using Org.BouncyCastle.Asn1.X509; using System.Collections.Generic; namespace Org.BouncyCastle.Asn1.Cms { public class SignerInfo : Asn1Encodable { private DerInteger version; private SignerIdentifier sid; private AlgorithmIdentifier digAlgorithm; private Asn1Set authenticatedAttributes; private AlgorithmIdentifier digEncryptionAlgorithm; private Asn1OctetString encryptedDigest; private Asn1Set unauthenticatedAttributes; public DerInteger Version => version; public SignerIdentifier SignerID => sid; public Asn1Set AuthenticatedAttributes => authenticatedAttributes; public AlgorithmIdentifier DigestAlgorithm => digAlgorithm; public Asn1OctetString EncryptedDigest => encryptedDigest; public AlgorithmIdentifier DigestEncryptionAlgorithm => digEncryptionAlgorithm; public Asn1Set UnauthenticatedAttributes => unauthenticatedAttributes; public static SignerInfo GetInstance(object obj) { if (obj == null) return null; SignerInfo signerInfo = obj as SignerInfo; if (signerInfo != null) return signerInfo; return new SignerInfo(Asn1Sequence.GetInstance(obj)); } public static SignerInfo GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit) { return new SignerInfo(Asn1Sequence.GetInstance(taggedObject, declaredExplicit)); } public SignerInfo(SignerIdentifier sid, AlgorithmIdentifier digAlgorithm, Asn1Set authenticatedAttributes, AlgorithmIdentifier digEncryptionAlgorithm, Asn1OctetString encryptedDigest, Asn1Set unauthenticatedAttributes) { version = new DerInteger((!sid.IsTagged) ? 1 : 3); this.sid = sid; this.digAlgorithm = digAlgorithm; this.authenticatedAttributes = authenticatedAttributes; this.digEncryptionAlgorithm = digEncryptionAlgorithm; this.encryptedDigest = encryptedDigest; this.unauthenticatedAttributes = unauthenticatedAttributes; } public SignerInfo(SignerIdentifier sid, AlgorithmIdentifier digAlgorithm, Attributes authenticatedAttributes, AlgorithmIdentifier digEncryptionAlgorithm, Asn1OctetString encryptedDigest, Attributes unauthenticatedAttributes) { version = new DerInteger((!sid.IsTagged) ? 1 : 3); this.sid = sid; this.digAlgorithm = digAlgorithm; this.authenticatedAttributes = Asn1Set.GetInstance(authenticatedAttributes); this.digEncryptionAlgorithm = digEncryptionAlgorithm; this.encryptedDigest = encryptedDigest; this.unauthenticatedAttributes = Asn1Set.GetInstance(unauthenticatedAttributes); } private SignerInfo(Asn1Sequence seq) { IEnumerator<Asn1Encodable> enumerator = seq.GetEnumerator(); enumerator.MoveNext(); version = (DerInteger)enumerator.Current; enumerator.MoveNext(); sid = SignerIdentifier.GetInstance(enumerator.Current.ToAsn1Object()); enumerator.MoveNext(); digAlgorithm = AlgorithmIdentifier.GetInstance(enumerator.Current.ToAsn1Object()); enumerator.MoveNext(); Asn1Object asn1Object = enumerator.Current.ToAsn1Object(); Asn1TaggedObject asn1TaggedObject = asn1Object as Asn1TaggedObject; if (asn1TaggedObject != null) { authenticatedAttributes = Asn1Set.GetInstance(asn1TaggedObject, false); enumerator.MoveNext(); digEncryptionAlgorithm = AlgorithmIdentifier.GetInstance(enumerator.Current.ToAsn1Object()); } else { authenticatedAttributes = null; digEncryptionAlgorithm = AlgorithmIdentifier.GetInstance(asn1Object); } enumerator.MoveNext(); encryptedDigest = Asn1OctetString.GetInstance(enumerator.Current.ToAsn1Object()); if (enumerator.MoveNext()) unauthenticatedAttributes = Asn1Set.GetInstance((Asn1TaggedObject)enumerator.Current.ToAsn1Object(), false); else unauthenticatedAttributes = null; } public override Asn1Object ToAsn1Object() { Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector(version, sid, digAlgorithm); asn1EncodableVector.AddOptionalTagged(false, 0, authenticatedAttributes); asn1EncodableVector.Add(digEncryptionAlgorithm, encryptedDigest); asn1EncodableVector.AddOptionalTagged(false, 1, unauthenticatedAttributes); return new DerSequence(asn1EncodableVector); } } }