifier asn1ObjectIdentifier); static TimeStampToken getTimeStampToken(Attribute attribute); static CMSSignedData getCMSSignedData(Attribute attribute); static ASN1Encodable getAsn1Encodable(Attribute attribute); static Date getTimeStampTokenGenerationTime(TimeStampToken timeStampToken); static RevocationValues getRevocationValues(ASN1Encodable encodable); static CertificateRef getCertificateRef(OtherCertID otherCertId); static PSD2QcType getPSD2QcStatement(CertificateToken certToken); static List<String> getSubjectAlternativeNames(CertificateToken certToken); static SemanticsIdentifier getSemanticsIdentifier(CertificateToken certToken);  }
@Test public void getAlgorithmIdentifier() { assertNotNull(DSSASN1Utils.getAlgorithmIdentifier(DigestAlgorithm.SHA256)); }