internal static void Decode(AsnReader reader, Asn1Tag expectedTag, out KeyAgreeRecipientInfoAsn decoded) { if (reader == null) { throw new ArgumentNullException(nameof(reader)); } decoded = default; AsnReader sequenceReader = reader.ReadSequence(expectedTag); AsnReader explicitReader; AsnReader collectionReader; if (!sequenceReader.TryReadInt32(out decoded.Version)) { sequenceReader.ThrowIfNotEmpty(); } explicitReader = sequenceReader.ReadSequence(new Asn1Tag(TagClass.ContextSpecific, 0)); System.Security.Cryptography.Pkcs.Asn1.OriginatorIdentifierOrKeyAsn.Decode(explicitReader, 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 ReadOnlyMemory <byte> tmpUkm)) { decoded.Ukm = tmpUkm; } else { decoded.Ukm = explicitReader.ReadOctetString(); } explicitReader.ThrowIfNotEmpty(); } System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(sequenceReader, out decoded.KeyEncryptionAlgorithm); // Decode SEQUENCE OF for RecipientEncryptedKeys { collectionReader = sequenceReader.ReadSequence(); var tmpList = new List <System.Security.Cryptography.Pkcs.Asn1.RecipientEncryptedKeyAsn>(); System.Security.Cryptography.Pkcs.Asn1.RecipientEncryptedKeyAsn tmpItem; while (collectionReader.HasData) { System.Security.Cryptography.Pkcs.Asn1.RecipientEncryptedKeyAsn.Decode(collectionReader, out tmpItem); tmpList.Add(tmpItem); } decoded.RecipientEncryptedKeys = tmpList.ToArray(); } sequenceReader.ThrowIfNotEmpty(); }
internal static void Decode(AsnReader reader, out KeyAgreeRecipientInfoAsn decoded) { if (reader == null) { throw new ArgumentNullException(nameof(reader)); } Decode(reader, Asn1Tag.Sequence, out decoded); }
private static void DecodeCore(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)); System.Security.Cryptography.Pkcs.Asn1.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.TryReadPrimitiveOctetString(out tmpSpan)) { decoded.Ukm = rebindSpan.Overlaps(tmpSpan, out offset) ? rebind.Slice(offset, tmpSpan.Length) : tmpSpan.ToArray(); } else { decoded.Ukm = explicitReader.ReadOctetString(); } explicitReader.ThrowIfNotEmpty(); } System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(ref sequenceReader, rebind, out decoded.KeyEncryptionAlgorithm); // Decode SEQUENCE OF for RecipientEncryptedKeys { collectionReader = sequenceReader.ReadSequence(); var tmpList = new List <System.Security.Cryptography.Pkcs.Asn1.RecipientEncryptedKeyAsn>(); System.Security.Cryptography.Pkcs.Asn1.RecipientEncryptedKeyAsn tmpItem; while (collectionReader.HasData) { System.Security.Cryptography.Pkcs.Asn1.RecipientEncryptedKeyAsn.Decode(ref collectionReader, rebind, out tmpItem); tmpList.Add(tmpItem); } decoded.RecipientEncryptedKeys = tmpList.ToArray(); } sequenceReader.ThrowIfNotEmpty(); }
internal static void Decode(ref AsnValueReader reader, Asn1Tag expectedTag, ReadOnlyMemory <byte> rebind, out KeyAgreeRecipientInfoAsn decoded) { try { DecodeCore(ref reader, expectedTag, rebind, out decoded); } catch (AsnContentException e) { throw new CryptographicException(SR.Cryptography_Der_Invalid_Encoding, e); } }
internal static void Decode(ref AsnValueReader reader, ReadOnlyMemory <byte> rebind, out KeyAgreeRecipientInfoAsn decoded) { Decode(ref reader, Asn1Tag.Sequence, rebind, out decoded); }