protected void ProcessHtmlUrlTag(HtmlTagContextAttribute filterAttribute, HtmlWriter writer)
{
string value = filterAttribute.Value;
AttachmentLink attachmentLink = this.IsInlineReference(value);
if (attachmentLink != null)
{
this.OutputInlineReference(filterAttribute, attachmentLink, writer);
return;
}
SafeHtmlCallback.TypeOfUrl typeOfUrl = SafeHtmlCallback.GetTypeOfUrl(filterAttribute.Value, filterAttribute.Id);
if (typeOfUrl == SafeHtmlCallback.TypeOfUrl.Redirection)
{
filterAttribute.Write();
this.hasFoundRedirUrlInCurrentPass = true;
return;
}
if (typeOfUrl == SafeHtmlCallback.TypeOfUrl.Trusted || typeOfUrl == SafeHtmlCallback.TypeOfUrl.Local)
{
filterAttribute.Write();
return;
}
if (typeOfUrl == SafeHtmlCallback.TypeOfUrl.Unknown)
{
writer.WriteAttribute(filterAttribute.Id, " ");
}
}
protected void ProcessImageTag(HtmlTagContextAttribute filterAttribute, HtmlTagContext context, HtmlWriter writer)
{
AirSyncDiagnostics.Assert(context != null);
string value = filterAttribute.Value;
AttachmentLink attachmentLink = this.IsInlineReference(value);
if (attachmentLink != null)
{
this.OutputInlineReference(filterAttribute, attachmentLink, writer);
return;
}
if (SafeHtmlCallback.IsSafeUrl(filterAttribute.Value, filterAttribute.Id))
{
filterAttribute.Write();
}
}
// Token: 0x06001397 RID: 5015 RVA: 0x00070BF8 File Offset: 0x0006EDF8
public static Stream ConvertHtmlStream(Item item, long truncationSizeByChars, out long totalDataSize, out IList <AttachmentLink> attachmentLinks)
{
SafeHtmlCallback safeHtmlCallback = new SafeHtmlCallback(item);
bool flag = truncationSizeByChars == -1L;
BodyReadConfiguration bodyReadConfiguration;
if (flag)
{
bodyReadConfiguration = new BodyReadConfiguration(Microsoft.Exchange.Data.Storage.BodyFormat.TextHtml, "utf-8");
bodyReadConfiguration.SetHtmlOptions(HtmlStreamingFlags.FilterHtml, safeHtmlCallback);
}
else
{
bodyReadConfiguration = new BodyReadConfiguration(Microsoft.Exchange.Data.Storage.BodyFormat.TextHtml, "utf-8");
bodyReadConfiguration.SetHtmlOptions(HtmlStreamingFlags.FilterHtml, safeHtmlCallback, new int?(1024));
}
AirSyncStream airSyncStream = new AirSyncStream();
Body body = null;
if (BodyConversionUtilities.IsMessageRestrictedAndDecoded(item))
{
body = ((RightsManagedMessageItem)item).ProtectedBody;
}
else
{
body = item.Body;
}
uint streamHash;
using (Stream stream = body.OpenReadStream(bodyReadConfiguration))
{
StreamHelper.CopyStream(stream, airSyncStream, Encoding.UTF8, (int)truncationSizeByChars, true, out streamHash);
}
airSyncStream.StreamHash = (int)streamHash;
totalDataSize = ((truncationSizeByChars < 0L || airSyncStream.Length < truncationSizeByChars) ? airSyncStream.Length : body.Size);
attachmentLinks = safeHtmlCallback.AttachmentLinks;
return(airSyncStream);
}
protected static void ProcessMicrodataTag(bool writeTag, HtmlTagContext context, List <HtmlAttributeId> safeAttributes)
{
if (!writeTag)
{
context.DeleteTag();
return;
}
foreach (HtmlTagContextAttribute htmlTagContextAttribute in context.Attributes)
{
if (safeAttributes.Contains(htmlTagContextAttribute.Id))
{
bool flag = true;
if (htmlTagContextAttribute.Id == HtmlAttributeId.Href && !SafeHtmlCallback.IsSafeUrl(htmlTagContextAttribute.Value, htmlTagContextAttribute.Id))
{
flag = false;
}
if (flag)
{
htmlTagContextAttribute.Write();
}
}
}
}
public override void ProcessTag(HtmlTagContext context, HtmlWriter writer)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
bool flag = false;
bool flag2 = false;
bool flag3 = false;
bool flag4 = false;
string text = null;
string text2 = null;
string text3 = null;
if (context.TagId == HtmlTagId.Link)
{
bool writeTag = SafeHtmlCallback.WriteTagWithMicroData(context);
SafeHtmlCallback.ProcessMicrodataTag(writeTag, context, SafeHtmlCallback.linkTagAttributes);
return;
}
if (context.TagId == HtmlTagId.Head)
{
context.WriteTag(true);
return;
}
