/*public static MimePart ParsePart(string data, X509Certificate2Collection certificates, SignedCms signature)
{
MimePart part = new MimePart();
if (signature.Certificates.Count != 0) part.IsSigned = true;
part.Signature = signature;
string header = data.Substring(0,Regex.Match(data, @"\r?\n\r?\n").Index);
Match m = Regex.Match(header, @"(?<=((\r?\n)|\n)|\A)\S+:(.|(\r?\n[\t ]))+(?=((\r?\n)\S)|\Z)");
while (m.Success)
{
if (m.Value.ToLower().StartsWith("content-type:")) part.ContentType = Parser.GetContentType(m.Value);
else if (m.Value.ToLower().StartsWith("content-disposition:")) part.ContentDisposition = Parser.GetContentDisposition(m.Value);
part.HeaderFields.Add(FormatFieldName(m.Value.Substring(0, m.Value.IndexOf(':'))), m.Value.Substring(m.Value.IndexOf(':') + 1));
m = m.NextMatch();
}
// S/MIME support
// TODO : Differenciate by ASN.1 decoding
if (part.ContentType.MimeType!=null && (part.ContentType.MimeType.IndexOf("application/x-pkcs7-mime") != -1 || part.ContentType.MimeType.IndexOf("application/pkcs7-mime") != -1))
{
if (part.ContentType.Parameters["smime-type"]!=null && part.ContentType.Parameters["smime-type"].ToLower().IndexOf("signed-data") != -1)
{
part.IsSigned = true;
string contentBase64 = data.Substring(Regex.Match(data, @"\r?\n\r?\n").Index);
byte[] signedData = System.Convert.FromBase64String(contentBase64);
SignedCms sig = new SignedCms();
sig.Decode(signedData);
return ParsePart(System.Text.Encoding.ASCII.GetString(sig.ContentInfo.Content), certificates, sig);
}
else
{
part.IsEncrypted = true;
string contentBase64 = data.Substring(Regex.Match(data, @"\r?\n\r?\n").Index);
EnvelopedCms env = new EnvelopedCms();
env.Decode(System.Convert.FromBase64String(contentBase64));
env.Decrypt(certificates);
byte[] decryptedContent = env.ContentInfo.Content;
return ParsePart(System.Text.Encoding.ASCII.GetString(decryptedContent), certificates);
}
}
if (part.Charset==null || part.Charset.Length < 1) part.Charset = "us-ascii";
byte[] binData = System.Text.Encoding.ASCII.GetBytes(data);
try { part.TextContent = System.Text.Encoding.GetEncoding(part.Charset).GetString(binData); }
catch { part.TextContent = data; }
m = Regex.Match(part.TextContent,@"\r?\n\r?\n");
part.TextContent = part.TextContent.Substring(m.Index+m.Length);
if (part.ContentType.MimeType != null && part.ContentType.MimeType.IndexOf("multipart/signed") != -1) part.IsSigned = true;
if (part.ContentTransferEncoding==ContentTransferEncoding.QuotedPrintable) part.TextContent = Codec.FromQuotedPrintable(part.TextContent,part.Charset);
if (part.ContentTransferEncoding == ContentTransferEncoding.Base64)
{
part.TextContent = part.TextContent.Trim('\r', '\n');
part.BinaryContent = System.Convert.FromBase64String(part.TextContent);
}
else part.BinaryContent = System.Text.Encoding.GetEncoding(part.Charset).GetBytes(part.TextContent);
return part;
}*/
private static MultipartContainer ParseMultipartContainer(MimePart part)
{
MultipartContainer container = new MultipartContainer();
string boundary = part.ContentType.Parameters["boundary"];
string[] arrpart = Regex.Split(part.TextContent, @"\r?\n?" + Regex.Escape("--" + boundary));
for (int i = 0; i < arrpart.Length; i++)
{
string strpart = arrpart[i];
if (!strpart.StartsWith("--"))
{
container.PartTree.Add(Parser.ParseMimeTypedAndEncodedContent(strpart));
}
}
return container;
}
public static MimeTypedAndEncodedContent ParseMimeTypedAndEncodedContent(string data)
{
MimeTypedAndEncodedContent part = new MimeTypedAndEncodedContent();
// Separate header and body.
int headerEnd = Regex.Match(data, @".(?=\r?\n\r?\n)").Index + 1;
int bodyStart = Regex.Match(data, @"(?<=\r?\n\r?\n).").Index - 1;
string header = data.Substring(0,headerEnd);
header = Parser.Unfold(header);
header = Codec.RFC2047Decode(header);
string body = data.Substring(bodyStart);
// Parse header fields and their parameters.
Match m = Regex.Match(header, @"(?<=((\r?\n)|\n)|\A)\S+:(.|(\r?\n[\t ]))+(?=((\r?\n)\S)|\Z)");
while (m.Success)
{
if (m.Value.ToLower().StartsWith("content-type:")) part.ContentType = Parser.GetContentType(m.Value);
else if (m.Value.ToLower().StartsWith("content-disposition:")) part.ContentDisposition = Parser.GetContentDisposition(m.Value);
part.HeaderFields.Add(FormatFieldName(m.Value.Substring(0, m.Value.IndexOf(':'))), m.Value.Substring(m.Value.IndexOf(':') + 1));
m = m.NextMatch();
}
// Is it QP encoded text ?
if (part.ContentTransferEncoding.Equals(ContentTransferEncoding.QuotedPrintable))
{
// Get the destination charset, or default to us-ascii.
string charset = "us-ascii";
if (part.Charset != null && part.Charset.Length > 0) charset = part.Charset;
// Decode
part.TextContent = Codec.FromQuotedPrintable(body, charset);
//part.BinaryContent = System.Text.Encoding.GetEncoding(charset).GetBytes(part.TextContent);
}
// Is it a Base64 encoded content ?
else if (part.ContentTransferEncoding.Equals(ContentTransferEncoding.Base64))
{
part.TextContent = body;
//part.BinaryContent = Convert.FromBase64String(part.TextContent);
}
// Is it plain text or binary data ?
else //if (part.ContentTransferEncoding.Equals(ContentTransferEncoding.SevenBits) || part.ContentTransferEncoding.Equals(ContentTransferEncoding.SevenBits))
{
// Get the destination charset, or default to us-ascii.
string charset = "us-ascii";
if (part.Charset != null && part.Charset.Length > 0) charset = part.Charset;
// Extract
part.TextContent = body;
//part.BinaryContent = System.Text.Encoding.GetEncoding(charset).GetBytes(part.TextContent);
}
// Now we have the decoded content and it's type. Let's take appropriate action.
if (part.ContentType.Type.Equals("multipart"))
{
MultipartContainer multipart = Parser.ParseMultipartContainer(part);
multipart.Track = DispatchTrack.MultipartContainer;
return multipart;
}
else if (part.ContentType.Type.Equals("message"))
{
// TODO
}
//else if (part.ContentType.Type.Equals("multipart"))
return part;
}
