public static void Decode(ref AsnValueReader reader, Asn1Tag expectedTag, ReadOnlyMemory <byte> rebind, out Rc2CbcParameters decoded) { decoded = default; AsnValueReader sequenceReader = reader.ReadSequence(expectedTag); ReadOnlySpan <byte> rebindSpan = rebind.Span; int offset; ReadOnlySpan <byte> tmpSpan; if (!sequenceReader.TryReadInt32(out decoded.Rc2Version)) { sequenceReader.ThrowIfNotEmpty(); } if (sequenceReader.TryReadPrimitiveOctetStringBytes(out tmpSpan)) { decoded.Iv = rebindSpan.Overlaps(tmpSpan, out offset) ? rebind.Slice(offset, tmpSpan.Length) : tmpSpan.ToArray(); } else { decoded.Iv = sequenceReader.ReadOctetString(); } sequenceReader.ThrowIfNotEmpty(); }
static PssParamsAsn() { PssParamsAsn decoded = default; ReadOnlyMemory <byte> rebind = default; AsnValueReader reader; reader = new AsnValueReader(DefaultHashAlgorithm, AsnEncodingRules.DER); Medikit.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(ref reader, rebind, out decoded.HashAlgorithm); reader.ThrowIfNotEmpty(); reader = new AsnValueReader(DefaultMaskGenAlgorithm, AsnEncodingRules.DER); Medikit.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(ref reader, rebind, out decoded.MaskGenAlgorithm); reader.ThrowIfNotEmpty(); reader = new AsnValueReader(DefaultSaltLength, AsnEncodingRules.DER); if (!reader.TryReadInt32(out decoded.SaltLength)) { reader.ThrowIfNotEmpty(); } reader.ThrowIfNotEmpty(); reader = new AsnValueReader(DefaultTrailerField, AsnEncodingRules.DER); if (!reader.TryReadInt32(out decoded.TrailerField)) { reader.ThrowIfNotEmpty(); } reader.ThrowIfNotEmpty(); }
internal static void Decode(ref AsnValueReader reader, Asn1Tag expectedTag, ReadOnlyMemory <byte> rebind, out Pbkdf2Params decoded) { decoded = default; AsnValueReader sequenceReader = reader.ReadSequence(expectedTag); AsnValueReader defaultReader; Medikit.Security.Cryptography.Asn1.Pbkdf2SaltChoice.Decode(ref sequenceReader, rebind, out decoded.Salt); if (!sequenceReader.TryReadInt32(out decoded.IterationCount)) { sequenceReader.ThrowIfNotEmpty(); } if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(Asn1Tag.Integer)) { if (sequenceReader.TryReadUInt8(out byte tmpKeyLength)) { decoded.KeyLength = tmpKeyLength; } else { sequenceReader.ThrowIfNotEmpty(); } } if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(Asn1Tag.Sequence)) { Medikit.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(ref sequenceReader, rebind, out decoded.Prf); } else { defaultReader = new AsnValueReader(DefaultPrf, AsnEncodingRules.DER); Medikit.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(ref defaultReader, rebind, out decoded.Prf); } sequenceReader.ThrowIfNotEmpty(); }
internal static void Decode(ref AsnValueReader reader, Asn1Tag expectedTag, ReadOnlyMemory <byte> rebind, out PssParamsAsn decoded) { decoded = default; AsnValueReader sequenceReader = reader.ReadSequence(expectedTag); AsnValueReader explicitReader; AsnValueReader defaultReader; if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 0))) { explicitReader = sequenceReader.ReadSequence(new Asn1Tag(TagClass.ContextSpecific, 0)); Medikit.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(ref explicitReader, rebind, out decoded.HashAlgorithm); explicitReader.ThrowIfNotEmpty(); } else { defaultReader = new AsnValueReader(DefaultHashAlgorithm, AsnEncodingRules.DER); Medikit.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(ref defaultReader, rebind, out decoded.HashAlgorithm); } if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 1))) { explicitReader = sequenceReader.ReadSequence(new Asn1Tag(TagClass.ContextSpecific, 1)); Medikit.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(ref explicitReader, rebind, out decoded.MaskGenAlgorithm); explicitReader.ThrowIfNotEmpty(); } else { defaultReader = new AsnValueReader(DefaultMaskGenAlgorithm, AsnEncodingRules.DER); Medikit.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(ref defaultReader, rebind, out decoded.MaskGenAlgorithm); } if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 2))) { explicitReader = sequenceReader.ReadSequence(new Asn1Tag(TagClass.ContextSpecific, 2)); if (!explicitReader.TryReadInt32(out decoded.SaltLength)) { explicitReader.ThrowIfNotEmpty(); } explicitReader.ThrowIfNotEmpty(); } else { defaultReader = new AsnValueReader(DefaultSaltLength, AsnEncodingRules.DER); if (!defaultReader.TryReadInt32(out decoded.SaltLength)) { defaultReader.ThrowIfNotEmpty(); } } if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 3))) { explicitReader = sequenceReader.ReadSequence(new Asn1Tag(TagClass.ContextSpecific, 3)); if (!explicitReader.TryReadInt32(out decoded.TrailerField)) { explicitReader.ThrowIfNotEmpty(); } explicitReader.ThrowIfNotEmpty(); } else { defaultReader = new AsnValueReader(DefaultTrailerField, AsnEncodingRules.DER); if (!defaultReader.TryReadInt32(out decoded.TrailerField)) { defaultReader.ThrowIfNotEmpty(); } } sequenceReader.ThrowIfNotEmpty(); }