internal static Charset GetValidAndTrustedCharset(string charsetName, InboundConversionOptions options)
{
Charset validCharset = MimeHelpers.GetValidCharset(charsetName);
if (validCharset != null && (options.TrustAsciiCharsets || !ConvertUtils.MimeStringEquals(charsetName, "us-ascii")))
{
return(validCharset);
}
return(null);
}
private static bool IsMessageOpaqueSigned(ICoreItem coreItem, StreamAttachment attachment)
{
Util.ThrowOnNullArgument(coreItem, "coreItem");
string valueOrDefault = coreItem.PropertyBag.GetValueOrDefault <string>(InternalSchema.ItemClass, string.Empty);
if (!ObjectClass.IsSmime(valueOrDefault))
{
return(false);
}
coreItem.PropertyBag.Load(new PropertyDefinition[]
{
InternalSchema.NamedContentType
});
string valueOrDefault2 = coreItem.PropertyBag.GetValueOrDefault <string>(InternalSchema.NamedContentType);
if (valueOrDefault2 != null)
{
byte[] bytes = CTSGlobals.AsciiEncoding.GetBytes(valueOrDefault2);
ContentTypeHeader header = (ContentTypeHeader)Header.Create(HeaderId.ContentType);
MimeInternalHelpers.SetHeaderRawValue(header, bytes);
string headerParameter = MimeHelpers.GetHeaderParameter(header, "smime-type", 100);
if (headerParameter == null || (!ConvertUtils.MimeStringEquals(headerParameter, "signed-data") && !ConvertUtils.MimeStringEquals(headerParameter, "certs-only")))
{
return(false);
}
}
string contentType = attachment.ContentType;
if (string.Compare(contentType, "application/pkcs7-mime", StringComparison.OrdinalIgnoreCase) == 0 || string.Compare(contentType, "application/x-pkcs7-mime", StringComparison.OrdinalIgnoreCase) == 0)
{
return(true);
}
if (string.Compare(contentType, "application/octet-stream", StringComparison.OrdinalIgnoreCase) == 0)
{
string fileName = attachment.FileName;
string strA = string.Empty;
if (fileName != null)
{
string[] array = fileName.Split(new char[]
{
'.'
});
if (array.Length > 0)
{
strA = array[array.Length - 1];
}
}
return(string.Compare(strA, "p7m", StringComparison.OrdinalIgnoreCase) == 0 || string.Compare(strA, "p7c", StringComparison.OrdinalIgnoreCase) == 0 || string.Compare(strA, "p7s", StringComparison.OrdinalIgnoreCase) == 0);
}
return(false);
}
public static Charset ChooseCharset(string partCharset, string messageCharset, InboundConversionOptions conversionOptions)
{
Charset charset = MimeHelpers.GetValidAndTrustedCharset(partCharset, conversionOptions);
if (charset != null)
{
return(charset);
}
charset = MimeHelpers.GetValidAndTrustedCharset(messageCharset, conversionOptions);
if (charset != null)
{
return(charset);
}
charset = conversionOptions.DefaultCharset;
if (charset != null && charset.IsAvailable)
{
return(charset);
}
return(Culture.Default.MimeCharset);
}
internal static string GetHeaderParameter(ComplexHeader header, string parameterName, InboundConversionOptions options)
{
return(MimeHelpers.GetHeaderParameter(header, parameterName, options.Limits.MaxMimeTextHeaderLength));
}
internal static string GetHeaderValue(Header header, InboundConversionOptions options)
{
int lengthLimit = (options != null) ? options.Limits.MaxMimeTextHeaderLength : 2000;
return(MimeHelpers.GetHeaderValue(header, lengthLimit));
}
internal static string GetHeaderValue(HeaderList headers, HeaderId headerId, InboundConversionOptions options)
{
return(MimeHelpers.GetHeaderValue(headers.FindFirst(headerId), options));
}
