internal static string GetHeaderParameter(ComplexHeader header, string parameterName, int lengthLimit)
{
if (header == null)
{
return(null);
}
MimeParameter mimeParameter = header[parameterName];
if (mimeParameter == null)
{
return(null);
}
string text = null;
try
{
text = mimeParameter.Value;
}
catch (InvalidCharsetException)
{
StorageGlobals.ContextTraceDebug <string, string>(ExTraceGlobals.CcInboundMimeTracer, "InboundMimeConverter::GetHeaderParameter: Header[{0},{1}].Value throws InvalidCharsetException", header.Name, parameterName);
return(null);
}
if (text != null && text.Length > lengthLimit)
{
StorageGlobals.ContextTraceDebug <string, string, int>(ExTraceGlobals.CcInboundMimeTracer, "InboundMimeConverter::GetHeaderParameter: Header[{0},{1}].Value exceeds length limit ({2})", header.Name, parameterName, lengthLimit);
return(null);
}
return(text);
}
internal static Item OpenAttachedItem(ItemAttachment attachment)
{
Item result;
try
{
result = attachment.GetItem(InternalSchema.ContentConversionProperties);
}
catch (ObjectNotFoundException arg)
{
StorageGlobals.ContextTraceDebug <ObjectNotFoundException>(ExTraceGlobals.CcOutboundGenericTracer, "ConvertUtils::OpenAttachedItem - unable to open embedded message, exc = {0}", arg);
result = null;
}
return(result);
}
internal static string GetHeaderValue(Header header, int lengthLimit)
{
if (header == null)
{
return(null);
}
string text = null;
try
{
text = header.Value;
}
catch (InvalidCharsetException)
{
StorageGlobals.ContextTraceDebug <string>(ExTraceGlobals.CcInboundMimeTracer, "InboundMimeConverter::GetHeaderValue: Header[{0}].Value throws InvalidCharsetException", header.Name);
return(null);
}
if (text != null && text.Length > lengthLimit)
{
StorageGlobals.ContextTraceDebug <string, int>(ExTraceGlobals.CcInboundMimeTracer, "InboundMimeConverter::GetHeaderValue: Header[{0}].Value exceeds length limit ({1})", header.Name, lengthLimit);
return(null);
}
return(text);
}
private void ReadAttribute()
{
TnefPropertyTag @null = TnefPropertyTag.Null;
if (base.CurrentComponentType == ConversionComponentType.FileAttachment)
{
TnefAttributeTag attributeTag = this.reader.AttributeTag;
if (attributeTag <= TnefAttributeTag.AttachModifyDate)
{
if (attributeTag != TnefAttributeTag.AttachTitle)
{
switch (attributeTag)
{
case TnefAttributeTag.AttachCreateDate:
case TnefAttributeTag.AttachModifyDate:
break;
default:
goto IL_71;
}
}
}
else
{
switch (attributeTag)
{
case TnefAttributeTag.AttachData:
case TnefAttributeTag.AttachMetaFile:
break;
case (TnefAttributeTag)426000:
goto IL_71;
default:
if (attributeTag != TnefAttributeTag.AttachTransportFilename && attributeTag != TnefAttributeTag.Attachment)
{
goto IL_71;
}
break;
}
}
this.ParseAttachmentProperties();
goto IL_77;
IL_71:
this.EndAttachment();
}
IL_77:
if (base.CurrentComponentType == ConversionComponentType.Message)
{
TnefAttributeTag attributeTag2 = this.reader.AttributeTag;
if (attributeTag2 <= TnefAttributeTag.RequestResponse)
{
if (attributeTag2 <= TnefAttributeTag.Body)
{
if (attributeTag2 <= TnefAttributeTag.Subject)
{
if (attributeTag2 != TnefAttributeTag.From && attributeTag2 != TnefAttributeTag.Subject)
{
goto IL_211;
}
}
else
{
switch (attributeTag2)
{
case TnefAttributeTag.MessageId:
case TnefAttributeTag.ParentId:
case TnefAttributeTag.ConversationId:
break;
default:
if (attributeTag2 != TnefAttributeTag.Body)
{
goto IL_211;
}
break;
}
}
}
else if (attributeTag2 <= TnefAttributeTag.DateReceived)
{
switch (attributeTag2)
{
case TnefAttributeTag.DateStart:
case TnefAttributeTag.DateEnd:
break;
default:
switch (attributeTag2)
{
case TnefAttributeTag.DateSent:
case TnefAttributeTag.DateReceived:
break;
default:
goto IL_211;
}
break;
}
}
else if (attributeTag2 != TnefAttributeTag.DateModified && attributeTag2 != TnefAttributeTag.RequestResponse)
{
goto IL_211;
}
}
else if (attributeTag2 <= TnefAttributeTag.MessageStatus)
{
if (attributeTag2 <= TnefAttributeTag.AidOwner)
{
if (attributeTag2 != TnefAttributeTag.Priority && attributeTag2 != TnefAttributeTag.AidOwner)
{
goto IL_211;
}
}
else
{
switch (attributeTag2)
{
case TnefAttributeTag.Owner:
case TnefAttributeTag.SentFor:
case TnefAttributeTag.Delegate:
break;
default:
if (attributeTag2 != TnefAttributeTag.MessageStatus)
{
goto IL_211;
}
this.ParseMapiProperties(true);
return;
}
}
}
else if (attributeTag2 <= TnefAttributeTag.OriginalMessageClass)
{
switch (attributeTag2)
{
case TnefAttributeTag.AttachRenderData:
this.StartNewAttachment();
this.ParseAttachRenderData();
return;
case TnefAttributeTag.MapiProperties:
break;
case TnefAttributeTag.RecipientTable:
this.ParseRecipientTable();
return;
case TnefAttributeTag.Attachment:
case (TnefAttributeTag)430086:
goto IL_211;
case TnefAttributeTag.OemCodepage:
base.SetProperty(InternalSchema.Codepage, this.reader.MessageCodepage);
return;
default:
if (attributeTag2 != TnefAttributeTag.OriginalMessageClass)
{
goto IL_211;
}
break;
}
}
else if (attributeTag2 != TnefAttributeTag.MessageClass)
{
if (attributeTag2 != TnefAttributeTag.TnefVersion)
{
goto IL_211;
}
return;
}
this.ParseMapiProperties(false);
return;
IL_211:
StorageGlobals.ContextTraceDebug <uint>(ExTraceGlobals.CcInboundTnefTracer, "Unknown TNEF attribute encountered: 0x{0:X}. Ignoring.", (uint)this.reader.AttributeTag);
}
}
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);
}
