public static AttributeAsn[] NormalizeAttributeSet(
AttributeAsn[] setItems,
Action <byte[]> encodedValueProcessor = null)
{
byte[] normalizedValue;
using (AsnWriter writer = new AsnWriter(AsnEncodingRules.DER))
{
writer.PushSetOf();
foreach (AttributeAsn item in setItems)
{
item.Encode(writer);
}
writer.PopSetOf();
normalizedValue = writer.Encode();
if (encodedValueProcessor != null)
{
encodedValueProcessor(normalizedValue);
}
}
AsnReader reader = new AsnReader(normalizedValue, AsnEncodingRules.DER);
AsnReader setReader = reader.ReadSetOf();
AttributeAsn[] decodedSet = new AttributeAsn[setItems.Length];
int i = 0;
while (setReader.HasData)
{
AttributeAsn.Decode(setReader, out AttributeAsn item);
decodedSet[i] = item;
i++;
}
return(decodedSet);
}
internal static void Decode(ref AsnValueReader reader, ReadOnlyMemory <byte> rebind, out SignedAttributesSet decoded)
{
decoded = default;
Asn1Tag tag = reader.PeekTag();
AsnValueReader collectionReader;
if (tag.HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 0)))
{
// Decode SEQUENCE OF for SignedAttributes
{
collectionReader = reader.ReadSetOf(new Asn1Tag(TagClass.ContextSpecific, 0));
var tmpList = new List <AttributeAsn>();
AttributeAsn tmpItem;
while (collectionReader.HasData)
{
AttributeAsn.Decode(ref collectionReader, rebind, out tmpItem);
tmpList.Add(tmpItem);
}
decoded.SignedAttributes = tmpList.ToArray();
}
}
else
{
throw new CryptographicException();
}
}
public static void Decode(ref AsnValueReader reader, Asn1Tag expectedTag, ReadOnlyMemory <byte> rebind, out EnvelopedDataAsn decoded)
{
decoded = default;
AsnValueReader sequenceReader = reader.ReadSequence(expectedTag);
AsnValueReader collectionReader;
if (!sequenceReader.TryReadInt32(out decoded.Version))
{
sequenceReader.ThrowIfNotEmpty();
}
if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 0)))
{
OriginatorInfoAsn tmpOriginatorInfo;
OriginatorInfoAsn.Decode(ref sequenceReader, new Asn1Tag(TagClass.ContextSpecific, 0), rebind, out tmpOriginatorInfo);
decoded.OriginatorInfo = tmpOriginatorInfo;
}
// Decode SEQUENCE OF for RecipientInfos
{
collectionReader = sequenceReader.ReadSetOf();
var tmpList = new List <RecipientInfoAsn>();
RecipientInfoAsn tmpItem;
while (collectionReader.HasData)
{
RecipientInfoAsn.Decode(ref collectionReader, rebind, out tmpItem);
tmpList.Add(tmpItem);
}
decoded.RecipientInfos = tmpList.ToArray();
}
EncryptedContentInfoAsn.Decode(ref sequenceReader, rebind, out decoded.EncryptedContentInfo);
if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 1)))
{
// Decode SEQUENCE OF for UnprotectedAttributes
{
collectionReader = sequenceReader.ReadSetOf(new Asn1Tag(TagClass.ContextSpecific, 1));
var tmpList = new List <AttributeAsn>();
AttributeAsn tmpItem;
while (collectionReader.HasData)
{
AttributeAsn.Decode(ref collectionReader, rebind, out tmpItem);
tmpList.Add(tmpItem);
}
decoded.UnprotectedAttributes = tmpList.ToArray();
}
}
sequenceReader.ThrowIfNotEmpty();
}
internal static void Decode(ref AsnValueReader reader, Asn1Tag expectedTag, ReadOnlyMemory <byte> rebind, out SignerInfoAsn decoded)
{
decoded = default;
AsnValueReader sequenceReader = reader.ReadSequence(expectedTag);
AsnValueReader collectionReader;
ReadOnlySpan <byte> rebindSpan = rebind.Span;
int offset;
ReadOnlySpan <byte> tmpSpan;
if (!sequenceReader.TryReadInt32(out decoded.Version))
{
sequenceReader.ThrowIfNotEmpty();
}
SignerIdentifierAsn.Decode(ref sequenceReader, rebind, out decoded.Sid);
AlgorithmIdentifierAsn.Decode(ref sequenceReader, rebind, out decoded.DigestAlgorithm);
if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 0)))
{
tmpSpan = sequenceReader.ReadEncodedValue();
decoded.SignedAttributes = rebindSpan.Overlaps(tmpSpan, out offset) ? rebind.Slice(offset, tmpSpan.Length) : tmpSpan.ToArray();
decoded.SignedAttributesSet = SignedAttributesSet.Decode(decoded.SignedAttributes.Value, AsnEncodingRules.BER);
}
AlgorithmIdentifierAsn.Decode(ref sequenceReader, rebind, out decoded.SignatureAlgorithm);
if (sequenceReader.TryReadPrimitiveOctetStringBytes(out tmpSpan))
{
decoded.SignatureValue = rebindSpan.Overlaps(tmpSpan, out offset) ? rebind.Slice(offset, tmpSpan.Length) : tmpSpan.ToArray();
}
else
{
decoded.SignatureValue = sequenceReader.ReadOctetString();
}
if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(new Asn1Tag(TagClass.ContextSpecific, 1)))
{
// Decode SEQUENCE OF for UnsignedAttributes
{
collectionReader = sequenceReader.ReadSetOf(new Asn1Tag(TagClass.ContextSpecific, 1));
var tmpList = new List <AttributeAsn>();
AttributeAsn tmpItem;
while (collectionReader.HasData)
{
AttributeAsn.Decode(ref collectionReader, rebind, out tmpItem);
tmpList.Add(tmpItem);
}
decoded.UnsignedAttributes = tmpList.ToArray();
}
}
sequenceReader.ThrowIfNotEmpty();
}