if (context.TagId == HtmlTagId.Meta)
{
bool writeTag2 = SafeHtmlCallback.WriteTagWithMicroData(context);
SafeHtmlCallback.ProcessMicrodataTag(writeTag2, context, SafeHtmlCallback.metaTagAttributes);
return;
}
if (context.TagId == HtmlTagId.Base)
{
foreach (HtmlTagContextAttribute attribute in context.Attributes)
{
if (SafeHtmlCallback.IsBaseTag(context.TagId, attribute))
{
string value = attribute.Value;
if (!Uri.TryCreate(value, UriKind.Absolute, out this.baseRef))
{
this.baseRef = null;
break;
}
break;
}
}
}
context.WriteTag();
bool flag5 = false;
foreach (HtmlTagContextAttribute htmlTagContextAttribute in context.Attributes)
{
if (context.TagId == HtmlTagId.Form || context.TagId == HtmlTagId.Input)
{
if (htmlTagContextAttribute.Id != HtmlAttributeId.Src && htmlTagContextAttribute.Id != HtmlAttributeId.Action && htmlTagContextAttribute.Id != HtmlAttributeId.Method && htmlTagContextAttribute.Id != HtmlAttributeId.Target)
{
htmlTagContextAttribute.Write();
}
}
else if (htmlTagContextAttribute.Id != HtmlAttributeId.UseMap)
{
if (SafeHtmlCallback.IsUrlTag(context.TagId, htmlTagContextAttribute))
{
if (!flag)
{
this.ProcessHtmlUrlTag(htmlTagContextAttribute, writer);
flag = true;
}
}
else if (SafeHtmlCallback.IsImageTag(context.TagId, htmlTagContextAttribute))
{
if ((htmlTagContextAttribute.Id == HtmlAttributeId.Src && !flag2) || (htmlTagContextAttribute.Id == HtmlAttributeId.DynSrc && !flag3) || (htmlTagContextAttribute.Id == HtmlAttributeId.LowSrc && !flag4))
{
this.ProcessImageTag(htmlTagContextAttribute, context, writer);
if (htmlTagContextAttribute.Value == "rtfimage://")
{
flag5 = true;
}
if (htmlTagContextAttribute.Id == HtmlAttributeId.Src)
{
flag2 = true;
}
else if (htmlTagContextAttribute.Id == HtmlAttributeId.DynSrc)
{
flag3 = true;
}
else if (htmlTagContextAttribute.Id == HtmlAttributeId.LowSrc)
{
flag4 = true;
}
}
}
else if (SafeHtmlCallback.IsBackgroundAttribute(htmlTagContextAttribute))
{
this.ProcessImageTag(htmlTagContextAttribute, context, writer);
}
else if (!SafeHtmlCallback.IsTargetTagInAnchor(context.TagId, htmlTagContextAttribute))
{
if (SafeHtmlCallback.IsSanitizingAttribute(htmlTagContextAttribute))
{
if (htmlTagContextAttribute.Id == HtmlAttributeId.Border)
{
text = htmlTagContextAttribute.Value;
}
else if (htmlTagContextAttribute.Id == HtmlAttributeId.Height)
{
text2 = htmlTagContextAttribute.Value;
}
else if (htmlTagContextAttribute.Id == HtmlAttributeId.Width)
{
text3 = htmlTagContextAttribute.Value;
}
}
else
{
htmlTagContextAttribute.Write();
}
}
}
}
if (!string.IsNullOrEmpty(text2) && !string.IsNullOrEmpty(text3) && this.hasBlockedImagesInCurrentPass)
{
SafeHtmlCallback.SanitizeImage(writer, text, text2, text3);
}
else if (!this.hasBlockedImagesInCurrentPass)
{
if (flag5)
{
writer.WriteAttribute(HtmlAttributeId.Height, "0");
writer.WriteAttribute(HtmlAttributeId.Width, "0");
}
else
{
if (!string.IsNullOrEmpty(text2))
{
writer.WriteAttribute(HtmlAttributeId.Height, text2);
}
if (!string.IsNullOrEmpty(text3))
{
writer.WriteAttribute(HtmlAttributeId.Width, text3);
}
if (!string.IsNullOrEmpty(text))
{
writer.WriteAttribute(HtmlAttributeId.Border, text);
}
}
}
if (this.hasFoundRedirUrlInCurrentPass)
{
writer.WriteAttribute(HtmlAttributeId.Target, "_BLANK");
}
this.hasBlockedImagesInCurrentPass = false;
this.hasFoundRedirUrlInCurrentPass = false;
}
protected static bool IsSafeUrl(string urlString, HtmlAttributeId htmlAttr)
{
SafeHtmlCallback.TypeOfUrl typeOfUrl = SafeHtmlCallback.GetTypeOfUrl(urlString, htmlAttr);
return(typeOfUrl != SafeHtmlCallback.TypeOfUrl.Unknown);
}
// Token: 0x0600139C RID: 5020 RVA: 0x00070E68 File Offset: 0x0006F068
private static KeyValuePair <HtmlStreamingFlags, HtmlCallbackBase> GetSafeHtmlCallbacks(Item item)
{
SafeHtmlCallback value = new SafeHtmlCallback(item);
return(new KeyValuePair <HtmlStreamingFlags, HtmlCallbackBase>(HtmlStreamingFlags.FilterHtml, value));
}
