internal static void Decode(ref AsnValueReader reader, ReadOnlyMemory <byte> rebind, out RecipientInfoAsn decoded) { decoded = default; Asn1Tag tag = reader.PeekTag(); if (tag.HasSameClassAndValue(Asn1Tag.Sequence)) { KeyTransRecipientInfoAsn tmpKtri; KeyTransRecipientInfoAsn.Decode(ref reader, rebind, out tmpKtri); decoded.Ktri = tmpKtri; } else if (tag.HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 1))) { KeyAgreeRecipientInfoAsn tmpKari; KeyAgreeRecipientInfoAsn.Decode(ref reader, new Asn1Tag(TagClass.ContextSpecific, 1), rebind, out tmpKari); decoded.Kari = tmpKari; } else if (tag.HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 2))) { KEKRecipientInfoAsn kekRecipientInfo; KEKRecipientInfoAsn.Decode(ref reader, new Asn1Tag(TagClass.ContextSpecific, 2), rebind, out kekRecipientInfo); decoded.KrecipientInfo = kekRecipientInfo; } else { throw new CryptographicException(); } }
internal static void Decode(ref AsnValueReader reader, Asn1Tag expectedTag, ReadOnlyMemory <byte> rebind, out KeyAgreeRecipientInfoAsn decoded) { decoded = default; AsnValueReader sequenceReader = reader.ReadSequence(expectedTag); AsnValueReader explicitReader; AsnValueReader collectionReader; ReadOnlySpan <byte> rebindSpan = rebind.Span; int offset; ReadOnlySpan <byte> tmpSpan; if (!sequenceReader.TryReadInt32(out decoded.Version)) { sequenceReader.ThrowIfNotEmpty(); } explicitReader = sequenceReader.ReadSequence(new Asn1Tag(TagClass.ContextSpecific, 0)); OriginatorIdentifierOrKeyAsn.Decode(ref explicitReader, rebind, out decoded.Originator); explicitReader.ThrowIfNotEmpty(); if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 1))) { explicitReader = sequenceReader.ReadSequence(new Asn1Tag(TagClass.ContextSpecific, 1)); if (explicitReader.TryReadPrimitiveOctetStringBytes(out tmpSpan)) { decoded.Ukm = rebindSpan.Overlaps(tmpSpan, out offset) ? rebind.Slice(offset, tmpSpan.Length) : tmpSpan.ToArray(); } else { decoded.Ukm = explicitReader.ReadOctetString(); } explicitReader.ThrowIfNotEmpty(); } AlgorithmIdentifierAsn.Decode(ref sequenceReader, rebind, out decoded.KeyEncryptionAlgorithm); // Decode SEQUENCE OF for RecipientEncryptedKeys { collectionReader = sequenceReader.ReadSequence(); var tmpList = new List <RecipientEncryptedKeyAsn>(); RecipientEncryptedKeyAsn tmpItem; while (collectionReader.HasData) { RecipientEncryptedKeyAsn.Decode(ref collectionReader, rebind, out tmpItem); tmpList.Add(tmpItem); } decoded.RecipientEncryptedKeys = tmpList.ToArray(); } sequenceReader.ThrowIfNotEmpty(); }
internal static void Decode(ref AsnValueReader reader, ReadOnlyMemory <byte> rebind, out KeyAgreeRecipientInfoAsn decoded) { Decode(ref reader, Asn1Tag.Sequence, rebind, out decoded); }