public static bool GetOpaqueContent(Stream inputStream, Stream outputStream)
{
bool result = false;
int num = 0;
using (Asn1Reader asn1Reader = new Asn1Reader(inputStream))
{
while (asn1Reader.ReadNext() && asn1Reader.EncodingType == EncodingType.Sequence)
{
if (!asn1Reader.ReadFirstChild() || asn1Reader.EncodingType != EncodingType.ObjectIdentifier)
{
StorageGlobals.ContextTraceDebug <int>(ExTraceGlobals.CcInboundMimeTracer, "InboundMimeConverter.GetOpaqueContent ({0}): did not find expected ContentType=EncodingType.ObjectIdentifier", ++num);
}
else if (asn1Reader.ReadValueAsOID() != OID.RSASignedData)
{
StorageGlobals.ContextTraceDebug <int>(ExTraceGlobals.CcInboundMimeTracer, "InboundMimeConverter.GetOpaqueContent ({0}): did not find expected RSA_signedData OID", ++num);
}
else if (!asn1Reader.ReadNextSibling() || asn1Reader.TagClass != TagClass.Context || asn1Reader.TagNumber != 0)
{
StorageGlobals.ContextTraceDebug <int>(ExTraceGlobals.CcInboundMimeTracer, "InboundMimeConverter.GetOpaqueContent ({0}): did not find expected content tag", ++num);
}
else if (!asn1Reader.ReadFirstChild() || asn1Reader.EncodingType != EncodingType.Sequence)
{
StorageGlobals.ContextTraceDebug <int>(ExTraceGlobals.CcInboundMimeTracer, "InboundMimeConverter.GetOpaqueContent ({0}): did not find expected EncodingType.Sequence", ++num);
}
else if (!asn1Reader.ReadFirstChild() || asn1Reader.EncodingType != EncodingType.Integer)
{
StorageGlobals.ContextTraceDebug <int>(ExTraceGlobals.CcInboundMimeTracer, "InboundMimeConverter.GetOpaqueContent ({0}): did not find expected version number", ++num);
}
else if (!asn1Reader.ReadNextSibling() || asn1Reader.EncodingType != EncodingType.Set)
{
StorageGlobals.ContextTraceDebug <int>(ExTraceGlobals.CcInboundMimeTracer, "InboundMimeConverter.GetOpaqueContent ({0}): did not find expected digest algorithm set", ++num);
}
else if (!asn1Reader.ReadNextSibling() || asn1Reader.EncodingType != EncodingType.Sequence)
{
StorageGlobals.ContextTraceDebug <int>(ExTraceGlobals.CcInboundMimeTracer, "InboundMimeConverter.GetOpaqueContent ({0}): did not find expected content tag", ++num);
}
else if (!asn1Reader.ReadFirstChild() || asn1Reader.EncodingType != EncodingType.ObjectIdentifier)
{
StorageGlobals.ContextTraceDebug <int>(ExTraceGlobals.CcInboundMimeTracer, "InboundMimeConverter.GetOpaqueContent ({0}): did not find expected ContentType = EncodingType.ObjectIdentifier for SignedData", ++num);
}
else if (asn1Reader.ReadValueAsOID() != OID.RSAData)
{
StorageGlobals.ContextTraceDebug <int>(ExTraceGlobals.CcInboundMimeTracer, "InboundMimeConverter.GetOpaqueContent ({0}): did not find expected RSA_Data OID", ++num);
}
else if (!asn1Reader.ReadNextSibling())
{
StorageGlobals.ContextTraceDebug <int>(ExTraceGlobals.CcInboundMimeTracer, "InboundMimeConverter.GetOpaqueContent ({0}): did not find any content in S/MIME blob", ++num);
}
else if (asn1Reader.TagClass != TagClass.Context || asn1Reader.TagNumber != 0)
{
StorageGlobals.ContextTraceDebug <int>(ExTraceGlobals.CcInboundMimeTracer, "InboundMimeConverter.GetOpaqueContent ({0}): did not find expected tag class or value for S/MIME blob", ++num);
}
else if (!asn1Reader.ReadFirstChild() || asn1Reader.EncodingType != EncodingType.OctetString)
{
StorageGlobals.ContextTraceDebug <int>(ExTraceGlobals.CcInboundMimeTracer, "InboundMimeConverter.GetOpaqueContent ({0}): did not find expected EncodingType for S/MIME blob", ++num);
}
else
{
BufferPoolCollection.BufferSize bufferSize = BufferPoolCollection.BufferSize.Size20K;
BufferPool bufferPool = BufferPoolCollection.AutoCleanupCollection.Acquire(bufferSize);
byte[] array = null;
try
{
array = bufferPool.Acquire();
do
{
if (!asn1Reader.IsConstructedTag)
{
for (;;)
{
int num2 = asn1Reader.ReadBytesValue(array, 0, array.Length);
if (num2 == 0)
{
break;
}
outputStream.Write(array, 0, num2);
result = true;
}
}
asn1Reader.ReadNext();
}while (asn1Reader.EncodingType == EncodingType.OctetString);
continue;
}
finally
{
if (array != null)
{
bufferPool.Release(array);
}
}
}
return(result);
}
StorageGlobals.ContextTraceDebug <int>(ExTraceGlobals.CcInboundMimeTracer, "InboundMimeConverter.GetOpaqueContent ({0}): did not find expected ContentInfo=EncodingType.Sequence", ++num);
}
return(result);
}
