using Org.BouncyCastle.Asn1.X509; using System; namespace Org.BouncyCastle.Asn1.Cms { public class SignerInfo : Asn1Encodable { private readonly DerInteger m_version; private readonly SignerIdentifier m_sid; private readonly AlgorithmIdentifier m_digAlgorithm; private readonly Asn1Set m_authenticatedAttributes; private readonly AlgorithmIdentifier m_digEncryptionAlgorithm; private readonly Asn1OctetString m_encryptedDigest; private readonly Asn1Set m_unauthenticatedAttributes; public DerInteger Version => m_version; public SignerIdentifier SignerID => m_sid; public Asn1Set AuthenticatedAttributes => m_authenticatedAttributes; public AlgorithmIdentifier DigestAlgorithm => m_digAlgorithm; public Asn1OctetString EncryptedDigest => m_encryptedDigest; public AlgorithmIdentifier DigestEncryptionAlgorithm => m_digEncryptionAlgorithm; public Asn1Set UnauthenticatedAttributes => m_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 static SignerInfo GetTagged(Asn1TaggedObject taggedObject, bool declaredExplicit) { return new SignerInfo(Asn1Sequence.GetTagged(taggedObject, declaredExplicit)); } public SignerInfo(SignerIdentifier sid, AlgorithmIdentifier digAlgorithm, Attributes authenticatedAttributes, AlgorithmIdentifier digEncryptionAlgorithm, Asn1OctetString encryptedDigest, Attributes unauthenticatedAttributes) : this(sid, digAlgorithm, Asn1Set.GetInstance(authenticatedAttributes), digEncryptionAlgorithm, encryptedDigest, Asn1Set.GetInstance(unauthenticatedAttributes)) { } public SignerInfo(SignerIdentifier sid, AlgorithmIdentifier digAlgorithm, Asn1Set authenticatedAttributes, AlgorithmIdentifier digEncryptionAlgorithm, Asn1OctetString encryptedDigest, Asn1Set unauthenticatedAttributes) { if (sid == null) throw new ArgumentNullException("sid"); m_sid = sid; if (digAlgorithm == null) throw new ArgumentNullException("digAlgorithm"); m_digAlgorithm = digAlgorithm; m_authenticatedAttributes = authenticatedAttributes; if (digEncryptionAlgorithm == null) throw new ArgumentNullException("digEncryptionAlgorithm"); m_digEncryptionAlgorithm = digEncryptionAlgorithm; if (encryptedDigest == null) throw new ArgumentNullException("encryptedDigest"); m_encryptedDigest = encryptedDigest; m_unauthenticatedAttributes = unauthenticatedAttributes; m_version = (sid.IsTagged ? DerInteger.Three : DerInteger.One); } private SignerInfo(Asn1Sequence seq) { int count = seq.Count; int sequencePosition = 0; if (count < 5 || count > 7) throw new ArgumentException("Bad sequence size: " + count.ToString(), "seq"); m_version = DerInteger.GetInstance(seq[sequencePosition++]); m_sid = SignerIdentifier.GetInstance(seq[sequencePosition++]); m_digAlgorithm = AlgorithmIdentifier.GetInstance(seq[sequencePosition++]); m_authenticatedAttributes = Asn1Utilities.ReadOptionalContextTagged(seq, ref sequencePosition, 0, false, Asn1Set.GetTagged); m_digEncryptionAlgorithm = AlgorithmIdentifier.GetInstance(seq[sequencePosition++]); m_encryptedDigest = Asn1OctetString.GetInstance(seq[sequencePosition++]); m_unauthenticatedAttributes = Asn1Utilities.ReadOptionalContextTagged(seq, ref sequencePosition, 1, false, Asn1Set.GetTagged); if (sequencePosition != count) throw new ArgumentException("Unexpected elements in sequence", "seq"); } public override Asn1Object ToAsn1Object() { Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector(7); asn1EncodableVector.Add(m_version, m_sid, m_digAlgorithm); asn1EncodableVector.AddOptionalTagged(false, 0, m_authenticatedAttributes); asn1EncodableVector.Add(m_digEncryptionAlgorithm, m_encryptedDigest); asn1EncodableVector.AddOptionalTagged(false, 1, m_unauthenticatedAttributes); return new DerSequence(asn1EncodableVector); } } }