AuthEnvelopedDataParser
namespace Org.BouncyCastle.Asn1.Cms
{
public class AuthEnvelopedDataParser
{
private Asn1SequenceParser seq;
private DerInteger version;
private IAsn1Convertible nextObject;
private bool originatorInfoCalled;
private bool isData;
public DerInteger Version => version;
public AuthEnvelopedDataParser(Asn1SequenceParser seq)
{
this.seq = seq;
version = (DerInteger)seq.ReadObject();
if (!version.HasValue(0))
throw new Asn1ParsingException("AuthEnvelopedData version number must be 0");
}
public OriginatorInfo GetOriginatorInfo()
{
originatorInfoCalled = true;
if (nextObject == null)
nextObject = seq.ReadObject();
Asn1TaggedObjectParser asn1TaggedObjectParser = nextObject as Asn1TaggedObjectParser;
if (asn1TaggedObjectParser != null && asn1TaggedObjectParser.HasContextTag(0)) {
Asn1SequenceParser obj = (Asn1SequenceParser)asn1TaggedObjectParser.ParseBaseUniversal(false, 16);
nextObject = null;
return OriginatorInfo.GetInstance(obj.ToAsn1Object());
}
return null;
}
public Asn1SetParser GetRecipientInfos()
{
if (!originatorInfoCalled)
GetOriginatorInfo();
if (nextObject == null)
nextObject = seq.ReadObject();
Asn1SetParser result = (Asn1SetParser)nextObject;
nextObject = null;
return result;
}
public EncryptedContentInfoParser GetAuthEncryptedContentInfo()
{
if (nextObject == null)
nextObject = seq.ReadObject();
if (nextObject != null) {
Asn1SequenceParser obj = (Asn1SequenceParser)nextObject;
nextObject = null;
EncryptedContentInfoParser encryptedContentInfoParser = new EncryptedContentInfoParser(obj);
isData = CmsObjectIdentifiers.Data.Equals(encryptedContentInfoParser.ContentType);
return encryptedContentInfoParser;
}
return null;
}
public Asn1SetParser GetAuthAttrs()
{
if (nextObject == null)
nextObject = seq.ReadObject();
Asn1TaggedObjectParser asn1TaggedObjectParser = nextObject as Asn1TaggedObjectParser;
if (asn1TaggedObjectParser != null) {
nextObject = null;
return (Asn1SetParser)Asn1Utilities.ParseContextBaseUniversal(asn1TaggedObjectParser, 1, false, 17);
}
if (!isData)
throw new Asn1ParsingException("authAttrs must be present with non-data content");
return null;
}
public Asn1OctetString GetMac()
{
if (nextObject == null)
nextObject = seq.ReadObject();
IAsn1Convertible asn1Convertible = nextObject;
nextObject = null;
return Asn1OctetString.GetInstance(asn1Convertible.ToAsn1Object());
}
public Asn1SetParser GetUnauthAttrs()
{
if (nextObject == null)
nextObject = seq.ReadObject();
if (nextObject != null) {
Asn1TaggedObjectParser taggedObjectParser = (Asn1TaggedObjectParser)nextObject;
nextObject = null;
return (Asn1SetParser)Asn1Utilities.ParseContextBaseUniversal(taggedObjectParser, 2, false, 17);
}
return null;
}
}
}