internal static void Decode(AsnReader reader, out OaepParamsAsn decoded)
{
if (reader == null)
throw new ArgumentNullException(nameof(reader));
Decode(reader, Asn1Tag.Sequence, out decoded);
}
internal static void Decode(AsnReader reader, Asn1Tag expectedTag, out OaepParamsAsn decoded)
{
if (reader == null)
{
throw new ArgumentNullException(nameof(reader));
}
decoded = default;
AsnReader sequenceReader = reader.ReadSequence(expectedTag);
AsnReader explicitReader;
AsnReader defaultReader;
if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 0)))
{
explicitReader = sequenceReader.ReadSequence(new Asn1Tag(TagClass.ContextSpecific, 0));
System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(explicitReader, out decoded.HashFunc);
explicitReader.ThrowIfNotEmpty();
}
else
{
defaultReader = new AsnReader(s_defaultHashFunc, AsnEncodingRules.DER);
System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(defaultReader, out decoded.HashFunc);
}
if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 1)))
{
explicitReader = sequenceReader.ReadSequence(new Asn1Tag(TagClass.ContextSpecific, 1));
System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(explicitReader, out decoded.MaskGenFunc);
explicitReader.ThrowIfNotEmpty();
}
else
{
defaultReader = new AsnReader(s_defaultMaskGenFunc, AsnEncodingRules.DER);
System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(defaultReader, out decoded.MaskGenFunc);
}
if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 2)))
{
explicitReader = sequenceReader.ReadSequence(new Asn1Tag(TagClass.ContextSpecific, 2));
System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(explicitReader, out decoded.PSourceFunc);
explicitReader.ThrowIfNotEmpty();
}
else
{
defaultReader = new AsnReader(s_defaultPSourceFunc, AsnEncodingRules.DER);
System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(defaultReader, out decoded.PSourceFunc);
}
sequenceReader.ThrowIfNotEmpty();
}
static OaepParamsAsn()
{
OaepParamsAsn decoded = default;
AsnReader reader;
reader = new AsnReader(s_defaultHashFunc, AsnEncodingRules.DER);
System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(reader, out decoded.HashFunc);
reader.ThrowIfNotEmpty();
reader = new AsnReader(s_defaultMaskGenFunc, AsnEncodingRules.DER);
System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(reader, out decoded.MaskGenFunc);
reader.ThrowIfNotEmpty();
reader = new AsnReader(s_defaultPSourceFunc, AsnEncodingRules.DER);
System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(reader, out decoded.PSourceFunc);
reader.ThrowIfNotEmpty();
}
private static void DecodeCore(ref AsnValueReader reader, Asn1Tag expectedTag, ReadOnlyMemory <byte> rebind, out OaepParamsAsn 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));
System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(ref explicitReader, rebind, out decoded.HashFunc);
explicitReader.ThrowIfNotEmpty();
}
else
{
defaultReader = new AsnValueReader(DefaultHashFunc, AsnEncodingRules.DER);
System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(ref defaultReader, rebind, out decoded.HashFunc);
}
if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 1)))
{
explicitReader = sequenceReader.ReadSequence(new Asn1Tag(TagClass.ContextSpecific, 1));
System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(ref explicitReader, rebind, out decoded.MaskGenFunc);
explicitReader.ThrowIfNotEmpty();
}
else
{
defaultReader = new AsnValueReader(DefaultMaskGenFunc, AsnEncodingRules.DER);
System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(ref defaultReader, rebind, out decoded.MaskGenFunc);
}
if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 2)))
{
explicitReader = sequenceReader.ReadSequence(new Asn1Tag(TagClass.ContextSpecific, 2));
System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(ref explicitReader, rebind, out decoded.PSourceFunc);
explicitReader.ThrowIfNotEmpty();
}
else
{
defaultReader = new AsnValueReader(DefaultPSourceFunc, AsnEncodingRules.DER);
System.Security.Cryptography.Asn1.AlgorithmIdentifierAsn.Decode(ref defaultReader, rebind, out decoded.PSourceFunc);
}
sequenceReader.ThrowIfNotEmpty();
}
internal static void Decode(ref AsnValueReader reader, Asn1Tag expectedTag, ReadOnlyMemory <byte> rebind, out OaepParamsAsn 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 OaepParamsAsn decoded)
{
Decode(ref reader, Asn1Tag.Sequence, rebind, out decoded);
}
